From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263181AbTJUP57 (ORCPT ); Tue, 21 Oct 2003 11:57:59 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263184AbTJUP57 (ORCPT ); Tue, 21 Oct 2003 11:57:59 -0400 Received: from mail-04.iinet.net.au ([203.59.3.36]:46804 "HELO mail.iinet.net.au") by vger.kernel.org with SMTP id S263181AbTJUP55 (ORCPT ); Tue, 21 Oct 2003 11:57:57 -0400 Message-ID: <3F95577D.7070508@cyberone.com.au> Date: Wed, 22 Oct 2003 01:57:49 +1000 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.4) Gecko/20030827 Debian/1.4-3 X-Accept-Language: en MIME-Version: 1.0 To: rwhron@earthlink.net CC: venom@sns.it, linux-kernel@vger.kernel.org, dmo@osdl.org, akpm@osdl.org Subject: Re: [BENCHMARK] I/O regression after 2.6.0-test5 References: <20031021130501.GA4409@rushmore> In-Reply-To: <20031021130501.GA4409@rushmore> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org rwhron@earthlink.net wrote: >>If you have time, would you please try testing as-iosched.c from >>test5 in a later kernel (it won't go into test8-mm1 though). >> > >copying drivers/block/as-iosched.c from 2.6.0-test5 to test8 >looks like it fixes the regression. Here are the results so far. > >In the AIM7 database benchmark, jobs/minute using test5 as-iosched.c >doubled. At 32 tasks, jobs/min went from 300 to 601. >At 256 tasks, jobs/min went from 552 to 1010. > Yep, looks right. Thanks for your thoroughness. There are a few important direct IO bug fixes gone in there as well (hopefully they aren't causing the regressions... unlikely), so for stability you'll want to continue to use the test8 version. I'll get a patch out soon.