Re: [Starlink] Hello List

[Omer Shapira <omer.shapira@gmail.com>]

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> On Mar 2, 2022, at 12:05 PM, Dave Täht <davet@teklibre.net> wrote:
> 
> 
> On Wed, Mar 02, 2022 at 02:55:26PM -0500, Michael Richardson wrote:
>> 
>> <tom@evslin.com <mailto:tom@evslin.com>> wrote:
>>> need to prosper in the hybrid digital world. As all of you know, QoS is much
>>> more than up and downlink speed and tough-to-quantify jitter is a huge part
>>> of it. My measurement tool zoomready (at freecheckip.com <http://freecheckip.com/>
>>> <http://freecheckip.com/ <http://freecheckip.com/>>  and  https://github.com/tevslin/zoomready <https://github.com/tevslin/zoomready>) makes
>>> a more or less continuous measurement of jitter but is quite crude; so
>> 
>> I think that Apple/Stuart did a good job inverting the jitter metric, and calling it
>> Rounds/Revolutions per Minute.  I suggest doing the same in your tool.
> 
> Except it's NOT a jitter metric. It is a latency under load metric primarily aime
> at testing in-band (http 2.0 or quic) AQM latency. Most of our other tests
> to date have a tendency to favor FQ measurements. 

Thanks Dave,

FWIW, the RPM metric is outlined in https://datatracker.ietf.org/doc/draft-ietf-ippm-responsiveness/ 

> 
> Certainly jitter can be pulled out of detailed measurements using some
> of the proposed methodologies. See the rpm@lists.bufferbloat.net <mailto:rpm@lists.bufferbloat.net> list
> an archives for more details.
> 
> We have a regular meeting on implementations and new data
> at 10AM PDT tuesdays if anyone would like to join. 
> 
> 
> 
>> 
>> --
>> ]               Never tell me the odds!                 | ipv6 mesh networks [
>> ]   Michael Richardson, Sandelman Software Works        |    IoT architect   [
>> ]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [
>> 
> 
> 
> 
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