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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [GEN9+] 14-24% perf drop in SynMark2 v7 CSDof"
href="https://bugs.freedesktop.org/show_bug.cgi?id=109517">109517</a>
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<th>Summary</th>
<td>[GEN9+] 14-24% perf drop in SynMark2 v7 CSDof
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>git
</td>
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<th>Hardware</th>
<td>Other
</td>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
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<th>Reporter</th>
<td>eero.t.tamminen@intel.com
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<p>
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<pre>Mesa performance in SynMark2 v7 CSDof test dropped 24% on SKL GT4e and 14-20%
on other GEN9+ platforms.
Setup:
- Ubuntu 18.04
- Unity / compiz desktop
- Mesa from git
- X server and drm-tip kernel from git within last 1-2 months, with modifier
support enabled
- FullHD monitor
Test-case:
- synmark2 OglCSDof
(configured to run in fullscreen FullHD resolution.)
Regression happened between following commits:
* 2019-01-28 17:50:08 41a0acd6a1: Switch imx to kmsro and remove the imx winsys
* 2019-01-30 17:49:45 f4eb746ef7: r600: add -Wstrict-overflow=0 to meson to
silence the warning
CSDof compute shaders register spill, so a change to register usage (e.g. SENDS
support which is GEN9+ specific) is likely cause for the perf regression.</pre>
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