[tor-bugs] #17810 [Core Tor/Torflow]: TorFlow should ignore self-reported bandwidths when measuring relays

Tor Bug Tracker & Wiki blackhole at torproject.org
Wed May 2 00:48:45 UTC 2018


#17810: TorFlow should ignore self-reported bandwidths when measuring relays
------------------------------+------------------------
 Reporter:  robgjansen        |          Owner:  (none)
     Type:  defect            |         Status:  new
 Priority:  Medium            |      Milestone:
Component:  Core Tor/Torflow  |        Version:
 Severity:  Normal            |     Resolution:
 Keywords:                    |  Actual Points:
Parent ID:                    |         Points:
 Reviewer:                    |        Sponsor:
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Comment (by starlight):

 Replying to [comment:18 robgjansen]:
 > . . . And it doesn't even measure residual capacity exactly, because of
 scheduling and fairness. For example, if my relay is operating at 100%
 link utilization and TorFlow tries to measure it, TorFlow isn't going to
 get 0 bandwidth and it isn't going to get 100% bandwidth; TorFlow is
 probably only going to get roughly 1/N of my bandwidth where N is the
 number of other active flows.

 Excellent point!  I had not considered this previously.

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17810#comment:21>
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