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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 --- - [IVB/BYT-M/HSW Bisected]Synmark2_V6.0(OglDrvCtx) performance reduced ~15%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=82753">82753</a>
</td>
</tr>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[IVB/BYT-M/HSW Bisected]Synmark2_V6.0(OglDrvCtx) performance reduced ~15%
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-3d-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>jianx.zhou@intel.com
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Version</th>
<td>unspecified
</td>
</tr>
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<th>Component</th>
<td>Drivers/DRI/i965
</td>
</tr>
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<th>Product</th>
<td>Mesa
</td>
</tr></table>
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<pre>Platform: IVB/BYT/HSW
Libdrm: (master)libdrm-2.4.56-8-gd9ce09de12131fa8c5ff2d7c2dbd6b61d8a5fd14
Mesa: (master)ef130b6050fc91c12a220f19d8bdd659712f7fb9
Xserver:
(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113a5f10a
Xf86_video_intel: (master)2.99.914-55-gf8e632f396bf4b0473dca0516567d56a29954cf3
Cairo: (master)7736d08e22ffd7ab9968617164c7e027125b7755
Libva: (master)acfcd5f0637a951d50c5112c7dfbd46f1d0dcdb3
Libva_intel_driver: (master)82d2ed8d7da3619c0ea467c06604f5626fc0b901
Kernel_version: drm-intel-nightly(git-186631)
Bug detailed description:
----------------------------------------------
Synmark2_V6.0_OglDrvCtx performance reduced ~15% on IVB/BYT-M/HSW, this issue
doesn't exist on BDW, The problem exists both on gnome-session and Raw X.
It’s Mesa regression, bisecting show that the first bad commit is:
commit 2f28a0dc23165123cf1e8b5942acad37878edd8a
Author: Kristian Høgsberg <<a href="mailto:krh@bitplanet.net">krh@bitplanet.net</a>>
AuthorDate: Mon Jul 7 16:44:58 2014 -0700
Commit: Kristian Høgsberg <<a href="mailto:krh@bitplanet.net">krh@bitplanet.net</a>>
CommitDate: Fri Aug 15 11:25:47 2014 -0700
i965: Implement fast color clears using meta operations
Reproduce steps:
---------------------------------------------
1. xinit&
2. ./synmark2 OglDrvCtx</pre>
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