[Bug 103932] [CI] igt at perf_pmu@multi-client-vcs0 - fail - Failed assertion: (double)(val[1]) <= (1.0 + (tolerance)) * (double)(slept) && (double)(val[1]) >= (1.0 - (tolerance)) * (double)(slept)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103932

Chris Wilson <chris at chris-wilson.co.uk> changed:

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

--- Comment #3 from Chris Wilson <chris at chris-wilson.co.uk> ---
commit 53f2b4b4ce2372da0b3b741d934dd5a9110ac1e2 (HEAD, upstream/master)
Author: Chris Wilson <chris at chris-wilson.co.uk>
Date:   Mon Nov 27 10:52:40 2017 +0000

    igt/perf_pmu: Keep batch_duration_ns as the minimum measurement duration

    We have chosen batch_duration_ns to be the minimum duration we need to
    meet our accuracy requirements for legacy ringbuffer PMU sampling. As
    such, we need to be careful to use multiples of it during tests, and not
    split it into different phases within a test, like multi_client does.

    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
    Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin at intel.com>

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