An optimal number of microprocessor units with watchdog processor

✍ Scribed by M Imaizumi; K Yasui; T Nakagawa

• Book ID: 104350785
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 427 KB
• Volume: 31
• Category: Article
• ISSN: 0895-7177
• DOI: 10.1016/s0895-7177(00)00086-8

✦ Synopsis

large number of microprocessors (UPS) have been widely used in many practical fields. A watchdog processor (WDP) is the most convenient coprocessor to monitor the behavior of a PP since it is simple and low-priced. This paper considers a system with N I.CP units, where each I.IP unit consists of PI' and WDP. When errors of a pP have occurred, a WDP detects them and resets a pP to an initial state. The reset number is checked at constant time T. If more than K resets have been made at time T, a pP becomes permanently faulty and one of other pP units in standby begins to operate. The mean time and the expected cost until system failure are derived. An optimal number N* which minimizes the expected cost is discussed.