diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton0-1gib.json
index 48cc84e..73075ef 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton1-1gib.json
index 008a5ea..3bb2826 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton10-1gib.json
index 6267333..51bcd06 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton11-1gib.json
index 6204efd..fc0ea52 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton12-1gib.json
index a651a59..052ea8f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 0,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 0,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton13-1gib.json
index f8f1f0d..835e00e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 0,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 0,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton14-1gib.json
index 73074e3..297e431 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 0,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 0,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton15-1gib.json
index 6515fde..0332008 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton2-1gib.json
index c0e1c8a..ae7d3e6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton3-1gib.json
index 9b3f8cf..24beb3e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton4-1gib.json
index 127d564..1641fb4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 0,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 0,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton5-1gib.json
index 76345e6..4f9e4bc 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 0,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 0,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton6-1gib.json
index de3d393..4ebfdcd 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 0,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 0,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton7-1gib.json
index e94f464..f22c5f3 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton8-1gib.json
index c8cabd5..20ee947 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton9-1gib.json
index e4cd27a..dc93e7f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n0ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 0,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 0,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton0-1gib.json
index 331b1cc..57860f7 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton1-1gib.json
index 36bee30..93b55cf 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton10-1gib.json
index ea6e9c2..f0bed55 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton11-1gib.json
index 495efeb..6fc405a 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton12-1gib.json
index c93baf9..99d5764 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 10,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 10,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton13-1gib.json
index cb9885e..875cc11 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 10,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 10,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton14-1gib.json
index cf0986d..6c6578d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 10,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 10,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton15-1gib.json
index 228160c..3dc4b63 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton2-1gib.json
index 346c7f1..a665bcd 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton3-1gib.json
index ce1dba3..f8eac77 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton4-1gib.json
index fbec98c..1c4e6ab 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 10,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 10,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton5-1gib.json
index eb87e5c..102d5ce 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 10,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 10,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton6-1gib.json
index fc5910b..fe37ea5 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 10,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 10,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton7-1gib.json
index 871f922..b4954e6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton8-1gib.json
index ec2c7eb..19f9cce 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton9-1gib.json
index c040a7b..060fb18 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n10ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 10,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 10,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton0-1gib.json
index 34b0fed..703bc2e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton1-1gib.json
index 898e861..5a12c73 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton10-1gib.json
index 47e3299..d200190 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton11-1gib.json
index 8b00810..b5de85f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton12-1gib.json
index 619e925..354d416 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 11,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 11,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton13-1gib.json
index 3a704a8..432c05b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 11,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 11,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton14-1gib.json
index feeafeb..5087253 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 11,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 11,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton15-1gib.json
index 8d58d1e..729a9e4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton2-1gib.json
index eb6eeff..8e993e3 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton3-1gib.json
index 6c49377..c97d5aa 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton4-1gib.json
index e72c385..6bfd1b2 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 11,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 11,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton5-1gib.json
index 702ea73..bc500a4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 11,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 11,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton6-1gib.json
index ee16822..740da37 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 11,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 11,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton7-1gib.json
index 3ce326c..e3086db 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton8-1gib.json
index 09d98a0..9244fc3 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton9-1gib.json
index 185b1a0..a49c7c1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n11ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 11,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 11,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton0-1gib.json
index 8593df3..da3899b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 12,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 12,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton1-1gib.json
index 22b28d6..6bd10f1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 12,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 12,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton10-1gib.json
index 65a005e..1f5e166 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 12,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 12,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton11-1gib.json
index 6411539..4a2d9e4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 12,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 12,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton12-1gib.json
index ccc66c3..0d68c40 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton13-1gib.json
index 548eade..0bd7727 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton14-1gib.json
index d786c6f..0613565 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton15-1gib.json
index 642c18e..d36b0f4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton2-1gib.json
index a7ec9d0..a280bdb 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 12,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 12,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton3-1gib.json
index 95c2a3a..f2c7071 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 12,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 12,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton4-1gib.json
index ef22b49..fff24a5 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton5-1gib.json
index f2fda49..e84deb5 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton6-1gib.json
index f888770..45a09c1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton7-1gib.json
