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by hughw 244 days ago
The shared memory architecture doesn't eliminate copying the data across to the device. Edit: or back.
1 comments

If it is unified memory, CPU can access the result of GPU processing without copying it to CPU memory (theoretically)
If the CPU touches an address mapped to the GPU doesn't it fault a page into the CPU address space? I mean the program doesn't do anything special, but a page gets faulted in I believe.