Efficient parallelization of unstructured reductions on shared memory parallel architectures

This paper presents a new parallelization method for an efficient implementation of unstructured array reductions on shared memory parallel machines with OpenMP. This method is strongly related to parallelization techniques for irregular reductions on distributed memory machines as employed in the context of High Performance Fortran. By exploiting data locality, synchronization is minimized without introducing severe memory or computational overheads as observed with most existing shared memory parallelization techniques.