Operating system scenarios as Use Case Maps

Abstract

This paper summarizes the analysis, design, implementation, and performance analysis of an object-oriented operating system. The analysis applies Use Case Maps (UCMs) to provide a high-level abstraction of the behavior scenarios for state transition, character output, network access, and disk access. The UCM for state transitions is converted into a queueing network for simulation study of I/O-bound versus CPU-bound systems. An overview of the later stages emphasizes UML for architecture and detailed collaboration, as well as Java examples. The performance of the disk sub-system is analyzed by instrumenting the Java code, and the results show that design choices can affect the throughput.