Basic HTML version of Foils prepared 15 March 1996

Foil 46 Extension of Space-Time Picture to treat Hierarchial memory and caches etc.

From Complex Systems and Parallel Computing CPSP713 Case studies in Computational Science -- Spring Semester 1996. by Geoffrey C. Fox
Both Distributed and Hierarchial memory need DATA LOCALITY in memory references
  • Minimize communication
  • Minimize cache miss
Hierarchal memory ----> "Time"
Distributed memory ----> "Space"
All overheads proportional to 1/[space-time volume] 1/d
with space and time decomposition (cf. BLAS-3 for Matrices)
High Performance Fortran expresses data locality ==> will improve performance of sequential machines

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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