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Communication-Driven Codesign for Multiprocessor Systems

dc.contributor.advisorBhattacharyya, Shuvra Sen_US
dc.contributor.authorBambha, Neal Kumaren_US
dc.description.abstractSeveral trends in technology have important implications for embedded systems of the future. One trend is the increasing density and number of transistors that can be placed on a chip. This allows designers to fit more functionality into smaller devices, and to place multiple processing cores on a single chip. Another trend is the increasing emphasis on low power designs. A third trend is the appearance of bottlenecks in embedded system designs due to the limitations of long electrical interconnects, and increasing use of optical interconnects to overcome these bottlenecks. These trends lead to rapidly increasing complexity in the design process, and the necessity to develop tools that automate the process. This thesis will present techniques and algorithms for developing such tools. Automated techniques are especially important for multiprocessor designs. Programming such systems is difficult, and this is one reason why they are not as prevalent today. In this thesis we explore techniques for automating and optimizing the process of mapping applications onto system architectures containing multiple processors. We examine different processor interconnection methods and topologies, and the design implications of different levels of connectivity between the processors. Using optics, it is practical to construct processor interconnections having arbitrary topologies. This can offer advantages over regular interconnection topologies. However, existing scheduling techniques do not work in general for such arbitrarily connected systems. We present an algorithm that can be used to supplement existing scheduling techniques to enable their use with arbitrary interconnection patterns. We use our scheduling techniques to explore the larger problem of synthesizing an optimal interconnection network for a problem or group of problems. We examine the problem of optimizing synchronization costs in multiprocessor systems, and propose new architectures that reduce synchronization costs and permit efficient performance analysis. All the trends listed above combine to add dimensions to the already vast design space for embedded systems. Optimizations in embedded system design invariably reduce to searching vast design spaces. We describe a new hybrid global/local framework that combines evolutionary algorithms with problem-specific local search and demonstrate that it is more efficient in searching these spaces.en_US
dc.format.extent1424674 bytes
dc.titleCommunication-Driven Codesign for Multiprocessor Systemsen_US
dc.relation.isAvailableAtDigital Repository at the University of Marylanden_US
dc.relation.isAvailableAtUniversity of Maryland (College Park, Md.)en_US
dc.contributor.departmentElectrical Engineeringen_US
dc.subject.pqcontrolledEngineering, Electronics and Electricalen_US
dc.subject.pqcontrolledComputer Scienceen_US
dc.subject.pquncontrolledhardware/software codesignen_US
dc.subject.pquncontrolledoptical interconnectsen_US
dc.subject.pquncontrolledevolutionary algorithmen_US

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