From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265653AbUBBI7D (ORCPT ); Mon, 2 Feb 2004 03:59:03 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265654AbUBBI7D (ORCPT ); Mon, 2 Feb 2004 03:59:03 -0500 Received: from mail-06.iinet.net.au ([203.59.3.38]:43458 "HELO mail.iinet.net.au") by vger.kernel.org with SMTP id S265653AbUBBI67 (ORCPT ); Mon, 2 Feb 2004 03:58:59 -0500 Message-ID: <401E1131.6030608@cyberone.com.au> Date: Mon, 02 Feb 2004 19:58:25 +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: Philip Martin CC: Andrew Morton , 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> <401D9154.9060903@cyberone.com.au> <87llnm482q.fsf@codematters.co.uk> <401DDCD7.3010902@cyberone.com.au> In-Reply-To: <401DDCD7.3010902@cyberone.com.au> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Nick Piggin wrote: > > > Philip Martin wrote: > >> Nick Piggin writes: >> >> >>> Its got 512MB RAM though so its not swapping, is it? >>> >> >> No, it's not swapping. >> >> >>> Philip, can you please send about 30 seconds of vmstat 1 >>> output for 2.4 and 2.6 while the test is running. Thanks >>> >> >> OK. I rebooted, logged in, shutdown the network, ran find to fill the >> memory, then did make clean, make -j4, make clean, make -j4. The >> vmstat numbers are for the middle of the second make -j4. I'm using >> Debian's procps 3.1.15-1. >> >> >> 2.4.24 >> >> procs -----------memory---------- ---swap-- -----io---- --system-- >> ----cpu---- >> r b swpd free buff cache si so bi bo in cs us >> sy id wa >> 2 2 0 13848 95012 304080 0 0 0 976 263 811 84 >> 16 0 0 > snip >> 2.6.1 >> >> procs -----------memory---------- ---swap-- -----io---- --system-- >> ----cpu---- >> r b swpd free buff cache si so bi bo in cs us >> sy id wa >> 5 0 0 25528 241032 44500 0 0 0 0 1020 1315 63 >> 37 0 0 >> snip Another thing I just saw - you've got quite a lot of memory in buffers which might be something going wrong. When the build finishes and there is no other activity, can you try applying anonymous memory pressure until it starts swapping to see if everything gets reclaimed properly? Was each kernel freshly booted and without background activity before each compile? Thanks