From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757477AbYDGMdS (ORCPT ); Mon, 7 Apr 2008 08:33:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751129AbYDGMdH (ORCPT ); Mon, 7 Apr 2008 08:33:07 -0400 Received: from mx2.mail.elte.hu ([157.181.151.9]:53458 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750878AbYDGMdG (ORCPT ); Mon, 7 Apr 2008 08:33:06 -0400 Date: Mon, 7 Apr 2008 14:32:34 +0200 From: Ingo Molnar To: Frans Pop Cc: linux-kernel@vger.kernel.org, Dhaval Giani , "Rafael J. Wysocki" , Srivatsa Vaddagiri , Peter Zijlstra Subject: Re: [rc8] Regression: key repeats and skips in music during compilation Message-ID: <20080407123234.GA8521@elte.hu> References: <200804041222.35025.elendil@planet.nl> <200804071229.27113.rjw@sisk.pl> <20080407112459.GA11532@linux.vnet.ibm.com> <200804071403.59500.elendil@planet.nl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200804071403.59500.elendil@planet.nl> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Frans Pop wrote: > > I thought we had most of the issues ironed out. > > Note that I can also reproduce the issue with a kernel that does *not* > have CONFIG_GROUP_SCHED set. I still get the music skips (maybe less > frequently, but that's hard to measure), and I've have also seen key > repeats once. > > Anything I can do to provide additional info on this? yes, if you have an audio skipping bug, there's a mini-howto at: http://people.redhat.com/mingo/sched-devel.git/howto-debug-latencies.txt and a more laborous way would be to trace such skipping: http://people.redhat.com/mingo/sched-devel.git/howto-trace-latencies.txt Ingo