Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261731AbUKIWT5 (ORCPT ); Tue, 9 Nov 2004 17:19:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261711AbUKIWT4 (ORCPT ); Tue, 9 Nov 2004 17:19:56 -0500 Received: from mx1.elte.hu ([157.181.1.137]:39402 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261730AbUKIWS4 (ORCPT ); Tue, 9 Nov 2004 17:18:56 -0500 Date: Wed, 10 Nov 2004 00:20:02 +0100 From: Ingo Molnar To: Mark_H_Johnson@raytheon.com Cc: Amit Shah , Karsten Wiese , Bill Huey , Adam Heath , emann@mrv.com, Gunther Persoons , "K.R. Foley" , linux-kernel@vger.kernel.org, Florian Schmidt , Fernando Pablo Lopez-Lezcano , Lee Revell , Rui Nuno Capela , Shane Shrybman , Thomas Gleixner , Michal Schmidt Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.23 Message-ID: <20041109232002.GA14503@elte.hu> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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=-2.201, required 5.9, BAYES_00 -4.90, SORTED_RECIPS 2.70 X-ELTE-SpamLevel: X-ELTE-SpamScore: -2 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 933 Lines: 23 * Mark_H_Johnson@raytheon.com wrote: > [3] I am not so sure that the latency tracing works. I do not get any > trace output, even if I set preempt_max_latency to zero. What is the value of preempt_thresh? If it's set then it overrides the preempt_max_latency value. (previously the bogus timing values probably triggered even a relatively high preempt-threshold, but now with a correct tracer it's not possible anymore.) > [...] I also noticed that /proc/sys/kernel/preempt_wakeup_timing was > removed at .20 but not sure if that was deliberate. [...] yeah, this was deliberate - it's a side-effect of separating it from the other timing options. 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/