Hardware-Software complex reliability providing method of a real-time system.

This paper describes a method of determining the reliability of a hardware-software complex for real-time systems at the design stage. Reliability is one of the main aspects of hardware-software real-time information processing systems. To increase hardware reliability, it is necessary to use the redundancy of structural components such as processors and interface buses. Software reliability increases through multiversion programming. As a result, a model for calculating the reliability of a multiprocessor hardware-software real-time system with heterogeneous processors and multiversion software had been obtained. The model allows to study variety of architectures for a short period of time without significant costs typical for building prototypes and assessing reliability through trial. In the conclusion, the question about possibility of optimizing a hardware-software complex reliability based on the model is raised. Also, the methods of optimization which can be used to solve this problem are specified. [ABSTRACT FROM AUTHOR]