disable opencv threading for forked process (apache#12025)

aaronmarkham · Aug 6, 2018 · abdc9e2 · abdc9e2
1 parent 14538cc
commit abdc9e2
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/src/initialize.cc b/src/initialize.cc
@@ -26,6 +26,9 @@
 #include <dmlc/logging.h>
 #include <mxnet/engine.h>
 #include "./engine/openmp.h"
+#if MXNET_USE_OPENCV
+#include <opencv2/opencv.hpp>
+#endif  // MXNET_USE_OPENCV
 
 namespace mxnet {
 #if MXNET_USE_SIGNAL_HANDLER && DMLC_LOG_STACK_TRACE
@@ -57,6 +60,9 @@ class LibraryInitializer {
         // Make children single threaded since they are typically workers
         dmlc::SetEnv("MXNET_CPU_WORKER_NTHREADS", 1);
         dmlc::SetEnv("OMP_NUM_THREADS", 1);
+#if MXNET_USE_OPENCV
+        cv::setNumThreads(0);  // disable opencv threading
+#endif  // MXNET_USE_OPENCV
         engine::OpenMP::Get()->set_enabled(false);
         Engine::Get()->Start();
       });