[petsc-users] question about MPI_Bcast and 64-bit-indices

[Randall Mackie]

Thanks Barry and Jose.


> On Nov 27, 2015, at 10:27 AM, Barry Smith <bsmith at mcs.anl.gov> wrote:
> 
> 
>   Use MPIU_INTEGER for Fortran
> 
> 
>> On Nov 27, 2015, at 12:09 PM, Jose E. Roman <jroman at dsic.upv.es> wrote:
>> 
>> 
>>> El 27 nov 2015, a las 19:00, Randall Mackie <rlmackie862 at gmail.com> escribió:
>>> 
>>> If my program is compiled using 64-bit-indices, and I have an integer variable defined as PetscInt, what is the right way to broadcast that using MPI_Bcast?
>>> 
>>> I currently have:
>>> 
>>> call MPI_Bcast(n, 1, MPI_INTEGER, …
>>> 
>>> which is the right way to do it for regular integers, but what do I use in place of MPI_INTEGER when Petsc is compiled with 64-bit-indices.
>>> 
>>> 
>>> Thanks,
>>> 
>>> Randy M.
>> 
>> There are PETSc-defined MPI types for basic PETSc datatypes: MPIU_INT for PetscInt, MPIU_SCALAR for PetscScalar, and so on. See petscsys.h for details.
>> 
>> Jose
>> 
>