Study on operating system architectures for supporting application-specific resource management

支持特定应用资源管理的操作系统体系结构研究

基本信息

批准号：
08680352
负责人：
SHIMIZU Kentaro
金额：
$ 1.22万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

We investigated operating system architectures for application specific resource management. Traditionally, resource management policies have been implemented inside the operating system kernel. This study explores new operating system support for user-level resource management.1. We designed and implemented a flexible mechanism for efficient lightweight threads which is implemented at the user-level in cooperation with the operating system kernel. Since most thread operations are performed at the user-level, threads can be executed efficiently by using application specific policies. The distinguished features are the coherent integration of kernel and user-level schedulers and the efficient remote procedure call mechanism which eliminates extra user-kernel interactions.2. We proposed an effective application framework for service developments. It provides the peocedural interprocess communication based on the thread migration. Basic priority inheritance protocol is applied to the interprosess communication. The proposed framework simplifies the interaction between the micro-kernel and user-level services, and ensures real-time response.3. We designed a new pathname evaluation algorithm for union mount. Unlike the conventional method, the proposed algorithm merges all the way down the layred directory trees into a name space ; each of the layred directories can have different directory tree structures ; and modifications are allowed on not only the file-systems in the front layr but also the file-systems in the layrs behind. We introduced principal rules to be used for evaluating pathnames in a hierarchcal name space composed of union mounts, and implemented these rules in a practical operating system.

我们研究了应用程序特定资源管理的操作系统架构。传统上，资源管理策略是在操作系统内核内部实现的。本研究探讨了新操作系统对用户级资源管理的支持。1．我们设计并实现了一种灵活的高效轻量级线程机制，该机制在用户层与操作系统内核配合实现。由于大多数线程操作都是在用户级别执行的，因此可以通过使用特定于应用程序的策略来有效地执行线程。显着的特点是内核和用户级调度程序的一致集成以及有效的远程过程调用机制，消除了额外的用户-内核交互。2．我们提出了一个有效的服务开发应用框架。它提供了基于线程迁移的程序间通信。进程间通信采用基本优先级继承协议。所提出的框架简化了微内核和用户级服务之间的交互，并保证了实时响应。 3．我们为联合挂载设计了一种新的路径名评估算法。与传统方法不同，所提出的算法将分层目录树一路合并到名称空间中；每个分层目录可以有不同的目录树结构；并且不仅允许修改前层文件系统，也允许修改后层文件系统。我们引入了用于评估由联合挂载组成的分层名称空间中的路径名的主要规则，并在实际操作系统中实现了这些规则。