the way you launch the app, you will be using ROMIO, and I am not 100% sure about how the data representation stuff is integrated with OMPI. I am pretty sure that we are not doing the right thing for OMPIO, but I will look into later this week.
Thanks Edgar On 4/29/2014 7:03 AM, Christoph Niethammer wrote: > Hello, > > It seems for me that the endianness is wrong in Open MPI's I/O for the > external32 data representation. :O > > Find attached my test programs which write the integer -30 and the double > 16.25 into a file. > Here the output on my Linux system: > > mpicc c-xdr.c -o c-xdr > mpicc mpi-io-external32.c -o mpi-io-external32 > ./c-xdr > Output file: c-xdr.dat > hexdump c-xdr.dat > 0000000 ffff e2ff 3040 0040 0000 0000 > 000000c > ./mpi-io-external32 > Output file: mpi-io-external32.dat > hexdump mpi-io-external32.dat > 0000000 ffe2 ffff 0000 0000 4000 4030 > 000000c > > > Best regards > Christoph Niethammer > > -- > > Christoph Niethammer > High Performance Computing Center Stuttgart (HLRS) > Nobelstrasse 19 > 70569 Stuttgart > > Tel: ++49(0)711-685-87203 > email: nietham...@hlrs.de > http://www.hlrs.de/people/niethammer > > > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2014/04/14648.php > -- Edgar Gabriel Associate 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
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