On 8/17/2012 11:41 AM, Matthew Garrett wrote: > On Thu, Aug 16, 2012 at 07:01:25AM -0700, Arjan van de Ven wrote: >>> *Power policy*: >>> >>> So how is power policy different? As Peter says,'pack more than spread >>> more'. >> >> this is ... a dubiously general statement. >> >> for good power, at least on Intel cpus, you want to spread. Parallelism is >> efficient. > > Is this really true? In a two-socket system I'd have thought the benefit > of keeping socket 1 in package C3 outweighed the cost of keeping socket > 0 awake for slightly longer.
not on Intel you can't enter package c3 either until every one is down. (e.g. memory controller must stay on etc etc) -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
