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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [IVB bisected] GLBenchmark manhattan performance reduce by 20% with gnome-session"
href="https://bugs.freedesktop.org/show_bug.cgi?id=88912">88912</a>
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<th>Summary</th>
<td>[IVB bisected] GLBenchmark manhattan performance reduce by 20% with gnome-session
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<th>Product</th>
<td>Mesa
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
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<th>OS</th>
<td>Linux (All)
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>major
</td>
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<th>Priority</th>
<td>medium
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<th>Component</th>
<td>Drivers/DRI/i965
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<th>Assignee</th>
<td>idr@freedesktop.org
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<th>Reporter</th>
<td>yex.tian@intel.com
</td>
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<th>QA Contact</th>
<td>intel-3d-bugs@lists.freedesktop.org
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<pre>System Environment:
Platform: IVB
Kernel: (drm-intel-nightly)8b4216f91c7bf8d3459cadf9480116220bd6545e
Libdrm: (master)libdrm-2.4.59-6-g28ee135a37e10b9a6cd62d67df0332e38ee0b85c
Mesa: (master)6094619c0297180db218e5b4e45fc07aff116413
Xserver:
(master)xorg-server-1.16.99.902-4-g697b696e5e24d0679f133183a3bb0852025377c2
Xf86_video_intel: (master)2.99.917-75-g6d2754b1902e8bce37818c854fb890400b27343e
Cairo: (master)cca8b1960b0091c53235d9dc4cde8a33010c5bbf
Libva: (master)f9741725839ea144e9a6a1827f74503ee39946c3
Libva_intel_driver: (master)bf324e3440246a487997a1624ac862e3e4027f9e
Bug detailed description:
--------------------------------------------------
GLBenchmark manhattan performance reduce by 20% with gnome-session on IVB.
It’s Mesa regression. By bisected, show that 4c157d34 is the first bad commit.
commit 4c157d34c0163ab2389d74181121950aaf0ef121
Author: Topi Pohjolainen <<a href="mailto:topi.pohjolainen@intel.com">topi.pohjolainen@intel.com</a>>
AuthorDate: Wed Jan 28 16:24:25 2015 +0200
Commit: Topi Pohjolainen <<a href="mailto:topi.pohjolainen@intel.com">topi.pohjolainen@intel.com</a>>
CommitDate: Fri Jan 30 09:54:53 2015 +0200
meta/blit: Add plumbing for shaders without depth
Currently all blit programs are unconditionally compiled with
gl_FragDepth.
Signed-off-by: Topi Pohjolainen <<a href="mailto:topi.pohjolainen@intel.com">topi.pohjolainen@intel.com</a>>
Reviewed-by: Kenneth Graunke <<a href="mailto:kenneth@whitecape.org">kenneth@whitecape.org</a>>
Reviewed-by: Matt Turner <<a href="mailto:mattst88@gmail.com">mattst88@gmail.com</a>>
---------------------------------------------------------------------
604ae33c is 4c157d34 parents commit.
4c157d34 604ae33c 4c157d34 VS. 604ae33c
gnome-session 24.5 30.6 19.93%
Please see Xrog.
Reproduce steps:
----------------------------
1, xinit&
2, gnome-session&
3, export MESA_GLSL_VERSION_OVERRIDE=400
export MESA_GL_VERSION_OVERRIDE=4.1
4 ./mainapp -t gl_manhattan -fullscreen 1 -w 1920 -h 1080</pre>
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