Basic HTML version of Foils prepared August 7 98

Foil 31 The REALIGN Directive

From DoD HPF Training -- 4. HPF Data Mapping Facilities DoD Training and Others -- 1995-98. by Chuck Koelbel -- Rice University
1 Syntax:
  • !HPF$ REALIGN array(source-list) WITH target(subscript-list)
  • !HPF$ REALIGN (source-list) WITH target(subscript-list) :: array-list
2 Semantics:
  • Creates a dynamic relationship between array and target so that for all values of the source-list variables, array(source-list) and target(subscript-list) are stored on the same processor
  • Array must have the DYNAMIC attribute
  • Ends any previous ALIGN or DISTRIBUTE for array
  • Communicates data already in array to its new home
  • Lasts until another REALIGN or REDISTRIBUTE for the same array
    • I.e., Not static scope
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