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Merge pull request #11493 from merryhime/evt
core_timing: Replace queue with a fibonacci heap
This commit is contained in:
commit
184ee2d890
3 changed files with 52 additions and 38 deletions
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@ -32,6 +32,7 @@ struct CoreTiming::Event {
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std::uintptr_t user_data;
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std::weak_ptr<EventType> type;
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s64 reschedule_time;
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heap_t::handle_type handle{};
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// Sort by time, unless the times are the same, in which case sort by
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// the order added to the queue
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@ -122,9 +123,9 @@ void CoreTiming::ScheduleEvent(std::chrono::nanoseconds ns_into_future,
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std::scoped_lock scope{basic_lock};
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const auto next_time{absolute_time ? ns_into_future : GetGlobalTimeNs() + ns_into_future};
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event_queue.emplace_back(
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Event{next_time.count(), event_fifo_id++, user_data, event_type, 0});
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std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
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auto h{event_queue.emplace(
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Event{next_time.count(), event_fifo_id++, user_data, event_type, 0})};
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(*h).handle = h;
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}
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event.Set();
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@ -138,10 +139,9 @@ void CoreTiming::ScheduleLoopingEvent(std::chrono::nanoseconds start_time,
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std::scoped_lock scope{basic_lock};
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const auto next_time{absolute_time ? start_time : GetGlobalTimeNs() + start_time};
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event_queue.emplace_back(
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Event{next_time.count(), event_fifo_id++, user_data, event_type, resched_time.count()});
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std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
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auto h{event_queue.emplace(Event{next_time.count(), event_fifo_id++, user_data, event_type,
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resched_time.count()})};
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(*h).handle = h;
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}
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event.Set();
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@ -151,15 +151,17 @@ void CoreTiming::UnscheduleEvent(const std::shared_ptr<EventType>& event_type,
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std::uintptr_t user_data, bool wait) {
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{
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std::scoped_lock lk{basic_lock};
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const auto itr =
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std::remove_if(event_queue.begin(), event_queue.end(), [&](const Event& e) {
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return e.type.lock().get() == event_type.get() && e.user_data == user_data;
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});
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// Removing random items breaks the invariant so we have to re-establish it.
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if (itr != event_queue.end()) {
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event_queue.erase(itr, event_queue.end());
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std::make_heap(event_queue.begin(), event_queue.end(), std::greater<>());
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std::vector<heap_t::handle_type> to_remove;
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for (auto itr = event_queue.begin(); itr != event_queue.end(); itr++) {
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const Event& e = *itr;
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if (e.type.lock().get() == event_type.get() && e.user_data == user_data) {
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to_remove.push_back(itr->handle);
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}
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}
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for (auto h : to_remove) {
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event_queue.erase(h);
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}
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}
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@ -200,35 +202,45 @@ std::optional<s64> CoreTiming::Advance() {
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std::scoped_lock lock{advance_lock, basic_lock};
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global_timer = GetGlobalTimeNs().count();
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while (!event_queue.empty() && event_queue.front().time <= global_timer) {
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Event evt = std::move(event_queue.front());
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std::pop_heap(event_queue.begin(), event_queue.end(), std::greater<>());
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event_queue.pop_back();
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while (!event_queue.empty() && event_queue.top().time <= global_timer) {
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const Event& evt = event_queue.top();
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if (const auto event_type{evt.type.lock()}) {
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basic_lock.unlock();
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if (evt.reschedule_time == 0) {
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const auto evt_user_data = evt.user_data;
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const auto evt_time = evt.time;
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const auto new_schedule_time{event_type->callback(
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evt.user_data, evt.time,
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std::chrono::nanoseconds{GetGlobalTimeNs().count() - evt.time})};
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event_queue.pop();
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basic_lock.lock();
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basic_lock.unlock();
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event_type->callback(
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evt_user_data, evt_time,
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std::chrono::nanoseconds{GetGlobalTimeNs().count() - evt_time});
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basic_lock.lock();
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} else {
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basic_lock.unlock();
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const auto new_schedule_time{event_type->callback(
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evt.user_data, evt.time,
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std::chrono::nanoseconds{GetGlobalTimeNs().count() - evt.time})};
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basic_lock.lock();
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if (evt.reschedule_time != 0) {
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const auto next_schedule_time{new_schedule_time.has_value()
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? new_schedule_time.value().count()
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: evt.reschedule_time};
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// If this event was scheduled into a pause, its time now is going to be way behind.
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// Re-set this event to continue from the end of the pause.
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// If this event was scheduled into a pause, its time now is going to be way
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// behind. Re-set this event to continue from the end of the pause.
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auto next_time{evt.time + next_schedule_time};
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if (evt.time < pause_end_time) {
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next_time = pause_end_time + next_schedule_time;
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}
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event_queue.emplace_back(
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Event{next_time, event_fifo_id++, evt.user_data, evt.type, next_schedule_time});
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std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
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event_queue.update(evt.handle, Event{next_time, event_fifo_id++, evt.user_data,
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evt.type, next_schedule_time, evt.handle});
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}
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}
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@ -236,7 +248,7 @@ std::optional<s64> CoreTiming::Advance() {
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}
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if (!event_queue.empty()) {
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return event_queue.front().time;
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return event_queue.top().time;
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} else {
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return std::nullopt;
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}
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@ -274,7 +286,8 @@ void CoreTiming::ThreadLoop() {
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#endif
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}
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} else {
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// Queue is empty, wait until another event is scheduled and signals us to continue.
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// Queue is empty, wait until another event is scheduled and signals us to
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// continue.
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wait_set = true;
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event.Wait();
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}
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@ -11,7 +11,8 @@
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#include <optional>
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#include <string>
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#include <thread>
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#include <vector>
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#include <boost/heap/fibonacci_heap.hpp>
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#include "common/common_types.h"
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#include "common/thread.h"
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@ -151,11 +152,10 @@ private:
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s64 timer_resolution_ns;
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#endif
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// The queue is a min-heap using std::make_heap/push_heap/pop_heap.
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// We don't use std::priority_queue because we need to be able to serialize, unserialize and
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// erase arbitrary events (RemoveEvent()) regardless of the queue order. These aren't
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// accommodated by the standard adaptor class.
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std::vector<Event> event_queue;
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using heap_t =
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boost::heap::fibonacci_heap<CoreTiming::Event, boost::heap::compare<std::greater<>>>;
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heap_t event_queue;
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u64 event_fifo_id = 0;
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std::shared_ptr<EventType> ev_lost;
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@ -12,6 +12,7 @@
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"boost-context",
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"boost-crc",
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"boost-functional",
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"boost-heap",
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"boost-icl",
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"boost-intrusive",
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"boost-mpl",
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