well, but the f77 interface defines that to be an integer, unless you want to change the fortran API, you will have to map it to an MPI_Fint in my opinion.
Edgar On 12/20/2010 1:36 PM, George Bosilca wrote: > Nice catch. The sizes are MPI_Offset in C, and therefore we should not cast > them as MPI_Fint. I'll take a look, but I doubt it will be before next year. > Meanwhile, patches are always welcomed. > > george. > > On Dec 20, 2010, at 10:59 , William George wrote: > >> >> In Fortran, calls to MPI_File_get_size return a negative value >> when the file is larger that 2GB. >> >> I am using Open MPI 1.4.3 on an x86_64 system. This happens with OpenMPI >> compiled with Intel compilers or GCC, so I don't think it has >> anything to do with the particular compiler in use. >> >> I can fix this by removing the cast to MPI_Fint in >> the function mpi_file_get_size_ in ompi/mpi/f77/file_get_size_f.c. >> >> Changing: >> *size = (MPI_Fint) c_size; >> >> To: >> >> *size = c_size; >> >> >> But my guess is that this is not a proper fix. >> >> There are a few other suspicious casts to MPI_Fint in the f77 >> directory too that probably cause similar problems: >> >> $ $ grep \(MPI_Fint\) *.c >> address_f.c: *address = (MPI_Fint) addr; >> file_get_position_f.c: *offset = (MPI_Fint) c_offset; >> file_get_position_shared_f.c: *offset = (MPI_Fint) c_offset; >> file_get_size_f.c: *size = (MPI_Fint) c_size; >> file_get_view_f.c: *disp = (MPI_Fint) c_disp; >> type_extent_f.c: *extent = (MPI_Fint)c_extent; >> >> >> I can also fix this problem by compiling OpenMPI with >> the flag -i8, but promoting all Fortran INTEGERs to 8-bytes >> does not seem correct either. >> >> So - is this a configuration problem, a compile problem. >> a source code bug, or what? Is there an MPI_FOffsetint >> and/or MPI_FAddressint type that should be used >> in these casts? >> >> >> Regards, >> -- >> Bill >> >> William L. George >> National Institute of Standards and Technology >> ITL - Applied and Computational Mathematics Division, Stop 8911 >> 100 Bureau Drive >> Gaithersburg, MD 20899-8911 >> >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/devel -- Edgar Gabriel Assistant Professor Parallel Software Technologies Lab http://pstl.cs.uh.edu Department of Computer Science University of Houston Philip G. Hoffman Hall, Room 524 Houston, TX-77204, USA Tel: +1 (713) 743-3857 Fax: +1 (713) 743-3335
signature.asc
Description: OpenPGP digital signature
