anirudh2290 commented on issue #13602: Fix for import mxnet taking long time if multiple process launched URL: https://github.com/apache/incubator-mxnet/pull/13602#issuecomment-446826631 To summarize an offline discussion with @Vikas89 . The auto tuning feature has performance benefits which has been documented in https://github.com/apache/incubator-mxnet/pull/8686 in the attached txt. [tune_all.txt](https://github.com/apache/incubator-mxnet/files/2674360/tune_all.txt) As we can see for various operator and different inputs the Auto tune selects whether to use OMP or not. For close to 90% of the tests it makes the right selection. Also @Vikas89 tried to remove tuning for child process since we are disabling openmp for child process, but since the tuning gets triggered during static variable initialization as part of process startup, changes to the fork handlers are not reflected in the tuning code. So we decided to stick to the existing implementation to reduce the number of iterations for omp overhead calculation.
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