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Diffstat (limited to 'boost/fiber/algo/numa/work_stealing.hpp')
-rw-r--r-- | boost/fiber/algo/numa/work_stealing.hpp | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/boost/fiber/algo/numa/work_stealing.hpp b/boost/fiber/algo/numa/work_stealing.hpp new file mode 100644 index 0000000000..26032ab35e --- /dev/null +++ b/boost/fiber/algo/numa/work_stealing.hpp @@ -0,0 +1,93 @@ + +// Copyright Oliver Kowalke 2017. +// Distributed under the Boost Software License, Version 1.0. +// (See accompanying file LICENSE_1_0.txt or copy at +// http://www.boost.org/LICENSE_1_0.txt) +// + +#ifndef BOOST_FIBERS_ALGO_NUMA_WORK_STEALING_H +#define BOOST_FIBERS_ALGO_NUMA_WORK_STEALING_H + +#include <condition_variable> +#include <chrono> +#include <cstddef> +#include <cstdint> +#include <mutex> +#include <vector> + +#include <boost/config.hpp> +#include <boost/intrusive_ptr.hpp> + +#include <boost/fiber/algo/algorithm.hpp> +#include <boost/fiber/context.hpp> +#include <boost/fiber/detail/config.hpp> +#include <boost/fiber/detail/context_spinlock_queue.hpp> +#include <boost/fiber/detail/context_spmc_queue.hpp> +#include <boost/fiber/numa/pin_thread.hpp> +#include <boost/fiber/numa/topology.hpp> +#include <boost/fiber/scheduler.hpp> + +#ifdef BOOST_HAS_ABI_HEADERS +# include BOOST_ABI_PREFIX +#endif + +namespace boost { +namespace fibers { +namespace algo { +namespace numa { + +class work_stealing : public algorithm { +private: + static std::vector< intrusive_ptr< work_stealing > > schedulers_; + + std::uint32_t cpu_id_; + std::vector< std::uint32_t > local_cpus_; + std::vector< std::uint32_t > remote_cpus_; +#ifdef BOOST_FIBERS_USE_SPMC_QUEUE + detail::context_spmc_queue rqueue_{}; +#else + detail::context_spinlock_queue rqueue_{}; +#endif + std::mutex mtx_{}; + std::condition_variable cnd_{}; + bool flag_{ false }; + bool suspend_; + + static void init_( std::vector< boost::fibers::numa::node > const&, + std::vector< intrusive_ptr< work_stealing > > &); + +public: + work_stealing( std::uint32_t, std::uint32_t, + std::vector< boost::fibers::numa::node > const&, + bool = false); + + work_stealing( work_stealing const&) = delete; + work_stealing( work_stealing &&) = delete; + + work_stealing & operator=( work_stealing const&) = delete; + work_stealing & operator=( work_stealing &&) = delete; + + virtual void awakened( context *) noexcept; + + virtual context * pick_next() noexcept; + + virtual context * steal() noexcept { + return rqueue_.steal(); + } + + virtual bool has_ready_fibers() const noexcept { + return ! rqueue_.empty(); + } + + virtual void suspend_until( std::chrono::steady_clock::time_point const&) noexcept; + + virtual void notify() noexcept; +}; + +}}}} + +#ifdef BOOST_HAS_ABI_HEADERS +# include BOOST_ABI_SUFFIX +#endif + +#endif // BOOST_FIBERS_ALGO_NUMA_WORK_STEALING_H |