From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263229AbTJaL2V (ORCPT ); Fri, 31 Oct 2003 06:28:21 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263241AbTJaL2V (ORCPT ); Fri, 31 Oct 2003 06:28:21 -0500 Received: from mail2.bluewin.ch ([195.186.4.73]:45988 "EHLO mail2.bluewin.ch") by vger.kernel.org with ESMTP id S263229AbTJaL2U (ORCPT ); Fri, 31 Oct 2003 06:28:20 -0500 Date: Fri, 31 Oct 2003 12:26:15 +0100 From: Roger Luethi To: Rik van Riel Cc: Chris Vine , linux-kernel@vger.kernel.org, Con Kolivas Subject: Re: 2.6.0-test9 - poor swap performance on low end machines Message-ID: <20031031112615.GA10530@k3.hellgate.ch> Mail-Followup-To: Rik van Riel , Chris Vine , linux-kernel@vger.kernel.org, Con Kolivas References: <200310292230.12304.chris@cvine.freeserve.co.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Operating-System: Linux 2.6.0-test9 on i686 X-GPG-Fingerprint: 92 F4 DC 20 57 46 7B 95 24 4E 9E E7 5A 54 DC 1B X-GPG: 1024/80E744BD wwwkeys.ch.pgp.net User-Agent: Mutt/1.5.4i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 30 Oct 2003 22:57:23 -0500, Rik van Riel wrote: > On Wed, 29 Oct 2003, Chris Vine wrote: > > > However, on a low end machine (200MHz Pentium MMX uniprocessor with only 32MB > > of RAM and 70MB of swap) I get poor performance once extensive use is made of > > the swap space. > > Could you try the patch Con Kolivas posted on the 25th ? > > Subject: [PATCH] Autoregulate vm swappiness cleanup I suppose it will show some improvement but fail to get performance anywhere near 2.4 -- at least that's what my own tests found. I've been working on a break-down of where we're losing it. Bottom line: It's not simply a price we pay for feature X or Y. It's all over the map, and thus no single patch can possibly fix it. Roger