From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261223AbVAWEwe (ORCPT ); Sat, 22 Jan 2005 23:52:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261224AbVAWEwe (ORCPT ); Sat, 22 Jan 2005 23:52:34 -0500 Received: from mail21.syd.optusnet.com.au ([211.29.133.158]:33757 "EHLO mail21.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S261221AbVAWEvZ (ORCPT ); Sat, 22 Jan 2005 23:51:25 -0500 Message-ID: <41F32D32.7050007@kolivas.org> Date: Sun, 23 Jan 2005 15:50:58 +1100 From: Con Kolivas User-Agent: Mozilla Thunderbird 1.0 (X11/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: "Jack O'Quin" Cc: Rui Nuno Capela , linux , Ingo Molnar , rlrevell@joe-job.com, paul@linuxaudiosystems.com, CK Kernel , utz , Andrew Morton , alexn@dsv.su.se Subject: Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling References: <41EEE1B1.9080909@kolivas.org> <41EF00ED.4070908@kolivas.org> <873bwwga0w.fsf@sulphur.joq.us> <41EF123D.703@kolivas.org> <87ekgges2o.fsf@sulphur.joq.us> <41EF2E7E.8070604@kolivas.org> <87oefkd7ew.fsf@sulphur.joq.us> <10752.195.245.190.93.1106211979.squirrel@195.245.190.93> <65352.195.245.190.94.1106240981.squirrel@195.245.190.94> <41F19907.2020809@kolivas.org> <87k6q6c7fz.fsf@sulphur.joq.us> <41F1F735.1000603@kolivas.org> <41F1F7AF.7000105@kolivas.org> <41F1FC1D.10308@kolivas.org> <87wtu55i3x.fsf@sulphur.joq.us> <41F2F7C1.70404@kolivas.org> <87r7kcu9tt.fsf@sulphur.joq.us> <41F32832.50100@kolivas.org> <87acr03g8e.fsf@sulphur.joq.us> In-Reply-To: <87acr03g8e.fsf@sulphur.joq.us> X-Enigmail-Version: 0.89.5.0 X-Enigmail-Supports: pgp-inline, pgp-mime Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enig018D96D6B9338855593DC64A" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig018D96D6B9338855593DC64A Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Jack O'Quin wrote: > Con Kolivas writes: > > >>Jack O'Quin wrote: >>[snip lots of valid points] >> >>>suggest some things to try. First, make sure the JACK tmp directory >>>is mounted on a tmpfs[1]. Then, try the test with ext2, instead of >> >>Looks like the tmpfs is probably the biggest problem. Here's SCHED_ISO >>with just the /tmp mounted on tmpfs change - running on a complete >>desktop environment with a 2nd exported X seession and my wife >>browsing the net and emailing at the same time. >> >>All invalid runs removed and just this one posted here: >>http://ck.kolivas.org/patches/SCHED_ISO/iso2-benchmarks/ >> >>How's that look? > > > Excellent! > > Sorry I didn't warn you about that problem before. JACK audio users > generally know about it, but there's no reason you should have. > > So, that was run with ext3? Yes I think I mentioned before this is a different machine than the pentiumM one. It's a P4HT3.06 with on board i810 sound and ext3 (which explains the vastly different DSP usage). The only "special" measure taken for jackd was to use the latest jackd code and the tmpfs mount you suggested. Looks like the number of steps to convert a modern "standard setup" desktop to a low latency one on linux aren't that big after all :) Cheers, Con --------------enig018D96D6B9338855593DC64A Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFB8y00ZUg7+tp6mRURAuwFAJ9P1nM1uxbGQiPUAFOAT2VfGGxy3ACZATWx b9ApatR4ShIcxlJi5u4ki+A= =5YDx -----END PGP SIGNATURE----- --------------enig018D96D6B9338855593DC64A--