openvpn and system overhead

[Miroslav Lachman]

Wojciech Puchar wrote on 2019/04/17 17:08:
> 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?

You can play with ciphers, AES-NI etc.
https://community.openvpn.net/openvpn/wiki/Gigabit_Networks_Linux

Miroslav Lachman