[tor-bugs] #28423 [Core Tor/Tor]: improve precision of finegrained periodic event scheduling?

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#28423: improve precision of finegrained periodic event scheduling?
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     Reporter:  nickm         |      Owner:  nickm
         Type:  defect        |     Status:  assigned
     Priority:  Medium        |  Milestone:  Tor: 0.4.0.x-final
    Component:  Core Tor/Tor  |    Version:
     Severity:  Normal        |   Keywords:
Actual Points:                |  Parent ID:  #28335
       Points:                |   Reviewer:
      Sponsor:  Sponsor8      |
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 The periodic.c events are scheduled with respect to the current time, via
 event_add() with a timeout.  But libevent's periodic events are scheduled
 with respect to their last planned time, to prevent drift.

 With the parent branch, I'm changing second_elapsed_callback() to just be
 a regular periodic event.  Will the change in scheduling mechanism break
 anything?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28423>
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