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rename defaultTCPMSS to maxDatagramSize

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This commit is contained in:
Marten Seemann 2020-01-22 14:54:05 +07:00
parent 31e4691ffd
commit d4de582fad
6 changed files with 131 additions and 131 deletions
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24
internal/congestion/cubic_sender.go
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@ -8,14 +8,14 @@ import (
)
const (
// defaultTCPMSS is the default maximum packet size used in the Linux TCP implementation.
// maxDatagramSize is the default maximum packet size used in the Linux TCP implementation.
// Used in QUIC for congestion window computations in bytes.
defaultTCPMSS protocol.ByteCount = 1460
maxBurstBytes = 3 * defaultTCPMSS
maxDatagramSize protocol.ByteCount = 1460
maxBurstBytes = 3 * maxDatagramSize
renoBeta float32 = 0.7 // Reno backoff factor.
maxCongestionWindow = protocol.MaxCongestionWindowPackets * defaultTCPMSS
minCongestionWindow = 2 * defaultTCPMSS
initialCongestionWindow = 32 * defaultTCPMSS
maxCongestionWindow = protocol.MaxCongestionWindowPackets * maxDatagramSize
minCongestionWindow = 2 * maxDatagramSize
initialCongestionWindow = 32 * maxDatagramSize
)
type cubicSender struct {
@ -102,7 +102,7 @@ func (c *cubicSender) TimeUntilSend(bytesInFlight protocol.ByteCount) time.Durat
return 0
}
}
return c.rttStats.SmoothedRTT() * time.Duration(defaultTCPMSS) / time.Duration(2*c.GetCongestionWindow())
return c.rttStats.SmoothedRTT() * time.Duration(maxDatagramSize) / time.Duration(2*c.GetCongestionWindow())
}
func (c *cubicSender) OnPacketSent(
@ -155,7 +155,7 @@ func (c *cubicSender) SlowstartThreshold() protocol.ByteCount {
}
func (c *cubicSender) MaybeExitSlowStart() {
if c.InSlowStart() && c.hybridSlowStart.ShouldExitSlowStart(c.rttStats.LatestRTT(), c.rttStats.MinRTT(), c.GetCongestionWindow()/defaultTCPMSS) {
if c.InSlowStart() && c.hybridSlowStart.ShouldExitSlowStart(c.rttStats.LatestRTT(), c.rttStats.MinRTT(), c.GetCongestionWindow()/maxDatagramSize) {
c.ExitSlowstart()
}
}
@ -213,7 +213,7 @@ func (c *cubicSender) OnPacketLost(
if c.congestionWindow >= 2*c.initialCongestionWindow {
c.minSlowStartExitWindow = c.congestionWindow / 2
}
c.congestionWindow -= defaultTCPMSS
c.congestionWindow -= maxDatagramSize
} else if c.reno {
c.congestionWindow = protocol.ByteCount(float32(c.congestionWindow) * c.RenoBeta())
} else {
@ -256,7 +256,7 @@ func (c *cubicSender) maybeIncreaseCwnd(
}
if c.InSlowStart() {
// TCP slow start, exponential growth, increase by one for each ACK.
c.congestionWindow += defaultTCPMSS
c.congestionWindow += maxDatagramSize
return
}
// Congestion avoidance
@ -265,8 +265,8 @@ func (c *cubicSender) maybeIncreaseCwnd(
c.numAckedPackets++
// Divide by num_connections to smoothly increase the CWND at a faster
// rate than conventional Reno.
if c.numAckedPackets*uint64(c.numConnections) >= uint64(c.congestionWindow)/uint64(defaultTCPMSS) {
c.congestionWindow += defaultTCPMSS
if c.numAckedPackets*uint64(c.numConnections) >= uint64(c.congestionWindow)/uint64(maxDatagramSize) {
c.congestionWindow += maxDatagramSize
c.numAckedPackets = 0
}
} else {