Le jeudi 17 mars 2011 à 15:20 -0700, Rick Jones a écrit : > I would think that unless the rest of the segments of the connection > will also bypass most of the traffic, the SYN or SYN|ACK should not > bypass - to do so will give the TCP connection a low, unrealistic > initial estimate of the RTT. Given the recent change in Linux upstream > to go to cwnd_init of 10 segments, and the prospect of other stacks > following that lead in implementing the draft RFC, if there is a big > slow queue of traffic that the data segments will not bypass, it would > seem better to have the SYN or SYN|ACK get delayed and retransmitted to > get the cwnd down. > > SYN and SYN|ACK segments should not receive special treatment beyond > what data segments for the same connection would get.
Agreed. RFC 3168 (The Addition of Explicit Congestion Notification (ECN) to IP) discuss of this topic, and goes further : SYN packets, or retransmitted packets dont have ECT marker : They have higher probabilities to be dropped by ECN routers than marked and pass the congestion point. _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
