Messages in this thread | | | Date | Tue, 21 Aug 2012 08:21:52 -0700 | From | Arjan van de Ven <> | Subject | Re: [discussion]sched: a rough proposal to enable power saving in scheduler |
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>>> A modern kernel better know what state the system is in: on >>> battery or on AC power. >> >> That's a fundamentally uninteresting thing for the kernel to >> know about. [...] > > I disagree.
and I'll agree with Matthew and disagree with you ;-)
> >> [...] AC/battery is just not an important power management >> policy input when compared to various other things. > > Such as? > > The thing is, when I use Linux on a laptop then AC/battery is > *the* main policy input.
I think you're wrong there. First of all, not the whole world is a laptop. Phones and servers are very different than laptops in this sense. In a phone, when you're charging, you want to be EXTRA power efficient in many ways (since charging creates heat, and that heat will take away your thermal budget). In a datacenter, you're either on AC or DC all the time, and power efficiency still matters.
And even on a laptop.. heat production matters even when on AC... laptops are more and more like phones that way.
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