Basic HTML version of Foils prepared August 7 98

Foil 32 The REDISTRIBUTE Directive

From DoD HPF Training -- 4. HPF Data Mapping Facilities DoD Training and Others -- 1995-98. by Chuck Koelbel -- Rice University
Syntax:
  • !HPF$ REDISTRIBUTE array(dist-format-list) [ONTO processors]
  • !HPF$ REDISTRIBUTE (dist-format-list) [ONTO processors] :: array-list
Semantics:
  • Dynamically divides each dimension of array according to the corresponding pattern in dist-format-list
  • Also changes the mappings of anything already aligned to array
    • I.e., Array was previously the target in an ALIGN or REALIGN
  • Array must have the DYNAMIC attribute
  • Communicates data to its new processor home
  • Lasts until another REALIGN or REDISTRIBUTE for the same array

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