cpufreqd as standard install?

Matthew Garrett mjg59 at srcf.ucam.org
Thu Mar 8 14:47:17 UTC 2012

On Mon, Mar 05, 2012 at 09:39:34PM -0500, Phillip Susi wrote:

> With correct frequency management, the lower power per instruction of 
> the lower frequencies outweighs the reduced time in the lower C 
> states.

This is (broadly speaking) untrue. There's a bunch of fixed costs that a 
naive P=IVĀ² doesn't take into account. Assuming a fixed amount of work, 
race to idle is almost always the most power efficient strategy.

Matthew Garrett | mjg59 at srcf.ucam.org

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