[Bloat] Notes about hacking on AQMs

Dave Taht dave.taht at gmail.com
Wed Jun 8 12:52:07 EDT 2011

On Wed, Jun 8, 2011 at 10:41 AM, Eric Dumazet <eric.dumazet at gmail.com> wrote:
> Le mercredi 08 juin 2011 à 09:51 -0600, Dave Taht a écrit :
>> And they are *all* wrong to varying extents, which is why I like the
>> 'mondo classifier' idea for DSCP+firewalling mentioned earlier on this
>> thread. Converging on several standards for packet marking vs the
>> adhoc-ness of thousands of different partial solutions that now exist
>> really makes sense to me.
> I can tell you there are hundred of different *valid* setups, especially
> in server farms, when you want some control of network trafic, now
> machines have Gb or 10Gb links...

Well, there are hundreds of thousands of completely ad-hoc solutions
of varying degrees of effacy.

Getting it down to mere hundreds would be be a good start.

> Really, there is no "one big thing that solves all problems,
> automatically".

Oh, I agree.

> You are doing a great job, but now we need to split all your findings
> into small units and eventually fix problems.

I appreciate the rapidity as problems have been found, as fixed.
I mean, I only saw ECN actually start to work as advertised a month or
two ago, and the results were very promising, as shared on the bloat

> Do not expect everything to work, since few people are interested to
> make the necessary kernel changes in their free time.

Well, funding this work would be a great thing for everybody, and
we're working on it, and boy do we appreciate the volunteerism as it

Everybody, including me, is basically working for free here, (I'm
leveraging the lab at gatech and am (now) making a little money
supporting their bismark effort, but just a little) - but fixing the
internet as a whole is a worthy goal, don't you think? It beats
building web sites....


> BTW, latest stuff uses DRR & HFSC ;)

> Patrick sample script is here :
> http://people.netfilter.org/kaber/shaping

AWESOME! I was going to get DRR working in my next build and series of
test runs. And look harder at HSFC than I have as yet.

I'm told the latest iproute2 code will be out soon, once all those
pieces are in place, I can beat them all up, pretty good, in the lab.


Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608

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