Re: [patch] voluntary-preempt-2.6.8.1-P0

Lee Revell
2004-08-16T03:36:02Z

On Sun, 2004-08-15 at 23:28, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
>
> > I believe the constant-time behavior that I reported was an artifact
> > of ALSA xrun debugging. Now it seems like the latency produced *does*
> > correspond directly to the amount of memory being mlockall'ed. If
> > ./mlockall-test 1500 triggers an xrun at all it's ~0.2ms. 3000
> > triggers a ~1ms xrun, and 10000 a ~3 ms xrun.
>
> could you try more extreme values - e.g. does 100 MB cause a 30 msec
> xrun?
>

This causes a series of xruns, ranging from maybe 2 to 10ms.

Lee