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List:       linux-thinkpad
Subject:    Re: [ltp] Re: this script controles on my t60 the cpufunctions i use
From:       Michael Olbrich <michael.olbrich () gmx ! net>
Date:       2006-08-18 7:20:58
Message-ID: 20060818072058.GB25716 () creature ! apm ! etc ! tu-bs ! de
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On Thu, Aug 17, 2006 at 07:57:03PM +0200, Evgeni Golov wrote:
> On Wed, 16 Aug 2006 15:02:29 +0200 Michael Olbrich
> <michael.olbrich@gmx.net> wrote:
> 
> > On Wed, Aug 16, 2006 at 11:29:15AM +0100, Alfredo Matos wrote:
> > > So this enables and disables the second core.
> > > You do this for powersave reasons i presume. Do you have a notion
> > > of the battery gain, i mean, how much more (in minutes) are you
> > > able to squeeze out of the battery ?
> > 
> > I have a Z61m but I think the CPU is more or less the same.
> > When switching from 2 CPUs at 1GHz (minimum frquency) to 1 CPU at 1GHz
> > the average power consumption drops by 2W. How much that is in minutes
> > depends on the rest of the system. For me that's about 30 minutes.
> 
> How do you check this?
> cat /proc/acpi/battery/BAT0/state
> shows me ~19W, with one and two cores enabled.

For me it drops by ~2W when I disable the second core.

michael


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