[Bug 34493] r600g performance regression introduced by 467023e8 ( Marek Olšák : r600g: use the same upload buffer for vertices, indices, and constants)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=34493

--- Comment #7 from Dave Witbrodt <dawitbro at sbcglobal.net> 2011-04-11 20:15:46 PDT ---
I have been away from Linux and testing radeon support since the Japan crisis
began.  Updating to Mesa 7.11.0-devel, commit a26121f3, caused the same
slowdown I had observed before:  min/max framerate in 'torcs' dropped from
28/54 fps to 17/34 fps.  I was planning on restoring local packages of my last
fast-working Mesa, but decided to rebuild my entire X stack against my newly
updated kernel (updated from 2.6.38-rc8 to 2.6.38.2).

To my shock, I found that replacing xorg-server 1.9.99.903 with 1.10.0.902 and
updating the radeon driver to the latest git version, 6.14.99-devel, commit
cc7d1fa3 -- both built against the Mesa mentioned above -- improved Mesa
performance in 'torcs' dramatically.  It is no longer as consistently high as I
was getting, but gives me 17/54 fps.

I also notice that another test program, 'prboom-plus', has dramatically
improved performance all around.  As a result, I am abandoning my local git
branch where I intended to pin down the exact cause of the performance changes
-- I haven't touch it for 7 weeks anyway -- and start following the Mesa HEAD
again.

Sorry for the false alarm.  It appears that Mesa changes alone were not to
blame for whatever performance problems I was experiencing.

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