Issue #20505: BaseEventLoop uses again the resolution of the clock to decide if
scheduled tasks should be executed or not.
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@ -96,6 +96,7 @@ class BaseEventLoop(events.AbstractEventLoop):
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self._default_executor = None
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self._internal_fds = 0
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self._running = False
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self._clock_resolution = time.get_clock_info('monotonic').resolution
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def _make_socket_transport(self, sock, protocol, waiter=None, *,
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extra=None, server=None):
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@ -643,10 +644,10 @@ class BaseEventLoop(events.AbstractEventLoop):
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self._process_events(event_list)
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# Handle 'later' callbacks that are ready.
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now = self.time()
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end_time = self.time() + self._clock_resolution
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while self._scheduled:
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handle = self._scheduled[0]
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if handle._when > now:
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if handle._when >= end_time:
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break
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handle = heapq.heappop(self._scheduled)
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self._ready.append(handle)
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@ -1178,15 +1178,15 @@ class EventLoopTestsMixin:
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yield from asyncio.sleep(1e-4, loop=loop)
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yield from asyncio.sleep(1e-6, loop=loop)
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yield from asyncio.sleep(1e-8, loop=loop)
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yield from asyncio.sleep(1e-10, loop=loop)
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self.loop.run_until_complete(wait())
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# The ideal number of call is 10, but on some platforms, the selector
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# The ideal number of call is 12, but on some platforms, the selector
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# may sleep at little bit less than timeout depending on the resolution
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# of the clock used by the kernel. Tolerate 5 useless calls on these
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# platforms.
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self.assertLessEqual(self.loop._run_once_counter, 15,
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{'time_info': time.get_clock_info('time'),
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'monotonic_info': time.get_clock_info('monotonic'),
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# of the clock used by the kernel. Tolerate a few useless calls on
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# these platforms.
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self.assertLessEqual(self.loop._run_once_counter, 20,
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{'clock_resolution': self.loop._clock_resolution,
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'selector': self.loop._selector.__class__.__name__})
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