AUTOMATIC SYNTHESIS OF FAULT-TOLERANCE By Ali Ebnenasir Fault-tolerance is an important property of today’s software systems as we rely on computers in our daily affairs (e.g., medical equipments, transportation systems, etc). Since it is difficult (if not impossible) to anticipate all classes of faults that perturb a program while designing that program, it is desirable to incrementally add fa...

Cloud Computing, with its great potentials in low cost and on-demand services, is an auspicious computing platform for both commercial and non-commercial computation clients. Cloud Computing aims to provide reliable services within data centres that contain servers, storage and networks. The services are delivered to the users transparently without their need to know the details of the underlyi...

Wireless Sensor Networks (WSN) are useful for monitoring of physical conditions and passing the data gathered to the required location. They are like any other system prone to failure due to limitation of resources. In this paper we address fault tolerance concept in general, give analysis to the definition of fault tolerance and terms related to it based on the system requirements. We explored...

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 When the executive or environmental context has changed, hypothesis or fault model may become outdated or invali...

A NoC architecture offers high reliability since it has multiple routes from the host to clients. A fault tolerant NoC framework is proposed which achieves maximum performance under fault. NoCs under fault become totally unfunctional. Hence the faulty components are handled separately which ensure that the network is not partitioned and results in high connectivity even under high fault. NoCs a...

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 ...