Ok, it looks like the –B option on the client gets you part of the way there. It will cause the client to use the port from –p for both remote and local. It looks something like:
client: iperf -c rjm-sfast-lx2 -p 60005 -t 5 -i 0.5 -B 10.19.87.176 server: [ 5] local 10.19.85.169 port 60005 connected with 10.19.87.176 port 60005 [ 5] 0.000-5.002 sec 1.89 GBytes 3.24 Gbits/sec If you need a different port for local and the remote it would require a code change to support passing in the local port value. Bob From: Bob (Robert) McMahon Sent: Wednesday, August 13, 2014 4:43 PM To: 'Sijo Joy' Cc: [email protected] Subject: RE: [Iperf-users] Iperf report interval granularity in milliseconds hmm, let me look at the code and see what it does. Is it the same IP for the clients? Bob From: Sijo Joy [mailto:[email protected]] Sent: Wednesday, August 13, 2014 12:24 PM To: Bob (Robert) McMahon Cc: [email protected]<mailto:[email protected]> Subject: Re: [Iperf-users] Iperf report interval granularity in milliseconds Thanks a lot Bob. Could achieve up to 10 ms granularity for iperf reporting. Another question i have is; whether it would be possible to specify a custom source port number at at the client side when the iperf client initiates a TCP connection. The purpose is to distinguish between two connections at the server using the TCP source port number. Checked the -p and -L options; which would not be of help in this case. Regards, Sijo On Wed, Aug 13, 2014 at 1:43 AM, Bob (Robert) McMahon <[email protected]<mailto:[email protected]>> wrote: Sorry, full url is: http://sourceforge.net/projects/iperf2/?source=directory From: Bob (Robert) McMahon [mailto:[email protected]<mailto:[email protected]>] Sent: Tuesday, August 12, 2014 9:26 PM To: Sijo Joy Cc: [email protected]<mailto:[email protected]> Subject: Re: [Iperf-users] Iperf report interval granularity in milliseconds Ok, source code is here sourceforge.net/projects/iperf2/?source=directory<http://sourceforge.net/projects/iperf2/?source=directory> I’ve got other changes I haven’t committed yet but the above should do what you want. Bob From: Sijo Joy [mailto:[email protected]] Sent: Tuesday, August 12, 2014 8:12 PM To: Bob (Robert) McMahon Cc: [email protected]<mailto:[email protected]> Subject: RE: [Iperf-users] Iperf report interval granularity in milliseconds Hi, I am using Ubuntu (linux kernel version 3.2.18). Sijo On Aug 12, 2014 7:36 PM, "Bob (Robert) McMahon" <[email protected]<mailto:[email protected]>> wrote: I recompiled iperf to support smaller intervals. What platform are you using? Bob From: Sijo Joy [mailto:[email protected]<mailto:[email protected]>] Sent: Tuesday, August 12, 2014 11:57 AM To: [email protected]<mailto:[email protected]> Subject: [Iperf-users] Iperf report interval granularity in milliseconds Hi, Iperf can report throughput in a step of 0.5 second (specified via - i option). Can it use a even smaller interval, such as in the order of milliseconds or 10 milliseconds? Is there any other tools which can reach that granularity? Thanks for your inputs in advance. Best Regards, Sijo -- Respect Nature
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