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Merge pull request #9917 from Morph1984/the-real-time
native_clock: Re-adjust the RDTSC frequency to its real frequency
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commit
021af4fd00
@ -135,7 +135,7 @@ void AudioRenderer::ThreadFunc() {
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static constexpr char name[]{"AudioRenderer"};
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MicroProfileOnThreadCreate(name);
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Common::SetCurrentThreadName(name);
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Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
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Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
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if (mailbox->ADSPWaitMessage() != RenderMessage::AudioRenderer_InitializeOK) {
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LOG_ERROR(Service_Audio,
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"ADSP Audio Renderer -- Failed to receive initialize message from host!");
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@ -23,6 +23,19 @@ static s64 WindowsQueryPerformanceCounter() {
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QueryPerformanceCounter(&counter);
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return counter.QuadPart;
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}
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static s64 GetSystemTimeNS() {
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// GetSystemTimePreciseAsFileTime returns the file time in 100ns units.
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static constexpr s64 Multiplier = 100;
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// Convert Windows epoch to Unix epoch.
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static constexpr s64 WindowsEpochToUnixEpochNS = 0x19DB1DED53E8000LL;
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FILETIME filetime;
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GetSystemTimePreciseAsFileTime(&filetime);
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return Multiplier * ((static_cast<s64>(filetime.dwHighDateTime) << 32) +
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static_cast<s64>(filetime.dwLowDateTime)) -
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WindowsEpochToUnixEpochNS;
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}
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#endif
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SteadyClock::time_point SteadyClock::Now() noexcept {
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@ -53,4 +66,16 @@ SteadyClock::time_point SteadyClock::Now() noexcept {
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#endif
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}
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RealTimeClock::time_point RealTimeClock::Now() noexcept {
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#if defined(_WIN32)
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return time_point{duration{GetSystemTimeNS()}};
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#elif defined(__APPLE__)
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return time_point{duration{clock_gettime_nsec_np(CLOCK_REALTIME)}};
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#else
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timespec ts;
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clock_gettime(CLOCK_REALTIME, &ts);
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return time_point{std::chrono::seconds{ts.tv_sec} + std::chrono::nanoseconds{ts.tv_nsec}};
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#endif
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}
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}; // namespace Common
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@ -20,4 +20,15 @@ struct SteadyClock {
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[[nodiscard]] static time_point Now() noexcept;
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};
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struct RealTimeClock {
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using rep = s64;
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using period = std::nano;
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using duration = std::chrono::nanoseconds;
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using time_point = std::chrono::time_point<RealTimeClock>;
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static constexpr bool is_steady = false;
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[[nodiscard]] static time_point Now() noexcept;
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};
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} // namespace Common
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@ -53,11 +53,11 @@ u64 EstimateRDTSCFrequency() {
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FencedRDTSC();
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// Get the current time.
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const auto start_time = Common::SteadyClock::Now();
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const auto start_time = Common::RealTimeClock::Now();
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const u64 tsc_start = FencedRDTSC();
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// Wait for 250 milliseconds.
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std::this_thread::sleep_for(std::chrono::milliseconds{250});
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const auto end_time = Common::SteadyClock::Now();
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const auto end_time = Common::RealTimeClock::Now();
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const u64 tsc_end = FencedRDTSC();
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// Calculate differences.
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const u64 timer_diff = static_cast<u64>(
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@ -72,13 +72,29 @@ NativeClock::NativeClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequen
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u64 rtsc_frequency_)
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: WallClock(emulated_cpu_frequency_, emulated_clock_frequency_, true), rtsc_frequency{
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rtsc_frequency_} {
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// Thread to re-adjust the RDTSC frequency after 10 seconds has elapsed.
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time_sync_thread = std::jthread{[this](std::stop_token token) {
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// Get the current time.
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const auto start_time = Common::RealTimeClock::Now();
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const u64 tsc_start = FencedRDTSC();
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// Wait for 10 seconds.
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if (!Common::StoppableTimedWait(token, std::chrono::seconds{10})) {
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return;
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}
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const auto end_time = Common::RealTimeClock::Now();
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const u64 tsc_end = FencedRDTSC();
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// Calculate differences.
