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
121 lines
3.6 KiB
Plaintext
121 lines
3.6 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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#pragma once
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#include <cuda/__utility/immovable.h>
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#include <cuda/experimental/execution.cuh>
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#include "testing.cuh" // IWYU pragma: keep
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namespace
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{
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struct _stopped_scheduler_attrs_t
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{
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template <class _Env>
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_CCCL_HOST_DEVICE auto
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query(cudax_async::get_completion_scheduler_t<cudax_async::set_value_t>, const _Env& env) const noexcept
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-> decltype(cudax_async::get_completion_scheduler<cudax_async::set_value_t>(env, env))
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{
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return cudax_async::get_completion_scheduler<cudax_async::set_value_t>(env, env);
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}
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template <class _Env>
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_CCCL_HOST_DEVICE auto
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query(cudax_async::get_completion_scheduler_t<cudax_async::set_stopped_t>, const _Env& env) const noexcept
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-> decltype(cudax_async::get_completion_scheduler<cudax_async::set_stopped_t>(env, env))
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{
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return cudax_async::get_completion_scheduler<cudax_async::set_stopped_t>(env, env);
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}
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template <class _Env>
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_CCCL_HOST_DEVICE auto
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query(cudax_async::get_completion_domain_t<cudax_async::set_value_t>, const _Env& env) const noexcept
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-> decltype(cudax_async::get_completion_domain<cudax_async::set_value_t>(env, env))
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{
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return cudax_async::get_completion_domain<cudax_async::set_value_t>(env, env);
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}
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template <class _Env>
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_CCCL_HOST_DEVICE auto
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query(cudax_async::get_completion_domain_t<cudax_async::set_stopped_t>, const _Env& env) const noexcept
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-> decltype(cudax_async::get_completion_domain<cudax_async::set_stopped_t>(env, env))
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{
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return cudax_async::get_completion_domain<cudax_async::set_stopped_t>(env, env);
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}
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_CCCL_HOST_DEVICE static constexpr auto query(cudax_async::get_completion_behavior_t) noexcept
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{
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return cudax_async::completion_behavior::inline_completion;
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}
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};
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//! Scheduler that returns a sender that always completes with stopped.
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struct stopped_scheduler : _stopped_scheduler_attrs_t
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{
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private:
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template <class Rcvr>
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struct _opstate_t : cuda::__immovable
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{
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using operation_state_concept = cudax_async::operation_state_t;
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Rcvr _rcvr;
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_CCCL_HOST_DEVICE void start() noexcept
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{
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cudax_async::set_stopped(static_cast<Rcvr&&>(_rcvr));
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}
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};
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struct _sndr_t
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{
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using sender_concept = cudax_async::sender_t;
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template <class Self>
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_CCCL_HOST_DEVICE static constexpr auto get_completion_signatures()
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{
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return cudax_async::completion_signatures<cudax_async::set_value_t(), cudax_async::set_stopped_t()>();
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}
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template <class Rcvr>
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_CCCL_HOST_DEVICE auto connect(Rcvr rcvr) const noexcept -> _opstate_t<Rcvr>
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{
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return {{}, static_cast<Rcvr&&>(rcvr)};
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}
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_CCCL_HOST_DEVICE auto get_env() const noexcept -> _stopped_scheduler_attrs_t
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{
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return {};
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}
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};
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public:
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using scheduler_concept = cudax_async::scheduler_t;
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stopped_scheduler() = default;
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_CCCL_HOST_DEVICE auto schedule() const noexcept -> _sndr_t
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{
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return {};
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}
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_CCCL_HOST_DEVICE friend constexpr bool operator==(stopped_scheduler, stopped_scheduler) noexcept
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{
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return true;
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}
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_CCCL_HOST_DEVICE friend constexpr bool operator!=(stopped_scheduler, stopped_scheduler) noexcept
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{
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return false;
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}
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};
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} // namespace
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