Sorry, I have to reopen this topic again, a buildbot failed :-( Builds 10136, 10134 and 10131 failed on "failure x86 XP-4 3.x" buildbot. It's sporadic probably because the test fails sometimes depending how the timing is rounded.

http://buildbot.python.org/all/builders/x86%20XP-4%203.x/builds/10136/steps/test/logs/stdio

======================================================================
FAIL: test_timeout_rounding (test.test_asyncio.test_events.SelectEventLoopTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\test_asyncio\test_events.py", line 1185, in test_timeout_rounding
    self.assertLessEqual(self.loop._run_once_counter, 8)
AssertionError: 114 not less than or equal to 8

http://buildbot.python.org/all/builders/x86%20XP-4%203.x/builds/10134/steps/test/logs/stdio

======================================================================
FAIL: test_timeout_rounding (test.test_asyncio.test_events.SelectEventLoopTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\test_asyncio\test_events.py", line 1185, in test_timeout_rounding
    self.assertLessEqual(self.loop._run_once_counter, 8)
AssertionError: 181 not less than or equal to 8

http://buildbot.python.org/all/builders/x86%20XP-4%203.x/builds/10131/steps/test/logs/stdio

======================================================================
FAIL: test_timeout_rounding (test.test_asyncio.test_events.SelectEventLoopTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\cygwin\home\db3l\buildarea\3.x.bolen-windows\build\lib\test\test_asyncio\test_events.py", line 1185, in test_timeout_rounding
    self.assertLessEqual(self.loop._run_once_counter, 8)
AssertionError: 158 not less than or equal to 8