Re: Ondemand governor by default in etch
On Fri, Dec 08, 2006 at 06:54:33PM -0600, Gunnar Wolf wrote:
> Anthony DeRobertis dijo [Fri, Dec 08, 2006 at 06:31:55PM -0500]:
> > > * Will cause negligible impact on system performance. ondemand seems
> > > to have the philosophy of "max system speed unless I can be shown
> > > that the system is pretty much idle"
> > This isn't true on this machine here. Enabling it has the following
> > effects:
> > 1) it slows the CPU down to the point where I can watch the title
> > bars of windows redraw step-by-step when I move the mouse over them
> > 2) according to the power meter in my UPS, saves approximately 0W
> > (yes, zero) of electricity.
> > 3) lets the chip run approximately 0°C cooler.
> > (...)
> I must just repeat what you say. Of course, I cannot say how cooler or
> how much lower on electricity does this run, but my 3GHz P4 also
> dropped to 375MHz. And it was painful.
> I hand-adjusted the minimum to 1GHz, but still... I'm unsure whether
We can trivially fix that by fixing a minimum to, say, 50% or 30%.
> to leave the ondemand governor active, as it might just never go back
> to 3GHz on its own.
Are you seriously having trouble with that? I've seen it spike up
virtually instantaneously. What kernel version do you have