[metrics-bugs] #34257 [Metrics/Onionperf]: Analyze unusual distribution of time to extend to first hop in circuit

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#34257: Analyze unusual distribution of time to extend to first hop in circuit
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 Reporter:  karsten            |          Owner:  metrics-team
     Type:  defect             |         Status:  new
 Priority:  Medium             |      Milestone:
Component:  Metrics/Onionperf  |        Version:
 Severity:  Normal             |     Resolution:
 Keywords:                     |  Actual Points:
Parent ID:                     |         Points:
 Reviewer:                     |        Sponsor:  Sponsor59-must
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Comment (by karsten):

 Here's an updated graph with the testing instance in another Hong Kong
 data center (labelled as ip-172-31-5-27):

 [[Image(onionperf-circuit-extend-2020-05-25.png, 700px)]]

 The updated CSV file is attached, and the logs and OnionPerf analysis
 files can be found in [https://people.torproject.org:~/karsten/op-hk-ec2
 -onionperf-data.tar.xz this tarball] (114M).

 This distribution of build times to the first relay looks unusual to me,
 too.

 Should I keep this new instance running? Right now it costs ~3 USD per
 day, so I'm happy to keep it running if we hope to learn something new
 from more data. But if we have enough data, I'll stop it for now. We can
 always set up a new instance to collect more or different data.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/34257#comment:5>
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