Extracting CPU and Disk information from kernel using systemtap

[satya komaragiri]

Hello !

I am Satya Komaragiri, a Google Summer of Code 2008 student for The
Fedora Project &JBoss.org.

I am working on a project to Extend Bootchart to use SystemTap
( http://code.google.com/soc/2008/fedora/appinfo.html?csaid=43B0BE196B874499 )
under the guidance of my mentor Mr. Eugene Teo.

So far, I have succeeded in extracting the process information but I
need to extract the the CPU utilization, I/O wait, disk utilization
and throughput information.

I have been trying to avoid taking information from /proc and would
like to have the systemtap script gather this information directly
from the kernel.

Can anyone please suggest how to go about it? As of now, I was trying
to look into the kernel code to see how the /proc entries are filled
in the first place.

Regards,
Satya