Bug 62144

Summary: [SNB Regression] 6.9% performance regression on 3DMMES2.0/taiji
Product: Mesa Reporter: libo <bo.c.li>
Component: Drivers/DRI/i965Assignee: Ian Romanick <idr>
Status: VERIFIED DUPLICATE QA Contact:
Severity: normal    
Priority: medium    
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description libo 2013-03-11 06:29:14 UTC 
System Environment:
--------------------------
Libdrm: (master)libdrm-2.4.42
Mesa:   (9.1)mesa-9.1
Xserver:(server-1.13-branch)xorg-server-1.13.2.902
Xf86_video_intel:(master)2.21.3
Libva:  (master)libva-1.1.0
Kernel:  3.8

Bug detailed description:
---------------------------
 There are 6.9% regression on 3DMMES2.0/taiji, which caused by Mesa. 

 Bad commit : (9.1)632a5a3a5b24a1c5c72a276b2ba1224af2fd7eb9     30.92 fps       
 Good commit: (9.0)15693b7925ccdd45bbb60b375ce6b7a3f60bfa3e     33.21 fps
 
Reproduce steps:
----------------------------
1.xinit&
2.gnome-session
3.vblank_mode=0 ./taiji.sh
Comment 1 Ian Romanick 2013-03-11 20:00:44 UTC 
This is already fixed by the following commit on the 9.1 branch.

commit 049f343e8ace0057ab5f8218a5c130632964ef71
Author: Ian Romanick <ian.d.romanick@intel.com>
Date:   Fri Feb 22 19:01:40 2013 -0800

    egl: Allow 24-bit visuals for 32-bit RGBA8888 configs
    
    Previously only the 32-bit X visual would match the 32-bit RGBA8888
    configs.  This resulted in every config with alpha getting the "magic"
    visual whose alpha is used by the compositor.  This also resulted in no
    multisample visuals being advertised.  How many ways could we lose?
    
    This patch inverts the problem... now you can't get the visual with
    alpha used by the compositor even if you want it.  I think we need to
    invent a new value for EGL_TRANSPARENT_TYPE that apps can use to get
    this.  I'm surprised that there isn't already a choice for
    EGL_TRANSPARENT_ALPHA.
    
    NOTE: This is a candidate for the 9.1 branch.
    
    Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
    Tested-by: Tian Ye <yex.tian@intel.com>
    Acked-by: Kristian Høgsberg <krh@bitplanet.net>
    Reviewed-by: Chad Versace <chad.versace@linux.intel.com>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=59783
    (cherry picked from commit 68a147e9a9e8f171d9aacdc7d78d2107009c4741)

*** This bug has been marked as a duplicate of bug 59783 ***
Comment 2 libo 2013-03-12 03:12:26 UTC 
Verified！

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