Re: [PATCH kvm-unit-tests] pmu: fixes for Sandy Bridge hosts

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Il 03/06/2013 09:38, Gleb Natapov ha scritto:
>> > Turbo boost could also contribute to lowering the number of cycles; a
>> > boosted processor has ref cpu cycles that are _longer_ than the regular
>> > cycles (thus they count in smaller numbers).  Maybe that's why "core
>> > cycles" didn't go below N.
>> > 
> "core cycles" are subject to Turbo boost changes, not ref cycles. Since
> instruction are executed at core frequency ref cpu cycles count may be
> indeed smaller.

Yes, that's what I was trying to say. :)

Paolo

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