Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262096AbUJZDBu (ORCPT ); Mon, 25 Oct 2004 23:01:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262134AbUJZDBd (ORCPT ); Mon, 25 Oct 2004 23:01:33 -0400 Received: from mustang.oldcity.dca.net ([216.158.38.3]:18357 "HELO mustang.oldcity.dca.net") by vger.kernel.org with SMTP id S262096AbUJZDBO (ORCPT ); Mon, 25 Oct 2004 23:01:14 -0400 Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0 From: Lee Revell To: Rui Nuno Capela Cc: Ingo Molnar , Florian Schmidt , "K.R. Foley" , linux-kernel@vger.kernel.org, mark_h_johnson@raytheon.com, Bill Huey , Adam Heath , Thomas Gleixner , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Alexander Batyrshin In-Reply-To: <33313.192.168.1.5.1098733224.squirrel@192.168.1.5> References: <20041022155048.GA16240@elte.hu> <20041022175633.GA1864@elte.hu> <20041025104023.GA1960@elte.hu> <417CDE90.6040201@cybsft.com> <20041025111046.GA3630@elte.hu> <20041025121210.GA6555@elte.hu> <20041025152458.3e62120a@mango.fruits.de> <20041025132605.GA9516@elte.hu> <20041025160330.394e9071@mango.fruits.de> <20041025141008.GA13512@elte.hu> <20041025141628.GA14282@elte.hu> <33313.192.168.1.5.1098733224.squirrel@192.168.1.5> Content-Type: text/plain Date: Mon, 25 Oct 2004 23:01:11 -0400 Message-Id: <1098759671.9166.10.camel@krustophenia.net> 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: 889 Lines: 20 On Mon, 2004-10-25 at 20:40 +0100, Rui Nuno Capela wrote: > OTOH, jackd -R xruns are awfully back, even thought I (re)prioritize the > relevant IRQ thread handlers to be always higher than jackd's. Actually they should be lower, except the soundcard. I was only able to get the xrun free behavior of T3 by setting all IRQ threads except the soundcard to SCHED_OTHER. Especially important was setting ksoftirqd to SCHED_OTHER, this actually may have been the only one necessary. The relative priorities of jackd and the soundcard irq do not matter as these two should never contend (aka they are never both runnable at the same time). Lee - 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/