| // Copyright 2019 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef QUICHE_QUIC_CORE_CONGESTION_CONTROL_BBR2_STARTUP_H_ |
| #define QUICHE_QUIC_CORE_CONGESTION_CONTROL_BBR2_STARTUP_H_ |
| |
| #include "quiche/quic/core/congestion_control/bbr2_misc.h" |
| #include "quiche/quic/core/quic_bandwidth.h" |
| #include "quiche/quic/core/quic_time.h" |
| #include "quiche/quic/core/quic_types.h" |
| #include "quiche/quic/platform/api/quic_export.h" |
| |
| namespace quic { |
| |
| class Bbr2Sender; |
| class QUIC_EXPORT_PRIVATE Bbr2StartupMode final : public Bbr2ModeBase { |
| public: |
| Bbr2StartupMode(const Bbr2Sender* sender, Bbr2NetworkModel* model, |
| QuicTime now); |
| |
| void Enter(QuicTime now, |
| const Bbr2CongestionEvent* congestion_event) override; |
| void Leave(QuicTime now, |
| const Bbr2CongestionEvent* congestion_event) override; |
| |
| Bbr2Mode OnCongestionEvent( |
| QuicByteCount prior_in_flight, QuicTime event_time, |
| const AckedPacketVector& acked_packets, |
| const LostPacketVector& lost_packets, |
| const Bbr2CongestionEvent& congestion_event) override; |
| |
| Limits<QuicByteCount> GetCwndLimits() const override { |
| // Inflight_lo is never set in STARTUP. |
| QUICHE_DCHECK_EQ(Bbr2NetworkModel::inflight_lo_default(), |
| model_->inflight_lo()); |
| return NoGreaterThan(model_->inflight_lo()); |
| } |
| |
| bool IsProbingForBandwidth() const override { return true; } |
| |
| Bbr2Mode OnExitQuiescence(QuicTime /*now*/, |
| QuicTime /*quiescence_start_time*/) override { |
| return Bbr2Mode::STARTUP; |
| } |
| |
| struct QUIC_EXPORT_PRIVATE DebugState { |
| bool full_bandwidth_reached; |
| QuicBandwidth full_bandwidth_baseline = QuicBandwidth::Zero(); |
| QuicRoundTripCount round_trips_without_bandwidth_growth; |
| }; |
| |
| DebugState ExportDebugState() const; |
| |
| private: |
| const Bbr2Params& Params() const; |
| |
| void CheckExcessiveLosses(const Bbr2CongestionEvent& congestion_event); |
| // Used when the pacing gain can decrease in STARTUP. |
| QuicBandwidth max_bw_at_round_beginning_ = QuicBandwidth::Zero(); |
| }; |
| |
| QUIC_EXPORT_PRIVATE std::ostream& operator<<( |
| std::ostream& os, const Bbr2StartupMode::DebugState& state); |
| |
| } // namespace quic |
| |
| #endif // QUICHE_QUIC_CORE_CONGESTION_CONTROL_BBR2_STARTUP_H_ |