[Bloat] active sensing queue management

[Dave Taht]

http://dl.ifip.org/db/conf/networking/networking2015/1570064417.pdf

gargoyle's qos system follows a similar approach, using htb + sfq, and
a short ttl udp flow.

Doing this sort of measured, then floating the rate control with
"cake" would be fairly easy (although it tends to be a bit more
compute intensive not being on a fast path)

What is sort of missing here is trying to figure out which side of the
bottleneck is the bottleneck (up or down).

-- 
Dave Täht
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