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

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

[bugzilla-daemon]

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@lists.freedesktop.org
        ReportedBy: hysvats@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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[Bug 28550] [UMS vs KMS]: Openarena performance drops by half with KMS enabled

[bugzilla-daemon]

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

--- Comment #1 from samit vats <hysvats@gmail.com> 2010-06-15 05:39:54 PDT ---
Created an attachment (id=36285)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=36285)
xorg.conf

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

[bugzilla-daemon]

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

--- Comment #2 from samit vats <hysvats@gmail.com> 2010-06-15 05:40:16 PDT ---
Created an attachment (id=36286)
 --> (https://bugs.freedesktop.org/attachment.cgi?id=36286)
glxinfo

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

[bugzilla-daemon]

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

--- Comment #3 from Andy Furniss <lists@andyfurniss.entadsl.com> 2010-06-15 07:36:39 PDT ---

> 1) FPS observed is 60.2 

It's because KMS is limiting rendering to the refresh rate of your monitor to
avoid tearing.

> 2) Disable KMS and run the test again with the same resolution 
>    With UMS FPS is 118.4 

I always thought the pts demo was not as good as the anholt one for openarena -
too long and mostly not enough going on so that the average fps gets pulled up
by easy scenes that are 100-200fps.

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

[bugzilla-daemon]

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

Andreas Boll <andreas.boll.dev@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |NOTABUG

--- Comment #4 from Andreas Boll <andreas.boll.dev@gmail.com> 2012-09-12 15:44:29 UTC ---
(In reply to comment #3)
> > 1) FPS observed is 60.2 
> 
> It's because KMS is limiting rendering to the refresh rate of your monitor to
> avoid tearing.
> 

Closing.

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