From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S267370AbUHPC7h (ORCPT ); Sun, 15 Aug 2004 22:59:37 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S267372AbUHPC7h (ORCPT ); Sun, 15 Aug 2004 22:59:37 -0400 Received: from mx1.elte.hu ([157.181.1.137]:29313 "EHLO mx1.elte.hu") by vger.kernel.org with ESMTP id S267370AbUHPC7g (ORCPT ); Sun, 15 Aug 2004 22:59:36 -0400 Date: Mon, 16 Aug 2004 05:00:53 +0200 From: Ingo Molnar To: Lee Revell Cc: Florian Schmidt , linux-kernel , Felipe Alfaro Solana Subject: Re: [patch] voluntary-preempt-2.6.8.1-P0 Message-ID: <20040816030053.GA10323@elte.hu> References: <1092382825.3450.19.camel@mindpipe> <20040813104817.GI8135@elte.hu> <1092432929.3450.78.camel@mindpipe> <20040814072009.GA6535@elte.hu> <20040815115649.GA26259@elte.hu> <20040816022554.16c3c84a@mango.fruits.de> <1092622121.867.109.camel@krustophenia.net> <20040816023655.GA8746@elte.hu> <1092624221.867.118.camel@krustophenia.net> <20040816025051.GA9481@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040816025051.GA9481@elte.hu> 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 * Ingo Molnar wrote: > could this be some DMA starvation effect? Or is this xrun calculated > from arrival of the audio interrupt (hence DMA completion) to the > actual running of jackd? would there be a way to find out what portion of the xrun is caused by latencies of the audio card (DMA, etc.) vs. latency from the point jackd is woken up by the sound-driver to the point jackd preempts the mlock process and runs? Ingo