Question of mptcp with bbr

[GANLIN TANG]

Hello:

I'm testing some mptcp with bbr project, for now I'm using 5.4.230.mptcp and bbr v1,

I want to realize a stable bw in each line, interesting is when the bw detected close to full size the quality in STARTUP stage it will show a very good through put, 

but if the bw was not detected enough in the leaving time all the subflows will shaking in their bw.

And another question is even the subflows not in the same bottleneck if one subflow has a bw fluctuation it will influence other subflows.

[Neal Cardwell]

Hi,

Thanks for the post!

Can you please share some details about your experiments, to make it easier to interpret what's going on?

+ Which flows are sharing bottlenecks?

+ What are the bottleneck link bandwidths and RTTs of the paths of each flow?

+ What are the units of the X and Y axis of the graphs?

+ What is the workload? Bulk transfers with netpef? Something else?

+ What is the environment you are using? Are these real links? If so, what link technology (Ethernet, wifi, cellular,...)? Links emulated with a software tool? If so, which software tool and with what parameters?

Thanks!

neal

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