Basic HTML version of Foils prepared 26 September 1996

Foil 90 Advanced Mapping Directives -- ReDistribution and ReAlign

From HPCC Software Technologies Fall 96 -- Overview and HPF Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 26 September 96. by Geoffrey C. Fox
This example illustrates remapping from one to two dimensional decomposition for A and changing B from alignment with columns to alignment with rows
  • REAL, DIMENSION(64,64) :: A
  • REAL, DIMENSION(64) :: B
!HPF$ PROCESSORS P(64)
!HPF$ PROCESSORS Q(8,8)
!HPF$ DYNAMIC :: A,B
!HPF$ ALIGN B(:) WITH A(:,*)
!HPF$ DISTRIBUTE A(*,BLOCK)ONTO P
  • ...
!HPF$ REALIGN B(:) WITH A(*,:)
  • ...
!HPF$ REDISTRIBUTE A(CYCLIC,CYCLIC) ONTO Q
  • ...

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