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Add sm90 and sm1200 policies for segmented_sort #6174

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Add sm90 and sm1200 policies for segmented_sort #6174

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65 changes: 64 additions & 1 deletion cub/cub/device/dispatch/tuning/tuning_segmented_sort.cuh
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Original file line number Diff line number Diff line change
Expand Up @@ -391,7 +391,70 @@ struct policy_hub
LOAD_LDG>;
};

using MaxPolicy = Policy860;
struct Policy900 : ChainedPolicy<900, Policy900, Policy860>
{
static constexpr int BLOCK_THREADS = 256;
static constexpr int PARTITIONING_THRESHOLD = 500;
using LargeSegmentPolicy = AgentRadixSortDownsweepPolicy<
BLOCK_THREADS,
23,
DominantT,
BLOCK_LOAD_TRANSPOSE,
LOAD_DEFAULT,
RADIX_RANK_MEMOIZE,
BLOCK_SCAN_WARP_SCANS,
(sizeof(KeyT) > 1) ? 6 : 4>;

static constexpr int ITEMS_PER_SMALL_THREAD = Nominal4BItemsToItems<DominantT>(9);
static constexpr int ITEMS_PER_MEDIUM_THREAD = Nominal4BItemsToItems<DominantT>(KEYS_ONLY ? 7 : 11);

using SmallSegmentPolicy =
AgentSubWarpMergeSortPolicy<BLOCK_THREADS,
KEYS_ONLY ? 4 : 2 /* Threads per segment */,
ITEMS_PER_SMALL_THREAD,
WARP_LOAD_TRANSPOSE,
LOAD_DEFAULT>;
using MediumSegmentPolicy =
AgentSubWarpMergeSortPolicy<BLOCK_THREADS,
32 /* Threads per segment */,
ITEMS_PER_MEDIUM_THREAD,
WARP_LOAD_TRANSPOSE,
LOAD_DEFAULT>;
};

struct Policy1200 : ChainedPolicy<1200, Policy1200, Policy900>
{
static constexpr int BLOCK_THREADS = 256;
static constexpr int PARTITIONING_THRESHOLD = 500;
using LargeSegmentPolicy = AgentRadixSortDownsweepPolicy<
BLOCK_THREADS,
23,
DominantT,
BLOCK_LOAD_TRANSPOSE,
LOAD_DEFAULT,
RADIX_RANK_MEMOIZE,
BLOCK_SCAN_WARP_SCANS,
(sizeof(KeyT) > 1) ? 6 : 4>;

static constexpr bool LARGE_ITEMS = sizeof(DominantT) > 4;
static constexpr int ITEMS_PER_SMALL_THREAD = Nominal4BItemsToItems<DominantT>(LARGE_ITEMS ? 7 : 9);
static constexpr int ITEMS_PER_MEDIUM_THREAD = Nominal4BItemsToItems<DominantT>(LARGE_ITEMS ? 9 : 7);

using SmallSegmentPolicy =
AgentSubWarpMergeSortPolicy<BLOCK_THREADS,
LARGE_ITEMS ? 8 : 2 /* Threads per segment */,
ITEMS_PER_SMALL_THREAD,
WARP_LOAD_TRANSPOSE,
LOAD_LDG>;
using MediumSegmentPolicy =
AgentSubWarpMergeSortPolicy<BLOCK_THREADS,
16 /* Threads per segment */,
ITEMS_PER_MEDIUM_THREAD,
WARP_LOAD_TRANSPOSE,
LOAD_LDG>;
};

using MaxPolicy = Policy1200;
};
} // namespace detail::segmented_sort

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