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A closed queuing network model with single servers for multi-threaded architecture

APPLIED MATHEMATICAL MODELLING 2009年第9期33卷 3599-3616页

作者： Bhaskar, Vidhyacharan SRM Univ Sch Elect & Commun Engn Madras 603203 Tamil Nadu India

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. (C) 2009 Elsevier Inc. All rights reserved.

关键词： synchronization and execution processors Queue lengths Response times Utilizations Normalization constant Throughput

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A closed queuing network model with multiple servers for multi-threaded architecture

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COMPUTER COMMUNICATIONS 2008年第14期31卷 3078-3089页

作者： Bhaskar, Vidhyacharan SRM Univ Dept Elect & Commun Engn Kattankulathur 603203 Tamil Nadu India

In this paper, a closed queuing network model with multiple servers has been proposed to model data-flow 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 with multiple servers, and the steady-state balance equations are derived from it. Performance measures such as response times and 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, queue lengths, waiting times and relative utilizations are also derived. (C) 2008 Elsevier B.V. All rights reserved.

关键词： synchronization and execution processors queue lengths response times utilizations throughput

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A hybrid closed queuing network approach to model dataflow in networked distributed processors

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COMPUTER COMMUNICATIONS 2008年第1期31卷 119-128页

作者： Bhaskar, Vidhyacharan Adjallah, Kondo Hloindo SRM Univ Dept Elect & Commun Engn Kattankulathur 603203 Tamil Nadu India Univ Technol Troyes Inst Comp Sci & Engn Troyes F-10000 Troyes France

In this paper, a hybrid closed queuing network model has been proposed to model dataflow in networked distributed processing systems. 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. Both single server and multiple server models are discussed. The normalization constant is derived using a recursive algorithm for the given model. 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. (C) 2007 Published by Elsevier B.V.

关键词： synchronization and execution processors queue lengths response times utilizations and throughput

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A hybrid open queuing network model approach for multi-threaded dataflow architecture

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COMPUTER COMMUNICATIONS 2008年第17期31卷 4098-4106页

作者： Bhaskar, Vidhyacharan Adjallah, Kondo Hloindo SRM Univ Dept Elect & Commun Engn Kancheepuram District 603203 Tamil Nadu India Univ Technol Troyes Charles Delaunay Inst F-10010 Troyes France

Multi-threading has been proposed as an execution model for massively built parallel processors. Due to the large amount of potential parallelism, resource management is a critical issue in multi-threaded architecture. The challenge of multi-threading is to hide the latency by switching among a set of ready threads and thus to improve the processor utilization. Threads are dynamically scheduled to execute based on availability of data. In this paper, two hybrid open queuing network models are proposed. Two sets of processors: synchronization processors and execution processors exist. Each processor is modeled as a server serving a single-queue or multiple-servers serving a single-queue. Performance measures like response times, system throughput and average queue lengths are evaluated for both the hybrid models. The utilizations of the two models are derived and compared with each other. A mean value analysis is performed and different performance measures are plotted. Crown copyright (C) 2008 Published by Elsevier B.V. All rights reserved.

关键词： synchronization and execution processors Multi-programming Queue lengths Response times Throughput

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A hybrid closed queuing network model for multi-threaded dataflow architecture

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COMPUTERS & ELECTRICAL ENGINEERING 2005年第8期31卷 556-571页

作者： Bhaskar, V Univ Technol Troyes Dept Gen Syst Infomat & Telecommun F-10010 Troyes France

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. (c) 2005 Elsevier Ltd. All rights reserved.

关键词： synchronization and execution processors multi-programming queue lengths response times utilizations normalization constant throughput

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