航天总线容错性能测试平台的研究与实现-计算机技术专业论文.docxVIP

哈尔 哈尔滨工业大学工程硕士学位论文 II II Abstract Due to terrible working environment, aerospace computers require high dependability. Generally, these computer systems are formed by multiple devices interconnected with buses. In the working process, faults on the buses occupy a large proportion, making a bad influence on computers’ dependability. The fault injection technique is an important means of testing fault-tolerant performance of computers, it is necessary to develop a fault injection tool aiming at buses systems. Common software or hardware fault injection has its limitations. This paper analyzes the characteristics of the target bus, and proposes hierarchical embedded fault injection method, including bus fault injections in physical layer and protocol layer, which increases the coverage of fault injection. Meanwhile, this embeded method reduces the impact and increases versatility. With this method we designed a fault-tolerant performance testing platform. The fault-tolerance performance testing platform has 4 fault injection equipments. It can not only inject fualts like stuck-at-0, stuck-at-1, bit flip into physical layer, but also modify different parts of frames in protocol layer. We can control the occurrence time and frequency of fault with transient, intermittent and permanent type. We can also choose different position and direction to inject faults. In order to verify the performance of this testing platform, we set up an experimental environment with multiple buses, and carried out fault injection experiments. The experimental results show that the platform achieves multiple types of fault injection, meet ing the design requirements. It can recycle and save the results of fault injection and feedback them to user timely, providing support for fault tolerance performance evaluation of computer systems. Keywords: bus, fault-tolerant performance testing, fault injection in physical layer, fault injection in protocol layer PAGE PAGE IV 目 录 摘 要 I HYPERLINK \l _