From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751353AbWDFEJO (ORCPT ); Thu, 6 Apr 2006 00:09:14 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932138AbWDFEJO (ORCPT ); Thu, 6 Apr 2006 00:09:14 -0400 Received: from theorix.CeNTIE.NET.au ([202.9.6.84]:38868 "HELO theorix.CeNTIE.NET.au") by vger.kernel.org with SMTP id S1751371AbWDFEJN (ORCPT ); Thu, 6 Apr 2006 00:09:13 -0400 Subject: Re: 2.6.16-rt11 and low-latency audio xruns (interrupt latency problem?) From: "Valin, Jean-Marc (ICT Centre, Marsfield)" To: Lee Revell Cc: linux-kernel@vger.kernel.org In-Reply-To: <1143699565.7328.8.camel@theorix.CeNTIE.NET.au> References: <1143695638.7328.5.camel@theorix.CeNTIE.NET.au> <1143699333.15145.20.camel@mindpipe> <1143699565.7328.8.camel@theorix.CeNTIE.NET.au> Content-Type: text/plain Content-Transfer-Encoding: 7bit Date: Thu, 06 Apr 2006 14:09:04 +1000 Message-Id: <1144296544.21536.11.camel@theorix.CeNTIE.NET.au> Mime-Version: 1.0 X-Mailer: Evolution 2.4.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2006-03-30 at 17:19 +1100, Valin, Jean-Marc (ICT Centre, Marsfield) wrote: > > It's possible that your hardware simply isn't capable of this and you'll > > have to get a multichannel soundcard (more channels means you can use a > > smaller buffer before hitting the lower limit of a PCI transfer) or use > > a period of 128 samples or more. Could you give me more info on that PCI transfer limit? I couldn't find any reference to that on the web. Also, any way to see if that's the real cause of the problem. I've been doing some experiments and noticed that the percentage or xruns I get is almost independent of the period size, which is a little odd. Any idea? Jean-Marc