Messages in this thread | | | Subject | Re: [PATCH -v8][RFC] mutex: implement adaptive spinning | From | Peter Zijlstra <> | Date | Wed, 14 Jan 2009 12:42:46 +0100 |
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On Wed, 2009-01-14 at 12:41 +0100, Folkert van Heusden wrote: > > The key criteria for the busy wait is that the lock owner has to be running on > > a (different) cpu. The idea is that as long as the owner is running, there is a > > fair chance it'll release the lock soon, and thus we'll be better off spinning > > instead of blocking/scheduling. > > Won't this make Linux less "green"? (-> use more power since busy loops > use more power than idle loops) If so, maybe it should be make > configurable somewhere?
According to the 'race to idle' paradigm this would actually help making it more green, since it increases throughput.
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