High-Bandwidth Packet Switching on the Raw General-Purpose Architecture Gleb Chuvpilo Saman Amarasinghe MIT LCS Computer Architecture Group September 19, 2002 Talk at a Glance Motivation Architecture of Internet Routers Raw Processor Overview Raw Router Architecture Switch Fabric Design
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MIT LCS Computer Architecture Group
September 19, 2002
SwitchFabricArchitecture of Internet Routers
4Given: Four Networks…
SPACE = |Hdr0| x … x |Hdr3| x |Token|,
where |Hdr0| = … = |Hdr3| = 5,
and |Token| = 4
SPACE = 54 x 4 = 2,500 distinct configurations
8,192/2,500 = 3.3 instructions per configuration not enough! need to use off-chip memory slow!
need to minimize SPACE
the program can fit in the local instruction memory!