From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764680AbXK3Srl (ORCPT ); Fri, 30 Nov 2007 13:47:41 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1761716AbXK3Srb (ORCPT ); Fri, 30 Nov 2007 13:47:31 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:43837 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763647AbXK3Sra (ORCPT ); Fri, 30 Nov 2007 13:47:30 -0500 Date: Fri, 30 Nov 2007 19:46:25 +0100 From: Ingo Molnar To: =?iso-8859-1?Q?J=F6rn?= Engel Cc: Mark Lord , Pavel Machek , Mark Lord , Thomas Gleixner , len.brown@intel.com, Andrew Morton , linux-kernel@vger.kernel.org, linux-pm@lists.linux-foundation.org, rjw@sisk.pl Subject: Re: [BUG] Strange 1-second pauses during Resume-from-RAM Message-ID: <20071130184625.GB9928@elte.hu> References: <4739E347.30406@rtr.ca> <473C7495.40805@rtr.ca> <20071115181418.GA6603@ucw.cz> <473C825E.3030307@rtr.ca> <20071115193424.GA31691@elte.hu> <20071115193612.GA751@elte.hu> <20071130125628.GA30773@lazybastard.org> <20071130133546.GB29679@elte.hu> <20071130134312.GA32273@elte.hu> <20071130183510.GA1570@lazybastard.org> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20071130183510.GA1570@lazybastard.org> 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 X-Mailing-List: linux-kernel@vger.kernel.org * Jörn Engel wrote: > On Fri, 30 November 2007 14:43:12 +0100, Ingo Molnar wrote: > > > > http://redhat.com/~mingo/latency-tracing-patches/latency-tracing-v2.6.24-rc3.combo.patch > > > > does it work any better? > > It compiles. It boots with a 512M RAM (384M was too little with all > the other debug options on). But it seems to lock up when running > trace-cmd. On a rerun it locks up again, but with different output. hm, you should decrease MAX_TRACE in kernel/latency_tracing.c from 1 million to 16K or so. 1 million entries probably depletes lowmem quite seriously. > Rerun was captured: > http://logfs.org/~joern/trace1.jpg hm, that looks weird. if you disable CONFIG_PROVE_LOCKING, does that improve things? (or just turns a noisy lockup into a silent lockup?) > I should do a couple of runs, but my girlfriend claims realtime > priority for the evening. yeah, SCHED_IDLE is not generally well received by them. Ingo