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The next generation of MultiProcessor System on Chip (MPSoC) and Chip MultiProcessors (CMPs) will contain hundreds or thousands of cores. Such a many-core system requires high-performance interconnections to transfer data among the cores on the chip. Traditional system components interface with the interconnection backbone via a bus interface. This interconnection backbone can be an on-chip bus or multilayer bus architecture. With the advent of many-core architectures, the bus architecture becomes the performance bottleneck of the on-chip interconnection framework. In contrast, Network on Chip (NoC) becomes a promising on-chip communication infrastructure, which is commonly considered as an aggressive long-term approach for on-chip communications.
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