Parallel performance of TORT on the CRAY J90: Model and measurement

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A limitation on the parallel performance of TORT on the CRAY J90 is the amount of extra work introduced by the multitasking algorithm itself. The extra work beyond that of the serial version of the code, called overhead, arises from the synchronization of the parallel tasks and the accumulation of results by the master task. The goal of recent updates to TORT was to reduce the time consumed by these activities. To help understand which components of the multitasking algorithm contribute significantly to the overhead, a parallel performance model was constructed and compared to measurements of actual timings of the ... continued below

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5 p.

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Barnett, A. & Azmy, Y.Y. October 1, 1997.

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  • Barnett, A. Lockheed Martin Corp., Schenectady, NY (United States)
  • Azmy, Y.Y. Oak Ridge National Lab., TN (United States)

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  • Knolls Atomic Power Laboratory
    Publisher Info: Knolls Atomic Power Lab., Schenectady, NY (United States)
    Place of Publication: Schenectady, New York

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Description

A limitation on the parallel performance of TORT on the CRAY J90 is the amount of extra work introduced by the multitasking algorithm itself. The extra work beyond that of the serial version of the code, called overhead, arises from the synchronization of the parallel tasks and the accumulation of results by the master task. The goal of recent updates to TORT was to reduce the time consumed by these activities. To help understand which components of the multitasking algorithm contribute significantly to the overhead, a parallel performance model was constructed and compared to measurements of actual timings of the code.

Physical Description

5 p.

Notes

INIS; OSTI as DE99001977

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  • International conference on the physics of nuclear science and technology, Long Island, NY (United States), 5-8 Oct 1998

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  • Other: DE99001977
  • Report No.: KAPL-P--000199
  • Report No.: K--97141;CONF-981003--
  • Grant Number: AC12-76SN00052
  • Office of Scientific & Technical Information Report Number: 319792
  • Archival Resource Key: ark:/67531/metadc678554

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • October 1, 1997

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 16, 2016, 5:19 p.m.

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Barnett, A. & Azmy, Y.Y. Parallel performance of TORT on the CRAY J90: Model and measurement, article, October 1, 1997; Schenectady, New York. (digital.library.unt.edu/ark:/67531/metadc678554/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.