this post was submitted on 22 Jul 2023
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Tailscale with zero clients connected takes 7% of CPU time: is this normal? (feddit.it)
submitted 11 months ago by [email protected] to c/selfhosted
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I tried to delete and recreate the container, but there's still this insane power consumption.

For comparison, cloudflared doing a tunnel to hundreds of users takes 0.06% of CPU time on the same server

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[–] [email protected] 6 points 11 months ago* (last edited 11 months ago) (4 children)

That's weird. I closed the docker on that specific machine (ryzen 5), copied the docker-compose directory (=same config) on an i5-6500T and now it's using just 0.1% of CPU time.

Go back to ryzen and it's 8% again 🀷

[–] [email protected] 5 points 11 months ago

I just checked my AMD box and tailscale there can consume ~15% of cpu time when the tunnel is under active use. When it's not used it's ~1.5%. But it's a low power old AMD cpu though (AMD G-T56N), so I'm not use if it compares to Ryzen 5. On my intel machine, it's ~5% when under active use, and idle at ~0.5%.

[–] [email protected] 3 points 11 months ago

One thing you could try doing if you feel up to it is to build Tailscale from source code. Often when built for your specific machine, performance improves.

[–] [email protected] 2 points 11 months ago* (last edited 11 months ago)

I use tailscale on my Ruzen system, and it always stays under 1% usage. Usually below 0.5%.

[–] [email protected] 1 points 11 months ago

Isn't CPU % is per thread?