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[CCCL] 瘦身 + 补全: 移除 cudax/python/libcudacxx-tests 冗余文件, 新增 c2h 测试助手 + cmake 构建系统 + 8 个 CUDA thrust examples

Browse Source 
变更摘要:
- 删除: cudax/ (783 files, 7.2M) — 实验性组件，竞赛不需要
- 删除: python/ (226 files, 2.0M) — Python 绑定，竞赛不需要
- 删除: libcudacxx/{test,benchmarks,codegen,cmake,share} (4432 files, 31M)
  保留: libcudacxx/include/ (1463 headers, cuda::std 编译依赖)
- 新增: c2h/ (27 files) — CUB Catch2 测试辅助头文件，编译 243 个测试必需
- 新增: cmake/ (29 files) — CCCL 原生 CMake 构建系统
- 新增: thrust/examples/cuda/ (7 files) + cpp_integration/ (1 file)
  async_reduce, custom_temporary_allocation, explicit_cuda_stream,
  global_device_vector, range_view, unwrap_pointer, wrap_pointer, device

结果: cccl_upstream 从 74M→35M (瘦身 53%), 核心内容 100% 保留:
  27/27 tuning headers, 78 benchmarks, 243 tests,
  60 thrust examples, 18 CUB examples, 全部编译头文件
This commit is contained in:
muh-bot
2026-08-03 12:39:26 +00:00
parent a2a5dd8f00
commit 24ef6a91b5
5439 changed files with 0 additions and 719516 deletions
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128
cccl_upstream/cudax/test/algorithm/common.cuh
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//===----------------------------------------------------------------------===//
//
// Part of CUDA Experimental in CUDA C++ Core Libraries,
// under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#ifndef __ALGORITHM_COMMON__
#define __ALGORITHM_COMMON__
#include <cuda/algorithm>
#include <cuda/memory_pool>
#include <cuda/memory_resource>
#include <cuda/std/mdspan>
#include <cuda/experimental/container.cuh>
#include <cuda/experimental/memory_resource.cuh>
#include <testing.cuh>
#include <utility.cuh>
inline constexpr uint8_t fill_byte = 1;
inline constexpr uint32_t buffer_size = 42;
inline int get_expected_value(uint8_t pattern_byte)
{
int result;
memset(&result, pattern_byte, sizeof(int));
return result;
}
template <typename Result>
void check_result_and_erase(cudax::stream_ref stream, Result&& result, uint8_t pattern_byte = fill_byte)
{
int expected = get_expected_value(pattern_byte);
stream.sync();
for (int& i : result)
{
REQUIRE(i == expected);
i = 0;
}
}
template <typename Layout = cuda::std::layout_right, typename Extents>
auto make_buffer_for_mdspan(Extents extents, char value = 0)
{
cuda::mr::legacy_pinned_memory_resource host_resource;
auto mapping = typename Layout::template mapping<decltype(extents)>{extents};
cudax::uninitialized_buffer<int, cuda::mr::host_accessible> buffer(host_resource, mapping.required_span_size());
memset(buffer.data(), value, buffer.size_bytes());
return buffer;
}
inline auto create_fake_strided_mdspan()
{
cuda::std::dextents<size_t, 3> dynamic_extents{1, 2, 3};
cuda::std::array<size_t, 3> strides{12, 4, 1};
#if _CCCL_CUDA_COMPILER(NVCC, <, 12, 6)
auto map = cuda::std::layout_stride::mapping{dynamic_extents, strides};
#else // ^^^ _CCCL_CUDA_COMPILER(NVCC, <, 12, 6) ^^^ / vvv _CCCL_CUDA_COMPILER(NVCC, >=, 12, 6) vvv
cuda::std::layout_stride::mapping map{dynamic_extents, strides};
#endif // ^^^ _CCCL_CUDA_COMPILER(NVCC, >=, 12, 6) ^^^
return cuda::std::mdspan<int, decltype(dynamic_extents), cuda::std::layout_stride>(nullptr, map);
};
namespace cuda::experimental
{
// Need a type that goes through all launch_transform steps, but is not a contiguous_range
template <typename RelocatableValue = cuda::std::span<int>>
struct weird_buffer
{
