statsd: run at 2Hz (#23493)

selfdrive/statsd.py

@@ -73,6 +73,11 @@ def main():
 
   last_flush_time = time.monotonic()
   gauges = {}
+  while True:
+    started_prev = sm['deviceState'].started
+    sm.update()
+
+    # Update metrics
     while True:
       try:
         metric = sock.recv_string(zmq.NOBLOCK)
@@ -88,10 +93,7 @@ def main():
         except Exception:
           cloudlog.event("malformed metric", metric=metric)
       except zmq.error.Again:
-      time.sleep(1e-3)
-
-    started_prev = sm['deviceState'].started
-    sm.update(0)
+        break
 
     # flush when started state changes or after FLUSH_TIME_S
     if (time.monotonic() > last_flush_time + STATS_FLUSH_TIME_S) or (sm['deviceState'].started != started_prev):