openvpn and system overhead

[Wojciech Puchar]

On Wed, 17 Apr 2019, Miroslav Lachman wrote:

> 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
>
>
again. it's system time mostly not user time.