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=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 1DB91C433B4 for ; Wed, 14 Apr 2021 09:58:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EA2086103D for ; Wed, 14 Apr 2021 09:58:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233329AbhDNJ6c (ORCPT ); Wed, 14 Apr 2021 05:58:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59574 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230480AbhDNJ63 (ORCPT ); Wed, 14 Apr 2021 05:58:29 -0400 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 316A3C061574; Wed, 14 Apr 2021 02:58:08 -0700 (PDT) Received: from zn.tnic (p200300ec2f0e8f0047b5d8db40ec11d2.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:8f00:47b5:d8db:40ec:11d2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id 8A68B1EC032C; Wed, 14 Apr 2021 11:58:06 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1618394286; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:in-reply-to:in-reply-to: references:references; bh=O2/Nth0Ek9vgIr/sNrwsbrqi3kRBqwbr5ol6D00LqUQ=; b=Yv3FKTlRnE/zHas+x7xfVswEv2z3PbYOf78NYzxeoamRlcE1RJAqNy0sMxFOseGUBWju7A 6wkzVwAXkVd8BGHW48ox3T/EcIt5fCg4FqQRccHs2gVyn845OZVT0VBQfSpKj0j4ePvHSb XR96oi6rdRz1Row0CtBAu9JeXs9QFF8= Date: Wed, 14 Apr 2021 11:58:04 +0200 From: Borislav Petkov To: Len Brown Cc: Willy Tarreau , 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: <20210414095804.GB10709@zn.tnic> References: <87lf9nk2ku.fsf@oldenburg.str.redhat.com> <20210413034346.GA22861@1wt.eu> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette