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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [HSW mobile bisected]Unigine-heaven performance reduce by 12% with gnome-session"
href="https://bugs.freedesktop.org/show_bug.cgi?id=89402">89402</a>
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<th>Summary</th>
<td>[HSW mobile bisected]Unigine-heaven performance reduce by 12% with gnome-session
</td>
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>Linux (All)
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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>idr@freedesktop.org
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<th>Reporter</th>
<td>yex.tian@intel.com
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<th>CC</th>
<td>mattst88@gmail.com
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<pre>System Environment:
Platform: HSW mobile
Kernel: 3.19.0-rc7+
Libdrm: (master)libdrm-2.4.59-20-g7cb1d6e2d6c63e3bc4b275ff073152b550ba5b0f
Mesa: (master)599cbe5508ccb246fe06b64116c84ce976165fed
Xserver:(master)xorg-server-1.17.0-16-g3a06faf3fcdb7451125a46181f9152e8e59e9770
Xf86_video_intel:(master)2.99.917-145-g127aae5a72a69df325fed0b63d345e81583d5ca1
Bug detailed description:
--------------------------------------------------
Unigine-heaven performance reduce by 12% with gnome-session on HSW mobile,
reduce by 6.5% on HSW desktop.
It’s Mesa regression. By bisected, show that 2dad1e3a is the first bad commit.
commit 2dad1e3abdb1ad153289455f3e273101e5bac1a8
Author: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
AuthorDate: Wed Feb 12 11:00:46 2014 -0800
Commit: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
CommitDate: Tue Feb 17 20:44:09 2015 -0800
i965/fs: Add pass to combine immediates.
total instructions in shared programs: 5885407 -> 5940958 (0.94%)
instructions in affected programs: 3617311 -> 3672862 (1.54%)
helped: 3
HURT: 23556
GAINED: 31
LOST: 165
... but will allow us to always emit MAD instructions.
Reviewed-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Please see Xrog.0.log.
Reproduce steps:
----------------------------
1, xinit&
2, gnome-session&
3, vblank_mode=0 ./bin/heaven_x64 -video_app opengl -data_path ../ -sound_app
null -engine_config ../data/heaven_4.0.cfg -system_script heaven/unigine.cpp
-video_mode -1 -video_fullscreen 1 -extern_define PHORONIX,RELEASE -video_width
1920 -video_height 1080</pre>
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