index c420e5f..c810174 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 12,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton8-1gib.json
index d3a66ec..8ac58e8 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 12,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 12,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton9-1gib.json
index 696ca06..66b38e9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n12ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 12,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 12,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 12,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton0-1gib.json
index 88ca8c8..5c1ac95 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 13,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 13,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton1-1gib.json
index 7407ef1..4af166c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 13,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 13,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton10-1gib.json
index 61901d1..6467526 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 13,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 13,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton11-1gib.json
index a2bff82..d68b202 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 13,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 13,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton12-1gib.json
index f3acf59..e1b1663 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton13-1gib.json
index c25e464..5ea981e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton14-1gib.json
index 7214f21..585f2ba 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton15-1gib.json
index ab2d495..346bf35 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton2-1gib.json
index 8d2ca08..91499af 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 13,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 13,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton3-1gib.json
index bee74fb..8c82035 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 13,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 13,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton4-1gib.json
index ffb108f..b933ff6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton5-1gib.json
index 463a7fd..7f07d71 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton6-1gib.json
index 0341a32..a3c53b3 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton7-1gib.json
index 9439b2a..b2af715 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 13,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton8-1gib.json
index 0caa944..746debb 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 13,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 13,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton9-1gib.json
index a0b172a..af10d61 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n13ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 13,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 13,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 13,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton0-1gib.json
index fa3e641..52b2b1f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 14,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 14,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton1-1gib.json
index cfd7168..190b552 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 14,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 14,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton10-1gib.json
index b0698e8..f1ebe0f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 14,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 14,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton11-1gib.json
index 54e23bd..5e8e311 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 14,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 14,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton12-1gib.json
index 344f32e..9667ece 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton13-1gib.json
index 400bed9..b2d4de6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton14-1gib.json
index 7c0c7c1..34d0a08 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton15-1gib.json
index f334f7d..6a2dab4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton2-1gib.json
index aa19f02..ecbed53 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 14,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 14,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton3-1gib.json
index 5eb0a21..347a711 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 14,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 14,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton4-1gib.json
index 5e8b587..b6841cb 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton5-1gib.json
index 58f3013..b7ebca6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton6-1gib.json
index 393377b..073486d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton7-1gib.json
index d2cd8de..fcc97fe 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 14,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton8-1gib.json
index 3fcaa02..e8fb76a 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 14,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 14,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton9-1gib.json
index 727ebf8..c7bb229 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n14ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 14,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 14,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 14,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton0-1gib.json
index 961bd33..60ac8fa 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 15,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 15,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton1-1gib.json
index d330dc7..61a60c5 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 15,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 15,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton10-1gib.json
index 58b86c9..6490146 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 15,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 15,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton11-1gib.json
index 2395b37..318610d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 15,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 15,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton12-1gib.json
index 8456334..f2e499d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton13-1gib.json
index 761604d..51536a6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton14-1gib.json
index 17e4726..78b7e4d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton15-1gib.json
index 4d2d5c4..6513faf 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton2-1gib.json
index 6da52c3..d46b8ec 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 15,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 15,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton3-1gib.json
index 93aef8d..a19165c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 15,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 15,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton4-1gib.json
index 1efb347..4f2b4cf 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton5-1gib.json
index 18f0501..fabb1af 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton6-1gib.json
index 6b21664..f4156d9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton7-1gib.json
index bd76135..0e39029 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 15,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton8-1gib.json
index be77cae..b61d2de 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 15,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 15,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton9-1gib.json
index 82c102f..470562b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n15ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 15,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 15,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 15,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton0-1gib.json
index dd8f15e..fd626a8 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton1-1gib.json
index 0d1b2ad..deac46b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton10-1gib.json
index 0808f5e..aaa0885 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton11-1gib.json
index d154e24..98aaec4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton12-1gib.json
index f33d13b..b1dbf4e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 1,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 1,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton13-1gib.json
