solanaceae_ngc_ft1/solanaceae/ngc_ft1/cubic.hpp

57 lines
1.5 KiB
C++

#pragma once
#include "./flow_only.hpp"
#include <chrono>
struct CUBIC : public FlowOnly {
//using clock = std::chrono::steady_clock;
public: // config
//static constexpr float BETA {0.7f};
static constexpr float BETA {0.8f};
static constexpr float SCALING_CONSTANT {0.4f};
static constexpr float RTT_EMA_ALPHA = 0.1f; // 0.1 is very smooth, might need more
private:
// window size before last reduciton
double _window_max {2.f * MAXIMUM_SEGMENT_SIZE}; // start with mss*2
//double _window_last_max {2.f * MAXIMUM_SEGMENT_SIZE};
double _time_point_reduction {getTimeNow()};
private:
float getCWnD(void) const;
// moving avg over the last few delay samples
// VERY sensitive to bundling acks
//float getCurrentDelay(void) const;
//void addRTT(float new_delay);
void onCongestion(void) override;
public: // api
CUBIC(size_t maximum_segment_data_size) : FlowOnly(maximum_segment_data_size) {}
virtual ~CUBIC(void) {}
float getWindow(void) override;
// TODO: api for how much data we should send
// take time since last sent into account
// respect max_byterate_allowed
int64_t canSend(float time_delta) override;
// get the list of timed out seq_ids
//std::vector<SeqIDType> getTimeouts(void) const override;
public: // callbacks
// data size is without overhead
//void onSent(SeqIDType seq, size_t data_size) override;
//void onAck(std::vector<SeqIDType> seqs) override;
// if discard, not resent, not inflight
//void onLoss(SeqIDType seq, bool discard) override;
};