[netperf-talk] Help me to understand the results

[Steevan Rodrigues]

Hi,

I am newbie to netperf.
I ran following command
$ /usr/local/bin/netperf -l 5 -H 192.168.11.207 -t TCP_STREAM -c LOC_CPU -C
REM_CPU -i 10,2 -I 95,3 -- -m 1 -s 32768 -S 32768

And obtained following output (please see below). Can you please explain me
following ?
1) Why there is a warning about desired "Confidence level" ?
2) When I include -c LOC_CPU  -C REM_CPU  I get  details about "utilization"
and "Service Demand" . What do they represent ?
Do they represent local and remote CPU utilization ?
3) How max and min number of iterations are actually used ?
4) Actually I want to measure throughput vs CPU Load for my system.
   What is the best command for the above purpose ?
5) Do I need to use a crossover cable for the test setup ?
6) Can I have multiple servers and one client ? Or multiple client and one
server setup ?


==================================================
TCP STREAM TEST from 0.0.0.0 (0.0.0.0) port 0 AF_INET to 192.168.11.207
(192.168.11.207) port 0 AF_INET : +/-1.500% @ 95% conf.
!!! WARNING
!!! Desired confidence was not achieved within the specified iterations.
!!! This implies that there was variability in the test environment that
!!! must be investigated before going further.
!!! Confidence intervals: Throughput      : 1.164%
!!!                       Local CPU util  : 0.000%
!!!                       Remote CPU util : 56.955%

Recv   Send     Send
Utilization       Service Demand
Socket Socket  Message  Elapsed                     Send     Recv
Send    Recv
Size     Size     Size           Time     Throughput    local    remote
local   remote
bytes    bytes   bytes         secs.    10^6bits/s      % S      % S
us/KB   us/KB

 65536  65536      1             5.00          9.46        100.00   59.60
865.994  516.212
==============================================================

Thanks for your help,
Steevan
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