Messages in this thread | | | Date | Wed, 25 Sep 2013 18:15:21 -0700 | From | Arjan van de Ven <> | Subject | Re: [Results] [RFC PATCH v4 00/40] mm: Memory Power Management |
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On 9/25/2013 4:47 PM, Andi Kleen wrote: >> Also, the changelogs don't appear to discuss one obvious downside: the >> latency incurred in bringing a bank out of one of the low-power states >> and back into full operation. Please do discuss and quantify that to >> the best of your knowledge. > > On Sandy Bridge the memry wakeup overhead is really small. It's on by default > in most setups today.
btw note that those kind of memory power savings are content-preserving, so likely a whole chunk of these patches is not actually needed on SNB (or anything else Intel sells or sold)
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