Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261155AbVAWB5h (ORCPT ); Sat, 22 Jan 2005 20:57:37 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261168AbVAWB5h (ORCPT ); Sat, 22 Jan 2005 20:57:37 -0500 Received: from mail20.syd.optusnet.com.au ([211.29.132.201]:45535 "EHLO mail20.syd.optusnet.com.au") by vger.kernel.org with ESMTP id S261155AbVAWB5c (ORCPT ); Sat, 22 Jan 2005 20:57:32 -0500 Message-ID: <41F3046A.1050808@kolivas.org> Date: Sun, 23 Jan 2005 12:56:58 +1100 From: Con Kolivas User-Agent: Mozilla Thunderbird 1.0 (X11/20041206) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Paul Davis Cc: "Jack O'Quin" , Rui Nuno Capela , linux , Ingo Molnar , rlrevell@joe-job.com, CK Kernel , utz , Andrew Morton , alexn@dsv.su.se Subject: Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling References: <200501230141.j0N1fOAB022422@localhost.localdomain> In-Reply-To: <200501230141.j0N1fOAB022422@localhost.localdomain> 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="------------enig5C6DBCC8FA73E3531F0F45AA" Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2376 Lines: 65 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enig5C6DBCC8FA73E3531F0F45AA Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Paul Davis wrote: >>The idea is to get equivalent performance to SCHED_FIFO. The results >>show that much, and it is 100 times better than unprivileged >>SCHED_NORMAL. The fact that this is an unoptimised normal desktop >>environment means that the conclusion we _can_ draw is that SCHED_ISO is >>as good as SCHED_FIFO for audio on the average desktop. I need someone > > > no, this isn't true. the performance you are getting isn't as good as > SCHED_FIFO on a tuned system (h/w and s/w). the difference might be > the fact that you have "an average desktop", or it might be that your > desktop is just fine and SCHED_ISO actually is not as good as > SCHED_FIFO. On my desktop, whatever that is, SCHED_FIFO and SCHED_ISO results were the same. > >>with optimised hardware setup to see if it's as good as SCHED_FIFO in >>the critical setup. > > > agreed. i have every confidence that Lee and/or Jack will be > forthcoming :) Good stuff :). Meanwhile, I have the priority support working (but not bug free), and the preliminary results suggest that the results are better. Do I recall someone mentioning jackd uses threads at different priority? Cheers, Con P.S. If you read any emotion in my emails without a smiley or frowny face it's unintentional and is the limited emotional range the email format is allowed to convey. Hmm.. perhaps I should make this my sig ;) --------------enig5C6DBCC8FA73E3531F0F45AA 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 iD8DBQFB8wRqZUg7+tp6mRURAos/AJ0Spf4h/NhQiCMKVltyqyZ1WZoU/wCfVD3a bpqsYZBMUMP8U1lpKJhve+0= =oE6k -----END PGP SIGNATURE----- --------------enig5C6DBCC8FA73E3531F0F45AA-- - 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/