Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263036AbUCSWEM (ORCPT ); Fri, 19 Mar 2004 17:04:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S263098AbUCSWEL (ORCPT ); Fri, 19 Mar 2004 17:04:11 -0500 Received: from turing-police.cirt.vt.edu ([128.173.54.129]:55684 "EHLO turing-police.cc.vt.edu") by vger.kernel.org with ESMTP id S263036AbUCSWEC (ORCPT ); Fri, 19 Mar 2004 17:04:02 -0500 Message-Id: <200403192203.i2JM3nSN016646@turing-police.cc.vt.edu> X-Mailer: exmh version 2.6.3 04/04/2003 with nmh-1.0.4+dev To: Robert Love Cc: Takashi Iwai , Andrew Morton , andrea@suse.de, mjy@geizhals.at, linux-kernel@vger.kernel.org Subject: Re: CONFIG_PREEMPT and server workloads In-Reply-To: Your message of "Thu, 18 Mar 2004 14:24:59 EST." <1079637899.6363.8.camel@localhost> From: Valdis.Kletnieks@vt.edu References: <40591EC1.1060204@geizhals.at> <20040318060358.GC29530@dualathlon.random> <20040318110159.321754d8.akpm@osdl.org> <1079637899.6363.8.camel@localhost> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="==_Exmh_-811876149P"; micalg=pgp-sha1; protocol="application/pgp-signature" Content-Transfer-Encoding: 7bit Date: Fri, 19 Mar 2004 17:03:49 -0500 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1697 Lines: 49 --==_Exmh_-811876149P Content-Type: text/plain; charset=us-ascii On Thu, 18 Mar 2004 14:24:59 EST, Robert Love said: > On Thu, 2004-03-18 at 14:08, Takashi Iwai wrote: > > > oh, sorry, maybe i forgot to tell you that it has been already there > > :) > > > > # echo 1 > /proc/asound/card0/pcm0p/xrun_debug > > > > this will show the stacktrace when a buffer overrun/underrun is > > detected in the irq handler. it's not perfect, though. > > Excellent! > > Has this resulted in anything useful? > > With KALLSYMS=y, a lot of users now become intelligent bug testers. > > Eh, except that I do not have that procfs entry on my system.. Is one of these yours? My machine has 3 (but only one soundcard) ;) % find /proc/asound/ -name xrun_debug -ls 4480 0 -r--r--r-- 1 root root 0 Mar 19 16:00 /proc/asound/card0/pcm1c/xrun_debug 4470 0 -r--r--r-- 1 root root 0 Mar 19 16:00 /proc/asound/card0/pcm0c/xrun_debug 4462 0 -r--r--r-- 1 root root 0 Mar 19 16:00 /proc/asound/card0/pcm0p/xrun_debug (Are these 3 different controls, or 3 places to set the same variable?) --==_Exmh_-811876149P Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) Comment: Exmh version 2.5 07/13/2001 iD8DBQFAW25FcC3lWbTT17ARAqWpAKC4UMi1rkmlSsMe/TAzroPc9QSqbwCfSegD mEZD2mSCcjzRhvkv4EpFeEM= =TFfF -----END PGP SIGNATURE----- --==_Exmh_-811876149P-- - 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/