From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264874AbTLKKS0 (ORCPT ); Thu, 11 Dec 2003 05:18:26 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264875AbTLKKS0 (ORCPT ); Thu, 11 Dec 2003 05:18:26 -0500 Received: from mail2.bluewin.ch ([195.186.4.73]:8073 "EHLO mail2.bluewin.ch") by vger.kernel.org with ESMTP id S264874AbTLKKSV (ORCPT ); Thu, 11 Dec 2003 05:18:21 -0500 Date: Thu, 11 Dec 2003 11:16:55 +0100 From: Roger Luethi To: Rik van Riel Cc: William Lee Irwin III , Con Kolivas , Chris Vine , linux-kernel@vger.kernel.org, "Martin J. Bligh" Subject: Re: 2.6.0-test9 - poor swap performance on low end machines Message-ID: <20031211101655.GB5192@k3.hellgate.ch> Mail-Followup-To: Rik van Riel , William Lee Irwin III , Con Kolivas , Chris Vine , linux-kernel@vger.kernel.org, "Martin J. Bligh" References: <20031210231729.GC28912@k3.hellgate.ch> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Operating-System: Linux 2.6.0-test11 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 Wed, 10 Dec 2003 20:31:40 -0500, Rik van Riel wrote: > Hmmm, those definitions have changed a little from the > OS books I read ;)) > > > - It is light thrashing when load control has no advantage. > > This used to be called "no thrashing" ;) Fair enough, but that was before Linux 2.6 . kbuild benchmark, execution time in seconds (median over ten runs): 74 2.6.0-test11, 256 MB RAM 115 2.4.21, 64 MB RAM 539 2.6.0-test11, 64 MB RAM We can call it lousy paging, that'll be fine with me. > Also, it would make the job of a load control mechanism > really easy to define: > > "Prevent the system from thrashing" "... once all other means are exhausted". Then I'll buy it. Roger