NSEC_PER_USEC
(s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
(s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
(s64)ts.tv_sec, ts.tv_nsec / NSEC_PER_USEC);
NSEC_PER_USEC),
return k + (us * NSEC_PER_USEC);
return k / NSEC_PER_USEC;