库操作系统的研究及其进展

Research and Development of Library Operating System

最早的库操作系统(Library OS,LibOS)基于外内核架构,目的是验证在用户空间管理系统资源的可行性和高性能性。但是,由于外内核还停留在研究上,实际应用中仍以宏内核和混合内核为主,因此LibOS一开始并没有引起学术界和产业界的过多关注。伴随云计算的快速发展和物联网的兴起,为了构建安全高效的Unikernel云服务和物联网微服务,LibOS成为了新的研究热点。首先总结了LibOS的基本定义和基本特点;然后提出了LibOS分类模型;接着总结了LibOS的系统架构,并详细阐述了LibOS的关键技术,包括LibOS内核基中的线程管理、CPU调度和虚拟内存管理以及LibOS功能系中的网络服务功能、文件I/O功能和设备访问功能等;最后结合已有的研究成果,探讨了LibOS面临的问题和挑战。

The earliest library operating system(LibOS)is based on exokernel,and its purpose is to verify feasibility and high performance for management system resources in user space.However,exokernel is still in the study.Macro kernel and Hybrid kernel are the main operating system architectures in actual application.So LibOS didn’t attract much attention from academia and industry at the beginning.As the rapid development of cloud computing and the rise of the Internet of Things,in order to build secure and high-performance Unikernel which is a kind of special micro-ser-vice,LibOS has become a new research hotspot.Firstly,the basic definition and features of LibOS were introduced,and the classification model of LibOS was put forward.Secondly,the architecture of LibOS was proposed and the key technologies of LibOS were described in detail,including thread management,virtual CPU scheduling,virtual memory ma-nagement in LibOS kernel base,and network service,the disk file I/O and devices access in LibOS functions,etc.Finally,based on the existing research results,this paper discussed the problems and challenges of LibOS.