In Parallels Desktop 8 for Mac you can monitor how much CPU and memory resources are consumed inside your Virtual machine.
To do it please follow the steps below:
1. Start Parallels Desktop and launch your Virtual Machine
2. Go to Window menu ► Virtual Machines List
if you are running your Virtual machine in Coherence mode just click on icon in Mac status bar then click Alt key to get the extended list of options and then click Virtual Machines List
3. Virtual Machines List will show up
4. Now click on button to make the CPU and RAM monitors show up