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From: Rhys Ulerich <rhys.ulerich@gmail.com>
To: Maxime Boissonneault <maxime.boissonneault@calculquebec.ca>
Cc: gsl-discuss@sourceware.org
Subject: Re: Adding OpenMP support for some of the GSL functions
Date: Wed, 12 Dec 2012 21:41:00 -0000	[thread overview]
Message-ID: <CAKDqugSMk-V7Y6Dd-+aiWhew_UiJwEh3kiVRC2aAoYk+aC9qvg@mail.gmail.com> (raw)
In-Reply-To: <50C8F2E7.7070701@calculquebec.ca>

> The more intensive function is within rkf45_apply in my case. I simply added
> a few pragmas to the loops, and it speed it up quite a lot.

Having looked at where you've placed the #pragma omp parallels, have
you tried enabling vectorization to see if the time spent in those
axpy-like operations could be improved?  A good SSE-ready optimizer
should nail those.

I may have misunderstood your "millions of differential equations"
statement.  Are you rather solving one problem with a million degrees
of freedom?

- Rhys

  reply	other threads:[~2012-12-12 21:41 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-11 20:04 Maxime Boissonneault
2012-12-12 16:35 ` Frank Reininghaus
2012-12-12 21:11   ` Maxime Boissonneault
2012-12-12 21:41     ` Rhys Ulerich [this message]
2012-12-12 23:32       ` Maxime Boissonneault
2012-12-12 17:05 ` Rhys Ulerich
2012-12-12 21:13   ` Maxime Boissonneault
2012-12-12 21:36     ` Rhys Ulerich
2012-12-12 23:35       ` Maxime Boissonneault
2012-12-13  2:29         ` Rhys Ulerich
2012-12-13 13:22           ` Maxime Boissonneault
2012-12-13 15:53             ` Rhys Ulerich
2012-12-13 16:44               ` Rhys Ulerich
2012-12-13 21:07                 ` Maxime Boissonneault
2012-12-13 21:05               ` Maxime Boissonneault
2012-12-13 21:14                 ` Maxime Boissonneault

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