CODEWITHSUNDEEP
c++opencvopenmpcpuaffinity
TheUnexpected
TheUnexpected

Reputation: 3165

Set threads affinity on OpenCV

I have a CPU-intensive code (it uses Semi-Global Stereo Matching) that runs multicore, since I've enabled WITH_OPENMP flag when compiling OpenCV for Visual Studio 2013 x64.

However, this code runs on all of my 8 logical cores (I have a 4-cores CPU with HyperThreading). I want to restrict the used cores to just Core #1, #3, #5, #7. I know that, with some OpenMP implementations, one can set the affinity at compile-time using environment variables (example for Intel, GCC).

So how can I configure OpenCV to use threads with this affinity?

Upvotes: 0

Views: 437

Answers (1)

Nuzhny
Nuzhny

Reputation: 1927

Microsoft compiler can use only openmp 2.0 and don't support an affinity mask - only OMP_NUM_THREADS.

Upvotes: 0

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