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PerformanceTracker: Use SPSCQueue and atomic to eliminate need for a mutex. Clean up some math.

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This commit is contained in:
Jordan Woyak
2025-03-05 03:26:34 -06:00
parent c763961112
commit 46e0952e97
3 changed files with 93 additions and 113 deletions
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38
Source/Core/VideoCommon/PerformanceTracker.h
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@ -3,12 +3,13 @@
#pragma once
#include <atomic>
#include <deque>
#include <fstream>
#include <optional>
#include <shared_mutex>
#include "Common/CommonTypes.h"
#include "Common/SPSCQueue.h"
class PerformanceTracker
{
@ -22,30 +23,30 @@ public:
PerformanceTracker(PerformanceTracker&&) = delete;
PerformanceTracker& operator=(PerformanceTracker&&) = delete;
// Functions for recording performance information
void Reset();
// Calls must come from the same thread.
// UpdateStats is expected to be called regularly to empty the SPSC queue.
void UpdateStats();
void ImPlotPlotLines(const char* label) const;
// May call from any thread, but not concurrently, not that you'd want to..
void Count();
// Functions for reading performance information
// May call from any thread.
DT GetSampleWindow() const;
double GetHzAvg() const;
DT GetDtAvg() const;
DT GetDtStd() const;
DT GetLastRawDt() const;
void ImPlotPlotLines(const char* label) const;
private:
void LogRenderTimeToFile(DT val);
void SetPaused(bool paused);
void HandleRawDt(DT value);
void PushFront(DT value);
void PopBack();
bool m_paused = false;
int m_on_state_changed_handle;
// Name of log file and file stream
@ -54,6 +55,12 @@ private:
// Last time Count() was called
TimePoint m_last_time;
std::atomic<bool> m_is_last_time_sane = false;
// Push'd from Count()
// and Pop'd from UpdateStats()
Common::SPSCQueue<DT, false> m_raw_dts;
std::atomic<DT> m_last_raw_dt = DT::zero();
// Amount of time to sample dt's over (defaults to config)
const std::optional<DT> m_sample_window_duration;
@ -63,12 +70,7 @@ private:
std::deque<DT> m_dt_queue;
// Average rate/time throughout the window
DT m_dt_avg = DT::zero(); // Uses Moving Average
double m_hz_avg = 0.0; // Uses Moving Average + Euler Average
// Used to initialize this on demand instead of on every Count()
mutable std::optional<DT> m_dt_std = std::nullopt;
// Used to enable thread safety with the performance tracker
mutable std::shared_mutex m_mutex;
std::atomic<DT> m_dt_avg = DT::zero(); // Uses Moving Average
std::atomic<double> m_hz_avg = 0.0; // Uses Moving Average + Euler Average
std::atomic<DT> m_dt_std = DT::zero();
};