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Designing Reliable and Efficient Networks on Chips by Srinivasan Murali

By Srinivasan Murali

Developing NoC established interconnect adapted to a selected program area, enjoyable the applying functionality constraints with minimal power-area overhead is a big problem. With know-how scaling, because the geometries of on-chip units succeed in the actual limits of operation, one other vital layout problem for NoCs might be to supply dynamic (run-time) aid opposed to everlasting and intermittent faults which can ensue within the method. the aim of Designing trustworthy and effective Networks on Chips is to supply cutting-edge how you can resolve probably the most very important and time-intensive difficulties encountered in the course of NoC design.

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2) regulator would allow a burst of one packet over the required packet rate. In the rest of this chapter, we assume that the σ value is chosen to be equal to 0, so that no variation is permitted over the required rate. 3. The additional hardware consists of a saturating credit counter and a comparator. The saturating counter is incremented at rate ρ and saturates when it reaches a count of (1 + σ ). A packet is transmitted only if the credit counter is non-zero and when a packet is transmitted the counter is decremented by 1.

This is in contrast with the ×pipes architecture, where the packets are routed in a best-effort manner. The backbone of the NoC consists of switches, whose main function is to route packets from sources to destinations. Arbitrary switch connectivity is possible, allowing for implementation of any topology. , FIFOs are present on each output port. Switches also handle flow control [90] issues (we use the ACK/NACK protocol in this thesis), and resolve conflicts among packets when they overlap in requesting access to the same physical links.

While mapping the cores, from the set of all cores that satisfy the bandwidth and conflict constraints, we choose the one that minimizes the pair-wise traffic overlap with the cores that have been already mapped onto the current bus. When no more cores can be assigned to the current bus, either because the bandwidth of the bus in any of the simulation window has been saturated, or because of conflicts with the cores already mapped onto the bus, a new bus is instantiated. The process is repeated until all the cores in the design have been mapped onto a bus.

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