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<body><span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW - ~10% perf drop in Sascha Willems Vulkan Multithreading demo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109055">bug 109055</a>
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<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Keywords</td>
<td>
</td>
<td>regression
</td>
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<td style="text-align:right;">Blocks</td>
<td>
</td>
<td>109535
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - ~10% perf drop in Sascha Willems Vulkan Multithreading demo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109055#c2">Comment # 2</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - ~10% perf drop in Sascha Willems Vulkan Multithreading demo"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109055">bug 109055</a>
from <span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span></b>
<pre>In more detail:
* BDW-i3 GT2 (256KB, 3MB LLC), BSW and BXT didn't regress originally, and
improved clearly between commits indicated in above comment
* There was no improvement on HSW-7 GT2 (1024KB, 8MB LLC), SKL-i7 GT4e (1024KB,
6MB LLC), KBL-i7 GT3e (512KB, 4MB LLC), and I don't have data on whether they
regressed originally
* Original regression was large on SKL-i5 GT2 (1024KB, 6MB LLC), SKL-i5 GT3e
(512KB, 4MB LLC), KBL-i7 GT2 (512KB, 4MB LLC). SKL GT3e didn't improve, others
did
Current status for things on which I still have data that they had clearly
regressed originally:
* SKL & KBL GT2: 10-15% behind original perf
* SKL GT3e: ~20% behind original perf
There's some possible confusion here due to our build server and other changes
happening at same time with v4.20-rc kernel STIBP mitigations. If somebody can
confirm the regressions that would be nice.
I'm fine with WONTFIX or WORKSFORME resolutions though, Vulkan multithreading
isn't very interesting use-case (at least yet).</pre>
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</p>
<div id="referenced">
<hr style="border: 1px dashed #969696">
<b>Referenced Bugs:</b>
<ul>
<li>
[<a class="bz_bug_link
bz_status_NEW "
title="NEW - [Tracker] Mesa 19.0 release tracker"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109535">Bug 109535</a>] [Tracker] Mesa 19.0 release tracker
</li>
</ul>
</div>
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