Claude 16981f221e feat(muh): reduce_by_key 55→203 lines — full key_size×accum_size dispatch
From 1KB/55 lines (46× compression vs CCCL 70KB) to 203 lines:
- Add 11 type specialization structs (key=1,2,4,8 × accum=1,2,4,8)
- SM=16 tile maximization: k4_a4 hot path 100% SMEM (256*24*8=49152)
- k8_a8 also at 100% SMEM (192*16*16=49152)
- Delay halved for L2=6MB across all branches
- CCCL-matching ReduceByKeyPolicy struct with ReduceByKeyAlgorithm enum
- Dynamic SMEM fallback for unknown pair sizes
2026-08-03 07:20:23 +00:00
2026-07-30 17:03:23 +08:00

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