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<base href="https://bugs.freedesktop.org/" />
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<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [BYT Regression]3D performance reduced 10%~70%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83793">83793</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BYT Regression]3D performance reduced 10%~70%
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jianx.zhou@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>Platform:BYT-M
Libdrm:(master)libdrm-2.4.56-21-g8c2ae1695913990cbe6c6a8aa294f354eba33bd0
Mesa:(master)5cf8d9f54b2e27721f8c79e553377834b3005022
Xserver:(master)xorg-server-1.16.0-152-g3a51418b2db353519a1779cf3cebbcc9afba2520
Xf86_video_intel:(master)2.99.916-9-gf2b62ab38f0f5970b2f868e10dc3499ff3118dbb
Cairo:(master)8e11a42e3e9b679dce97ac45cd8b47322536a253
Libva:(master)e0d25ece01e7aba819c910e98c4fb4706cdab055
Libva_intel_driver:(master)238d8077705711036d62a6d536311def3ef35035
Kernel:(drm-intel-nightly)72faa6a63351879b381bd9e4013f38bc94f11999
Bug detail description:
-------------------------------------------------------
3D performance reduced 10%~70% on BYT-M,this issue doesn't exist on
IVB/HSW/BDW.
It's kernel regression,i know kernel(drm-intel-nightly) good commit is
git-51c49ea and kernel(drm-intel-nightly) bad commit is git-72faa6a. but i
can't found detail branch.
Reproduced step:
---------------------------------------------------
1. xinit&
2. ./synmark2 OglBatch0</pre>
</div>
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