mirror of https://github.com/yuzu-emu/yuzu.git
104 lines
3.4 KiB
C++
104 lines
3.4 KiB
C++
// SPDX-FileCopyrightText: 2017 Citra Emulator Project
|
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
|
|
#pragma once
|
|
|
|
#include <array>
|
|
#include <atomic>
|
|
#include <chrono>
|
|
#include <cstddef>
|
|
#include <mutex>
|
|
#include "common/common_types.h"
|
|
|
|
namespace Core {
|
|
|
|
struct PerfStatsResults {
|
|
/// System FPS (LCD VBlanks) in Hz
|
|
double system_fps;
|
|
/// Average game FPS (GPU frame renders) in Hz
|
|
double average_game_fps;
|
|
/// Walltime per system frame, in seconds, excluding any waits
|
|
double frametime;
|
|
/// Ratio of walltime / emulated time elapsed
|
|
double emulation_speed;
|
|
};
|
|
|
|
/**
|
|
* Class to manage and query performance/timing statistics. All public functions of this class are
|
|
* thread-safe unless stated otherwise.
|
|
*/
|
|
class PerfStats {
|
|
public:
|
|
explicit PerfStats(u64 title_id_);
|
|
~PerfStats();
|
|
|
|
using Clock = std::chrono::steady_clock;
|
|
|
|
void BeginSystemFrame();
|
|
void EndSystemFrame();
|
|
void EndGameFrame();
|
|
|
|
PerfStatsResults GetAndResetStats(std::chrono::microseconds current_system_time_us);
|
|
|
|
/**
|
|
* Returns the arithmetic mean of all frametime values stored in the performance history.
|
|
*/
|
|
double GetMeanFrametime() const;
|
|
|
|
/**
|
|
* Gets the ratio between walltime and the emulated time of the previous system frame. This is
|
|
* useful for scaling inputs or outputs moving between the two time domains.
|
|
*/
|
|
double GetLastFrameTimeScale() const;
|
|
|
|
private:
|
|
mutable std::mutex object_mutex;
|
|
|
|
/// Title ID for the game that is running. 0 if there is no game running yet
|
|
u64 title_id{0};
|
|
/// Current index for writing to the perf_history array
|
|
std::size_t current_index{0};
|
|
/// Stores an hour of historical frametime data useful for processing and tracking performance
|
|
/// regressions with code changes.
|
|
std::array<double, 216000> perf_history{};
|
|
|
|
/// Point when the cumulative counters were reset
|
|
Clock::time_point reset_point = Clock::now();
|
|
/// System time when the cumulative counters were reset
|
|
std::chrono::microseconds reset_point_system_us{0};
|
|
|
|
/// Cumulative duration (excluding v-sync/frame-limiting) of frames since last reset
|
|
Clock::duration accumulated_frametime = Clock::duration::zero();
|
|
/// Cumulative number of system frames (LCD VBlanks) presented since last reset
|
|
u32 system_frames = 0;
|
|
/// Cumulative number of game frames (GSP frame submissions) since last reset
|
|
std::atomic<u32> game_frames = 0;
|
|
|
|
/// Point when the previous system frame ended
|
|
Clock::time_point previous_frame_end = reset_point;
|
|
/// Point when the current system frame began
|
|
Clock::time_point frame_begin = reset_point;
|
|
/// Total visible duration (including frame-limiting, etc.) of the previous system frame
|
|
Clock::duration previous_frame_length = Clock::duration::zero();
|
|
/// Previously computed fps
|
|
double previous_fps = 0;
|
|
};
|
|
|
|
class SpeedLimiter {
|
|
public:
|
|
using Clock = std::chrono::steady_clock;
|
|
|
|
void DoSpeedLimiting(std::chrono::microseconds current_system_time_us);
|
|
|
|
private:
|
|
/// Emulated system time (in microseconds) at the last limiter invocation
|
|
std::chrono::microseconds previous_system_time_us{0};
|
|
/// Walltime at the last limiter invocation
|
|
Clock::time_point previous_walltime = Clock::now();
|
|
|
|
/// Accumulated difference between walltime and emulated time
|
|
std::chrono::microseconds speed_limiting_delta_err{0};
|
|
};
|
|
|
|
} // namespace Core
|