Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261289AbUKCBPa (ORCPT ); Tue, 2 Nov 2004 20:15:30 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261235AbUKCBP2 (ORCPT ); Tue, 2 Nov 2004 20:15:28 -0500 Received: from mx2.elte.hu ([157.181.151.9]:57503 "EHLO mx2.elte.hu") by vger.kernel.org with ESMTP id S261277AbUKCBOH (ORCPT ); Tue, 2 Nov 2004 20:14:07 -0500 Date: Wed, 3 Nov 2004 02:15:11 +0100 From: Ingo Molnar To: Rui Nuno Capela Cc: mark_h_johnson@raytheon.com, Thomas Gleixner , Florian Schmidt , Lee Revell , Paul Davis , LKML , Bill Huey , Adam Heath , Michal Schmidt , Fernando Pablo Lopez-Lezcano , Karsten Wiese , "K.R. Foley" Subject: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.6.9 Message-ID: <20041103011511.GB16884@elte.hu> References: <20041102191858.GB1216@elte.hu> <20041102192709.GA1674@elte.hu> <32932.192.168.1.8.1099437703.squirrel@192.168.1.8> <32796.192.168.1.5.1099442372.squirrel@192.168.1.5> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <32796.192.168.1.5.1099442372.squirrel@192.168.1.5> 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: 1789 Lines: 43 * Rui Nuno Capela wrote: > Rui Nuno Capela wrote: > > > > I am also rehearsing these same tests on my P4/SMT desktop. > > I'll post those a bit later today. > > > > So here they are. This machine is a P4 2.80C@3.366GHz, HT enabled on a > Asus P4P800 mobo, Intel 82801EB onboard sound device (snd-intel8x0). > > 2.6.9smp RT-V0.6.9smp > ------------ ------------ > XRUN Rate . . . . . . . . . : 0 0 /hour > Delay Rate (>spare time) . . : 0 0 /hour > Delay Rate (>1000 usecs) . . : 0 0 /hour > Delay Maximum . . . . . . . . : 346 166 usecs > Cycle Maximum . . . . . . . . : 986 1028 usecs > Average DSP Load. . . . . . . : 25.0 25.7 % > Average Interrupt Rate . . . : 1717 1718 /sec > Average Context-Switch Rate . : 10082 15793 /sec > > As you can see, the results here aren't so disparate as on my UP > laptop. i suspect it has to do with the different load - the UP laptop had 40% utilization, this box is 25% utilized. > I guess that I can stress this out and lower the period size on jackd > -R, to -p64. And even increase the workload with more client instances > (from 9 to 18 ?) to let the RT show it's potential, if that makes > sense at all. yeah, it would really be nice to see how much it can take and to see the point where the -RT kernel starts to suffer from xruns too. 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/