How to get CPU utilization

[Haidong X. <hd...@ho...>]

Hi, all,

How could I get CPU utilization by running OProfile?

The actual problem I need to solve is to measure the CPU utilization of a 
server (FreeRadius) when there is one client authenticating, so that I need 
deduce how many clients the server can support simultaneously. When the 
authentication starts, I need to clock the CPU cycles used for this 
authentication and the idle cycles during this period.

I read some papers which show the result about CPU Idle time, but I really 
could not figure out how to get the CPU Cycles and CPU Idle cycles during 
the profiling. Since this is my first time to use OProfile, I really don't 
know how to solve it.

Could anybody give me any hints?  I feel sorry, if this question is silly.

Thank you
Haidong

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