From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754008AbaHVBwo (ORCPT ); Thu, 21 Aug 2014 21:52:44 -0400 Received: from mga11.intel.com ([192.55.52.93]:38267 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753227AbaHVBwn (ORCPT ); Thu, 21 Aug 2014 21:52:43 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.04,377,1406617200"; d="scan'208";a="580186027" Date: Fri, 22 Aug 2014 09:52:23 +0800 From: Fengguang Wu To: "Theodore Ts'o" Cc: linux-ext4@vger.kernel.org, LKML , lkp@01.org Subject: Re: [ext4] 71d4f7d0321: -49.6% xfstests.generic.274.seconds Message-ID: <20140822015223.GA11430@localhost> References: <20140821143006.GA19943@localhost> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20140821143006.GA19943@localhost> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Aug 21, 2014 at 10:30:06PM +0800, Fengguang Wu wrote: > Hi Ted, > > We noticed increased xfstests 274's test speed and the first good > commit is 71d4f7d032149b935a26eb3ff85c6c837f3714e1 ("ext4: remove > metadata reservation checks"). > > test case: snb-drag/xfstests/4HDD-ext4-generic-slow2 > snb-drag is a Sandy Bridge PC with 6G memory. > > d5e03cbb0c88cd1 71d4f7d032149b935a26eb3ff > --------------- ------------------------- > 51 ± 2% -49.6% 25 ± 1% TOTAL xfstests.generic.274.seconds > 817 ± 1% -3.0% 792 ± 1% TOTAL time.elapsed_time > > xfstests.generic.274.seconds > > 60 ++---------------------------------------------------------------------+ > | | > 55 ++ .*..*.. *.. *.. | > | .*. . .. .. | > 50 *+.*..*. *..*..*..* *..*..*..*..* * | > | | > 45 ++ | > | | > 40 ++ | > | | > 35 ++ | > | | > 30 ++ | > | | > 25 O+-O--O--O--O--O---O--O--O--O--O--O--O--O--O--O--O--O---O--O--O--O--O--O > > > [*] bisect-good sample > [O] bisect-bad sample This is sweet, got another improvement: testbox/testcase/testparams: snb-drag/xfstests/4HDD-ext4-generic-mid d5e03cbb0c88cd1 71d4f7d032149b935a26eb3ff --------------- ------------------------- 45 ± 4% -50.2% 22 ± 7% xfstests.generic.256.seconds 7044859 ± 2% -7.0% 6553446 ± 0% time.minor_page_faults 36156 ± 2% -7.0% 33638 ± 0% time.involuntary_context_switches 171551 ± 1% -4.8% 163312 ± 0% time.voluntary_context_switches 436 ± 1% -5.7% 411 ± 0% time.elapsed_time time.voluntary_context_switches 176000 ++-----------------------------------------------------------------+ | * *.. *.. | 174000 ++ *.. .. : : *..* : * | 172000 ++ .. .*.* : : + : + | *..*..* *. : : + : + .* | 170000 ++ : .* * *. | 168000 ++ *. | | | 166000 ++ | 164000 ++ O O | | O O O O O O O O O O O 162000 ++ O O O O O O | 160000 O+ O O | | O O | 158000 ++-----------------------------------------------------------------+ xfstests.generic.256.seconds 60 ++-----------------------------*---------------------------------------+ | : : | 55 ++ : : | 50 ++ : : | | .*.. .* : .*.. | 45 *+ *.. .*..*...*..*..*. : .*. .*.. .* | | *. *. *. *. | 40 ++ | | | 35 ++ | 30 ++ | | | 25 ++ O O | O O O O O O O O O O O O O | 20 ++----O--------O---------O--O--O-----O-----O-----O---------------------O Thanks, Fengguang