[PATCH v2] Add cpuidle support for at91
w.sang at pengutronix.de
Fri Oct 2 04:46:03 EDT 2009
> In other words, only state "wait-for-interrupt *and* RAM self refresh"
> brings some more power saving. Indeed, cpu_do_idle() that correspond to
> the "WFI" state was already the way of dealing with idle cpu, even
> without your patch. Am I correct ?
Yes, but it has a higher exit latency. Those data is provided to the cpuidle
framework, so it can decide which state to use.
I wonder if other people can confirm a similar amount of power savings? I am
trying to implement the RAM self refresh for i.MX and don't see much
improvment. I guess I still do something wrong...
Pengutronix e.K. | Wolfram Sang |
Industrial Linux Solutions | http://www.pengutronix.de/ |
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