Again, you can stream a whole frame buffer reasonably fast - that should
be nearly full-rate; it should be full rate if you pre-fetch with
sufficient advance notice (500-1000 clocks), or DMA. But random access
reads *have* to be slow: you get a stall while the system goes to PCIe
for each cache line you attempt to read from.
Paul
ron minnich wrote:
On Fri, Dec 5, 2008 at 10:32 AM, Russ Cox <[EMAIL PROTECTED]> wrote:
To a first approximation, no one reads directly from video memory.
That is certainly true, but it's been a concern for some time for GPU
computing, and the chipset folks are paying attention.
ron
