From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754352AbXD3McP (ORCPT ); Mon, 30 Apr 2007 08:32:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755229AbXD3McO (ORCPT ); Mon, 30 Apr 2007 08:32:14 -0400 Received: from brick.kernel.dk ([80.160.20.94]:10400 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755204AbXD3McN (ORCPT ); Mon, 30 Apr 2007 08:32:13 -0400 Date: Mon, 30 Apr 2007 14:27:53 +0200 From: Jens Axboe To: "Alan D. Brunelle" Cc: linux-kernel@vger.kernel.org Subject: Re: CFQ IO scheduler patch series - AIM7 DBase results on a 16-way IA64 Message-ID: <20070430122753.GL21015@kernel.dk> References: <4635D59C.4050300@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4635D59C.4050300@hp.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Apr 30 2007, Alan D. Brunelle wrote: > The results from a single run of an AIM7 DBase load on a 16-way ia64 box > (64GB RAM + 144 FC disks) showed a slight regression (~0.5%) by adding > in this patch. (Graph can be found at > http://free.linux.hp.com/~adb/cfq/cfq_dbase.png ) It is only a single > set of runs, on a single platform, but it is something to keep an eye on > as the regression showed itself across the complete run. Do you know if this regression is due to worse IO performance, or increased system CPU usage? -- Jens Axboe