TCP_RTT_SHIFT
(TCP_RTT_SHIFT + TCP_RTT_BASE_SHIFT))) {
(tp->t_srtt >> TCP_RTT_SHIFT);
tp->t_srtt = (rtt + 1) << (TCP_RTT_SHIFT + TCP_RTT_BASE_SHIFT);
tp->t_rttvar += (tp->t_srtt >> TCP_RTT_SHIFT);
(TCP_RTT_SHIFT + TCP_RTT_BASE_SHIFT);
((((tp)->t_srtt >> TCP_RTT_SHIFT) + (tp)->t_rttvar) \