Messages in this thread | | | Date | Tue, 13 Nov 2012 13:56:45 -0800 | From | Arjan van de Ven <> | Subject | Re: [PATCH 3/3] PM: Introduce Intel PowerClamp Driver |
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On 11/13/2012 1:16 PM, Paul E. McKenney wrote: > On Mon, Nov 12, 2012 at 02:03:51PM -0800, Jacob Pan wrote: >> Intel PowerClamp driver performs synchronized idle injection across >> all online CPUs. The goal is to maintain a given package level C-state >> ratio. >> >> Compared to other throttling methods already exist in the kernel, >> such as ACPI PAD (taking CPUs offline) and clock modulation, this is often >> more efficient in terms of performance per watt. >> >> Please refer to Documentation/thermal/intel_powerclamp.txt for more details. > > If I read this correctly, this forces a group of CPUs into idle for > about 600 milliseconds at a time. This would indeed delay grace periods,
6ms not 600
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