[C++] How to set number of threads using openmp

[bitnick10]

System information

• OS Platform and Distribution (e.g., Linux Ubuntu 16.04):win10
• ONNX Runtime installed from (source or binary):nuget
• ONNX Runtime version:1.5.2

session_options_.SetIntraOpNumThreads(1);
WARNING: Since openmp is enabled in this build, this API cannot be used to configure intra op num threads. Please use the openmp environment variables to control the number of threads.

[zhuxiaoxuhit]

add this cmd in ur ~/.bashrc

export OMP_NUM_THREADS=8

[zhuxiaoxuhit]

OK, ur sysmtem is windows

set OMP_NUM_THREADS[=num]

[zhuxiaoxuhit]

This is a tutorial.
https://docs.microsoft.com/en-us/cpp/parallel/openmp/reference/openmp-environment-variables?view=msvc-160