[mvapich-discuss] MPI_COMM_TYPE_SHARED status ?

[Nicolas Niclausse]

Jian Lin a écrit le 13/03/2015 22:09 :
> Hi, Nicolas,
> 
> Thanks for your notes.
> 
> We cannot reproduce the issue as you mentioned. Will you please provide
> more detailed information?
> 
> There is a testing program in the MPICH test suite:
> test/mpi/comm/cmsplit_type.c. It invokes MPI_Comm_split_type with an
> MPI_COMM_TYPE_SHARED option. Can you reproduce the issue with this
> program? By setting MPITEST_VERBOSE=1, this program can print the size
> of subcommunicator.
> 
> If cmsplit_type runs correctly, can you please send us a small
> reproducer that can trigger the problem?
> 
> Either you are using cmsplit_type or your own reproducer, please tell
> us your configure options of MVAPICH2, and the command-line to
> reproduce the issue. 
> 

Hello,

the test program gives also a shared communicator of size 1:

>/home/nniclaus/softs/mvapich-2.1rc2/bin/mpichversion
MVAPICH2 Version:       2.1rc2
MVAPICH2 Release date:  Thu Mar 12 20:00:00 EDT 2014
MVAPICH2 Device:        ch3:mrail
MVAPICH2 configure:     --prefix=/home/nniclaus/softs/mvapich-2.1rc2
MVAPICH2 CC:    /home/install/gcc-4.9.0/bin/gcc    -DNDEBUG -DNVALGRIND -O2
MVAPICH2 CXX:   /home/install/gcc-4.9.0/bin/g++   -DNDEBUG -DNVALGRIND -O2
MVAPICH2 F77:   /home/install/gcc-4.9.0/bin/gfortran -L/lib -L/lib   -O2
MVAPICH2 FC:    /home/install/gcc-4.9.0/bin/gfortran   -O2

>/home/nniclaus/softs/mvapich-2.1rc2/bin/mpirun -np 2 ./cmsplit_type
Created subcommunicator of size 1
Created subcommunicator of size 1
Created subcommunicator of size 1
 No errors

what's interesting:

by default,  MV2_SUPPORT_DPM is set to 1 in my shell

>unset MV2_SUPPORT_DPM
>/home/nniclaus/softs/mvapich-2.1rc2/bin/mpirun -np 2 ./cmsplit_type
Created subcommunicator of size 2
Created subcommunicator of size 1
 No errors


-- 
Nicolas NICLAUSSE                          Service DREAM
INRIA Sophia Antipolis                     http://www-sop.inria.fr/
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