[net-perf] bwctl testing

[Mike Iglesias]

> 
> I'm seeing the same funny performance stuff to UCLA that Mike Iglesias
> saw.  I get about 22 mbit/sec sending to UCLA, and 75-85 mbit/sec
> receiving.  My system is on a 100 mbit/sec tap at the moment, so I'm
> not really concerned about the receive rate.  But the sending rate
> is puzzling.

I ran a test between your system and mine, and got similar results when
your system is sending to mine.  Here's the tcptrace window info for that
connection:

             UCSC                                     UCI
     max win adv:         1049792 bytes     max win adv:          787712 bytes
     min win adv:         1049792 bytes     min win adv:            5888 bytes

bwctl reported the transfer rate at 22.7mb/s, so at least that is consistant
when you're sending down here.  I got 71.8mb/s when my system was sending
to yours.  I used '-w 1m' as well for these tests.


Mike Iglesias                          Email:       iglesias at draco.acs.uci.edu
University of California, Irvine       phone:       949-824-6926
Network & Academic Computing Services  FAX:         949-824-2069