On Fri, Aug 17, 2012 at 01:45:09PM -0600, Chris Friesen wrote: > On 08/17/2012 12:47 PM, Matthew Garrett wrote:
> The datasheet for the Xeon E5 (my variant at least) says it doesn't > do C7 so never powers down the LLC. However, as you said earlier > once you can put the socket into C6 which saves about 30W compared > to C1E. > > So as far as I can see with this CPU at least you would benefit from > shutting down a whole socket when possible. Having any active cores on the system prevents all packages from going into PC6 or deeper. What I'm not clear on is whether less deep package C states are also blocked. -- Matthew Garrett | mj...@srcf.ucam.org -- 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/
