I have a question about the memory model on AMD Fusion devices:
As far as I understand on Llano the CPU and GPU work on separate areas of the same physical memory. So a copy is still needed if the CPU works a buffer first and then the GPU works on the same buffer. Is that right?
Has this situation changed with AMD Trinity? On Intel's Ivy Bridge platform it seems that copying data is not necessary any more. Afaik you can simply create a buffer in the CPU-GPU context which can then be accessed by both the CPU and the GPU device without being copied. Is this similar on Trinity?