NSEC_IN_SEC
ts->tv_sec = uptime / NSEC_IN_SEC;
ts->tv_nsec = uptime % NSEC_IN_SEC;
first_in_ns = (((first >> 32) * NSEC_IN_SEC) +
(((uint64_t)NSEC_IN_SEC * (uint32_t)first) >> 32));
sc->et.et_frequency = NSEC_IN_SEC;
sc->tc.tc_frequency = NSEC_IN_SEC;