index bb9635c..49b49c9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 1,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 1,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton14-1gib.json
index 5be50e5..46a2411 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 1,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 1,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton15-1gib.json
index 3efdb60..5d697c7 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton2-1gib.json
index a65af46..95723d7 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton3-1gib.json
index 6733008..e7bf081 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton4-1gib.json
index aa23b98..6274b9d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 1,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 1,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton5-1gib.json
index f934502..37f56b8 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 1,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 1,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton6-1gib.json
index b1e523d..df03a16 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 1,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 1,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton7-1gib.json
index d0b270e..ddbba00 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton8-1gib.json
index 89ae71d..fce0293 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton9-1gib.json
index 5849c5b..a194315 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n1ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 1,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 1,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton0-1gib.json
index 9ba8b6f..a1a7c8d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton1-1gib.json
index c06eff5..909bb8d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton10-1gib.json
index f54e59c..5c85c92 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton11-1gib.json
index ae85fe1..073d9da 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton12-1gib.json
index 183d056..0200270 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 2,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 2,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton13-1gib.json
index 201774f..b223552 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 2,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 2,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton14-1gib.json
index c234890..0dbf0d7 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 2,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 2,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton15-1gib.json
index ab714b0..c3c1bba 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton2-1gib.json
index 765e603..331ac29 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton3-1gib.json
index 0bd2d97..80a2e04 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton4-1gib.json
index c376689..bdf2593 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 2,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 2,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton5-1gib.json
index d879f54..ede269f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 2,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 2,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton6-1gib.json
index c8a846b..d0c9f42 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 2,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 2,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton7-1gib.json
index fa26bd7..047b2bb 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton8-1gib.json
index d87c559..60e4e3f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton9-1gib.json
index e01122d..0f75b94 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n2ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 2,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 2,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton0-1gib.json
index 52ebf06..50e057d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton1-1gib.json
index 9652e82..2080c17 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton10-1gib.json
index 846ba05..b9343fc 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton11-1gib.json
index 99e5f47..14ed127 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton12-1gib.json
index 54e508e..39c16db 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 3,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 3,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton13-1gib.json
index 939e004..92af71f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 3,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 3,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton14-1gib.json
index 7a364aa..638f30b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 3,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 3,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton15-1gib.json
index 941e2d7..a30edfa 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton2-1gib.json
index 384247a..54b2f48 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton3-1gib.json
index 7447200..5b2ab66 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton4-1gib.json
index a10a217..60da123 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 3,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 3,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton5-1gib.json
index 46ba2fe..b1a6d52 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 3,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 3,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton6-1gib.json
index 2216172..48ecc35 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 3,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 3,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton7-1gib.json
index 0e8fce5..5dd9fb6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton8-1gib.json
index e371f68..5dd19a9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton9-1gib.json
index 504cc64..d8f435c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n3ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 3,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 3,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton0-1gib.json
index cf9c7d2..948a00f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 4,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 4,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton1-1gib.json
index 952aae5..dbdbb55 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 4,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 4,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton10-1gib.json
index aa48523..73a3c1d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 4,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 4,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton11-1gib.json
index e2c0894..701b279 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 4,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 4,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton12-1gib.json
index 9731ddd..231350a 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton13-1gib.json
index 5545994..b6ef67e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton14-1gib.json
index c7e1911..f3fab14 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton15-1gib.json
index c28dca6..be33698 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton2-1gib.json
index e51cf27..2111116 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 4,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 4,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton3-1gib.json
index 48c4463..5b06eed 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 4,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 4,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton4-1gib.json
index a7bd8bf..14679e7 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton5-1gib.json
index bc704d5..028b061 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton6-1gib.json
index 137bc26..943d221 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton7-1gib.json
index db16e43..5f0dcab 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 4,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton8-1gib.json
index 1e35802..9ec2b19 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 4,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 4,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton9-1gib.json
index 4bcb0ce..b4ec542 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n4ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 4,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 4,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 4,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton0-1gib.json
