Re: [PATCH] i386: Selectable Frequency of the Timer Interrupt

Pavel Machek
2005-07-16T13:51:41Z

Hi!

> > Alan tested it and said that 250HZ does not save much power anyway.
>
> Len Brown, a year ago: "The bottom line number to laptop users is battery
> lifetime. Just today somebody complained to me that Windows gets twice the
> battery life that Linux does."
>
> And "Maybe I can get Andy Grover over in the moble lab to get some time on
> that fancy power measurement setup they have...
>
> "My expectation is if we want to beat the competition, we'll want the
> ability to go *under* 100Hz."
>
> But then, power consumption of the display should preponderate, so it's not
> clear.
>
> Len, any updates on the relationship between HZ and power consumption?

Last time I checked, HZ=100 to HZ=1000 difference was about 1W, about
twice as much as disk spinning up vs. disk spinned down.
Pavel
--
teflon -- maybe it is a trademark, but it should not be.