STINNER Victor <victor.stin...@haypocalc.com> added the comment:
I wrote the assertion while dump_tracebacks_later() was implemented using
SIGALRM + alarm(timeout). A simple fix for this issue is just to remove the
assertion. But... I'm curious, and I would like to understand.
The problem is on the following code:
timeout = 0.5
pause = timeout * 2.5
# on Windows XP, b-a gives 1.249931 after sleep(1.25)
min_pause = pause * 0.9
a = time.time()
time.sleep(pause)
b = time.time()
faulthandler.cancel_dump_tracebacks_later()
# Check that sleep() was not interrupted
assert (b - a) >= min_pause, "{{}} < {{}}".format(b - a, min_pause)
So time.sleep(1.25) gives a time delta of 0.998 or 0.970 seconds. Hum, this
value is close to 1.0 seconds, but not to 1.25 seconds.
I see different reasons why the assertion may fail:
* sleep() was really interrupted (by faulthandler thread writing the
tracebacks?)
* time.time() and/or sleep() are not accurate on Windows XP
----------
nosy: +belopolsky
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue11765>
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