From: dominiq@lps.ens.fr (Dominique Dhumieres)
To: tkoenig@netcologne.de
Cc: gcc-patches@gcc.gnu.org, fortran@gcc.gnu.org, jvdelisle@charter.com
Subject: Re: [patch, fortran, RFC] First steps towards inlining matmul
Date: Sun, 05 Apr 2015 13:55:00 -0000 [thread overview]
Message-ID: <20150405135519.AF21A105@mailhost.lps.ens.fr> (raw)
> > So, what do you think about this?
>
> I am curious about what performance gain results from this?
> I can see saving a library call to our runtime libraries.
> Do you have some timing results?
>
> Jerry
IMO the inlining of MATMUL should be restricted to small matrices (less than 4x4, 9x9
or 16x16 depending of your field!-). I have a variant of the polyhedron test induct.f90
in which I have replaced three dot products by the equivalent matmul and which executes
ten times slower than the original test.
Dominique
next reply other threads:[~2015-04-05 13:55 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-05 13:55 Dominique Dhumieres [this message]
2015-04-05 14:33 ` Thomas Koenig
2015-04-05 18:25 ` Dominique d'Humières
2015-04-05 20:37 ` Thomas Koenig
2015-04-05 23:15 ` Dominique d'Humières
2015-04-06 12:18 ` Dominique d'Humières
2015-04-09 22:18 ` Thomas Koenig
2015-04-10 14:15 ` Dominique d'Humières
2015-04-10 16:57 ` Dominique d'Humières
2015-04-11 12:24 ` Thomas Koenig
2015-04-11 13:43 ` Mikael Morin
2015-04-11 17:01 ` Thomas Koenig
-- strict thread matches above, loose matches on Subject: below --
2015-04-05 12:32 Thomas Koenig
2015-04-05 13:20 ` Jerry DeLisle
2015-04-05 13:48 ` Thomas Koenig
2015-04-07 19:24 ` David Malcolm
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