Double standards: bringing task parallelism to HPF via the message passing interface

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High Performance Fortran (HPF) does not allow efficient expression of mixed task/data-parallel computations or the coupling of separately compiled data-parallel modules. In this paper, we show how a coordination library implementing the Message Passing Interface (MPI) can be used to represent these common parallel program structures. This library allows data-parallel tasks to exchange distributed data structures using calls to simple communication functions. We present microbenchmark results that characterize the performance of this library and that quantify the impact of optimizations that allow reuse of communication schedules in common situations. In addition, results from two-dimensional FFT, convolution, and multiblock programs demonstrate ... continued below

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18 p.

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Foster, I.; Dohr, D.R.; Krishnaiyer, R. & Choudhary, A. December 31, 1996.

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High Performance Fortran (HPF) does not allow efficient expression of mixed task/data-parallel computations or the coupling of separately compiled data-parallel modules. In this paper, we show how a coordination library implementing the Message Passing Interface (MPI) can be used to represent these common parallel program structures. This library allows data-parallel tasks to exchange distributed data structures using calls to simple communication functions. We present microbenchmark results that characterize the performance of this library and that quantify the impact of optimizations that allow reuse of communication schedules in common situations. In addition, results from two-dimensional FFT, convolution, and multiblock programs demonstrate that the HPF/MPI library can provide performance superior to that of pure HPF. WE conclude that this synergistic combination of two parallel programming standards represents a useful approach to task parallelism in a data-parallel framework, increasing the range of problems addressable in HPF without requiring complex compiler technology.

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18 p.

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OSTI as DE97003896

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  • Supercomputing `96, Pittsburgh, PA (United States), 18-22 Nov 1996

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  • Other: DE97003896
  • Report No.: ANL/MCS-P--593-0596
  • Report No.: CONF-961104--7
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 469060
  • Archival Resource Key: ark:/67531/metadc678869

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  • December 31, 1996

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  • July 25, 2015, 2:21 a.m.

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  • Dec. 14, 2015, 6:32 p.m.

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Foster, I.; Dohr, D.R.; Krishnaiyer, R. & Choudhary, A. Double standards: bringing task parallelism to HPF via the message passing interface, article, December 31, 1996; Illinois. (digital.library.unt.edu/ark:/67531/metadc678869/: accessed October 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.