>> Pardon, but cwnd should NEVER be larger than the number of forwarding hops >> between source and destination. >> Kleinrock and students recently proved that the optimum cwnd for both >> throughput and minimized latency is achieved when there is one packet or >> less in each outbound queue from source to destination (including cross >> traffic - meaning other flows sharing the same outbound queue. > > This argument holds only if time-of-flight *between* nodes is negligible. > Trivially, a geosynchronous satellite hop adds only two nodes but > approximately half a second to the one-way path delay, with potentially > thousands of packets existing only as radio waves in the distance between, > not in a queue.
Continuing my train of thought, what Kleinrock really implies is that the cwnd should *exceed* the native BDP by at most the number of hops. - Jonathan Morton _______________________________________________ Bloat mailing list [email protected] https://lists.bufferbloat.net/listinfo/bloat
