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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [All Regression]X11perf/ Gputest_v0.5_triangle_windows_640x480 case performance dropped by 12%--60%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=93622">93622</a>
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<th>Summary</th>
<td>[All Regression]X11perf/ Gputest_v0.5_triangle_windows_640x480 case performance dropped by 12%--60%
</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>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>idr@freedesktop.org
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<th>Reporter</th>
<td>wendy.wang@intel.com
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<pre>Created <span class=""><a href="attachment.cgi?id=120852" name="attach_120852" title="xorg.log">attachment 120852</a> <a href="attachment.cgi?id=120852&action=edit" title="xorg.log">[details]</a></span>
xorg.log
System Environment:
Regression: Yes
Platform: All the platforms(IVB/HSW/BYT/BSW/SKL)
Description:
When we run Gputest_v0.5_triangle_windows_640x480 case with bad test
environment, we've found performance fps dropped by 12%.
And check 2D_X11perf_V1.5_aa10text and 2D_X11perf_V1.5_aa10text has more drop
from 15%--60%.
we try to do below steps to dig out which driver caused it:
1. compile good mesa/xf86/xserver onto the bad environment, performance fps
still bad.
2. Switch to the good kernel on the bad environment, performance fps is bad
3. Start gnome-session: performance is bad running with bad environment.
4. without start gnome-session: performance is good running with bad
environment.
so seems like gnome-session related, we've no idea which driver impacted it.
Bad test environment:
Ubuntu 14.04 LTS
gnome-session 3.9.90
Kernel:4.4-rc8-drm-intel-nightly-0417da
Mesa: 86fa484
xf86: 2.99.917-523-g082a57e
xserver: 1.18.99.1
Good test environment:
Ubuntu 14.04 LTS
gnome-session 3.9.90
Kernel:4.4-rc6-drm-intel-nightly-ec0382
Mesa: dfce975
xf86: 2.99.917-517-gbc4ffba
xserver: 1.18.99.1
Reproduce steps:
1. xinit &
2. gnome-session &
3. ./GpuTest /test=triangle /width=640 /height=480 /fullscreen /benchmark
/no_scorebox
xorg attached.</pre>
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