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 -- 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/