https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=272944

--- Comment #2 from jsml4thwwbid6...@protonmail.com ---
Here is the iperf3 test using a single thread. (iperf3 -c IP -P 1)

SHARED NET
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  14.2 GBytes  12.2 Gbits/sec    0             sender
[  5]   0.00-10.00  sec  14.2 GBytes  12.2 Gbits/sec                  receiver

VNET
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  2.18 GBytes  1.87 Gbits/sec    0             sender
[  5]   0.00-10.00  sec  2.18 GBytes  1.87 Gbits/sec                  receiver

The single threaded performance difference is even worse than using multiple
threads. 

Would using multiple Vnet jails decrease performance even more due to there
only being a single, global taskqueue thread? I'll give the "options RSS" a try
later this week and report back with single and multi-threaded tests.

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