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netstack: make CUBIC a possible default congestion control algorithm

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CUBIC should perform as well or better than Reno in most cases, especially high
BDP networks. It is the default algorithm in Linux.

PiperOrigin-RevId: 653420932
This commit is contained in:
Kevin Krakauer
2024-07-17 18:08:18 -07:00
committed by gVisor bot
parent b66efac8c2
commit 899e8631a7
1 changed files with 14 additions and 2 deletions
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pkg/tcpip/transport/tcp/protocol.go
+14 -2
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@@ -513,8 +513,20 @@ func (*protocol) Parse(pkt *stack.PacketBuffer) bool {
return parse.TCP(pkt)
}
// NewProtocol returns a TCP transport protocol.
// NewProtocol returns a TCP transport protocol with Reno congestion control.
func NewProtocol(s *stack.Stack) stack.TransportProtocol {
return newProtocol(s, ccReno)
}
// NewProtocolCUBIC returns a TCP transport protocol with CUBIC congestion
// control.
//
// TODO(b/345835636): Remove this and make CUBIC the default across the board.
func NewProtocolCUBIC(s *stack.Stack) stack.TransportProtocol {
return newProtocol(s, ccCubic)
}
func newProtocol(s *stack.Stack, cc string) stack.TransportProtocol {
rng := s.SecureRNG()
var seqnumSecret [16]byte
var tsOffsetSecret [16]byte
@@ -537,7 +549,7 @@ func NewProtocol(s *stack.Stack) stack.TransportProtocol {
Max: MaxBufferSize,
},
sackEnabled: true,
congestionControl: ccReno,
congestionControl: cc,
availableCongestionControl: []string{ccReno, ccCubic},
moderateReceiveBuffer: true,
lingerTimeout: DefaultTCPLingerTimeout,