cpufreq in the power manager

Robby Workman rw at rlworkman.net
Fri Sep 18 06:16:57 CEST 2009

On Thu, 17 Sep 2009 20:05:55 -0700
Auke Kok <sofar at foo-projects.org> wrote:

> Yves-Alexis Perez wrote:
> > Liviu Andronic a écrit :
> >> The ondemand governor is without doubt the default one to go. In my
> >> specific case, however, sometimes I need to go more conservative
> >> than that.
> >> Liviu
> > 
> > That's exactly the point :) 
> There is nothing more conservative than ondemand. the conservative 
> governor has shown to burn more power, make your cpu hotter and save
> you less power than the ondemand governor.

I'm preaching to the choir here, and I'm not completely convinced
that this analogy is exactly correct, but I generally explain to
our users like this:

If you spill a bag of jelly beans, you can be conservative with your
"cycles" by picking them up one at a time and delivering them to the
trash can, or you can pick up as many as will fit in your hand,
deliver them to the trash can, and repeat until they're all picked
up and thrown away.  Working a bit harder for a *much* shorter time
period ultimately is easier (i.e. uses less energy) than working 
less hard over a longer time period.

Feel free to pick it apart :-)

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