Hi,
I'm using a Radeon 7500 (RV200 QW) on an Athlon XP1700+,
but glxgears does only reach about 370-440 fps, which is
(AFAIR on IRC) way below the expected performance for that
machine. I tested both 4.3.0 (Debian pre1v1) and latest
binary DRI on top, but it didn't change much.
I tested both the DRM from 2.6.0-test3 and the DRM that is
shipped with 4.3.0 on top of 2.4.21-bk30.
glxgears tells me that direct rendering is enabled and indeed
the performance drops severely if I use it without DRM (down
to 60 fps). I tried to disable/enable all possible combinations
of driver tweaks (like RADEON_NO_IRQS etc.), but that didn't
help. You can find my X.log, my Xfree-config, glxinfo output
and lspci -vvv at http://www.tzi.de/~jmm/radeon-7500-dri-slowness.tar.gz
I read a posting on linux-kernel that enabling the local APIC on
uniprocessor systems dropped the performance, but disabling that
didn't help either.
As the output from the logs looks sane and my seems system properly
configured I can only suspect that there's a bug in DRI for my
radeon. Does anything in my config look suspicious for you?
Do you need additional data?
TIA,
Moritz
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