Aligning auxiliary arrays

• Want to minimize communication in largest parallel loop:

  FORALL (I = K+1:N, J = K+1:N)
  
  & A(I, J) = A(I, J) – COL(I) * ROW(J)

• Suggests replicated alignments for COL and ROW:

  !HPF$ ALIGN COL(I) WITH T(I, *)
  
  !HPF$ ALIGN COL(J) WITH T(*, J)

Previous slide

Next slide

Back to first slide

View graphic version