On 03/13/2016 12:21 PM, George Bosilca wrote:
Eric,
A quick grep in Open MPI source indicates that the only 2 places where
MPI_ERR_UNSUPPORTED_DATAREP is issue are deep inside the imported ROMIO
code (3.14):
./ompi/mca/io/romio314/romio/adio/include/adioi_errmsg.h:70:MPI_ERR_UNSUPPORTED_DATAREP
./ompi/mca/io/romio314/romio/adio/include/mpio_error.h:74:/*
MPI_ERR_UNSUPPORTED_DATAREP */
./ompi/mca/io/romio314/romio/mpi-io/set_view.c:138: MPI_ERR_UNSUPPORTED_DATAREP,
The culprit seems to be the set_view.c code, where
MPI_ERR_UNSUPPORTED_DATAREP is generated for any data rep that is not
extenal32. This also explains why you get a similar issue with MPICH, we
both share the same ROMIO code (maybe few minor versions apart).
You just hit one of these obscure MPI features that few ever use (and
you’re one of them!). The quickest option I can see for you at this
point is either to fallback on the “external32” format when you generate
the file (on the 64 bits architecture) to get an architecture-agnostic
output, or to rely on saving External Data Representation (XDR) yourself.
On mpich's discussion list the point was made that libraries like HDF5
and (Parallel-)NetCDF provide not only the sort of platform portability
Eric desires, but also provide a self-describing file format.
==rob
George.
On Mar 12, 2016, at 22:26 , Éric Chamberland
<eric.chamberl...@giref.ulaval.ca
<mailto:eric.chamberl...@giref.ulaval.ca>> wrote:
ERROR Returned by MPI: 51
ERROR_string Returned by MPI: MPI_ERR_UNSUPPORTED_DATAREP: data
representation not supported
which is pretty similar to MPICH output...
So I am completely stuck into implementing a solution to read/write
"native" 64 bits datarep files from a 32 bits architecture...
Isn't that into the MPI-2 standard? Does it means that no MPI
implementation is standard compliant? >:)
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