Re: [PATCH] scheduler: fix x86 regression in native_sched_clock

[Ingo Molnar]

* Michael Buesch <mb@xxxxxxxxx> wrote:

> > i cannot see how. You can verify msleep by running something like this:
> > 
> >   while :; do time usleep 111000; done
> > 
> > you should see a steady stream of:
> > 
> >  real    0m0.113s
> >  real    0m0.113s
> >  real    0m0.113s
> > 
> > (on an idle system). If it fluctuates, with occasional longer delays, 
> > there's some timer problem present.
> 
> Does the sleeping and timing use different time references?

yes. But the real paranoid can do this from another box:

  while :; do time ssh testbox usleep 111000; done

	Ingo
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