Improving machine virtualisation with 'hotplug memory'.
ABSTRACT Machine virtualisation is a key technology for server consolidation and on-demand server provisioning. To support this trend, it is essential to improve the performance of virtualisation software and enable the efficient running of many virtual machines. We present a virtualisation system that can dynamically extend the real memory of its guest virtual machines. We describe an implementation of dynamic memory extension for Linux guests running on the IBM zVM virtualisation environment. Our implementation utilises device drivers for accessing dynamic memory extensions. We show that this capability can improve utilisation and performance of the Linux guests in our virtualisation environment.
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ABSTRACT: ing with credit is permitted. To copy otherwise, to republish, to post on servers, to redistribute to lists, or to use any component of this work in other works, requires prior specific permission and/or a fee. Permissions may be requested from Publications Dept, ACM Inc., 1515 Broadway, New York, NY 10036 USA, fax +1 (212) 869-0481, or email@example.com. 2 Delta E. Bugnion, S. Devine, K. Govil, and M. Rosenblum 1. INTRODUCTION Scalable computers have moved from the research lab to the marketplace. Multiple vendors are now shipping scalable systems with configurations in the tens or even hundreds of processors. Unfortunately, the system software for these machines has often trailed hardware in reaching the functionality and reliability expected by modern computer users. Operating systems developers shoulder much of the blame for the inability to deliver on the promises of these machines. Extensive modifications to the operating system are required to efficiently support scalable ...ACM Transactions on Computer Systems 03/1998; DOI:10.1145/265924.265930 · 0.62 Impact Factor