Understanding time

Loïc Hoguin essen@REDACTED
Tue Sep 7 08:56:14 CEST 2021

It is not strictly monotonic, see the note: 

Also see this if you need ordered events:


On 07/09/2021 08:27, Frank Muller wrote:
> Hi Everyone
> Yesterday, a Java developer told me that getting unique timestamps is 
> only guaranteed to be possible between COREs on the same CPU. Stated 
> otherwise, two processes on two different CPUs could get the same timestamp.
> I’m now wondering if calls to “erlang:system_time/1” are strictly 
> monotonic 
> (https://erlang.org/doc/apps/erts/time_correction.html#strictly-monotonically-increasing) 
> between Erlang processes on the same scheduler, and even between Erlang 
> processes on different schedulers.
> Can anyone clarify please?
> /Frank

Loïc Hoguin

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