[Bloat] Curious bufferbloat on DOCSIS connection with many downloads

[Benjamin Cronce]

Along what Michael Richardson said, with GPON I have seen where idle
latency was ~1.5ms, but under load latency was about 0.2ms. I wouldn't be
surprised if TDMA scheduling playing a factor. I don't know what kind of
latency SLAs DOCSIS can or typically have. GPON has scheduling latency all
the way down to 0.5ms.

On Tue, Jan 16, 2018 at 3:34 PM, Michael Richardson <mcr at sandelman.ca>
wrote:

>
> Arie <nospam at ariekanarie.nl> wrote:
>     > I'm puzzled by this result, somehow sending 300KB/s of empty packets
>     > upstream drastically improves the latency of my connection when it's
>     > receiving many downloads.
>
> Maybe not exactly power save, but perhaps asking for the upstream bandwidth
> gets the CMTS to notice you more often and schedule a dump of it's queue of
> traffic for you.
>
> --
> ]               Never tell me the odds!                 | ipv6 mesh
> networks [
> ]   Michael Richardson, Sandelman Software Works        | network
> architect  [
> ]     mcr at sandelman.ca  http://www.sandelman.ca/        |   ruby on
> rails    [
>
>
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