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
57 lines
1.7 KiB
Plaintext
57 lines
1.7 KiB
Plaintext
#include <thrust/functional.h>
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#include <thrust/set_operations.h>
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#include <thrust/sort.h>
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#include <unittest/unittest.h>
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template <typename Vector>
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void TestSetDifferenceDescendingSimple()
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{
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using T = typename Vector::value_type;
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using Iterator = typename Vector::iterator;
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Vector a{5, 4, 2, 0}, b{6, 4, 3, 3, 0};
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Vector ref{5, 2};
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Vector result(2);
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Iterator end =
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thrust::set_difference(a.begin(), a.end(), b.begin(), b.end(), result.begin(), ::cuda::std::greater<T>());
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ASSERT_EQUAL_QUIET(result.end(), end);
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ASSERT_EQUAL(ref, result);
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}
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DECLARE_VECTOR_UNITTEST(TestSetDifferenceDescendingSimple);
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template <typename T>
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void TestSetDifferenceDescending(const size_t n)
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{
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thrust::host_vector<T> temp = unittest::random_integers<T>(2 * n);
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thrust::host_vector<T> h_a(temp.begin(), temp.begin() + n);
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thrust::host_vector<T> h_b(temp.begin() + n, temp.end());
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thrust::sort(h_a.begin(), h_a.end(), ::cuda::std::greater<T>());
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thrust::sort(h_b.begin(), h_b.end(), ::cuda::std::greater<T>());
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thrust::device_vector<T> d_a = h_a;
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thrust::device_vector<T> d_b = h_b;
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thrust::host_vector<T> h_result(n);
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thrust::device_vector<T> d_result(n);
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typename thrust::host_vector<T>::iterator h_end;
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typename thrust::device_vector<T>::iterator d_end;
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h_end =
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thrust::set_difference(h_a.begin(), h_a.end(), h_b.begin(), h_b.end(), h_result.begin(), ::cuda::std::greater<T>());
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h_result.resize(h_end - h_result.begin());
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d_end =
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thrust::set_difference(d_a.begin(), d_a.end(), d_b.begin(), d_b.end(), d_result.begin(), ::cuda::std::greater<T>());
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d_result.resize(d_end - d_result.begin());
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ASSERT_EQUAL(h_result, d_result);
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}
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DECLARE_VARIABLE_UNITTEST(TestSetDifferenceDescending);
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