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[mininet-discuss] iperf performance variation

Yichuan Wang yicwang at ucdavis.edu
Thu Apr 24 01:13:31 PDT 2014


Hi,

If I repeat the iperf test on the same topology the result varies a lot. Is
this normal?
BTW, is there a way to check which virtual router package I am using?

Thanks,
Yichuan

mn --version
2.1.0+

ovs-controller --version
ovs-controller (Open vSwitch) 1.10.2
Compiled Sep 23 2013 14:53:13
OpenFlow versions 0x1:0x4




*** Creating network
*** Adding controller
*** Adding hosts:
h1 h2
*** Adding switches:
s1
*** Adding links:
(0.50Mbit 1ms delay 5% loss) (0.50Mbit 1ms delay 5% loss) (h1, s1)
(0.50Mbit 1ms delay 5% loss) (0.50Mbit 1ms delay 5% loss) (h2, s1)
*** Configuring hosts
h1 h2
*** Starting controller
*** Starting 1 switches
s1 (0.50Mbit 1ms delay 5% loss) (0.50Mbit 1ms delay 5% loss)
*** Starting CLI:
mininet> iperf
*** Iperf: testing TCP bandwidth between h1 and h2
*** Results: ['451 Kbits/sec', '501 Kbits/sec']
mininet> iperf
*** Iperf: testing TCP bandwidth between h1 and h2
*** Results: ['376 Kbits/sec', '499 Kbits/sec']
mininet> iperf
*** Iperf: testing TCP bandwidth between h1 and h2
*** Results: ['235 Kbits/sec', '252 Kbits/sec']
mininet> iperf
*** Iperf: testing TCP bandwidth between h1 and h2
*** Results: ['424 Kbits/sec', '482 Kbits/sec']
mininet> iperf
*** Iperf: testing TCP bandwidth between h1 and h2
*** Results: ['397 Kbits/sec', '464 Kbits/sec']
mininet> iperf
*** Iperf: testing TCP bandwidth between h1 and h2
*** Results: ['130 Kbits/sec', '139 Kbits/sec']
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