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[tor-bugs] #1889 [Tor Relay]: Contradictory bandwidth reports in overlapping extra-info descriptors
#1889: Contradictory bandwidth reports in overlapping extra-info descriptors
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Reporter: mwenge | Owner:
Type: defect | Status: new
Priority: normal | Milestone:
Component: Tor Relay | Version:
Keywords: | Parent:
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On a randomly sampled day in July there were 2000+ cases where the bw
reported by extra-info for a given timeslice on a router was two different
measurements, depending on which extra-info descriptor you looked at.
Here is an example in the read history for relay Pounet27TorRelay:
BW NOT EQUAL for 2010-07-30T02:31. Is 439296 : Was 4738048
read-history 2010-07-30 21:46:14 (900 s)
11229184,13546496,11268096,13392896,16567296,9265152,6163456,4869120,8190976,0,0,0,0,0,0,0,0,0,734208,439296,0,0,0,0,0,0,0,0,0,6400000,11721728,12796928,12404736,14963712,13637632,11209728,12163072,10721280,6233088,10669056,9666560,9474048,11543552,11773952,10487808,10580992,10299392,13220864,12548096,11171840,7584768,4970496,3948544,2686976,4140032,4179968,4777984,8782848,9647104,9838592,13700096,10819584,11526144,9906176,14349312,12468224,13254656,8672256,5794816,7155712,3275776,3682304,3339264,6937600,6926336,7901184,8549376,10533888,7639040,9754624,6426624,4097024,5630976,4674560,5093376,6675456,4874240,5531648,3744768,6883328,9871360,11807744,11097088,9028608,9231360,9802752
read-history 2010-07-30 04:46:14 (900 s)
8813568,8123392,9978880,8428544,9339904,6733824,9417728,11633664,11225088,9106432,11148288,7831552,11962368,9401344,8095744,8654848,9501696,7830528,6435840,8958976,4248576,4089856,4747264,6569984,4973568,2717696,5286912,0,0,1968128,0,0,0,0,0,0,0,0,0,2446336,5278720,6597632,4627456,7857152,7080960,8280064,5863424,7086080,5991424,2252800,1883136,5161984,3418112,4377600,3938304,6874112,5746688,2485248,3495936,4019200,6891520,3680256,4489216,4912128,3629056,1320960,7661568,11542528,11229184,13546496,11268096,13392896,16567296,9265152,6163456,4869120,8190976,0,0,0,0,0,0,0,0,0,245760,4738048,5920768,3057664,4745216,6483968,5610496,5480448,5497856,5471232
The difference starts after the zeros in the following sequence in each
extra-info:
21:46:
11229184,13546496,11268096,13392896,16567296,9265152,6163456,4869120,8190976,0,0,0,0,0,0,0,0,0,245760,4738048
04:46:
11229184,13546496,11268096,13392896,16567296,9265152,6163456,4869120,8190976,0,0,0,0,0,0,0,0,0,734208,439296
I need to characterize the samples I have better to see if there's a
pattern but any idea why this might happen?
--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/1889>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online
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