Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261917AbUKJQJI (ORCPT ); Wed, 10 Nov 2004 11:09:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261961AbUKJQJI (ORCPT ); Wed, 10 Nov 2004 11:09:08 -0500 Received: from mx1.elte.hu ([157.181.1.137]:63468 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S261917AbUKJQGc (ORCPT ); Wed, 10 Nov 2004 11:06:32 -0500 Date: Wed, 10 Nov 2004 18:06:15 +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: <20041110170615.GA21780@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: 1085 Lines: 23 * Mark_H_Johnson@raytheon.com wrote: > OK. So maybe I didn't understand what you said previously. Now, if I > build to get maximum-latency wakeup values, I can't get the IRQ off or > preempt off timing and traces? If that's not true, how do I switch > between the different sampling methods? you have to build another kernel for them. irqs-off and preempt-off timing can be mixed freely (and both can be enabled in the same kernel), but wakeup timing deserves its own .config space and since it's not mixable with the other two methods i didnt see much point in enabling all 3 at once with strange dependencies between them. Is this a big issue? Normally i think the wakeup timing is more than enough to get a feel of latencies, and if something specific is suspected the other ones can be turned on. 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/