[Bug 102480] [IGT] [APL/SKL] igt at perf@oa-exponents assertion: timestamp_delta == expected_timestamp_delta

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102480

mwa <matthew.auld at intel.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |NEEDINFO

--- Comment #12 from mwa <matthew.auld at intel.com> ---
The oa-exponents test was recently reworked, might be worth trying:

commit 4a8d621cdf876bd3774cec719fd4e92b77ff86aa
Author: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
Date:   Mon Apr 24 22:28:57 2017 -0700

    tests/perf: rework oa-exponent test

    New issues that were discovered while making the tests work on Gen8+ :

     - we need to measure timings between periodic reports and discard all
       other kind of reports

     - it seems periodicity of the reports can be affected outside of RC6
       (frequency change), we can detect this by looking at the amount of
       clock cycles per timestamp deltas

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