[Bug 234754] FreeBSD 12.0 ena Network Driver on AWS EC2 Packet Loss

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=234754

--- Comment #11 from Mike Walker <mwalker at carbonhouse.com> ---
(In reply to Colin Percival from comment #10)

Hi Colin,

Whew, I'm glad to hear the TCP issue is hopefully resolved in stable/12. I'm
building that now and will test it shortly.

Regarding the UDP issue, I'm personally less concerned about that since I don't
have a production use of UDP that would be impacted, but I'm curious if anyone
else can replicate it.

In testing UDP with a 100M byte file I get the following results:

Sending side: residential ISP connection
Receiving side: AWS eu-west-1 t3.medium FreeBSD 12.0-RELEASE

----------------------------------------------

Full Bandwidth: (Same results to within a few percent trying 5 times)

Sending side reports sending entire file, @ 41.6MiB/s
Receiving side: Transfer stalled @ 1.9MB

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Bandwidth Limited, sending side, pv set to 250KBytes/sec:

Sending side: reports full transfer @ 244KiB/s
Receiving side: Transfer complete, no errors

----------------------------------------------

Bandwidth Limited, sending side, pv set to 1MBytes/sec:

Sending side: reports full transfer @ 976KiB/s
Receiving side: Transfer complete, no errors

----------------------------------------------

Bandwidth Limited, sending side, pv set to 2MBytes/sec:

Sending side: reports full transfer @ 1.91MiB/s
Receiving side: Transfer stalled @ 68.2MB

----------------------------------------------

Bandwidth Limited, sending side, pv set to 5MBytes/sec:

Sending side: reports full transfer @ 4.78MiB/s
Receiving side: Transfer stalled @ 20.2MB

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