anirudh2290 commented on a change in pull request #13606: Complimentary gluon
DataLoader improvements
URL: https://github.com/apache/incubator-mxnet/pull/13606#discussion_r240914759
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File path: src/initialize.cc
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@@ -57,13 +57,18 @@ class LibraryInitializer {
Engine::Get()->Start();
},
[]() {
- // Make children single threaded since they are typically workers
- dmlc::SetEnv("MXNET_CPU_WORKER_NTHREADS", 1);
- dmlc::SetEnv("OMP_NUM_THREADS", 1);
+ // Conservative thread management for multiprocess workers
+ const size_t mp_worker_threads =
dmlc::GetEnv("MXNET_MP_WORKER_NTHREADS", 1);
+ const size_t mp_omp_threads = dmlc::GetEnv("MXNET_MP_OMP_NUM_THREADS",
1);
Review comment:
libgomp doesnt play well with fork:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52303 . Which means user using
libgomp and increasing the num threads can run into a deadlock.
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