[Ecn-sane] osx ecn

[Dave Taht]

netstat -sp tcp has all kinds of useful stats


        7174 client connections attempted to negotiate ECN

                4407 client connections successfully negotiated ECN

                2192 times graceful fallback to Non-ECN connection

                2053 times lost ECN negotiating SYN, followed by retransmission

??
                0 server connection attempted to negotiate ECN

                0 server connection successfully negotiated ECN

                0 time lost ECN negotiating SYN-ACK, followed by retransmission

                90 times received congestion experienced (CE) notification

                0 time CWR was sent in response to ECE

                3298 times sent ECE notification

                25 connections received CE atleast once

                0 connection received ECE atleast once

                830 connections using ECN have seen packet loss but no CE

                12 connections using ECN have seen packet loss and CE

                13 connections using ECN received CE but no packet loss

                9 connections fell back to non-ECN due to SYN-loss

                135 connections fell back to non-ECN due to reordering

                0 connection fell back to non-ECN due to excessive CE-markings



-- 

Dave Täht
CTO, TekLibre, LLC
http://www.teklibre.com
Tel: 1-831-205-9740