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The author’s research of topologies of parallel computing systems and the
tasks solved with them, including the corresponding tools of their modeling, is
summarized in the present paper. The original topological model of such
systems is presented based on the modified Amdahl law. It allowed formalizing
the dependence of the necessary number of processors and the maximal distance
between information-adjacent vertices in a graph on the directive values of
acceleration or efficiency. The dependences of these values on the system
interconnection topology and on the information graph of the parallel task are
also formalized. The tools for a comparative evaluation of these dependences,
topological criteria and the functions of scaling and fault-tolerant operation of
parallel systems are based on the author’s technique of projective description of
graphs and the algorithms used in it.
Key words: parallel computing systems, interconnect topology, graphs
projective description, topological scalability and fault-tolerance
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