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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 ULT]rc6 poor management when running video workload"
href="https://bugs.freedesktop.org/show_bug.cgi?id=65395">65395</a>
</td>
</tr>
<tr>
<th>CC</th>
<td>gordon.jin@intel.com, lianyuex.yang@intel.com, ouping.zhang@intel.com, tienan.liu@intel.com
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[HSW ULT]rc6 poor management when running video workload
</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>All
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tienan.liu@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</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-ult
Libdrm:
(master)libdrm-2.4.45-3-g3586337f3703ce4833a375f66b08df064a1cec28
Mesa: (9.1)cbe0e50247c909a7d34f71d9a1a4852b6c3af472
Xserver: (master)7e97166c4fc38076b6224e4dbdd632b43444149f
Xf86_video_intel: (master)2.21.6-47-gd6c30d1d4df6bcdfa075bd29da7c8aabee20774c
Cairo: (master)631bf299256e11a17511977f357e0353fb5615f7
Libva: (master)32e44bcf45ee0f4a345ccaedda1d45079e8186ed
Libva_intel_driver: (master)31caada2967b94705d78ab7f6d07965ad7f13d42
Kernel : 3.9.3
Test result:
----------------------------------------
workloads RC6 disable average_watt RC6 enable average_watt
idle 18.3 14.5
video 18.6 18.6
game 23.9 22.7
finding:
----------------------------------------
On the platform of HSW-ult, RC6 saved 3.8w when running idle, and saved 1.2w
when running game, but did not save any power on video.</pre>
</div>
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