powerd adaptive mode latching

Igor Mozolevsky igor at hybrid-lab.co.uk
Sat Jan 12 15:26:49 PST 2008

On 12/01/2008, Maxim Sobolev <sobomax at digifonica.com> wrote:
> I wonder if somebody did measurement of power consumption with powerd
> and without it on typical tasks. There is very interesting idea in the
> last issue of ACM Queue that it might be much more beneficial to run CPU
> at the full speed and then switch it to low-power mode as soon as
> possible in the idle loop than to run longer at reduced speed for a
> longer period of time.

That's a pretty neat idea, and will certainly get rid of the polling
issue. The scheduler could scale the cpu clock, but I presume it would
require some hacking effort...


More information about the freebsd-current mailing list