[Bloat] [Cerowrt-devel] fq_codel is SEVEN years old today...

[David P. Reed]

Well, of all the devices in my house (maybe 100), only the router attached to the cable modem (which is a 2x GigE Intel Linux board based on Fedora 29 server with sch_cake configured) is running fq_codel. And setting that up was a labor of love. But it works a charm for my asymmetric Gigabit cable service.
 
My home's backbone is 10 GigE fiber, so I suppose fq_codel would be helpful for devices that run on 1 GigE subnets like my 2 802.11ac access points when talking to my NAS's.
However, the 802.11ac access point high speed functionality doesn't seem to be supportable by LEDE. So what can I do? 
 
I suppose I could stick some little custom Intel Linux 2x GigE devices between access points and the 10 GigE backbone, and put fq_codel in there.
 
My point is, to get the primary benefit of bufferbloat reduction, one has to stick little Linux boxes everywhere, because fq_codel is not supported except via DIY hacking.
 
And indeed, 10 GigE->1 GigE buffering does affect storage access latency in bad ways.
 
We see the same problem in datacenter networks that have excessive buffering - a famous switch company backed by Andy Bechtolsheim is really problematic because they claim building up huge buffers is a "feature" not a bug.
-----Original Message-----
From: "Valdis Klētnieks" <valdis.kletnieks at vt.edu>
Sent: Tuesday, May 14, 2019 1:57pm
To: "Rich Brown" <richb.hanover at gmail.com>
Cc: "cerowrt-devel" <cerowrt-devel at lists.bufferbloat.net>, "bloat" <bloat at lists.bufferbloat.net>
Subject: Re: [Cerowrt-devel] fq_codel is SEVEN years old today...



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On Tue, 14 May 2019 08:16:06 -0400, Rich Brown said:

> Let's all pat ourselves on the back for this good work!

Do we have an estimate of what percent of connected devices
are actually using fq_codel or other modern anti-bloat methods?
I'm reasonably sure my TV, my PS3, and my PS4 are still
behind the curve.
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