Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751376AbWAKF0a (ORCPT ); Wed, 11 Jan 2006 00:26:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751375AbWAKF0a (ORCPT ); Wed, 11 Jan 2006 00:26:30 -0500 Received: from smtp.osdl.org ([65.172.181.4]:59577 "EHLO smtp.osdl.org") by vger.kernel.org with ESMTP id S1751371AbWAKF03 (ORCPT ); Wed, 11 Jan 2006 00:26:29 -0500 Date: Tue, 10 Jan 2006 21:25:51 -0800 From: Andrew Morton To: cmm@us.ibm.com Cc: hch@lst.de, pbadari@us.ibm.com, sct@redhat.com, linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net Subject: Re: [PATCH 0/5] multiple block allocation to current ext3 Message-Id: <20060110212551.411a766d.akpm@osdl.org> In-Reply-To: <1136935562.4901.41.camel@dyn9047017067.beaverton.ibm.com> References: <1112673094.14322.10.camel@mindpipe> <1112765751.3874.14.camel@localhost.localdomain> <20050407081434.GA28008@elte.hu> <1112879303.2859.78.camel@sisko.sctweedie.blueyonder.co.uk> <1112917023.3787.75.camel@dyn318043bld.beaverton.ibm.com> <1112971236.1975.104.camel@sisko.sctweedie.blueyonder.co.uk> <1112983801.10605.32.camel@dyn318043bld.beaverton.ibm.com> <1113220089.2164.52.camel@sisko.sctweedie.blueyonder.co.uk> <1113244710.4413.38.camel@localhost.localdomain> <1113249435.2164.198.camel@sisko.sctweedie.blueyonder.co.uk> <1113288087.4319.49.camel@localhost.localdomain> <1113304715.2404.39.camel@sisko.sctweedie.blueyonder.co.uk> <1113348434.4125.54.camel@dyn318043bld.beaverton.ibm.com> <1113388142.3019.12.camel@sisko.sctweedie.blueyonder.co.uk> <1114207837.7339.50.camel@localhost.localdomain> <1114659912.16933.5.camel@mindpipe> <1114715665.18996.29.camel@localhost.localdomain> <1136935562.4901.41.camel@dyn9047017067.beaverton.ibm.com> X-Mailer: Sylpheed version 1.0.4 (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 Content-Length: 1177 Lines: 32 Mingming Cao wrote: > > Tests done so far includes fsx,tiobench and dbench. The following > numbers collected from Direct IO tests (1G file creation/read) shows > the system time have been greatly reduced (more than 50% on my 8 cpu > system) with the patches. > > 1G file DIO write: > 2.6.15 2.6.15+patches > real 0m31.275s 0m31.161s > user 0m0.000s 0m0.000s > sys 0m3.384s 0m0.564s > > > 1G file DIO read: > 2.6.15 2.6.15+patches > real 0m30.733s 0m30.624s > user 0m0.000s 0m0.004s > sys 0m0.748s 0m0.380s > > Some previous test we did on buffered IO with using multiple blocks > allocation and delayed allocation shows noticeable improvement on > throughput and system time. I'd be interested in seeing benchmark results for the common allocate-one-block case - just normal old buffered IO without any additional multiblock patches. Would they show any regression? - 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/