Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261998AbUKVJbd (ORCPT ); Mon, 22 Nov 2004 04:31:33 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262007AbUKVJbd (ORCPT ); Mon, 22 Nov 2004 04:31:33 -0500 Received: from mail.onestepahead.de ([62.96.100.59]:25317 "EHLO mail.onestepahead.de") by vger.kernel.org with ESMTP id S261998AbUKVJb3 (ORCPT ); Mon, 22 Nov 2004 04:31:29 -0500 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm1-V0.7.28-1 From: Christian Meder To: Ingo Molnar Cc: Rui Nuno Capela , linux-kernel@vger.kernel.org, Lee Revell , mark_h_johnson@raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Florian Schmidt , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , Gunther Persoons , emann@mrv.com, Shane Shrybman , Amit Shah In-Reply-To: <20041119095451.GC27642@elte.hu> References: <20041111144414.GA8881@elte.hu> <20041111215122.GA5885@elte.hu> <20041116125402.GA9258@elte.hu> <20041116130946.GA11053@elte.hu> <20041116134027.GA13360@elte.hu> <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <49222.195.245.190.94.1100789179.squirrel@195.245.190.94> <20041118210517.GA8703@elte.hu> <1100818448.3476.17.camel@localhost> <20041119095451.GC27642@elte.hu> Content-Type: text/plain Date: Mon, 22 Nov 2004 10:31:00 +0100 Message-Id: <1101115860.4182.7.camel@localhost> Mime-Version: 1.0 X-Mailer: Evolution 2.0.2 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2126 Lines: 59 On Fri, 2004-11-19 at 10:54 +0100, Ingo Molnar wrote: > * Christian Meder wrote: > > > This just leaves me with the mysterious traceless jvm related crash. > > I'll do my best to get a trace ;-) > > it would be equally useful to somehow reproduce the lockup with public > software only, and post the precise steps how to reproduce it. Hi Ingo, after two evenings of experimenting this is the current status (everything based on 0.7.29-0, will try 0.7.30-x during the day): * the lockup can't be triggered from the console or using a remote session and I really tried to torture the box ;-) * the real trigger is mouse activity in X * the other important factor is running the jvm in profiling mode, running without jvm or with the jvm in non-profiling mode leaves the box stable * I couldn't yet figure out the pattern of java program which is triggering. Not every java program is triggering but at least I found several public available ones. I wrote some small test programs doing simple multithreading but they didn't trigger. So the simplest setup I found til now is the following: chris@blue:~$ java -version java version "1.4.1" Java(TM) 2 Runtime Environment, Standard Edition (build Blackdown-1.4.1-01) Java HotSpot(TM) Client VM (build Blackdown-1.4.1-01, mixed mode) chris@blue:~$ JAVA_OPTIONS=-Xrunhprof:cpu=samples,file=crap.log,depth=3 jython Jython 2.1 on java1.4.1 (JIT: null) Type "copyright", "credits" or "license" for more information. >>> Now moving the mouse around in X will make the box lockup in less than 10 seconds. I'm not sure if JAVA_OPTIONS is a standard jython feature but at least it's part of the jython-wrapper script of Debian. Christian -- Christian Meder, email: chris@onestepahead.de The Way-Seeking Mind of a tenzo is actualized by rolling up your sleeves. (Eihei Dogen Zenji) - 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/