Basic HTML version of Foils prepared 17 November 98

Foil 39 Scalable Interconnects

From Master Foilset for HPC Achitecture Overview CPS615 Introduction to Computational Science -- Fall Semester 1998. by Geoffrey C. Fox
Problem is interconnect: cost (crossbar) or bandwidth (bus)
  • Hypercube was an attempt at compromise between these two
Dance-hall: bandwidth still scalable, but lower cost than crossbar
  • latencies to memory uniform, but uniformly large
Distributed memory or non-uniform memory access (NUMA)
  • Construct shared address space out of simple message transactions across a general-purpose network (e.g. read-request, read-response)
Caching shared (particularly nonlocal) data?

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