[metrics-bugs] #34024 [Metrics/Onionperf]: Reduce timeout and stallout values

[Tor Bug Tracker & Wiki]

#34024: Reduce timeout and stallout values
---------------------------------------+--------------------------------
 Reporter:  karsten                    |          Owner:  metrics-team
     Type:  enhancement                |         Status:  needs_review
 Priority:  Medium                     |      Milestone:
Component:  Metrics/Onionperf          |        Version:
 Severity:  Normal                     |     Resolution:
 Keywords:  metrics-team-roadmap-2020  |  Actual Points:
Parent ID:                             |         Points:  1
 Reviewer:                             |        Sponsor:  Sponsor59-must
---------------------------------------+--------------------------------
Changes (by karsten):

 * status:  new => needs_review


Comment:

 I looked at measurements made by op-hk2, op-nl2, and op-us2 in the first
 half of May 2020. I wanted to get an idea how many of the 5 MiB
 measurements would have timed out with a timeout of 270 rather than 3600
 seconds. The result was: ''zero''. For comparison, there have been 1,027
 successful 5 MiB measurements in that time, and the slowest four have
 finished in 201 seconds, 186 seconds, 142 seconds, and 128 seconds. And
 while it's conceivable that we would find a non-zero number in other half
 months of measurements, their number will very likely be really small.

 Similar to #34023, let's discuss how to proceed here. My recommendation is
 that we:

  1. use a timeout of 270 seconds for all measurements to avoid overlapping
 measurements and

  2. set the stallout value to 0 to disable the stallout function in TGen.

 More on Thursday at the weekly meeting.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/34024#comment:6>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online