From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265530AbUBAXxJ (ORCPT ); Sun, 1 Feb 2004 18:53:09 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265531AbUBAXxJ (ORCPT ); Sun, 1 Feb 2004 18:53:09 -0500 Received: from mail-03.iinet.net.au ([203.59.3.35]:27360 "HELO mail.iinet.net.au") by vger.kernel.org with SMTP id S265530AbUBAXw4 (ORCPT ); Sun, 1 Feb 2004 18:52:56 -0500 Message-ID: <401D9154.9060903@cyberone.com.au> Date: Mon, 02 Feb 2004 10:52:52 +1100 From: Nick Piggin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6) Gecko/20040122 Debian/1.6-1 X-Accept-Language: en MIME-Version: 1.0 To: Andrew Morton CC: Philip Martin , linux-kernel@vger.kernel.org Subject: Re: 2.6.1 slower than 2.4, smp/scsi/sw-raid/reiserfs References: <87oesieb75.fsf@codematters.co.uk> <20040201151111.4a6b64c3.akpm@osdl.org> In-Reply-To: <20040201151111.4a6b64c3.akpm@osdl.org> 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 Andrew Morton wrote: >Philip Martin wrote: > >>The machine is a dual P3 450MHz, 512MB, aic7xxx, 2 disk RAID-0 and >> ReiserFS. It's a few years old and has always run Linux, most >> recently 2.4.24. I decided to try 2.6.1 and the performance is >> disappointing. >> > >2.6 has a few performance problems under heavy pageout at present. Nick >Piggin has some patches which largely fix it up. > > >> My test is a software build of about 200 source files (written in C) >> that I usually build using "nice make -j4". >> > >Tried -j3? > > Its got 512MB RAM though so its not swapping, is it? Philip, can you please send about 30 seconds of vmstat 1 output for 2.4 and 2.6 while the test is running. Thanks