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, SearchTuner *tuner) {
65 snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
66 tuner->serialize(buffer);
69 snprintf(buffer, sizeof(buffer), "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;
75 //Read data in from results file
76 snprintf(buffer, sizeof(buffer), "result%s%u", problem->getProblem(), execnum);
79 myfile.open (buffer, ios::in);
82 if (myfile.is_open()) {
88 //Increment execution count
91 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
92 problem->result = sat;
93 } else if (problem->result != sat && sat != IS_INDETER) {
94 model_print("******** Result has changed ********\n");
99 void MultiTuner::tuneComp() {
100 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
101 for (uint b = 0; b < budget; b++) {
102 uint tSize = tunerV->getSize();
103 for (uint i = 0; i < tSize; i++) {
104 SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
105 tunerV->push(new TunerRecord(tmpTuner));
108 Hashtable<TunerRecord *, int, uint64_t> scores;
109 for (uint i = 0; i < problems.getSize(); i++) {
110 Problem *problem = problems.get(i);
111 Vector<TunerRecord *> places;
112 for (uint j = 0; j < tunerV->getSize(); j++) {
113 TunerRecord *tuner = tunerV->get(j);
114 long long metric = tuner->getTime(problem);
116 metric = evaluate(problem, tuner->getTuner());
118 tuner->setTime(problem, metric);
122 for (; k < places.getSize(); k++) {
123 if (metric < places.get(k)->getTime(problem))
126 places.insertAt(k, tuner);
130 for (uint k = 0; k < places.getSize() && points; k++) {
131 TunerRecord *tuner = places.get(k);
134 if (scores.contains(tuner))
135 currScore = scores.get(tuner);
137 scores.put(tuner, currScore);
140 Vector<TunerRecord *> ranking;
141 for (uint i = 0; i < tunerV->getSize(); i++) {
142 TunerRecord *tuner = tunerV->get(i);
144 if (scores.contains(tuner))
145 score = scores.get(tuner);
147 for (; j < ranking.getSize(); j++) {
148 TunerRecord *t = ranking.get(j);
150 if (scores.contains(t))
151 tscore = scores.get(t);
155 ranking.insertAt(j, tuner);
157 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
158 TunerRecord * tuner = ranking.get(i);
159 for(uint j = 0; j < tunerV->getSize(); j++) {
160 if (tunerV->get(j) == tuner)
167 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
168 for (uint i = 0; i < problems.getSize(); i++) {
169 Problem *problem = problems.get(i);
170 TunerRecord *bestTuner = NULL;
171 long long bestscore = 0;
172 for (uint j = 0; j < tunerV->getSize(); j++) {
173 TunerRecord *tuner = tunerV->get(j);
174 long long metric = tuner->getTime(problem);
176 metric = evaluate(problem, tuner->getTuner());
178 tuner->setTime(problem, metric);
180 if ((bestTuner == NULL && metric != -1) ||
181 (metric < bestscore && metric != -1)) {
186 if (bestTuner != NULL)
187 bestTuner->problems.push(problem);
191 void clearVector(Vector<TunerRecord *> *tunerV) {
192 for (uint j = 0; j < tunerV->getSize(); j++) {
193 TunerRecord *tuner = tunerV->get(j);
194 tuner->problems.clear();
198 void MultiTuner::tuneK() {
199 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
200 for (uint i = 0; i < rounds; i++) {
202 mapProblemsToTuners(tunerV);
203 improveTuners(tunerV);
205 model_print("Best tuners\n");
206 for (uint j = 0; j < tunerV->getSize(); j++) {
207 TunerRecord *tuner = tunerV->get(j);
209 sprintf(buffer, "tuner%u.conf", j);
210 tuner->getTuner()->serialize(buffer);
211 tuner->getTuner()->print();
216 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
217 for (uint j = 0; j < tunerV->getSize(); j++) {
218 TunerRecord *tuner = tunerV->get(j);
219 TunerRecord *newtuner = tune(tuner);
220 tunerV->set(j, newtuner);
224 double MultiTuner::evaluateAll(TunerRecord *tuner) {
226 for (uint i = 0; i < tuner->problems.getSize(); i++) {
227 Problem *problem = tuner->problems.get(i);
228 long long metric = tuner->getTime(problem);
230 metric = evaluate(problem, tuner->getTuner());
232 tuner->setTime(problem, metric);
235 double score = metric;
238 return pow(product, 1 / ((double)tuner->problems.getSize()));
241 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
242 SearchTuner *newTuner = oldTuner->copyUsed();
243 uint numSettings = oldTuner->getSize();
244 uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
245 if (settingsToMutate < 1)
246 settingsToMutate = 1;
247 model_print("Mutating %u settings\n", settingsToMutate);
248 while (settingsToMutate-- != 0) {
249 newTuner->randomMutate();
254 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
255 TunerRecord *bestTuner = NULL;
256 double bestScore = DBL_MAX;
258 TunerRecord *oldTuner = tuner;
259 double base_temperature = evaluateAll(oldTuner);
260 double oldScore = base_temperature;
262 for (uint i = 0; i < budget; i++) {
263 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
264 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
265 allTuners.push(newTuner);
266 double newScore = evaluateAll(newTuner);
267 newTuner->tuner->printUsed();
268 model_print("Received score %f\n", newScore);
269 double scoreDiff = newScore - oldScore; //smaller is better
270 if (newScore < bestScore) {
271 bestScore = newScore;
272 bestTuner = newTuner;
279 double currTemp = base_temperature * (((double)budget - i) / budget);
280 acceptanceP = exp(-scoreDiff / currTemp);
282 double ran = ((double)random()) / RAND_MAX;
283 if (ran <= acceptanceP) {