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DATA FLOW COMPUTERS

DATA FLOW COMPUTERS. Data flow computers execute the instructions as the data becomes available Data Flow architectures are highly asynchronous In the data flow architecture there is no need to store intermediate or final results, because they are passed as tokens among instructions. (cont.).

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DATA FLOW COMPUTERS

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  1. DATA FLOW COMPUTERS • Data flow computers execute the instructions as the data becomes available • Data Flow architectures are highly asynchronous • In the data flow architecture there is no need to store intermediate or final results, because they are passed as tokens among instructions.

  2. (cont.) • The program sequencing depends on the data availability • The information appears as operation packets and data tokens • Operation packet = opcode + operands + destination • Data tokens = data(result) +destination

  3. (cont.) • Data flow computers have packet communication architecture • Dataflow computers have distributed multiprocessor organization

  4. Classification based on data handling • Static Model • Dynamic Model

  5. Static Model • Tokens are not labeled • Uses control tokens for appropriate timing and control

  6. Dynamic Model • Uses tagged tokens

  7. Common to both models • Both models have a pipeline ring structure with the following components: • The memory • The processors • The routing network • The input/output unit

  8. Technical Problems to be solved • Develop eficient programming languages • Development of the decomposition of programs into modules and module assignment techniques. • Better control and support of intercommunication packet switched networks

  9. (cont.) • Development of intelligent data driven mechanisms • Efficient handling of complex data structures • Better memory organization for support of data flow • More accurate performance evaluation

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