[Cake] overheads or rate calculation changed?
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Wed Dec 20 19:54:35 EST 2017
Andy Furniss wrote:
> Been running a cake cobolt from april for some time using
> tc qdisc add dev ppp0 handle 1:0 root cake bandwidth 19690kbit raw
> overhead 34 diffserv4 dual-srchost nat rtt 200ms
> tc -s qdisc ls dev ppp0 (ppp0 is pppoe)
> qdisc cake 1: root refcnt 2 bandwidth 19690Kbit diffserv4 dual-srchost
> nat rtt 200.0ms noatm overhead 56 via-ethernet
> Which is backed off a couple of kbit and tests well (overhead 33 + udp
> flood is over limit)
> With current cobalt + current tc the same command is under rate - I
> don't know if its rate calculation or overheads calc changed.
> overhead 20 (-14) is still under but overhead 12 (-22) is over.
> I was hoping one of those would be correct, but no.
> Any ideas/known changes?
Bisected to -
f33c4d6a08cb21374ce52fc1438a8531bc84bcbe is the first bad commit
Author: Dave Taht <dave.taht at gmail.com>
Date: Wed Nov 22 16:21:13 2017 -0800
refactor cake_advance_shaper and ack_filter
cake_advance_shaper now returns a modified len argument to
skb_ack_filter variable replaced with ack
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