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1. Secrets of Supercomputing Decoding the Language of Wizards Los Alamos National Laboratory

14. Data Parallel Model Serial operations are done on every processor so that replicated data is the same on every processor. This may seem like a waste of work, but it is easier than synchronizing data values. Sections of distributed data are “owned” by each processor. This is where the parallel speedups occur. Often ghost cells around each processor’s data is a way to handle communication. P(400) – distributed Ptot -- replicated Proc 1 P(1-100) Ptot Proc 2 P(101-200) Ptot Proc 3 P(201–300) Ptot Proc 4 P(301-400) Ptot