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const u64 timer_diff = static_cast<u64>(
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std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time).count());
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const u64 tsc_diff = tsc_end - tsc_start;
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const u64 tsc_freq = MultiplyAndDivide64(tsc_diff, 1000000000ULL, timer_diff);
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rtsc_frequency = tsc_freq;
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CalculateAndSetFactors();
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}};
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time_point.inner.last_measure = FencedRDTSC();
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time_point.inner.accumulated_ticks = 0U;
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ns_rtsc_factor = GetFixedPoint64Factor(NS_RATIO, rtsc_frequency);
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us_rtsc_factor = GetFixedPoint64Factor(US_RATIO, rtsc_frequency);
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ms_rtsc_factor = GetFixedPoint64Factor(MS_RATIO, rtsc_frequency);
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clock_rtsc_factor = GetFixedPoint64Factor(emulated_clock_frequency, rtsc_frequency);
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cpu_rtsc_factor = GetFixedPoint64Factor(emulated_cpu_frequency, rtsc_frequency);
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CalculateAndSetFactors();
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}
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u64 NativeClock::GetRTSC() {
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@ -138,6 +154,14 @@ u64 NativeClock::GetCPUCycles() {
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return MultiplyHigh(rtsc_value, cpu_rtsc_factor);
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}
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void NativeClock::CalculateAndSetFactors() {
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ns_rtsc_factor = GetFixedPoint64Factor(NS_RATIO, rtsc_frequency);
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us_rtsc_factor = GetFixedPoint64Factor(US_RATIO, rtsc_frequency);
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ms_rtsc_factor = GetFixedPoint64Factor(MS_RATIO, rtsc_frequency);
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clock_rtsc_factor = GetFixedPoint64Factor(emulated_clock_frequency, rtsc_frequency);
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cpu_rtsc_factor = GetFixedPoint64Factor(emulated_cpu_frequency, rtsc_frequency);
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}
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} // namespace X64
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} // namespace Common
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@ -3,6 +3,7 @@
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#pragma once
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#include "common/polyfill_thread.h"
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#include "common/wall_clock.h"
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namespace Common {
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@ -28,6 +29,8 @@ public:
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private:
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u64 GetRTSC();
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void CalculateAndSetFactors();
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union alignas(16) TimePoint {
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TimePoint() : pack{} {}
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u128 pack{};
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@ -47,6 +50,8 @@ private:
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u64 ms_rtsc_factor{};
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u64 rtsc_frequency;
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std::jthread time_sync_thread;
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};
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} // namespace X64
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@ -53,7 +53,7 @@ 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::Critical);
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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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@ -192,7 +192,7 @@ void CpuManager::RunThread(std::stop_token token, std::size_t core) {
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}
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MicroProfileOnThreadCreate(name.c_str());
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Common::SetCurrentThreadName(name.c_str());
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Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
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Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
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auto& data = core_data[core];
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data.host_context = Common::Fiber::ThreadToFiber();
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@ -26,7 +26,7 @@ void Controller_Stubbed::OnUpdate(const Core::Timing::CoreTiming& core_timing) {
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}
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CommonHeader header{};
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header.timestamp = core_timing.GetCPUTicks();
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header.timestamp = core_timing.GetGlobalTimeNs().count();
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header.total_entry_count = 17;
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header.entry_count = 0;
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header.last_entry_index = 0;
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@ -32,7 +32,7 @@ void Controller_Touchscreen::OnInit() {}
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void Controller_Touchscreen::OnRelease() {}
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void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timing) {
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shared_memory->touch_screen_lifo.timestamp = core_timing.GetCPUTicks();
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shared_memory->touch_screen_lifo.timestamp = core_timing.GetGlobalTimeNs().count();
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if (!IsControllerActivated()) {
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shared_memory->touch_screen_lifo.buffer_count = 0;
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@ -85,7 +85,7 @@ void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timin
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const auto active_fingers_count =
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static_cast<std::size_t>(std::distance(active_fingers.begin(), end_iter));
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const u64 tick = core_timing.GetCPUTicks();
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const u64 timestamp = static_cast<u64>(core_timing.GetGlobalTimeNs().count());
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const auto& last_entry = shared_memory->touch_screen_lifo.ReadCurrentEntry().state;
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next_state.sampling_number = last_entry.sampling_number + 1;
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@ -102,8 +102,8 @@ void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timin
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touch_entry.diameter_x = Settings::values.touchscreen.diameter_x;
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touch_entry.diameter_y = Settings::values.touchscreen.diameter_y;
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touch_entry.rotation_angle = Settings::values.touchscreen.rotation_angle;
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touch_entry.delta_time = tick - active_fingers[id].last_touch;
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fingers[active_fingers[id].id].last_touch = tick;
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touch_entry.delta_time = timestamp - active_fingers[id].last_touch;
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fingers[active_fingers[id].id].last_touch = timestamp;
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touch_entry.finger = active_fingers[id].id;
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touch_entry.attribute.raw = active_fingers[id].attribute.raw;
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} else {
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@ -126,8 +126,8 @@ double PerfStats::GetLastFrameTimeScale() const {
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}
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void SpeedLimiter::DoSpeedLimiting(microseconds current_system_time_us) {
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if (!Settings::values.use_speed_limit.GetValue() ||
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Settings::values.use_multi_core.GetValue()) {
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if (Settings::values.use_multi_core.GetValue() ||
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!Settings::values.use_speed_limit.GetValue()) {
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return;
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}
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@ -25,7 +25,7 @@ static void RunThread(std::stop_token stop_token, Core::System& system,
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SCOPE_EXIT({ MicroProfileOnThreadExit(); });
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Common::SetCurrentThreadName(name.c_str());
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Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
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Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
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system.RegisterHostThread();
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auto current_context = context.Acquire();
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