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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 --- - [BDW]90% CPU usage at on one of the CPU cores when run Synmark2_v5_3_0_OglDrvCtx"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80784">80784</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>[BDW]90% CPU usage at on one of the CPU cores when run Synmark2_v5_3_0_OglDrvCtx
</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>mengmeng.meng@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>XOrg CVS
</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: BDW
Libdrm:(master)libdrm-2.4.54-17-ge8c3c1358ecaf4e90f7d43762357ae6f8e2022b6
Mesa:(master)1bfc0a11027449ae7ab7c28eb695f26de530eccf
Xf86_video_intel:(master)2.99.912-200-ge6e5330857097eb2caafa89d571d12e4bb15f539
Cairo:(master)550385fb004e6064305518cf265adc03bd2d0c0b
Libva:(master)c61d8c6ce9ffc27320e9e177c1e1123d5f1b5014
Libva_intel_driver:(master)c5cb17ea86f0065a939d3636dd26651c93d497c8
Kernel: (drm-intel-nightly)git-9bfcb9
Bug detailed description:
------------------------------------------------------------------------
Compared with HSW, BDW 90% CPU usage at on one of the CPU cores when run
Synmark2_v5_3_0_OglDrvCtx. And BDW OglDrvCtx performance is slower by 26% than
HSW.
The issue is not a regression and exists on all kernel branches:
-drm-intel-nightly bad
commit a7665faa31dbbbae25e376508a9b3781e25d09e2
Author: Jani Nikula <<a href="mailto:jani.nikula@intel.com">jani.nikula@intel.com</a>>
Date: Mon Jun 30 13:50:19 2014 +0300
drm-intel-nightly: 2014y-06m-30d-13h-49m-54s integration manifest
-drm-intel-fixes bad
commit 84b4e042c4707bd1bf05094a51111403d680dc39
Author: Jesse Barnes <<a href="mailto:jbarnes@virtuousgeek.org">jbarnes@virtuousgeek.org</a>>
Date: Wed Jun 25 08:24:29 2014 -0700
drm/i915: only apply crt_present check on VLV
-drm-intel-next-queued bad
commit 91565c85b66db820f01894a971d39aaef60c4325
Author: Matt Roper <<a href="mailto:matthew.d.roper@intel.com">matthew.d.roper@intel.com</a>>
Date: Tue Jun 24 17:05:02 2014 -0700
drm/i915: Don't try to look up object for non-existent fb
CPU and GPU on BDW
-------------
- ~90% CPU usage at least on one of the CPU cores,"according to "top" (press 1
to see all cores)
- clearly <100% "render" value in "intel_gpu_top"
Reproduce steps:
--------------------------------------------------------------------
1. xinit&
2../synmark2 OglDrvCtx
3. top(get "top" output from during that test run (not from first 5 secs of
calibration, but after that)</pre>
</div>
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