The OpenMP Design Concepts

• Load balance, Scheduling overhead, Data locality, Data sharing, Synchronization.
• OpenMP is a compiler-based technique to create concurrent code from (mostly) serial code.
• OpenMP can enable (easy) parallelization of loop-based code with fork-join parallelism.

      1 
      2 pragma omp parallel
      3 pragma omp parallel for
      4 pragma omp parallel private ( i, x )
      5 pragma omp atomic
      6 pragma omp critical
      7 pragma omp for reduction(+ : sum)
  

• OpenMP performs comparably to manually-coded threading.