Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932507AbXBWPEs (ORCPT ); Fri, 23 Feb 2007 10:04:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932480AbXBWPEs (ORCPT ); Fri, 23 Feb 2007 10:04:48 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:37586 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932507AbXBWPEr (ORCPT ); Fri, 23 Feb 2007 10:04:47 -0500 Date: Fri, 23 Feb 2007 15:58:26 +0100 From: Ingo Molnar To: Suparna Bhattacharya Cc: Jens Axboe , linux-kernel@vger.kernel.org, Linus Torvalds , Arjan van de Ven , Christoph Hellwig , Andrew Morton , Alan Cox , Ulrich Drepper , Zach Brown , Evgeniy Polyakov , "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: <20070223145826.GA32465@elte.hu> References: <20070221211355.GA7302@elte.hu> <20070223125247.GO5737@kernel.dk> <20070223135525.GA31569@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070223135525.GA31569@in.ibm.com> User-Agent: Mutt/1.4.2.2i X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -2.0 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-2.0 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.1.7 -2.0 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 952 Lines: 32 * Suparna Bhattacharya wrote: > As a really crude (and not very realistic) example of the potential > impact of large numbers of outstanding IOs, I tried some quick direct > IO comparisons using fio: > > [global] > ioengine=syslet-rw > buffered=0 > rw=randread > bs=64k > size=1024m > iodepth=64 could you please try those iodepth=20000 tests with the latest fio-testing branch of fio as well? Jens wrote a new, smarter syslet plugin for FIO. You'll need the v3 syslet kernel plus: git-clone git://git.kernel.dk/data/git/fio.git cd fio git-checkout syslet-testing my expectation is that it should behave better with iodepth=20000 (although i havent tried that yet). Ingo - 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/