Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030247AbXBZN7l (ORCPT ); Mon, 26 Feb 2007 08:59:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030246AbXBZN7l (ORCPT ); Mon, 26 Feb 2007 08:59:41 -0500 Received: from agminet01.oracle.com ([141.146.126.228]:41449 "EHLO agminet01.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1030247AbXBZN7j (ORCPT ); Mon, 26 Feb 2007 08:59:39 -0500 Date: Mon, 26 Feb 2007 14:57:36 +0100 From: Jens Axboe To: Suparna Bhattacharya Cc: Ingo Molnar , 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: <20070226135736.GF3822@kernel.dk> References: <20070221211355.GA7302@elte.hu> <20070223125247.GO5737@kernel.dk> <20070223135525.GA31569@in.ibm.com> <20070223145826.GA32465@elte.hu> <20070223151515.GA12960@in.ibm.com> <20070223162508.GA16782@kernel.dk> <20070223171348.GA27838@in.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070223171348.GA27838@in.ibm.com> X-Brightmail-Tracker: AAAAAQAAAAI= X-Whitelist: TRUE Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1761 Lines: 44 Some more results, using a larger number of processes and io depths. A repeat of the tests from friday, with added depth 20000 for syslet and libaio: Engine Depth Processes Bw (MiB/sec) ---------------------------------------------------- libaio 1 1 602 syslet 1 1 759 sync 1 1 776 libaio 32 1 832 syslet 32 1 898 libaio 20000 1 581 syslet 20000 1 609 syslet still on top. Measuring O_DIRECT reads (of 4kb size) on ramfs with 100 processes each with a depth of 200, reading a per-process private file of 10mb (need to fit in my ram...) 10 times each. IOW, doing 10,000MiB of IO in total: Engine Depth Processes Bw (MiB/sec) ---------------------------------------------------- libaio 200 100 1488 syslet 200 100 1714 Results are stable to within approx +/- 10MiB/sec. The syslet case completes a whole second faster than libaio (~6 vs ~7 seconds). Testing was done with fio HEAD eb7c8ae27bc301b77490b3586dd5ccab7c95880a, and it uses the v4 patch series. Engine Depth Processes Bw (MiB/sec) ---------------------------------------------------- libaio 200 100 1488 syslet 200 100 1714 sync 200 100 1843 -- Jens Axboe - 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/