[LTP] [PATCH v2] [RFC] pselect01: Tune thresholds

[Jan Stancek <jstancek@redhat.com>]

----- Original Message -----
> Hi!
> > > New measure script attached, now with gnuplot frequency graphs.
> > > 
> > > Can you, pretty please run that on the slow x86 machine, so that we know
> > > if the failure is caused by a few outliners of if the measured times are
> > > simply skeewed there?
> > 
> > Attached.
> 
> Hmm, strange, it looks like for 100us we got more or less all samples
> close to 160us but for 500us half of the samples are close to 560us and
> about 400 is more than 1000us, that does not look right. I wonder what
> happens there. And the same for the rest of the measurements everything
> but 100us sleeps has two peaks that are more or less 500us apart. So far
> my machines, even VMs, had one peak and some outliners.
> 
> Can you try to rerun the test with a realtime priority?

Ran as "chrt -f 50 ./measure", results attached.

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