new : iperf servers that stay alive

[Marc.Herbert --at-- ens-lyon.fr]

On most systems, iperf servers had a limited life expectancy. I think
you can bring down most TCP iperf servers using such a loop :

n=1; while (./iperf -t 1 -c server.to.crash -P 50 ) ; do  printf "\n\nn $n\n\n\n"; let n=$n+1; date; done


The heavily commented patch "iperf165_thread.patch"
   <http://marc.herbert.free.fr/TCP/iperf/>
hopefully solves the issue. Any feedback on it is highly welcome
(further test results, congratulations, insults,...) It was tested on
debian woody  linux 2.4.18 and Solaris 2.6.


The few UDP tests I performed so far seem to show that this patch also
prevent UDP servers from crashing, but I would not guarantee it; fully
understanding the behaviour of the iperf threads in case of
unreliability and timeouts is much more complex than in the case of TCP.



Sincerely,

-- 
Marc Herbert
Ph.D Intern
SunLabs Europe / INRIA