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Merge pull request #9917 from Morph1984/the-real-time 

native_clock: Re-adjust the RDTSC frequency to its real frequency
merge-requests/60/head
liamwhite 2023-03-10 13:55:11 +07:00 committed by GitHub
parent ec4e2d1fab 67560296c6
commit 021af4fd00
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
11 changed files with 83 additions and 18 deletions
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2
src/audio_core/renderer/adsp/audio_renderer.cpp
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@ -135,7 +135,7 @@ void AudioRenderer::ThreadFunc() {
static constexpr char name[]{"AudioRenderer"};
MicroProfileOnThreadCreate(name);
Common::SetCurrentThreadName(name);
Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
if (mailbox->ADSPWaitMessage() != RenderMessage::AudioRenderer_InitializeOK) {
LOG_ERROR(Service_Audio,
"ADSP Audio Renderer -- Failed to receive initialize message from host!");

25
src/common/steady_clock.cpp
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@ -23,6 +23,19 @@ static s64 WindowsQueryPerformanceCounter() {
QueryPerformanceCounter(&counter);
return counter.QuadPart;
}
static s64 GetSystemTimeNS() {
// GetSystemTimePreciseAsFileTime returns the file time in 100ns units.
static constexpr s64 Multiplier = 100;
// Convert Windows epoch to Unix epoch.
static constexpr s64 WindowsEpochToUnixEpochNS = 0x19DB1DED53E8000LL;
FILETIME filetime;
GetSystemTimePreciseAsFileTime(&filetime);
return Multiplier * ((static_cast<s64>(filetime.dwHighDateTime) << 32) +
static_cast<s64>(filetime.dwLowDateTime)) -
WindowsEpochToUnixEpochNS;
}
#endif
SteadyClock::time_point SteadyClock::Now() noexcept {
@ -53,4 +66,16 @@ SteadyClock::time_point SteadyClock::Now() noexcept {
#endif
}
RealTimeClock::time_point RealTimeClock::Now() noexcept {
#if defined(_WIN32)
return time_point{duration{GetSystemTimeNS()}};
#elif defined(__APPLE__)
return time_point{duration{clock_gettime_nsec_np(CLOCK_REALTIME)}};
#else
timespec ts;
clock_gettime(CLOCK_REALTIME, &ts);
return time_point{std::chrono::seconds{ts.tv_sec} + std::chrono::nanoseconds{ts.tv_nsec}};
#endif
}
}; // namespace Common

11
src/common/steady_clock.h
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@ -20,4 +20,15 @@ struct SteadyClock {
[[nodiscard]] static time_point Now() noexcept;
};
struct RealTimeClock {
using rep = s64;
using period = std::nano;
using duration = std::chrono::nanoseconds;
using time_point = std::chrono::time_point<RealTimeClock>;
static constexpr bool is_steady = false;
[[nodiscard]] static time_point Now() noexcept;
};
} // namespace Common

38
src/common/x64/native_clock.cpp
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@ -53,11 +53,11 @@ u64 EstimateRDTSCFrequency() {
FencedRDTSC();
// Get the current time.
const auto start_time = Common::SteadyClock::Now();
const auto start_time = Common::RealTimeClock::Now();
const u64 tsc_start = FencedRDTSC();
// Wait for 250 milliseconds.
std::this_thread::sleep_for(std::chrono::milliseconds{250});
const auto end_time = Common::SteadyClock::Now();
const auto end_time = Common::RealTimeClock::Now();
const u64 tsc_end = FencedRDTSC();
// Calculate differences.
const u64 timer_diff = static_cast<u64>(
@ -72,13 +72,29 @@ NativeClock::NativeClock(u64 emulated_cpu_frequency_, u64 emulated_clock_frequen
u64 rtsc_frequency_)
: WallClock(emulated_cpu_frequency_, emulated_clock_frequency_, true), rtsc_frequency{
rtsc_frequency_} {
// Thread to re-adjust the RDTSC frequency after 10 seconds has elapsed.
time_sync_thread = std::jthread{[this](std::stop_token token) {
// Get the current time.
const auto start_time = Common::RealTimeClock::Now();
const u64 tsc_start = FencedRDTSC();
// Wait for 10 seconds.
if (!Common::StoppableTimedWait(token, std::chrono::seconds{10})) {
return;
}
const auto end_time = Common::RealTimeClock::Now();
const u64 tsc_end = FencedRDTSC();
// Calculate differences.
const u64 timer_diff = static_cast<u64>(
std::chrono::duration_cast<std::chrono::nanoseconds>(end_time - start_time).count());
const u64 tsc_diff = tsc_end - tsc_start;
const u64 tsc_freq = MultiplyAndDivide64(tsc_diff, 1000000000ULL, timer_diff);
rtsc_frequency = tsc_freq;
CalculateAndSetFactors();
}};
time_point.inner.last_measure = FencedRDTSC();
time_point.inner.accumulated_ticks = 0U;
ns_rtsc_factor = GetFixedPoint64Factor(NS_RATIO, rtsc_frequency);
us_rtsc_factor = GetFixedPoint64Factor(US_RATIO, rtsc_frequency);
ms_rtsc_factor = GetFixedPoint64Factor(MS_RATIO, rtsc_frequency);
clock_rtsc_factor = GetFixedPoint64Factor(emulated_clock_frequency, rtsc_frequency);
cpu_rtsc_factor = GetFixedPoint64Factor(emulated_cpu_frequency, rtsc_frequency);
CalculateAndSetFactors();
}
u64 NativeClock::GetRTSC() {
@ -138,6 +154,14 @@ u64 NativeClock::GetCPUCycles() {
return MultiplyHigh(rtsc_value, cpu_rtsc_factor);
}
void NativeClock::CalculateAndSetFactors() {
ns_rtsc_factor = GetFixedPoint64Factor(NS_RATIO, rtsc_frequency);
us_rtsc_factor = GetFixedPoint64Factor(US_RATIO, rtsc_frequency);
ms_rtsc_factor = GetFixedPoint64Factor(MS_RATIO, rtsc_frequency);
clock_rtsc_factor = GetFixedPoint64Factor(emulated_clock_frequency, rtsc_frequency);
cpu_rtsc_factor = GetFixedPoint64Factor(emulated_cpu_frequency, rtsc_frequency);
}
} // namespace X64
} // namespace Common

