56fd68e7dd
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
42 lines
1.5 KiB
Plaintext
42 lines
1.5 KiB
Plaintext
// SPDX-FileCopyrightText: Copyright (c) 2026, NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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#include <thrust/device_vector.h>
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#include <thrust/fill.h>
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#include <thrust/logical.h>
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#include <cuda/functional>
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#include <cuda/memory_pool>
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#include <cuda/stream>
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#include "nvbench_helper.cuh"
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template <typename T>
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static void basic(nvbench::state& state, nvbench::type_list<T>)
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{
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T val = 1;
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// set up input
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const auto elements = static_cast<std::size_t>(state.get_int64("Elements"));
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const auto common_prefix = state.get_float64("MismatchAt");
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const auto mismatch_point = static_cast<std::size_t>(static_cast<double>(elements) * common_prefix);
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thrust::device_vector<T> dinput(elements, thrust::no_init);
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thrust::fill(dinput.begin(), dinput.begin() + mismatch_point, T{0});
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thrust::fill(dinput.begin() + mismatch_point, dinput.end(), val);
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state.add_global_memory_reads<T>(mismatch_point + 1);
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state.add_global_memory_writes<size_t>(1);
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caching_allocator_t alloc{};
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state.exec(
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nvbench::exec_tag::gpu | nvbench::exec_tag::no_batch | nvbench::exec_tag::sync, [&](nvbench::launch& launch) {
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do_not_optimize(thrust::none_of(policy(alloc, launch), dinput.begin(), dinput.end(), cuda::equal_to_value{val}));
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});
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}
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NVBENCH_BENCH_TYPES(basic, NVBENCH_TYPE_AXES(fundamental_types))
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.set_name("base")
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.add_int64_power_of_two_axis("Elements", nvbench::range(16, 28, 4))
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.add_float64_axis("MismatchAt", std::vector{1.0, 0.5, 0.01});
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