cuda::mr::legacy_pinned_memory_resource& resource;
int* data;
std::size_t size;
weird_buffer(::cuda::mr::legacy_pinned_memory_resource& res, std::size_t s)
: resource(res)
, data((int*) res.allocate_sync(s * sizeof(int)))
, size(s)
{
memset(data, 0, size);
}
~weird_buffer()
{
resource.deallocate_sync(data, size);
}
weird_buffer(const weird_buffer&) = delete;
weird_buffer(weird_buffer&&) = delete;
struct transform_result
{
int* data;
std::size_t size;
RelocatableValue transformed_argument()
{
return *this;
};
operator cuda::std::span<int>()
{
return {data, size};
}
template <typename Extents>
operator cuda::std::mdspan<int, Extents>()
{
return cuda::std::mdspan<int, Extents>{data};
}
};
[[nodiscard]] friend transform_result transform_launch_argument(cuda::stream_ref, const weird_buffer& self) noexcept
{
return {self.data, self.size};
}
};
} // namespace cuda::experimental
#endif // __ALGORITHM_COMMON__

187
cccl_upstream/cudax/test/algorithm/copy.cu
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//===----------------------------------------------------------------------===//
//
// Part of CUDA Experimental in CUDA C++ Core Libraries,
// under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#include "common.cuh"
C2H_TEST("1d Copy", "[data_manipulation]")
{
cuda::stream _stream{cuda::device_ref{0}};
SECTION("Device resource")
{
cuda::device_memory_pool_ref device_resource = cuda::device_default_memory_pool(cuda::device_ref{0});
std::vector<int> host_vector(buffer_size);
{
cuda::__uninitialized_async_buffer<int, cuda::mr::device_accessible> buffer(device_resource, _stream, buffer_size);
cuda::fill_bytes(_stream, buffer, fill_byte);
cuda::copy_bytes(_stream, buffer, host_vector);
check_result_and_erase(_stream, host_vector);
cuda::copy_bytes(_stream, std::move(buffer), host_vector);
check_result_and_erase(_stream, host_vector);
}
{
cuda::__uninitialized_async_buffer<int, cuda::mr::device_accessible> not_yet_const_buffer(
device_resource, _stream, buffer_size);
cuda::fill_bytes(_stream, not_yet_const_buffer, fill_byte);
const auto& const_buffer = not_yet_const_buffer;
cuda::copy_bytes(_stream, const_buffer, host_vector);
check_result_and_erase(_stream, host_vector);
cuda::copy_bytes(_stream, const_buffer, cuda::std::span(host_vector));
check_result_and_erase(_stream, host_vector);
}
}
SECTION("Host and managed resource")
{
cuda::mr::legacy_managed_memory_resource managed_resource;
cuda::mr::legacy_pinned_memory_resource host_resource;
{
cudax::uninitialized_buffer<int, cuda::mr::host_accessible> host_buffer(host_resource, buffer_size);
cudax::uninitialized_buffer<int, cuda::mr::device_accessible> device_buffer(managed_resource, buffer_size);
cuda::fill_bytes(_stream, host_buffer, fill_byte);
cuda::copy_bytes(_stream, host_buffer, device_buffer);
check_result_and_erase(_stream, device_buffer);
cuda::copy_bytes(_stream, cuda::std::span(host_buffer), device_buffer);
check_result_and_erase(_stream, device_buffer);
}
{
cudax::uninitialized_buffer<int, cuda::mr::host_accessible> not_yet_const_host_buffer(host_resource, buffer_size);
cudax::uninitialized_buffer<int, cuda::mr::device_accessible> device_buffer(managed_resource, buffer_size);
cuda::fill_bytes(_stream, not_yet_const_host_buffer, fill_byte);
const auto& const_host_buffer = not_yet_const_host_buffer;
cuda::copy_bytes(_stream, const_host_buffer, device_buffer);
check_result_and_erase(_stream, device_buffer);
