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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 --- - [IVB/BYT/HSW Bisected]Synmark2_DrvCtx performance reduced 50%~80%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84501">84501</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>[IVB/BYT/HSW Bisected]Synmark2_DrvCtx performance reduced 50%~80%
</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>lilix.cheng@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>Created <span class=""><a href="attachment.cgi?id=107100" name="attach_107100" title="dmesg.log">attachment 107100</a> <a href="attachment.cgi?id=107100&action=edit" title="dmesg.log">[details]</a></span>
dmesg.log
Environment:
-----------------------------------
Platform:IVB/BYT/HSW
Libdrm:(master)libdrm-2.4.58
Mesa:(master)40aabc0e809fa7523606f15c053e0d6ac01d9b9e
Xserver:(master)xorg-server-1.16.0-335-gcc59be38b7eff52a1d003b390f2994c73ee0b3e9
Xf86_video_intel:(master)2.99.916-70-gac492b9af99919d7c579ee4dd636ef6aab90c945
Cairo:(master)fbb0a260b707cb5f02a14cc368c6f2f0d63564c3
Libva:(master)5faa5f50382af6d2f58ba07bbc64d2e9e63abad9
Libva_intel_driver:(master)925c98afcd381e52b37eb3870c3c80ff9c59a069
Kernel:(drm-intel-nightly)7101d84020f63f1da7e0c5d021cdd6be4d515de5
Bug detailed description:
---------------------------------------------
Synmark2_DrvCtx performance reduced 50%~80%on IVB/BYT-M/HSW.
This problem exist both on gnome-session and Raw X.
It's kernel (drm-intel-next-queued)regression,bisect result show first bad
commit is:
commit 1ed26b0b84dab119de93723ad646229db748842d
Author: Michel Thierry <<a href="mailto:michel.thierry@intel.com">michel.thierry@intel.com</a>>
AuthorDate: Fri Sep 5 14:13:16 2014 +0100
Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Mon Sep 8 09:42:19 2014 +0200
drm/i915: Enable full PPGTT on gen7
BTW,this issue also exist on drm-intel-nightly branch.
Please see dmesg.log for detail.
Reproduce steps:
---------------------------------------------
1. xinit&
2. ./synmark2 OglDrvCtx</pre>
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