https://bugs.freedesktop.org/show_bug.cgi?id=88912
Bug ID: 88912
Summary: [IVB bisected] GLBenchmark manhattan performance
reduce by 20% with gnome-session
Product: Mesa
Version: unspecified
Hardware: All
OS: Linux (All)
Status: NEW
Severity: major
Priority: medium
Component: Drivers/DRI/i965
Assignee: idr at freedesktop.org
Reporter: yex.tian at intel.com
QA Contact: intel-3d-bugs at lists.freedesktop.org
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 <topi.pohjolainen at intel.com>
AuthorDate: Wed Jan 28 16:24:25 2015 +0200
Commit: Topi Pohjolainen <topi.pohjolainen at intel.com>
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 <topi.pohjolainen at intel.com>
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>
Reviewed-by: Matt Turner <mattst88 at gmail.com>
---------------------------------------------------------------------
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
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