NoC design and optimization for Multi-core media processors

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CHAPTER 3. LINK MICROARCHITECTURE EXPLORATION 33Intacte [82] provides a similar capability to explore link level design options and is usedin this research.It is clear from aforementioned works that there is a need for a co-design of interconnects,processing elements and memory blocks to fully optimize the overall system-on-chipperformance. This necessitates a simulation framework which allows a co-simulation ofthe communicating entities along with ICN simulation. Additionally, to optimize powerfully, one also needs to incorporate the link-level microarchitectural choices of pipeliningetc. A System-C framework which enables NoC designers to assemble communicatingentities along with the ICN and also allows for exploration of architectural and microarchitecturalparameters of the ICN in order to obtain the latency, throughput and powertrade-offs has been developed and is presented in Section 3.2.Further, previous works largely concentrate on router power and do not take intoaccount various link microarchitectural parameters for power and performance trade-offcalculations. This chapter presents results for NoC power by considering effects of variouspipelining configurations, frequency and voltage scaling values. Various traffic generationand distribution models have been used to mimic realistic traffic patterns and activity inNoCs. Trade-off studies in this chapter consider Energy-Delay product of the NoC as theoptimization parameter.3.2 NoC Microarchitectural Exploration FrameworkThe NoC exploration framework (Figure 3.1) has been built upon Open Core Protocol-IPmodels[125] using OSCI SystemC 2.0.1[126] on Linux (2.6.8-24.25-default). The frameworkcontains Router, Link and Processing Element (PE) modules and each can be customizedviavariousparameters.TheNoCmodulescanbeinterconnectedtoformadesiredNoC. The PE module represents any communicating entity on the SoC and not just theprocessing element. We can connect an actual executable model of the entity or someabstract model representing its communication characteristics. For abstract models, wesupport many different traffic generation and communication patterns. The link modulecan be used to customize the bit-width of the links as well as the degree of pipelining
CHAPTER 3. LINK MICROARCHITECTURE EXPLORATION 34Figure 3.1: Architecture of the SystemC framework.Figure 3.2: Flow of the ICN exploration framework.in the link. A single run (Figure 3.2) uses these models to run a communication taskand outputs data files of message transfer logs. From these log files, one-way and roundtrip flit latency, throughput and link capacitance activity factors are extracted. Intacte isthen used to obtain the final power numbers for different operating frequency and supplyvoltage options. Table 3.1 summarizes the various parameters that can be varied in theframework.
Page 1 and 2: NoC Design & Optimization of Multic
Page 3 and 4: Abstractiibit data bus, 4 bit label
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Chapter 5Label Switched NoC - Motiv
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Chapter 6LS-NoC ManagementStreaming
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Chapter 8Conclusion and Future Work
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CHAPTER 8. CONCLUSION AND FUTURE WO
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CHAPTER 8. CONCLUSION AND FUTURE WO
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Appendix AInterface and Outputs of
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APPENDIXA. INTERFACEANDOUTPUTSOFTHE
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Appendix BTesting & Validation of L
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APPENDIX B. TESTING & VALIDATION OF
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APPENDIX B. TESTING & VALIDATION OF
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APPENDIX C. THE FLOW ALGORITHM 156X
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APPENDIX C. THE FLOW ALGORITHM 158E
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Bibliography[1] W.J. Dally and B. T
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BIBLIOGRAPHY 162[16] C. Hilton and
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BIBLIOGRAPHY 164[32] ErnoSalminen,T
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BIBLIOGRAPHY 166[50] Erno Salminen,
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BIBLIOGRAPHY 168[66] N. Megiddo. Op
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BIBLIOGRAPHY 170[84] B.S. Landman a
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BIBLIOGRAPHY 172[101] Michael Huang
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BIBLIOGRAPHY 174[118] J Gonzlez and
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BIBLIOGRAPHY 176[133] Ron Ho, Kenne
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NoC design and optimization for Multi-core media processors

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