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
73 lines
2.0 KiB
Plaintext
73 lines
2.0 KiB
Plaintext
#include <thrust/adjacent_difference.h>
|
|
#include <thrust/device_free.h>
|
|
#include <thrust/device_malloc.h>
|
|
#include <thrust/execution_policy.h>
|
|
|
|
#include <unittest/unittest.h>
|
|
|
|
struct detect_wrong_difference
|
|
{
|
|
using difference_type = void;
|
|
using value_type = long long;
|
|
using pointer = void;
|
|
using reference = detect_wrong_difference;
|
|
using iterator_category = ::cuda::std::output_iterator_tag;
|
|
|
|
bool* flag;
|
|
|
|
_CCCL_HOST_DEVICE detect_wrong_difference operator++() const
|
|
{
|
|
return *this;
|
|
}
|
|
_CCCL_HOST_DEVICE detect_wrong_difference operator*() const
|
|
{
|
|
return *this;
|
|
}
|
|
template <typename Difference>
|
|
_CCCL_HOST_DEVICE detect_wrong_difference operator+(Difference) const
|
|
{
|
|
return *this;
|
|
}
|
|
template <typename Index>
|
|
_CCCL_HOST_DEVICE detect_wrong_difference operator[](Index) const
|
|
{
|
|
return *this;
|
|
}
|
|
|
|
_CCCL_DEVICE void operator=(long long difference) const
|
|
{
|
|
if (difference != 1)
|
|
{
|
|
*flag = false;
|
|
}
|
|
}
|
|
};
|
|
|
|
void TestAdjacentDifferenceWithBigIndexesHelper(int magnitude)
|
|
{
|
|
thrust::counting_iterator<long long> begin(1);
|
|
thrust::counting_iterator<long long> end = begin + (1ll << magnitude);
|
|
ASSERT_EQUAL(::cuda::std::distance(begin, end), 1ll << magnitude);
|
|
|
|
thrust::device_ptr<bool> all_differences_correct = thrust::device_malloc<bool>(1);
|
|
*all_differences_correct = true;
|
|
|
|
detect_wrong_difference out = {thrust::raw_pointer_cast(all_differences_correct)};
|
|
|
|
thrust::adjacent_difference(thrust::device, begin, end, out);
|
|
|
|
bool all_differences_correct_h = *all_differences_correct;
|
|
thrust::device_free(all_differences_correct);
|
|
|
|
ASSERT_EQUAL(all_differences_correct_h, true);
|
|
}
|
|
|
|
void TestAdjacentDifferenceWithBigIndexes()
|
|
{
|
|
TestAdjacentDifferenceWithBigIndexesHelper(30);
|
|
TestAdjacentDifferenceWithBigIndexesHelper(31);
|
|
TestAdjacentDifferenceWithBigIndexesHelper(32);
|
|
TestAdjacentDifferenceWithBigIndexesHelper(33);
|
|
}
|
|
DECLARE_UNITTEST(TestAdjacentDifferenceWithBigIndexes);
|