[Bloat] fixing bufferbloat in 2017
bcronce at gmail.com
Wed Nov 23 14:29:38 EST 2016
I meant the actual physical link, not the provisioned rate. Most last mile
tech encapsulates Ethernet frames into larger super-frames. Decapsulating
the Ethernet frames is pretty much at 1Gb line rate. On my GPON link, with
shaping in PFSense turned off, I regularly see 4,000+ 1500byte datagrams at
full 1Gb link rate hitting my WAN before my ISP starts shaping to my
150Mb/s average. When I had a cable modem, I would see similar, except
instead of a constant 1Gb/s, I would see bursts of multiple packets, then a
small pause, but eventually the packets started to get more and more spaced
as the provisioned average started to kick in. I assumed this was because
my DOCSIS3 8x bonded link could only max out around 300Mb/s, even though my
provisioned rate was only 30Mb/s.
It really depended on the quantum of the shaping algorithm, calculated
average window size, and how elastic or strict it was.
Ahh, packet packing, what a fun problem.
On Wed, Nov 23, 2016 at 12:38 PM, David Lang <david at lang.hm> wrote:
> On Wed, 23 Nov 2016, Benjamin Cronce wrote:
> Most people only have a 1Gb network link,
> umm, no, most people have FAR slower links, by an order or two of
> David Lang
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