index e8c24c4..98a43b5 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 5,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 5,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton1-1gib.json
index 450c58d..1ff402b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 5,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 5,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton10-1gib.json
index 6194301..61576ac 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 5,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 5,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton11-1gib.json
index edb5255..8efd5a0 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 5,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 5,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton12-1gib.json
index 779e5f8..62aca72 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton13-1gib.json
index 635ae9f..e7eed1c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton14-1gib.json
index 8a6d721..55ab201 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton15-1gib.json
index f4bda38..185a64b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton2-1gib.json
index 1895088..ad4c8ad 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 5,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 5,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton3-1gib.json
index 10442aa..075f0fc 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 5,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 5,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton4-1gib.json
index 63512be..42541e0 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton5-1gib.json
index ec75cd2..3331d18 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton6-1gib.json
index 66183d8..9fba2f0 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton7-1gib.json
index 0b73fbc..1f466c0 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 5,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton8-1gib.json
index 59f8629..8cb6492 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 5,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 5,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton9-1gib.json
index 08a3d2a..dde398c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n5ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 5,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 5,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 5,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton0-1gib.json
index 501370e..26b29b1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 6,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 6,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton1-1gib.json
index a48ec68..0aee0fe 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 6,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 6,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton10-1gib.json
index a0f4d72..264009b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 6,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 6,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton11-1gib.json
index e772af3..c9098da 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 6,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 6,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton12-1gib.json
index 78dfab0..949fde8 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton13-1gib.json
index 8149207..c85d303 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton14-1gib.json
index 2556ee8..79d837e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton15-1gib.json
index 5a0839f..066d49b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton2-1gib.json
index 6b67e53..da77ac3 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 6,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 6,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton3-1gib.json
index a5868f7..91db5b4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 6,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 6,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton4-1gib.json
index d3357cc..f22e871 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton5-1gib.json
index 8f9330a..dfcdbc4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton6-1gib.json
index 919f933..9d037ef 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton7-1gib.json
index 86d5346..a9b93dc 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 6,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton8-1gib.json
index 45afe39..cd987f4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 6,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 6,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton9-1gib.json
index f0f5599..e29d187 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n6ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 6,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 6,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 6,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton0-1gib.json
index 6e34411..5d0fb6f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 7,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 7,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton1-1gib.json
index 622894b..cfdcab6 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 7,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 7,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton10-1gib.json
index ce6cb28..5ee972e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 7,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 7,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton11-1gib.json
index 25cedef..183f32b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 7,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 7,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton12-1gib.json
index 39053ac..76a6d1d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton13-1gib.json
index 11c623b..e9600cf 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton14-1gib.json
index 399c504..2eaa51b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton15-1gib.json
index 4da29fb..edd04c9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton15-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 15,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton2-1gib.json
index 77f17b8..c98c5ab 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 7,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 7,
-        "node": 7
+        "node": 2
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton3-1gib.json
index bca5bb7..7fe133c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 7,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 7,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton4-1gib.json
index 6101244..965197b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton5-1gib.json
index fc4bbfe..6c8b72b 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton6-1gib.json
index 5c6dea6..df21be9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton7-1gib.json
index bb06a59..b59038e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton7-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 7,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 7,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton8-1gib.json
index 962ca72..bfd6273 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 7,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 7,
-        "node": 7
+        "node": 0
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton9-1gib.json
index a4e1168..d35de6e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n7ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 7,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 7,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 7,
-        "node": 7
+        "node": 1
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton0-1gib.json
index b176aa5..3b22eca 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton1-1gib.json
index 1311b53..a37e81c 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton10-1gib.json
index 51875b5..5a287dc 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton11-1gib.json
index f6bea91..795ecf5 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton12-1gib.json
index 247ddf4..0f2644d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 8,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 8,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton13-1gib.json
index e31a703..6137a0a 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 8,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 8,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton14-1gib.json
index 4e377eb..c188ae1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 8,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 8,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton15-1gib.json
index c1ba571..906137d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton2-1gib.json
