cpu_frequency
total += x * 1000000000LL / cpu_frequency(curcpu());
const uint64_t pcc_freq = cpu_frequency(curcpu());
curcpu()->ci_cpu_freq = rcp->rc_psb_info.cpu_frequency;
uint64_t cpu_frequency;
uint64_t limit = gettick() + cpu_frequency(curcpu());
extern uint64_t cpu_frequency(struct cpu_info *);
tmp = (l0 - l1) * cpu_frequency(ci) / ((t1 - t0 + 1) / 2);
ld->ld_freq[cpuno++] = cpu_frequency(ci);