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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>
         </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>---
           </td>
           <td>FIXED
           </td>
         </tr></table>
      <p>
        <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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