HyperV_Mon: a new free tool if you use Hyper-V – Whitepaper

If you use Hyper-V, or any OS virtualization platform, you know that you can't trust the Windows Task Manager from inside the VMs to tell you squat. Basically, the virtualization layer pulls the rug out from under the guest OS when it comes to CPU and the guest is clueless and assumes that whatever was paused just ate CPU the whole time.

Download: PDF White Paper