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”mecha-nism 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.