Hi,
Could anyone point me to an example of mixing boost serialization with C MPI functions?
I guess I need to use boost::mpi::oarchive. But how should I initialize the buffer parameter, and what should I pass to MPI_Send after that? More specifically, I am trying to do the following:
typedef vector <int> ParticleList_t;
#define MSG_LEN 100000
ParticleList_t sendbuf(MSG_LEN, 1), recvbuf(MSG_LEN);
mpi::packed_oarchive::buffer_type buffer(sizeof(sendbuf[0])*sendbuf.size());
mpi::packed_oarchive oa(world, buffer, boost::archive::no_header);
oa & sendbuf;
if(world.rank()==0)
MPI_Send(oa, 1, MPI_PACKED, 1, 0, MPI_COMM_WORLD);
Do I have to make sure buffer is big enough or the oarchive will handle the memory automatically? If the former, what is the correct memory size to hold a vector? I guess it should hold not just vec.data(), but also vec.size().
And lastly, oa does not appear to be the correct variable to pass to MPI_Send. Then what should I pass to MPI_Send after creating the archive?
I am asking because the boost mpi installation on our server appears to have a limitation on the message size. For example, the attached code reports an error as:
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::mpi::exception> >'
what(): MPI_Alloc_mem: MPI_Alloc_mem: Out of "special" (shared) memory
MPI Application rank 0 killed before MPI_Finalize() with signal 6