Created on 2012-01-24 00:22 by haypo, last changed 2012-02-23 23:11 by haypo. This issue is now closed.
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| File name | Uploaded | Description | Edit | |
| monotonic.patch | haypo, 2012-01-24 00:22 | review | ||
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| msg151868 - (view) | Author: STINNER Victor (haypo) *  |
Date: 2012-01-24 00:22 | |
After time.wallclock() (issue #10278), let add a time.monotomic() function. It is similar to time.wallclock() (try to get the most accurate clock) but is not available if the system doesn't provide a monotonic clock. It may also fail at runtime if Python cannot find a monotonic clock, whereas time.clock() and time.wallclock() fallback on a wallclock which may go backward on NTP adjust. The documentation of the patch should be improved :-) wallclock() tests may be simplified or dropped because they may fail on NTP adjust. |
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| msg152138 - (view) | Author: Terry J. Reedy (terry.reedy) * |
Date: 2012-01-27 23:16 | |
Do we actually yet another function, or could this be covered by adding a parameter such as monotonic=False, perhaps to wallclock(). |
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| msg152280 - (view) | Author: STINNER Victor (haypo) * |
Date: 2012-01-29 23:09 | |
> Do we actually yet another function, or could this be covered by adding a parameter such as monotonic=False, perhaps to wallclock(). A monotonic is a different clock, it would be surprising that an argument uses another clock. |
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| msg152505 - (view) | Author: Éric Araujo (merwok) * |
Date: 2012-02-03 13:40 | |
I don’t understand why this new function would be useful. Time-related modules in Python are already complicated. |
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| msg152506 - (view) | Author: R. David Murray (r.david.murray) * |
Date: 2012-02-03 13:46 | |
If you are trying to time something (an interval), having the time go backward can really screw up your data. And that *will* happen on a system that is running NTP (or even just resets its time). monotonic clocks were introduced at the OS level for a reason, and it seems reasonable for Python to expose them (when the are available) like it does other system resources. |
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| msg152514 - (view) | Author: Éric Araujo (merwok) * |
Date: 2012-02-03 14:12 | |
Thanks, now I see the usefulness. |
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| msg152816 - (view) | Author: Roundup Robot (python-dev) | Date: 2012-02-07 22:29 | |
New changeset 376ce937823c by Victor Stinner in branch 'default': Issue #13846: Add time.monotonic(), monotonic clock. http://hg.python.org/cpython/rev/376ce937823c |
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| msg152860 - (view) | Author: Éric Araujo (merwok) * |
Date: 2012-02-08 14:25 | |
Victor, I think the doc doesn’t say why the function is useful for people like me who don’t already know it. David’s explanation could be reused. |
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| msg153774 - (view) | Author: Antoine Pitrou (pitrou) * |
Date: 2012-02-20 10:43 | |
Boost has a monotonic time implementation (steady_clock) for OS X: http://svn.boost.org/svn/boost/trunk/boost/chrono/detail/inlined/mac/chrono.hpp |
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| msg154096 - (view) | Author: Roundup Robot (python-dev) | Date: 2012-02-23 23:10 | |
New changeset 50b1f2d07011 by Victor Stinner in branch 'default': Issue #13846: Enhance time.monotonic() documentation http://hg.python.org/cpython/rev/50b1f2d07011 |
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| msg154097 - (view) | Author: STINNER Victor (haypo) * |
Date: 2012-02-23 23:11 | |
> Boost has a monotonic time implementation (steady_clock) for OS X I opened a new issue for Mac OS X: #14104. -- @Éric: I enhanced the doc. Feel free to complete or rewrite it if you have better information about such clocks. |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2012-02-23 23:11:18 | haypo | set | messages: + msg154097 |
| 2012-02-23 23:10:17 | python-dev | set | messages: + msg154096 |
| 2012-02-20 10:43:23 | pitrou | set | nosy:
+ pitrou, ned.deily messages: + msg153774 |
| 2012-02-08 14:25:30 | merwok | set | messages: + msg152860 |
| 2012-02-07 22:30:30 | haypo | set | status: open -> closed resolution: fixed |
| 2012-02-07 22:29:16 | python-dev | set | nosy:
+ python-dev messages: + msg152816 |
| 2012-02-03 14:12:30 | merwok | set | messages: + msg152514 |
| 2012-02-03 13:46:44 | r.david.murray | set | nosy:
+ r.david.murray messages: + msg152506 |
| 2012-02-03 13:40:05 | merwok | set | nosy:
+ merwok messages: + msg152505 |
| 2012-01-29 23:09:39 | haypo | set | messages: + msg152280 |
| 2012-01-27 23:16:34 | terry.reedy | set | nosy:
+ terry.reedy messages: + msg152138 type: enhancement stage: patch review |
| 2012-01-24 21:39:03 | giampaolo.rodola | set | nosy:
+ giampaolo.rodola |
| 2012-01-24 04:11:58 | rosslagerwall | set | nosy:
+ rosslagerwall |
| 2012-01-24 00:22:29 | haypo | create | |