[ltp] Time spent in C3 cpu state ?

[Jeffrey L. Taylor]

Quoting Josh Battles <josh.lists@omg-stfu.com>:
> Brad Langhorst said:
> > On Tue, 2005-08-09 at 10:02 -0500, Josh Battles wrote:
> >> Damien Challet said:
> >> > Hi,
> >> >
> >> > Just wondering, what is the fraction of the time your thinkpad spends in
> >> C3
> >> > cpu state ?
> >> >
> >> > My own stats:
> >> >
> >> > T41 2373-GEG: 50%, x21 and 600E with PIII@450MHz: 85%
> >> >
> >> > Is there any way to improve the usage of C3 ?
> >>
> >> Please excuse my ignorance, but isn't C3 a low-power idle state?  Wouldn't
> >> it
> >> only be in this state if you have it suspended or something?
> >
> > you're getting confused between  S3 and C3.
> >
> > brad
> 
> Are they not both ACPI suspend to ram states?
> 

C3 is a low power, active state.  My laptop spends most of its powered
up time in the C3 state.  Look in /proc/acpi/processor/CPU

HTH,
  Jeffrey