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Foil 16 Template in HPF

From CPS615-Introduction to Virtual Programming Lab -- Problem Architecture Continued and Start of Real HPF Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 26 September 96. by Geoffrey C. Fox *
Secs 257.7
A template is an abstract space of indexed positions (an "array of nothings")
In CMFortran terminology, Template is set of Virtual Processors -- one per data point
  • Template typically specifies precisely the full natural data parallelism that is natural for problem and HPF maps this problem parallelism onto particular machine
A template is declared by the TEMPLATE directive that specifies:
  • name of the template
  • the rank (i.e., number of dimensions)
  • the extent in each dimension
Examples:
  • CHPF$ TEMPLATE T(1000)
  • !HPF$ TEMPLATE FRED(N, 2*N)
  • *HPF$ TEMPLATE, DIMENSION(5,100,50) :: MINE, YOURS

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