<html>
<head>
<base href="https://bugs.freedesktop.org/" />
</head>
<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 --- - [HSW bisected] cairo-trace/firefox-planet-gnome.trace performance reduce ~35% on Ubuntu"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72023">72023</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW bisected] cairo-trace/firefox-planet-gnome.trace performance reduce ~35% on Ubuntu
</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>
<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>DRM/Intel
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr></table>
<p>
<div>
<pre>System Environment:
----------------------------------------------------------------------
Platform: HSW (OS:Ubuntu)
Libdrm: (master)libdrm-2.4.49
Mesa:(master)90d185544c897ca0b4c3c677fed4290330bb0706
Xf86_video_intel:(master)2.99.906-28-g12e9
Cairo: (master)31eff5c6eb57ad379689748fd8c60a5ffe0ba481
Kernel: (drm-intel-nightly) 164a4cb4c1431a0689f85507868356fae24da638
Bug detailed description:
cairo-trace/firefox-planet-gnome.trace performance reduce ~35% on HSW Ubuntu.
Especially, it works well on HSW Fedora. The problem also doesn’t exist on
IVB(Fedora & Ubuntu).
It’s kernel –dinq regression. By bisected, show that the first bad commit:
commit cbaef0f173c7c8bb14976f3928e5876efec444e2
Author: Ville Syrjälä <<a href="mailto:ville.syrjala@linux.intel.com">ville.syrjala@linux.intel.com</a>>
Date: Wed Nov 6 23:02:24 2013 +0200
drm/i915: Set has_fbc=true for all SNB+, except VLV
Performance
--------------------------------------------
drm-intel-fixes : 1.75
drm-intel-next-queued:2.849
drm-next:1.756
nightlytop:2.847
Reproduce steps:
--------------------------------------------------------------------
1. xinit&
2. vblank_mode=0 CAIRO_TEST_TARGET=xlib perf/cairo-perf-trace -i 6
/home/cairo-traces/benchmark/firefox-planet-gnome.trace</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are the QA Contact for the bug.</li>
<li>You are on the CC list for the bug.</li>
<li>You are the assignee for the bug.</li>
</ul>
</body>
</html>