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Foil 16 Advanced Mapping Directives -- ReDistribution and ReAlign

From CPS615-Align and Distribute in HPF Delivered Lectures of CPS615 Basic Simulation Track for Computational Science -- 1 October 96. by Geoffrey C. Fox *
Secs 76.3
This example illustrates remapping from one to two dimensional decomposition for A and changing B from alignment with columns to alignment with rows
  • REAL, ARRAY(64,64) :: A
  • REAL, ARRAY(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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