28.12.2013 Views

Lecture 9 - Åbo Akademi

Lecture 9 - Åbo Akademi

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NoC in a nutshell<br />

• First NoC research from Philips, 2001<br />

• Circuit-switching<br />

• Could advantage e.g., high-performance computing<br />

• Dedicated circuits => increased bandwidth efficiency<br />

• No routing flexibility => network congestion: problem<br />

• Packet-switching<br />

• NIU (network interface units) make the packets from<br />

intercore data<br />

• Routers and switches connect cores via copper wiring<br />

• Routing algorithms and tables<br />

• Routing: simple logic to save host-chip performance, power<br />

• Host-chip limitations => small, energy-efficient, fast routers needed

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