Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S266813AbUIFGaP (ORCPT ); Mon, 6 Sep 2004 02:30:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S266837AbUIFGaP (ORCPT ); Mon, 6 Sep 2004 02:30:15 -0400 Received: from mx1.elte.hu ([157.181.1.137]:34447 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S266813AbUIFGaK (ORCPT ); Mon, 6 Sep 2004 02:30:10 -0400 Date: Mon, 6 Sep 2004 08:30:40 +0200 From: Ingo Molnar To: Lee Revell Cc: Florian Schmidt , "K.R. Foley" , linux-kernel , felipe_alfaro@linuxmail.org Subject: Re: [patch] voluntary-preempt-2.6.9-rc1-bk12-R5 Message-ID: <20040906063040.GA11541@elte.hu> References: <20040903120957.00665413@mango.fruits.de> <20040904195141.GA6208@elte.hu> <20040905140249.GA23502@elte.hu> <1094408203.4445.5.camel@krustophenia.net> <20040905191227.GA29797@elte.hu> <1094418192.4445.58.camel@krustophenia.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1094418192.4445.58.camel@krustophenia.net> 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 Content-Length: 831 Lines: 20 * Lee Revell wrote: > http://krustophenia.net/testresults.php?dataset=2.6.9-rc1-R0#/var/www/2.6.9-rc1-R0/foo.hist > > I find the two smaller spikes to either side of the central spike > really odd. These showed up in my jackd tests too, I had attributed > them to some measurement artifact, but they seem real. Maybe a > rounding bug, or some kind of weird cache effect? interesting - the histograms are pretty symmetric around the center. E.g. the exponential foo.hist2 diagram is way too symmetric around 50 usecs! What precisely is being measured? Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/