On Thu, Aug 6, 2015 at 1:25 PM, Liang, Kan <kan.li...@intel.com> wrote: > >> >> >> >> +static cpumask_t power_cstate_core_cpu_mask; >> >> >> > >> >> >> > That one typically does not need a cpumask. >> >> >> > >> >> >> You need to pick one CPU out of the multi-core. But it is for >> >> >> client parts thus there is only one socket. At least this is my >> understanding. >> >> >> >> >> > >> >> > CORE_C*_RESIDENCY are available for physical processor core. >> >> > So logical processor in same physical processor core share the same >> >> > counter. >> >> > I think we need the cpumask to identify the default logical >> >> > processor which do counting. >> >> > >> >> Did you restrict these events to system-wide mode only? >> >> >> Ok, so that means that your cpumask includes one HT per physical core. >> But then, the result is not the simple aggregation of all the N/2 CPUs. > > The counter counts per physical core. The result is the aggregation of > all HT cpus in same physical core.
But then don't you need to divide by 2 to get a meaningful result? -- 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/
