[Cerowrt-devel] cerowrt 3.8.8-4 released

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

+ Refresh to openwrt barrier breaker head

   this now contains nearly all the patches formerly separately in cerowrt!

   ++ fq_codel is on by default on ALL interfaces with default quantum of 300
        (yes, openwrt has obsoleted pfifo_fast!)
   ++ unaligned access patches, etc, etc
   + dhcp-pd SERVER support
 the usual multitude of other openwrt fixes... all tested extensively
at the battlemesh conference.

+ Update to dnsmasq 2.67test2

Toke got really busy in building his own version of cero and adding

+ AQM scripts and gui
+ tahoe-lafs added (untested)
+ uftp4 updated

- no upnp/ssdp fix because I'm clueless

Yep, "AQM" gui now. /deep hat tip to toke for writing that. No need to
fiddle with any scripts now....

I guess of largest import here, underlying the gui, is that I had a
chance to deeply look at simple_qos.sh. There are several bugs in it,
that appear actually in the underlying tc subsystem.On ingress, the
priority queue was not being used properly, and a few other things
were odd in ipv6.

Out of frustration with that, and based on the data we'd got back from
cablelabs, I wrote the simplest possible rate limited fq_codel
implementation, using a reduced number of flows and a single tier of
htb only - and that works surprisingly well.

It's called "Simplest" in the new AQM screen. Give it a shot.

Secondly, the exercise of writing that and comparing it to the simple_qos script

.... seems to have exposed a bug in htb at low bandwidths.

http://snapon.lab.bufferbloat.net/~d/dsl384k-htb-bug.svg

Here I was trying at 384k up and 8Mbit down, and the middle portion of
the upload graph there is kind of... impossible. At higher rates I
haven't seen this happen.

-- 
Dave Täht

Fixing bufferbloat with cerowrt: http://www.teklibre.com/cerowrt/subscribe.html