From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263752AbTDUBcc (ORCPT ); Sun, 20 Apr 2003 21:32:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263753AbTDUBcc (ORCPT ); Sun, 20 Apr 2003 21:32:32 -0400 Received: from adsl-66-120-100-11.dsl.sndg02.pacbell.net ([66.120.100.11]:5903 "HELO glacier.arctrix.com") by vger.kernel.org with SMTP id S263752AbTDUBcb (ORCPT ); Sun, 20 Apr 2003 21:32:31 -0400 Date: Sun, 20 Apr 2003 18:46:04 -0700 From: Neil Schemenauer To: Marc-Christian Petersen Cc: Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: [PATCH][CFT] new IO scheduler for 2.4.20 Message-ID: <20030421014603.GA18971@glacier.arctrix.com> References: <20030417172818.GA8848@glacier.arctrix.com> <20030417134103.4e69fc1b.akpm@digeo.com> <20030420182648.GA18120@glacier.arctrix.com> <200304210006.23762.m.c.p@wolk-project.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200304210006.23762.m.c.p@wolk-project.de> User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Marc-Christian Petersen wrote: > what about i/o throughput, bonnie or such? bonnie++ Version 1.03 ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP 2.4.20 1G 36236 18 13423 7 29948 11 210.1 0 2.4.20-nas1 1G 35998 18 12076 7 19056 9 206.7 0 2.4.20-nas2 1G 37450 18 12101 7 19363 9 210.7 0 Read throughput has definitely taken a hit. I don't know why. Perhaps the elevator needs to have a little more relaxed definition of contiguous requests. Right now it only puts requests together if they are perfectly contiguous (the first sector in one request is the next after the last sector of another). I'll try to test that. Any other theories? Neil