5
src/common/x64/native_clock.h
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@ -3,6 +3,7 @@
#pragma once
#include "common/polyfill_thread.h"
#include "common/wall_clock.h"
namespace Common {
@ -28,6 +29,8 @@ public:
private:
u64 GetRTSC();
void CalculateAndSetFactors();
union alignas(16) TimePoint {
TimePoint() : pack{} {}
u128 pack{};
@ -47,6 +50,8 @@ private:
u64 ms_rtsc_factor{};
u64 rtsc_frequency;
std::jthread time_sync_thread;
};
} // namespace X64

2
src/core/core_timing.cpp
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@ -53,7 +53,7 @@ void CoreTiming::ThreadEntry(CoreTiming& instance) {
static constexpr char name[] = "HostTiming";
MicroProfileOnThreadCreate(name);
Common::SetCurrentThreadName(name);
Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
instance.on_thread_init();
instance.ThreadLoop();
MicroProfileOnThreadExit();

2
src/core/cpu_manager.cpp
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@ -192,7 +192,7 @@ void CpuManager::RunThread(std::stop_token token, std::size_t core) {
}
MicroProfileOnThreadCreate(name.c_str());
Common::SetCurrentThreadName(name.c_str());
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
auto& data = core_data[core];
data.host_context = Common::Fiber::ThreadToFiber();

2
src/core/hle/service/hid/controllers/stubbed.cpp
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@ -26,7 +26,7 @@ void Controller_Stubbed::OnUpdate(const Core::Timing::CoreTiming& core_timing) {
}
CommonHeader header{};
header.timestamp = core_timing.GetCPUTicks();
header.timestamp = core_timing.GetGlobalTimeNs().count();
header.total_entry_count = 17;
header.entry_count = 0;
header.last_entry_index = 0;

8
src/core/hle/service/hid/controllers/touchscreen.cpp
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@ -32,7 +32,7 @@ void Controller_Touchscreen::OnInit() {}
void Controller_Touchscreen::OnRelease() {}
void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timing) {
shared_memory->touch_screen_lifo.timestamp = core_timing.GetCPUTicks();
shared_memory->touch_screen_lifo.timestamp = core_timing.GetGlobalTimeNs().count();
if (!IsControllerActivated()) {
shared_memory->touch_screen_lifo.buffer_count = 0;
@ -85,7 +85,7 @@ void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timin
const auto active_fingers_count =
static_cast<std::size_t>(std::distance(active_fingers.begin(), end_iter));
const u64 tick = core_timing.GetCPUTicks();
const u64 timestamp = static_cast<u64>(core_timing.GetGlobalTimeNs().count());
const auto& last_entry = shared_memory->touch_screen_lifo.ReadCurrentEntry().state;
next_state.sampling_number = last_entry.sampling_number + 1;
@ -102,8 +102,8 @@ void Controller_Touchscreen::OnUpdate(const Core::Timing::CoreTiming& core_timin
touch_entry.diameter_x = Settings::values.touchscreen.diameter_x;
touch_entry.diameter_y = Settings::values.touchscreen.diameter_y;
touch_entry.rotation_angle = Settings::values.touchscreen.rotation_angle;
touch_entry.delta_time = tick - active_fingers[id].last_touch;
fingers[active_fingers[id].id].last_touch = tick;
touch_entry.delta_time = timestamp - active_fingers[id].last_touch;
fingers[active_fingers[id].id].last_touch = timestamp;
touch_entry.finger = active_fingers[id].id;
touch_entry.attribute.raw = active_fingers[id].attribute.raw;
} else {

4
src/core/perf_stats.cpp
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@ -126,8 +126,8 @@ double PerfStats::GetLastFrameTimeScale() const {
}
void SpeedLimiter::DoSpeedLimiting(microseconds current_system_time_us) {
if (!Settings::values.use_speed_limit.GetValue() ||
Settings::values.use_multi_core.GetValue()) {
if (Settings::values.use_multi_core.GetValue() ||
!Settings::values.use_speed_limit.GetValue()) {
return;
}

2
src/video_core/gpu_thread.cpp
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@ -25,7 +25,7 @@ static void RunThread(std::stop_token stop_token, Core::System& system,
SCOPE_EXIT({ MicroProfileOnThreadExit(); });
Common::SetCurrentThreadName(name.c_str());
Common::SetCurrentThreadPriority(Common::ThreadPriority::High);
Common::SetCurrentThreadPriority(Common::ThreadPriority::Critical);
system.RegisterHostThread();
auto current_context = context.Acquire();