Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261618AbUJaMHg (ORCPT ); Sun, 31 Oct 2004 07:07:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261611AbUJaMHM (ORCPT ); Sun, 31 Oct 2004 07:07:12 -0500 Received: from mx2.elte.hu ([157.181.151.9]:53671 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261595AbUJaMGU (ORCPT ); Sun, 31 Oct 2004 07:06:20 -0500 Date: Sun, 31 Oct 2004 13:07:21 +0100 From: Ingo Molnar To: Florian Schmidt Cc: Lee Revell , Paul Davis , Thomas Gleixner , LKML , mark_h_johnson@raytheon.com, Bill Huey , Adam Heath , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , jackit-devel , Rui Nuno Capela Subject: Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4] Message-ID: <20041031120721.GA19450@elte.hu> References: <20041030115808.GA29692@elte.hu> <1099158570.1972.5.camel@krustophenia.net> <20041030191725.GA29747@elte.hu> <20041030214738.1918ea1d@mango.fruits.de> <1099165925.1972.22.camel@krustophenia.net> <20041030221548.5e82fad5@mango.fruits.de> <1099167996.1434.4.camel@krustophenia.net> <20041030231358.6f1eeeac@mango.fruits.de> <1099171567.1424.9.camel@krustophenia.net> <20041030233849.498fbb0f@mango.fruits.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041030233849.498fbb0f@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: 1183 Lines: 30 * Florian Schmidt wrote: > On Sat, 30 Oct 2004 17:26:06 -0400 > Lee Revell wrote: > > > OK this is pretty sweet. With T3 the jitter never exceeds 7% on an idle > > system. As soon as I start moving the mouse this goes to 7 or 8%. I > > cannot get it to go higher than 10%. Moving windows around has no > > effect, the highest jitter happens when I type or move the mouse really > > fast IOW it corresponds to the interrupt rate. > > > > This is a pretty good baseline for what an xrun-free system would look > > like. Now to test the latest version... > > Well, > > on V0.5.16 i see something like the below output (which is much worse). It > seems that missed irq's with rtc show up at the same time as the xruns in > jackd do [i ran both jackd and wakeup in parallel]. ok, could you try the -RT-V0.6.0 patch i've just uploaded? It could i believe improve these latencies. 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/