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Virtual Machine Monitors (VMMs) often lack the high-resolution timer events needed for demanding applications. This study evaluates five VMMs, finding their timer precision insufficient, and proposes an improved design using Xen virtualization.

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Area of Science:

  • Computer Science
  • Virtualization Technology

Background:

  • Virtual Machine Monitors (VMMs) are widely used but present challenges for high-resolution timer event generation.
  • Certain applications, like high-quality of service networking, require precise and accurate timer functionality.

Purpose of the Study:

  • To evaluate the timer event resolution and precision of popular VMMs: Xen, KVM, Qemu, VirtualBox, and VMware.
  • To demonstrate an enhanced timer design for VMMs that improves timer event resolution and precision.

Main Methods:

  • Comparative analysis of timer event resolutions and precisions across five leading VMMs.
  • Implementation and testing of a novel timer design within the Xen virtualization environment.

Main Results:

  • Existing VMMs (Xen, KVM, Qemu, VirtualBox, VMware) exhibit timer resolutions and precisions inadequate for specific high-performance applications.
  • The proposed improved timer design using Xen significantly enhances both the resolution and precision of timer events.

Conclusions:

  • Standard VMM timer functionalities are insufficient for applications demanding high timing accuracy.
  • The developed Xen-based timer design offers a viable solution for improving VMM timer performance.