On 10/14/08 6:32 PM, "Bill Fink" <bill@wizard.sci.gsfc.nasa.gov> wrote:

> > I ran a _much_ longer test over the weekend.  My intent was to transmit
> > one petabyte of data simultaneously in both directions across the OC-768c
> > MAX<->McLean link. 
> > 
> > Here is a
> > synopsis of the test run:
> > 
> > Script started on Sat 11 Oct 2008 02:05:42 AM EDT
> > [root@chance8 ~]# taskset 1 nuttcp -Itx1 -u -Ri9.3g -n1p -i1m -l8972 -w20m
> > 192.168.88.13 &
> > [root@chance8 ~]# nuttcp -Irx1 -u -Ri9.3g -r -n1p -i1m -l8972 -w20m
> > 192.168.88.1
> > 6 192.168.88.14
> > tx1: 66508.4273 MB /  60.00 sec = 9297.7906 Mbps     0 / 7772976 ~drop/pkt
> > 0.00 ~%loss
> > rx1: 66508.5813 MB /  60.00 sec = 9298.0497 Mbps     0 / 7772994 ~drop/pkt
> > 0.00 ~%loss
> > tx1: 66504.2432 MB /  60.00 sec = 9297.7939 Mbps     0 / 7772487 ~drop/pkt
> > 0.00 ~%loss
> > rx1: 66504.9876 MB /  60.00 sec = 9298.0187 Mbps     0 / 7772574 ~drop/pkt
> > 0.00 ~%loss
> > tx1: 66500.6153 MB /  60.00 sec = 9297.9133 Mbps     0 / 7772063 ~drop/pkt
> > 0.00 ~%loss
> > rx1: 66505.9203 MB /  60.00 sec = 9298.1498 Mbps     0 / 7772683 ~drop/pkt
> > 0.00 ~%loss
> > ...
> > 
> > And here are the only non-zero interval reports (prefaced by the
> > interval number):
> > 
> > [root@chance8 ~]# grep Mbps max-40g-full-1p.log | awk '{ if ($10) print NR, $0
> > }'
> > 1307 rx1: 66505.8946 MB /  60.00 sec = 9298.1287 Mbps     1 / 7772681
> > ~drop/pkt 0.00001 ~%loss
> > 1428 tx1: 66500.3159 MB /  60.00 sec = 9297.8684 Mbps     1 / 7772029
> > ~drop/pkt 0.00001 ~%loss
> > 1598 tx1: 66503.9267 MB /  60.00 sec = 9297.7549 Mbps     1 / 7772451
> > ~drop/pkt 0.00001 ~%loss
> > 2966 tx1: 66504.6539 MB /  60.00 sec = 9297.8493 Mbps     1 / 7772536
> > ~drop/pkt 0.00001 ~%loss
> > 4781 rx1: 66507.2037 MB /  60.00 sec = 9298.3389 Mbps     4 / 7772837
> > ~drop/pkt 0.00005 ~%loss
> > 4782 tx1: 66509.2915 MB /  60.01 sec = 9297.8832 Mbps     6 / 7773083
> > ~drop/pkt 0.00008 ~%loss
> > 5658 tx1: 66499.0067 MB /  60.00 sec = 9297.6855 Mbps     1 / 7771876
> > ~drop/pkt 0.00001 ~%loss
> > 6477 rx1: 66506.7588 MB /  60.00 sec = 9298.2602 Mbps     1 / 7772782
> > ~drop/pkt 0.00001 ~%loss
> > 6946 tx1: 66505.4069 MB /  60.00 sec = 9297.9628 Mbps     1 / 7772624
> > ~drop/pkt 0.00001 ~%loss
> > 7013 rx1: 66506.8786 MB /  60.00 sec = 9298.2785 Mbps     1 / 7772796
> > ~drop/pkt 0.00001 ~%loss
> > 7014 tx1: 66504.2347 MB /  60.00 sec = 9297.7969 Mbps     4 / 7772490
> > ~drop/pkt 0.00005 ~%loss
> > 7219 rx1: 66506.4166 MB /  60.00 sec = 9298.2299 Mbps     2 / 7772743
> > ~drop/pkt 0.00003 ~%loss
> > 7220 tx1: 66503.9523 MB /  60.00 sec = 9297.7569 Mbps     2 / 7772455
> > ~drop/pkt 0.00003 ~%loss
> > 7485 rx1: 66505.8091 MB /  60.00 sec = 9298.1482 Mbps     4 / 7772674
> > ~drop/pkt 0.00005 ~%loss
> > 7486 tx1: 66504.4400 MB /  60.00 sec = 9297.8259 Mbps     3 / 7772513
> > ~drop/pkt 0.00004 ~%loss
> > 7538 tx1: 66504.3117 MB /  60.00 sec = 9297.8067 Mbps     3 / 7772498
> > ~drop/pkt 0.00004 ~%loss
> > 7539 rx1: 66507.0668 MB /  60.00 sec = 9298.3579 Mbps     4 / 7772821
> > ~drop/pkt 0.00005 ~%loss
> > 7669 rx1: 66506.6390 MB /  60.00 sec = 9298.3256 Mbps     8 / 7772775
> > ~drop/pkt 0.00010 ~%loss
> > 7670 tx1: 66503.2849 MB /  60.00 sec = 9297.6641 Mbps     7 / 7772382
> > ~drop/pkt 0.00009 ~%loss
> > 8012 tx1: 66498.4506 MB /  60.00 sec = 9296.9882 Mbps     1 / 7771811
> > ~drop/pkt 0.00001 ~%loss
> > 8215 rx1: 66502.5149 MB /  60.00 sec = 9298.1047 Mbps     1 / 7772286
> > ~drop/pkt 0.00001 ~%loss
> > 8216 tx1: 66504.4058 MB /  60.00 sec = 9297.8185 Mbps     2 / 7772508
> > ~drop/pkt 0.00003 ~%loss
> > 
> > The tx1 stream transmitted a total of:
> > 
> > [root@chance8 ~]# grep Mbps max-40g-full-1p.log | grep tx1 | awk '{ sum += $12
> > } END { print sum }'
> > 32154047281
> > 
> > packets, and lost:
> > 
> > [root@chance8 ~]# grep Mbps max-40g-full-1p.log | grep tx1 | awk '{ sum += $10
> > } END { print sum }'
> > 33
> > 
> > packets, or about a 10-9 packet loss rate, while transmitting:
> > 
> > [root@chance8 ~]# bc
> > scale=10
> > 32154047281*4*8972/10245
> > 1.0249085569
> > 
> > petabytes (so did transmit one petabyte after all).
> > 
> > The rx1 stream is very similar, transmitting a total of:
> > 
> > [root@chance8 ~]# grep Mbps max-40g-full-1p.log | grep rx1 | awk '{ sum += $12
> > } END { print sum }'
> > 32161250077
> > 
> > packets, and losing:
> > 
> > [root@chance8 ~]# grep Mbps max-40g-full-1p.log | grep rx1 | awk '{ sum += $10
> > } END { print sum }'
> > 26
> > 
> > packets, which again is about a 10-9 packet loss rate, while transmitting:
> > 
> > [root@chance8 ~]# bc
> > scale=10
> > 32161250077*4*8972/10245
> > 1.0251381457
> > 
> > petabytes.
> > 
> > So the test was somewhat successful in spite of myself.
> > 
> > -Bill