CODEWITHSUNDEEP
cudaopenmpnvidiarace-condition
user2188453
user2188453

Reputation: 1145

Could cuda stream creation cause a data race condition?

I am now debugging a project, still have not figure out which part is wrong, however I suspect a race condition occurs during the stream creation:

Considering the following code:

#pragma omp parallel num_threads(4)
{

  int threadId = omp_get_thread_num();

  cudaSetDevice(threadId);

  cudaStream_t streams[20];

  for (int i=0; i<20; ++i) cudaStreamCreate(streams+i);

};

Would that cause a potential race condition, e.g. different thread create streams with the same stream id yet on different device id?

Upvotes: 0

Views: 228

Answers (1)

jgonzac
jgonzac

Reputation: 185

Have you tested to create the cudaStreams in a serial way? You can create the cudaStreams first serially, and then parallelize the code you need.

Upvotes: 1

Related Questions