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-t...
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.
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
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
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 ---
- FPS observed is 60.2
It's because KMS is limiting rendering to the refresh rate of your monitor to avoid tearing.
- 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.
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)
- 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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