Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S938690AbZDJHgl (ORCPT ); Fri, 10 Apr 2009 03:36:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S939073AbZDJHeH (ORCPT ); Fri, 10 Apr 2009 03:34:07 -0400 Received: from moutng.kundenserver.de ([212.227.126.177]:54469 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S939065AbZDJHeF (ORCPT ); Fri, 10 Apr 2009 03:34:05 -0400 Date: Fri, 10 Apr 2009 09:34:50 +0200 From: Heinz Diehl To: Ingo Molnar Cc: Jan Kara , Linus Torvalds , Jens Axboe , "Theodore Ts'o" , Andrew Morton , Alan Cox , Arjan van de Ven , Peter Zijlstra , Nick Piggin , David Rees , Jesper Krogh , Linux Kernel Mailing List , Oleg Nesterov , Roland McGrath Subject: Re: updated: ext3 IO latency measurements on v2.6.30-rc1 Message-ID: <20090410073450.GA6505@fancy-poultry.org> References: <20090325123744.GK23439@duck.suse.cz> <20090325150041.GM32307@mit.edu> <20090325185824.GO32307@mit.edu> <20090325215137.GQ32307@mit.edu> <20090325235041.GA11024@duck.suse.cz> <20090326090630.GA9369@elte.hu> <20090409215946.GA28183@elte.hu> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20090409215946.GA28183@elte.hu> Organization: private site User-Agent: Mutt/1.5.19+20090405 (GNU/Linux) X-Provags-ID: V01U2FsdGVkX1/iOPZqJp4EhKtC1Y+IjbbPHy60xJSa8tWAIDK i/it0cJ2ABWx8+lUJ06b2Uj6JF6+unC7ONy0do8dUUlr+ry9vi OAbX28FzuyZ5P3yqmu5VaqNB33aw1IE Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2185 Lines: 93 On 10.04.2009, Ingo Molnar wrote: > This is an update to the ext3+CFQ latency measurements i did early > in the merge window - originally with a v2.6.29 based kernel. > > Today i've repeated my measurements under v2.6.30-rc1, using the > exact same system and the exact same workload. > > The quick executive summary: > > _what a difference a week of upstream development makes_! Here's a quicktest with xfs+CFQ on one of my testing machines, using fsync-tester while running Linus' "bigfile torture test". It underlines your results, showing significant improvement! The xfs partition is mounted with the defaults, and I'm expecting slightly more improvement after mounting with noatime and nobarrier. 2.6.30-rc1 fsync time: 0.4674 fsync time: 1.0473 fsync time: 0.4190 fsync time: 1.0800 fsync time: 1.0132 fsync time: 1.0193 fsync time: 1.0191 fsync time: 1.1318 fsync time: 0.9924 fsync time: 1.0568 fsync time: 1.0676 fsync time: 1.0241 fsync time: 1.0530 fsync time: 0.9709 fsync time: 0.4475 fsync time: 0.6320 fsync time: 1.0906 fsync time: 0.6344 fsync time: 1.0632 fsync time: 1.0455 fsync time: 1.0530 fsync time: 1.0655 fsync time: 1.0032 fsync time: 1.0644 fsync time: 1.1573 fsync time: 1.0197 fsync time: 1.0342 fsync time: 1.0643 fsync time: 0.0342 fsync time: 0.7603 fsync time: 1.0905 fsync time: 0.6340 2.6.29.1 fsync time: 2.1255 fsync time: 2.2851 fsync time: 1.9048 fsync time: 1.0999 fsync time: 2.0117 fsync time: 2.0819 fsync time: 2.0819 fsync time: 0.0225 fsync time: 0.2796 fsync time: 0.3879 fsync time: 0.6584 fsync time: 0.9287 fsync time: 0.2488 fsync time: 2.0994 fsync time: 2.0161 fsync time: 1.9736 fsync time: 2.0231 fsync time: 2.2888 fsync time: 2.1719 fsync time: 1.8452 fsync time: 0.3278 fsync time: 1.0881 fsync time: 0.5202 fsync time: 1.3339 fsync time: 0.4295 fsync time: 1.2772 fsync time: 1.9436 fsync time: 2.1048 fsync time: 1.9376 fsync time: 2.0786 fsync time: 1.9202 -- 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/