Accuracy and Responsiveness of CPU Sharing Using Xen's Cap Values

The accuracy and responsiveness of the Xen CPU Scheduler is evaluated using the “cap value”mechanism provided by Xen. The goal of the evaluation is to determine whether state-of-the-art virtualization technology, and in particular Xen, enables CPU sharing that is sufficiently accurate and responsive for the purpose of enabling “flexible resource allocations” in virtualized cluster environments.