[Ecn-sane] osx ecn

[Jonathan Morton]

> On 29 Aug, 2019, at 2:45 am, Dave Taht <dave.taht at gmail.com> wrote:
> 
> I'm a little puzzled over the cwr/ece ratio?
> 
> 25 times received congestion experienced (CE) notification

This is at the IP layer, on received data.

> 619 times sent ECE notification

This is at the TCP layer, acking received data.  (ECE is sticky until CWR, so the ratio of the above is related to the average cwnd at congestion onset.)

> 37 times CWR was sent in response to ECE

This is at the TCP layer, on *sent* data, and therefore independent of the other two.

 - Jonathan Morton