From: Chudin, Eugene (eugene_chudin_at_[hidden])
Date: 2007-05-02 14:18:52
I am trying to experiment with openmpi and following trivial code
(although runs) affects value of errno
#include <cerrno>
#include <mpi.h>
int main(int argc, char** argv)
{
int _procid, _np;
std::cout << "errno=\t" << errno << std::endl;
MPI_Init(&argc, &argv);
std::cout << "errno=\t" << errno << "\tafter MPI_Init()\t" <<
std::endl;
MPI_Comm_rank (MPI_COMM_WORLD, &_procid);
MPI_Comm_size (MPI_COMM_WORLD, &_np);
std::cout << "errno msg=\t" << strerror(errno) << "\tprocessor=\t"
<< _procid << std::endl;
MPI_Finalize();
return 0;
}
Compiled with
mpiCC -Wall test.cpp -o test
Produces following output when run just on single processor using
mpirun -np 1 --prefix /toolbox/openmpi ./test
errno= 0
errno= 2 after MPI_Init()
errno msg= No such file or directory processor= 0
When run on two processors using
mpirun -np 2 --prefix /toolbox/openmpi ./test
errno= 0
errno= 0
errno= 11 after MPI_Init()
errno= 115 after MPI_Init()
errno msg= Operation now in progress processor= 0
errno msg= Resource temporarily unavailable processor=
1
The output of ompi_info --all is attached
<<ompi_info.txt>>
------------------------------------------------------------------------------
Notice: This e-mail message, together with any attachments, contains
information of Merck & Co., Inc. (One Merck Drive, Whitehouse Station,
New Jersey, USA 08889), and/or its affiliates (which may be known
outside the United States as Merck Frosst, Merck Sharp & Dohme or MSD
and in Japan, as Banyu - direct contact information for affiliates is
available at http://www.merck.com/contact/contacts.html) that may be
confidential, proprietary copyrighted and/or legally privileged. It is
intended solely for the use of the individual or entity named on this
message. If you are not the intended recipient, and have received this
message in error, please notify us immediately by reply e-mail and then
delete it from your system.
------------------------------------------------------------------------------