Hello,
I have an application in C++(main.cpp) that is launched with multiple
processes via mpirun. Master process calls matlab via system('matlab
-nosplash -nodisplay -nojvm -nodesktop -r "interface"'), which executes
simple script interface.m that calls mexFunction (mexsolve.cpp) from which
I try to set up communication with the rest of the processes launched at
the beginning together with the master process. When I run the application
as listed below on two different machines I experience:
1) crash at MPI_Init() in the mexFunction() on cluster machine with
Linux 4.4.0-22-generic
2) error in MPI_Send() shown below on local machine with
Linux 3.10.0-229.el7.x86_64
[archimedes:31962] shmem: mmap: an error occurred while determining whether
or not
/tmp/openmpi-sessions-1007@archimedes_0/58444/1/shared_mem_pool.archimedes
could be created.
[archimedes:31962] create_and_attach: unable to create shared memory BTL
coordinating structure :: size 134217728
[archimedes:31962] shmem: mmap: an error occurred while determining whether
or not
/tmp/openmpi-sessions-1007@archimedes_0/58444/1/0/vader_segment.archimedes.0
could be created.
[archimedes][[58444,1],0][../../../../../opal/mca/btl/tcp/
btl_tcp_endpoint.c:800:mca_btl_tcp_endpoint_complete_connect] connect() to
<MY_IP> failed: Connection refused (111)
I launch application as following:
mpirun --mca mpi_warn_on_fork 0 --mca btl_openib_want_fork_support 1 -np 2
-npernode 1 ./main
I have openmpi-2.0.1 configured with --prefix=${INSTALLDIR}
--enable-mpi-fortran=all --with-pmi --disable-dlopen
For more details, the code is here: https://github.com/goghino/matlabMpiC
Thanks for any suggestions!
Juraj
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