Brock and I chatted off list.
I'm unable to replicate the error, but I have icc 14.0.1, not 14.0. I also
don't have Lustre, which is his base case.
So there's at least 2 variables here that need to be resolved.
On Jan 9, 2014, at 11:46 AM, Brock Palen <bro...@umich.edu> wrote:
> Attached you will find a small sample code that demonstrates the problem but
> ether MPI_File_seek() or MPI_File_get_position() is screwing up on me. This
> only happens with this version of the intel compiler:
>
> Version 14.0.0.080 Build 20130728
>
> You can compile and run the example with:
>
> mpicc -g -DDEBUG mkrandfile.c -o mkrand
> mpirun -np 2 mkrand -f data -l 1
>
> 1.6.5 works with gcc 4.7.0,
> openmpi/1.6.5/gcc/4.7.0
> 0: my current offset is 0
> 1: my current offset is 8388608
>
> openmpi/1.6.5/intel/14.0
> 0: my current offset is 4294967297
> 1: my current offset is 4294967297
>
> I passed the code through ddt, and the calculations for the offset for each
> rank gets the correct values passed to MPI_File_seek() but what I get back
> from MPI_File_get_position() is the above gibberish.
>
> I also cannot produce the problem with openmpi/1.6.4/intel/13.0.1 or with
> openmpi/1.6.5/pgi/13.5
>
> Our builds all like this:
>
> PREFIX=/home/software/rhel6/openmpi-1.6.5/pgi-13.5
> MXM=/home/software/rhel6/mxm/2.0
> FCA=/home/software/rhel6/fca/2.5
> COMPILERS='CC=pgcc CXX=pgCC FC=pgf90 F77=pgf77'
> ./configure \
> --prefix=${PREFIX} \
> --mandir=${PREFIX}/man \
> --with-tm=/usr/local/torque \
> --with-openib --with-psm \
> --with-io-romio-flags='--with-file-system=testfs+ufs+nfs+lustre' \
> --with-mxm=$MXM \
> --with-fca=$FCA \
> --disable-dlopen --enable-shared \
> $COMPILERS
>
>
> Brock Palen
> www.umich.edu/~brockp
> CAEN Advanced Computing
> XSEDE Campus Champion
> bro...@umich.edu
> (734)936-1985
>
>
>
> <mkrandfiles.c><signature.asc>
--
Jeff Squyres
jsquy...@cisco.com
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