Basic HTML version of Foils prepared February 13 00

Foil 25 Communication to Calculation Ratio as a function of template III

From Master Set for Parallel Programming for Laplace's Equation CPS615 Spring Semester 00 -- February 00. by Geoffrey C. Fox
For Jacobi with diagonal neighbors, we have
Calculation 9 n tfloat
Communication 4(?n + 1 ) tcomm
Communication Overhead fcomm = 0.5 tcomm/(?n tfloat)
Quite a bit smaller
Update Stencil
Communicated Updated Processor Boundaries

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