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
129 lines
3.4 KiB
Plaintext
129 lines
3.4 KiB
Plaintext
#include <thrust/count.h>
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#include <thrust/iterator/retag.h>
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#include <unittest/unittest.h>
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template <class Vector>
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void TestCountSimple()
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{
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Vector data{1, 1, 0, 0, 1};
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ASSERT_EQUAL(thrust::count(data.begin(), data.end(), 0), 2);
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ASSERT_EQUAL(thrust::count(data.begin(), data.end(), 1), 3);
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ASSERT_EQUAL(thrust::count(data.begin(), data.end(), 2), 0);
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}
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DECLARE_VECTOR_UNITTEST(TestCountSimple);
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template <typename T>
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void TestCount(const size_t n)
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{
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thrust::host_vector<T> h_data = unittest::random_samples<T>(n);
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thrust::device_vector<T> d_data = h_data;
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size_t cpu_result = thrust::count(h_data.begin(), h_data.end(), T(5));
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size_t gpu_result = thrust::count(d_data.begin(), d_data.end(), T(5));
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ASSERT_EQUAL(cpu_result, gpu_result);
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}
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DECLARE_VARIABLE_UNITTEST(TestCount);
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template <typename T>
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struct greater_than_five
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{
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_CCCL_HOST_DEVICE bool operator()(const T& x) const
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{
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return x > 5;
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}
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};
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template <class Vector>
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void TestCountIfSimple()
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{
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using T = typename Vector::value_type;
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Vector data{1, 6, 1, 9, 2};
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ASSERT_EQUAL(thrust::count_if(data.begin(), data.end(), greater_than_five<T>()), 2);
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}
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DECLARE_VECTOR_UNITTEST(TestCountIfSimple);
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template <typename T>
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void TestCountIf(const size_t n)
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{
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thrust::host_vector<T> h_data = unittest::random_samples<T>(n);
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thrust::device_vector<T> d_data = h_data;
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size_t cpu_result = thrust::count_if(h_data.begin(), h_data.end(), greater_than_five<T>());
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size_t gpu_result = thrust::count_if(d_data.begin(), d_data.end(), greater_than_five<T>());
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ASSERT_EQUAL(cpu_result, gpu_result);
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}
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DECLARE_VARIABLE_UNITTEST(TestCountIf);
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template <typename Vector>
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void TestCountFromConstIteratorSimple()
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{
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Vector data{1, 1, 0, 0, 1};
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ASSERT_EQUAL(thrust::count(data.cbegin(), data.cend(), 0), 2);
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ASSERT_EQUAL(thrust::count(data.cbegin(), data.cend(), 1), 3);
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ASSERT_EQUAL(thrust::count(data.cbegin(), data.cend(), 2), 0);
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}
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DECLARE_VECTOR_UNITTEST(TestCountFromConstIteratorSimple);
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template <typename InputIterator, typename EqualityComparable>
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int count(my_system& system, InputIterator, InputIterator, EqualityComparable x)
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{
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system.validate_dispatch();
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return x;
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}
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void TestCountDispatchExplicit()
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{
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thrust::device_vector<int> vec(1);
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my_system sys(0);
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thrust::count(sys, vec.begin(), vec.end(), 13);
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ASSERT_EQUAL(true, sys.is_valid());
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}
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DECLARE_UNITTEST(TestCountDispatchExplicit);
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template <typename InputIterator, typename EqualityComparable>
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int count(my_tag, InputIterator /*first*/, InputIterator, EqualityComparable x)
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{
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return x;
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}
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void TestCountDispatchImplicit()
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{
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thrust::device_vector<int> vec(1);
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auto result = thrust::count(thrust::retag<my_tag>(vec.begin()), thrust::retag<my_tag>(vec.end()), 13);
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ASSERT_EQUAL(13, result);
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}
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DECLARE_UNITTEST(TestCountDispatchImplicit);
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void TestCountWithBigIndexesHelper(int magnitude)
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{
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thrust::counting_iterator<long long> begin(1);
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thrust::counting_iterator<long long> end = begin + (1ll << magnitude);
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ASSERT_EQUAL(::cuda::std::distance(begin, end), 1ll << magnitude);
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long long result = thrust::count(thrust::device, begin, end, (1ll << magnitude) - 17);
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ASSERT_EQUAL(result, 1);
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}
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void TestCountWithBigIndexes()
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{
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TestCountWithBigIndexesHelper(30);
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#ifndef THRUST_FORCE_32_BIT_OFFSET_TYPE
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TestCountWithBigIndexesHelper(31);
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TestCountWithBigIndexesHelper(32);
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TestCountWithBigIndexesHelper(33);
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#endif
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}
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DECLARE_UNITTEST(TestCountWithBigIndexes);
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