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early-access version 2887

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pineappleEA
2022-08-02 08:42:45 +02:00
parent f23ace47e6
commit dbdc64c687
3 changed files with 28 additions and 22 deletions
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39
src/core/core_timing.cpp
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@@ -143,13 +143,17 @@ void CoreTiming::ScheduleLoopingEvent(std::chrono::nanoseconds start_time,
std::chrono::nanoseconds resched_time,
const std::shared_ptr<EventType>& event_type,
std::uintptr_t user_data, bool absolute_time) {
std::scoped_lock scope{basic_lock};
const auto next_time{absolute_time ? start_time : GetGlobalTimeNs() + start_time};
{
std::scoped_lock scope{basic_lock};
const auto next_time{absolute_time ? start_time : GetGlobalTimeNs() + start_time};
event_queue.emplace_back(
Event{next_time.count(), event_fifo_id++, user_data, event_type, resched_time.count()});
event_queue.emplace_back(
Event{next_time.count(), event_fifo_id++, user_data, event_type, resched_time.count()});
std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
std::push_heap(event_queue.begin(), event_queue.end(), std::greater<>());
}
event.Set();
}
void CoreTiming::UnscheduleEvent(const std::shared_ptr<EventType>& event_type,
@@ -277,20 +281,21 @@ void CoreTiming::ThreadLoop() {
paused_set = false;
const auto next_time = Advance();
if (next_time) {
// There are more events left in the queue, sleep until the next event.
const auto diff_ns{*next_time - GetGlobalTimeNs().count()};
if (diff_ns > 0) {
// Only try to sleep if the remaining time is >= 1ms. Take off 500 microseconds
// from the target time to account for possible over-sleeping, and spin the
// remaining.
const auto sleep_time_ns{diff_ns - 500LL * 1'000LL};
const auto sleep_time_ms{sleep_time_ns / 1'000'000LL};
if (sleep_time_ms >= 1) {
event.WaitFor(std::chrono::nanoseconds(sleep_time_ns));
// There are more events left in the queue, wait until the next event.
const auto wait_time = *next_time - GetGlobalTimeNs().count();
if (wait_time > 0) {
// Assume a timer resolution of 1ms.
static constexpr s64 TimerResolutionNS = 1000000;
// Sleep in discrete intervals of the timer resolution, and spin the rest.
const auto sleep_time = wait_time - (wait_time % TimerResolutionNS);
if (sleep_time > 0) {
event.WaitFor(std::chrono::nanoseconds(sleep_time));
}
const auto end_time{std::chrono::nanoseconds(*next_time)};
while (!paused && !event.IsSet() && GetGlobalTimeNs() < end_time) {
while (!paused && !event.IsSet() && GetGlobalTimeNs().count() < *next_time) {
// Yield to reduce thread starvation.
std::this_thread::yield();
}
if (event.IsSet()) {