On Mon, 2003-09-01 at 20:41, Jouni Tulkki wrote:
> 
> I tried enabling AGP Fast Writes and the performance increased. But my system 
> also got unstable. After reading about Fast Writes I came to the conclusion 
> that it is quite a problematic feature sometimes.

Indeed, that's why it's disabled in the XFree86 driver by default.

> If I understood right, Fast Writes works so that cpu can send data directly to 
> the graphics card. Wouldn't the fastest way to transmit data be to tell the 
> card to load the data from main memory? This way the cpu wouldn't have to wait 
> for the copying to finish and could something else at the same time.

Possibly, but a problem is that the server doesn't receive the image
data in the AGP aperture, so an extra copy is still needed.


-- 
Earthling Michel Dänzer   \  Debian (powerpc), XFree86 and DRI developer
Software libre enthusiast  \     http://svcs.affero.net/rm.php?r=daenzer



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