Accession Number:

ADA276326

Title:

Runtime Support and Compilation Methods for User-Specified Data Distributions

Descriptive Note:

Contractor rept.

Corporate Author:

INSTITUTE FOR COMPUTER APPLICATIONS IN SCIENCE AND ENGINEERING HAMPTON VA

Report Date:

1993-12-01

Pagination or Media Count:

37.0

Abstract:

This paper describes two new ideas by which an HPF compiler can deal with irregular computations effectively. The first mechanism invokes a user specified mapping procedure via a set of compiler directives. The directives allow use of program arrays to describe graph connectivity, spatial location of array elements and computational load. The second mechanism is a simple conservative method that in many cases enables a compiler to recognize that it is possible to reuse previously computed information from inspectors e.g. communication schedules, loop iteration partitions, information that associates off-processor data copies with on-processor buffer locations. We present performance results for these mechanisms from a Fortran 90D compiler implementation.

Subject Categories:

  • Computer Programming and Software
  • Computer Hardware

Distribution Statement:

APPROVED FOR PUBLIC RELEASE