[ltp] Recommended maximum frequency

Henrique de Moraes Holschuh linux-thinkpad@linux-thinkpad.org
Tue, 2 Dec 2008 10:22:52 -0200


On Tue, 02 Dec 2008, Tino Keitel wrote:
> On Tue, Dec 02, 2008 at 12:21:55 +0100, Yves-Alexis Perez wrote:
> > On lun, 2008-12-01 at 22:40 +0100, Tino Keitel wrote:
> > > I remember to read somewhere that newer Intel chipsets have a feature
> > > to boost the frequency somewhat beyond the normal maximum, which
> > > consumes more power, but also gains a few percent of performance.
> > > Could
> > > it be that the 1601000 frequency is provided by this feature? If yes,
> > > would it be recommended to limit the maximum to 1600000 if power
> > > saving
> > > is desired?
> > 
> > Just set the governor to ondemand and let the system decide.
> 
> That's how I do it currently. I just wondered if those few extra Hz are
> bought with a much higher power consumption compared to 1600000, so
> that it would be a good idea to set the maximum frequency to 1600000.
> 
> Maybe I should make some measurements for the CPU temperatures with
> 1600000 and 1601000.

Also, you can get information of such details in the processor datasheet.
Intel has all of them online, and /proc/cpuinfo should be able to give you
enough information to identify the procesor in your thinkpad.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh