Re: Sound skipping problems

From: Jeff Roberson <jroberson_at_chesapeake.net>
Date: Wed, 8 Jun 2005 02:49:38 -0400 (EDT)
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)

Well, it helps out on my machine.  I need to investigate a little further.
At the moment, this seems to have problems after a while under load.  I'll
put this in my queue of things to look at though.

Thanks,
Jeff

>
> 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.
> --
> Regards,
> Pyun YongHyeon
> http://www.kr.freebsd.org/~yongari	|	yongari_at_freebsd.org
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Received on Wed Jun 08 2005 - 04:49:40 UTC

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