Extracting CPU and Disk information from kernel using systemtap

[Ananth N Mavinakayanahalli]

On Tue, Jul 01, 2008 at 01:59:42PM +0530, satya komaragiri wrote:
> 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.

http://sources.redhat.com/ml/systemtap/2007-q1/msg00485.html may be of
some help.

Ananth