Andy Furniss wrote:
Andy Furniss wrote:
b) it reacts to increase in RTT. An experiment with 10 Mbps
bottleneck, 40 ms RTT and a typical 1000 packet buffer, increase in
RTT with BBR is ~3 ms while with cubic it is over 1000 ms.
That is a nice aspect (though at 60mbit hfsc + 80ms bfifo I tested with
5 tcps it was IIRC 20ms vs 80 for cubic). I deliberately test using ifb
on my PC because I want to pretend to be a router - IME (OK it was a
while ago) testing on eth directly gives different results - like the
locally generated tcp is backing off and giving different results.
I retested this with 40ms latency (netem) with hfsc + 1000 pfifo on ifb.
Forgot to put this was was 10mbit not 60.
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