Naresuan University Journal
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Deadlock Recovery in Asynchronous Networks on Chip in the Presence of Transient Faults
No full textAsynchronous Networks-on-Chip (NoCs) have been proposed as a promising infrastructure to provide scalable and efficient on-chip communication for many-core systems. Using the Quasi-delay-insensitive (QDI) implementation, asynchronous NoCs could achieve timing-robustness. However, the advancing semiconductor technology leads to shrinking transistor dimensions and increasing chip density, accelerating the occurrence of faults, especially transient faults. Transient faults emerging on QDI circuits could cause not only data errors (symbol corruption and insertion), but also deadlock. When the deadlock happens on asynchronous NoCs, it can spread over the whole network and paralyse its function. This deadlock has not been fully studied while most traditional fault-tolerant techniques cannot deal with it. Using a new model built for QDI pipelines, the formation and behaviour of the deadlock caused by transient faults are systematically studied. Using the summarized deadlock patterns, the fault position can be precisely located and the fault type can be diagnosed. A fine-grained recovery mechanism is proposed to recover the network from different deadlocks. As a design case, an asynchronous NoC is designed which can recover from the deadlock caused by both transient and permanent faults on links. Detailed experimental results are given
Software review: the KNIME workflow environment and its applications in genetic programming and machine learning
No full textSoftware comes in various forms, from the hair shirt style of the command line to fully blown, GUI-based commercial offerings. The former tends to give its users more control, but disenfranchises many other potential users who cannot themselves program yet who might otherwise benefit from it. A kind of halfway house is represented by software environments that provide both flexibility (power) and ease of use. A particular subset is represented by Workflow environments, in which loosely coupled, individual processing nodes can be ‘bolted together’ to permit complex computational operations. Taverna [7] (http://www.taverna.org.uk/) is a very well known scientific workflow system, especially in bioinformatics. It is a fully open environment, freely available, and workflows can be shared via its sister site myExperiment http://www.myexperiment.org/. It has some extensions for cheminformatics [2]. A particular strength is the means by which it can use Web services to link federated Web-based resources, a particular feature of bioinformatics
Proceedings of the Second International Workshop on FPGAs for Software Programmers (FSP 2015)
No full textThe aim of this workshop is to make FPGA and reconfigurable technology accessible to software programmers. Despite their frequently proven power and performance benefits, designing for FPGAs is mostly an engineering discipline carried out by highly trained specialists. With recent progress in high-level synthesis, a first important step towards bringing FPGA technology to potentially millions of software developers was taken. In the second edition of the FSP workshop, we will in particular focus on success stories where FPGAs had been exploited by software engineers.The FSP Workshop aims at bringing researchers and experts from both academia and industry together to discuss and exchange the latest research advances and future trends. This includes high-level compilation and languages, design automation tools that raise the abstraction level when designing for (heterogeneous) FPGAs and reconfigurable systems and standardized target platforms. This will in particular put focus on the requirements of software developers and application engineers. In addition, a distinctive feature of the workshop will be its cross section through all design levels, ranging from programming down to custom hardware. Thus, the workshop is targeting all those who are interested in understanding the big picture and the potential of domain-specific computing and software-driven FPGA development. In addition, the FSP Workshop shall facilitate collaboration of the different domains
Uranium fate during crystallisation of magnetite from ferrihydrite in conditions relevant to disposal of radioactive waste
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Topographical study of O6-alkylguanine DNA-alkyltransferase repair activity and N7- levels in resected lung and tumour tissue
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