Loop transformations for performance and message latency hiding in parallel object-oriented frameworks

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Application codes reliably achieve performance far less than the advertised capabilities of existing architectures, and this problem is worsening with increasingly-parallel machines. For large-scale numerical applications, stencil operations often impose the greater part of the computational cost, and the primary sources of inefficiency are the costs of message passing and poor cache utilization. This paper proposes and demonstrates optimizations for stencil and stencil-like computations for both serial and parallel environments that ameliorate these sources of inefficiency. Additionally, the authors argue that when stencil-like computations are encoded at a high level using object-oriented parallel array class libraries these optimizations, which are ... continued below

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7 p.

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Bassetti, F.; Davis, K. & Quinlan, D. September 1, 1998.

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Description

Application codes reliably achieve performance far less than the advertised capabilities of existing architectures, and this problem is worsening with increasingly-parallel machines. For large-scale numerical applications, stencil operations often impose the greater part of the computational cost, and the primary sources of inefficiency are the costs of message passing and poor cache utilization. This paper proposes and demonstrates optimizations for stencil and stencil-like computations for both serial and parallel environments that ameliorate these sources of inefficiency. Additionally, the authors argue that when stencil-like computations are encoded at a high level using object-oriented parallel array class libraries these optimizations, which are beyond the capability of compilers, may be automated.

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7 p.

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OSTI as DE98006320

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  • International conference on parallel and distributed processing techniques and applications, Las Vegas, NV (United States), 13-16 Jul 1998

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  • Other: DE98006320
  • Report No.: LA-UR--98-1019
  • Report No.: CONF-980747--
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 674717
  • Archival Resource Key: ark:/67531/metadc701984

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  • September 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 3, 2016, 1:38 p.m.

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Bassetti, F.; Davis, K. & Quinlan, D. Loop transformations for performance and message latency hiding in parallel object-oriented frameworks, article, September 1, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc701984/: accessed October 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.