The Grinch That Stole The Radeon Gallium3D Performance?

[phoronix]

Phoronix: The Grinch That Stole The Radeon Gallium3D Performance?

There are some significant performance drops right now on Mesa master for the forthcoming 7.12/8.0 release concerning the Gallium3D driver for older ATI Radeon graphics processors. The performance of the R300g driver is now setback compared to earlier Mesa releases.

http://www.phoronix.com/vr.php?view=16861

[FireBurn]

Sigh

Phoronix - where articles ARE the bug reports

[FireBurn]

Has anyone else got an r300 card handy to do a quick besect on? I'm running all r600's here

[Michael]

Has anyone else got an r300 card handy to do a quick besect on? I'm running all r600's here

The regressed commits should be published on Christmas.

[ChrisXY]

Also, please compare the visual output. Maybe about three screenshots over the duration of the test.
Just to show whether it's just a performance regression or whether it actually renders more and better.

[przemoli]

You really have to write & publish guide how to compile and test out newest mesa drivers

[FireBurn]

You really have to write & publish guide how to compile and test out newest mesa drivers

git clone git://anongit.freedesktop.org/mesa/mesa

cd mesa

The following is correct for a 64 bit stripped down mesa - make sure you have the 'devel' packages installed on your distro

./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share
--sysconfdir=/etc --localstatedir=/var/lib --libdir=/usr/lib64 --disable-option-checking --enable-dri --enable-glx --enable-xcb --enable-texture-float
--disable-debug --disable-egl --enable-gbm --disable-gles1 --disable-gles2 --enable-glx-tls --disable-osmesa --enable-asm --enable-shared-dricore
--enable-shared-glapi --with-dri-drivers= --with-gallium-drivers=,swrast,r300 --disable-d3d1x --disable-gallium-g3dvl --enable-gallium-llvm --disable-openvg
--disable-vdpau --disable-xvmc

make

WARNING the next line will overwrite [possibly trash] your system's mesa

make install

to bisect:

git bisect start

git bisect bad

this marks the current git head as bad

git bisect good mesa-7.11.2

says we know mesa 7.11.2 worked ok

Then test a game that we know has regressed and for each run mark it as good or bad until it finds the rotten commit

Then make and try again

You shouldn't need to use "make install" but I can't for the life of me remember the environmental override that lefts you do MESAOVERRIDE=/lib/I/just/built mygame

Hope that helps

[hdas]

Off-topic, but the (not so apt or clever) references to Christmas and Holidays in pretty much every article (and even some comments) is a bit over the top for a relatively technical website. (And that's an understatement.)

Merry Christmas and Happy Holidays.

[AnonymousCoward]

You shouldn't need to use "make install" but I can't for the life of me remember the environmental override that lefts you do MESAOVERRIDE=/lib/I/just/built mygame

LD_PRELOAD or LD_LIBRARY_PATH for libgl.so, and LIBGL_DRIVERS_PATH I think.

[FireBurn]

LD_PRELOAD or LD_LIBRARY_PATH for libgl.so, and LIBGL_DRIVERS_PATH I think.

If someone can confirm that I'll update my post