From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262113AbULCJ1V (ORCPT ); Fri, 3 Dec 2004 04:27:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262116AbULCJ1V (ORCPT ); Fri, 3 Dec 2004 04:27:21 -0500 Received: from fw.osdl.org ([65.172.181.6]:2781 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S262113AbULCJ1S (ORCPT ); Fri, 3 Dec 2004 04:27:18 -0500 Date: Fri, 3 Dec 2004 01:26:45 -0800 From: Andrew Morton To: "Prakash K. Cheemplavam" Cc: axboe@suse.de, linux-kernel@vger.kernel.org, nickpiggin@yahoo.com.au Subject: Re: Time sliced CFQ io scheduler Message-Id: <20041203012645.21377669.akpm@osdl.org> In-Reply-To: <41B02DFD.9090503@gmx.de> References: <20041202130457.GC10458@suse.de> <20041202134801.GE10458@suse.de> <20041202114836.6b2e8d3f.akpm@osdl.org> <20041202195232.GA26695@suse.de> <20041202121938.12a9e5e0.akpm@osdl.org> <41AF94B8.8030202@gmx.de> <20041203070108.GA10492@suse.de> <41B02DFD.9090503@gmx.de> X-Mailer: Sylpheed version 0.9.7 (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "Prakash K. Cheemplavam" wrote: > > > Can you try with the patch that is in the parent of this thread? The > > above doesn't look that bad, although read performance could be better > > of course. But try with the patch please, I'm sure it should help you > > quite a lot. > > > > It actually got worse: Though the read rate seems accepteble, it is not, as > interactivity is dead while writing. Is this a parallel IDE system? SATA? SCSI? If the latter, what driver and what is the TCQ depth?