Hello
Yesterday I looked at the VMM and the XML configuration files of the VMs and there were unknown to me processor (Skylake-Client-noTSX-IBRS) settings set, but according to my backups were already longer so.
My System: Intel Core i7-9700T
After I have set these to Hypervisor Default, the VMs run error-free again and the CPU Load is in the normal range.
Configuration with the problems
<cpu mode='custom' match='exact' check='partial'>
<model fallback='allow'>Skylake-Client-noTSX-IBRS</model>
</cpu>
New Config
<cpu mode='custom' match='exact' check='none'>
<model fallback='forbid'>qemu64</model>
</cpu>
The CPU load has settled down.
In the GitLab project of QEMU it was recommended to update to the latest version of QEMU 8.1.2.
Maybe this can be included in core 181.
https://gitlab.com/qemu-project/qemu/-/issues/1946
MfG Paul