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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [SKL/BSW/BDW Bisected]Synmark2_v6 OglBatch6/7 and OglDrvState performance reduced by 8%-24%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=90224">90224</a>
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<th>Summary</th>
<td>[SKL/BSW/BDW Bisected]Synmark2_v6 OglBatch6/7 and OglDrvState performance reduced by 8%-24%
</td>
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<th>Product</th>
<td>DRI
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>Other
</td>
</tr>
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<th>OS</th>
<td>All
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
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<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>
<tr>
<th>Reporter</th>
<td>wendy.wang@intel.com
</td>
</tr>
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<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=115426" name="attach_115426" title="dmesg file">attachment 115426</a> <a href="attachment.cgi?id=115426&action=edit" title="dmesg file">[details]</a></span>
dmesg file
==System Environment==
--------------------------
Kernel Regression: YES
Non-working platforms: BDW/BSW/SKL
Used GFX SW Stack:
Libdrm:
(master)libdrm-2.4.60-34-g0d78b37b1cac304ce5e84d1207f0a43abd29c000
Mesa: (master)d5a15a89f081bdd23237b8ba5391a2ebea60468b
Xserver:
(master)xorg-server-1.17.0-76-gb1029716e41e252f149b82124a149da180607c96
Xf86_video_intel:
(master)2.99.917-287-g09d8e5e1b3215c0e58c2ce44048458152c523270
Cairo: (master)2cf2d8e340a325adb205baf8e4bd64e1d1858008
==kernel==
Bisect from drm-intel-next-queued branch, the first bad commit show as below:
commit 9258811c961879450502f767773227f5c0d79120
71b7e54f71b899db9f8def67a0e976969384e699
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
AuthorDate: Tue Apr 14 17:35:19 2015 +0200
Commit: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
CommitDate: Thu Apr 23 21:06:02 2015 +0200
drm/i915: Don't use atomics for pg_dirty_rings
It's already protected by the bkl^Wdev->struct_mutex. While at it
realign some related code.
Reviewed-by: Mika Kuoppala <<a href="mailto:mika.kuoppala@intel.com">mika.kuoppala@intel.com</a>>
Signed-off-by: Daniel Vetter <<a href="mailto:daniel.vetter@intel.com">daniel.vetter@intel.com</a>>
==Bug detailed description==
BDW Platform, synmark2_6 OglBatch6 performance dropped by 12%, OglBatch7
performance dropped by 22%
SKL platform, synmark2_6 OglBatch6 performance dropped by 21%, OglBatch7
performance dropped by 24%
==Reproduce steps==
1. cd /usr/local/games/OpenGL/SynMark2
2. ./synmark2 OglBatch6
Dmesg file has been attached.</pre>
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