cuda::copy_bytes(_stream, cuda::std::span(const_host_buffer), device_buffer);
check_result_and_erase(_stream, device_buffer);
}
}
SECTION("Launch transform")
{
cuda::mr::legacy_pinned_memory_resource host_resource;
cudax::weird_buffer input(host_resource, buffer_size);
cudax::weird_buffer output(host_resource, buffer_size);
memset(input.data, fill_byte, input.size * sizeof(int));
cuda::copy_bytes(_stream, input, output);
check_result_and_erase(_stream, cuda::std::span(output.data, output.size));
}
SECTION("Asymmetric size")
{
cuda::mr::legacy_pinned_memory_resource host_resource;
cudax::uninitialized_buffer<int, cuda::mr::host_accessible> host_buffer(host_resource, 1);
cuda::fill_bytes(_stream, host_buffer, fill_byte);
::std::vector<int> vec(buffer_size, 0xbeef);
cuda::copy_bytes(_stream, host_buffer, vec);
_stream.sync();
REQUIRE(vec[0] == get_expected_value(fill_byte));
REQUIRE(vec[1] == 0xbeef);
}
}
template <typename SrcLayout = cuda::std::layout_right,
typename DstLayout = SrcLayout,
typename SrcExtents,
typename DstExtents>
void test_mdspan_copy_bytes(
cudax::stream_ref stream, SrcExtents src_extents = SrcExtents(), DstExtents dst_extents = DstExtents())
{
auto src_buffer = make_buffer_for_mdspan<SrcLayout>(src_extents, 1);
auto dst_buffer = make_buffer_for_mdspan<DstLayout>(dst_extents, 0);
cuda::std::mdspan<int, SrcExtents, SrcLayout> src(src_buffer.data(), src_extents);
cuda::std::mdspan<int, DstExtents, DstLayout> dst(dst_buffer.data(), dst_extents);
for (int i = 0; i < static_cast<int>(src.extent(1)); i++)
{
src(0, i) = i;
}
cuda::copy_bytes(stream, std::move(src), dst);
stream.sync();
for (int i = 0; i < static_cast<int>(dst.extent(1)); i++)
{
CHECK(dst(0, i) == i);
}
}
C2H_TEST("Mdspan copy", "[data_manipulation]")
{
cuda::stream stream{cuda::device_ref{0}};
SECTION("Different extents")
{
auto static_extents = cuda::std::extents<size_t, 3, 4>();
test_mdspan_copy_bytes(stream, static_extents, static_extents);
test_mdspan_copy_bytes<cuda::std::layout_left>(stream, static_extents, static_extents);
auto dynamic_extents = cuda::std::dextents<size_t, 2>(3, 4);
test_mdspan_copy_bytes(stream, dynamic_extents, dynamic_extents);
test_mdspan_copy_bytes(stream, static_extents, dynamic_extents);
test_mdspan_copy_bytes<cuda::std::layout_left>(stream, static_extents, dynamic_extents);
auto mixed_extents = cuda::std::extents<int, cuda::std::dynamic_extent, 4>(3);
test_mdspan_copy_bytes(stream, dynamic_extents, mixed_extents);
test_mdspan_copy_bytes(stream, mixed_extents, static_extents);
test_mdspan_copy_bytes<cuda::std::layout_left>(stream, mixed_extents, static_extents);
}
SECTION("Launch transform")
{
auto host_resource = cuda::mr::legacy_pinned_memory_resource{};
auto mixed_extents =
cuda::std::extents<size_t, 1024, cuda::std::dynamic_extent, 2, cuda::std::dynamic_extent>(1024, 2);
[[maybe_unused]] auto static_extents = cuda::std::extents<size_t, 1024, 1024, 2, 2>();
auto mdspan_buffer = make_buffer_for_mdspan(mixed_extents, 1);
cuda::std::mdspan<int, decltype(mixed_extents)> mdspan(mdspan_buffer.data(), mixed_extents);
cudax::weird_buffer<cuda::std::mdspan<int, decltype(static_extents)>> buffer{
host_resource, mdspan.mapping().required_span_size()};
cuda::copy_bytes(stream, mdspan, buffer);
stream.sync();
REQUIRE(!memcmp(mdspan_buffer.data(), buffer.data, mdspan_buffer.size()));
}
}
