Messages in this thread | | | Date | Tue, 02 Aug 2005 09:10:21 -0400 | From | Stephen Clark <> | Subject | Re: Power consumption HZ100, HZ250, HZ1000: new numbers |
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James Bruce wrote:
>Theodore Ts'o wrote: > > On Mon, Aug 01, 2005 at 12:18:18PM -0400, James Bruce wrote: > >>The tradeoff is a realistic 4.4% power savings vs a 300% increase in > >>the minimum sleep period. A user will see zero power savings if they > >>have a USB mouse (probably 99% of desktops). On top of that, we can > ^^^^^^^^ > > > Most laptops (including mine, a Thinkpad T40) use a PS/2 mouse. So in > > the places where power consumption savins matters most, it's usually > > quite possible to function without needing any USB devices. The 90% > > figure isn't at all right; in fact, it may be that over 90% of the > > laptops still use PS/2 mice and keyboards. > >Yes, laptops are mostly PS/2, which is why I only claimed a statistic >for desktops. Desktops pretty much all use USB mice now. If 250Hz were >only being sold as an option for laptops, we could leave it at that, yet >its being pushed as a default that's "good for everyone". For desktops >this is not currently true at all. By the time USB is fixed to do power >saving, we'll probably have a working tick-skipping patch which makes >the whole HZ argument moot. > > - Jim Bruce > > > Maybe new desktop systems - but what about the tens of millions of old systems that don't.
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