[PATCH RFC 1/4] arm64: kernel: implement DT based idle states infrastructure

Sebastian Capella sebastian.capella at linaro.org
Thu Mar 20 14:19:40 EDT 2014

On 19 March 2014 10:23, Lorenzo Pieralisi <lorenzo.pieralisi at arm.com> wrote:
> Rob is asking a property describing hw, and honestly unless we define
> a power consumption property value (defining what it means will be rather
> complicated though) I'd rather remove index altogether and use min_residency
> as a comparison value instead.

I like having a separate ranking for power to sort the states.  To me
it seems that min residency could be ambiguous for this.  We could
have states with inverted min_residencies: where a lower consumption
state has a lower target residency because the cost is recovered more
quickly.  Such a state might have higher latency for exit, so even
though the lower min_residency/lower power state is clearly
preferable, selection of the lower power state may be prevented by
kernel latency constraints.



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