Remember there is a search forum feature.
https://forum.qubes-os.org/search?q=vcpu
in the first results:
Unman’s response added another piece of explanation.
To go deeper, you can type xen vcpu in your search engine. 
Remember there is a search forum feature.
https://forum.qubes-os.org/search?q=vcpu
in the first results:
Unman’s response added another piece of explanation.
To go deeper, you can type xen vcpu in your search engine.