Tuning Decompositions for Load Balance

Tuning Decompositions for Load Balance

• Static data decomposition
  • Different boundary behavior means can’t just count “mesh points”
  • Example is 3 domains, 2-d, strips, need to make edges larger for
    • boundary effects (computation)
    • communication (total smaller)
  • Rule of thumb for Matrix - equalize number of elements without breaking rows. Example of a good compromise between perfection and workability.

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Mention Baxter for Matrix balancing

Show examples with PETSc (strip)