This repository was archived by the owner on Nov 17, 2023. It is now read-only.
This repository was archived by the owner on Nov 17, 2023. It is now read-only.
OpenMP Error #17641
Description
Description
Compiled MxNet has duplicate OpenMP library link to both libomp and libiomp.
Error Message
(Paste the complete error message. Please also include stack trace by setting environment variable DMLC_LOG_STACK_TRACE_DEPTH=10 before running your script.)
OMP: Error #15: Initializing libiomp5.so, but found libomp.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/.
To Reproduce
I have both Intel MKL and MKLDNN library installed on Ubuntu 18.04. Use the following config to compile MxNet will lead the error shown above.
cmake -DUSE_CUDA=0 -DUSE_CUDNN=0 -DUSE_MKLDNN=1 -DCMAKE_BUILD_TYPE=Release -GNinja ..
ninja -v
What have you tried to solve it?
After I deleted 3rdparty/openmp, and recompiled mxnet, this error no longer occurs.
Environment
Ubuntu 18.04, installed with Intel MKL and MKLDNN library.