zhreshold commented on issue #13593: Low CPU usage of MXNet in subprocesses URL: https://github.com/apache/incubator-mxnet/issues/13593#issuecomment-448702230 @YutingZhang MXNET_MP_WORKER_NTHREADS can only control how many mxnet operators run in parallel, in the case of some transformations, it might not be able to parallelize as much op as possible. Due to a openmp bug, it's disabled for the worker so unfortunately it is the case. You might want to enable opencv multithreading for each worker which might be the most time consuming part in worker process
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