logging server C-state time?

logging server C-state time?

[Chris Snook]

Hey folks --

I'm interested in logging the amount of time that server CPUs spend in various 
C-states over the course of a complicated job, ideally in a manner I could sync 
up with output from sysstat tools.  So far all the tools I've seen for power 
monitoring seem to be targeted to laptops and interactive use, but I'm looking 
for something that's scriptable and doesn't need ACPI battery information, even 
if that means relying on indirect measurements of power use like C-states.  Any 
suggestions?

-- Chris

Re: logging server C-state time?

[Arjan van de Ven]

On Mon, 03 Nov 2008 14:47:52 -0500
Chris Snook <csnook@redhat.com> wrote:

> Hey folks --
> 
> I'm interested in logging the amount of time that server CPUs spend
> in various C-states over the course of a complicated job, ideally in
> a manner I could sync up with output from sysstat tools.  So far all
> the tools I've seen for power monitoring seem to be targeted to
> laptops and interactive use, but I'm looking for something that's
> scriptable and doesn't need ACPI battery information, even if that
> means relying on indirect measurements of power use like C-states.
> Any suggestions?

powertop gives you the C state information accumulated over time...
just look at the code how it does that ;)


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org