A closed queuing network model with single servers for multi-threaded architecture |
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Authors: | Vidhyacharan Bhaskar |
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Institution: | School of Electronics and Communication Engineering (ECE), SRM University, SRM Nagar, Kattankulathur 603203, Chennai, India |
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Abstract: | In this paper, a closed queuing network model with single servers for each queue is 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 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 Queue lengths Response times Utilizations Normalization constant Throughput |
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