td->usr_time += mtime_since(&td->ru_start.ru_utime, &td->ru_end.ru_utime);
td->sys_time += mtime_since(&td->ru_start.ru_stime, &td->ru_end.ru_stime);
td->ctx += td->ru_end.ru_nvcsw + td->ru_end.ru_nivcsw - (td->ru_start.ru_nvcsw + td->ru_start.ru_nivcsw);
-
memcpy(&td->ru_start, &td->ru_end, sizeof(td->ru_end));
}