mirror of
https://github.com/refraction-networking/uquic.git
synced 2025-04-04 20:57:36 +03:00
95575f5fe7
uTLS is not yet bumped to the new version, so this commit breaks the dependencies relationship by getting rid of the local replace.
73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
package congestion
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import (
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"time"
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"github.com/refraction-networking/uquic/internal/protocol"
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. "github.com/onsi/ginkgo/v2"
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. "github.com/onsi/gomega"
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)
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var _ = Describe("Hybrid slow start", func() {
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var slowStart HybridSlowStart
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BeforeEach(func() {
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slowStart = HybridSlowStart{}
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})
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It("works in a simple case", func() {
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packetNumber := protocol.PacketNumber(1)
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endPacketNumber := protocol.PacketNumber(3)
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slowStart.StartReceiveRound(endPacketNumber)
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packetNumber++
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeFalse())
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// Test duplicates.
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeFalse())
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packetNumber++
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeFalse())
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packetNumber++
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeTrue())
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// Test without a new registered end_packet_number;
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packetNumber++
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeTrue())
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endPacketNumber = 20
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slowStart.StartReceiveRound(endPacketNumber)
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for packetNumber < endPacketNumber {
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packetNumber++
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeFalse())
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}
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packetNumber++
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Expect(slowStart.IsEndOfRound(packetNumber)).To(BeTrue())
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})
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It("works with delay", func() {
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rtt := 60 * time.Millisecond
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// We expect to detect the increase at +1/8 of the RTT; hence at a typical
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// RTT of 60ms the detection will happen at 67.5 ms.
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const hybridStartMinSamples = 8 // Number of acks required to trigger.
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endPacketNumber := protocol.PacketNumber(1)
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endPacketNumber++
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slowStart.StartReceiveRound(endPacketNumber)
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// Will not trigger since our lowest RTT in our burst is the same as the long
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// term RTT provided.
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for n := 0; n < hybridStartMinSamples; n++ {
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Expect(slowStart.ShouldExitSlowStart(rtt+time.Duration(n)*time.Millisecond, rtt, 100)).To(BeFalse())
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}
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endPacketNumber++
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slowStart.StartReceiveRound(endPacketNumber)
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for n := 1; n < hybridStartMinSamples; n++ {
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Expect(slowStart.ShouldExitSlowStart(rtt+(time.Duration(n)+10)*time.Millisecond, rtt, 100)).To(BeFalse())
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}
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// Expect to trigger since all packets in this burst was above the long term
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// RTT provided.
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Expect(slowStart.ShouldExitSlowStart(rtt+10*time.Millisecond, rtt, 100)).To(BeTrue())
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})
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})
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