Synology: How do i determine if wireguard is using kernel module or go

[arpitgupta]

I understand Synlogy does not natively have the wireguard kernel module. However i installed this https://github.com/runfalk/synology-wireguard which adds wireguard support to synology. So i was thinking that the container should now use the kernel module? Is there a way for me to confirm that? Is there anything in the logs that has that info?

[qdm12]

Ok so I went down a long rabbit hole to find the Wireguard library I was using did not automagically use the Kernelspace implementation if it was available.

HOWEVER, I implemented an 'opportunistic' kernel space usage in cfa3bb3 (latest image) where the kernelspace implementation is used if it is available; otherwise it fallsback on the (previously existing) userspace Go implementation. My apologies for the false claims, I was mistaken. At least it's fixed now 👍

Gluetun will now also log out the implementation it's using (userspace or kernelspace)

[arpitgupta]

hmm might be getting better speeds. I am constantly seeing 150+ MBit/s. Earlier i would see some results however 70ish range. However i never really did any baselines. May be if we can explicitly select to use kernel vs userpsace we can do some tests, but even then we will be at the mercy of the ISP.

[qdm12]

Yes although I'm in the middle of a big config parsing rework, and since kernel is really meant to be at least as fast as userspace, I would rather prefer not to have it as an option.

Just use image qmcgaw/gluetun:v3.26.0 which uses userspace, using the same VPN server 😉

[arpitgupta]

I am confused now :). So userspace == go? I have been using qmcgaw/gluetun:v3.26.0 so I should be using the go implementation? Or do i have this wrong lol.

[qdm12]

Yes you have it right. Userspace is a Go implementation that exists in both v3.26.0 and latest. The kernel implementation is, well, in the kernel so it's independent from Gluetun. However only the latest gluetun image detects it and uses it, not v3.26.0 which only uses the userspace (go) implementation.

[arpitgupta]

Ah duh i was not using a tag in my image so it picked latest :). Here are the results for latest vs 3.26.0

Not sure there is much difference, it could just be my IPS being picky :)

## Kernel

# 1
Download: 152.45 Mbit/s
Upload: 24.22 Mbit/s

#2
Download: 54.10 Mbit/s
Upload: 27.89 Mbit/s

#3
Download: 66.95 Mbit/s
Upload: 21.80 Mbit/s


## Go v3.26.0

# 1
Download: 66.34 Mbit/s
Upload: 53.30 Mbit/s

#2
Download: 32.39 Mbit/s
Upload: 18.78 Mbit/s


#3
Download: 26.56 Mbit/s
Upload: 13.48 Mbit/s