It would be nice to have hybrid state also.
My bad, it seemed evidently clear to me that he worked at DICE, which was one of the main reasons why I wanted to try BF3 in the first place. I am still wondering why I was generally clueless as to where he works. I will try to fix my previous post.
Oh, okay. That doesn't sound like something I'd say. What's the difference between a software cache and a scratchpad? Does it have any implication in the framebuffer size?
He's not one of the devs on BF4, he's technical director for Frostbite engine.
Cache is part of the memory hierarchy and keeps an easy to access the *copy* of the data that's stored somewhere in another (slower) memory. Scratchpad is directly addressable* and can/will contain the only copy of some data. E.g. for deferred renderer you build your g-buffer and then use it as a source for next render to build the final composite. There's no point in pushing g-buffer to RAM if you can keep it temporarily in a large enough and pretty fast piece of memory. This is what you'd use your scratchpad for.
It's on none of the slides, though. :S IDK, but perhaps SRAM can be mapped to the CPU VA space? This would probably use up GPU DRAM BW though so it wouldn't be very useful and severely BW limited compared to the SRAM<->GPU throughput.
ORLY?
Read the entire sentence, please. "Jaguar in the Xbox One" is not Jaguar in your PC (and on top of that calling GPU in Xbox One "Jaguar" is probably a bad idea to begin with). Non-CPU-cache-coherent GPU bandwidth on X1 is 68GBps.
Oh, cool, thanks!
Its placement is super weird. :S
