[gentoo-user] Getting system stats

[James]

All,

I'm writing a piece of code that requires I gather the following  
statistics every second:

- CPU Usage (as a percentage)
- NIC I/O
- Hard Drive I/O

I later have to correlate these stats as a function of time.

I'm not really sure where I should be looking to gather these  
statistics.  I know about /proc/stat, but that's only CPU related (and  
I don't think /proc/sys will give me a CPU usage percentage anyways).   
I'm not sure if there exist other proc files that will give me the  
values for NIC and hard drive I/O (such as number of transactions per  
second).

Thoughts?

Thanks!
.james
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