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<body><span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI] igt@perf_pmu@busy*-vcs0 - Failed assertion: (double)(val) <= (1.0 + (tolerance)) * (double)(ts[1] - ts[0]) && (double)(val) >= (1.0 - (tolerance)) * (double)(ts[1] - ts[0]) (perf_pmu:1787) CRITICAL: 'val' != 'ts[1] - ts[0]' (455000000.000000 not"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105106">bug 105106</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>ASSIGNED
</td>
<td>RESOLVED
</td>
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<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
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<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI] igt@perf_pmu@busy*-vcs0 - Failed assertion: (double)(val) <= (1.0 + (tolerance)) * (double)(ts[1] - ts[0]) && (double)(val) >= (1.0 - (tolerance)) * (double)(ts[1] - ts[0]) (perf_pmu:1787) CRITICAL: 'val' != 'ts[1] - ts[0]' (455000000.000000 not"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105106#c7">Comment # 7</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - [CI] igt@perf_pmu@busy*-vcs0 - Failed assertion: (double)(val) <= (1.0 + (tolerance)) * (double)(ts[1] - ts[0]) && (double)(val) >= (1.0 - (tolerance)) * (double)(ts[1] - ts[0]) (perf_pmu:1787) CRITICAL: 'val' != 'ts[1] - ts[0]' (455000000.000000 not"
href="https://bugs.freedesktop.org/show_bug.cgi?id=105106">bug 105106</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Wait, there's more!
commit d502f055ac4500cada758876a512ac4f14b34851
Author: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</a>>
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.
v2:
* Bring back self-adjust. (Chris Wilson)
(But slightly fixed version with no overflow.)
v3:
* Log average and mean calibration for each pass.
v4:
* Eliminate development leftovers.
* Fix variance logging.
Signed-off-by: Tvrtko Ursulin <<a href="mailto:tvrtko.ursulin@intel.com">tvrtko.ursulin@intel.com</a>>
Reviewed-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Presumptively closing.</pre>
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