Daniel,
ML module is not ready for production and is disabled by default.
Did you explicitly enable this module ?
If yes, I encourage you to disable it
Cheers,
Gilles
On Thursday, June 18, 2015, Daniel Letai <d...@letai.org.il> wrote:
> given a simple hello.c:
>
> #include <stdio.h>
> #include <mpi.h>
>
> int main(int argc, char* argv[])
> {
> int size, rank, len;
> char name[MPI_MAX_PROCESSOR_NAME];
>
> MPI_Init(&argc, &argv);
> MPI_Comm_size(MPI_COMM_WORLD, &size);
> MPI_Comm_rank(MPI_COMM_WORLD, &rank);
> MPI_Get_processor_name(name, &len);
>
> printf("%s: Process %d out of %d\n", name, rank, size);
>
> MPI_Finalize();ffff
> }
>
> for n=1
> mpirun -n 1 ./hello
> it works correctly.
>
> for n>1 it segfaults with signal 11
> used gdb to trace the problem to ml coll:
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x00007ffff6750845 in ml_coll_hier_barrier_setup()
> from <path to openmpi 1.8.5>/lib/openmpi/mca_coll_ml.so
>
> running with
> mpirun -n 2 --mca coll ^ml ./hello
> works correctly
>
> using mellanox ofed 2.3-2.0.5-rhel6.4-x86_64, if it's at all relevant.
> openmpi 1.8.5 was built with following options:
> rpmbuild --rebuild --define 'configure_options --with-verbs=/usr
> --with-verbs-libdir=/usr/lib64 CC=gcc CXX=g++ FC=gfortran CFLAGS="-g -O3"
> --enable-mpirun-prefix-by-default --enable-orterun-prefix-by-default
> --disable-debug --with-knem=/opt/knem-1.1.1.90mlnx
> --with-platform=optimized --without-mpi-param-check
> --with-contrib-vt-flags=--disable-iotrace --enable-builtin-atomics
> --enable-cxx-exceptions --enable-sparse-groups --enable-mpi-thread-multiple
> --enable-memchecker --enable-btl-openib-failover --with-hwloc=internal
> --with-verbs --with-x --with-slurm --with-pmi=/opt/slurm
> --with-fca=/opt/mellanox/fca --with-mxm=/opt/mellanox/mxm
> --with-hcoll=/opt/mellanox/hcoll' openmpi-1.8.5-1.src.rpm
>
> gcc version 5.1.1
>
> Thanks in advance
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> Link to this post:
> http://www.open-mpi.org/community/lists/users/2015/06/27154.php
>
