2 docs tagged with "reduction"

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Summing an array, finding its maximum, counting matches — these collapse many values into one, and doing it efficiently on a GPU means combining values in parallel at every level of the hierarchy rather than serializing down to one thread. Warp-Level Primitives already built the innermost piece, warpReduceSum; this page builds outward from it — warp to block to grid — and then covers the related but distinct problem of a scan, where every intermediate result is wanted, not just the final one.