tu_iticks
p->p_tu.tu_uticks = p->p_tu.tu_sticks = p->p_tu.tu_iticks = 0;
p->p_tu.tu_uticks, p->p_tu.tu_sticks, p->p_tu.tu_iticks);
tu->tu_iticks += tmp.tu_iticks;
p->p_tu.tu_uticks = p->p_tu.tu_sticks = p->p_tu.tu_iticks = 0;
it = tup->tu_iticks;
(kp)->p_iticks = (tu)->tu_iticks; \