[tor-bugs] #13802 [Tor]: Add instrumentation to tor

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#13802: Add instrumentation to tor
-------------------------------------------------+-------------------------
 Reporter:  dgoulet                              |          Owner:  dgoulet
     Type:  enhancement                          |         Status:
 Priority:  Medium                               |  assigned
Component:  Tor                                  |      Milestone:  Tor:
 Severity:  Normal                               |  0.2.8.x-final
 Keywords:  201511-deferred, TorCoreTeam201601,  |        Version:
  201512-deferred                                |     Resolution:
Parent ID:  #13792                               |  Actual Points:
  Sponsor:  SponsorR                             |         Points:  medium
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Comment (by dgoulet):

 Status update:

 I'm working with Rob (through #17598) on adding bunch of instrumentation
 points and a shadow component to hook on those so Rob can conduct KIST
 experiment (with and without shadow).

 The goal is to submit the instrumentation and a tracing framework with
 some meat around the bone so we can directly start using it once merged
 and other developers have a concrete example on how to add more in the
 future.

 To look at the work or follow it, see branch `ticket13802_028_01` which is
 still in heavy development (needs cleanup) but at least can give an idea
 of the direction and structure of things.

 Depending on Rob's time to test and review, optimistic ETA is by the end
 of the month.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13802#comment:21>
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