Bug 23624

Summary: [Bisected] openarena drops more than 25% on G45 and 965GM
Product: Mesa Reporter: zhao jian <jian.j.zhao>
Component: Drivers/DRI/i965Assignee: Eric Anholt <eric>
Status: VERIFIED FIXED QA Contact:
Severity: major    
Priority: high    
Version: unspecified   
Hardware: Other   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:

Description zhao jian 2009-09-01 05:32:22 UTC 
System Environment:
--------------------------
Arch  x86_64  
Platform  G45 965GM  
Libdrm:         (master)73b59c894380995a2889b98e79acadd2da0bb237
Mesa:           (master)241c3a1d8001fc5a30e2af4b4636b48e6f99690a
Xserver:   (server-1.6-branch)3044711412d0a08ba65a491bd2441c0c8980f5e2
Xf86_video_intel:  (master)7c48c21b22bf5862c5a35bda1635753cc5a7197c

Bug detailed description:
-------------------------
The performance of openarena drops about 25%~40% on G45 and GM965. 

This is caused by following commit:
commit 00413d87426f14df47d90ba3c995e1889e9f88ca
Author: Eric Anholt <eric@anholt.net>
Date:   Fri Aug 28 15:01:56 2009 -0700

    i965: Use VBOs in the VBO module on 965, now that we have
ARB_map_buffer_range.

    This looks like it's a small win on blender.

Reproduce steps:
----------------
1.xinit&
2. openarena exec stress_bases3
Comment 1 Eric Anholt 2009-09-02 12:50:59 UTC 
commit cbde2765804a4fc62bcf092230a01376aedbf2cd
Author: Eric Anholt <eric@anholt.net>
Date:   Wed Sep 2 12:17:28 2009 -0700

    Revert "i965: Use VBOs in the VBO module on 965, now that we have ARB_map_bu
    
    This reverts commit 00413d87426f14df47d90ba3c995e1889e9f88ca.  Even with
    fixes, using ARB_map_buffer_range in the VBO module isn't showing up as a
    significant win, and some cases apparently regressed.
    
    Bug #23624.
Comment 2 zhao jian 2009-09-03 18:10:32 UTC 
Yes. It works well now. Verified.

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