From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ricardo Wurmus Subject: Re: OpenBLAS and performance Date: Thu, 21 Dec 2017 00:02:55 +0100 Message-ID: <878tdxxasg.fsf@elephly.net> References: <20171219104956.GB806@thebird.nl> <87tvwl7h4w.fsf@albion.it.manchester.ac.uk> <87h8sl78vp.fsf@albion.it.manchester.ac.uk> <20171220172215.GA7926@thebird.nl> <87d139xo3v.fsf@elephly.net> <20171220192802.GA8426@thebird.nl> <87bmitxj81.fsf@elephly.net> <20171220203215.GA8737@thebird.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:43903) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eRo7m-0006HI-IT for guix-devel@gnu.org; Wed, 20 Dec 2017 18:50:11 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eRo7k-0003qJ-Lc for guix-devel@gnu.org; Wed, 20 Dec 2017 18:50:10 -0500 Received: from sender-of-o51.zoho.com ([135.84.80.216]:21085) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eRo7k-0003pT-Bu for guix-devel@gnu.org; Wed, 20 Dec 2017 18:50:08 -0500 In-reply-to: <20171220203215.GA8737@thebird.nl> List-Id: "Development of GNU Guix and the GNU System distribution." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: guix-devel-bounces+gcggd-guix-devel=m.gmane.org@gnu.org Sender: "Guix-devel" To: Pjotr Prins Cc: guix-devel@gnu.org, Dave Love Pjotr Prins writes: > On Wed, Dec 20, 2017 at 09:00:46PM +0100, Ricardo Wurmus wrote: >> > I do think we need to default to a conservative openblas for general >> > use. Question is how we make it fly on dedicated hardware. >> >> Have you tried preloading the special library with LD_PRELOAD? > > It is not a question of what I can do. It is a question of how we give > other people the benefit of optimized libs in an elegant way. I=E2=80=99m asking because preloading different BLAS libraries is a thing. = If this works then we can ask people to just pick their favourite BLAS library variant and preload it. We don=E2=80=99t need to build all combina= tions of library variants and applications. > I think channels actually should make a difference if we don't cater > in default Guix for such use cases. I think channels (and really: alternative build farms) do make sense for tuned builds. -- Ricardo GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC https://elephly.net