From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265932AbUEUTci (ORCPT ); Fri, 21 May 2004 15:32:38 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265923AbUEUTci (ORCPT ); Fri, 21 May 2004 15:32:38 -0400 Received: from [213.171.41.46] ([213.171.41.46]:23048 "EHLO kaamos.homelinux.net") by vger.kernel.org with ESMTP id S265932AbUEUTcg (ORCPT ); Fri, 21 May 2004 15:32:36 -0400 From: Alexey Kopytov Organization: MySQL AB To: Ram Pai Subject: Re: Random file I/O regressions in 2.6 [patch+results] Date: Fri, 21 May 2004 23:32:32 +0400 User-Agent: KMail/1.6.2 Cc: Andrew Morton , nickpiggin@yahoo.com.au, peter@mysql.com, linux-kernel@vger.kernel.org, axboe@suse.de References: <200405022357.59415.alexeyk@mysql.com> <200405200506.03006.alexeyk@mysql.com> <1085016663.2941.10.camel@dyn319009bld.beaverton.ibm.com> In-Reply-To: <1085016663.2941.10.camel@dyn319009bld.beaverton.ibm.com> MIME-Version: 1.0 Content-Disposition: inline Content-Type: text/plain; charset="koi8-r" Content-Transfer-Encoding: 7bit Message-Id: <200405212332.32522.alexeyk@mysql.com> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thursday 20 May 2004 05:31, Ram Pai wrote: >On Wed, 2004-05-19 18:06, Alexey Kopytov wrote: >> Ram, can you clarify the status of this patch please? >> >> I ran the same sysbench test on my hardware with patched 2.6.6 and got >> 122.2348s execution time, i.e. almost the same results as in the original >> tests. Is this patch an intermediate step to improve the sysbench workload >> on 2.6, or it just addresses another problem? > >this patch by itself does not address your problem. Your problem is >better addressed by Andrew's 'readahead-private' patch. > >However; this patch applied on top of Andrew's 'readahead-private' patch >may get you some extra performance. > >Can you confirm this please? Yes. 2.6.6-rc3 + Andrew's patch: Time spent for test: 86.5459s 2.6.6-bk: Time spent for test: 83.1929s Thanks for clarifying! -- Alexey Kopytov, Software Developer MySQL AB, www.mysql.com Are you MySQL certified? www.mysql.com/certification