[Cake] CS1 behavior in diffserv4

[Dave Taht <dave.taht@gmail.com>]

I went and fixed transmission (though not cleanly) to emit CS1. It
took a while to find the right entry point, and sure enough, it was
not calling the right thing on udp.

Dumb quick patch:

http://snapon.lab.bufferbloat.net/~cero3/fixtransmission.patch

So, great, I could test what I wanted.

I have to admit I thought diffserv4 put CS1 in class 3? (haven't
looked) (seems more likely we are not matching tos properly in the
first place. Because diffserv8 is mostly class 0 also.)

root@ranger:~# tc -s qdisc show dev eth2
qdisc cake 8011: root refcnt 9 bandwidth 10Mbit diffserv4 flows raw
 Sent 316759388 bytes 245396 pkt (dropped 10653, overlimits 456732 requeues 0)
 backlog 39088b 27p requeues 0
           Class 0     Class 1     Class 2     Class 3
  rate        10Mbit    9375Kbit    7500Kbit    2500Kbit
  target       5.0ms       5.0ms       5.0ms       7.3ms
interval     100.0ms     100.0ms     100.0ms     102.3ms
Pk delay      86.8ms      20.3ms       192us       291us
Av delay      18.8ms       6.5ms         3us         4us
Sp delay       4.4ms       1.1ms         3us         4us
  pkts        219623       36390           2          61
way inds       25724         427           0           0
way miss        2719        2126           2          27
way cols           0           0           0           0
  bytes    289564164    41102703         180        7131
  drops        10577          76           0           0
  marks            0           0           0           0
qdisc ingress ffff: parent ffff:fff1 ----------------
 Sent 23422815 bytes 204407 pkt (dropped 0, overlimits 0 requeues 0)
 backlog 0b 0p requeues 0


-- 
Dave Täht
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