[metrics-bugs] #25774 [Metrics/Ideas]: Record latency measurements using OnionPerf

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#25774: Record latency measurements using OnionPerf
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 Reporter:  irl            |          Owner:  metrics-team
     Type:  project        |         Status:  needs_review
 Priority:  Medium         |      Milestone:
Component:  Metrics/Ideas  |        Version:
 Severity:  Normal         |     Resolution:
 Keywords:                 |  Actual Points:
Parent ID:                 |         Points:
 Reviewer:  irl            |        Sponsor:
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Changes (by karsten):

 * status:  needs_revision => needs_review


Comment:

 Replying to [comment:9 karsten]:
 > Replying to [comment:7 irl]:
 > > The third graph was I think scrapping the filesize parameters and
 instead using the percentile values. This is probably a different ticket
 if we choose to do it. (We might wait until I look at OnionPerf on LTE
 where we would want to be more conservative on bandwidth usage).
 >
 > Ah, yes. I'll think a bit about that, too, and open a new ticket for it.

 I experimented a bit with this and came to the conclusion that we should
 probably avoid mixing 50 KiB, 1 MiB, and 5 MiB measurements and instead
 focus on 1 MiB measurements only. Otherwise we might see confusing results
 where, for example, partial 5 MiB downloads are completed faster than full
 1 MiB downloads on some days. Also, I could imagine that 1 MiB is still a
 reasonable size for LTE experiments, whereas 5 MiB is too large and 50 KiB
 too small.

 Here's a possible graph:

 [[Image(fractions-op-hk.png, 700px)]]

 (I didn't open a new ticket, because this is still very related to the
 other two graphs. I also finished some code for the first two graphs
 today, but I'd like to test that code some more tomorrow before asking for
 a first review.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25774#comment:11>
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