zhreshold commented on issue #13593: Low CPU usage of MXNet in subprocesses URL: https://github.com/apache/incubator-mxnet/issues/13593#issuecomment-533722252 @YutingZhang Just tested out the master version, the ENV variable `OMP_NUM_THREADS` can now effectively control the OMP threads each worker is allowed to use. For example, `OMP_NUM_THREADS=32 python3 mxnet_cpu_test.py --num-workers=2` gives 
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