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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-M Bisected]x11perf –aa10text performance reduced ~78%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=71117">71117</a>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BYT-M Bisected]x11perf –aa10text performance reduced ~78%
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-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>
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<th>Reporter</th>
<td>jianx.zhou@intel.com
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
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<th>Product</th>
<td>xorg
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=88467" name="attach_88467" title="Perf report for bad commit">attachment 88467</a> <a href="attachment.cgi?id=88467&action=edit" title="Perf report for bad commit">[details]</a></span>
Perf report for bad commit
System Environment:
----------------------------------------------
Platform: BYT-M
Libdrm:(master)2.4.47-2-g45810d3d7546f3ddbcdae114c6726ada30e919c9
Mesa: (master)git-8bd4476
Xserver: (master)xorg-server-1.14.99.3-24-g902ff0b3497d20
Xf86_video_intel: (master)2.99.905-41-ged16e34c00d5eb5c
Cairo: (master)98fef3cef2d0f7f463a2e4f9f1b35b09f7b6ea77
Kernel: (drm-intel-nightly) 164a4cb4c1431a
Bug detailed description:
----------------------------------------------
X11perf –aa10text performance reduced ~78% on Raw X and gnome-session. The
problem only exists on BYT-M.
It’s Xf86_video_intel regression, bisecting show that the first bad commit is:
40d4199f151a39ecebf127cf468b4470d2906f4e
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Mon Oct 28 10:45:52 2013 +0000
sna: Use page-count for mappable aperture size
For consistency with the other aperture metrics and correctness when
passing around required number of pages.
Signed-off-by: Chris Wilson <a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>
Performance
--------------------------------------------------------------------
X11perf –aa10text on Raw X
drm-intel-next-queued git-40d4199 git-9266e35
1490000 6860000
Reproduce steps:
---------------------------------------------
1, xinit&
2, vblank_mode=0 x11perf –a10text</pre>
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