Development of a High Performance Virtual Machine System and Performance Measurements for it

概要

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Methods to enhance performance of more than one Virtual Machine in a Virtual Machine System(VMS) are presented. These include the implementation of V=Resident Virtual Machine8, where memory is resident and real addresses are continuous, and of a fast process for Input/Output simulation(Fast I/O simulation). A VMS's practicality depends on its performance, which is decreased by its CPU overhead. It is shown that a VMS's I/O simulation overhead is dominant within its total CPU overhead. Fast I/O simulation reduces the I/O simulation overhead. Development and use of V=Resident Virtual Machines and Fast I/O simulation in a VMS has been under-taken on a HITAC M series computers, and performance measurements were obtained for this report. Performance data which confirm the effectiveness of Fast I/O simulation are presented. Fast I/O simulation reduces a VMS's CPU overhead by about 40%〜50% and significantly reduces elapsed time expansion for V=Resident Virtual Machines and for V=R Virtual Machine. Memory of V=R Virtual Machine is resident and its virtual address=real addresses except in the prefix area. As a result, performance improvement supports more than one High Performance Virtual Machine and makes it possible to apply a VMS to gradual system transition for high traffic on-line systems.
一般社団法人情報処理学会の論文
1981-07-15