Messages in this thread | | | Date | Wed, 07 Sep 2005 07:28:44 -0700 | From | "Martin J. Bligh" <> | Subject | Re: Hugh's alternate page fault scalability approach on 512p Altix |
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> Anticipatory prefaulting raises the highest fault rate obtainable three-fold > through gang scheduling faults but may allocate some pages to a task that are > not needed.
IIRC that costed more than it saved, at least for forky workloads like a kernel compile - extra cost in zap_pte_range etc. If things have changed substantially in that path, I guess we could run the numbers again - has been a couple of years.
M.
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