[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:7 irl]:
 > Replying to [comment:4 karsten]:
 > > Indeed, this might be related to us not using guards. And yes, we
 should investigate this more and document it.
 >
 > I've made a separate ticket for this: #26597

 Thanks!

 > Replying to [comment:5 karsten]:
 > > I made a plot with round-trip latencies by onion vs. public server:
 > > What do you think?
 >
 > This is really cool! I think using the transparent colours as in the
 connbidirect graph would be safe here to allow a more direct comparison
 between public/onion.
 >
 > Can you make a couple of graphs, one for circ build times and one for
 rtt using the transparent colours just to see them?

 Sure. I also changed them towards displaying a single source, which is
 closer to what we'd have on Tor Metrics later on (including the choice to
 display all sources together):

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

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

 > > And was there another graph we discussed in Aberdeen that we could
 make from existing data? I vaguely recall we discussed three possible
 graphs, but I don't remember whether all three of them would use existing
 data.
 >
 > 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.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/25774#comment:9>
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