recreated pr 914 to work with current develop branch (#979)

src/misc/msccl/msccl_lifecycle.cc

@@ -215,10 +215,11 @@ static ncclResult_t mscclInternalSchedulerSelectAlgo(struct mscclSchedulerParam*
   mscclStatus& status = mscclGetStatus();
   param->scheduled = false;
 
-  // Current MSCCL doesn't support pre/post op
+  
+  /*// Current MSCCL doesn't support pre/post op
   if (param->op >= ncclAvg) {
     return ncclSuccess;
-  }
+  }*/
 
   // Whether the algorithm is in-place
   bool isInPlace = false;