HPC++

• There are two conventional modes of executing an HPC++ program.

• The first is multi-threaded shared memory where the program runs within one context.

  • Parallelism comes from the parallel loops and the dynamic creation of threads.
  • This model of programming is very well suited to modest levels of parallelism.

• The second mode of program execution is an explicit SPMD model where n copies of the same program are run on n different contexts.

  • Parallelism comes from parallel execution of different tasks.
  • This model is well suited for massively parallel computers.

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