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
98 lines
2.5 KiB
Plaintext
98 lines
2.5 KiB
Plaintext
//===----------------------------------------------------------------------===//
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//
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// Part of CUDA Experimental in CUDA C++ Core Libraries,
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// under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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// SPDX-FileCopyrightText: Copyright (c) 2024 NVIDIA CORPORATION & AFFILIATES.
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//
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//===----------------------------------------------------------------------===//
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#include <cuda/experimental/execution.cuh>
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#include "./common/retry.cuh"
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#include "testing.cuh"
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namespace ex = ::cuda::experimental::execution;
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#if !_CCCL_DEVICE_COMPILATION()
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namespace
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{
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struct try_again
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{};
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class fails_alot
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{
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template <class Receiver>
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struct operation;
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public:
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using sender_concept = ex::sender_t;
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fails_alot() = default;
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__host__ fails_alot(fails_alot&& other) noexcept
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: counter_(std::move(other.counter_))
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{}
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__host__ fails_alot(const fails_alot& other) noexcept
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: counter_(other.counter_)
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{}
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template <class Receiver>
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[[nodiscard]] auto connect(Receiver rcvr) const noexcept -> operation<Receiver>
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{
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return operation<Receiver>{static_cast<Receiver&&>(rcvr), --*counter_};
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}
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template <class...>
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static _CCCL_CONSTEVAL auto get_completion_signatures() noexcept
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{
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return ex::completion_signatures<ex::set_value_t(), ex::set_error_t(try_again)>{};
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}
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private:
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template <class Receiver>
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struct operation
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{
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void start() & noexcept
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{
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if (counter_ == 0)
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{
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ex::set_value(static_cast<Receiver&&>(rcvr_));
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}
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else
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{
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ex::set_error(static_cast<Receiver&&>(rcvr_), try_again{});
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}
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}
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Receiver rcvr_;
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int counter_;
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};
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std::shared_ptr<int> counter_ = std::make_shared<int>(1'000'000);
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};
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// #if defined(REQUIRE_TERMINATE)
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// // For some reason, when compiling with nvc++, the forked process dies with SIGSEGV
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// // but the error code returned from ::wait reports success, so this test fails.
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// TEST_CASE("running deeply recursing algo blows the stack", "[schedulers][trampoline_scheduler]") {
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// auto recurse_deeply = retry(fails_alot{});
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// REQUIRE_TERMINATE([&] { sync_wait(std::move(recurse_deeply)); });
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// }
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// #endif
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TEST_CASE("running deeply recursing algo on trampoline_scheduler doesn't blow the stack",
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"[scheduler][trampoline_scheduler]")
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{
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ex::trampoline_scheduler sched;
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auto recurse_deeply = retry(ex::on(sched, fails_alot{}));
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ex::sync_wait(std::move(recurse_deeply));
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}
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} // namespace
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#endif // !_CCCL_DEVICE_COMPILATION()
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