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project_6/cccl_upstream/cudax/test/execution/test_sequence.cu
EngineX CI 56fd68e7dd [INFRA] Import NVIDIA/CCCL upstream as optimization reference library
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
2026-07-30 09:35:51 +00:00

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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) 2025 NVIDIA CORPORATION & AFFILIATES.
//
//===----------------------------------------------------------------------===//
// Include this first
#include <cuda/experimental/execution.cuh>
// Then include the test helpers
#include <nv/target>
#include "common/checked_receiver.cuh"
#include "common/utility.cuh"
#include "testing.cuh"
namespace ex = cuda::experimental::execution;
namespace
{
C2H_TEST("simple use of sequence executes both child operations", "[adaptors][sequence]")
{
bool flag1{false};
bool flag2{false};
auto sndr1 = ex::sequence(
ex::just() | ex::then([&] {
flag1 = true;
}),
ex::just() | ex::then([&] {
flag2 = true;
}));
check_value_types<types<>>(sndr1);
check_sends_stopped<false>(sndr1);
check_error_types<ex::exception_ptr>(sndr1);
auto op = ex::connect(std::move(sndr1), checked_value_receiver<>{});
ex::start(op);
CHECK(flag1);
CHECK(flag2);
}
} // namespace