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Date: Wed, 17 Apr 2019 17:08:55 +0200 (CEST)
From: Wojciech Puchar <wojtek@puchar.net>
To: freebsd-hackers@freebsd.org
Subject: openvpn and system overhead
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i'm running openvpn server on Xeon E5 2620 server.

when receiving 100Mbit/s traffic over VPN it uses 20% of single core.
At least 75% of it is system time.

Seems like 500Mbit/s is a max for a single openvpn process.

can anything be done about that to improve performance?