Hi,<br><br>I am newbie to netperf.<br>I ran following command<br>$ /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<br><br>And obtained following output (please see below). Can you please explain me following ?<br>
1) Why there is a warning about desired "Confidence level" ?<br>2) When I include -c LOC_CPU -C REM_CPU I get details about "utilization" and "Service Demand" . What do they represent ?<br>
Do they represent local and remote CPU utilization ?<br>3) How max and min number of iterations are actually used ?<br>4) Actually I want to measure throughput vs CPU Load for my system.<br> What is the best command for the above purpose ?<br>
5) Do I need to use a crossover cable for the test setup ?<br>6) Can I have multiple servers and one client ? Or multiple client and one server setup ?<br> <br><br>==================================================<br>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. <br>
!!! WARNING<br>!!! Desired confidence was not achieved within the specified iterations.<br>
!!! This implies that there was variability in the test environment that<br>!!! must be investigated before going further.<br>!!! Confidence intervals: Throughput : 1.164%<br>!!! Local CPU util : 0.000%<br>
!!! Remote CPU util : 56.955%<br><br>Recv Send Send Utilization Service Demand<br>Socket Socket Message Elapsed Send Recv Send Recv<br>
Size Size Size Time Throughput local remote local remote<br>
bytes bytes bytes secs. 10^6bits/s % S % S us/KB us/KB<br><br> 65536 65536 1 5.00 9.46 100.00 59.60 865.994 516.212 <br>==============================================================<br>
<br>Thanks for your help,<br>Steevan<br>