Re: [RFC PATCH] PM: Introduce generic DVFS framework with device-specific OPPs

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Hi Greg,

I think DVFS here means “Dynamic voltage and frequency scaling”,  refering the first google's result:

a dynamic voltage and frequency scaling (DVFS) *technique that minimizes the total system energy
consumption for performing a task while satisfying a given execution time constraint. We first show that in order to
guarantee minimum energy for task execution by using DVFS it is essential to divide the system power into active and
standby power components. Next, we present a new DVFS technique, which considers not only the active power, but also
the standby component of the system power.

It's widely used in embeded Soc.

Best regards,
Zhang Jiejing


2011/4/26 Greg KH <gregkh@xxxxxxx>
On Tue, Apr 26, 2011 at 05:43:21PM +0900, MyungJoo Ham wrote:
> With OPPs, a device may have multiple operable frequency and voltage
> sets. However, there can be multiple possible operable sets and a system
> will need to choose one from them. In order to reduce the power
> consumption (by reducing frequency and voltage) without affecting the
> performance too much, a DVFS scheme may be used.

What is "DVFS"?  A new filesystem?

confused,

greg k-h
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