Hello,

 

I am trying to understand the log file that we get from iperf because I need to 
parse the data and plot and I really need to know if I am doing it right.

 

I want to understand how much thoughput arrive in every second.

 

Imagine that you have the folowing log in the server side:

------------------------------------------------------------
Server listening on TCP port 6101
TCP window size: 64.0 KByte
------------------------------------------------------------
[1900] local 10.16.32.21 port 6101 connected with 10.16.32.111 port 52961
[1864] local 10.16.32.21 port 6101 connected with 10.16.32.111 port 52959
[1844] local 10.16.32.21 port 6101 connected with 10.16.32.111 port 52960
[ ID] Interval       Transfer     Bandwidth
[1900]  0.0- 1.0 sec  0.00 Bytes  0.00 bits/sec
[1900]  1.0- 2.0 sec  0.00 Bytes  0.00 bits/sec
[1900]  2.0- 3.0 sec  7.91 KBytes  64.8 Kbits/sec
[SUM]  0.0- 3.0 sec  7.91 KBytes  21.6 Kbits/sec
[1864]  0.0- 1.0 sec   104 KBytes   849 Kbits/sec
[1844]  0.0- 1.0 sec   105 KBytes   860 Kbits/sec
[1900]  3.0- 4.0 sec   143 KBytes  1.18 Mbits/sec
[SUM]  0.0- 4.0 sec   352 KBytes   721 Kbits/sec
[1864]  1.0- 2.0 sec   155 KBytes  1.27 Mbits/sec
[1844]  1.0- 2.0 sec  94.9 KBytes   778 Kbits/sec
[1900]  4.0- 5.0 sec   112 KBytes   917 Kbits/sec
[SUM]  1.0- 5.0 sec   362 KBytes   742 Kbits/sec
[1900]  5.0- 6.0 sec  75.7 KBytes   620 Kbits/sec
[1864]  2.0- 3.0 sec  90.3 KBytes   740 Kbits/sec
[1844]  2.0- 3.0 sec  39.8 KBytes   326 Kbits/sec
[SUM]  2.0- 6.0 sec   206 KBytes   422 Kbits/sec
[1864]  3.0- 4.0 sec   155 KBytes  1.27 Mbits/sec
[1900]  6.0- 7.0 sec   157 KBytes  1.28 Mbits/sec
[1844]  3.0- 4.0 sec  70.4 KBytes   577 Kbits/sec
[SUM]  3.0- 7.0 sec   383 KBytes   783 Kbits/sec


 

Can I say that the throughput in every second is the sum of the one I get for 
each pair although they are print in the log after a while...

 

1 sec - TPT = 0 + 0.849 + 0.860

2 sec - TPT = 0 + 1.27 + 0.721

3 sec - TPT = 0.0216 + 1.18 + 1.27

....

 

If this is right and I can sum the different throughput values although they 
are print later in the log file, can someone help me to understand why they are 
printed later

 

 

Best Regards,

Marta

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