Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263219AbUKULsG (ORCPT ); Sun, 21 Nov 2004 06:48:06 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263214AbUKULqQ (ORCPT ); Sun, 21 Nov 2004 06:46:16 -0500 Received: from mx2.elte.hu ([157.181.151.9]:18562 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S263224AbUKULnd (ORCPT ); Sun, 21 Nov 2004 06:43:33 -0500 Date: Sun, 21 Nov 2004 13:45:55 +0100 From: Ingo Molnar To: Florian Schmidt Cc: Lee Revell , linux-kernel@vger.kernel.org, Rui Nuno Capela , Mark_H_Johnson@Raytheon.com, "K.R. Foley" , Bill Huey , Adam Heath , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , Gunther Persoons , emann@mrv.com, Shane Shrybman , Amit Shah Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.29-0 Message-ID: <20041121124555.GA7972@elte.hu> References: <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <20041118164612.GA17040@elte.hu> <1100920963.1424.1.camel@krustophenia.net> <20041120125536.GC8091@elte.hu> <1100971141.6879.18.camel@krustophenia.net> <20041120191403.GA16262@elte.hu> <1100975745.6879.35.camel@krustophenia.net> <20041120201155.6dc43c39@mango.fruits.de> <20041120214035.2deceaeb@mango.fruits.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041120214035.2deceaeb@mango.fruits.de> 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: 1012 Lines: 25 * Florian Schmidt wrote: > > Will build 29-4 PREEMPT_REALTIME now and see how this one behaves. > > Pretty much as bad as 29-1. Sadly i have no idea on how to find out > what is causing jackd to act so weird under a PREEMPT_REALTIME kernel. > It seems there is some correlation to activity on X. Hiding and > showing windows has a certain chance of triggering a large xrun. do you have chrt-ed the IRQ#0 thread and the soundcard thread as well? > So i don't really know how to go about this. I suppose i just run > PREEMPT kernels instead of PREEMPT_REALTIME. Maybe it's the overhead > which is killing jackd performance with PREEMPT_REALTIME, but i don't > believe so (50ms? nah!). agreed, no way can 50msec be related to overhead. 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/