larroy edited a comment on issue #10856: Failed OpenMP assertion when loading MXNet compiled with DEBUG=1 URL: https://github.com/apache/incubator-mxnet/issues/10856#issuecomment-505134548 I tried with the PR from Anton, and I also get a crash, in that version we are only linking with MKL's openmp: ``` (py3_venv) pllarroy@elite:1: ~/d/GradOptMXNet [autograd_fixes]> ./fc_mx.py w odict_values([Parameter sequential0_dense0_weight (shape=(3, 0), dtype=float32), Parameter sequential0_dense0_bias (shape=(3,), dtype=float32)]) OMP: Error #15: Initializing libiomp5.so, but found libiomp5.so already initialized. OMP: Hint This means that multiple copies of the OpenMP runtime have been linked into the program. That is dangerous, since it can degrade performance or cause incorrect results. The best thing to do is to ensure that only a single OpenMP runtime is linked into the process, e.g. by avoiding static linking of the OpenMP runtime in any library. As an unsafe, unsupported, undocumented workaround you can set the environment variable KMP_DUPLICATE_LIB_OK=TRUE to allow the program to continue to execute, but that may cause crashes or silently produce incorrect results. For more information, please see http://www.intel.com/software/products/support/. fish: “./fc_mx.py” terminated by signal SIGABRT (Abort) (py3_venv) pllarroy@elite:134: ~/d/GradOptMXNet [autograd_fixes]> ldd /home/ANT.AMAZON.COM/pllarroy/devel/mxnet/python/mxnet/../../build/libmxnet.so | grep -i openmp (py3_venv) pllarroy@elite:1: ~/d/GradOptMXNet [autograd_fixes]> ldd /home/ANT.AMAZON.COM/pllarroy/devel/mxnet/python/mxnet/../../build/libmxnet.so | grep -i omp libiomp5.so => /home/ANT.AMAZON.COM/pllarroy/devel/mxnet/build/mklml/mklml_lnx_2019.0.5.20190502/lib/libiomp5.so (0x00007f60c8446000) (py3_venv) pllarroy@elite:0: ~/d/GradOptMXNet [autograd_fixes]> ipython Python 3.6.8 (default, Jan 14 2019, 11:02:34) Type 'copyright', 'credits' or 'license' for more information IPython 7.5.0 -- An enhanced Interactive Python. Type '?' for help. In [1]: import mxnet as mx mx.li In [2]: mx.libinfo.find_lib_path() Out[2]: ['/home/ANT.AMAZON.COM/pllarroy/devel/mxnet/python/mxnet/../../build/libmxnet.so'] In [3]: Do you really want to exit ([y]/n)? y ``` https://github.com/apache/incubator-mxnet/pull/12160 When compiling without OpenMP the example above doesn't crash.
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