337 lines
9.8 KiB
C++
337 lines
9.8 KiB
C++
// SPDX-FileCopyrightText: Copyright 2020 yuzu Emulator Project
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <algorithm>
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#include <mutex>
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#include <string>
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#include <tuple>
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#ifdef _WIN32
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#include "common/windows/timer_resolution.h"
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#endif
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#ifdef ARCHITECTURE_x86_64
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#include "common/x64/cpu_wait.h"
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#endif
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#include "common/microprofile.h"
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#include "core/core_timing.h"
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#include "core/hardware_properties.h"
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namespace Core::Timing {
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constexpr s64 MAX_SLICE_LENGTH = 10000;
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std::shared_ptr<EventType> CreateEvent(std::string name, TimedCallback&& callback) {
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return std::make_shared<EventType>(std::move(callback), std::move(name));
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}
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struct CoreTiming::Event {
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s64 time;
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u64 fifo_order;
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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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friend bool operator>(const Event& left, const Event& right) {
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return std::tie(left.time, left.fifo_order) > std::tie(right.time, right.fifo_order);
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}
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friend bool operator<(const Event& left, const Event& right) {
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return std::tie(left.time, left.fifo_order) < std::tie(right.time, right.fifo_order);
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}
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};
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CoreTiming::CoreTiming() : clock{Common::CreateOptimalClock()} {}
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CoreTiming::~CoreTiming() {
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Reset();
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}
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void CoreTiming::ThreadEntry(CoreTiming& instance) {
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static constexpr char name[] = "HostTiming";
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MicroProfileOnThreadCreate(name);
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Common::SetCurrentThreadName(name);
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Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
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instance.on_thread_init();
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instance.ThreadLoop();
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MicroProfileOnThreadExit();
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}
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void CoreTiming::Initialize(std::function<void()>&& on_thread_init_) {
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Reset();
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on_thread_init = std::move(on_thread_init_);
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event_fifo_id = 0;
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shutting_down = false;
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cpu_ticks = 0;
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const auto empty_timed_callback = [](std::uintptr_t, u64, std::chrono::nanoseconds)
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-> std::optional<std::chrono::nanoseconds> { return std::nullopt; };
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ev_lost = CreateEvent("_lost_event", empty_timed_callback);
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if (is_multicore) {
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timer_thread = std::make_unique<std::jthread>(ThreadEntry, std::ref(*this));
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}
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}
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void CoreTiming::ClearPendingEvents() {
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std::scoped_lock lock{basic_lock};
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event_queue.clear();
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}
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void CoreTiming::Pause(bool is_paused) {
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paused = is_paused;
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pause_event.Set();
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if (!is_paused) {
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pause_end_time = GetGlobalTimeNs().count();
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}
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}
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void CoreTiming::SyncPause(bool is_paused) {
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if (is_paused == paused && paused_set == paused) {
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return;
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}
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Pause(is_paused);
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if (timer_thread) {
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if (!is_paused) {
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pause_event.Set();
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}
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event.Set();
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while (paused_set != is_paused)
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;
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}
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if (!is_paused) {
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pause_end_time = GetGlobalTimeNs().count();
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}
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}
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bool CoreTiming::IsRunning() const {
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return !paused_set;
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}
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bool CoreTiming::HasPendingEvents() const {
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std::scoped_lock lock{basic_lock};
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return !(wait_set && event_queue.empty());
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}
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void CoreTiming::ScheduleEvent(std::chrono::nanoseconds ns_into_future,
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const std::shared_ptr<EventType>& event_type,
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std::uintptr_t user_data, bool absolute_time) {
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{
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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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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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}
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void CoreTiming::ScheduleLoopingEvent(std::chrono::nanoseconds start_time,
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std::chrono::nanoseconds resched_time,
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const std::shared_ptr<EventType>& event_type,
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std::uintptr_t user_data, bool absolute_time) {
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{
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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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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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}
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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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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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// Force any in-progress events to finish
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if (wait) {
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std::scoped_lock lk{advance_lock};
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}
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}
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void CoreTiming::AddTicks(u64 ticks_to_add) {
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cpu_ticks += ticks_to_add;
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downcount -= static_cast<s64>(cpu_ticks);
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}
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void CoreTiming::Idle() {
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cpu_ticks += 1000U;
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}
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void CoreTiming::ResetTicks() {
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downcount = MAX_SLICE_LENGTH;
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}
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u64 CoreTiming::GetClockTicks() const {
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if (is_multicore) [[likely]] {
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return clock->GetCNTPCT();
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}
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return Common::WallClock::CPUTickToCNTPCT(cpu_ticks);
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}
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u64 CoreTiming::GetGPUTicks() const {
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if (is_multicore) [[likely]] {
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return clock->GetGPUTick();
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}
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return Common::WallClock::CPUTickToGPUTick(cpu_ticks);
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}
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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.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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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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event_queue.pop();
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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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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
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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.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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global_timer = GetGlobalTimeNs().count();
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}
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if (!event_queue.empty()) {
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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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}
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void CoreTiming::ThreadLoop() {
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has_started = true;
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while (!shutting_down) {
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while (!paused) {
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paused_set = false;
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const auto next_time = Advance();
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if (next_time) {
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// There are more events left in the queue, wait until the next event.
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auto wait_time = *next_time - GetGlobalTimeNs().count();
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if (wait_time > 0) {
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#ifdef _WIN32
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while (!paused && !event.IsSet() && wait_time > 0) {
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wait_time = *next_time - GetGlobalTimeNs().count();
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if (wait_time >= timer_resolution_ns) {
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Common::Windows::SleepForOneTick();
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} else {
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#ifdef ARCHITECTURE_x86_64
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Common::X64::MicroSleep();
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#else
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std::this_thread::yield();
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#endif
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}
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}
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if (event.IsSet()) {
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event.Reset();
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}
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#else
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event.WaitFor(std::chrono::nanoseconds(wait_time));
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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
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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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wait_set = false;
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}
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paused_set = true;
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pause_event.Wait();
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}
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}
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void CoreTiming::Reset() {
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paused = true;
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shutting_down = true;
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pause_event.Set();
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event.Set();
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if (timer_thread) {
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timer_thread->join();
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}
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timer_thread.reset();
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has_started = false;
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}
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std::chrono::nanoseconds CoreTiming::GetGlobalTimeNs() const {
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if (is_multicore) [[likely]] {
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return clock->GetTimeNS();
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}
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return std::chrono::nanoseconds{Common::WallClock::CPUTickToNS(cpu_ticks)};
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}
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std::chrono::microseconds CoreTiming::GetGlobalTimeUs() const {
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if (is_multicore) [[likely]] {
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return clock->GetTimeUS();
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}
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return std::chrono::microseconds{Common::WallClock::CPUTickToUS(cpu_ticks)};
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}
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#ifdef _WIN32
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void CoreTiming::SetTimerResolutionNs(std::chrono::nanoseconds ns) {
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timer_resolution_ns = ns.count();
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}
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#endif
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} // namespace Core::Timing
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