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Set OMP_NUM_THREADS for calculation kernels #42

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achimnol opened this issue Mar 27, 2017 · 0 comments
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Set OMP_NUM_THREADS for calculation kernels #42

achimnol opened this issue Mar 27, 2017 · 0 comments
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achimnol commented Mar 27, 2017 •
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Several code examples (e.g., this one) using TensorFlow crash due to thread limits imposed by our jail.

terminate called after throwing an instance of 'std::system_error'
  what():  Operation not permitted

The root cause is libeigen (a C++ matrix calculation library) used by TensorFlow which reads OMP_NUM_THREADS environment variable to initialize its thread pool.

ref) http://eigen.tuxfamily.org/dox/TopicMultiThreading.html
@achimnol achimnol added the bug label Mar 27, 2017
@achimnol achimnol self-assigned this Mar 27, 2017
achimnol added a commit that referenced this issue Mar 28, 2017
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refs #42: Add OMP_NUM_THREADS to allowed envvar in tensorflow jail po…
afd67cc 
…licy.
achimnol added a commit that referenced this issue Mar 28, 2017
@achimnol
refs #42: Increase memory limits of tensorflow kernels.
ae23454 
 * Also add OMP_NUM_THREADS to core-count envvars set by Sorna.
@achimnol achimnol closed this as completed Sep 7, 2017
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