If installing pygram11 from conda-forge, OpenMP is available. If using
PyPI or a source release, the
setup.py script tests to see of
OpenMP is available during installation.
Three platforms have been manually tested for OpenMP support (to not worry about this, just use conda-forge):
- Arch Linux: system python (3.7.2) and GCC (8.2).
- Debian Buster: system python3 (3.7.2) with GCC 8.3 and
- macOS 10.14: Homebrew python3 (3.7.2) with
libompinstalled from Homebrew (Apple LLVM version 10.0.0). Also (not conda-forge) Anaconda python3 (3.6.8 and 3.7.2) and python2 (2.7.15) distributions with
libompinstalled from Homebrew (you’ll likely need to remove the extra
libiomp5.dylibfrom the Anaconda environment
conda install nomkl, see here).
To check if OpenMP was detected and used while compiling the extension
pygram11._core, try the following:
>>> import pygram11 >>> pygram11.OPENMP True
Needless to say, if you see
False OpenMP acceleration isn’t
The histogramming functions use a named argument (
requesting OpenMP usage. If
omp argument is ignored by the C++ library.