uncore_pmu_to_box
box = uncore_pmu_to_box(pmu, event->cpu);
box = uncore_pmu_to_box(uncore_pmu, smp_processor_id());
box = uncore_pmu_to_box(uncore_pmu, smp_processor_id());
struct intel_uncore_box *uncore_pmu_to_box(struct intel_uncore_pmu *pmu, int cpu);
box = uncore_pmu_to_box(pmu, event->cpu);