ITIMER_PROF
if (timevalisset(&pstats->p_timer[ITIMER_PROF].it_value)) {
if (itimerdecr(&pstats->p_timer[ITIMER_PROF],
timevalisset(&pstats->p_timer[ITIMER_PROF].it_value)))
if (which > ITIMER_PROF)
if (which > ITIMER_PROF)