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Diffstat (limited to 'Lib/asyncio/base_events.py')
| -rw-r--r-- | Lib/asyncio/base_events.py | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Lib/asyncio/base_events.py b/Lib/asyncio/base_events.py index cafd10a06e..b9de8c719a 100644 --- a/Lib/asyncio/base_events.py +++ b/Lib/asyncio/base_events.py @@ -634,7 +634,17 @@ class BaseEventLoop(events.AbstractEventLoop): else: logger.log(level, 'poll took %.3f seconds', t1-t0) else: + t0 = self.time() event_list = self._selector.select(timeout) + dt = self.time() - t0 + if timeout and not event_list and dt < timeout: + print("%s.select(%.3f ms) took %.3f ms (granularity=%.3f ms, resolution=%.3f ms)" + % (self._selector.__class__.__name__, + timeout * 1e3, + dt * 1e3, + self._granularity * 1e3, + self._selector.resolution * 1e3), + file=sys.__stderr__) self._process_events(event_list) # Handle 'later' callbacks that are ready. |