Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S270477AbUJUNwt (ORCPT ); Thu, 21 Oct 2004 09:52:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S269216AbUJUNwd (ORCPT ); Thu, 21 Oct 2004 09:52:33 -0400 Received: from mx2.elte.hu ([157.181.151.9]:18883 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S270420AbUJUNwP (ORCPT ); Thu, 21 Oct 2004 09:52:15 -0400 Date: Thu, 21 Oct 2004 15:53:30 +0200 From: Ingo Molnar To: Rui Nuno Capela Cc: 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 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U8 Message-ID: <20041021135330.GA32206@elte.hu> References: <20041014234202.GA26207@elte.hu> <20041015102633.GA20132@elte.hu> <20041016153344.GA16766@elte.hu> <20041018145008.GA25707@elte.hu> <20041019124605.GA28896@elte.hu> <20041019180059.GA23113@elte.hu> <20041020094508.GA29080@elte.hu> <30690.195.245.190.93.1098349976.squirrel@195.245.190.93> <21840.195.245.190.94.1098363807.squirrel@195.245.190.94> <20041021134156.GA30791@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041021134156.GA30791@elte.hu> 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: 908 Lines: 23 * Ingo Molnar wrote: > i tried to pole jackd a little bit (just using things like > jack_freewheel and jack_impulse_grabber - i dont even know what they > do), and got jackd into some sort of userspace loop: > > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND > 2558 root 16 0 27900 1852 2152 S 97.8 0.8 2:36.38 jackd ah ... i should have guessed that "jack_freewheel y" puts jackd into ... freewheeling mode. So this is by design. i still suspect that it's some sort of userspace loop causing the jackd problems - just that under SCHED_OTHER you dont normally notice it, while with jack -R it's fatal. 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/