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<base href="https://bugs.freedesktop.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [Regression] x11perf-1.5 performance reduced ~12% with gnome-session"
href="https://bugs.freedesktop.org/show_bug.cgi?id=70948">70948</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>[Regression] x11perf-1.5 performance reduced ~12% with gnome-session
</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>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>unspecified
</td>
</tr>
<tr>
<th>Component</th>
<td>Driver/intel
</td>
</tr>
<tr>
<th>Product</th>
<td>xorg
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=88212" name="attach_88212" title="perf report log">attachment 88212</a> <a href="attachment.cgi?id=88212&action=edit" title="perf report log">[details]</a></span>
perf report log
System Environment:
----------------------------------------------
Platform:IVB/HSW
Libdrm: (master) 2.4.47
Mesa: (master) 7f7636830514ae37b9df9969c44637f55323d608
Xserver:(master) xorg-server-1.14.99.3-1-g7ecfab47eb221dbb996ea6c033
Xf86_video_intel:(master) 2.99.905-14-g64b9f57451501830f8031d1b6ac7289642da032d
Cairo: (master) 98fef3cef2d0f7f463a2e4f9f1b35b09f7b6ea77
Kernel: (drm-intel-nightly) 164a4cb4c1431a0689f85507868356fae24da638
gnome-shell:3.8.4-2
Bug detailed description:
---------------------------------------------
x11perf-1.5 performance reduced ~12% with gnome-session on IVB/HSW . The
problem doesn’t exist on Raw X.
It’s xserver regression. Compiling error when bisected this problem, so can’t
get first bad commit. The recent xserver good commit is git-7d3d4ae.
Please see “perf report log” attached.
Performance on IVB desktop
--------------------------------------------
xinit gnome-session
git-7d3d4ae 25100000 25600000
git-ccbe17b 25100000 22900000
Reproduce steps:
--------------------------------------------------------------------
1. xinit&
2. gnome-session
3. x11perf -aa10text</pre>
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