[Bug 102480] [IGT] [APL/SKL] igt at perf@oa-exponents assertion: timestamp_delta == expected_timestamp_delta
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Wed Oct 18 22:03:07 UTC 2017
https://bugs.freedesktop.org/show_bug.cgi?id=102480
mwa <matthew.auld at intel.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
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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