Closer: A New Design Principle for the Privileged Virtual Machine OS

Abstract : In most of today's virtualized systems (e.g., Xen), the hypervisor relies on a privileged virtual machine (pVM). The pVM accomplishes work both for the hypervisor (e.g., VM life cycle management) and for client VMs (I/O management). Usually, the pVM is based on a standard OS (Linux). This is source of performance unpredictability, low performance, resource waste, and vulnerabilities. This paper presents Closer, a principle for designing a suitable OS for the pVM. Closer consists in respectively scheduling and allocating pVM's tasks and memory as close to the involved client VM as possible. By revisiting Linux and Xen hypervisor, we present a functioning implementation of Closer. The evaluation results of our implementation show that Closer outperforms standard implementations.
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Submitted on : Friday, October 25, 2019 - 2:14:02 PM
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Djob Mvondo, Boris Teabe, Alain Tchana, Daniel Hagimont, Noel de Palma. Closer: A New Design Principle for the Privileged Virtual Machine OS. 2019 IEEE 27th International Symposium on Modeling, Analysis, and Simulation of Computer and Telecommunication Systems (MASCOTS), Oct 2019, Rennes, France. pp.49-60, ⟨10.1109/MASCOTS.2019.00016⟩. ⟨hal-02333582⟩

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