document: Efficient parallel programming on scalable shared memory systems with High Performance Fortran OpenMP offers a high-level interface for parallel programming on scalable shared memory -LRB- SMP -RRB- architectures . It provides the user with simple work-sharing directives while it relies on the compiler to generate parallel programs based on thread parallelism . However , the lack of language features for exploiting data locality often results in poor performance since the non-uniform memory access times on scalable SMP machines can not be neglected . High Performance Fortran -LRB- HPF -RRB- , the de-facto standard for data parallel programming , offers a rich set of data distribution directives in order to exploit data locality , but it has been mainly targeted towards distributed memory machines . In this paper we describe an optimized execution model for HPF programs on SMP machines that avails itself with mechanisms provided by OpenMP for work sharing and thread parallelism , while exploiting data locality based on user-specified distribution directives . Data locality does not only ensure that most memory accesses are close to the executing threads and are therefore faster , but it also minimizes synchronization overheads , especially in the case of unstructured reductions . The proposed shared memory execution model for HPF relies on a small set of language extensions , which resemble the OpenMP work-sharing features . These extensions , together with an optimized shared memory parallelization and execution model , have been implemented in the ADAPTOR HPF compilation system and experimental results verify the efficiency of the chosen approach
doc_bio_tags: O B I O B I I O O B I I O O O O O O B I O B I I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O B I I O O O O O O O O O B I O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O
extractive_keyphrases: parallel programming scalable shared memory high performance fortran
abstractive_keyphrases: multiprocessor architectures scalable hardware shared memory multiprocessor