Sturla Molden <sturla.molden@...> writes: > > "Leon Bottou" <leon@...> wrote: > > > I am making heavy uses of OpenBlas which also uses OpenMP. > > Using the same queue manager prevents lots of CPU provisioning problem. > > Using multiple queue managers in the same code does not work as well because > > they are not aware of what the other one is doing. > > Normally OpenBLAS is built without OpenMP. Also, OpenMP is not fork safe > (cf. multiprocessing) but OpenBLAS' own threadpool is. So it is recommended > to build OpenBLAS without OpenMP dependency. > > That is: If you build OpenBLAS with OpenMP, numpy.dot will hang if used > together with multiprocessing. > > Sturla > >
Just wanting to clarify that it's only the GNU OpenMP implementation that isn't fork-safe? AFAIK the intel OpenMP runtime is and will at some stage be available in the master branch of clang. -Dave _______________________________________________ cython-devel mailing list cython-devel@python.org https://mail.python.org/mailman/listinfo/cython-devel
