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<base href="https://bugs.freedesktop.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [BSW bisected] lightsmark performance decrease"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90112">90112</a>
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<th>Summary</th>
<td>[BSW bisected] lightsmark performance decrease
</td>
</tr>
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<th>Product</th>
<td>DRI
</td>
</tr>
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<th>Version</th>
<td>DRI git
</td>
</tr>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
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<th>Component</th>
<td>DRM/Intel
</td>
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<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>Reporter</th>
<td>hengx.ding@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
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<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=115206" name="attach_115206" title="dmesg">attachment 115206</a> <a href="attachment.cgi?id=115206&action=edit" title="dmesg">[details]</a></span>
dmesg
System Environment:
--------------------------
Regression: yes
Platform: BSW
kernel: drm-intel-nightly: 5ea91de4ff45adb60031853d64314c3405378fbd(2015-04-15)
Bisect result
1854d5ca0dd7a9fc11243ff220a3e93fce2b4d3e is the first bad commit commit
1854d5ca0dd7a9fc11243ff220a3e93fce2b4d3e
Author: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Date: Tue Apr 7 16:20:32 2015 +0100
drm/i915: Deminish contribution of wait-boosting from clients
With boosting for missed pageflips, we have a much stronger indication
of when we need to (temporarily) boost GPU frequency to ensure smooth
delivery of frames. So now only allow each client to perform one RPS boost
in each period of GPU activity due to stalling on results.
Signed-off-by: Chris Wilson <<a href="mailto:chris@chris-wilson.co.uk">chris@chris-wilson.co.uk</a>>
Cc: Deepak S <<a href="mailto:deepak.s@linux.intel.com">deepak.s@linux.intel.com</a>>
Reviewed-by: Deepak S <<a href="mailto:deepak.s@linux.intel.com">deepak.s@linux.intel.com</a>>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
:040000 040000 1712eed4c716325d29cf054c64636c06a8e5fb14
ff5070b8d3d083464faa37a4712e2a9b3084fb24 M drivers
Bug detailed description:
-----------------------------
lightsmark performance decreased by about 15-20%.
Reproduce steps:
---------------------------
run lightsmark case and check the performance difference.</pre>
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