Ceaty is at home at sourceforge:
Ceaty is a small Java tool that was created to test CPU consumption in a virtual environment were the virtual machines share the same physical machine.
Ceaty has quite a big appetite, her favorite food is CPUs with garlic sauce.
How to start Ceaty:
java -jar Ceaty.jar <threads>
Example: This will start 10 threads that will consume your CPU:
java -jar Ceaty.jar 10