Basic HTML version of Foils prepared August 29 98

Foil 10 Shared Memory MIMD Multiprocessor

From Designing and Building Parallel Programs I: Introduction DoD Modernization Tutorial -- 1995-1998. by Ian Foster, Gina Goff, Ehtesham Hayder, Chuck Koelbel
Processors access shared memory via bus
Low latency, high bandwidth
Bus contention limits scalability
Search for scalability introduces locality
  • Cache (a form of local memory)
  • Multistage architectures (some memory closer)
Examples: Cray T90, SGI PCA, Sun

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