The graphs show results from a real file transfer over the nistnet testbed from pinto to pinto10. Nistnet was configured as follows:
pinto.ccs.ornl.gov pinto10 --delay 35.000 --drop 0.0107
pinto10 pinto.ccs.ornl.gov --delay 35.000 --drop 0.0107
The file transferred is 214649928 bytes. The drop rate--a little
over .01%--consistently results in 16 to 20 packets being dropped.
This is confirmed by FOBS results:
It is going to take 3 iterations to transfer the data
Iteration 0 Pkts = 71527
------RemPkts = 9
pktsRem[0] = 2
pktsRem[1] = 2
pktsRem[2] = 0
pktsRem[3] = 0
pktsRem[4] = 2
pktsRem[5] = 1
pktsRem[6] = 1
pktsRem[7] = 1
----------------------------------------------------------------
Iteration 1 Pkts = 71527
------RemPkts = 8
pktsRem[0] = 1
pktsRem[1] = 1
pktsRem[2] = 0
pktsRem[3] = 2
pktsRem[4] = 1
pktsRem[5] = 1
pktsRem[6] = 1
pktsRem[7] = 1
----------------------------------------------------------------
Iteration 2 Pkts = 3367
(No pkts were indicated as lost)
This is also confirmed by iperf results:[ffowler@pinto10 ffowler]$ iperf -s -u -w 2m -p 5005 ------------------------------------------------------------ Server listening on UDP port 5005 Receiving 1470 byte datagrams UDP buffer size: 4.0 MByte (WARNING: requested 2.0 MByte) ------------------------------------------------------------ [ 3] local 10.10.10.2 port 5005 connected with 160.91.192.110 port 32768 [ ID] Interval Transfer Bandwidth Jitter Lost/Total Datagrams [ 3] 0.0-20.0 sec 221 MBytes 92.8 Mbits/sec 0.027 ms 16/157853 (0.01%)...And also TCP
[ffowler@pinto ffowler]$ iperf100 -c 10.10.10.2 -t 45 -P 3 -p 5005 ------------------------------------------------------------ Client connecting to 10.10.10.2, TCP port 5005 TCP window size: 64.0 KByte (default) ------------------------------------------------------------ [ 3] local 160.91.192.110 port 32843 connected with 10.10.10.2 port 5005 [ 7] local 160.91.192.110 port 32845 connected with 10.10.10.2 port 5005 [ 6] local 160.91.192.110 port 32844 connected with 10.10.10.2 port 5005 [ ID] Interval Transfer Bandwidth [ 6] 0.0-45.1 sec 72.5 MBytes 13.5 Mbits/sec PktsRetrans 6 [ 3] 0.0-45.1 sec 83.2 MBytes 15.5 Mbits/sec PktsRetrans 6 [ 7] 0.0-45.1 sec 64.7 MBytes 12.0 Mbits/sec PktsRetrans 8