Received: by 2002:a25:1985:0:0:0:0:0 with SMTP id 127csp867117ybz; Sat, 25 Apr 2020 06:05:38 -0700 (PDT) X-Google-Smtp-Source: APiQypIN1r6ruGYzceDno+fhoQXltdrb/nk08lMon/Qfdx6pkp4myAOUihRfZ3N7CotYCAm4/XfA X-Received: by 2002:a50:ec95:: with SMTP id e21mr11494805edr.253.1587819938442; Sat, 25 Apr 2020 06:05:38 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1587819938; cv=none; d=google.com; s=arc-20160816; b=T4jLYClDnKjKr26zps9X873Dh9EmNeNZ3RLmumow0cmDP8vTTCHcMYxz43GJgvA0Ks xJFe/bs9OjN3syayzZxCbd3QtrlYNQqAskk5TBv0iPiLcSA6qYNk418BAsHkfQ8isUCS 8gWKExUe4+Evqf2f98Hm9O7KBn7dugt1Lsh8C/lSLgaUh7m7osXgRZo3YgNba/q7otYC avO6UZq8syb6zVgE+koSu7mKR4s4FrCIb9QUfL8rWaTEhJ7Bco+GzTtUDyxYycYc4J+d dvq+OmGls5D5RcRpRbh1UB7O4nwZ+qx7NECoaOlRZ8R+7CA2aCzRG8Wdu64CA3BIaqW5 cjjQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-transfer-encoding:content-disposition:mime-version :references:message-id:subject:cc:to:from:date; bh=ptyaVoU72waPeowDWBgBKst/gaLaZciVvwXVpJO21Hc=; b=E0ec7ZPJGzFiz6ekPZjkRCGnooIbcMwoTh9LvAeKQcIurMDLxTk1U1OcXCCtWC3D4p Rb60n49lzJxjmnTvyCBmPwyJBhr70tmXlpLvcvgAQRzD5NUTXgs9F1eOdEI8duFXv1ub 3IKpehUDGB59nxFLCn+atKUVckx1DgVdTyZFoU4naOMnU5VrHcwgyZYF1TLqCitwhlxw SstOieC4UXx8/KS4pF/wZ87wSQaBRSZRPNkQAkSNk6X/yLLcfgRUb5QtCNbbQdshb08F 7KyuhFSrlotXCEJlIrTOw45TPQnOvO6R0HEKCCnmNoDGpXruoZN5mgrLNz08zVzk/v92 Dzrg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id e15si5063915ejc.208.2020.04.25.06.05.12; Sat, 25 Apr 2020 06:05:38 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726112AbgDYNBs (ORCPT + 99 others); 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