| Version 1 (modified by , 13 years ago) (diff) |
|---|
Continuation Round 5
In this round, I ran plastic-105 and plastic-106 for about an hour, with only GT and Wisconsin, to try to track down some issues with performance in Round 3 that seemed related to GT. In particular, we wanted to find out whether there was any difference when GT was sending data vs receiving data.
The raw logs are at http://www.gpolab.bbn.com/plastic-slices/continuation/round-5/.
plastic-105
SteadyPerf TCP, using port=5105, time=518400, and this table of client/server pairs:
| client | server | server address |
| wings-openflow-2.wail.wisc.edu | plnode1.cip.gatech.edu | server=10.42.105.100 |
| wings-openflow-3.wail.wisc.edu | plnode2.cip.gatech.edu | server=10.42.105.101 |
One-time prep commands run on each client and server
sudo yum -y install iperf
Commands run on each server
server=<ipaddr> nice -n 19 iperf -B $server -p 5105 -s -i 1
Commands run on each client
server=<ipaddr> nice -n 19 iperf -c $server -p 5105 -t 518400
Results
Generated with
subnet=105
for host in $(awk 'NR%2==1' ~/plastic-slices/logins/logins-plastic-$subnet.txt | sed -r -e 's/.+@//') ; do echo -e "$host:\n\n{{{" ; grep -A 5 -B 1 "Client connecting" pgenigpolabbbncom_plastic$subnet\@$host.log ; echo -e "}}}\n" ; done
and then edited slightly to remove artifacts (like control characters, my prompt, etc).
wings-openflow-2.wail.wisc.edu:
------------------------------------------------------------ Client connecting to 10.42.105.100, TCP port 5105 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 3] local 10.42.105.95 port 55411 connected with 10.42.105.100 port 5105 [ ID] Interval Transfer Bandwidth [ 3] 0.0-4904.3 sec 1.19 GBytes 2.09 Mbits/sec
wings-openflow-3.wail.wisc.edu:
------------------------------------------------------------ Client connecting to 10.42.105.101, TCP port 5105 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 3] local 10.42.105.96 port 52296 connected with 10.42.105.101 port 5105 [ ID] Interval Transfer Bandwidth [ 3] 0.0-4903.6 sec 1.18 GBytes 2.06 Mbits/sec
Analysis
Not great numbers, but a factor of seven or eight times better than the other direction. This smells like a duplex problem to me -- remember that traffic is sent from the client to the server, in iperf.
plastic-106
SteadyPerf UDP, using port=5106, time=518400, rate=30, and this table of client/server pairs:
| client | server | server address |
| wings-openflow-2.wail.wisc.edu | plnode2.cip.gatech.edu | server=10.42.105.101 |
| wings-openflow-3.wail.wisc.edu | plnode1.cip.gatech.edu | server=10.42.105.100 |
One-time prep commands run on each client and server
sudo yum -y install iperf
Commands run on each server
server=<ipaddr> nice -n 19 iperf -u -B $server -p 5106 -s -i 1
Commands run on each client
server=<ipaddr> nice -n 19 iperf -u -c $server -p 5106 -t 518400 -b 30M
Results
Generated with
subnet=106
for host in $(awk 'NR%2==1' ~/plastic-slices/logins/logins-plastic-$subnet.txt | sed -r -e 's/.+@//') ; do echo -e "$host:\n\n{{{" ; grep -A 10 -B 1 "Client connecting" pgenigpolabbbncom_plastic$subnet\@$host.log ; echo -e "}}}\n" ; done
and then edited slightly to remove artifacts (like control characters, my prompt, etc).
wings-openflow-2.wail.wisc.edu:
------------------------------------------------------------ Client connecting to 10.42.105.101, UDP port 5106 Sending 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 10.42.105.95 port 50439 connected with 10.42.105.101 port 5106 [ ID] Interval Transfer Bandwidth [ 3] 0.0-4900.4 sec 17.1 GBytes 30.0 Mbits/sec [ 3] Sent 12501122 datagrams [ 3] Server Report: [ 3] 0.0-4899.9 sec 17.1 GBytes 30.0 Mbits/sec 0.613 ms 6997/12501121 (0.056%) [ 3] 0.0-4899.9 sec 161 datagrams received out-of-order
wings-openflow-3.wail.wisc.edu:
------------------------------------------------------------ Client connecting to 10.42.105.100, UDP port 5106 Sending 1470 byte datagrams UDP buffer size: 110 KByte (default) ------------------------------------------------------------ [ 3] local 10.42.105.96 port 48014 connected with 10.42.105.100 port 5106 [ ID] Interval Transfer Bandwidth [ 3] 0.0-4903.0 sec 17.1 GBytes 30.0 Mbits/sec [ 3] Sent 12507660 datagrams [ 3] Server Report: [ 3] 0.0-4902.8 sec 17.1 GBytes 30.0 Mbits/sec 0.852 ms 9669/12507659 (0.077%) [ 3] 0.0-4902.8 sec 344 datagrams received out-of-order
Analysis
Not perfect, but three nines isn't bad. A significant difference over the other direction, anyway.
