Basic HTML version of Foils prepared August 29 98

Foil 25 Atmosphere Model: Agglomeration

From Designing and Building Parallel Programs I: Introduction DoD Modernization Tutorial -- 1995-1998. by Ian Foster, Gina Goff, Ehtesham Hayder, Chuck Koelbel
In horizontal
  • Clump so that 4 points per task
  • Efficiency: communicate with 4 neighbors only
In vertical, clump all points in column
  • Performance: avoid communication
  • Modularity: Reuse physics modules
Resulting algorithm "reasonably scalable"
  • (Nx.Ny)/4 : at least 1250 tasks

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