WITHSHADOW Clause

REAL A(1000)

!hpf$ DISTRIBUTE(BLOCK) :: A

!hpf$ SHADOW(1) :: A

!hpf$ INDEPENDENT

DO I=1,1000

!hpf$ ON HOME(A(I)),WITHSHADOW, LOCAL

A(I)= …

END DO

• Reduce Comm. by overlapped execution

All the data access is

performed locally

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