Basic HTML version of Foils prepared 17 Sept 1996

Foil 80 New Data Mapping Features in HPF 2.0 - II

From New CPS615HPF and Fortran90 Discussion Sept 17 96 Basic Simulation Track for Computational Science CPS615 -- Fall Semester 96. by Geoffrey C. Fox, Tom Haupt
1 Distribution is now allowed to Processor Subsets with typical Syntax:
  • !HPF$ PROCESSORS procs(1:np)
  • !HPF$ PROCESSORS b(BLOCK) ONTO procs(1:np/2-1)
2 Distribution is allowed for Derived Types but can only be done at ONE level
  • TYPE bunch_of_meshes
    • REAL A1(100,100,100), A2(100,100,100)
    • !HPF$ DISTRIBUTE (BLOCK,CYCLIC,*) :: A1,A2
  • END TYPE
  • Another Example shows distribution outside TYPE definition
  • TYPE tree with each node having one hundred children
    • TYPE(tree) , POINTER, DIMENSION(100) :: children
    • !HPF$ DYNAMIC children
    • REAL value
  • END TYPE
  • TYPE(tree) actualtree
  • ALLOCATE ( actualtree%children) allocates POINTERs to children
  • !HPF$ REDISTRIBUTE t%children(BLOCK) distributes (for first time) these pointers
in Table To:

© on Tue Oct 7 1997