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Title: Use monotonic time for sched, trace and subprocess modules
Type: Stage: resolved
Components: Versions:
process
Status: closed Resolution: fixed
Dependencies: Superseder:
Assigned To: Nosy List: belopolsky, giampaolo.rodola, neologix, python-dev, rhettinger, vstinner
Priority: normal Keywords: patch

Created on 2012年04月29日 01:18 by vstinner, last changed 2022年04月11日 14:57 by admin. This issue is now closed.

Files
File name Uploaded Description Edit
use_monotonic.patch vstinner, 2012年04月29日 01:18 review
Messages (3)
msg159559 - (view) Author: STINNER Victor (vstinner) * (Python committer) Date: 2012年04月29日 01:18
The PEP 418 added a new time.monotonic() function. The sched, trace and subprocess modules should use it, if available, to avoid issues when the system time is changed.
Attached patch uses the time.monotonic() function when available.
See also the issue #14222 (same issue for queue and threading) and the PEP 418.
--
socket and ssl modules should also use a monotonic clock if available, but these modules are implemented in C. The C implementation of time.monotonic() requires the librt library and is written in the timemodule.c. It requires more work to reuse it in the socket and ssl modules.
msg159592 - (view) Author: Charles-François Natali (neologix) * (Python committer) Date: 2012年04月29日 09:12
LGTM.
Juste one nitpick: why do you sometimes import the clock source as get_time() and others _time()? _time() looks fine to me.
msg161945 - (view) Author: Roundup Robot (python-dev) (Python triager) Date: 2012年05月30日 11:31
New changeset 1345cf58738d by Victor Stinner in branch 'default':
Close #14690: Use monotonic clock instead of system clock in the sched,
http://hg.python.org/cpython/rev/1345cf58738d 
History
Date User Action Args
2022年04月11日 14:57:29adminsetgithub: 58895
2012年05月30日 11:31:52python-devsetstatus: open -> closed

nosy: + python-dev
messages: + msg161945

resolution: fixed
stage: resolved
2012年04月29日 09:12:01neologixsetmessages: + msg159592
2012年04月29日 01:27:20vstinnersetnosy: + belopolsky
2012年04月29日 01:22:46pitrousetnosy: + giampaolo.rodola
2012年04月29日 01:18:53vstinnercreate

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