2009-03-11 15:57:34 +01:00
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function not = set_dynare_threads(n)
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% This function sets the number of threads used by dynare's mex files.
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%
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% INPUTS
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% o n [integer] scalar specifying the number of threads to be used.
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%
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% OUTPUTS
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% o not [integer] scalar, number of threads.
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%
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% REMARKS The default value of n is the number of processors on the platform.
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% Copyright (C) 2009 Dynare Team
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%
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% This file is part of Dynare.
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%
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% Dynare is free software: you can redistribute it and/or modify
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% it under the terms of the GNU General Public License as published by
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% the Free Software Foundation, either version 3 of the License, or
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% (at your option) any later version.
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%
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% Dynare is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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% GNU General Public License for more details.
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%
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% You should have received a copy of the GNU General Public License
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% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
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not = 1;
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2009-04-03 13:01:55 +02:00
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if ~isopenmp()% This version of Dynare does not use multithreaded mex files!
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2009-03-22 11:27:38 +01:00
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disp(' ')
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disp('Multithreading is not available on your platform!')
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disp(' ')
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return
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end
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2009-03-11 15:57:34 +01:00
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MaxNumberOfThreads = maxNumCompThreads();
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if ~nargin% Default.
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not = MaxNumberOfThreads;
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setenv('DYNARE_NUM_THREADS',int2str(MaxNumberOfThreads));
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else
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if (n>MaxNumberOfThreads)
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disp(['You want to use ' int2str(n) ' threads but your platform has only ' int2str(MaxNumberOfThreads) ' processors!'])
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reply = input(['Do you really want to use ' int2str(n) ' threads ? Yes/[No]: '],'s');
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if isempty(reply)
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reply = 'No';
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end
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if strcmpi(reply,'No')
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nn = input(['Choose a number of threads between 1 and [' int2str(MaxNumberOfThreads) ']: ']);
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if isempty(nn)
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nn = MaxNumberOfThreads;
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end
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if (nn>MaxNumberOfThreads)
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disp(['To my knowledge ' int2str(nn) ' is greater than ' int2str(MaxNumberOfThreads) '!...'])
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disp(' ')
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not = set_dynare_threads(n);
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return
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end
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not = nn;
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setenv('DYNARE_NUM_THREADS',int2str(nn));
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elseif strcmpi(reply,'Yes')
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not = n;
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setenv('DYNARE_NUM_THREADS',int2str(n));
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else
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disp(['You have to answer by Yes or No...'])
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disp(' ')
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not = set_dynare_threads(n);
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return
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end
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else
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not = n;
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setenv('DYNARE_NUM_THREADS',int2str(n));
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end
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end
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