Update

paddle/fluid/framework/parallel_executor.cc

@@ -250,6 +250,8 @@ struct NCCLAllReduceOpHandle : public OpHandle {
       int dtype = -1;
       size_t numel = 0;
 
+      platform::dynload::ncclGroupStart();
+
       for (auto &p : member_->places_) {
         int dev_id = boost::get<platform::CUDAPlace>(p).device;
 
@@ -266,11 +268,12 @@ struct NCCLAllReduceOpHandle : public OpHandle {
 
         auto &nccl_ctx = member_->communication_streams_.at(dev_id);
 
-        ncclAllReduce(buffer, buffer, numel, static_cast<ncclDataType_t>(dtype),
-                      ncclSum, nccl_ctx.comm, nccl_ctx.stream());
+        platform::dynload::ncclAllReduce(
+            buffer, buffer, numel, static_cast<ncclDataType_t>(dtype), ncclSum,
+            nccl_ctx.comm, nccl_ctx.stream());
       }
 
-      ncclGroupEnd();
+      platform::dynload::ncclGroupEnd();
     }
   }
 };