Re:Prefix sum: 20 GB/s (2.6x baseline)
by yogishbaliga on Tuesday October 14, 2025 @06:23PM
(#45585756)
If it is unified memory, CPU can access the result of GPU processing without copying it to CPU memory (theoretically)
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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.