Re: [patch] SCHED_SOFTRR linux scheduler policy ...

[Miguel Freitas <miguel@cetuc.puc-rio.br>]

On Sat, 2003-07-12 at 13:30, Davide Libenzi wrote:
> > > Patch acceptance is
> > > tricky and definitely would need more discussion and test.
> >
> > Sure. But let me add a voice of support here: I would be great if kernel
> > provided a way to multimedia or interactive applications to request a
> > better latency predictability (or hint the scheduler somehow) without
> > need of being root. If that comes in a form of a new scheduler policy,
> > or just allowing small negative nice values for non-root i don't mind...
> 
> You'd need a nice value that will keep you away from being caught by
> interactive SCHED_OTHER. Otherwise yes, this is another solution. Did you
> try it with xine under high load ?

Since i upgraded my computer recently it's difficult to compare with the
experiments i made before. But basically no, i haven't tried to make
xine smooth under high load. my primary complain was that even a small
background load caused by KSysGuard (KDE system monitor) could make it
drop frames from time to time. with nice values like -2 the problem was
completely fixed.

regards,

Miguel