[GitHub] [incubator-mxnet] larroy edited a comment on issue #14979: [BUG] Using a package with MKL and GPU versions, using python to open a new process will cause an error

[GitBox <gi...@apache.org>]

larroy edited a comment on issue #14979: [BUG] Using a package with MKL and GPU versions, using python to open a new process will cause an error
URL: https://github.com/apache/incubator-mxnet/issues/14979#issuecomment-517083648
 
 
   Reproduced with a release CMake build
   Also reproduced with a release Make build.
   ```
   (py3_venv) piotr@ip-172-31-21-159:0: ~/mxnet [master]> python ~/test.py 
   
   Segmentation fault: 11
   
   Stack trace:
     [bt] (0) /home/piotr/mxnet/python/mxnet/../../build/libmxnet.so(+0x345d9d9) [0x7fc3e00189d9]
     [bt] (1) /lib/x86_64-linux-gnu/libc.so.6(+0x3ef20) [0x7fc4055e0f20]
     [bt] (2) /home/piotr/mxnet/build/3rdparty/openmp/runtime/src/libomp.so(+0x34250) [0x7fc3b863c250]
     [bt] (3) /home/piotr/mxnet/build/3rdparty/openmp/runtime/src/libomp.so(+0x34d3e) [0x7fc3b863cd3e]
     [bt] (4) /home/piotr/mxnet/python/mxnet/../../build/libmxnet.so(mxnet::engine::OpenMP::set_reserve_cores(int)+0x6d) [0x7fc3dff68d5d]
     [bt] (5) /home/piotr/mxnet/python/mxnet/../../build/libmxnet.so(mxnet::engine::ThreadedEnginePerDevice::PushToExecute(mxnet::engine::OprBlock*, bool)::{lambda()#2}::operator()() const+0x4f) [0x7fc3dff79c0f]
     [bt] (6) /home/piotr/mxnet/python/mxnet/../../build/libmxnet.so(std::shared_ptr<mxnet::engine::ThreadedEnginePerDevice::ThreadWorkerBlock<(dmlc::ConcurrentQueueType)1> > mxnet::common::LazyAllocArray<mxnet::engine::ThreadedEnginePerDevice::ThreadWorkerBlock<(dmlc::ConcurrentQueueType)1> >::Get<mxnet::engine::ThreadedEnginePerDevice::PushToExecute(mxnet::engine::OprBlock*, bool)::{lambda()#2}>(int, mxnet::engine::ThreadedEnginePerDevice::PushToExecute(mxnet::engine::OprBlock*, bool)::{lambda()#2})+0x414) [0x7fc3dff7b0f4]
     [bt] (7) /home/piotr/mxnet/python/mxnet/../../build/libmxnet.so(mxnet::engine::ThreadedEnginePerDevice::PushToExecute(mxnet::engine::OprBlock*, bool)+0x481) [0x7fc3dff7c871]
     [bt] (8) /home/piotr/mxnet/python/mxnet/../../build/libmxnet.so(mxnet::engine::ThreadedEngine::Push(mxnet::engine::Opr*, mxnet::Context, int, bool)+0x1a8) [0x7fc3dff6d358]
   ```
   
   
   Flags:
   
   ```
   USE_CUDA: "ON" # Build with CUDA support
   USE_OLDCMAKECUDA: "OFF" # Build with old cmake cuda
   USE_NCCL: "OFF" # Use NVidia NCCL with CUDA
   USE_OPENCV: "ON" # Build with OpenCV support
   USE_OPENMP: "ON" # Build with Openmp support
   USE_CUDNN: "ON" # Build with cudnn support) # one could set CUDNN_ROOT for search path
   USE_SSE: "ON" # Build with x86 SSE instruction support IF NOT ARM
   USE_F16C: "ON" # Build with x86 F16C instruction support) # autodetects support if "ON"
   USE_LAPACK: "ON" # Build with lapack support
   USE_MKL_IF_AVAILABLE: "ON" # Use MKL if found
   USE_MKLML_MKL: "ON" # Use MKLDNN variant of MKL (if MKL found) IF USE_MKL_IF_AVAILABLE AND (NOT APPLE)
   USE_MKLDNN: "ON" # Use MKLDNN variant of MKL (if MKL found) IF USE_MKL_IF_AVAILABLE AND (NOT APPLE)
   USE_OPERATOR_TUNING: "ON" # Enable auto-tuning of operators IF NOT MSVC
   USE_GPERFTOOLS: "ON" # Build with GPerfTools support (if found)
   USE_JEMALLOC: "ON" # Build with Jemalloc support
   USE_PROFILER: "ON" # Build with Profiler support
   USE_DIST_KVSTORE: "OFF" # Build with DIST_KVSTORE support
   USE_PLUGINS_WARPCTC: "OFF" # Use WARPCTC Plugins
   USE_PLUGIN_CAFFE: "OFF" # Use Caffe Plugin
   USE_CPP_PACKAGE: "OFF" # Build C++ Package
   USE_MXNET_LIB_NAMING: "ON" # Use MXNet library naming conventions.
   USE_GPROF: "OFF" # Compile with gprof (profiling) flag
   USE_CXX14_IF_AVAILABLE: "OFF" # Build with C++14 if the compiler supports it
   USE_VTUNE: "OFF" # Enable use of Intel Amplifier XE (VTune)) # one could set VTUNE_ROOT for search path
   ENABLE_CUDA_RTC: "ON" # Build with CUDA runtime compilation support
   BUILD_CPP_EXAMPLES: "ON" # Build cpp examples
   INSTALL_EXAMPLES: "OFF" # Install the example source files.
   USE_SIGNAL_HANDLER: "ON" # Print stack traces on segfaults.
   USE_TENSORRT: "OFF" # Enable infeference optimization with TensorRT.
   USE_ASAN: "OFF" # Enable Clang/GCC ASAN sanitizers.
   ENABLE_TESTCOVERAGE: "OFF" # Enable compilation with test coverage metric output
   CMAKE_BUILD_TYPE: "Release"
   CMAKE_CUDA_COMPILER_LAUNCHER: "ccache"
   CMAKE_C_COMPILER_LAUNCHER: "ccache"
   CMAKE_CXX_COMPILER_LAUNCHER: "ccache"
   
   ```

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