[tor-bugs] #4086 [Analysis]: Compare performance of TokenBucketRefillInterval params in simulated network

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#4086: Compare performance of TokenBucketRefillInterval params in simulated
network
-------------------------------------+--------------------------------------
 Reporter:  arma                     |          Owner:       
     Type:  task                     |         Status:  new  
 Priority:  normal                   |      Milestone:       
Component:  Analysis                 |        Version:       
 Keywords:  performance flowcontrol  |         Parent:  #4465
   Points:                           |   Actualpoints:       
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Comment(by arma):

 Replying to [comment:15 robgjansen]:
 > I'm not sure why you think there will be much less capacity. I've
 attached
 [https://trac.torproject.org/projects/tor/attachment/ticket/4086/consensus_vs_observed.pdf
 a CDF showing the distribution of consensus bandwidth weights vs relay-
 reported observed bandwidth]. Turns out the difference between the CDFs
 (absolute value of the difference in the integral over the range
 [0,infty]) is less than 1000 KiB/s.

 That's really surprising!

 As a couple of examples right now, we have

 {{{
 r Unnamed VXv0HBzh4bSCg7fpdjDkLe2Imj0 BzyZRxkk3iv/Ztj2M+RonaHxkrA
 2012-03-08 20:
 10:55 93.182.132.103 9002 9031
 s Exit Fast Guard HSDir Running Stable V2Dir Valid
 v Tor 0.2.2.35
 w Bandwidth=103000
 }}}
 where the descriptor bandwidth is more like 20000

 {{{
 r BigBoy n4lJHKt7A2hd6r01jhk/+nTY2DY hnylYApnhz1DYl2wcwWMzrEdYZg
 2012-03-09 03:1
 4:58 38.229.79.2 443 8080
 s Fast Guard HSDir Named Running Stable V2Dir Valid
 v Tor 0.2.3.12-alpha
 w Bandwidth=107000
 }}}
 with a descriptor bandwidth more like 25460

 {{{
 r wau DsurM90nptpcEUGzn4Ofkx+SM0w S5HeHK3MLzA4USBE2KEaCPPuj/8 2012-03-08
 21:09:5
 8 109.163.233.200 443 80
 s Exit Fast Named Running V2Dir Valid
 v Tor 0.2.3.12-alpha
 w Bandwidth=154000
 }}}
 which is rate limited to 30834.

 How could the sum of the differences possibly be less than 1000 here?

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4086#comment:17>
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