[PATCH 0/3] coupled cpuidle state support

Arjan van de Ven arjan at linux.intel.com
Wed Dec 21 14:36:12 EST 2011


>>
>> .. or it enters WFI, and a physical device sends it an interrupt,
>> at which point it exits.
> 
> None of the cpus will return to the idle loop until all cpus have
> decremented the ready counter back to 0, so they can't wrap around
> again.


yikes, so you IPI all the cpus on the first exit.
that must burn power ;-(



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