[root@w02gva cheng]# iperf -s -u -i 5
------------------------------------------------------------
Server listening on UDP port 5001
Receiving 1470 byte datagrams
UDP buffer size: 28.6 MByte (default)
------------------------------------------------------------
[  3] local 192.91.239.213 port 5001 connected with 198.51.111.66 port 32772
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[  3]  0.0- 0.9 sec   106 MBytes   957 Mbits/sec  0.026 ms    0/75809 (0%)
[  6] local 192.91.239.213 port 5001 connected with 198.51.111.66 port 32772
[ ID] Interval       Transfer     Bandwidth       Jitter   Lost/Total Datagrams
[  6]  0.0- 5.0 sec   570 MBytes   957 Mbits/sec  0.006 ms    0/406886 (0%)
[  6]  5.0-10.0 sec   570 MBytes   957 Mbits/sec  0.012 ms    0/406869 (0%)
[  6]  0.0-10.9 sec   1.2 GBytes   957 Mbits/sec  0.024 ms    0/884017 (0%)
Segmentation fault
[root@w02gva cheng]# iperf -s -w 128M -i 5
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 57.2 MByte (WARNING: requested  128 MByte)
------------------------------------------------------------
[  6] local 192.91.239.213 port 5001 connected with 198.51.111.66 port 32770
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0- 5.0 sec   5.3 MBytes   8.8 Mbits/sec
[  6]  5.0-10.0 sec  29.5 MBytes  49.6 Mbits/sec
[  6] 10.0-15.0 sec  68.8 MBytes   115 Mbits/sec
[  6] 15.0-20.0 sec  73.6 MBytes   123 Mbits/sec
[  6] 20.0-25.0 sec  73.6 MBytes   124 Mbits/sec
[  6] 25.0-30.0 sec  73.7 MBytes   123 Mbits/sec
[  6] 30.0-35.0 sec  73.6 MBytes   124 Mbits/sec
[  6] 35.0-40.0 sec  73.5 MBytes   123 Mbits/sec
[  6] 40.0-45.0 sec  73.7 MBytes   124 Mbits/sec
[  6] 45.0-50.0 sec  73.7 MBytes   123 Mbits/sec
[  6] 50.0-55.0 sec  73.6 MBytes   124 Mbits/sec
[  6] 55.0-60.0 sec  73.8 MBytes   123 Mbits/sec
[  6] 60.0-65.0 sec  73.4 MBytes   124 Mbits/sec
[  6] 65.0-70.0 sec  73.8 MBytes   124 Mbits/sec
[  6] 70.0-75.0 sec  73.5 MBytes   123 Mbits/sec
[  6]  0.0-79.8 sec   1.0 GBytes   111 Mbits/sec
[  6] local 192.91.239.2 port 5001 connected with 198.51.111.66 port 32771
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0- 5.0 sec   8.3 MBytes  13.9 Mbits/sec
[  6]  5.0-10.0 sec  64.7 MBytes   109 Mbits/sec
[  6] 10.0-15.0 sec   158 MBytes   266 Mbits/sec
[  6] 15.0-20.0 sec   370 MBytes   621 Mbits/sec
[  6] 20.0-25.0 sec   501 MBytes   841 Mbits/sec
[  6] 25.0-30.0 sec   505 MBytes   847 Mbits/sec
[  6] 30.0-35.0 sec   504 MBytes   846 Mbits/sec
[  6] 35.0-40.0 sec   505 MBytes   848 Mbits/sec
[  6] 40.0-45.0 sec   506 MBytes   848 Mbits/sec
[  6] 45.0-50.0 sec   505 MBytes   847 Mbits/sec
[  6] 50.0-55.0 sec   504 MBytes   846 Mbits/sec
[  6] 55.0-60.0 sec   505 MBytes   848 Mbits/sec
[  6] 60.0-65.0 sec   505 MBytes   848 Mbits/sec