Re: [Fwd: Re: [patch] Real-Time Preemption, -RT-2.6.9-mm1-V0.4]

Ingo Molnar
2004-10-31T12:07:36Z

* Florian Schmidt <mista.tapas@gmx.net> wrote:

> On Sat, 30 Oct 2004 17:26:06 -0400
> Lee Revell <rlrevell@joe-job.com> wrote:
>
> > OK this is pretty sweet. With T3 the jitter never exceeds 7% on an idle
> > system. As soon as I start moving the mouse this goes to 7 or 8%. I
> > cannot get it to go higher than 10%. Moving windows around has no
> > effect, the highest jitter happens when I type or move the mouse really
> > fast IOW it corresponds to the interrupt rate.
> >
> > This is a pretty good baseline for what an xrun-free system would look
> > like. Now to test the latest version...
>
> Well,
>
> on V0.5.16 i see something like the below output (which is much worse). It
> seems that missed irq's with rtc show up at the same time as the xruns in
> jackd do [i ran both jackd and wakeup in parallel].

ok, could you try the -RT-V0.6.0 patch i've just uploaded? It could i
believe improve these latencies.

Ingo