Bash script average of iperf result

Question

I'm running iperf multiple times via the following command

iperf -c 1.1.1.1 -t 60 -w 6400 -f m >> iperf.log

sometimes with different arguments. The resulting iperf.log may look like this:

[ 3] local 2.2.2.2 port 51129 connected with 1.1.1.1 port 5001 
[ ID] Interval Transfer Bandwidth 
[ 3] 0.0-20.0 sec 1869 MBytes 784 Mbits/sec
[ 3] local 2.2.2.2 port 51130 connected with 1.1.1.1 port 5001 
[ ID] Interval Transfer Bandwidth 
[ 3] 0.0-15.0 sec 1445 MBytes 808 Mbits/sec

what i'd like to able to do is once it completed to have the average transfer rate outputted ie

 average ....... XXX Mbits/sec

So when you tried to do that, did something go wrong? Is there a bug or design feature that you need help with? Does `iperf` report the rate and you want to filter it? — Brian Cain, Dec 04 '13 at 15:05
sample output to iperf.log is [ 3] local 2.2.2.2 port 51129 connected with 1.1.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0-20.0 sec 1869 MBytes 784 Mbits/sec [ 3] 0.0-15.0 sec 1445 MBytes 808 Mbits/sec i'd like to be able to add up 784 and 808 and get the average. — Lurch, Dec 04 '13 at 15:08
please learn to edit relevant details into your question above, rather than post it in replies to comments where it is unformatted. `awk` is a very good candidate to help with your problem. Read more at http://www.grymoire.com/Unix/Awk.html . Good luck. — shellter, Dec 04 '13 at 15:27
The idea of adding up 784 and 808 to get the bandwidth looks suspicious since transmit times are different. I assume correct average would be to add up transfer sizes and divide by transfer times. — Dima Chubarov, Dec 04 '13 at 16:15

score 1 · Answer 1 · edited May 07 '14 at 21:56

1

awk is the way to go, you can try something like this:

iperf -c 1.1.1.1 -t 60 -w 6400 -f m|awk -F 'MBytes' {'print $2'} >> iperf.log

You just need to remove the empty lines now, that I will leave to you. :)

edited May 07 '14 at 21:56

Paulo Freitas

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answered May 07 '14 at 21:36

Danilo Fernando Chilene

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score 0 · Answer 2 · answered Oct 12 '17 at 05:15

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Do you need to start and stop it? You might just want to use interval reporting (-i ) You can set i to 15 and set -t to samples desired * 15.

answered Oct 12 '17 at 05:15

rjmcmahon

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i think this is better as comment, not an answer (?) – user1506104 Oct 12 '17 at 05:45
Unfortunately, I didn't have enough points to add a comment. Looks like I may have now. – rjmcmahon Oct 13 '17 at 18:53

Bash script average of iperf result

2 Answers2