root / synthbench / euroben-dm / mod2i / dcheck.f @ 0:839f52ef7657
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Subroutine dcheck( data, num, ok ) |
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! --------------------------------------------------------------------- |
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! --- 'dcheck' checks sort runs on 8-byte Real arrays. |
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! --------------------------------------------------------------------- |
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Use numerics |
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Use dist_module |
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Implicit None |
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Include 'mpif.h' |
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|
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Integer :: num |
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Real(l_) :: data(num) |
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Logical :: ok |
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|
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Integer :: i, ier, status(MPI_Status_Size) |
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Integer :: itag |
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Real(l_) :: exval |
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! --------------------------------------------------------------------- |
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Do i = 2, num |
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ok = ok .AND. ( data(i) - data(i-1) >= 0.0_l_ ) |
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End Do |
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itag = 22222 |
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If ( nodes == 1 ) Return |
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If ( me > 0 ) Call MPI_Send( data(1), 1, MPI_Real8, |
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& me - 1, itag, MPI_Comm_World, ier ) |
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If ( me < nodes - 1 ) Call MPI_Recv( exval, 1, MPI_Real8, |
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& me + 1, itag, MPI_Comm_World, |
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& status, ier ) |
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If ( me < nodes - 1 ) ok = ok .AND. |
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& ( exval - data(num) >= 0.0_l_ ) |
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! --------------------------------------------------------------------- |
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End Subroutine dcheck |