[Codel] [Cerowrt-devel] preliminary codel and fq_codel support for cerowrt

[dave taht]

On 05/16/2012 09:34 AM, Sebastian Moeller wrote:
> Hi Dave,
>
> so I upgraded my router to the most recent version, and hey I am really impressed, thanks a lot for all the work.
> (I never really stress the local network, and the internet is 5/30 so I consider to be on the safe side of #379 and decided to ignore your recommendation about the suitability for main routers).
> 	I tried the simple_qos.sh script and for my testing it is quite nice indeed. The whole network stays quite responsive even during abuse. The whole expeience was quite pleasant (using ssh over a ssl based VPN to remote control an X11 session while stressing in and out direction); counter to my subjective experience though netalyzr was detecting 3000 odd milliseconds of buffering upstream (downstream was fine). Once I find more time I will have a go at reproducing that. (Now I have to figure out whether I need to restart simple_qos.sh anytime I down or up an interface; any pointer?) BTW, how do you envision this to be started under the AQM tab; shall this start simple_qos or rather debloat?

No, I had something more wonderful in mind.

Felix Fietkau has added fq_codel to the openwrt 3.3 kernel and to the 
existing qos-scripts as of openwrt revision 31761.

Builds for 37 architectures and ~150 platforms are popping out as I write.

See

http://buildbot.openwrt.org:8010/one_line_per_build

For details.

I will be obsoleting the CeroWrt aqm and aqm-scripts and simple_qos as 
soon as the new qos-scripts handles ipv6 properly, and maybe get a 
chance to add a trick or two to more to it.

Erics latest patch to fq_codel has not yet landed in openwrt.


> Small observation, port 81 on the router seems open to the internet, easily fixed, but maybe something you might want know :)
Patches gladly accepted. Frankly I'd hoped to have CeroWall done by now, 
but, well, the ball's on the 20 yard line, and I need to bench myself 
for a while.

Hopefully someone else can take it in for the score.
>
> Anyway, thanks again
> 	Sebastian
>
>
> On May 14, 2012, at 1:59 PM, Dave Taht wrote:
>
>> A test release of CeroWrt is now available that has support for Kathie
>> Nichols' and Van Jacobson's new AQM, Codel , and Eric Dumazet's new
>> fair queuing implementation on top of that, fq_codel.
>>
>> fq_codel is enabled on all interfaces by default. It is vastly simpler
>> than what we were using before (sfqred) and draws upon and improves on
>> the same body of ideas (head drop, fq, timestamping) but is now tied
>> to Kathie and Van's blinding insights as to a good drop strategy, and
>> Eric's successor-to-sfqred ideas as towards head of queue behavior,
>> modern amounts of flows, and cache line optimizations.
>>
>> There is a simple_qos.sh script that can be set to your uplink and
>> downlink speeds, but no uci interface for it as yet, nor gui. (help on
>> finishing aqm-scripts and the luci interface gladly accepted)
>>
>> To see all the chocolately goodness of what fq_codel can do to wired
>> and wireless latency, it would be good for more to play with it.
>>
>> Benchmarks have been very good thus far, and more benchmarks and
>> analysis are highly desired.
>>
>> Caveat:
>>
>> This release suffers from an unrelated bug ( #379 ) and should NOT be
>> installed as your main router. I would love to beat this bug because
>> it's the only prio 1 remaining but thus far, no luck. Under lighter
>> loads CeroWrt appears to work just fine, but that's for me. YMMV.
>>
>> Get it here: http://huchra.bufferbloat.net/~cero1/3.3/3.3.6-2/
>>
>>
>> -- 
>> Dave Täht
>> SKYPE: davetaht
>> US Tel: 1-239-829-5608
>> http://www.bufferbloat.net
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