[issue20311] epoll.poll(timeout) and PollSelector.select(timeout) must round the timeout to the upper bound

[STINNER Victor]

STINNER Victor added the comment:

> So, to sum up:
> - you write a fragile and unelegant patch without a good reason
> - you commit it without review
> - you're asked several times to provide an example of the problems your patch is supposed to solve, but don't give any
> - you don't take into account the fact that all proven and successful event loops work just fine without a similar patch
> - you insist, and won't neither back your claims by examples, nor revert your patch

My goal is to ensure that each call to asyncio.BaseEventLoop._run_once() executes at least an handle. It is now described as a unit test in Lib/test/test_asyncio/test_events.py: test_timeout_rounding(). There is one exception: I don't care if the selector was interrupted by a signal. (As I wrote, it's not interesting to loop on the selector, it's fine to re-execute the whole _run_once() method.)

If I understood correctly your opinion, you don't want to reach this exact goal, and you would prefer to keep the code simpler. So you don't care if sometimes _run_once() exit without executing any task. Did I understand correctly your opinion?

But I don't understand if you would prefer to revert all my changes, or keep the rounding away from zero in selectors?

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<http://bugs.python.org/issue20311>
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