1 #include "multituner.h"
3 #include "searchtuner.h"
13 Problem::Problem(const char *_problem) : result(UNSETVALUE) {
14 uint len = strlen(_problem);
15 problem = (char *) ourmalloc(len + 1);
16 memcpy(problem, _problem, len + 1);
23 void TunerRecord::setTime(Problem *problem, long long time) {
24 timetaken.put(problem, time);
27 long long TunerRecord::getTime(Problem *problem) {
28 if (timetaken.contains(problem))
29 return timetaken.get(problem);
33 TunerRecord *TunerRecord::changeTuner(SearchTuner *_newtuner) {
34 TunerRecord *tr = new TunerRecord(_newtuner);
35 for (uint i = 0; i < problems.getSize(); i++) {
36 tr->problems.push(problems.get(i));
41 MultiTuner::MultiTuner(uint _budget, uint _rounds, uint _timeout) :
42 budget(_budget), rounds(_rounds), timeout(_timeout), execnum(0) {
45 MultiTuner::~MultiTuner() {
46 for (uint i = 0; i < problems.getSize(); i++)
47 ourfree(problems.get(i));
48 for (uint i = 0; i < allTuners.getSize(); i++)
49 delete allTuners.get(i);
52 void MultiTuner::addProblem(const char *filename) {
53 problems.push(new Problem(filename));
56 void MultiTuner::addTuner(SearchTuner *tuner) {
57 TunerRecord *t = new TunerRecord(tuner);
62 long long MultiTuner::evaluate(Problem *problem, TunerRecord *tuner) {
65 snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
66 tuner->getTuner()->serialize(buffer);
69 snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%s%u > log%u", problem->getProblem(), timeout, execnum, problem->getProblem(), execnum, execnum);
70 int status = system(buffer);
72 long long metric = -1;
76 //Read data in from results file
77 snprintf(buffer, sizeof(buffer), "result%s%u", problem->getProblem(), execnum);
80 myfile.open (buffer, ios::in);
83 if (myfile.is_open()) {
89 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
90 SearchTuner *usedtuner = new SearchTuner(buffer);
91 delete tuner->getTuner();
92 tuner->updateTuner(usedtuner);
95 //Increment execution count
98 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
99 problem->result = sat;
100 } else if (problem->result != sat && sat != IS_INDETER) {
101 model_print("******** Result has changed ********\n");
106 void MultiTuner::tuneComp() {
107 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
108 for (uint b = 0; b < budget; b++) {
109 uint tSize = tunerV->getSize();
110 for (uint i = 0; i < tSize; i++) {
111 SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
112 tunerV->push(new TunerRecord(tmpTuner));
115 Hashtable<TunerRecord *, int, uint64_t> scores;
116 for (uint i = 0; i < problems.getSize(); i++) {
117 Problem *problem = problems.get(i);
118 Vector<TunerRecord *> places;
119 for (uint j = 0; j < tunerV->getSize(); j++) {
120 TunerRecord *tuner = tunerV->get(j);
121 long long metric = tuner->getTime(problem);
123 metric = evaluate(problem, tuner);
125 tuner->setTime(problem, metric);
129 for (; k < places.getSize(); k++) {
130 if (metric < places.get(k)->getTime(problem))
133 places.insertAt(k, tuner);
137 for (uint k = 0; k < places.getSize() && points; k++) {
138 TunerRecord *tuner = places.get(k);
141 if (scores.contains(tuner))
142 currScore = scores.get(tuner);
144 scores.put(tuner, currScore);
147 Vector<TunerRecord *> ranking;
148 for (uint i = 0; i < tunerV->getSize(); i++) {
149 TunerRecord *tuner = tunerV->get(i);
151 if (scores.contains(tuner))
152 score = scores.get(tuner);
154 for (; j < ranking.getSize(); j++) {
155 TunerRecord *t = ranking.get(j);
157 if (scores.contains(t))
158 tscore = scores.get(t);
162 ranking.insertAt(j, tuner);
164 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
165 TunerRecord *tuner = ranking.get(i);
166 for (uint j = 0; j < tunerV->getSize(); j++) {
167 if (tunerV->get(j) == tuner)
174 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
175 for (uint i = 0; i < problems.getSize(); i++) {
176 Problem *problem = problems.get(i);
177 TunerRecord *bestTuner = NULL;
178 long long bestscore = 0;
179 for (uint j = 0; j < tunerV->getSize(); j++) {
180 TunerRecord *tuner = tunerV->get(j);
181 long long metric = tuner->getTime(problem);
183 metric = evaluate(problem, tuner);
185 tuner->setTime(problem, metric);
187 if ((bestTuner == NULL && metric != -1) ||
188 (metric < bestscore && metric != -1)) {
193 if (bestTuner != NULL)
194 bestTuner->problems.push(problem);
198 void clearVector(Vector<TunerRecord *> *tunerV) {
199 for (uint j = 0; j < tunerV->getSize(); j++) {
200 TunerRecord *tuner = tunerV->get(j);
201 tuner->problems.clear();
205 void MultiTuner::tuneK() {
206 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
207 for (uint i = 0; i < rounds; i++) {
209 mapProblemsToTuners(tunerV);
210 improveTuners(tunerV);
212 model_print("Best tuners\n");
213 for (uint j = 0; j < tunerV->getSize(); j++) {
214 TunerRecord *tuner = tunerV->get(j);
216 sprintf(buffer, "tuner%u.conf", j);
217 tuner->getTuner()->serialize(buffer);
218 tuner->getTuner()->print();
223 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
224 for (uint j = 0; j < tunerV->getSize(); j++) {
225 TunerRecord *tuner = tunerV->get(j);
226 TunerRecord *newtuner = tune(tuner);
227 tunerV->set(j, newtuner);
231 double MultiTuner::evaluateAll(TunerRecord *tuner) {
233 for (uint i = 0; i < tuner->problems.getSize(); i++) {
234 Problem *problem = tuner->problems.get(i);
235 long long metric = tuner->getTime(problem);
237 metric = evaluate(problem, tuner);
239 tuner->setTime(problem, metric);
242 double score = metric;
245 return pow(product, 1 / ((double)tuner->problems.getSize()));
248 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
249 SearchTuner *newTuner = oldTuner->copyUsed();
250 uint numSettings = oldTuner->getSize();
251 uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
252 if (settingsToMutate < 1)
253 settingsToMutate = 1;
254 model_print("Mutating %u settings\n", settingsToMutate);
255 while (settingsToMutate-- != 0) {
256 newTuner->randomMutate();
261 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
262 TunerRecord *bestTuner = NULL;
263 double bestScore = DBL_MAX;
265 TunerRecord *oldTuner = tuner;
266 double base_temperature = evaluateAll(oldTuner);
267 double oldScore = base_temperature;
269 for (uint i = 0; i < budget; i++) {
270 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
271 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
272 allTuners.push(newTuner);
273 double newScore = evaluateAll(newTuner);
274 newTuner->tuner->printUsed();
275 model_print("Received score %f\n", newScore);
276 double scoreDiff = newScore - oldScore; //smaller is better
277 if (newScore < bestScore) {
278 bestScore = newScore;
279 bestTuner = newTuner;
286 double currTemp = base_temperature * (((double)budget - i) / budget);
287 acceptanceP = exp(-scoreDiff / currTemp);
289 double ran = ((double)random()) / RAND_MAX;
290 if (ran <= acceptanceP) {