(solved) memcpy to videoram eats too much CPU on ATI cards

[Peter Surda]

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On Tue, Aug 28, 2001 at 12:01:27AM +0200, Peter Surda wrote:
> So the conclusion is basically that the card can't chew data that fast an=
d I
> should use busmastering instead of memcpy (and other drivers should do th=
at
> too because "hidden load" occurs anyway). I'm working on it.
Just to end this thread in a victorous manner ;-), thanks to Michel D=E4nzer
<[e-mail]> and me, there is now a working implementation of
busmastered video transfers for the r128 driver, and it has been submitted =
to
all relevant lists and maintainers. It indeed solved the problem, CPU time
eaten by video transfers is negligible and DVD and "DivX ;-)" playback was
never so smooth. With software-only DVD decoder, watching fullscreen DVD
leaves 50-60% CPU time idle on a Duron 650, even on action-packed scenes. If
I catch someone claiming again that Linux isn't suitable for multimedia, I =
can
just laugh now :-).

Bye,

Peter Surda (Shurdeek) <[e-mail]>, ICQ 10236103, +436505=
122023

--
               Dudes! May the Open Source be with you.

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