Transparently bridging semantic gap in CPU management for virtualized environments

  • Authors:

  • Hwanju Kim;Hyeontaek Lim;Jinkyu Jeong;Heeseung Jo;Joonwon Lee;Seungryoul Maeng

  • Affiliations:

  • Computer Science Department, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea;Computer Science Department, School of Computer Science, Carnegie Mellon University, United States;Computer Science Department, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea;Department of Computer System Engineering, Chonbuk National University, Republic of Korea;School of Information and Communication Engineering, SungKyunKwan University, Republic of Korea;Computer Science Department, Korea Advanced Institute of Science and Technology (KAIST), Republic of Korea

  • Venue:
  • Journal of Parallel and Distributed Computing
  • Year:
  • 2011

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Abstract

Consolidated environments are progressively accommodating diverse and unpredictable workloads in conjunction with virtual desktop infrastructure and cloud computing. Unpredictable workloads, however, aggravate the semantic gap between the virtual machine monitor and guest operating systems, leading to inefficient resource management. In particular, CPU management for virtual machines has a critical impact on I/O performance in cases where the virtual machine monitor is agnostic about the internal workloads of each virtual machine. This paper presents virtual machine scheduling techniques for transparently bridging the semantic gap that is a result of consolidated workloads. To enable us to achieve this goal, we ensure that the virtual machine monitor is aware of task-level I/O-boundedness inside a virtual machine using inference techniques, thereby improving I/O performance without compromising CPU fairness. In addition, we address performance anomalies arising from the indirect use of I/O devices via a driver virtual machine at the scheduling level. The proposed techniques are implemented on the Xen virtual machine monitor and evaluated with micro-benchmarks and real workloads on Linux and Windows guest operating systems.