[Open-graphics] Address space

[Jon Smirl]

On 8/25/06, Timothy Miller <theosib at gmail.com> wrote:
> I've done all this before, and I can assure you that MANY commands
> take less time to submit than they do to execute, especially if PCI is
> the bus.  With 3D, we'll get lots of tiny triangles that are also
> faster than the bus.  Packing is vital for throughput.

Your experience should be better. From the outside it is hard to tell
how long the GPU takes to execute an instruction.  That suggests a
feature, an on-board timer that tracks how long the command stream
runs and reflects pipelining. Then you could run various combinations
of op codes and see which one is the fastest. Other overhead getting
in the way makes this hard to measure.

-- 
Jon Smirl
jonsmirl at gmail.com