From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267368AbUHTRE2 (ORCPT ); Fri, 20 Aug 2004 13:04:28 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268333AbUHTRE2 (ORCPT ); Fri, 20 Aug 2004 13:04:28 -0400 Received: from mx2.elte.hu ([157.181.151.9]:58770 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S267368AbUHTREX (ORCPT ); Fri, 20 Aug 2004 13:04:23 -0400 Date: Fri, 20 Aug 2004 19:04:43 +0200 From: Ingo Molnar To: "K.R. Foley" Cc: linux-kernel@vger.kernel.org, Thomas Charbonnel , Florian Schmidt , Felipe Alfaro Solana , Lee Revell , Mark_H_Johnson@raytheon.com Subject: Re: [patch] voluntary-preempt-2.6.8.1-P5 Message-ID: <20040820170443.GB20232@elte.hu> References: <1092628493.810.3.camel@krustophenia.net> <20040816040515.GA13665@elte.hu> <1092654819.5057.18.camel@localhost> <20040816113131.GA30527@elte.hu> <20040816120933.GA4211@elte.hu> <1092716644.876.1.camel@krustophenia.net> <20040817080512.GA1649@elte.hu> <20040819073247.GA1798@elte.hu> <20040820133031.GA13105@elte.hu> <41260CA6.2040306@cybsft.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <41260CA6.2040306@cybsft.com> User-Agent: Mutt/1.4.1i X-ELTE-SpamVersion: MailScanner 4.31.6-itk1 (ELTE 1.2) SpamAssassin 2.63 ClamAV 0.73 X-ELTE-VirusStatus: clean X-ELTE-SpamCheck: no X-ELTE-SpamCheck-Details: score=-4.9, required 5.9, autolearn=not spam, BAYES_00 -4.90 X-ELTE-SpamLevel: X-ELTE-SpamScore: -4 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org * K.R. Foley wrote: > Ingo Molnar wrote: > > i've uploaded the -P5 patch: > > > > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P5 > > > > > I have been running the voluntary-preempt patches on one of my slower > (450) servers at home. The question is would latency traces from such > a slow system be useful to you in this testing. About the most load > that gets generated on this system, usually, is compiling the kernel > or a very large app. that I do development on. What I tend to do to > load the system is just run the stress-kernel suite and sometimes > Andrew's amlat program to provide RT scheduling pressure. > > If this would be useful, let me know as I have an interest in seeing > latencies reduced as much as possible. I am building with the -P5 > patch right now. If it would be more useful to try this on a faster > system or to stess the system in a different manner, I could do that > as well. sure, all traces are interesting! On your system the latencies will be a bit larger than on others, but that's all - the maximum latency points should be the same (or similar) critical sections. So it's just as useful as the other traces. Ingo