[Bug 28550] New: [UMS vs KMS]: Openarena performance drops by half with KMS enabled

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28550

           Summary: [UMS vs KMS]: Openarena performance drops by half with
                    KMS enabled
           Product: Mesa
           Version: unspecified
          Platform: x86 (IA32)
        OS/Version: other
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/R600
        AssignedTo: dri-devel at lists.freedesktop.org
        ReportedBy: hysvats at gmail.com


Created an attachment (id=36284)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=36284)
Xorg.log

KMS Driver Stack details :
=========================

1)    Kernel-2.6.32-21-generic-pae   
2)    Libdrm-2.4.19                               
3)    Mesa-7.8-rc2                                
4)    Xorg-server-1.7.4                      
5)    ddx: xf86-video-ati-6.13.0 


System Environment :
===================

O.S. - Ubuntu-10.04(32bit)
Asic - RV790XT
CPU  - Intel(R) Core(TM)@ 1.86GHz


Steps to Reproduce:
===================

1) Install Phoronix-test-suite from 
http://www.phoronix-test-suite.com/releases/repo/pts.debian/files/phoronix-test-suite_2.6.1_all.deb



2) Install openarena game
   phoronix-test-suite install openarena


3) Run the game with 1920x1080 
   phoronix-test-suite run openarena



Observation :
=============

1) FPS observed is 60.2 
2) Disable KMS and run the test again with the same resolution 
   With UMS FPS is 118.4 
3) Bloom option is disabled before running both the tests.

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