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Re: OpenBLAS and performance


From: Dave Love
Subject: Re: OpenBLAS and performance
Date: Wed, 20 Dec 2017 14:48:42 +0000
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux)

I wrote: 

> If you do provide some sort of threaded version for Python, then as far
> as I remember it must use pthreads, not OpenMP, though you want the
> OpenMP version for other purposes, and I hadn't realized there wasn't
> one currently.

I was confused.  I see the only version of the library shipped is built
with pthreads.  I think there should be serial, pthreads, and OpenMP
versions, as for Fedora.  It may also be useful to provide the 64-bit
integer versions, like Fedora; that's useful for at least a flagship
chemistry program.

I also remembered the problems with 0.2.20.  I'll send a patch for the
wrong cache size used on some x86_64 when I get a chance.




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