High ksoftirqd/1 cpu usage with openvpn

This forum is for admins who are looking to build or expand their OpenVPN setup.

Moderators: TinCanTech, TinCanTech, TinCanTech, TinCanTech, TinCanTech, TinCanTech

Forum rules
Please use the [oconf] BB tag for openvpn Configurations. See viewtopic.php?f=30&t=21589 for an example.
Post Reply
OpenVpn Newbie
Posts: 3
Joined: Tue May 16, 2023 8:32 am

High ksoftirqd/1 cpu usage with openvpn

Post by dedicatedorange » Wed Feb 21, 2024 3:55 pm

Using openvpn on an aws instance using Amazon Linux 2. When a client connects and tries to transfer a file (from a file on another server), it goes quite slow and on the instance the cpu usage is almost entirely used (99%) by ksoftirqd/1 for the duration of the transfer.

Is there any pointers to troubleshoot this, I can find very little in relation to ksoftirqd/1 in relation to openvpn, has anyone else seen this?

OpenVPN Protagonist
Posts: 11136
Joined: Fri Jun 03, 2016 1:17 pm

Re: High ksoftirqd/1 cpu usage with openvpn

Post by TinCanTech » Wed Feb 21, 2024 5:25 pm

A quick search for ksoftirqd using duckduckgo gives plenty of results about CPU usage.

Post Reply