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function RunOpenEMS_MPI(Sim_Path, Sim_File, opts, Settings)
% function RunOpenEMS_MPI(Sim_Path, Sim_File, NrProc, opts, Settings)
%
% Run an openEMS simulation with MPI support
%
% % mpi binary path on all nodes needed
% Settings.MPI.Binary = '/opt/openEMS/openEMS';
% % number of processes to run
% Settings.MPI.NrProc = 3;
% % define the mpi hosts :
% Settings.MPI.Hosts = {'host1','host2','host3'};
%
% RunOpenEMS(Sim_Path, Sim_File, NrProc, opts, Settings)
%
% See also SetupMPI, WriteOpenEMS, RunOpenEMS
%
% openEMS matlab interface
% -----------------------
% author: Thorsten Liebig
if (isunix ~= 1)
error 'MPI version of openEMS currently only available using Linux'
end
if nargin < 4
error 'missing arguments: specify the Sim_Path, Sim_file, opts and Settings...'
end
NrProc = Settings.MPI.NrProc;
if (NrProc<2)
error('openEMS:RunOpenEMS_MPI','MPI number of processes to small...');
end
if ~isfield(Settings,'MPI')
error('openEMS:RunOpenEMS_MPI','MPI settings not found...');
end
savePath = pwd;
cd(Sim_Path);
scp_options = '-C -o "PasswordAuthentication no" -o "StrictHostKeyChecking no"';
ssh_options = [scp_options ' -x'];
if isfield(Settings.MPI,'Hosts')
Remote_Nodes = Settings.MPI.Hosts;
HostList = '';
for n=1:numel(Remote_Nodes)
remote_name = Remote_Nodes{n};
if (n==1)
[status, result] = unix(['ssh ' ssh_options ' ' remote_name ' "mktemp -d /tmp/openEMS_MPI_XXXXXXXXXXXX"']);
if (status~=0)
disp(result);
error('openEMS:RunOpenEMS','mktemp failed to create tmp directory!');
end
work_path = strtrim(result); %remove tailing \n
HostList = remote_name;
else
[status, result] = unix(['ssh ' ssh_options ' ' remote_name ' "mkdir ' work_path '"']);
if (status~=0)
disp(result);
error('openEMS:RunOpenEMS',['mkdir failed to create tmp directory on remote ' remote_name ' !']);
end
HostList = [HostList ',' remote_name];
end
[stat, res] = unix(['scp ' scp_options ' * ' remote_name ':' work_path '/']);
if (stat~=0)
disp(res);
error('openEMS:RunOpenEMS',['scp to remote ' remote_name ' failed!']);
end
end
end
%run openEMS (with log file if requested)
if isfield(Settings,'LogFile')
append_unix = [' 2>&1 | tee ' Settings.LogFile];
else
append_unix = [];
end
if ~isfield(Settings.MPI,'GlobalArgs')
Settings.MPI.GlobalArgs = '';
end
if isfield(Settings.MPI,'Hosts')
disp(['Running remote openEMS_MPI in working dir: ' work_path]);
[status] = system(['mpiexec ' Settings.MPI.GlobalArgs ' -host ' HostList ' -n ' int2str(NrProc) ' -wdir ' work_path ' ' Settings.MPI.Binary ' ' Sim_File ' ' opts ' ' append_unix]);
else
disp('Running local openEMS_MPI');
[status] = system(['mpiexec ' Settings.MPI.GlobalArgs ' -n ' int2str(NrProc) ' ' Settings.MPI.Binary ' ' Sim_File ' ' opts ' ' append_unix]);
end
if (status~=0)
error('openEMS:RunOpenEMS','mpirun openEMS failed!');
end
if isfield(Settings.MPI,'Hosts')
disp( 'Remote simulation done... copying back results and cleaning up...' );
if (strncmp(work_path,'/tmp/',5)~=1) % savety precaution...
error('openEMS:RunOpenEMS','working path invalid for deletion');
end
for n=1:numel(Remote_Nodes)
remote_name = Remote_Nodes{n};
disp(['Copy data from remote node: ' remote_name]);
[stat, res] = unix(['scp -r ' scp_options ' ' remote_name ':' work_path '/* ''' pwd '''/']);
if (stat~=0);
disp(res);
error('openEMS:RunOpenEMS','remote scp failed!');
end
%cleanup
[stat, res] = unix(['ssh ' ssh_options ' ' remote_name ' rm -r ' work_path]);
if (stat~=0);
disp(res);
warning('openEMS:RunOpenEMS','remote cleanup failed!');
end
end
end
cd(savePath);
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