High CPU usage after Restore on a new host

[Joe77]

Hi,

for a few months i used Proxmox on a Consumer PC (MSI mainboard with i9 12900k). Now i want to upgrade to a real server hardware (Lenovo SR630 V3, Pentium Gold 6526Y).

First i moved some LXC Containers and a Linux VM to the new PC without any issues. I did a backup on the old PC to a proxmox backup server and restored it on the new one.

The next VM to move is a Windows 11 pro. I tried the same way but after restore the Windows was very slow and the CPU load was about 30%. CPU type is set to "host". Now i tried to reinstall the virt IO driver / ballooning etc. But nothing changed. To prove i changed vom CPU type host to QEMU64 and the load was 10% then. The next change was to x86-64-v2-AES. Now the CPU load was 3-5% but x86-64-v2-AES is not very performant.

Is there anything i can do to run this Windows 11 on CPU type "host" or do i have to install it new from scratch?

My proxmox version is 8.4.16.


Kind regards

Jochen

 

[_gabriel]

You can try "max" CPU type

 

[SteveITS]

@Joe77 Have a read through threads like:

• https://forum.proxmox.com/threads/e...aes-performance-10-gbit-virtio-speeds.179064/
• https://forum.proxmox.com/threads/cpu-type-host-is-significantly-slower-than-x86-64-v2-aes.159107/

 

[Joe77]

Thank you for your reply,

i tried "Max" and x86-64-v3. Both run much smoother than "host". The 2 listed threads are new to me. Thank you. All howto/best practice i read said: coose host for best performance.

Kind regards

Jochen