Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933041AbXB0MWF (ORCPT ); Tue, 27 Feb 2007 07:22:05 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933040AbXB0MWF (ORCPT ); Tue, 27 Feb 2007 07:22:05 -0500 Received: from relay.2ka.mipt.ru ([194.85.82.65]:33704 "EHLO 2ka.mipt.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933057AbXB0MWD (ORCPT ); Tue, 27 Feb 2007 07:22:03 -0500 Date: Tue, 27 Feb 2007 15:19:59 +0300 From: Evgeniy Polyakov To: Jens Axboe Cc: Suparna Bhattacharya , Ingo Molnar , linux-kernel@vger.kernel.org, Linus Torvalds , Arjan van de Ven , Christoph Hellwig , Andrew Morton , Alan Cox , Ulrich Drepper , Zach Brown , "David S. Miller" , Davide Libenzi , Thomas Gleixner Subject: Re: A quick fio test (was Re: [patch 00/13] Syslets, "Threadlets", generic AIO support, v3) Message-ID: <20070227121958.GB31597@2ka.mipt.ru> References: <20070223151515.GA12960@in.ibm.com> <20070223162508.GA16782@kernel.dk> <20070223171348.GA27838@in.ibm.com> <20070226135736.GF3822@kernel.dk> <20070226141315.GA15631@in.ibm.com> <20070226144548.GH3822@kernel.dk> <20070227043331.GA29942@in.ibm.com> <20070227094211.GR3822@kernel.dk> <20070227111258.GA19125@2ka.mipt.ru> <20070227112908.GB4271@kernel.dk> Mime-Version: 1.0 Content-Type: text/plain; charset=koi8-r Content-Disposition: inline In-Reply-To: <20070227112908.GB4271@kernel.dk> User-Agent: Mutt/1.5.9i X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-3.0 (2ka.mipt.ru [0.0.0.0]); Tue, 27 Feb 2007 15:20:37 +0300 (MSK) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1682 Lines: 57 On Tue, Feb 27, 2007 at 12:29:08PM +0100, Jens Axboe (jens.axboe@oracle.com) wrote: > On Tue, Feb 27 2007, Evgeniy Polyakov wrote: > > My two coins: > > # cat job > > [global] > > bs=8k > > size=1g > > direct=0 > > ioengine=sync > > iodepth=32 > > rw=read > > > > [file] > > filename=/home/user/test > > > > sync: > > READ: io=1,024MiB, aggrb=39,329KiB/s, minb=39,329KiB/s, > > maxb=39,329KiB/s, mint=27301msec, maxt=27301msec > > > > libaio: > > READ: io=1,024MiB, aggrb=39,435KiB/s, minb=39,435KiB/s, > > maxb=39,435KiB/s, mint=27228msec, maxt=27228msec > > > > syslet-rw: > > READ: io=1,024MiB, aggrb=29,567KiB/s, minb=29,567KiB/s, > > maxb=29,567KiB/s, mint=36315msec, maxt=36315msec > > > > During syslet-rw test about 9500 async schduledes happend. > > I use fio-git-20070226150114.tar.gz > > That looks pretty pathetic :-). What IO scheduler did you use? syslets > will confuse CFQ currently, so you want to compare with using eg > deadline or as. That is one of the downsides of this approach. Deadline shows this: sync: READ: io=1,024MiB, aggrb=38,212KiB/s, minb=38,212KiB/s, maxb=38,212KiB/s, mint=28099msec, maxt=28099msec libaio: READ: io=1,024MiB, aggrb=37,933KiB/s, minb=37,933KiB/s, maxb=37,933KiB/s, mint=28306msec, maxt=28306msec syslet-rw: READ: io=1,024MiB, aggrb=34,759KiB/s, minb=34,759KiB/s, maxb=34,759KiB/s, mint=30891msec, maxt=30891msec There were about 10k async schedulings. -- Evgeniy Polyakov - 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/