On Thu, 07.11.13 18:21, Elad Alfassa (elad(a)fedoraproject.org) wrote:
> The last time I discussed this with Matthew Garrett we came to
the
> conclusion that this isn't something we want for the general case. Best
> is to ping him about this.
>
> I am pretty sure that "tuned" is nothing we ever want to ship by
> default. To "tune" something is the opposite of having good defaults. We
> want good defaults, no tuning.
What about automatically changing the cpu-governor to powersave when
battery is under certain % and the device is unplugged, and then bringing
it back to ondemand when plugging the machine back in?
Just because something is called "powersave" it doesn't mean something
actually saves more power. ;-)
As far as I followed the discussions most people these days believe that
the default governor is best for all cases. (Doing something quickly on
a fast CPU appears not to be worse when it comes to power consumption
than doing it for a longer timer on a slow CPU... Not totally
surprising, is it?) [1]
Fiddling with userspace configuration of CPU governors is something for
Gentoo --omg-optimized folks...
http://funroll-loops.info/
For everything else on this topic I defer to Matthew, he obviously has
more of a clue on this than I do.
Lennart
[1] Well, modulo the case where they are totally broken... As they just were...
--
Lennart Poettering, Red Hat