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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 --- - [BDW bisected]] Warsow v1.0/Xonotic v0.7/Gputest v0.5_triangle_fullscreen/synmark2_v6 performance reduced 30%~60%"
href="https://bugs.freedesktop.org/show_bug.cgi?id=83046">83046</a>
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<th>Assignee</th>
<td>idr@freedesktop.org
</td>
</tr>
<tr>
<th>Summary</th>
<td>[BDW bisected]] Warsow v1.0/Xonotic v0.7/Gputest v0.5_triangle_fullscreen/synmark2_v6 performance reduced 30%~60%
</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>
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<th>OS</th>
<td>Linux (All)
</td>
</tr>
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<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>
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<th>Product</th>
<td>Mesa
</td>
</tr></table>
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<pre>Platform: BDW
----------------------------------------------
Libdrm: (master)libdrm-2.4.56-10-g22b995d8cbf1059535c5de5ba1869c1623ae5b08
Mesa: (master)8d8a5eb792c662a8def7c9ab65d2df67972cf659
Xserver:
(master)xorg-server-1.15.99.902-121-g2f5cf9ff9a0f713b7e038636484c77f113a5f10a
Xf86_video_intel: (master)2.99.914-67-g12c051d5c673d79c16a3a1478c0977799484ca95
Cairo: (master)13a09526d2120c244471e03b6ae979016ef88e83
Libva: (master)acfcd5f0637a951d50c5112c7dfbd46f1d0dcdb3
Libva_intel_driver: (master)f3f49f2f0e6b3669d9b09341a11cf0b96e138674
Kernel: (drm-intel-nightly)257d90d13794c2eb545ab0d6c708f21e2a0378b6
Bug detailed description:
-----------------------------------------------
Warsow v1.0/Xonotic v0.7/Gputest
v0.5_triangle_fullscreen/synmark2_v6(OglBatch0-OglBatch7/OglGeomPoint)
performance reduced 30%~60% on BDW, This issue only exist on BDW, this issue
exist both on Raw X and gnome-session.
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 OglBatch0</pre>
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