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    SubjectRe: cpuidle asymmetry (was Re: [RFC PATCH V4 5/5] cpuidle: cpuidle driver for apm)
    > > Moorestown is already an example of an asymmetric system,
    > > since its deepest c-state is available on cpu0, but not on cpu1.
    > > So it needs different tables for each cpu.
    > wtf are these hardware guys smoking and how the heck are we supposed to
    > schedule on such a machine? Prefer to keep cpu1 busy while idling cpu0?

    they are smoking micro-amps:-)

    S0i3 on cpu0 can be entered only after cpu1 is already off-line,
    among other system hardware dependencies...

    So it makes no sense to export S0i3 as a c-state on cpu1.

    When cpu1 is online, the scheduler treats it as a normal SMP.

    -Len Brown, Intel Open Source Technology Center

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