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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 --- - [IVB/HSW/BYT-M Bisected]3D ( SynMark2_v5.3.0 /SynMark2_v6.0 /Lightsmarkv2008 &/warsow_v1.0 /GLBenchmarkv2.7.0) performance reduced 20%~70%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80792">80792</a>
</td>
</tr>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[IVB/HSW/BYT-M Bisected]3D ( SynMark2_v5.3.0 /SynMark2_v6.0 /Lightsmarkv2008 &/warsow_v1.0 /GLBenchmarkv2.7.0) performance reduced 20%~70%
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
</td>
</tr>
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<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>git
</td>
</tr>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
</tr></table>
<p>
<div>
<pre>System Environment:
----------------------------------------------
Platform: IVB/HSW/BYT-M
Libdrm:(master)libdrm-2.4.54-17-ge8c3c1358ecaf4e90f7d43762357
Mesa:(master)1bfc0a11027449ae7ab7c28eb695f26de530eccf
Xserver:(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e0386364
Xf86_video_intel: (master)2.99.912-200-ge6e5330857097eb2caafa89d571d12e
Cairo: (master)550385fb004e6064305518cf265adc03bd2d0c0b
Libva: (master)c61d8c6ce9ffc27320e9e177c1e1123d5f1b5014
Libva_intel_driver:(master)c5cb17ea86f0065a939d3636dd26651c93d497c8
Kernel:(drm-intel-nightly) git-a7665f
Bug detailed description:
----------------------------------------------
3D ( SynMark2_v5.3.0 /SynMark2_v6.0 /Lightsmarkv2008 &/warsow_v1.0
/GLBenchmarkv2.7.0) performance reduced 20%~70% on IVB/BYT-M/HSW,It works well
on BDW.
The problem exists both on gnome-session and Raw X.
It’s Mesa regression.By bisected show first bad commit is:
3178d2474ae5bdd1102fb3d76a60d1d63c961ff5
Author: Iago Toral Quiroga <<a href="mailto:itoral@igalia.com">itoral@igalia.com</a>>
AuthorDate: Tue Jun 17 13:45:18 2014 +0200
Commit: Iago Toral Quiroga <<a href="mailto:itoral@igalia.com">itoral@igalia.com</a>>
CommitDate: Mon Jun 30 08:08:50 2014 +0200
i965: Implement GL_PRIMITIVES_GENERATED with non-zero streams.
Reproduce steps:
---------------------------------------------
1. xinit&
2. vblank_mode=0 ./backend silent 1920x1080</pre>
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