Vol.8, No 1, 2009 pp. 149 - 163
UDC
007.52 621.397.132 629.073
ANALYSIS OF TRANSIENT FAULT TOLERANCE IN HARD REAL-TIME SYSTEMS WITH TIME REDUNDANCY
Sandra Đošić, Milun Jevtić
Department of Electronics, University of Niš, Faculty of Electronic Engineering, Serbia
E-mail: (sandra.djosic; milun.jevtic@elfak.ni.ac.rs
Abstract.
In this paper we analyze timing constrains of one fault tolerant hard real-time system with time redundancy. Our goal is to analyze the possibility of overcoming transient faults detected during tasks executions. We created and presented in the paper a program which can help us estimate a probability of overcoming a transient fault in a real-time system. We also created a program for visual presentation of execution sequences for all tasks in a real-time system with a rate monotonic scheduling algorithm. With both created programs we can do different analysis with real-time systems and also see graphical model of tasks scheduling.
Key Words:
Real-time systems, Fault tolerance, Time redundancy.
ANALIZA TOLERANCIJE PROLAZNIH OTKAZA U HRTS-U SA VREMENSKOM REDUNDANSOM
Ovaj rad se bavi analizom vremenskih karakteristika sistema koji rade u realnom vremenu (RTS) i koji u određenoj meri imaju sposobnost tolerisanja prolaznih otkaza. U radu su prikazana dva realizovana alata za analizu rada RTS-a. Prvi alat omogućava procenu kolika je mogućnost prevazilaženja prolaznih otkaza u jednom upravljačko procesnom RTS-u sa rigidnim vremenskim ograničenjima (HRTS) korišćenjem vremenske redundanse. Drugi omogućava simulaciju rada rate monotonic algoritma i vizulenu prezentaciju toka izvršavanja zadataka jednog RTS-a.
Ključne reči:
Sistemi za rad u realnom vremenu, Tolerisanja otkaza, Vremenska redundansa.
