Messages in this thread | | | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P0 | From | Lee Revell <> | Date | Sun, 15 Aug 2004 23:36:40 -0400 |
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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
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