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Date: Sat, 12 Feb 2005 13:30:32 +0100
From: Nimnod <nimnod@gnu.univ.gda.pl>
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Subject: how to calculate CPU utilization?
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Hi,

i am looking for how to accurately calculate the CPU utilization per  
process.
i have looked through the top sources, and found out it's using the kvm  
lib, which isn't suitable for my purpose.
is there a way to accurately calculate %CPU based on information from the  
struct proc ? it does carry info on proc time (p_runtime), system, user  
and interrupt ticks, and previous system, user and int times in usec, but  
i just can't make the right equation to get the appropriate values.
first, i attempted to divide the process runtime by system uptime, which  
seemed ok, but obviously this is not the way.
could anyone please help?

rgds,
	Nimnod.