On Maw, 2003-11-25 at 20:26, Michel DÃnzer wrote:
> * Our drivers do something which makes newer chips perform very
> poorly with PCI GART, be they AGP or PCI
>
> The former wouldn't necessarily say anything about PCI cards, but I'm
> not sure how to determine which it is (and what exactly the actual cause
> is).
Is there code reading from PCI space as it builds stuff or uploads
textures. Anything that ends up doing
*pciaddr=foo
[blah]
if(x)
*pciaddr|=FOOFLAG;
kills your performance on PCI bus.
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