Date: Sun, 6 Nov 2005 21:04:47 +0800 From: Ariff Abdullah <skywizard@MyBSD.org.my> To: Sebastiaan van Erk <sebster@sebster.com> Cc: freebsd-stable@freebsd.org Subject: Re: Sound skipping problems Message-ID: <20051106210447.2145e551.skywizard@MyBSD.org.my> In-Reply-To: <436DEB56.4050505@sebster.com> References: <436DEB56.4050505@sebster.com>
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On Sun, 06 Nov 2005 12:39:02 +0100 Sebastiaan van Erk <sebster@sebster.com> wrote: > 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? > > Recompile your kernel with "options PREEMPTION", and apply this patch: http://people.freebsd.org/~ariff/snd_RELENG_6_0_20051030_058.diff -- Ariff Abdullah MyBSD http://www.MyBSD.org.my (IPv6/IPv4) http://staff.MyBSD.org.my (IPv6/IPv4) http://tomoyo.MyBSD.org.my (IPv6/IPv4)
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