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Show First 20 Lines • Show All 6,360 Lines • ▼ Show 20 Lines	if (tp->t_srtt != 0) {
* No rtt measurement yet - use the unsmoothed rtt. Set the		* No rtt measurement yet - use the unsmoothed rtt. Set the
* variance to half the rtt (so our first retransmit happens		* variance to half the rtt (so our first retransmit happens
* at 3*rtt).		* at 3*rtt).
*/		*/
tp->t_srtt = rtt_ticks << TCP_RTT_SHIFT;		tp->t_srtt = rtt_ticks << TCP_RTT_SHIFT;
tp->t_rttvar = rtt_ticks << (TCP_RTTVAR_SHIFT - 1);		tp->t_rttvar = rtt_ticks << (TCP_RTTVAR_SHIFT - 1);
}		}
KMOD_TCPSTAT_INC(tcps_rttupdated);		KMOD_TCPSTAT_INC(tcps_rttupdated);
		if (tp->t_rttupdated < UCHAR_MAX)
tp->t_rttupdated++;		tp->t_rttupdated++;
#ifdef STATS		#ifdef STATS
stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RTT, imax(0, rtt_ticks));		stats_voi_update_abs_u32(tp->t_stats, VOI_TCP_RTT, imax(0, rtt_ticks));
#endif		#endif
/*		/*
* the retransmit should happen at rtt + 4 * rttvar. Because of the		* the retransmit should happen at rtt + 4 * rttvar. Because of the
* way we do the smoothing, srtt and rttvar will each average +1/2		* way we do the smoothing, srtt and rttvar will each average +1/2
* tick of bias. When we compute the retransmit timer, we want 1/2		* tick of bias. When we compute the retransmit timer, we want 1/2
* tick of rounding and 1 extra tick because of +-1/2 tick		* tick of rounding and 1 extra tick because of +-1/2 tick
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