Communication to Calculation Ratio as a function of template III
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
Previous slide
Next slide
Back to first slide
View graphic version