Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.29-0

[Ingo Molnar]

* Florian Schmidt <mista.tapas@xxxxxxx> wrote:

> > Will build 29-4 PREEMPT_REALTIME now and see how this one behaves.
> 
> Pretty much as bad as 29-1. Sadly i have no idea on how to find out
> what is causing jackd to act so weird under a PREEMPT_REALTIME kernel.
> It seems there is some correlation to activity on X. Hiding and
> showing windows has a certain chance of triggering a large xrun.

do you have chrt-ed the IRQ#0 thread and the soundcard thread as well?

> So i don't really know how to go about this. I suppose i just run
> PREEMPT kernels instead of PREEMPT_REALTIME. Maybe it's the overhead
> which is killing jackd performance with PREEMPT_REALTIME, but i don't
> believe so (50ms? nah!).

agreed, no way can 50msec be related to overhead.

	Ingo
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