[e2e] query reg improving TCP performane

[query]

Hi Lachlan  and All ,

     Once gain thanks a lot.


To send UDP at a rate higher than 1Mbps, you need to specify  -b  to
> iperf.  Unlike TCP, UDP doesn't "probe" for bandwidth, so you have to
> specify the rate you want to send at.  From   iperf -h:
>
>     Usage: iperf [-s|-c host] [options]
>            iperf [-h|--help] [-v|--version]
>     Client specific:
>       -b, --bandwidth #[KM]    for UDP, bandwidth to send at in bits/sec
>                                (default 1 Mbit/sec, implies -u)
>
>    I   tried with the -b option  and once again the results are
> impressive.

      The following  are the  result.

       $ iperf -u -c 10.128.0.2  -b 100m -t 300 -i 2
       ------------------------------------------------------------
       Client connecting to 10.128.0.2, UDP port 5001
       Sending 1470 byte datagrams
       UDP buffer size:   105 KByte (default)
      ------------------------------------------------------------
      [  3] local 192.168.60.62 port 32772 connected with 10.128.0.2 port
5001
      [  3]  0.0- 2.0 sec  22.9 MBytes  96.0 Mbits/sec
      [  3]  2.0- 4.0 sec  22.8 MBytes  95.6 Mbits/sec
      [  3]  4.0- 6.0 sec  22.8 MBytes  95.8 Mbits/sec
      [  3]  6.0- 8.0 sec  22.8 MBytes  95.8 Mbits/sec
      [  3]  8.0-10.0 sec  22.8 MBytes  95.6 Mbits/sec
      [  3] 10.0-12.0 sec  22.8 MBytes  95.8 Mbits/sec

    So , I am getting a link utilisation of 95 mbs .

    Once again thanks to all who  guided me in understanding and  completing
the experiment satisfactorily.
    Now , I will try to get the router level information and I will get back
to the mailing list.

    With Thanks and Regards
    zaman


--
> Lachlan Andrew  Dept of Computer Science, Caltech
> 1200 E California Blvd, Mail Code 256-80, Pasadena CA 91125, USA
> Phone: +1 (626) 395-8820    Fax: +1 (626) 568-3603
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.postel.org/pipermail/end2end-interest/attachments/20070707/206e0ce4/attachment-0001.html