From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932332AbXDZJOJ (ORCPT ); Thu, 26 Apr 2007 05:14:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933699AbXDZJOI (ORCPT ); Thu, 26 Apr 2007 05:14:08 -0400 Received: from an-out-0708.google.com ([209.85.132.242]:19051 "EHLO an-out-0708.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932332AbXDZJOF (ORCPT ); Thu, 26 Apr 2007 05:14:05 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:date:from:to:subject:message-id:x-mailer:mime-version:content-type; b=Kes+0RTegKRvf3+MXbHuR4zHaaB6FgMygTFHdBI7juCVmGed/QZK6H9e1HeENlyb/jdg5GyAApqzxeUHmLeBEidfCaUaB6BDAaSsT/CiRoX6teMC8gQXebtDwRedlWcTy0GkpBshW6Eos3oVfCrmHktc+VRxnv7urUPT5khpxPY= Date: Thu, 26 Apr 2007 02:13:50 -0700 From: Mike Mattie To: lkml Subject: recomended way to check longest period that interupts are disabled ? Message-ID: <20070426021350.29ddfa0a@reforged> X-Mailer: Claws Mail 2.6.1 (GTK+ 2.10.9; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: multipart/signed; boundary="Sig_FRhUQfr90VvhNV7f3.K=cTr"; protocol="application/pgp-signature"; micalg=PGP-SHA1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --Sig_FRhUQfr90VvhNV7f3.K=cTr Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable Hello, I am still struggling to track down problems with audio playback. I get int= ermittent: Apr 26 02:01:40 reforged [13230.947879] cannot submit sync urb (err =3D -45) I have tackled the scheduler issues to where I really don't think the driver is being starved at all. I am running audacious like so: schedtool -R -p 50 -n 1 -e audacious At this point the strongest correlation I can get is that starting programs seems to trigger the stutter. I have suspected IO for some time. My system image , / & /usr are on a libata (VIA PATA) driver. I have disabled the write-cache , but I also have noatime set on mount, for /usr My big suspicion is that one of my drivers, likely IO is disabling interrupts for too long. I have looked but not found a tool for measuring the longest period interrupts are disabled and pointing the finger at the culprit, could anyone on this list recommend tools that might help me pinpoint what is going on ? I would also be delighted for any sort of recommended latency testing tools. pin-pointing this is going to be a "learning experience" but every time I think I am about to have a bonding moment with=20 the kernel audio skips; I am highly motivated. Cheers, Mike Mattie - codermattie@gmail.com --Sig_FRhUQfr90VvhNV7f3.K=cTr Content-Type: application/pgp-signature; name=signature.asc Content-Disposition: attachment; filename=signature.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFGMG1XdfRchrkBInkRAhpdAJ4/wipQY/g5xQuQ1IzW2MVzwdvu3ACcDNeX b0/MKQGM0qCq/HUs8lvSQdM= =uYaS -----END PGP SIGNATURE----- --Sig_FRhUQfr90VvhNV7f3.K=cTr--