Could not achieve THREAD_MULTIPLE support

[positiveblue]

Hello,

I installed the library and I am starting to play with it. I have written a simple program:

#include <El.hpp>
using namespace El;

// Typedef our real and complex types to 'Real' and 'C' for convenience
typedef double Real;
typedef Complex<Real> C;


main( int argc, char* argv[] )
{
    Environment env( argc, argv );
}

However when I execute it (compiled with ElVars and a Makfile) I get this output

WARNING: Could not achieve THREAD_MULTIPLE support.

Is it normal?

[positiveblue]

I attach information from

PrintVersion(); PrintConfig(); PrintCCompilerInfo(); PrintCxxCompilerInfo();

I guess that it could be related:

Elemental version information:
Git revision: 0ffa9fc
Version: 0.86-dev
Build type: Release

Elemental configuration:
Math libraries: /usr/local/lib/libscalapack.so;-L/usr/lib -llapack -lopenblas -lm
Have FLAME bidiagonal SVD: NO
Hybrid mode: YES
Have Qt5: NO
Avoiding complex MPI: YES
Have MPI_Reducescatter_block: NO
AllReduce ReduceScatterBlock: NO
Use byte AllGathers: YES

Elemental's C compiler info:
EL_CMAKE_C_COMPILER: /usr/bin/cc
EL_MPI_C_COMPILER: /usr/bin/mpicc
EL_MPI_C_INCLUDE_PATH: /usr/lib/openmpi/include;/usr/lib/openmpi/include/openmpi
EL_MPI_C_COMPILE_FLAGS:
EL_MPI_LINK_FLAGS:
EL_MPI_C_LIBRARIES: /usr/lib/libmpi.so;/usr/lib/x86_64-linux-gnu/libdl.so;/usr/lib/x86_64-linux-gnu/libhwloc.so

Elemental's C++ compiler info:
EL_CMAKE_CXX_COMPILER: /usr/bin/c++
EL_CXX_FLAGS: -O3 -std=gnu++11 -fopenmp
EL_MPI_CXX_COMPILER: /usr/bin/mpicxx
EL_MPI_CXX_INCLUDE_PATH: /usr/lib/openmpi/include;/usr/lib/openmpi/include/openmpi
EL_MPI_CXX_COMPILE_FLAGS:
EL_MPI_LINK_FLAGS:
EL_MPI_CXX_LIBRARIES: /usr/lib/libmpi_cxx.so;/usr/lib/libmpi.so;/usr/lib/x86_64-linux-gnu/libdl.so;/usr/lib/x86_64-linux-gnu/libhwloc.so

[jeffhammond]

It is because you are using Open-MPI: open-mpi/ompi#157.

Please switch to MPICH or a derivative and wait for Open-MPI to support MPI_THREAD_MULTIPLE in a release version.

[jeffhammond]

You may be able to compile and install Open-MPI yourself with thread support. Please write their user email list for assistance.

[poulson]

Alternatively, I would recommend not building in Hybrid mode, in which case the warning would go away (and there should not be much performance degradation).

[positiveblue]

I have recompiled without the Hybrid mode activated and is working now :) Thank you.