Dong Mo <montedong@gmail.com> writes:

> I also found this to sample tcp latency performance:
> https://code.google.com/p/paping/

Right; note that that measures time to establish a new connection, not
the delay of packets within an already established connection. My guess
would be that each established connection would have a new source port,
thus hashing into a new bin.

> Does fq_codel's flow classification supports external classifier
> filter? Say I only want to hash on dst port in my case.

I'm pretty sure it supports the normal classifier (tc filter). That
overrides the built-in hashing completely, but IIRC you can do your own
hashing in tc filter :)

-Toke