105 lines
3.3 KiB
Python
105 lines
3.3 KiB
Python
import time
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import psutil
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import threading
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class PerformanceMonitor:
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def __init__(self):
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self._start_time = None
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self._last_frame_time = 0.0
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self._fps = 0.0
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self._frame_count = 0
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self._fps_last_time = time.time()
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self._process = psutil.Process()
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self._cpu_usage = 0.0
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self._cpu_lock = threading.Lock()
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# Input lag tracking
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self._last_input_time = None
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self._input_lag_ms = 0.0
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# Alerts
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self.alert_callback = None
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self.thresholds = {
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'frame_time_ms': 33.3, # < 30 FPS
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'cpu_percent': 80.0,
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'input_lag_ms': 100.0
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}
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self._last_alert_time = 0
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self._alert_cooldown = 30 # seconds
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# Start CPU usage monitoring thread
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self._stop_event = threading.Event()
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self._cpu_thread = threading.Thread(target=self._monitor_cpu, daemon=True)
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self._cpu_thread.start()
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def _monitor_cpu(self):
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while not self._stop_event.is_set():
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# psutil.cpu_percent is better than process.cpu_percent for real-time
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usage = self._process.cpu_percent(interval=1.0)
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with self._cpu_lock:
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self._cpu_usage = usage
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time.sleep(0.1)
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def start_frame(self):
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self._start_time = time.time()
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def record_input_event(self):
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self._last_input_time = time.time()
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def end_frame(self):
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if self._start_time is None:
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return
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end_time = time.time()
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self._last_frame_time = (end_time - self._start_time) * 1000.0
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self._frame_count += 1
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# Calculate input lag if an input occurred during this frame
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if self._last_input_time is not None:
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self._input_lag_ms = (end_time - self._last_input_time) * 1000.0
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self._last_input_time = None
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self._check_alerts()
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elapsed_since_fps = end_time - self._fps_last_time
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if elapsed_since_fps >= 1.0:
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self._fps = self._frame_count / elapsed_since_fps
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self._frame_count = 0
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self._fps_last_time = end_time
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def _check_alerts(self):
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if not self.alert_callback:
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return
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now = time.time()
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if now - self._last_alert_time < self._alert_cooldown:
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return
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metrics = self.get_metrics()
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alerts = []
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if metrics['last_frame_time_ms'] > self.thresholds['frame_time_ms']:
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alerts.append(f"Frame time high: {metrics['last_frame_time_ms']:.1f}ms")
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if metrics['cpu_percent'] > self.thresholds['cpu_percent']:
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alerts.append(f"CPU usage high: {metrics['cpu_percent']:.1f}%")
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if metrics['input_lag_ms'] > self.thresholds['input_lag_ms']:
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alerts.append(f"Input lag high: {metrics['input_lag_ms']:.1f}ms")
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if alerts:
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self._last_alert_time = now
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self.alert_callback("; ".join(alerts))
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def get_metrics(self):
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with self._cpu_lock:
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cpu_usage = self._cpu_usage
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return {
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'last_frame_time_ms': self._last_frame_time,
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'fps': self._fps,
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'cpu_percent': cpu_usage,
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'input_lag_ms': self._input_lag_ms
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}
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def stop(self):
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self._stop_event.set()
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self._cpu_thread.join(timeout=2.0)
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