C2H_TEST("Non exhaustive mdspan copy_bytes", "[data_manipulation]")
{
cuda::stream stream{cuda::device_ref{0}};
{
auto fake_strided_mdspan = create_fake_strided_mdspan();
try
{
cuda::copy_bytes(stream, fake_strided_mdspan, fake_strided_mdspan);
}
catch (const ::std::invalid_argument& e)
{
CHECK(e.what() == ::std::string("copy_bytes supports only exhaustive mdspans"));
}
}
}

93
cccl_upstream/cudax/test/algorithm/fill.cu
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//===----------------------------------------------------------------------===//
//
// Part of CUDA Experimental in CUDA C++ Core Libraries,
// under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
#include "common.cuh"
C2H_TEST("Fill", "[data_manipulation]")
{
cuda::stream _stream{cuda::device_ref{0}};
SECTION("Host resource")
{
cuda::mr::legacy_pinned_memory_resource host_resource;
cudax::uninitialized_buffer<int, cuda::mr::device_accessible> buffer(host_resource, buffer_size);
cuda::fill_bytes(_stream, buffer, fill_byte);
check_result_and_erase(_stream, cuda::std::span(buffer));
}
SECTION("Device resource")
{
cuda::device_memory_pool_ref device_resource = cuda::device_default_memory_pool(cuda::device_ref{0});
cudax::uninitialized_buffer<int, cuda::mr::device_accessible> buffer(device_resource, buffer_size);
cuda::fill_bytes(_stream, buffer, fill_byte);
std::vector<int> host_vector(42);
REQUIRE_CUDART(cudaMemcpyAsync(
host_vector.data(), buffer.data(), buffer.size() * sizeof(int), cudaMemcpyDefault, _stream.get()));
check_result_and_erase(_stream, host_vector);
}
SECTION("Launch transform")
{
cuda::mr::legacy_pinned_memory_resource host_resource;
cudax::weird_buffer buffer(host_resource, buffer_size);
cuda::fill_bytes(_stream, buffer, fill_byte);
check_result_and_erase(_stream, cuda::std::span(buffer.data, buffer.size));
}
}
C2H_TEST("Mdspan Fill", "[data_manipulation]")
{
cuda::stream stream{cuda::device_ref{0}};
{
cuda::std::dextents<size_t, 3> dynamic_extents{1, 2, 3};
auto buffer = make_buffer_for_mdspan(dynamic_extents, 0);
cuda::std::mdspan<int, decltype(dynamic_extents)> dynamic_mdspan(buffer.data(), dynamic_extents);
cuda::fill_bytes(stream, dynamic_mdspan, fill_byte);
check_result_and_erase(stream, cuda::std::span(buffer.data(), buffer.size()));
}
{
cuda::std::extents<size_t, 2, cuda::std::dynamic_extent, 4> mixed_extents{1};
auto buffer = make_buffer_for_mdspan(mixed_extents, 0);
cuda::std::mdspan<int, decltype(mixed_extents)> mixed_mdspan(buffer.data(), mixed_extents);
cuda::fill_bytes(stream, cuda::std::move(mixed_mdspan), fill_byte);
check_result_and_erase(stream, cuda::std::span(buffer.data(), buffer.size()));
}
{
cuda::mr::legacy_pinned_memory_resource host_resource;
using static_extents = cuda::std::extents<size_t, 2, 3, 4>;
auto size = cuda::std::layout_left::mapping<static_extents>().required_span_size();
cudax::weird_buffer<cuda::std::mdspan<int, static_extents>> buffer(host_resource, size);
cuda::fill_bytes(stream, buffer, fill_byte);
check_result_and_erase(stream, cuda::std::span(buffer.data, buffer.size));
}
}
C2H_TEST("Non exhaustive mdspan fill_bytes", "[data_manipulation]")
{
cuda::stream stream{cuda::device_ref{0}};
{
auto fake_strided_mdspan = create_fake_strided_mdspan();
try
{
cuda::fill_bytes(stream, fake_strided_mdspan, fill_byte);
}
catch (const ::std::invalid_argument& e)
{
CHECK(e.what() == ::std::string("fill_bytes supports only exhaustive mdspans"));
}
}
}