OpenNebula

There is option:

True to hide the CPU setting in the VM creation dialog. The CPU setting
will be set to the same value as VCPU, that will still be visible for the
end users

instantiate_hide_cpu: true

It is very useful for users to not be confused between CPU and vCPU parameters.

But in the intel processors hyperthreading is enabled, and users need to set CPU parameter as half of vCPU. (eg. if vCPU=1, then CPU=0.5; if vCPU=2, then CPU=1)

We must to add option to always set CPU as half of vCPU.

I think it may be like this:

instantiate_half_cpu: true

Or like this:

instantiate_cpu_factor: 0.5