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=-2.2 required=3.0 tests=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 619A8C54FCB for ; Sat, 25 Apr 2020 13:01:49 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 443BB20704 for ; Sat, 25 Apr 2020 13:01:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726135AbgDYNBs (ORCPT ); Sat, 25 Apr 2020 09:01:48 -0400 Received: from mx2.suse.de ([195.135.220.15]:45642 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726076AbgDYNBs (ORCPT ); Sat, 25 Apr 2020 09:01:48 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 6EEC2AD57; Sat, 25 Apr 2020 13:01:46 +0000 (UTC) Date: Sat, 25 Apr 2020 15:01:36 +0200 From: Borislav Petkov To: kernel test robot Cc: Tony Luck , LKML , lkp@lists.01.org Subject: Re: [x86/mce] 1de08dccd3: will-it-scale.per_process_ops -14.1% regression Message-ID: <20200425130136.GA28245@zn.tnic> References: <20200425114414.GU26573@shao2-debian> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200425114414.GU26573@shao2-debian> User-Agent: Mutt/1.10.1 (2018-07-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sat, Apr 25, 2020 at 07:44:14PM +0800, kernel test robot wrote: > Greeting, > > FYI, we noticed a -14.1% regression of will-it-scale.per_process_ops due to commit: > > > commit: 1de08dccd383482a3e88845d3554094d338f5ff9 ("x86/mce: Add a struct mce.kflags field") I don't see how a struct mce member addition will cause any performance regression. Please check your test case. Thx. -- Regards/Gruss, Boris. SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg