ettcp output

Hi,
I'm trying to use ettcp test my net bandwith, I've typed ettcp -t -s -u -v

and the output is

ttcp-t: buflen=8192, nbuf=2048, align=16384/0, port=5001 udp -> 192.168.1.2
nttcp-t: 16777216 bytes in 1.40 real seconds = 11741.18 KB/sec +++
nttcp-t: 16777216 bytes in 0.18 CPU seconds = 92579.09 KB/cpu sec
nttcp-t: 2054 I/O calls, msec/call = 0.70, calls/sec = 1471.95
nttcp-t: 0.0user 0.1sys 0:01real 12% 0i+0d 0maxrss 0+3pf 291+1csw
nttcp-t: buffer address 0x8050000

I can't understand the lines 4-5 can anybody help me or indicate me a website

thanks