From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ricardo Wurmus Subject: Re: OpenBLAS and performance Date: Wed, 20 Dec 2017 16:06:17 +0100 Message-ID: <87k1xhxwuu.fsf@elephly.net> References: <20171219104956.GB806@thebird.nl> <87tvwl7h4w.fsf@albion.it.manchester.ac.uk> <87h8sl78vp.fsf@albion.it.manchester.ac.uk> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from eggs.gnu.org ([2001:4830:134:3::10]:60385) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eS9lw-0002pC-DB for guix-devel@gnu.org; Thu, 21 Dec 2017 17:57:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eS9ls-0005kY-LC for guix-devel@gnu.org; Thu, 21 Dec 2017 17:57:04 -0500 Received: from sender-of-o51.zoho.com ([135.84.80.216]:21069) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1eS9ls-0005kE-Cc for guix-devel@gnu.org; Thu, 21 Dec 2017 17:57:00 -0500 In-reply-to: <87h8sl78vp.fsf@albion.it.manchester.ac.uk> 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: Dave Love Cc: guix-devel@gnu.org Hi Dave, > 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. Do these library variants have the same binary interface, so that a user could simply preload one of them to override the default variant we use in the input graph of a given package? -- Ricardo GPG: BCA6 89B6 3655 3801 C3C6 2150 197A 5888 235F ACAC https://elephly.net