Re: [Bug #10640] audio skipping on 2.6.26-rc1

From: Ingo Molnar
Date: Mon May 12 2008 - 03:53:25 EST



* Parag Warudkar <parag.warudkar@xxxxxxxxx> wrote:

> Rafael J. Wysocki <rjw <at> sisk.pl> writes:
>
> > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=10640
> > Subject : audio skipping on 2.6.26-rc1
> > Submitter : Miklos Szeredi <miklos <at> szeredi.hu>
> > Date : 2008-05-07 7:56 (5 days old)
> > References : http://marc.info/?l=linux-kernel&m=121014707707781&w=2
> > Handled-By : Ingo Molnar <mingo <at> elte.hu>
>
> This is a duplicate of [Bug #10616] Horrendous Audio Stutter - current
> git .

that should be resolved via your patch which i pushed upstream (commit
v2.6.26-rc1-83-gaac6abc), which marks group scheduling experimental and
non-default.

i think the audio skipping from Miklos, if it does not go away with
disabling group scheduling, might also be solved by:

- commit v2.6.26-rc1-181-g4615112 ("sched: fix weight calculations")
from Mike.

- or by commit v2.6.26-rc1-82-g3e51f33 from Peter ("sched: add optional
support for CONFIG_HAVE_UNSTABLE_SCHED_CLOCK") which makes the
scheduler clock more reliable [and hence produce no artificial
latencies] on NOHZ

- or by commit v2.6.26-rc1-66-ga992241 from Peter ("sched: fix
normalized sleeper").

Ingo
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