nfs_curusec
u_quad_t nfs_curusec (void);
cur_usec = nfs_curusec();
cur_usec = nfs_curusec();
cur_usec = nfs_curusec();
rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec);
cur_usec = nfs_curusec();
cur_usec = nfs_curusec();