Research on an extensible real-time operating system to support integrated distributed services

编程开发正在成为新网络服务部署的瓶颈。网络系统程序需要提供高效率、复杂的硬件控制、安全、故障隔离和可接受性，以确保新功能不断增长。扩展性是一个由mayor concern because new functions constantly added. herto， to attain runtime efficiency， most network system programs are developed with hard work as monolithic kernel code.要使网络系统程序的开发和维护容易， appropriate OSs for control systems are hoped.我们已经实现了一个组件导向的OS“L4-minix”。在Karlsruhe大学设计和实现的微内核L4-ka。用户模式多服务器（内存服务器、进程服务器、文件服务器、数据服务器等）用户模式驱动程序代码和服务器malfunction isolation.有一个谣言，即微内核操作系统本身就不好，但这不是必要的。我们已经通过使用第二代微内核（L4）提供了带有散射/聚合IPC和页面缓存映射的方法，并且可以实现高度模块化的系统，只有一个小的开销。

Programming development is becoming the neck of new network service deployments. Network system programs are required to offer high efficiency, complicated hardware control, safety, fault isolation and adoptability to ever growing new features. Extensibility is a mayor concern because new functions are constantly added.Hitherto, to attain runtime efficiency, most network system programs are developed with hard work as monolithic kernel code.To make the development and maintenance of network system programs easy, appropriate OSs for control systems are hoped.We have implemented a component-oriented OS "L4-minix" characterized by:・ a micro-kernel L4-ka designed and implemented in Karlsruhe Univ.,・ user-mode multi-servers (i.e. Memory server, Process server, File server, met server, etc.),・ user-mode driver codes, and・ server malfunction isolation.There is a rumor that micro-kernel OSs are inherently inefficient, but this is not necessary true. We have proved by using the 2nd generation micro-kernel (L4) with scatter/gather IPC and page cache mapping, highly modularized systems can be realized with only a small overhead.