From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759575AbXKPQk7 (ORCPT ); Fri, 16 Nov 2007 11:40:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752894AbXKPQkw (ORCPT ); Fri, 16 Nov 2007 11:40:52 -0500 Received: from g1t0026.austin.hp.com ([15.216.28.33]:42832 "EHLO g1t0026.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751946AbXKPQkw (ORCPT ); Fri, 16 Nov 2007 11:40:52 -0500 Message-ID: <473DC804.1000201@hp.com> Date: Fri, 16 Nov 2007 11:40:36 -0500 From: "Alan D. Brunelle" User-Agent: Thunderbird 2.0.0.6 (X11/20071022) MIME-Version: 1.0 To: Andrew Morton Cc: Rik van Riel , arjan@infradead.org, jens.axboe@oracle.com, mingo@elte.hu, linux-kernel@vger.kernel.org Subject: Re: [patch] Give kjournald a IOPRIO_CLASS_RT io priority References: <20071015104647.14e60bc5@laptopd505.fenrus.org> <20071015114738.6b5a25c7.akpm@linux-foundation.org> <20071015161315.4fe18e07@bree.surriel.com> <20071015141236.62b075c6.akpm@linux-foundation.org> <473B18BA.5000709@hp.com> <20071114091451.d4b110db.akpm@linux-foundation.org> <473DC496.6010805@hp.com> In-Reply-To: <473DC496.6010805@hp.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Alan D. Brunelle wrote: > > Read large file: > > Kernel Min Avg Max Std Dev %user %system %iowait > -------------------------------------------------------------- > base : 201.6 215.1 275.5 22.8 0.26% 4.69% 33.54% > arjan: 198.0 210.3 261.5 18.5 0.33% 10.24% 54.00% > > Read a tree: > > Kernel Min Avg Max Std Dev %user %system %iowait > -------------------------------------------------------------- > base : 3518.2 4631.3 5991.3 784.6 0.19% 3.29% 23.56% > arjan: 5731.6 6849.8 7777.4 731.6 0.32% 9.90% 52.70% > > Overwrite large file: > > Kernel Min Avg Max Std Dev %user %system %iowait > -------------------------------------------------------------- > base : 104.2 147.7 239.5 38.4 0.02% 0.05% 1.08% > arjan: 106.2 149.7 239.2 38.4 0.25% 0.79% 14.97% > > I'm going to try and do some clean up work on the iostat CPU results - the reason %user & %system are so low is (I think) because they also include a lot of 0% results from the tail of the runs (as the unmount is going on I think). I'm going to try and extract results for just the "meat" of the runs. Alan