[mpich-discuss] MPI comm attributes not working?

[Jeff Hammond]

I guess I don't know what the right answer is for MPI_COMM_WORLD.  I'll try
that test again with attributes set only on subcomms to see how it behaves.

Jeff

On Tue, Apr 5, 2016 at 10:24 AM, Balaji, Pavan <balaji at anl.gov> wrote:

>
> Hmm.  I would think the mpich output is correct: the attributed should
> only be deleted once.  But I could be wrong.
>
>  -- Pavan
>
> > On Apr 5, 2016, at 8:10 AM, Jeff Hammond <jeff.science at gmail.com> wrote:
> >
> > My concern is the number of times the string "ibcast_delete" appears in
> the output (2 vs 1)...
> >
> > Jeff
> >
> > On Mon, Apr 4, 2016 at 10:02 PM, Balaji, Pavan <balaji at anl.gov> wrote:
> >
> > You are printing a number that's generated by the MPI implementation.
> It's value will be different for different MPI implementations.
> >
> >  -- Pavan
> >
> >> On Apr 4, 2016, at 11:56 PM, Jeff Hammond <jeff.science at gmail.com>
> wrote:
> >>
> >> I am trying to understand how communicator attributes work, so I found
> http://stackoverflow.com/questions/25198353/callbacks-provided-in-mpi-comm-create-keyval-are-not-called,
> which contains a nice example (the code in
> http://stackoverflow.com/a/25205611/2189128).
> >>
> >> However, the posted output of this code is:
> >>
> >> $ mpirun -np 1 ./comm-attr
> >> In ibcast_copy: keyval = 10
> >> In ibcast_delete: keyval = 10
> >> In ibcast_delete: keyval = 10
> >>
> >> Whereas I observe:
> >>
> >> $ mpirun -np 1 ./a.out
> >> In ibcast_copy: keyval = -1539309568
> >> In ibcast_delete: keyval = -1539309568
> >>
> >> Can anyone help me understand what the correct output of this program
> is?  If it is not what I am seeing, is this a bug in MPICH or am I doing
> something wrong?
> >>
> >> I am using MPICH git from November 2015, so I will git pull &&
> ./autogen.sh && $CONFIGUREMAKEINSTALL and try again just to be sure.
> >>
> >> Thanks,
> >>
> >> Jeff
> >>
> >> $ mpirun --version
> >> HYDRA build details:
> >>    Version:                                 3.2
> >>    Release Date:                            unreleased development copy
> >>    CC:                              icc
> >>    CXX:                             icpc
> >>    F77:                             ifort
> >>    F90:                             ifort
> >>    Configure options:                       '--disable-option-checking'
> '--prefix=/opt/mpich/dev/intel/default' 'CC=icc' 'CXX=icpc' 'FC=ifort'
> 'F77=ifort' '--enable-cxx' '--enable-fortran' '--enable-threads=runtime'
> '--enable-g=dbg' '--with-pm=hydra' '--enable-wrapper-rpath'
> '--enable-static' '--enable-shared' '--cache-file=/dev/null'
> '--srcdir=../../../../src/pm/hydra' 'CFLAGS= -g -O2' 'LDFLAGS='
> 'LIBS=-lpthread ' 'CPPFLAGS=
> -I/Users/jrhammon/Work/MPI/MPICH/git/build/src/mpl/include
> -I/Users/jrhammon/Work/MPI/MPICH/git/src/mpl/include
> -I/Users/jrhammon/Work/MPI/MPICH/git/src/openpa/src
> -I/Users/jrhammon/Work/MPI/MPICH/git/build/src/openpa/src -D_REENTRANT
> -I/Users/jrhammon/Work/MPI/MPICH/git/build/src/mpi/romio/include'
> >>    Process Manager:                         pmi
> >>    Launchers available:                     ssh rsh fork slurm ll lsf
> sge manual persist
> >>    Topology libraries available:            hwloc
> >>    Resource management kernels available:   user slurm ll lsf sge pbs
> cobalt
> >>    Checkpointing libraries available:
> >>    Demux engines available:                 poll select
> >>
> >>
> >> --
> >> Jeff Hammond
> >> jeff.science at gmail.com
> >> http://jeffhammond.github.io/
> >> _______________________________________________
> >> discuss mailing list     discuss at mpich.org
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> >
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> >
> >
> > --
> > Jeff Hammond
> > jeff.science at gmail.com
> > http://jeffhammond.github.io/
> > _______________________________________________
> > discuss mailing list     discuss at mpich.org
> > To manage subscription options or unsubscribe:
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>
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-- 
Jeff Hammond
jeff.science at gmail.com
http://jeffhammond.github.io/
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