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Code Issues Releases Wiki Activity

Correct RTT Variation

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v2ray 2016-06-25 22:10:17 +02:00
parent 25ef62434a
commit 882746380e
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GPG Key ID: 7251FFA14BB18169
1 changed files with 4 additions and 4 deletions
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8
transport/internet/kcp/kcp.go
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@ -139,7 +139,7 @@ type KCP struct {
conv, mtu, mss, state uint32 conv, mtu, mss, state uint32
snd_una, snd_nxt, rcv_nxt uint32 snd_una, snd_nxt, rcv_nxt uint32
ts_recent, ts_lastack, ssthresh uint32 ts_recent, ts_lastack, ssthresh uint32
rx_rttval, rx_srtt, rx_rto uint32 rx_rttvar, rx_srtt, rx_rto uint32
snd_wnd, rcv_wnd, rmt_wnd, cwnd, probe uint32 snd_wnd, rcv_wnd, rmt_wnd, cwnd, probe uint32
current, interval, ts_flush, xmit uint32 current, interval, ts_flush, xmit uint32
updated uint32 updated uint32
@ -272,19 +272,19 @@ func (kcp *KCP) update_ack(rtt int32) {
var rto uint32 = 0 var rto uint32 = 0
if kcp.rx_srtt == 0 { if kcp.rx_srtt == 0 {
kcp.rx_srtt = uint32(rtt) kcp.rx_srtt = uint32(rtt)
kcp.rx_rttval = uint32(rtt) / 2 kcp.rx_rttvar = uint32(rtt) / 2
} else { } else {
delta := rtt - int32(kcp.rx_srtt) delta := rtt - int32(kcp.rx_srtt)
if delta < 0 { if delta < 0 {
delta = -delta delta = -delta
} }
kcp.rx_rttval = (3*kcp.rx_rttval + uint32(delta)) / 4 kcp.rx_rttvar = (3*kcp.rx_rttvar + uint32(delta)) / 4
kcp.rx_srtt = (7*kcp.rx_srtt + uint32(rtt)) / 8 kcp.rx_srtt = (7*kcp.rx_srtt + uint32(rtt)) / 8
if kcp.rx_srtt < 1 { if kcp.rx_srtt < 1 {
kcp.rx_srtt = 1 kcp.rx_srtt = 1
} }
} }
rto = kcp.rx_srtt + _imax_(kcp.interval, 4*kcp.rx_rttval) rto = kcp.rx_srtt + _imax_(kcp.interval, 4*kcp.rx_rttvar)
if rto > IKCP_RTO_MAX { if rto > IKCP_RTO_MAX {
rto = IKCP_RTO_MAX rto = IKCP_RTO_MAX
} }