139 lines
4.4 KiB
C++
139 lines
4.4 KiB
C++
/*
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<lesson4_topology.cpp>
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Copyright (C) DOLPHIN Project-Team, INRIA Lille - Nord Europe, 2006-2012
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Alexandre Quemy, Thibault Lasnier - INSA Rouen
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This software is governed by the CeCILL license under French law and
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abiding by the rules of distribution of free software. You can ue,
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modify and/ or redistribute the software under the terms of the CeCILL
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license as circulated by CEA, CNRS and INRIA at the following URL
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"http://www.cecill.info".
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In this respect, the user's attention is drawn to the risks associated
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with loading, using, modifying and/or developing or reproducing the
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software by the user in light of its specific status of free software,
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that may mean that it is complicated to manipulate, and that also
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therefore means that it is reserved for developers and experienced
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professionals having in-depth computer knowledge. Users are therefore
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encouraged to load and test the software's suitability as regards their
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requirements in conditions enabling the security of their systems and/or
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data to be ensured and, more generally, to use and operate it in the
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same conditions as regards security.
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The fact that you are presently reading this means that you have had
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knowledge of the CeCILL license and that you accept its terms.
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ParadisEO WebSite : http://paradiseo.gforge.inria.fr
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Contact: paradiseo-help@lists.gforge.inria.fr
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*/
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/*///////////////////////////////////////////////////////////////////
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// SMP Tutorial 4 : Advanced Island Model Mecanisms
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// This file shows how to create events called by islands.
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// In our case, we would like to change the topology after 10 seconds
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// of computation.
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/*///////////////////////////////////////////////////////////////////
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#include <smp>
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#include <eo>
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#include <chrono>
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#include "../BaseLesson.h"
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using namespace paradiseo::smp;
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using namespace std;
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/*
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Simple function to change topology of a given model, once, after 10 seconds.
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*/
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void changeTopo(IslandModel<Indi>* _model, AbstractTopology& _topo)
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{
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static auto start = std::chrono::system_clock::now();
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auto now = std::chrono::system_clock::now();
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auto elapsed = now - start;
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static bool first = false;
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if(std::chrono::duration_cast<std::chrono::milliseconds>(elapsed).count() > 10000 && !first)
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{
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std::cout << "Changing topology !" << std::endl;
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_model->setTopology(_topo);
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first = true;
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}
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}
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int main(void)
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{
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// Defining parameters
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typedef struct {
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unsigned popSize = 1000;
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unsigned tSize = 2;
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double pCross = 0.8;
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double pMut = 0.7;
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unsigned maxGen = 1000;
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} Param;
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Param param;
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// Load instance
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loadInstances("../lessonData.dat", n, bkv, a, b);
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//Common part to all islands
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IndiEvalFunc plainEval;
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IndiInit chromInit;
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eoDetTournamentSelect<Indi> selectOne(param.tSize);
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eoSelectPerc<Indi> select(selectOne);// by default rate==1
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IndiXover Xover; // CROSSOVER
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IndiSwapMutation mutationSwap; // MUTATION
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eoSGATransform<Indi> transform(Xover, param.pCross, mutationSwap, param.pMut);
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eoPlusReplacement<Indi> replace;
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// MODEL
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// Topologies
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Topology<Complete> topo;
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IslandModel<Indi> model(topo);
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// ISLAND 1
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// // Algorithm part
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eoGenContinue<Indi> genCont(param.maxGen+100);
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eoPop<Indi> pop(param.popSize, chromInit);
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// // Emigration policy
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// // // Element 1
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eoPeriodicContinue<Indi> criteria(5);
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eoDetTournamentSelect<Indi> selectOne1(20);
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eoSelectNumber<Indi> who(selectOne1, 3);
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Topology<Ring> topo2;
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/*
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We need to bind our function in a std::function object.
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Then, we create a Notifier that we add to our island thanks
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to an eoCheckPoint.
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*/
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auto task = std::bind(changeTopo, &model, topo2);
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Notifier topoChanger(task);
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eoCheckPoint<Indi> ck(genCont);
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ck.add(topoChanger);
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MigPolicy<Indi> migPolicy;
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migPolicy.push_back(PolicyElement<Indi>(who, criteria));
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// // Integration policy
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eoPlusReplacement<Indi> intPolicy;
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Island<eoEasyEA,Indi> test(pop, intPolicy, migPolicy, ck, plainEval, select, transform, replace);
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try
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{
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model.add(test);
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// The topology will change after 10 seconds of computation
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model();
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}
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catch(exception& e)
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{
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cout << "Exception: " << e.what() << '\n';
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}
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return 0;
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}
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