Published on: 2025-05-11 23:51:49
Modern GPUs often make a difficult tradeoff between occupancy (active thread count) and register count available to each thread. Higher occupancy provides more thread level parallelism to hide latency with, just as more SMT threads help hide latency on a CPU. But while a CPU can use all of its SMT threads regardless of what code it's running, the same doesn't apply to GPUs. GPU ISAs offer a large number of very wide vector registers. Storing all registers for all thread slots would be impractica
Keywords: allocation dynamic register thread vgpr
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