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fix: 前端时钟校准问题

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This commit is contained in:
Mock
2026-04-18 17:01:10 +08:00
parent f49582536b
commit 9c0e879aec
6 changed files with 235 additions and 4 deletions
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73
backend/monitoring/video.py
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@@ -51,7 +51,13 @@ class VideoDisplayProbeStore:
request_to_paint_ms=None,
response_to_paint_ms=None,
backend_to_request_ms=None,
backend_to_request_ms_raw=None,
backend_to_paint_ms=None,
backend_to_paint_ms_raw=None,
browser_backend_clock_offset_ms=None,
browser_backend_clock_rtt_ms=None,
browser_backend_clock_sample_count=0,
browser_backend_clock_calibrated_at=None,
)
def record_event(self, payload: dict[str, Any]) -> None:
@@ -59,6 +65,10 @@ class VideoDisplayProbeStore:
request_started_unix_ms = payload.get("request_started_unix_ms")
response_received_unix_ms = payload.get("response_received_unix_ms")
paint_unix_ms = payload.get("paint_unix_ms")
browser_backend_clock_offset_ms = self._coerce_float(payload.get("browser_backend_clock_offset_ms"))
browser_backend_clock_rtt_ms = self._coerce_float(payload.get("browser_backend_clock_rtt_ms"))
browser_backend_clock_sample_count = self._coerce_int(payload.get("browser_backend_clock_sample_count"))
browser_backend_clock_calibrated_at = self._coerce_text(payload.get("browser_backend_clock_calibrated_at"))
request_to_paint_ms = self._duration_ms(paint_unix_ms, request_started_unix_ms, clamp_floor_zero=True)
response_to_paint_ms = self._duration_ms(paint_unix_ms, response_received_unix_ms, clamp_floor_zero=True)
backend_received_unix_ms = None
@@ -67,11 +77,24 @@ class VideoDisplayProbeStore:
backend_received_unix_ms = int(backend_received_unix_ns) / 1_000_000.0
except (TypeError, ValueError):
backend_received_unix_ms = None
backend_to_request_ms = self._duration_ms(request_started_unix_ms, backend_received_unix_ms, clamp_floor_zero=False)
backend_received_browser_unix_ms = None
if backend_received_unix_ms is not None and browser_backend_clock_offset_ms is not None:
backend_received_browser_unix_ms = round(backend_received_unix_ms + browser_backend_clock_offset_ms, 3)
backend_to_request_ms_raw = self._duration_ms(request_started_unix_ms, backend_received_unix_ms, clamp_floor_zero=False)
backend_to_paint_ms_raw = self._duration_ms(paint_unix_ms, backend_received_unix_ms, clamp_floor_zero=False)
backend_to_request_ms = self._duration_ms(
request_started_unix_ms,
backend_received_browser_unix_ms,
clamp_floor_zero=True,
)
backend_to_paint_ms = self._duration_ms(
paint_unix_ms,
backend_received_browser_unix_ms,
clamp_floor_zero=True,
)
status = VideoDisplayProbeStatus(
updated_at=str(payload.get("updated_at") or ""),
updated_at=self._coerce_text(payload.get("updated_at")),
frame_seq=int(payload["frame_seq"]) if payload.get("frame_seq") is not None else None,
frame_hash=str(payload.get("frame_hash") or ""),
input_to_next_fresh_frame_ms=self._coerce_float(payload.get("input_to_next_fresh_frame_ms")),
@@ -80,11 +103,29 @@ class VideoDisplayProbeStore:
request_to_paint_ms=request_to_paint_ms,
response_to_paint_ms=response_to_paint_ms,
backend_to_request_ms=backend_to_request_ms,
backend_to_request_ms_raw=backend_to_request_ms_raw,
backend_to_paint_ms=backend_to_paint_ms,
backend_to_paint_ms_raw=backend_to_paint_ms_raw,
browser_backend_clock_offset_ms=browser_backend_clock_offset_ms,
browser_backend_clock_rtt_ms=browser_backend_clock_rtt_ms,
browser_backend_clock_sample_count=browser_backend_clock_sample_count,
browser_backend_clock_calibrated_at=browser_backend_clock_calibrated_at,
)
logged_payload = dict(payload)
logged_payload.update(
{
"request_to_paint_ms": request_to_paint_ms,
"response_to_paint_ms": response_to_paint_ms,
"backend_received_browser_unix_ms": backend_received_browser_unix_ms,
"backend_to_request_ms": backend_to_request_ms,
"backend_to_request_ms_raw": backend_to_request_ms_raw,
"backend_to_paint_ms": backend_to_paint_ms,
"backend_to_paint_ms_raw": backend_to_paint_ms_raw,
}
)
with self._lock:
self._latest = status
self._logger.write(payload)
self._logger.write(logged_payload)
def get_status(self) -> dict[str, Any]:
with self._lock:
@@ -99,7 +140,13 @@ class VideoDisplayProbeStore:
"request_to_paint_ms": latest.request_to_paint_ms,
"response_to_paint_ms": latest.response_to_paint_ms,
"backend_to_request_ms": latest.backend_to_request_ms,
"backend_to_request_ms_raw": latest.backend_to_request_ms_raw,
"backend_to_paint_ms": latest.backend_to_paint_ms,
"backend_to_paint_ms_raw": latest.backend_to_paint_ms_raw,
"browser_backend_clock_offset_ms": latest.browser_backend_clock_offset_ms,
"browser_backend_clock_rtt_ms": latest.browser_backend_clock_rtt_ms,
"browser_backend_clock_sample_count": latest.browser_backend_clock_sample_count,
"browser_backend_clock_calibrated_at": latest.browser_backend_clock_calibrated_at,
}
def close(self) -> None:
@@ -114,6 +161,20 @@ class VideoDisplayProbeStore:
except (TypeError, ValueError):
return None
@staticmethod
def _coerce_int(value: Any) -> int:
try:
if value is None:
return 0
return int(value)
except (TypeError, ValueError):
return 0
@staticmethod
def _coerce_text(value: Any) -> str | None:
text = str(value or "").strip()
return text or None
@classmethod
def _duration_ms(cls, end_ms: Any, start_ms: Any, *, clamp_floor_zero: bool) -> float | None:
end_value = cls._coerce_float(end_ms)
@@ -152,7 +213,13 @@ class VideoDisplayProbeStatus:
request_to_paint_ms: float | None
response_to_paint_ms: float | None
backend_to_request_ms: float | None
backend_to_request_ms_raw: float | None
backend_to_paint_ms: float | None
backend_to_paint_ms_raw: float | None
browser_backend_clock_offset_ms: float | None
browser_backend_clock_rtt_ms: float | None
browser_backend_clock_sample_count: int
browser_backend_clock_calibrated_at: str | None
class OmniSocketVideoReceiver: