[Bloat] when does the CoDel part of fq_codel help in the real world?

Dave Taht dave.taht at gmail.com
Tue Nov 27 14:25:28 EST 2018


On Tue, Nov 27, 2018 at 10:44 AM Kathleen Nichols <nichols at pollere.com> wrote:
>
>
> I have been kind of blown away by this discussion. Jim Gettys kind of
> kicked off the current wave of dealing with full queues, dubbing it
> "bufferbloat". He wanted to write up how it happened so that people
> could start on a solution and I was enlisted to get an article written.
> We tried to draw on the accumulated knowledge of decades and use a
> context of What Jim Saw. I think the article offers some insight on
> queues (perhaps I'm biased as a co-author, but I'm not claiming any
> original insights just putting it together)
> https://queue.acm.org/detail.cfm?id=2071893
>
> Further, in our first writing about CoDel, Van insisted on getting a
> good explanation of queues and how things go wrong. I think the figures
> and the explanation of how buffers are meant to be shock absorbers are
> very useful (yes, bias again, but I'm not saying you have to agree about
> CoDel's efficacy, just about how queues happen and why we need some
> buffer). https://queue.acm.org/detail.cfm?id=2209336
>
> It's just kind of weird since Jim's evangelism is at the root of this
> list (and Dave's picking up the torch of course). Reading is a lost art.

The working title of my PHD thesis is "Sanely shedding load", which, while
our work to date has made a dent on it, is a broader question, that also applies
to people and how we manage load...

... las, for example, I'm at least 20 messages behind on these lists
this week so far,
and I figure that thesis will never complete until I learn how to
write in passive voice.

I think the two pieces above, this list, evangelism, and working
results has made an
enormous dent in how computer scientists and engineers think about
things over the
last 7 years, and it will continue to percolate through academia and
elsewhere to good effect.

And your and jim's paper has 389 cites now:

https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=bufferbloat&btnG=&oq=

I know, sadly, though, that my opinion about how much we've changed
the world, has more than a bit of confirmation bias in it.

I loved what uber did (https://eng.uber.com/qalm/)

I'd certainly love to see kleinrock taught not just in comp sci and
engineering, but in business and government,
as I just spent 3 hours at the DMV that I wish I didn't need to spend,
and a day where I could hit dice.com for
"queue theory" and come up with hundreds of hits across all
professions... rather than 0.

>
>         Kathie
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> Bloat at lists.bufferbloat.net
> https://lists.bufferbloat.net/listinfo/bloat



-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740


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