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implement packet pacing

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This commit is contained in:
Marten Seemann 2017-12-31 14:33:29 +07:00
parent c3cc35363b
commit 5ef89733ae
10 changed files with 153 additions and 50 deletions
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20
ackhandler/sent_packet_handler_test.go
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@ -741,28 +741,36 @@ var _ = Describe("SentPacketHandler", func() {
})
It("allows or denies sending based on congestion", func() {
Expect(handler.retransmissionQueue).To(BeEmpty())
handler.bytesInFlight = 100
cong.EXPECT().GetCongestionWindow().Return(protocol.MaxByteCount)
cong.EXPECT().GetCongestionWindow().Return(protocol.ByteCount(200))
Expect(handler.SendingAllowed()).To(BeTrue())
cong.EXPECT().GetCongestionWindow().Return(protocol.ByteCount(0))
cong.EXPECT().GetCongestionWindow().Return(protocol.ByteCount(75))
Expect(handler.SendingAllowed()).To(BeFalse())
})
It("allows or denies sending based on the number of tracked packets", func() {
cong.EXPECT().GetCongestionWindow().Return(protocol.MaxByteCount).AnyTimes()
cong.EXPECT().GetCongestionWindow().Times(2)
Expect(handler.SendingAllowed()).To(BeTrue())
handler.retransmissionQueue = make([]*Packet, protocol.MaxTrackedSentPackets)
Expect(handler.SendingAllowed()).To(BeFalse())
})
It("allows sending if there are retransmisisons outstanding", func() {
cong.EXPECT().GetCongestionWindow().Times(2)
handler.bytesInFlight = 100
cong.EXPECT().GetCongestionWindow().Return(protocol.ByteCount(0)).AnyTimes()
Expect(handler.retransmissionQueue).To(BeEmpty())
Expect(handler.SendingAllowed()).To(BeFalse())
handler.retransmissionQueue = []*Packet{nil}
handler.retransmissionQueue = []*Packet{{PacketNumber: 3}}
Expect(handler.SendingAllowed()).To(BeTrue())
})
It("gets the pacing delay", func() {
cong.EXPECT().OnPacketSent(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any())
handler.SentPacket(&Packet{PacketNumber: 1})
handler.bytesInFlight = protocol.ByteCount(100)
cong.EXPECT().TimeUntilSend(handler.bytesInFlight).Return(time.Hour)
Expect(handler.TimeUntilSend()).To(BeTemporally("~", time.Now().Add(time.Hour), time.Second))
})
})
Context("calculating RTO", func() {