Sound skipping problems
Jeff Roberson
jroberson at chesapeake.net
Wed Jun 8 13:57:53 GMT 2005
On Wed, 8 Jun 2005, Pyun YongHyeon wrote:
> On Tue, Jun 07, 2005 at 11:32:12PM -0400, Jeff Roberson wrote:
> > 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
> >
> > This changes flushbufqueues to flush multiple buffers instead of one
> > buffer at a time. It also places buffers we failed to flush at the end of
> > the list, and uses a sentinal to track our progress through the list.
> > This almost entirely solved the skipping problem for me. Depending on
> > user feedback we can do a little more to reduce the time spent processing
> > here.
> >
>
> Unfortunatly, it seems that it doesn't show much difference.
> HW: Gateway Solo 5300(UP, P3 700MHz, maestro3 driver)
>
> As soon as I started to extract mozilla source the sound playing
> stopped and the system seems to be freezed.
> (No response from keyboard input except showing ^C.)
> It seems that there is no difference with/without witness.
I added an extra yield to the buf daemon. Try the new patch and see if it
makes a difference.
> --
> Regards,
> Pyun YongHyeon
> http://www.kr.freebsd.org/~yongari | yongari at freebsd.org
>
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