Update on DeviceKit

Matthew Garrett mjg59 at srcf.ucam.org
Thu May 8 08:07:39 PDT 2008


On Thu, May 08, 2008 at 04:53:00PM +0200, Holger Macht wrote:
> On Thu 08. May - 15:46:00, Matthew Garrett wrote:
> > On desktop systems, nothing other than ondemand ever makes sense. 
> > There's already a kernel knob for setting maximum latency, but right now 
> > I believe it only takes C states into account. You're guaranteed to get 
> > code running within that window, it just makes no guarantees about what 
> > speed the CPU will be running at or how long it'll take to ramp up.
> 
> So it would even make sense to not export "setting the governor", but just
> a performance scale. This way, you could even set the governor behind the
> interface if it requests full/medium/low performance.

I can only reiterate than on desktop systems, nothing other than 
ondemand ever makes sense. Performance and conservative are just 
different ways of asking the system to waste power.
-- 
Matthew Garrett | mjg59 at srcf.ucam.org


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