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Opened 10 years ago

Closed 10 years ago

#2704 closed defect (worksforme)

Big Latency in ad-hoc enviroment (madwifi)

Reported by: lan@… Owned by: developers
Priority: high Milestone:
Component: kernel Version:
Keywords: Cc:

Description

all nodes are meraki mini with kamikaze current from svn (08/11 relase)

this is the topology: with olsr routing protocol

A ---- B ---- C

D------|

ping from b to a is ok, 5 ms
ping from d to a is ok, 5 ms
ping from b to d is ok, 3 ms
ping from c to a is bad, 300ms (equals if C use b or d nodes to go to a)
ping from c to b is bad
ping from c to d is bad

this is the config:

# mesh
config wifi-device wifi0

option type atheros
option channel 1
option diversity 0
option txantenna 1
option rxantenna 1
option agmode 11g

config wifi-iface

option device wifi0
option mode adhoc
option ssid mesh
option hidden 0
option encryption wep
option key XZXXXXXXXXXXXXXXXX
option bssid EE:33:AA:F7:FF:EE
option txpower 18
#option rts 250
#option frag 256
option ifname ath0
option rate 12M
option bintval 1000

This is an example of ping:
~$ ping 10.1.1.13
PING 10.1.1.13 (10.1.1.13): 56 data bytes
64 bytes from 10.1.1.13: seq=0 ttl=63 time=702.235 ms
64 bytes from 10.1.1.13: seq=1 ttl=63 time=710.667 ms
64 bytes from 10.1.1.13: seq=2 ttl=63 time=721.974 ms
64 bytes from 10.1.1.13: seq=3 ttl=63 time=736.056 ms
64 bytes from 10.1.1.13: seq=4 ttl=63 time=755.334 ms
64 bytes from 10.1.1.13: seq=5 ttl=63 time=765.026 ms
64 bytes from 10.1.1.13: seq=6 ttl=63 time=775.353 ms
64 bytes from 10.1.1.13: seq=7 ttl=63 time=793.263 ms
64 bytes from 10.1.1.13: seq=8 ttl=63 time=805.457 ms
64 bytes from 10.1.1.13: seq=9 ttl=63 time=826.239 ms
64 bytes from 10.1.1.13: seq=10 ttl=63 time=800.674 ms
64 bytes from 10.1.1.13: seq=15 ttl=63 time=868.805 ms
64 bytes from 10.1.1.13: seq=16 ttl=63 time=884.634 ms
64 bytes from 10.1.1.13: seq=17 ttl=63 time=895.511 ms
64 bytes from 10.1.1.13: seq=18 ttl=63 time=910.915 ms
64 bytes from 10.1.1.13: seq=19 ttl=63 time=924.285 ms
64 bytes from 10.1.1.13: seq=20 ttl=63 time=940.299 ms
64 bytes from 10.1.1.13: seq=21 ttl=63 time=952.397 ms
64 bytes from 10.1.1.13: seq=22 ttl=63 time=4.756 ms
64 bytes from 10.1.1.13: seq=23 ttl=63 time=4.516 ms
64 bytes from 10.1.1.13: seq=24 ttl=63 time=4.900 ms
64 bytes from 10.1.1.13: seq=25 ttl=63 time=4.964 ms
64 bytes from 10.1.1.13: seq=26 ttl=63 time=7.112 ms
64 bytes from 10.1.1.13: seq=27 ttl=63 time=11.990 ms
64 bytes from 10.1.1.13: seq=28 ttl=63 time=26.017 ms
64 bytes from 10.1.1.13: seq=29 ttl=63 time=39.816 ms
64 bytes from 10.1.1.13: seq=30 ttl=63 time=56.966 ms
64 bytes from 10.1.1.13: seq=31 ttl=63 time=69.560 ms
64 bytes from 10.1.1.13: seq=32 ttl=63 time=83.144 ms
64 bytes from 10.1.1.13: seq=33 ttl=63 time=100.662 ms
64 bytes from 10.1.1.13: seq=34 ttl=63 time=109.167 ms
