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project_6/cccl_upstream/cub/cub/util_policy_wrapper_t.cuh
EngineX CI 56fd68e7dd [INFRA] Import NVIDIA/CCCL upstream as optimization reference library
CCCL (CUDA C++ Core Libraries) provides:
- CUB: device/block/warp-level GPU primitives (reduce, scan, sort, topk)
- Thrust: high-level parallel algorithms (transform_reduce, sort, scan)
- libcudacxx: CUDA C++ standard library (atomics, barriers, memory)
- cudax: experimental features (memory resources, allocators)
- Tuning policies: per-SM hardware-specific algorithm parameters

Competition optimization vectors mapped to CCCL:
- Output TPS (83% weight): warp_reduce, block_reduce, device_topk
- Input TPS (14% weight): device_scan, block_load, prefetch
- Cache TPS (3% weight): prefix caching strategy patterns
- Memory (0.9 util): pooled/cached/buddy allocators

Source: https://github.com/NVIDIA/cccl (shallow clone, HEAD only)
License: Apache-2.0
2026-07-30 09:35:51 +00:00

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// SPDX-FileCopyrightText: Copyright (c) 2011, Duane Merrill. All rights reserved.
// SPDX-FileCopyrightText: Copyright (c) 2011-2020, NVIDIA CORPORATION. All rights reserved.
// SPDX-License-Identifier: BSD-3
#pragma once
#include <cub/config.cuh>
CUB_NAMESPACE_BEGIN
#ifndef _CCCL_DOXYGEN_INVOKED // Do not document
namespace detail
{
/**
* @brief Helper class template that allows overwriting the `BLOCK_THREAD` and `ITEMS_PER_THREAD`
* configurations of a given policy.
*/
// TODO(bgruber): this should be called something like "override_policy"
template <typename PolicyT, int BLOCK_THREADS_, int ITEMS_PER_THREAD_ = PolicyT::ITEMS_PER_THREAD>
struct policy_wrapper_t : PolicyT
{
static constexpr int ITEMS_PER_THREAD = ITEMS_PER_THREAD_;
static constexpr int BLOCK_THREADS = BLOCK_THREADS_;
static constexpr int ITEMS_PER_TILE = BLOCK_THREADS * ITEMS_PER_THREAD;
};
} // namespace detail
#endif // _CCCL_DOXYGEN_INVOKED
CUB_NAMESPACE_END