/usr/share/octave/packages/mpi-1.2.0/hellostruct.m is in octave-mpi 1.2.0-4.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 | ## Copyright (C) 2009 Riccardo Corradini <riccardocorradini@yahoo.it>
## Copyright (C) 2012 Carlo de Falco
##
## This program is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free Software
## Foundation; either version 3 of the License, or (at your option) any later
## version.
##
## This program is distributed in the hope that it will be useful, but WITHOUT
## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
## details.
##
## You should have received a copy of the GNU General Public License along with
## this program; if not, see <http://www.gnu.org/licenses/>.
## -*- texinfo -*-
## @deftypefn {Function File} {} = hellostruct ()
## This function demonstrates sending and receiving a struct over MPI.
## Each process will send a a struct to process with rank 0, which will then display it.
## To run this example, set the variables HOSTFILE and NUMBER_OF_MPI_NODES to appropriate values,
## then type the following command in your shell:
## @example
## mpirun --hostfile $HOSTFILE -np $NUMBER_OF_MPI_NODES octave --eval 'pkg load mpi; hellostruct ()'
## @end example
## @seealso{hello2dimmat,helloworld,hellocell,hellosparsemat,mc_example,montecarlo,Pi}
## @end deftypefn
function hellostruct ()
MPI_Init ();
## the string NEWORLD is just a label could be whatever you want
CW = MPI_Comm_Load ("NEWORLD");
my_rank = MPI_Comm_rank (CW);
p = MPI_Comm_size (CW);
## TAG is very important to identify the message
TAG = 1;
if (my_rank != 0)
message = struct ("f1", {1 3; 2 4}, "f2", 25);
## Could be a vector containing the list of ranks identifiers;
rankvect = 0
info = MPI_Send (message, rankvect, TAG, CW);
else
for source = 1:p-1
disp ("We are at rank 0 that is master etc..");
[messagerec, info] = MPI_Recv (source, TAG, CW);
messagerec
endfor
endif
MPI_Finalize ();
endfunction
%!demo
%! system ("mpirun --hostfile $HOSTFILE -np $NUMBER_OF_MPI_NODES octave -q --eval 'pkg load mpi; hellostruct ()'");
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