Diagnosing CPU utilization in the Xen virtual machine environment

In the current trend Virtual Machine Monitors (VMMs) are used as software-based solutions in the enterprise environments for building shared hardware infrastructures via virtualization. Proper utilization of the computer resources is one of the main goals of VMM. Xen is widely used VMM. The main aim of this paper is to diagnose the CPU utilization with different scenarios using the Xen VMM. This paper explains about three kinds of scenarios to diagnose the CPU utilization in Xen virtual machine environment. First scenario is to run the homogeneous virtual machines (VMs) with same memory allocation. In this scenario CPU utilization is diagnosed by adding number of homogeneous VMs to the Xen VMM with equal memory allocation to each VM. Second scenario is to run the homogeneous VMs with different memory allocation. CPU utilization is diagnosed in the second scenario by adding number of homogeneous VMs to the Xen with different sizes of memory allocation to each VM. In the third scenario CPU utilization is diagnosed by running maximum number of homogeneous VMs with same memory allocation in different memory configured systems.