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%u > log%u", problem->getProblem(), timeout, execnum, 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%u", execnum);
80 myfile.open (buffer, ios::in);
83 if (myfile.is_open()) {
89 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
90 tuner->getTuner()->addUsed(buffer);
92 //Increment execution count
95 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
96 problem->result = sat;
97 } else if (problem->result != sat && sat != IS_INDETER) {
98 model_print("******** Result has changed ********\n");
103 void MultiTuner::tuneComp() {
104 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
105 for (uint b = 0; b < budget; b++) {
106 uint tSize = tunerV->getSize();
107 for (uint i = 0; i < tSize; i++) {
108 SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
109 tunerV->push(new TunerRecord(tmpTuner));
112 Hashtable<TunerRecord *, int, uint64_t> scores;
113 for (uint i = 0; i < problems.getSize(); i++) {
114 Problem *problem = problems.get(i);
115 Vector<TunerRecord *> places;
116 for (uint j = 0; j < tunerV->getSize(); j++) {
117 TunerRecord *tuner = tunerV->get(j);
118 long long metric = tuner->getTime(problem);
120 metric = evaluate(problem, tuner);
122 tuner->setTime(problem, metric);
126 for (; k < places.getSize(); k++) {
127 if (metric < places.get(k)->getTime(problem))
130 places.insertAt(k, tuner);
134 for (uint k = 0; k < places.getSize() && points; k++) {
135 TunerRecord *tuner = places.get(k);
138 if (scores.contains(tuner))
139 currScore = scores.get(tuner);
141 scores.put(tuner, currScore);
144 Vector<TunerRecord *> ranking;
145 for (uint i = 0; i < tunerV->getSize(); i++) {
146 TunerRecord *tuner = tunerV->get(i);
148 if (scores.contains(tuner))
149 score = scores.get(tuner);
151 for (; j < ranking.getSize(); j++) {
152 TunerRecord *t = ranking.get(j);
154 if (scores.contains(t))
155 tscore = scores.get(t);
159 ranking.insertAt(j, tuner);
161 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
162 TunerRecord *tuner = ranking.get(i);
163 for (uint j = 0; j < tunerV->getSize(); j++) {
164 if (tunerV->get(j) == tuner)
171 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
172 for (uint i = 0; i < problems.getSize(); i++) {
173 Problem *problem = problems.get(i);
174 TunerRecord *bestTuner = NULL;
175 long long bestscore = 0;
176 for (uint j = 0; j < tunerV->getSize(); j++) {
177 TunerRecord *tuner = tunerV->get(j);
178 long long metric = tuner->getTime(problem);
180 metric = evaluate(problem, tuner);
182 tuner->setTime(problem, metric);
184 if ((bestTuner == NULL && metric != -1) ||
185 (metric < bestscore && metric != -1)) {
190 if (bestTuner != NULL)
191 bestTuner->problems.push(problem);
195 void clearVector(Vector<TunerRecord *> *tunerV) {
196 for (uint j = 0; j < tunerV->getSize(); j++) {
197 TunerRecord *tuner = tunerV->get(j);
198 tuner->problems.clear();
202 void MultiTuner::tuneK() {
203 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
204 for (uint i = 0; i < rounds; i++) {
206 mapProblemsToTuners(tunerV);
207 improveTuners(tunerV);
209 model_print("Best tuners\n");
210 for (uint j = 0; j < tunerV->getSize(); j++) {
211 TunerRecord *tuner = tunerV->get(j);
213 sprintf(buffer, "tuner%u.conf", j);
214 tuner->getTuner()->serialize(buffer);
215 tuner->getTuner()->print();
220 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
221 for (uint j = 0; j < tunerV->getSize(); j++) {
222 TunerRecord *tuner = tunerV->get(j);
223 TunerRecord *newtuner = tune(tuner);
224 tunerV->set(j, newtuner);
228 double MultiTuner::evaluateAll(TunerRecord *tuner) {
230 for (uint i = 0; i < tuner->problems.getSize(); i++) {
231 Problem *problem = tuner->problems.get(i);
232 long long metric = tuner->getTime(problem);
234 metric = evaluate(problem, tuner);
236 tuner->setTime(problem, metric);
239 double score = metric;
242 return pow(product, 1 / ((double)tuner->problems.getSize()));
245 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
246 SearchTuner *newTuner = oldTuner->copyUsed();
247 uint numSettings = oldTuner->getSize();
248 uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
249 if (settingsToMutate < 1)
250 settingsToMutate = 1;
251 model_print("Mutating %u settings\n", settingsToMutate);
252 while (settingsToMutate-- != 0) {
253 newTuner->randomMutate();
258 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
259 TunerRecord *bestTuner = NULL;
260 double bestScore = DBL_MAX;
262 TunerRecord *oldTuner = tuner;
263 double base_temperature = evaluateAll(oldTuner);
264 double oldScore = base_temperature;
266 for (uint i = 0; i < budget; i++) {
267 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
268 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
269 allTuners.push(newTuner);
270 double newScore = evaluateAll(newTuner);
271 newTuner->tuner->printUsed();
272 model_print("Received score %f\n", newScore);
273 double scoreDiff = newScore - oldScore; //smaller is better
274 if (newScore < bestScore) {
275 bestScore = newScore;
276 bestTuner = newTuner;
283 double currTemp = base_temperature * (((double)budget - i) / budget);
284 acceptanceP = exp(-scoreDiff / currTemp);
286 double ran = ((double)random()) / RAND_MAX;
287 if (ran <= acceptanceP) {