The Real-Time DX Console displays the vSphere CPU ready VM metric in the CPU Ready column. See the runstate_full_contention metric for XenServer VMs to show the CPU Ready state.
However, it is not turned on by default, so you will either have to go to XenCenter and add it to the VM Performance tab, or use the XenServer PowerShell cmdlets to turn it on.
To help you implement this, you can use the Counter_on bash script attached to this article. It turns on any single performance counter, such as runstate_full_contention.