[mpich-discuss] MPI_Allreduce fail. Please help. (UPDATE) (WINDOWS XP 32bit+gfortran) (Yonghui)

[Yonghui]

Thanks Anthony. 

 

That makes more sense. If I am correct the MPI_IN_PLACE for fortran is just
a number since there is no way to visit a memory address directly by
fortran. And the fortran subroutines are just wrappers of c functions. So if
MPI_Allreduce (MPI_IN_PLACE, ..) is used and when the send buf is 0
(MPI_IN_PLACE), the actual parameter which passed to a c function should be
0xffffffff (the MPI_IN_PLACE defined in the c header), right?

 

Yonghui

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