quoted

Also note something else strange that it is kind of strange that
something like UDP which doesnt backoff will send out less
packets/second ;->

Cannot explain that either :)

Perhaps delays in restarting after the intra-stack flow control is 
asserted.  One possible thing to do to try to deal with that a little 
would be to increase SO_SNDBUF in netperf with the -s option.  That at 
least is something I did back in 2.4 days

rick jones