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Interconnection Networks

Interconnection Networks. Lecture 8: February 12, 2007 Prof. Chung-Kuan Cheng CSE Dept, UC San Diego Winter 2007 Transcribed by Wanping Zhang. Slicing & Dicing. Concentrator Distributor Slicing. Concentrator. Sm ooth the load of bursty sources

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Interconnection Networks

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  1. Interconnection Networks Lecture 8: February 12, 2007 Prof. Chung-Kuan Cheng CSE Dept, UC San Diego Winter 2007 Transcribed by Wanping Zhang

  2. Slicing & Dicing • Concentrator • Distributor • Slicing

  3. Concentrator Smooth the load of bursty sources Make efficient use of channel bandwidth Concentrator factor:

  4. Takes one high bandwidth channel and distribute its packets over several lower bandwidth channels Distributor • Interface high bandwidth module with a network that has a lower bandwidth • Interface with a slower router • Fault tolerance

  5. Bit Slicing Control signal

  6. Dimension Slicing

  7. Channel Slicing

  8. Slicing Multi-Stage Networks 2 2 2*16 pin ports Diameter = 3Switches: 4*4*4=64 16 pin ports Diameter = 2 Switches: 4*4*2=32

  9. Routing Basics • Motivation: How to go from source to destination • Definition: • Deterministic: Routing algorithm always choose the same path between source and destination • Oblivious: Routing algorithms choose a route without considering the state of the network • Adoptive: Routing algorithms adapt to the state of the network

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