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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 --- - [HSW ULT bisected] Glbenchmark2.7.0 EgyptHDoffscreen performance reduce by 10%."
href="https://bugs.freedesktop.org/show_bug.cgi?id=67062">67062</a>
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW ULT bisected] Glbenchmark2.7.0 EgyptHDoffscreen performance reduce by 10%.
</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>yex.tian@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>
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<pre>System Environment:
----------------------------------------------
Platform: HSW ULT
Libdrm: (master)libdrm-2.4.46-2-gfea5408098c3c3057958e85ea9d7146f0b08749e
Mesa: (master)148f0deb065d8b64e15f951063fac40650ac257a
Xserver:
(master)xorg-server-1.14.99.1-137-g74469895e39fa38337f59edd64c4031ab9bb51d8
Xf86_video_intel:(master)2.21.12-12-g6c8b15d321044d4a81cb187cc5e1ac094eb82367
Cairo: (master)03c81d414d4edb710c91f96ddb7dbf73e5432583
Libva: (staging)6ba83cd306629e7579912627edab7a86d8c9ae1c
Libva_intel_driver: (staging)1caf179b1425b13cacaa421c688c6df8369668c6
Kernel: (drm-intel-next-queued)8f588cfc349bbbd8ae62a13679b9efba41645064
Bug detailed description:
----------------------------------------------
Glbenchmark2.7.0 Glbenchmark2.7.0 EgyptHDoffscreen performance reduce by 10% on
HSW ULT.
The problem doesn’t exist on HSW desktop and IVB. please see dmesg and Xorg.0
attached.
It's Kernel(-intel-next-queued) regression. By bisected, show that 0d8ff15e9 is
the first bad commit.
commit 0d8ff15e9a15f2b393e53337a107b7a1e5919b6d
Author: Ben Widawsky <<a href="mailto:benjamin.widawsky@intel.com">benjamin.widawsky@intel.com</a>>
Date: Thu Jul 4 11:02:03 2013 -0700
drm/i915/hsw: Set correct Haswell PTE encodings.
Performance
----------------------------------------------
50b44a4 0d8ff1
EgyptHD_C24Z16_FixedTime_Offscreen 96 86
TRex_C24Z16_FixedTimeStep_Offscreen 56 50
Reproduce steps:
---------------------------------------------
1, xinit&
2, vblank_mode=0 ./GLBenchmark -data ../../data/ -w 1920 -h 1080 -t 2701101</pre>
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