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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,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 EE8D5CA9EAF for ; Sun, 27 Oct 2019 16:32:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A96AF20873 for ; Sun, 27 Oct 2019 16:32:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=firstfloor.org header.i=@firstfloor.org header.b="Q3F5MO7X" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727213AbfJ0Qc4 (ORCPT ); Sun, 27 Oct 2019 12:32:56 -0400 Received: from one.firstfloor.org ([193.170.194.197]:43404 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726838AbfJ0Qc4 (ORCPT ); Sun, 27 Oct 2019 12:32:56 -0400 Received: by one.firstfloor.org (Postfix, from userid 503) id BCCEF868A0; Sun, 27 Oct 2019 17:32:50 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=firstfloor.org; s=mail; t=1572193970; bh=Qy2BzbwNudZ+K/M+aELzPmKqbE47rBv9XJrJ+gnJi3M=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Q3F5MO7Xcn3BCGNZn1vmupgXeQm3s0wHP5aWbVjhFEGf8Qwz3EIhygQL/I0HKVSMt WFwEPSut/cpsepflfcWbxLZhiPNgrSeyx1+lsVenV9KGhEyz2ipWSHLCULIuB0nar7 rCi+uYn1JrgxL+MWHOXFb/tRMlRedywFpulB34g8= Date: Sun, 27 Oct 2019 09:32:50 -0700 From: Andi Kleen To: kernel test robot Cc: Peter Zijlstra , mingo@kernel.org, linux-kernel@vger.kernel.org, acme@kernel.org, mark.rutland@arm.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, namhyung@kernel.org, andi@firstfloor.org, kan.liang@linux.intel.com, lkp@lists.01.org Subject: Re: [perf] 06e0dbcfd3: phoronix-test-suite.mbw.0.mib_s 12.6% improvement Message-ID: <20191027163248.nv63uybzjstoigj5@two.firstfloor.org> References: <20191022092307.425783389@infradead.org> <20191027051812.GJ29418@shao2-debian> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20191027051812.GJ29418@shao2-debian> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Sun, Oct 27, 2019 at 01:18:12PM +0800, kernel test robot wrote: > Greeting, > > FYI, we noticed a 12.6% improvement of phoronix-test-suite.mbw.0.mib_s due to commit: Wow! Sadly it's a false positive, from lowering perf overhead, instead of improving the workload. Still seems like a good thing. Note that there is a perf user tool change coming soon that will likely improve it even more (using affiity to optimize all perf IPIs). -Andi