Kernel 6.8.12-9-pve higher power usage vs 6.8.12-8-pve

[BarryS83]

Since I have upgraded my V8.3 Proxmox server from kernel 6.8.12-8 to 6.8.12-9 I have noticed a measurable increase in power usage. It appears the server idles "a lot" higher than the previous kernel version.

My idle power usage (with 2 VM's and 3 containers running) was 13-14 watts with 6.8.12-8.
My idle power usage with 6.8.12-9 is 20-25 watts.

Is anyone else noticing an increase in power usage?

As I am running it as a server at home I am trying to stay as energy efficient as possible. The CPU is an AMD Ryzen 5 5560U.

 

[Ernst T.]

I assume you have also updated pve-qemu-kvmto 9.2.x-x

Have a look there: https://forum.proxmox.com/threads/plötzlich-höhere-cpu-last-bei-allen-linux-vms.163694/

 

[BarryS83]

Ah yes de QEMU-KVM was also updated. I am going to try the HPET fix as posted in your link.

Edit: I have added the argument '-machine hpet=off' to my affected VM's and can confirm idle CPU and power usage is back to its original values. Thank you for your help.

 

[florism]

Can confirm that this saves me 15 watts in Idle (in total 3 nodes). So this is really substantial