[netperf-talk] Some question about CPU utilization

[Benjamin Thery]

Hi,

I'm using netperf to do some network benchmarking on Linux and
I have some questions regarding CPU utilization.

Very often, um... most of the time, when I run netperf I get the
"!!! WARNING, Desired confidence was not achieved within the specified
iterations.". It's _always_ due to variations in CPU util.

What can I do to stabilize the CPU util on my host?
Are there some known tricks?
Should I increase the number of iterations or the duration of the test?

Here are some additional informations:

I run netperf with the following options : -I 95,10 -i 10,2
and I set the test duration to 40 seconds.

CPU util is measured between 1 and 2% (very low CPU load).

My test machine is a bi-processor dual-core Xeon 5130 2GHz.

I tried to run CPU_LOC test.
It returns immediatly and givethe value 100.
(I thought I read in the manual this test should last 40 sec?)


Thanks for the help.

Benjamin

-- 
B e n j a m i n   T h e r y  - BULL/DT/Open Software R&D

    http://www.bull.com