64 bytes from 10.1.1.13: seq=35 ttl=63 time=123.960 ms
64 bytes from 10.1.1.13: seq=36 ttl=63 time=143.942 ms
64 bytes from 10.1.1.13: seq=37 ttl=63 time=151.824 ms
64 bytes from 10.1.1.13: seq=38 ttl=63 time=167.453 ms
64 bytes from 10.1.1.13: seq=39 ttl=63 time=179.883 ms
64 bytes from 10.1.1.13: seq=40 ttl=63 time=194.227 ms
64 bytes from 10.1.1.13: seq=41 ttl=63 time=210.396 ms
64 bytes from 10.1.1.13: seq=42 ttl=63 time=227.910 ms
64 bytes from 10.1.1.13: seq=43 ttl=63 time=236.357 ms
64 bytes from 10.1.1.13: seq=44 ttl=63 time=251.704 ms
64 bytes from 10.1.1.13: seq=45 ttl=63 time=262.339 ms
64 bytes from 10.1.1.13: seq=46 ttl=63 time=270.684 ms
64 bytes from 10.1.1.13: seq=47 ttl=63 time=283.191 ms
64 bytes from 10.1.1.13: seq=48 ttl=63 time=297.039 ms
64 bytes from 10.1.1.13: seq=49 ttl=63 time=311.312 ms
64 bytes from 10.1.1.13: seq=50 ttl=63 time=324.502 ms
64 bytes from 10.1.1.13: seq=51 ttl=63 time=336.730 ms
64 bytes from 10.1.1.13: seq=52 ttl=63 time=343.602 ms
64 bytes from 10.1.1.13: seq=53 ttl=63 time=357.857 ms
64 bytes from 10.1.1.13: seq=54 ttl=63 time=370.814 ms
64 bytes from 10.1.1.13: seq=55 ttl=63 time=385.450 ms
64 bytes from 10.1.1.13: seq=56 ttl=63 time=397.936 ms
64 bytes from 10.1.1.13: seq=57 ttl=63 time=413.578 ms
64 bytes from 10.1.1.13: seq=58 ttl=63 time=426.745 ms
64 bytes from 10.1.1.13: seq=59 ttl=63 time=440.065 ms
64 bytes from 10.1.1.13: seq=60 ttl=63 time=454.758 ms
64 bytes from 10.1.1.13: seq=61 ttl=63 time=467.750 ms
64 bytes from 10.1.1.13: seq=62 ttl=63 time=482.516 ms
64 bytes from 10.1.1.13: seq=63 ttl=63 time=496.309 ms
64 bytes from 10.1.1.13: seq=64 ttl=63 time=512.784 ms
64 bytes from 10.1.1.13: seq=65 ttl=63 time=524.018 ms
64 bytes from 10.1.1.13: seq=66 ttl=63 time=537.311 ms
64 bytes from 10.1.1.13: seq=67 ttl=63 time=555.060 ms
64 bytes from 10.1.1.13: seq=68 ttl=63 time=567.615 ms
64 bytes from 10.1.1.13: seq=69 ttl=63 time=552.625 ms
64 bytes from 10.1.1.13: seq=70 ttl=63 time=560.079 ms
64 bytes from 10.1.1.13: seq=71 ttl=63 time=577.074 ms
64 bytes from 10.1.1.13: seq=72 ttl=63 time=586.839 ms
64 bytes from 10.1.1.13: seq=73 ttl=63 time=601.287 ms
64 bytes from 10.1.1.13: seq=74 ttl=63 time=616.046 ms
64 bytes from 10.1.1.13: seq=75 ttl=63 time=633.623 ms
64 bytes from 10.1.1.13: seq=76 ttl=63 time=643.363 ms
64 bytes from 10.1.1.13: seq=77 ttl=63 time=656.260 ms

this problem are idipendent from routing, if i stop olsr on all nodes the problem persist.

Regards Giuseppe

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Change History (2)

comment:1 Changed 10 years ago by nbd

Please try latest trunk (after Nov. 28)

comment:2 Changed 10 years ago by nbd

  • Resolution set to worksforme
  • Status changed from new to closed

bug response timeout

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