Dynamic systems become more and more widespread in many application fields. This observation highlights the trend that systems are no more considered as running in a static, predefined environment. Evolution has to be taken into account and fault tolerance does not make an exception. When the executive or environmental context has changed, hypothesis or fault model may become outdated or invali...

Fault-tolerant programs are typically not only difficult to implement but also incur extra costs in terms of performance or resource consumption. Failures are typically relatively rare but the fault-tolerance overhead must be paid regardless if any failures occur during the program execution. This paper presents an approach that reduces the cost of fault-tolerance, namely, adaptations to a chan...

-----------------------------------------------------------------------ABSTRACT--------------------------------------------------------------We present in this paper as an introduction to soft computing techniques for fault tolerant systems and the terminology with different ways of achieving fault tolerance. The paper focuses on the problem of fault tolerance using soft computing techniques. T...

Permanent faults : This type of failure is persistent: it continues to exist until the faulty component is repaired or replaced. Examples of this fault are disk head crashes, software bugs, and burnt-out power supplies. Any of these faults may be either a fail-silent failure (also known as a fail-stop) or a Byzantine failure. A fail-silent fault is one where the faulty unit stops functioning an...

ÐApplication Specific Programmable Processors (ASPP) provide efficient implementation for any of m specified functionalities. Due to their flexibility and convenient performance-cost trade-offs, ASPPs are being developed by DSP, video, multimedia, and embedded IC manufacturers. In this paper, we present two low-cost approaches to graceful degradation-based permanent fault tolerance of ASPPs. AS...

This paper presents the design and implementation of configurable fault-tolerance techniques for a configurable VLIW processor. The processor can be configured for 2, 4, or 8 issue-slots with different types of execution functional units (FUs), and its instruction set architecture (ISA) is based on the VEX ISA. Separate techniques are employed to protect different modules of the processor from ...

Artificial evolution can integrate fault tolerance considerations into the automatic design process, producing inherently fault-tolerant designs without explicit redundant parts. Population dynamics can give rise to some level of fault tolerance ‘for free.’ Requirements for fault tolerance can also be incorporated into the fitness function. The practicalities of these methods are investigated, ...

Traditionally, fault tolerance has been considered a pivotal component of system design. However, as modern commodity hardware becomes increasingly reliable, building dedicated fault tolerance systems becomes unnecessary. Therefore, while in this paper we propose nothing novel and make no technical contributions, we nevertheless identify a unique approach to fault tolerance, which we dub optimi...

Fault-tolerance is the survival attribute of the real-time software system. The software should provide correct results in the face of various failures. A major technological concern for the coming years is the ever widening gap between the demand for high quality, robust software and its supply. Software fault tolerance is basically the design faults in the computer system. Its function is to ...