[Bug 105157] [CI] igt at perf_pmu@busy-accuracy-* - fail - Failed assertion: (double)(busy_r) <= (1.0 + (0.15)) * (double)((double)target_busy_pct / 100.0) && (double)(busy_r) >= (1.0 - (0.15)) * (double)((double)target_busy_pct / 100.0)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105157

Martin Peres <martin.peres at free.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #19 from Martin Peres <martin.peres at free.fr> ---
(In reply to Chris Wilson from comment #18)
> commit d502f055ac4500cada758876a512ac4f14b34851
> Author: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
> Date:   Wed Apr 4 10:51:52 2018 +0100
> 
>     tests/perf_pmu: Avoid RT thread for accuracy test
>     
>     Realtime scheduling interferes with execlists submission (tasklet) so try
>     to simplify the PWM loop in a few ways:
>     
>      * Drop RT.
>      * Longer batches for smaller systematic error.
>      * More truthful test duration calculation.
>      * Less clock queries.
>      * No self-adjust - instead just report the achieved cycle and let the
>        parent check against it.
>      * Report absolute cycle error.

Still visible every single run...

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