[Cerowrt-devel] cerowrt 3.8.8-4 released

Dave Taht dave.taht at gmail.com
Wed Apr 24 04:55:58 EDT 2013

On Wed, Apr 24, 2013 at 1:55 AM, Dave Taht <dave.taht at gmail.com> wrote:
> + 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.

And of course, you can get it from:


Dave Täht

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

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