On Maw, 2005-09-13 at 12:24 +1000, Tim Long wrote:
> I have tracked down the orignal paper on the subject online at:
> http://www.cs.virginia.edu/~gfx/Courses/2002/BigData/papers/The%
> 20Graphics%20Pipeline/Virtual%20Graphics.pdf

SGI were doing it before that paper, years before. I think Mark
Kilgard's original direct render paper discusses it a little

> 
> I am wondering if any PC level hardware implements the same features?
> For the ones that don't what sort of performance impact does it take
> switch GL threads if the pipeline has to be flushed on a context
> switch. 

Ideally you flush the pipeline when someone else has to be given a
context and this is the oldest. The same is done at low levels for MMU
tags and the like.  That way context flushing rates are much lower



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