A hybrid closed queuing network model for multi-threaded dataflow architecture |
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Authors: | Vidhyacharan |
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Affiliation: | Departement Genie des Systemes, d’Information et de Telecommunication, Universite de Technologic de Troyes, 12 Rue Marie Curie, 10010 Troyes Cedex, France |
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Abstract: | In this paper, a closed queuing network model with both single and multiple servers has been proposed to model dataflow in a multi-threaded architecture. Multi-threading is useful in reducing the latency by switching among a set of threads in order to improve the processor utilization. Two sets of processors, synchronization and execution processors exist. Synchronization processors handle load/store operations and execution processors handle arithmetic/logic and control operations. A closed queuing network model is suitable for large number of job arrivals. The normalization constant is derived using a recursive algorithm for the given model. State diagrams are drawn from the hybrid closed queuing network model, and the steady-state balance equations are derived from it. Performance measures such as average response times and average system throughput are derived and plotted against the total number of processors in the closed queuing network model. Other important performance measures like processor utilizations, average queue lengths, average waiting times and relative utilizations are also derived. |
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Keywords: | Synchronization and execution processors Multi-programming Queue lengths Response times Utilizations Normalization constant Throughput |
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