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
131 lines
3.4 KiB
Plaintext
131 lines
3.4 KiB
Plaintext
#include <thrust/execution_policy.h>
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#include <thrust/mismatch.h>
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#include <cuda/std/atomic>
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#include <unittest/unittest.h>
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#ifdef THRUST_TEST_DEVICE_SIDE
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template <typename ExecutionPolicy, typename Iterator1, typename Iterator2, typename Iterator3>
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__global__ void
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mismatch_kernel(ExecutionPolicy exec, Iterator1 first1, Iterator1 last1, Iterator2 first2, Iterator3 result)
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{
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*result = thrust::mismatch(exec, first1, last1, first2);
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}
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template <typename ExecutionPolicy>
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void TestMismatchDevice(ExecutionPolicy exec)
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{
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thrust::device_vector<int> a = {1, 2, 3, 4};
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thrust::device_vector<int> b = {1, 2, 4, 3};
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using pair_type =
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cuda::std::pair<typename thrust::device_vector<int>::iterator, typename thrust::device_vector<int>::iterator>;
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thrust::device_vector<pair_type> d_result(1);
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mismatch_kernel<<<1, 1>>>(exec, a.begin(), a.end(), b.begin(), d_result.begin());
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{
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cudaError_t const err = cudaDeviceSynchronize();
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ASSERT_EQUAL(cudaSuccess, err);
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}
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ASSERT_EQUAL(2, ((pair_type) d_result[0]).first - a.begin());
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ASSERT_EQUAL(2, ((pair_type) d_result[0]).second - b.begin());
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b[2] = 3;
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mismatch_kernel<<<1, 1>>>(exec, a.begin(), a.end(), b.begin(), d_result.begin());
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{
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cudaError_t const err = cudaDeviceSynchronize();
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ASSERT_EQUAL(cudaSuccess, err);
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}
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ASSERT_EQUAL(3, ((pair_type) d_result[0]).first - a.begin());
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ASSERT_EQUAL(3, ((pair_type) d_result[0]).second - b.begin());
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b[3] = 4;
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mismatch_kernel<<<1, 1>>>(exec, a.begin(), a.end(), b.begin(), d_result.begin());
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{
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cudaError_t const err = cudaDeviceSynchronize();
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ASSERT_EQUAL(cudaSuccess, err);
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}
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ASSERT_EQUAL(4, ((pair_type) d_result[0]).first - a.begin());
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ASSERT_EQUAL(4, ((pair_type) d_result[0]).second - b.begin());
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}
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void TestMismatchDeviceSeq()
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{
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TestMismatchDevice(thrust::seq);
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}
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DECLARE_UNITTEST(TestMismatchDeviceSeq);
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void TestMismatchDeviceDevice()
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{
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TestMismatchDevice(thrust::device);
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}
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DECLARE_UNITTEST(TestMismatchDeviceDevice);
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#endif
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void TestMismatchCudaStreams()
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{
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using Vector = thrust::device_vector<int>;
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Vector a = {1, 2, 3, 4};
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Vector b = {1, 2, 4, 3};
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cudaStream_t s;
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cudaStreamCreate(&s);
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ASSERT_EQUAL(thrust::mismatch(thrust::cuda::par.on(s), a.begin(), a.end(), b.begin()).first - a.begin(), 2);
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ASSERT_EQUAL(thrust::mismatch(thrust::cuda::par.on(s), a.begin(), a.end(), b.begin()).second - b.begin(), 2);
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b[2] = 3;
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ASSERT_EQUAL(thrust::mismatch(thrust::cuda::par.on(s), a.begin(), a.end(), b.begin()).first - a.begin(), 3);
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ASSERT_EQUAL(thrust::mismatch(thrust::cuda::par.on(s), a.begin(), a.end(), b.begin()).second - b.begin(), 3);
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b[3] = 4;
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ASSERT_EQUAL(thrust::mismatch(thrust::cuda::par.on(s), a.begin(), a.end(), b.begin()).first - a.begin(), 4);
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ASSERT_EQUAL(thrust::mismatch(thrust::cuda::par.on(s), a.begin(), a.end(), b.begin()).second - b.begin(), 4);
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cudaStreamDestroy(s);
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}
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DECLARE_UNITTEST(TestMismatchCudaStreams);
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// see https://github.com/NVIDIA/cccl/issues/3591
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template <typename T>
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class Wrapper
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{
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public:
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Wrapper()
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{
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++my_count;
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}
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_CCCL_HOST_DEVICE bool operator==(const Wrapper&) const
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{
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return true;
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}
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~Wrapper()
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{
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--my_count;
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}
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private:
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static cuda::std::atomic<size_t> my_count;
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T dummy;
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};
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void TestMismatchBug3591()
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{
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using T = Wrapper<int32_t>;
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T* p = nullptr;
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thrust::mismatch(thrust::device, p, p, p, cuda::std::equal_to<T>());
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}
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DECLARE_UNITTEST(TestMismatchBug3591);
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