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Issue #20452: select and selectors round (again) timeout away from zero for

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poll and epoll

Improve also debug info to analyze the issue
This commit is contained in:
Victor Stinner 2014-01-31 12:12:53 +01:00
parent 31f65044a9
commit dcd9740ad2
4 changed files with 26 additions and 26 deletions
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10
Lib/selectors.py
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@ -8,6 +8,7 @@ This module allows high-level and efficient I/O multiplexing, built upon the
from abc import ABCMeta, abstractmethod, abstractproperty
from collections import namedtuple, Mapping
import functools
import math
import select
import sys
@ -369,8 +370,9 @@ if hasattr(select, 'poll'):
elif timeout <= 0:
timeout = 0
else:
# Round towards zero
timeout = int(timeout * 1000)
# poll() has a resolution of 1 millisecond, round away from
# zero to wait *at least* timeout seconds.
timeout = int(math.ceil(timeout * 1e3))
ready = []
try:
fd_event_list = self._poll.poll(timeout)
@ -430,6 +432,10 @@ if hasattr(select, 'epoll'):
timeout = -1
elif timeout <= 0:
timeout = 0
else:
# epoll_wait() has a resolution of 1 millisecond, round away
# from zero to wait *at least* timeout seconds.
timeout = math.ceil(timeout * 1e3) * 1e-3
max_ev = len(self._fd_to_key)
ready = []
try: