From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A14D0C433ED for ; Wed, 14 Apr 2021 10:07:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 79C47613B1 for ; Wed, 14 Apr 2021 10:07:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346662AbhDNKH3 (ORCPT ); Wed, 14 Apr 2021 06:07:29 -0400 Received: from wtarreau.pck.nerim.net ([62.212.114.60]:51614 "EHLO 1wt.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232032AbhDNKH0 (ORCPT ); Wed, 14 Apr 2021 06:07:26 -0400 Received: (from willy@localhost) by pcw.home.local (8.15.2/8.15.2/Submit) id 13EA6d24030291; Wed, 14 Apr 2021 12:06:39 +0200 Date: Wed, 14 Apr 2021 12:06:39 +0200 From: Willy Tarreau To: Borislav Petkov Cc: Len Brown , Andy Lutomirski , Florian Weimer , "Bae, Chang Seok" , Dave Hansen , X86 ML , LKML , linux-abi@vger.kernel.org, "libc-alpha@sourceware.org" , Rich Felker , Kyle Huey , Keno Fischer Subject: Re: Candidate Linux ABI for Intel AMX and hypothetical new related features Message-ID: <20210414100639.GD29220@1wt.eu> References: <87lf9nk2ku.fsf@oldenburg.str.redhat.com> <20210413034346.GA22861@1wt.eu> <20210414095804.GB10709@zn.tnic> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210414095804.GB10709@zn.tnic> User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 14, 2021 at 11:58:04AM +0200, Borislav Petkov wrote: > On Tue, Apr 13, 2021 at 03:51:50PM -0400, Len Brown wrote: > > AMX does the type of matrix multiplication that AI algorithms use. In > > the unlikely event that you or one of the libraries you call are doing > > the same, then you will be very happy with AMX. Otherwise, you'll > > probably not use it. > > Which sounds to me like AMX is something which should not be enabled > automatically but explicitly requested. I don't see the majority of the > processes on the majority of the Linux machines out there doing AI with > AMX - at least not anytime soon. If it becomes ubiquitous later, we can > make it automatic then. And change jobs :-) Willy