index ae8c9a4..1a8ce7d 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton3-1gib.json
index 6cd1239..58c3717 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton4-1gib.json
index eec69ad..6404e87 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 8,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 8,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton5-1gib.json
index ae46f4e..6d99cbf 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 8,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 8,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton6-1gib.json
index 0058870..01df2e7 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 8,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 8,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton7-1gib.json
index 21b94bf..75bbbb0 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton8-1gib.json
index 5735436..3ffd0d8 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton9-1gib.json
index c74dd1f..a8ae300 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n8ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 8,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 8,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton0-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton0-1gib.json
index 696c44d..9ea2a4a 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton0-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton0-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 0,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 0,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton1-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton1-1gib.json
index 785430a..08f9727 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton1-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton1-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 1,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 1,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton10-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton10-1gib.json
index 3007b38..b54bfb1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton10-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton10-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 10,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 10,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton11-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton11-1gib.json
index b719433..71f8601 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton11-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton11-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 11,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 11,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton12-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton12-1gib.json
index b81aa10..0a987c0 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton12-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton12-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 9,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 12,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 12,
-        "nnode_src": 9,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton13-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton13-1gib.json
index 2dfb819..05cb5c4 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton13-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton13-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 9,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 13,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 13,
-        "nnode_src": 9,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton14-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton14-1gib.json
index d8110a1..ea28872 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton14-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton14-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 9,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 14,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 14,
-        "nnode_src": 9,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton15-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton15-1gib.json
index 076f40a..3b882f1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton15-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton15-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 15,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 15,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton2-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton2-1gib.json
index 29b605a..afeb683 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton2-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton2-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 2,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 2,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton3-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton3-1gib.json
index 99c0d64..b7c35e3 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton3-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton3-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 3,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 3,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton4-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton4-1gib.json
index eaa842d..435136e 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton4-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton4-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 9,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 4,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 4,
-        "nnode_src": 9,
-        "node": 7
+        "node": 4
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton5-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton5-1gib.json
index 818cac8..240f8cb 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton5-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton5-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 9,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 5,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 5,
-        "nnode_src": 9,
-        "node": 7
+        "node": 5
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton6-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton6-1gib.json
index fb93c4a..014abf9 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton6-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton6-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
     {
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 9,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
@@ -20,97 +20,7 @@
       "affinity": {
         "nnode_dst": 6,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 6,
-        "nnode_src": 9,
-        "node": 7
+        "node": 6
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton7-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton7-1gib.json
index 3d121dd..21bb2e1 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton7-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton7-1gib.json
@@ -1,96 +1,6 @@
 {
-  "count": 8,
+  "count": 2,
   "list": [
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 7,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
     {
       "affinity": {
         "nnode_dst": 7,
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton8-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton8-1gib.json
index d476834..1d70464 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton8-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton8-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 8,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 8,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
diff --git a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton9-1gib.json b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton9-1gib.json
index 5060e1e..ec54a4f 100644
--- a/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton9-1gib.json
+++ b/benchmarks/benchmark-descriptors/peak-perf-bench/copy-n9ton9-1gib.json
@@ -1,11 +1,11 @@
 {
-  "count": 8,
+  "count": 4,
   "list": [
     {
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -20,7 +20,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -35,7 +35,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {
@@ -50,67 +50,7 @@
       "affinity": {
         "nnode_dst": 9,
         "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 9,
-        "node": 7
-      },
-      "task": {
-        "batching": {
-          "batch_size": 0,
-          "batch_submit": false
-        },
-        "iterations": 10,
-        "size": 1073741824
-      }
-    },
-    {
-      "affinity": {
-        "nnode_dst": 9,
-        "nnode_src": 9,
-        "node": 7
+        "node": 3
       },
       "task": {
         "batching": {