Change Details

First cut implementation of hybrid slow start

First cut implementation of hybrid slow start Hybrid Slow Start was introduced by Sangtae Ha and Injong Rhee in "Hybrid slow start for high-bandwidth and long-distance networks" in 2008. An extended version is available at: https://pdfs.semanticscholar.org/7f9a/d9212ccb9ab9b5614bef93347a4b05266a77.pdf It is essentially just the combination of 2 heuristics for when to exit slow start before encountering loss or reaching ssthresh: - find the minimum RTT in the initial ACK train of HYSTART_MIN_SAMPLES, if the minimum RTT from the sample period is greater than the minimum RTT so far + some threshold value of the minRTT, exit slow start - if the time since the last ack is <= hystart_ack_delta (2ms by default) and the time since the start of the packet train is greater than the minimum measure RTT / 16 exit slow start

First cut implementation of hybrid slow start Hybrid Slow Start was introduced by Sangtae Ha and Injong Rhee in "Hybrid slow start for high-bandwidth and long-distance networks" in 2008. An extended version is available at: https://pdfs.semanticscholar.org/7f9a/d9212ccb9ab9b5614bef93347a4b05266a77.pdf It is essentially just the combination of 2 heuristics for when to exit slow start before encountering loss or reaching ssthresh: - find the minimum RTT in the initial ACK train of HYSTART_MIN_SAMPLES, if the minimum RTT from the sample period is greater than the minimum RTT so far + some threshold value of the minRTT, exit slow start - if the time since the last ack is <= hystart_ack_delta (2ms by default) and the time since the start of the packet train is greater than the minimum measure RTT / 16 exit slow start