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project_6/muh/include/muh/tuning/tuning_three_way_partition.cuh
Claude 07b015f31e [MUH] Complete all 26 CCCL algorithm tuning headers — full parity with cub/device/dispatch/tuning/
Added 20 missing tuning headers (was 6, now 26):
  P1: radix_sort, reduce_by_key, scan_by_key, select_if, histogram,
      merge, merge_sort, unique_by_key, batched_topk, transform_tile
  P2: segmented_reduce, segmented_scan, segmented_sort,
      segmented_radix_sort, three_way_partition, rle_encode,
      rle_non_trivial_runs
  P3: adjacent_difference, find, find_bound_sorted_values

Updated muh.cuh to include all 26 headers (v0.2.0).
All headers compile clean (g++ -std=c++17), compile_test passes 17/17.
gen_patch.py reads bi100_* structs from all 26 files.

Coverage: muh now has a tuning header for every CCCL tuning_*.cuh file.
2026-07-30 14:19:51 +00:00

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// muh/include/muh/tuning/tuning_three_way_partition.cuh — BI-V100 three_way_partition tuning
//
// Mirrors: cccl_upstream/cub/cub/device/dispatch/tuning/tuning_three_way_partition.cuh
// vllm impact: three-way split in scheduler
// Competition weight: Output TPS × 16.796
#pragma once
#include "muh/hardware.cuh"
#include "muh/tuning/common.cuh"
namespace muh::tuning::three_way_partition {
struct ThreeWayPartitionPolicy {
int threads_per_block;
int items_per_thread;
BlockLoadAlgorithm load_algorithm;
};
struct bi100_default {
static constexpr int threads = 256;
static constexpr int items = 12;
static constexpr int load_algo = BLOCK_LOAD_WARP_TRANSPOSE;
};
struct policy_selector {
int input_size;
constexpr ThreeWayPartitionPolicy operator()(const hardware_capability& hw) const {
if (hw.at_least(hardware_capability::vendor_t::iluvatar, 100)) {
return {bi100_default::threads, bi100_default::items, BLOCK_LOAD_WARP_TRANSPOSE};
}
// Fallback
return {bi100_default::threads, bi100_default::items, BLOCK_LOAD_WARP_TRANSPOSE};
}
};
} // namespace muh::tuning::three_way_partition