[Python-Dev] PEP 418: Add monotonic clock (original) (raw)

Victor Stinner victor.stinner at gmail.com
Tue Mar 27 19:55:16 CEST 2012

The clock does jump forward when the system suspends.  At least some existing implementations of steadyclock in C++ already have this problem, and I think they all might. .... Time with respect to power management state changes is something that the PEP should address fully, for each platform.

I don't think that Python should workaround OS issues, but document them correctly. I started with this sentence for time.monotonic():

"The monotonic clock may stop while the system is suspended."

I don't know exactly how clocks behave with system suspend. Tell me if you have more information.

 (<https://developer.apple.com/library/mac/#qa/qa1340/index.html>, <http://msdn.microsoft.com/en-us/library/aa394362.aspx>, <http://upower.freedesktop.org/docs/UPower.html#UPower::Sleeping>).

I will read these links and maybe add them to the PEP.

Victor

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