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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 --- - [HSW mobile GT3e Bisected] GLbenchmark v2.7.0 EgyptHD _FixedTime performance reduced by 20%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69870">69870</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>[HSW mobile GT3e Bisected] GLbenchmark v2.7.0 EgyptHD _FixedTime performance reduced by 20%
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux (All)
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mengmeng.meng@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>
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<th>Product</th>
<td>DRI
</td>
</tr></table>
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<pre>System Environment:
----------------------------------------------
Platform: HSW mobile GT3e i7-4950HQ
Libdrm: (master)libdrm-2.4.46-42-gbf4a7cd4b2456d4dc93a86bbcc51eba4ae73390a
Mesa: (master)fe2528c0b69d5719b15d926ada9424cac7569b9c
Xserver: (master)xorg-server-1.14.99.1-215-g7d3d4ae55dd6ee338439e2424a
Xf86_video_intel:(master)2.99.902-54-gd7eb40efa79dd9ea720606b94a20179c7dd18e03
Cairo: (master)337ab1f8d9e29086bfb4001508b28835b41c6390
Libva: (staging)f5c913765e6af38d835cacf339054ccc60bddefb
Libva_intel_driver:(staging)f6685c309d94fb7679c9772703c8790cb71cdd73
Kernel: (drm-intel-nightly) 24c8329416b54b79655afe45370cf3d46f41e283
Bug detailed description:
----------------------------------------------
GLbenchmark v2.7.0 EgyptHD _FixedTime performance reduced by 20% on HSW mobile
GT3e(i7-4950HQ).
The problem doesn’t exist on HSW desktop and another HSW mobile i7-4700MQ .
It’s kernel –dinq regression, bisecting show that the first bad commit is:
commit 0d8ff15e9a15f2b393e53337a107b7a1e5919b6d
Author: Ben Widawsky <<a href="mailto:benjamin.widawsky@intel.com">benjamin.widawsky@intel.com</a>>
Date: Thu Jul 4 11:02:03 2013 -0700
drm/i915/hsw: Set correct Haswell PTE encodings.
Performance
--------------------------------------------------------------------
Test GLbenchmark v2.7.0 EgyptHD _FixedTime on Raw X
drm-intel-next-queued git-50b44a4 git-00d8ff15
183.67 fps 148.67 fps
Reproduce steps:
---------------------------------------------
1, xinit&
2, vblank_mode=0 ./GLBenchmark -data ../../data/ -w 1920 -h 1080 -t 2701100</pre>
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