Accession Number:

ADA270524

Title:

Implementation of a Portable Nested Data-Parallel Language

Descriptive Note:

Corporate Author:

CARNEGIE-MELLON UNIV PITTSBURGH PA SCHOOL OF COMPUTER SCIENCE

Report Date:

1993-02-01

Pagination or Media Count:

31.0

Abstract:

This paper gives an overview of the implementation of NESL, a portable nested data-parallel language. This language and its implementation are the first to fully support nested data structures as well as nested data- parallel function calls. These features allow the concise description of parallel algorithms on irregular data structures, such as sparse matrices and graphs. In addition, they maintain the advantages of data-parallel languages a simple programming model and portability. The current NESL implementation is based on an intermediate language called VcoDE and a library of vector routines called CVL. It runs on the Connection Machines CM-2 and CM-5, the Cray C90, and serial workstations. We compare initial benchmark results of NESL with those of machine-specific code on these machines for three algorithms least-squares line-fitting, median finding, and a sparse-matrix vector product. These results show that NESLs performance is competitive with that of machine-specific code for regular dense data, and is often superior for irregular data.

Subject Categories:

  • Computer Programming and Software

Distribution Statement:

APPROVED FOR PUBLIC RELEASE