From owner-freebsd-stable@FreeBSD.ORG Sun Nov 6 11:39:05 2005 Return-Path: X-Original-To: freebsd-stable@freebsd.org Delivered-To: freebsd-stable@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 8C74216A41F for ; Sun, 6 Nov 2005 11:39:05 +0000 (GMT) (envelope-from sebster@sebster.com) Received: from smtp.profdata.nl (server.profdata.nl [213.196.2.244]) by mx1.FreeBSD.org (Postfix) with SMTP id C3B6043D45 for ; Sun, 6 Nov 2005 11:39:04 +0000 (GMT) (envelope-from sebster@sebster.com) Received: (qmail 87719 invoked from network); 6 Nov 2005 11:39:04 -0000 Received: from unknown (HELO ?10.0.0.6?) (80.126.244.3) by server.profdata.nl with SMTP; 6 Nov 2005 11:39:03 -0000 Message-ID: <436DEB56.4050505@sebster.com> Date: Sun, 06 Nov 2005 12:39:02 +0100 From: Sebastiaan van Erk User-Agent: Mozilla Thunderbird 1.0.7 (X11/20051017) X-Accept-Language: en-us, en MIME-Version: 1.0 To: freebsd-stable@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Sound skipping problems X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Nov 2005 11:39:05 -0000 Hi, I have major sound skipping problems on FreeBSD 6.0. I checked the mailing list archives and found a related thread: http://lists.freebsd.org/pipermail/freebsd-current/2005-June/051103.html To quote Jeff Roberson: > I have a patch that should greatly improve the sound skipping problems > people have under heavy io load. Several people sent me traces that > showed the buf daemon running for hundreds of milliseconds with Giant > held, which can hold up the pcm code. The patch is available at: > > http://www.chesapeake.net/~jroberson/flushbuf.diff The problems are definately correlated to io load, however I can't say that I have HEAVY io loads. A simple: # sync;sync;sync; will already cause the sound to skip. I have DMA enabled on all drives, and it seems the above patch is already merged into FreeBSD 6.0-STABLE. This leaves me at a loss, and I don't know what else to try... Does anybody have any ideas of what I could do to solve this problem? Thanks in advance, Sebastiaan van Erk root@piglet(ttyp9:92:0):~# uname -a FreeBSD piglet.sebster.com 6.0-STABLE FreeBSD 6.0-STABLE #1: Sat Nov 5 23:42:18 CET 2005 root@piglet.sebster.com:/usr/obj/usr/src/sys/PIGLET i386 root@piglet(ttyp9:93:0):~# cat /dev/sndstat FreeBSD Audio Driver (newpcm) Installed devices: pcm0: at io 0xec00 irq 22 kld snd_via8233 (5p/1r/0v channels duplex default)