The exciting part of HSA though is the APU architecture that AMD is putting out. Its hardware specific, but the CPU and embedded GPU have a coherent cache. (CPU and GPU are on the same die with APUs).
Agreed, that's the most thrilling development to HSA in my eyes. Coherent memory structures (with much of it shared) all the way down truly elevates the GPU to first-class citizenship.
What I don't really see, HSA-wise, is how they plan to cater for the fact that graphics and compute cores favour significantly different types of memory (DDR vs GDDR). From what I understand, one of the major cripplers of on-die graphics so far as been its reliance on the same bog-standard memory interface shared with the CPU. How will this interact with AMD's side-port memory schemes?
