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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham 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 35664C433DB for ; Tue, 12 Jan 2021 14:15:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id E83C52311D for ; Tue, 12 Jan 2021 14:15:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728742AbhALOP3 (ORCPT ); Tue, 12 Jan 2021 09:15:29 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725613AbhALOP2 (ORCPT ); Tue, 12 Jan 2021 09:15:28 -0500 Received: from mail.skyhub.de (mail.skyhub.de [IPv6:2a01:4f8:190:11c2::b:1457]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 52458C061575 for ; Tue, 12 Jan 2021 06:14:48 -0800 (PST) Received: from zn.tnic (p200300ec2f0e8c004f0317ef2d68091d.dip0.t-ipconnect.de [IPv6:2003:ec:2f0e:8c00:4f03:17ef:2d68:91d]) (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 EA1FA1EC0472; Tue, 12 Jan 2021 15:14:44 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1610460885; 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=hngORQgRG46QizXwWrP2zHg2kjdLhdRg1OBJMju8KYI=; b=mYIyGVoKQfsLI67uWiDlasNdLA69eE1ZXhHBk3BaKMOmPWZUxfz2gnZWKIx4CSAbJcOQRk MZa3627NRyKGCd3ReUzQu7sx52TU2AeMfdDNx8EEyBDSBaBtSZljeLosObEGixqB/PJgZ2 benk2sNsrcExVJe2qLGV+vB9nX+JuTQ= Date: Tue, 12 Jan 2021 15:14:38 +0100 From: Borislav Petkov To: kernel test robot Cc: "Paul E. McKenney" , Jonathan Lemon , Tony Luck , LKML , x86@kernel.org, lkp@lists.01.org, lkp@intel.com, ying.huang@intel.com, feng.tang@intel.com, zhengjun.xing@intel.com Subject: Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression Message-ID: <20210112141438.GF13086@zn.tnic> References: <20210112142109.GE30747@xsang-OptiPlex-9020> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210112142109.GE30747@xsang-OptiPlex-9020> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 12, 2021 at 10:21:09PM +0800, kernel test robot wrote: > > Greeting, > > FYI, we noticed a -4.5% regression of netperf.Throughput_tps due to commit: > > > commit: 7bb39313cd6239e7eb95198950a02b4ad2a08316 ("x86/mce: Make mce_timed_out() identify holdout CPUs") > https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git ras/core > > > in testcase: netperf > on test machine: 192 threads Intel(R) Xeon(R) Platinum 9242 CPU @ 2.30GHz with 192G memory > with following parameters: > > ip: ipv4 > runtime: 300s > nr_threads: 16 > cluster: cs-localhost > test: TCP_CRR > cpufreq_governor: performance > ucode: 0x5003003 > > test-description: Netperf is a benchmark that can be use to measure various aspect of networking performance. > test-url: http://www.netperf.org/netperf/ I'm very very sceptical this thing benchmarks #MC exception handler performance. Because the code this patch adds gets run only during a MCE exception. So unless I'm missing something obvious please check your setup. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============1785490636185337168==" MIME-Version: 1.0 From: Borislav Petkov To: lkp@lists.01.org Subject: Re: [x86/mce] 7bb39313cd: netperf.Throughput_tps -4.5% regression Date: Tue, 12 Jan 2021 15:14:38 +0100 Message-ID: <20210112141438.GF13086@zn.tnic> In-Reply-To: <20210112142109.GE30747@xsang-OptiPlex-9020> List-Id: --===============1785490636185337168== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable On Tue, Jan 12, 2021 at 10:21:09PM +0800, kernel test robot wrote: > = > Greeting, > = > FYI, we noticed a -4.5% regression of netperf.Throughput_tps due to commi= t: > = > = > commit: 7bb39313cd6239e7eb95198950a02b4ad2a08316 ("x86/mce: Make mce_time= d_out() identify holdout CPUs") > https://git.kernel.org/cgit/linux/kernel/git/tip/tip.git ras/core > = > = > in testcase: netperf > on test machine: 192 threads Intel(R) Xeon(R) Platinum 9242 CPU @ 2.30GHz= with 192G memory > with following parameters: > = > ip: ipv4 > runtime: 300s > nr_threads: 16 > cluster: cs-localhost > test: TCP_CRR > cpufreq_governor: performance > ucode: 0x5003003 > = > test-description: Netperf is a benchmark that can be use to measure vario= us aspect of networking performance. > test-url: http://www.netperf.org/netperf/ I'm very very sceptical this thing benchmarks #MC exception handler performance. Because the code this patch adds gets run only during a MCE exception. So unless I'm missing something obvious please check your setup. -- = Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette --===============1785490636185337168==--