[Ecn-sane] osx ecn

[Mikael Abrahamsson]

On Tue, 27 Aug 2019, Michael Welzl wrote:

> run it as root - strange, yes, but then the output is very different.

Thanks, indeed.

$ sudo netstat -sp tcp | egrep 'CE|EC'
 	11097 client connections attempted to negotiate ECN
 		4864 client connections successfully negotiated ECN
 		3800 times graceful fallback to Non-ECN connection
 		467 times lost ECN negotiating SYN, followed by retransmission
 		52 server connections attempted to negotiate ECN
 		52 server connections successfully negotiated ECN
 		0 time lost ECN negotiating SYN-ACK, followed by retransmission
 		427 times received congestion experienced (CE) notification
 		0 time CWR was sent in response to ECE
 		6111 times sent ECE notification
 		15 connections received CE atleast once
 		0 connection received ECE atleast once
 		267 connections using ECN have seen packet loss but no CE
 		1 connection using ECN have seen packet loss and CE
 		14 connections using ECN received CE but no packet loss
 		14 connections fell back to non-ECN due to SYN-loss
 		1 connection fell back to non-ECN due to reordering
 		0 connection fell back to non-ECN due to excessive CE-markings


-- 
Mikael Abrahamsson    email: swmike at swm.pp.se