Sound skipping problems

[Ariff Abdullah]

On Sun, 06 Nov 2005 12:39:02 +0100
Sebastiaan van Erk <sebster at 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)
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