Basic HTML version of Foils prepared 24 August 98

Foil 28 Distributed Shared Memory Machines

From Master Foilset for CPS615 Introduction -- Material from Culler and Koelbel Computational Science for Simulations -- Fall Semester 1998. by Geoffrey C. Fox, Nancy McCracken
Combining the (dis)advantages of shared and distributed memory
Lots of hierarchical designs are appearing.
  • Typically, "shared memory nodes" with 4 to 32 processors
  • Each processor has a local cache
  • Processors within a node access shared memory
  • Nodes can get data from or put data to other nodes' memories

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