Unused Subflows

Graph file: overhead_stats.py
Main fields:

conn.flows[*].attr[co.C2S].get[co.BYTES]  # Unique data bytes sent on a subflow from smartphone to proxy
conn.flows[*].attr[co.S2C].get[co.BYTES]  # Unique data bytes sent on a subflow from proxy to smartphone

Definition of unused subflow

A subflow is considered as unused if no data bytes were carried on this flow on both data flows (smartphone to proxy and proxy to smartphone).

Additional information

To avoid under-estimating the phenomenon, only connections having at least two subflows are taken into account.
In addition to counting the number of unused subflows, the file overhead_stats.py also prints other numbers (# of backup subflows, # of subflows with the better RTT,...) trying to explain the obtained result.