Dynamic memory paravirtualization transparent to guest OS  

作　　者：WANG XiaoLin SUN YiFeng LUO YingWei WANG ZhenLin LI Yu ZHANG BinBin CHEN HaoGang LI XiaoMing 

机构地区：[1]Department of Computer Science and Technology, Peking University, Beijing 100871, China [2]Department of Computer Science, Michigan Technological University,Houghton, MI 49931, USA

出　　处：《Science China(Information Sciences)》2010年第1期77-88,共12页中国科学（信息科学）（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No. 2007CB310900);the National Natural Science Foundation of China (Grant Nos. 90718028, 60873052);the National High-Tech Research & Development Program of China (Grant No. 2008AA01Z112);the MOE-Intel Information Technology Foundation (Grant No. MOE-INTEL-08-09);Zhenlin Wang is also supported by NSF Career (Grant No. CCF0643664)

摘　　要：This paper introduces dynamic paravirtualization, which imitates paravirtualization and aims at reducing VM exits of full virtualization with hardware support. In dynamic paravirtualization, VMM （virtual machine monitor） dynamically monitors and replaces the hot instructions, which cause most VM exits. It is transparent to the guest OS such that the legacy OSes can benefit from this optimization. Our study focuses on reducing the overhead of memory virtualization--dynamic memory paravirtualization （DMP）. We implant a new memory management mechanism in VMM such that all user-mode page faults can be handled by the guest OS directly without VM exits. We implement a prototype of dynamic memory paravirtulization based on a version of KVM using Intel VT. Our experimental results show that our technique essentially eliminates the overhead of VM exits caused by page faults. Dynamic memory paravirtualization can achieve the effectiveness of paravirtualization without changing the source code of guest OS.This paper introduces dynamic paravirtualization, which imitates paravirtualization and aims at reducing VM exits of full virtualization with hardware support. In dynamic paravirtualization, VMM （virtual machine monitor） dynamically monitors and replaces the hot instructions, which cause most VM exits. It is transparent to the guest OS such that the legacy OSes can benefit from this optimization. Our study focuses on reducing the overhead of memory virtualization--dynamic memory paravirtualization （DMP）. We implant a new memory management mechanism in VMM such that all user-mode page faults can be handled by the guest OS directly without VM exits. We implement a prototype of dynamic memory paravirtulization based on a version of KVM using Intel VT. Our experimental results show that our technique essentially eliminates the overhead of VM exits caused by page faults. Dynamic memory paravirtualization can achieve the effectiveness of paravirtualization without changing the source code of guest OS.

关 键 词：VIRTUALIZATION virtual machine monitor paravirtualization dynamic paravirtualization hot instructions VM exits code implantation 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TP316[自动化与计算机技术—计算机科学与技术]