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

Alan Cox
2005-07-11T13:26:29Z

> > Because some machines exhibit appreciable latency in entering low power
> > state via ACPI, and 1000Hz reduces their battery life. By about half,
> > iirc.
> >
> Then the owners of such machines can use HZ=250 and leave the default
> alone. Why should everyone have to bear the cost?

They need 100 really it seems, 250-500 have no real effect and on the
Dell I tried 250 didn't stop the wild clock slew from the APM bios
either. I played with this a fair bit on a couple of laptops. I've not
seen anything > 20% saving however so I've no idea who/why someone saw
50%