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Consider interactions between vcomp and libomp on Windows with BLIS?

Open ogrisel opened this issue 6 years ago • 2 comments

Apparently, it's possible to get BLIS to work on windows when built with Clang/LLVM:

https://github.com/numpy/numpy/issues/7372#issuecomment-409364435

Which means that if we have Cython extension built with MSVC calling into BLIS built with Clang/LLVM we will possibly get a new type of OpenMP nesting...

This case would be possible in scikit-learn for the new Cython K-Means calling into the BLAS API scipy-blis, shall scipy use BLIS in the future (which is considered on their roadmap).

ogrisel avatar Dec 08 '19 10:12 ogrisel

For practicalities, it should be quite easy to install clang under Windows using the conda-forge channel, e.g. one of the following packages:

https://anaconda.org/conda-forge/clang https://anaconda.org/conda-forge/clangdev

ogrisel avatar Dec 08 '19 10:12 ogrisel

Also we should check that there is no bad interactions between Clang/LLVM OpenMP and Intel OpenMP (e.g. from numpy from the default conda channel linked with MKL) on Windows as we observed on Linux.

ogrisel avatar Dec 16 '19 15:12 ogrisel