Design and implementation of a parallel array operator for the arbitrary remapping of data.

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The data redistribution or remapping functions, gather and scatter, are of long-standing in high-performance computing, having been included in Cray Fortran for decades. In this paper, we present a highly-general array operator with powerful ga.ther and scatter capa.bilities unmatched in other array languages. We discuss an efficient parallel implementation, introducing several new optimizations-run length encoding, dead army reuse, and direct conimunica.tion-that lessen the costs associa.ted with the operator's wide applicability. In our implementation of this operator in ZPL, we demonstrade comparable performance to the highly-tuned, hand-coded Fortran plus MPI versions of the NAS FT and NAS CG benchmarks.

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20 p.

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Dietz, Steven; Choi, S. E. (Sung-Eun); Chamberlain, B. L. (Bradford L.) & Snyder, Lawrence January 1, 2003.

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Description

The data redistribution or remapping functions, gather and scatter, are of long-standing in high-performance computing, having been included in Cray Fortran for decades. In this paper, we present a highly-general array operator with powerful ga.ther and scatter capa.bilities unmatched in other array languages. We discuss an efficient parallel implementation, introducing several new optimizations-run length encoding, dead army reuse, and direct conimunica.tion-that lessen the costs associa.ted with the operator's wide applicability. In our implementation of this operator in ZPL, we demonstrade comparable performance to the highly-tuned, hand-coded Fortran plus MPI versions of the NAS FT and NAS CG benchmarks.

Physical Description

20 p.

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  • Submitted to: Symposium on Principles&Practice of Parallel Program '03, June 11-13, 2003, San Diego, CA

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  • Report No.: LA-UR-03-2362
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976596
  • Archival Resource Key: ark:/67531/metadc935477

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Office of Scientific & Technical Information Technical Reports

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  • January 1, 2003

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 9, 2016, 11:04 p.m.

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Dietz, Steven; Choi, S. E. (Sung-Eun); Chamberlain, B. L. (Bradford L.) & Snyder, Lawrence. Design and implementation of a parallel array operator for the arbitrary remapping of data., article, January 1, 2003; United States. (digital.library.unt.edu/ark:/67531/metadc935477/: accessed December 10, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.