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From GitBox <...@apache.org>
Subject [GitHub] [singa] XJDKC commented on a change in pull request #716: SINGA-510 Distributed Training Time Profiling
Date Sat, 06 Jun 2020 14:40:50 GMT

XJDKC commented on a change in pull request #716:
URL: https://github.com/apache/singa/pull/716#discussion_r436273939



##########
File path: src/io/communicator.cc
##########
@@ -179,14 +175,14 @@ void Communicator::wait() {
   device_->Exec(
       [this](Context *ctx) mutable {
         // synchronizing on all the CUDA streams used by communicator
-        CUDA_CHECK(cudaEventRecord(event, s));
-        CUDA_CHECK(cudaStreamWaitEvent(NULL, event, 0));
-        CUDA_CHECK(cudaEventRecord(event, c1));
-        CUDA_CHECK(cudaStreamWaitEvent(NULL, event, 0));
-        CUDA_CHECK(cudaEventRecord(event, c2));
-        CUDA_CHECK(cudaStreamWaitEvent(NULL, event, 0));
+        CUDA_CHECK(cudaEventRecord(event, ctx->s));
+        CUDA_CHECK(cudaStreamWaitEvent(ctx->stream, event, 0));
+        CUDA_CHECK(cudaEventRecord(event, ctx->c1));
+        CUDA_CHECK(cudaStreamWaitEvent(ctx->stream, event, 0));
+        CUDA_CHECK(cudaEventRecord(event, ctx->c2));
+        CUDA_CHECK(cudaStreamWaitEvent(ctx->stream, event, 0));
       },
-      blocks_, blocks_, "wait");
+      blocks_, blocks_, "Sync");

Review comment:
       Got it.




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