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
87 lines
2.6 KiB
Plaintext
87 lines
2.6 KiB
Plaintext
#include <thrust/execution_policy.h>
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#include <thrust/set_operations.h>
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#include <cuda/buffer>
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#include <cuda/cccl_runtime_test_helper.cuh>
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#include <cuda/launch>
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#include <cuda/stream>
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#include <unittest/unittest.h>
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#ifdef THRUST_TEST_DEVICE_SIDE
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struct set_intersection_kernel
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{
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template <typename ExecutionPolicy, typename Input1, typename Input2, typename Output>
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__device__ void operator()(ExecutionPolicy exec, Input1 a, Input2 b, Output result) const
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{
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const auto end = thrust::set_intersection(exec, a.begin(), a.end(), b.begin(), b.end(), result.begin());
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TEST_ASSERT_DEVICE(end == result.end());
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}
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};
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template <typename ExecutionPolicy>
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void TestSetIntersectionDevice(ExecutionPolicy exec)
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{
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const auto device = test_runtime::current_test_device();
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cuda::stream stream{device};
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auto a = cuda::make_device_buffer<int>(stream, device, {0, 2, 4});
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auto b = cuda::make_device_buffer<int>(stream, device, {0, 3, 3, 4});
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auto result = cuda::make_device_buffer<int>(stream, device, 2, cuda::no_init);
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cuda::launch(stream, test_runtime::single_thread_config(), set_intersection_kernel{}, exec, a, b, result);
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stream.sync();
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test_runtime::assert_equal(stream, result, {0, 4});
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}
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void TestSetIntersectionDeviceSeq()
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{
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TestSetIntersectionDevice(thrust::seq);
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}
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DECLARE_UNITTEST(TestSetIntersectionDeviceSeq);
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void TestSetIntersectionDeviceDevice()
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{
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TestSetIntersectionDevice(thrust::device);
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}
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DECLARE_UNITTEST(TestSetIntersectionDeviceDevice);
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void TestSetIntersectionDeviceNoSync()
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{
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TestSetIntersectionDevice(thrust::cuda::par_nosync);
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}
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DECLARE_UNITTEST(TestSetIntersectionDeviceNoSync);
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#endif
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template <typename ExecutionPolicy>
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void TestSetIntersectionCudaStreams(ExecutionPolicy policy)
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{
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const auto device = test_runtime::current_test_device();
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cuda::stream stream{device};
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auto a = cuda::make_device_buffer<int>(stream, device, {0, 2, 4});
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auto b = cuda::make_device_buffer<int>(stream, device, {0, 3, 3, 4});
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auto result = cuda::make_device_buffer<int>(stream, device, 2, cuda::no_init);
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const auto streampolicy = policy.on(stream.get());
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const auto end = thrust::set_intersection(streampolicy, a.begin(), a.end(), b.begin(), b.end(), result.begin());
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stream.sync();
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ASSERT_EQUAL_QUIET(result.end(), end);
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test_runtime::assert_equal(stream, result, {0, 4});
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}
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void TestSetIntersectionCudaStreamsSync()
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{
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TestSetIntersectionCudaStreams(thrust::cuda::par);
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}
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DECLARE_UNITTEST(TestSetIntersectionCudaStreamsSync);
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void TestSetIntersectionCudaStreamsNoSync()
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{
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TestSetIntersectionCudaStreams(thrust::cuda::par_nosync);
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}
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DECLARE_UNITTEST(TestSetIntersectionCudaStreamsNoSync);
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