Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751400AbaLODOA (ORCPT ); Sun, 14 Dec 2014 22:14:00 -0500 Received: from cn.fujitsu.com ([59.151.112.132]:52443 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750810AbaLODNy convert rfc822-to-8bit (ORCPT ); Sun, 14 Dec 2014 22:13:54 -0500 X-IronPort-AV: E=Sophos;i="5.04,848,1406563200"; d="scan'208";a="45148821" Message-ID: <548E4E31.6050405@cn.fujitsu.com> Date: Mon, 15 Dec 2014 10:57:53 +0800 From: Gu Zheng User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110930 Thunderbird/7.0.1 MIME-Version: 1.0 To: Huang Ying CC: Benjamin LaHaise , LKML , LKP ML Subject: Re: [LKP] [aio] 6098b45b32e: 2200.00% xfstests.generic.239.seconds References: <1418605329.5745.141.camel@linux.intel.com> In-Reply-To: <1418605329.5745.141.camel@linux.intel.com> Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8BIT X-Originating-IP: [10.167.226.100] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Huang, On 12/15/2014 09:02 AM, Huang Ying wrote: > FYI, we noticed the below changes on > > commit 6098b45b32e6baeacc04790773ced9340601d511 ("aio: block exit_aio() until all context requests are completed") This patch added a wait step (which is lacked before) for all submitted aio missions (iocbs) to complete in exit_aio(), so the cost-time increasing is expected. Thanks, Gu > > > testbox/testcase/testparams: vm-vp-2G/xfstests/4HDD-btrfs-generic-quick > > 2ff396be602f10b5 6098b45b32e6baeacc04790773 > ---------------- -------------------------- > %stddev %change %stddev > \ | \ > 26352 ? 9% -13.6% 22774 ? 1% vmstat.system.cs > 10342 ? 6% -12.3% 9066 ? 0% vmstat.system.in > 37 ? 4% -12.1% 32 ? 3% time.percent_of_cpu_this_job_got > 1197 ? 2% -14.2% 1028 ? 0% vmstat.io.bi > 18470 ? 2% -10.1% 16609 ? 1% vmstat.io.bo > 157 ? 3% +13.7% 179 ? 0% time.elapsed_time > > vm-vp-2G: qemu-system-x86_64 -enable-kvm -cpu Penryn > Memory: 2G > > xfstests.generic.239.seconds > > 30 ++-----------O---------------------------------------------------------+ > | O O O O | > 25 ++ O | > | O O O O O O O O O O O O | > | O | > 20 O+ | > | | > 15 ++ | > | | > 10 ++ | > | | > | | > 5 ++ | > | | > 0 *+-*-*--*-*--*-*--*-*--*-*--*-*--*--*-*--*-*--*-*--*-*--*-*--*-*--*-*--* > > > [*] bisect-good sample > [O] bisect-bad sample > > To reproduce: > > apt-get install ruby ruby-oj > git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git > cd lkp-tests > bin/setup-local job.yaml # the job file attached in this email > bin/run-local job.yaml > > > Disclaimer: > Results have been estimated based on internal Intel analysis and are provided > for informational purposes only. Any difference in system hardware or software > design or configuration may affect actual performance. > > > Thanks, > Fengguang > > > > > _______________________________________________ > LKP mailing list > LKP@linux.intel.com > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/