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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 bisected]smokin-guns performance fluctuate by ~15% with gnome-session"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69828">69828</a>
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<th>Assignee</th>
<td>chris@chris-wilson.co.uk
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW mobile bisected]smokin-guns performance fluctuate by ~15% with gnome-session
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Severity</th>
<td>major
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
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<th>OS</th>
<td>Linux (All)
</td>
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<th>Reporter</th>
<td>mengmeng.meng@intel.com
</td>
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<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>Driver/intel
</td>
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<th>Product</th>
<td>xorg
</td>
</tr></table>
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<pre>System Environment:
----------------------------------------------
Libdrm: (master)libdrm-2.4.46-42-gbf4a7cd4b2456d4dc93a86bbcc51eba4ae73390a
Mesa: (master)59157d1c96f33ca56d9aba6cff75145d732dbbab
Xserver:(master)xorg-server-1.14.99.1-215-g7d3d4ae55dd6ee338439e2424a
Xf86_video_intel:(master)2.99.902-47-g63a81c87b1be3607243aaa0acc4cb669fee02b4b
Cairo: (master)337ab1f8d9e29086bfb4001508b28835b41c6390
Kernel: (drm-intel-nightly) 532fcf286aa6feba529587d0288a0097ba8b713e
Bug detailed description:
----------------------------------------------
Smoking-guns performances fluctuate by ~15% enabling gnome-session on HSW
mobile GT3e. It works well with Raw X (xinit). BTW, the problem only exists on
HSW mobile.
It’s Xf86_video_intel regression, bisecting show that the first bad commit is:
commit f296872f373d3439b08e055b03584763e6c2ffec
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Sun Sep 22 17:29:33 2013 +0100
sna/dri: Fix SwapbufferWait
Performance
--------------------------------------------------------------------
Test smoking-guns enabling gnome-session
git- 42330fb: 186.90, 179.90, 181.30, 185.70
git- f296872: 177.80, 174.10, 160.30, 174.50
Reproduce steps:
---------------------------------------------
1, xinit&
2, gnome-session&
3, vblank_mode=0 vblank_mode=0 ./smokinguns.x86_64 +set r_fullscreen 1
+timedemo 1 +set demodone "quit" +set demoloop1 "demo pts; set nextdemo vstr
demodone" +vstr demoloop1 +set r_customwidth 1920 +set r_customheight 1080</pre>
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