fix server keep-alive timer #1955

CHANGES.rst

@@ -23,7 +23,7 @@ Changes
 
 - Make sure cleanup signal is sent if startup signal has been sent #1959
 
--
+- Fixed server keep-alive handler, could cause 100% cpu utilization #1955
 
 -
 

aiohttp/helpers.py

@@ -570,6 +570,10 @@ def strtime(self):
     def loop_time(self):
         return self._loop_time
 
+    @property
+    def interval(self):
+        return self._interval
+
 
 def _weakref_handle(info):
     ref, name = info

aiohttp/web_protocol.py

@@ -369,8 +369,9 @@ def _process_keepalive(self):
 
         # all handlers in idle state
         if len(self._request_handlers) == len(self._waiters):
+            # time_service.loop_time is ceiled to 1.0, so we check 2 intervals
             now = self._time_service.loop_time
-            if now + 1.0 > next:
+            if (now + self._time_service.interval * 2) > next:
                 self.force_close(send_last_heartbeat=True)
                 return