From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752812AbYJBDn2 (ORCPT ); Wed, 1 Oct 2008 23:43:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751067AbYJBDnV (ORCPT ); Wed, 1 Oct 2008 23:43:21 -0400 Received: from casper.infradead.org ([85.118.1.10]:36148 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750948AbYJBDnU (ORCPT ); Wed, 1 Oct 2008 23:43:20 -0400 Date: Wed, 1 Oct 2008 20:43:11 -0700 From: Arjan van de Ven To: auntvini@cel.usyd.edu.au Cc: linux-kernel@vger.kernel.org Subject: Re: Division of Load Average Message-ID: <20081001204311.241e04e5@infradead.org> In-Reply-To: <7971648.51222945125819.JavaMail.root@wombat.diezmil.com> References: <7971648.51222945125819.JavaMail.root@wombat.diezmil.com> Organization: Intel X-Mailer: Claws Mail 3.5.0 (GTK+ 2.12.12; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2 Oct 2008 06:58:45 -0400 auntvini@cel.usyd.edu.au wrote: > My self and my superviosr Dr David Levy have been working on > introduction of new kernel code to correct the inherent problem of > calculating load avarage by the current kernel. We have posted many > e-mails in this regard since 2003 and kernel has been updated under > the supervision of Rusty Russel. > > Also we had interactions with IBM group(balbir@in.ibm.com) who was > engaged in delayed stat calculations. > > We emphasise the following facts > (1) seperation of Disk IO load from CPU load > > This comes as a correction to the existing kernel as the calculation > of the existing kernel load average is based on the arithmatic > addition of Disk IO and CPU loads while you can argue if including disk makes sense or not, it's 20+ years of tradition on Linux, and more on Unix. So.. whatever you do (and I think there's some sense in splitting things out).. please only *add* stats, don't replace the existing ones. -- Arjan van de Ven Intel Open Source Technology Centre For development, discussion and tips for power savings, visit http://www.lesswatts.org