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
118 lines
3.0 KiB
Plaintext
118 lines
3.0 KiB
Plaintext
#include <thrust/functional.h>
|
|
#include <thrust/iterator/retag.h>
|
|
#include <thrust/partition.h>
|
|
|
|
#include <unittest/unittest.h>
|
|
|
|
template <typename T>
|
|
struct is_even
|
|
{
|
|
_CCCL_HOST_DEVICE bool operator()(T x) const
|
|
{
|
|
return ((int) x % 2) == 0;
|
|
}
|
|
};
|
|
|
|
template <typename Vector>
|
|
void TestPartitionPointSimple()
|
|
{
|
|
using Iterator = typename Vector::iterator;
|
|
|
|
Vector v{1, 1, 1, 0};
|
|
|
|
Iterator first = v.begin();
|
|
|
|
Iterator last = v.begin() + 4;
|
|
Iterator ref = first + 3;
|
|
ASSERT_EQUAL_QUIET(ref, thrust::partition_point(first, last, ::cuda::std::identity{}));
|
|
|
|
last = v.begin() + 3;
|
|
ref = last;
|
|
ASSERT_EQUAL_QUIET(ref, thrust::partition_point(first, last, ::cuda::std::identity{}));
|
|
}
|
|
DECLARE_VECTOR_UNITTEST(TestPartitionPointSimple);
|
|
|
|
template <class Vector>
|
|
void TestPartitionPoint()
|
|
{
|
|
using T = typename Vector::value_type;
|
|
using Iterator = typename Vector::iterator;
|
|
|
|
const size_t n = (1 << 16) + 13;
|
|
|
|
Vector v = unittest::random_integers<T>(n);
|
|
|
|
Iterator ref = thrust::stable_partition(v.begin(), v.end(), is_even<T>());
|
|
|
|
ASSERT_EQUAL(ref - v.begin(), thrust::partition_point(v.begin(), v.end(), is_even<T>()) - v.begin());
|
|
}
|
|
DECLARE_INTEGRAL_VECTOR_UNITTEST(TestPartitionPoint);
|
|
|
|
template <typename ForwardIterator, typename Predicate>
|
|
ForwardIterator partition_point(my_system& system, ForwardIterator first, ForwardIterator, Predicate)
|
|
{
|
|
system.validate_dispatch();
|
|
return first;
|
|
}
|
|
|
|
void TestPartitionPointDispatchExplicit()
|
|
{
|
|
thrust::device_vector<int> vec(1);
|
|
|
|
my_system sys(0);
|
|
thrust::partition_point(sys, vec.begin(), vec.begin(), 0);
|
|
|
|
ASSERT_EQUAL(true, sys.is_valid());
|
|
}
|
|
DECLARE_UNITTEST(TestPartitionPointDispatchExplicit);
|
|
|
|
template <typename ForwardIterator, typename Predicate>
|
|
ForwardIterator partition_point(my_tag, ForwardIterator first, ForwardIterator, Predicate)
|
|
{
|
|
*first = 13;
|
|
return first;
|
|
}
|
|
|
|
void TestPartitionPointDispatchImplicit()
|
|
{
|
|
thrust::device_vector<int> vec(1);
|
|
|
|
thrust::partition_point(thrust::retag<my_tag>(vec.begin()), thrust::retag<my_tag>(vec.begin()), 0);
|
|
|
|
ASSERT_EQUAL(13, vec.front());
|
|
}
|
|
DECLARE_UNITTEST(TestPartitionPointDispatchImplicit);
|
|
|
|
struct test_less_than
|
|
{
|
|
long long expected;
|
|
|
|
_CCCL_DEVICE bool operator()(long long y)
|
|
{
|
|
return y < expected;
|
|
}
|
|
};
|
|
|
|
void TestPartitionPointWithBigIndexesHelper(int magnitude)
|
|
{
|
|
thrust::counting_iterator<long long> begin(0);
|
|
thrust::counting_iterator<long long> end = begin + (1ll << magnitude);
|
|
ASSERT_EQUAL(::cuda::std::distance(begin, end), 1ll << magnitude);
|
|
|
|
test_less_than fn = {(1ll << magnitude) - 17};
|
|
|
|
ASSERT_EQUAL(::cuda::std::distance(begin, thrust::partition_point(thrust::device, begin, end, fn)),
|
|
(1ll << magnitude) - 17);
|
|
}
|
|
|
|
#ifndef THRUST_FORCE_32_BIT_OFFSET_TYPE
|
|
void TestPartitionPointWithBigIndexes()
|
|
{
|
|
TestPartitionPointWithBigIndexesHelper(30);
|
|
TestPartitionPointWithBigIndexesHelper(31);
|
|
TestPartitionPointWithBigIndexesHelper(32);
|
|
TestPartitionPointWithBigIndexesHelper(33);
|
|
}
|
|
DECLARE_UNITTEST(TestPartitionPointWithBigIndexes);
|
|
#endif // THRUST_FORCE_32_BIT_OFFSET_TYPE
|