Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262232AbVAUA34 (ORCPT ); Thu, 20 Jan 2005 19:29:56 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262229AbVAUA34 (ORCPT ); Thu, 20 Jan 2005 19:29:56 -0500 Received: from mail.joq.us ([67.65.12.105]:37050 "EHLO sulphur.joq.us") by vger.kernel.org with ESMTP id S262230AbVAUA3c (ORCPT ); Thu, 20 Jan 2005 19:29:32 -0500 To: Peter Chubb Cc: Paul Davis , Con Kolivas , linux , Ingo Molnar , rlrevell@joe-job.com, CK Kernel , utz , Andrew Morton , alexn@dsv.su.se, Rui Nuno Capela Subject: Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling References: <200501201542.j0KFgOwo019109@localhost.localdomain> <87y8eo9hed.fsf@sulphur.joq.us> <16880.10712.159729.934973@wombat.chubb.wattle.id.au> From: "Jack O'Quin" Date: Thu, 20 Jan 2005 18:30:31 -0600 In-Reply-To: <16880.10712.159729.934973@wombat.chubb.wattle.id.au> (Peter Chubb's message of "Fri, 21 Jan 2005 08:59:52 +1100") Message-ID: <87oefj39p4.fsf@sulphur.joq.us> User-Agent: Gnus/5.1006 (Gnus v5.10.6) XEmacs/21.4 (Corporate Culture, linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1064 Lines: 25 Peter Chubb writes: >>>>>> "Jack" == Jack O'Quin writes: > > Jack> Looks like we need to do another study to determine which > Jack> filesystem works best for multi-track audio recording and > Jack> playback. XFS looks promising, but only if they get the latency > Jack> right. Any experience with that? > > The nice thing about audio/video and XFS is that if you know ahead of > time the max size of a file (and you usually do -- because you know > ahead of time how long a take is going to be) you can precreadte the > file as a contiguous chunk, then just fill it in, for minimum disc > latency. I am not talking about disk latency. The problem Con uncovered in ReiserFS was CPU hogging. Every 20 seconds there was a 6msec latency glitch in system response. -- joq - 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/