On Friday, August 29, 2014 09:47:25 AM Fons Adriaensen wrote:
> On Fri, Aug 29, 2014 at 06:33:43PM +1000, Simon Wise wrote:
> > Seems that 3.14 has also added a deadline-based scheduler that is
> > closer to what audio needs from realtime than the extremely low
> > latency preemption based on priorities that the two older realtime
> > schedulers offer.
> >
> > http://www.linuxfoundation.org/news-media/blogs/browse/2014/01/deadline-sc
> > heduling-314
> Not really.
>
> The new scheduler is designed to run a set of periodic tasks,
> with arbitrary periods and having few or no dependencies between
> them, at up to 100% CPU usage, while meeting their deadlines.
>
> Rate-proportional scheduling (shorter period -> higher priority)
> can only do this up to 69% CPU use, except in some special cases
> such as all periods being equal or having simple integer ratios
> between them.
>
What about pinning a core (or cores) to audio processing? If the system is
truly being stressed to the point that it has become challenging for the
scheduler to keep up, wouldn't pinning make more sense?
-Reuben
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Received on Sun Aug 31 00:15:02 2014
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