Re: ATI Radeon 7500 QW; XFree86 4.2.1 (sid)
On Mit, 2002-10-09 at 20:18, John Lenton wrote:
> On Wed, Oct 09, 2002 at 09:39:59AM -0500, Sudhindra Herle wrote:
> >
> > When I ran 'glxgears' I seem to get between 500-2000fps. However, the CPU is
> > maxed out at 100% -- this on an Athlon XP1700. Also, if I move any window on
> > the desktop, the gears seem to stutter and slow down. This leads me to
> > believe that 3D support is done in software. Am I correct?
>
> I don't think you'd reach even 100fps on software. Try it: simply comment
> out (put a '#' infront of) the 'Load "dri"' line in your
> /etc/X11/XF86Config-4.
Or simply set the LIBGL_ALWAYS_INDIRECT environment variable when
running an OpenGL client.
> One thing, however, to note: 2D with the DRI off is faster on the radeon
> than 2D with the DRI working, so if you use 2D a lot more than 3D, you might
> want to consider having the default layout bring up a non-dri-enabled X.
This was true until 4.2 but has been remedied in the meantime. My DRI
CVS snapshot packages provide the same 2D acceleration functions in both
cases, but with DRI enabled they're faster thanks to the CP DMA engine.
Oh, and glxgears won't use 100% CPU running those either thanks to IRQs.
PS: For more info about the DRI go to http://dri.sf.net/
--
Earthling Michel Dänzer (MrCooper)/ Debian GNU/Linux (powerpc) developer
XFree86 and DRI project member / CS student, Free Software enthusiast
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