Tim Mangan, a well-respected application virtualization expert, just released an interesting tool to monitor the system performance of a Hyper-V infrastructure.
Rather than relying on the Task Manager inside each Windows virtual machine, HyperV_Mon connects to Hyper-V through its WMI interface and retrieves the physical and virtual CPUs consumption data from hosts and guests.
The tool is able to recognize when a vCPU is descheduled and thus provides more precise information compared to the guest OS Task Manager.
HyperV_Mon is available for free here.