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Re: bandwith measurement



Zeimm -

As Randy said, there are some additional tools listed at CAIDA

http://www.caida.org/tools/taxonomy/perftaxonomy.xml

including an updated/differnet version of pathchar
http://www.employees.org/~bmah/Software/pchar/

see the "other work" links on this page which includes pipechar,
an lbl tool that performs hop-by-hop link measurements by
using multi-packet probes of varying sizes.

http://www.didc.lbl.gov/pipechar/

Lucy E. Lynch 				Academic User Services
Computing Center			University of Oregon
llynch at darkwing.uoregon.edu		(541) 346-1774

sample pipechar output (uo to psg)

 ./pipechar psg.com
0: localhost [9 hops]
 1: uonet2-gw.uoregon.edu               (128.223.214.3)   7.38  11.10
16.39ms
 2: cisco7-gw.uoregon.edu               (128.223.2.7)     7.59   9.75
14.19ms
 3: verio-gw.oregon-ix.net              (198.32.162.6)    7.49 -29.74
36.93ms
 4: d3-0-1-0.r01.ptldor01.us.ra.verio.net(129.250.55.113)         7.59
9.12  19.32ms
 5: ge-1-0-0.r01.ptldor01.us.bb.verio.net(129.250.30.145)         7.54
9.61  19.28ms
 6: p4-6-1-0.r04.sttlwa01.us.bb.verio.net(129.250.3.37)   7.66   9.71
24.83ms
 7: et-3-0.o00.sttlwa01.us.bb.verio.net (129.250.31.130)          8.04
9.80  28.27ms
 8: psg.o00.sttlwa01.us.bb.verio.net    (129.250.16.238)         54.51
81.01 149.12ms
 9: psg.com                             (147.28.0.62)    54.84  73.05
133.82ms

PipeCharacter statistics: 95.15% reliable
From localhost:
|       9.753 Mbps  10BT (9.9249 Mbps)

1: uonet2-gw.uoregon.edu           (128.223.214.3)
|
|       9.934 Mbps               <2.7789% BW used>
2: cisco7-gw.uoregon.edu           (128.223.2.7 )
|
|       9.874 Mbps               <1.3697% BW used>
3: verio-gw.oregon-ix.net          (198.32.162.6)
|
|       9.604 Mbps               <1.3177% BW used>
4: d3-0-1-0.r01.ptldor01.us.ra.verio.net(129.250.55.113)
|
|       9.871 Mbps               <0.5930% BW used>
5: ge-1-0-0.r01.ptldor01.us.bb.verio.net(129.250.30.145)
|
|       9.909 Mbps               <1.4629% BW used>
6: p4-6-1-0.r04.sttlwa01.us.bb.verio.net(129.250.3.37)
|
|       9.807 Mbps               <4.7287% BW used>
7: et-3-0.o00.sttlwa01.us.bb.verio.net(129.250.31.130)
|
|       1.390 Mbps               <8.9013% BW used> May get 85.26%
congested
8: psg.o00.sttlwa01.us.bb.verio.net(129.250.16.238)
|       1.313 Mbps  T1 (1.4263 Mbps)

9: psg.com                         (147.28.0.62 )
[pythia:/home/llynch/tmp/solaris.sun4/bin] 45 # !!
./pipechar psg.com
0: localhost [9 hops]
 1: uonet2-gw.uoregon.edu               (128.223.214.3)   7.57   9.23
13.46ms
 2: cisco7-gw.uoregon.edu               (128.223.2.7)     7.35  10.17
15.01ms
 3: verio-gw.oregon-ix.net              (198.32.162.6)    7.73  10.35
16.56ms
 4: d3-0-1-0.r01.ptldor01.us.ra.verio.net(129.250.55.113)         7.58
9.82  19.55ms
 5: ge-1-0-0.r01.ptldor01.us.bb.verio.net(129.250.30.145)         7.48
9.85  20.70ms
 6: p4-6-1-0.r04.sttlwa01.us.bb.verio.net(129.250.3.37)   7.57   9.04
23.71ms
 7: et-3-0.o00.sttlwa01.us.bb.verio.net (129.250.31.130)          8.27
10.88  28.20ms
 8: psg.o00.sttlwa01.us.bb.verio.net    (129.250.16.238)         54.33
82.03 149.11ms
 9: psg.com                             (147.28.0.62)    54.41  66.95
121.88ms

PipeCharacter statistics: 95.15% reliable
From localhost:
|       9.507 Mbps  10BT (10.0751 Mbps)

1: uonet2-gw.uoregon.edu           (128.223.214.3)
|
|       10.066 Mbps              <2.9975% BW used>
2: cisco7-gw.uoregon.edu           (128.223.2.7 )
|
|       10.126 Mbps              <4.9922% BW used>
3: verio-gw.oregon-ix.net          (198.32.162.6)
|
|       10.396 Mbps              <1.9012% BW used>
4: d3-0-1-0.r01.ptldor01.us.ra.verio.net(129.250.55.113)
|
|       10.129 Mbps              <1.3184% BW used>
5: ge-1-0-0.r01.ptldor01.us.bb.verio.net(129.250.30.145)
|
|       10.091 Mbps              <1.0836% BW used>
6: p4-6-1-0.r04.sttlwa01.us.bb.verio.net(129.250.3.37)
|
|       10.193 Mbps              <8.5006% BW used>
7: et-3-0.o00.sttlwa01.us.bb.verio.net(129.250.31.130)
|
|       1.510 Mbps               <8.6112% BW used> May get 84.78%
congested
8: psg.o00.sttlwa01.us.bb.verio.net(129.250.16.238)
|       1.323 Mbps  T1 (1.4737 Mbps)

9: psg.com                         (147.28.0.62 )

On Tue, 3 Jul 2001, Randy Bush wrote:

> > Pathchar's algorithm is flawed
>
> send better code
>
> > There is a method I use for testing the bandwidth of links, just using
> > ping.
>
> and this is better than pathchar?  ha ha.
>
> randy
>
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