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Use clock_gettime() in pytime.c #66483

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vstinner opened this issue Aug 27, 2014 · 2 comments
Closed

Use clock_gettime() in pytime.c #66483

vstinner opened this issue Aug 27, 2014 · 2 comments

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@vstinner
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BPO 22287
Nosy @loewis, @vstinner
Files
  • clock_gettime.patch
    		•

    Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

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    GitHub fields:

    assignee = None
closed_at = <Date 2014-08-29.13:43:07.139>
created_at = <Date 2014-08-27.10:51:55.235>
labels = []
title = 'Use clock_gettime() in pytime.c'
updated_at = <Date 2014-08-29.13:43:07.138>
user = 'https://github.com/vstinner'

    bugs.python.org fields:

    activity = <Date 2014-08-29.13:43:07.138>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2014-08-29.13:43:07.139>
closer = 'vstinner'
components = []
creation = <Date 2014-08-27.10:51:55.235>
creator = 'vstinner'
dependencies = []
files = ['36485']
hgrepos = []
issue_num = 22287
keywords = ['patch']
message_count = 2.0
messages = ['225967', '226062']
nosy_count = 4.0
nosy_names = ['loewis', 'vstinner', 'neologix', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue22287'
versions = ['Python 3.5']
    @vstinner
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    On UNIX, time.time() currently uses clock_gettime(), but _PyTime_gettimeofday() doesn't becauce pytime.c lacks a dependency on the librt module (needed on some platforms).

    Attached patch adds the dependency if needed and modify _PyTime_gettimeofday() to use clock_gettime() if available.

    The patch alone is not very useful. I wrote it to prepare the work for the issue bpo-22043 (use a monotonic clock in Python modules written in C).

    With the patch, Python depends on the librt on Solaris and on Linux with glibc older than 2.17 (clock_gettime is now available directly in the libc since glibc 2.17).

    @python-dev
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    Mannequin

    python-dev mannequin commented Aug 29, 2014

    New changeset 8e13ad4e5ae6 by Victor Stinner in branch 'default':
    Issue bpo-22287: On UNIX, _PyTime_gettimeofday() now uses
    http://hg.python.org/cpython/rev/8e13ad4e5ae6

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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    @vstinner