115 research outputs found
Amdahl's Reliability Law: A Simple Quantification of the Weakest-Link Phenomenon
Amdahl's performance law is a useful conceptual and pedagogical tool for imparting key ideas about performance limits and the importance of balanced system design to students and practitioners in the field. The weakest-link maxim of reliability engineering can be expressed in terms of an identical formula, giving it a quantitative basis and thus making it more convincing. Calling it 'Amdahl's reliability law' stresses the fact that it follows directly from Amdahl's speedup formula
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Stochastic automata and the problems of reliability in sequential machines
The reliability of sequential machines is an important factor in
their design and implementation. In this thesis, stochastic sequential
machine models are employed to investigate some of the problems concerning
the reliability of sequential machines. Two different methods
are used to find the reliability required of individual elements. The
first method is based on a property of stochastic matrices with a principal
entry in every row, and the second one uses the notion of entropy
for stochastic automata. These two approaches are then compared and
the first one is found to be advantageous. A survey of the literature
on stochastic automata and a method for increasing the reliability of
sequential machines by simple redundancy at the element level are also
included
Interconnection Networks with Hypercubic Skeletons
The hypercubic family of interconnection networks, encompassing the hypercube and its derivatives and variants, has a wide range of applications in parallel processing. Various problems in general complex networks can be addressed by choosing a hypercubic network as a skeleton. In this paper, we provide insight into why hypercubic networks are suitable as network skeletons and discuss a mapping scheme to take advantage of the symmetry of such networks for developing efficient algorithms
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