MPI_Info in pnetcdf

[Rajeev Thakur]

The Pnetcdf code should internally use MPI_Info_f2c.

Rajeev 

> -----Original Message-----
> From: owner-parallel-netcdf at mcs.anl.gov 
> [mailto:owner-parallel-netcdf at mcs.anl.gov] On Behalf Of Wei-keng Liao
> Sent: Sunday, June 10, 2007 12:59 AM
> To: parallel-netcdf at mcs.anl.gov
> Subject: MPI_Info in pnetcdf
> 
> 
> Pnetcdf seems to assume that data type of MPI_Info is int,
> which is OK if pnetcdf is built on top of MPICH2 (MPICH2
> type-defines MPI_Info as int.)
> 
> But MPI_Info is defined differently in MPICH1 as
>      typedef struct MPIR_Info *MPI_Info;
> 
> So, when I ran the codes below using MPICH1, I got a seg fault.
> 
> Wei-keng
> 
> ---------------------------------------------------------------
> % cat pnf_test.f90
> program pnf_test
>    implicit none
>    include 'mpif.h'
> # include "pnetcdf.inc"
> 
>    integer ierr, info, ncid
> 
>    call MPI_Init(ierr)
> 
>    call MPI_Info_create(info, ierr)
>    call MPI_Info_set(info, 'cb_buffer_size', '1048576', ierr)
> 
>    ierr = nfmpi_create(MPI_COMM_WORLD, 'testfile.nc', &
>                        NF_CLOBBER, info, ncid)
>    ierr = nfmpi_enddef(ncid)
>    ierr = nfmpi_close(ncid)
> 
>    call MPI_Info_free(info, ierr)
>    call MPI_Finalize(ierr)
> end program pnf_test
> 
>