Openmoko Bug #2223: gsm0710muxd loosing packets?

[Openmoko Public Trac]

#2223: gsm0710muxd loosing packets?
------------------------+---------------------------------------------------
 Reporter:  kapiteined  |          Owner:  Nytowl     
     Type:  defect      |         Status:  new        
 Priority:  normal      |      Milestone:  Om2008.12  
Component:  Distro      |        Version:  unspecified
 Severity:  normal      |       Keywords:             
 Haspatch:  0           |      Blockedby:             
Estimated:              |    Patchreview:             
 Blocking:              |   Reproducible:             
------------------------+---------------------------------------------------

Comment(by kapiteined):

 >  This is with using my new multiplexer fso-abyss:
 >
 >  root at om-gta02:~# ping -s 1400 heise.de
 >  PING heise.de (193.99.144.80): 1400 data bytes
 >  1408 bytes from 193.99.144.80: seq=0 ttl=242 time=2521.968 ms
 >  1408 bytes from 193.99.144.80: seq=1 ttl=242 time=2409.901 ms
 Missing reply 2 and 3
 >  1408 bytes from 193.99.144.80: seq=4 ttl=242 time=2801.211 ms
 >  1408 bytes from 193.99.144.80: seq=5 ttl=242 time=2875.850 ms
 >  1408 bytes from 193.99.144.80: seq=6 ttl=242 time=2401.183 ms
 >  1408 bytes from 193.99.144.80: seq=7 ttl=242 time=1841.451 ms
 8 is also missing
 >  1408 bytes from 193.99.144.80: seq=9 ttl=242 time=2391.964 ms
 >  1408 bytes from 193.99.144.80: seq=10 ttl=242 time=2490.054 ms
 And so is 11
 >  1408 bytes from 193.99.144.80: seq=12 ttl=242 time=2407.468 ms
 >  1408 bytes from 193.99.144.80: seq=13 ttl=242 time=2511.972 ms
 >  1408 bytes from 193.99.144.80: seq=14 ttl=242 time=2332.015 ms
 >  1408 bytes from 193.99.144.80: seq=15 ttl=242 time=2651.661 ms
 >  1408 bytes from 193.99.144.80: seq=16 ttl=242 time=2761.595 ms
 >  1408 bytes from 193.99.144.80: seq=17 ttl=242 time=2410.165 ms
 >  1408 bytes from 193.99.144.80: seq=18 ttl=242 time=1848.718 ms
 hey 19 is gone
 >  1408 bytes from 193.99.144.80: seq=20 ttl=242 time=2410.162 ms
 >  1408 bytes from 193.99.144.80: seq=21 ttl=242 time=2891.949 ms
 what happened to 22?
 >  1408 bytes from 193.99.144.80: seq=23 ttl=242 time=2511.832 ms
 >  1408 bytes from 193.99.144.80: seq=24 ttl=242 time=2647.290 ms
 >  1408 bytes from 193.99.144.80: seq=25 ttl=242 time=2418.948 ms
 >  1408 bytes from 193.99.144.80: seq=26 ttl=242 time=2434.499 ms
 27 and 28 on a holiday?
 >  1408 bytes from 193.99.144.80: seq=29 ttl=242 time=2356.914 ms

 etc


 As you can see, some replies are lost, and because i build a ssh tunnel
 (tcp) over the grps connection it will cause a retransmit.
 And this will acumulate over time if the retransmits also loose packets.
 i think that is why my ping times are increasing to the point where it
 stops.

 Kind regards,
 Ed

-- 
Ticket URL: <https://docs.openmoko.org/trac/ticket/2223#comment:6>
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