Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262079AbUKVM7q (ORCPT ); Mon, 22 Nov 2004 07:59:46 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262077AbUKVM7q (ORCPT ); Mon, 22 Nov 2004 07:59:46 -0500 Received: from smtp1.netcabo.pt ([212.113.174.28]:45627 "EHLO exch01smtp11.hdi.tvcabo") by vger.kernel.org with ESMTP id S262079AbUKVM7F (ORCPT ); Mon, 22 Nov 2004 07:59:05 -0500 Message-ID: <18923.195.245.190.93.1101128215.squirrel@195.245.190.93> In-Reply-To: <20041122132459.GB19577@elte.hu> References: <20041116125402.GA9258@elte.hu> <20041116130946.GA11053@elte.hu> <20041116134027.GA13360@elte.hu> <20041117124234.GA25956@elte.hu> <20041118123521.GA29091@elte.hu> <20041118164612.GA17040@elte.hu> <20041122005411.GA19363@elte.hu> <20041122020741.5d69f8bf@mango.fruits.de> <20041122094602.GA6817@elte.hu> <56781.195.245.190.93.1101119801.squirrel@195.245.190.93> <20041122132459.GB19577@elte.hu> Date: Mon, 22 Nov 2004 12:56:55 -0000 (WET) Subject: Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.30-2 From: "Rui Nuno Capela" To: "Ingo Molnar" Cc: "Florian Schmidt" , linux-kernel@vger.kernel.org, "Lee Revell" , 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" , "Esben Nielsen" User-Agent: SquirrelMail/1.4.3a X-Mailer: SquirrelMail/1.4.3a MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT X-Priority: 3 (Normal) Importance: Normal X-OriginalArrivalTime: 22 Nov 2004 12:59:04.0450 (UTC) FILETIME=[0B798620:01C4D093] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2577 Lines: 75 Ingo Molnar wrote: > > Rui Nuno Capela wrote: > >> > great. I now suspect that some of the xrun problems Rui was observing >> > on -RT kernel could be (positively) affected by these fixes too. >> > >> >> Just made some test-runs with RT-V0.7.30-2, with my jackd-R + >> 8*fluidsynth benchmark on my laptop (P4/UP), and the results don't >> seem to be eligible to the hall of fame, at least when compared with >> RT-0.7.7 as the ones I last posted here a few weeks ago. >> >> I hate to say this, but the XRUN rate has increased since RT-0.7.7, >> and the maximum scheduling delay reported by jackd has also degraded >> to 1000 usecs (was around 600 usecs). > > well, life would be too easy if two bugs were fixed at once ;) These > were nodebug runs, right? Could you give me a description of the precise > commands of how you started jackd and fluidsyth (and their versions) - > so that i could try to reproduce & debug your setup. It is certainly a > complex scheduling scenario. > > (perhaps with a link to the .sf2 and .mid files you used, if they are > public - or whether it's fine if i use the VintageDreamsWaves-v2.sf2 > sound-fonts that comes with fluidsynth plus a random .mid file from the > net?) > These are the command-lines of my test suite: jackd -R -dalsa -dhw:0 -P20 -r44100 -p64 -n2 -S -P & fluidsynth -s -i -a jack -j -o jack.audio.id=fluid1 -o shell.port=9800 ct4mgm.sf2 & fluidsynth -s -i -a jack -j -o jack.audio.id=fluid2 -o shell.port=9801 ct4mgm.sf2 & . . . fluidsynth -s -i -a jack -j -o jack.audio.id=fluid8 -o shell.port=9807 ct4mgm.sf2 & Versions are: jack 0.99.10cvs fluidsynth 1.0.5 >> OTOH, there's another thing: I don't seem to be able to build an >> initrd image under the latest RT kernels. Something related to the >> loopback device. When trying to run mkinitrd it stalls, somewhere >> under this process: >> >> mount -t ext2 /root/tmp/initrd.img /root/tmp/initrd.mnt -o loop > > Do you know when this started, roughly? > Not sure, but the first time I've noticed it was on RT-0.7.29-2 and that was purely by chance. Problem is that I've been building the RT kernels under a non-RT stock kernel, so I can't say how long or when it all started exactly. I remember however that this is a revisited issue, thought. Cheers. -- rncbc aka Rui Nuno Capela rncbc@rncbc.org - 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/