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), "problem%u", execnum);
68 myfile.open (buffer, ios::out);
71 if (myfile.is_open()) {
72 myfile << problem->getProblem() << endl;
78 snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
79 tuner->getTuner()->serialize(buffer);
82 snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%u > log%u", problem->getProblem(), timeout, execnum, execnum, execnum);
83 int status = system(buffer);
85 long long metric = -1;
89 //Read data in from results file
90 snprintf(buffer, sizeof(buffer), "result%u", execnum);
93 myfile.open (buffer, ios::in);
96 if (myfile.is_open()) {
102 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
103 tuner->getTuner()->addUsed(buffer);
105 //Increment execution count
108 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
109 problem->result = sat;
110 } else if (problem->result != sat && sat != IS_INDETER) {
111 model_print("******** Result has changed ********\n");
116 void MultiTuner::tuneComp() {
117 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
118 for (uint b = 0; b < budget; b++) {
119 uint tSize = tunerV->getSize();
120 for (uint i = 0; i < tSize; i++) {
121 SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
122 TunerRecord *tmp = new TunerRecord(tmpTuner);
127 Hashtable<TunerRecord *, int, uint64_t> scores;
128 for (uint i = 0; i < problems.getSize(); i++) {
129 Problem *problem = problems.get(i);
130 Vector<TunerRecord *> places;
131 for (uint j = 0; j < tunerV->getSize(); j++) {
132 TunerRecord *tuner = tunerV->get(j);
133 long long metric = tuner->getTime(problem);
135 metric = evaluate(problem, tuner);
137 tuner->setTime(problem, metric);
141 for (; k < places.getSize(); k++) {
142 if (metric < places.get(k)->getTime(problem))
145 places.insertAt(k, tuner);
149 for (uint k = 0; k < places.getSize() && points; k++) {
150 TunerRecord *tuner = places.get(k);
153 if (scores.contains(tuner))
154 currScore = scores.get(tuner);
156 scores.put(tuner, currScore);
159 Vector<TunerRecord *> ranking;
160 for (uint i = 0; i < tunerV->getSize(); i++) {
161 TunerRecord *tuner = tunerV->get(i);
163 if (scores.contains(tuner))
164 score = scores.get(tuner);
166 for (; j < ranking.getSize(); j++) {
167 TunerRecord *t = ranking.get(j);
169 if (scores.contains(t))
170 tscore = scores.get(t);
174 ranking.insertAt(j, tuner);
176 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
177 TunerRecord *tuner = ranking.get(i);
178 for (uint j = 0; j < tunerV->getSize(); j++) {
179 if (tunerV->get(j) == tuner)
186 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
187 for (uint i = 0; i < problems.getSize(); i++) {
188 Problem *problem = problems.get(i);
189 TunerRecord *bestTuner = NULL;
190 long long bestscore = 0;
191 for (uint j = 0; j < tunerV->getSize(); j++) {
192 TunerRecord *tuner = tunerV->get(j);
193 long long metric = tuner->getTime(problem);
195 metric = evaluate(problem, tuner);
197 tuner->setTime(problem, metric);
199 if ((bestTuner == NULL && metric != -1) ||
200 (metric < bestscore && metric != -1)) {
205 if (bestTuner != NULL)
206 bestTuner->problems.push(problem);
210 void clearVector(Vector<TunerRecord *> *tunerV) {
211 for (uint j = 0; j < tunerV->getSize(); j++) {
212 TunerRecord *tuner = tunerV->get(j);
213 tuner->problems.clear();
217 void MultiTuner::tuneK() {
218 Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
219 for (uint i = 0; i < rounds; i++) {
221 mapProblemsToTuners(tunerV);
222 improveTuners(tunerV);
224 model_print("Best tuners\n");
225 for (uint j = 0; j < tunerV->getSize(); j++) {
226 TunerRecord *tuner = tunerV->get(j);
228 sprintf(buffer, "tuner%u.conf", j);
229 tuner->getTuner()->serialize(buffer);
230 tuner->getTuner()->print();
235 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
236 for (uint j = 0; j < tunerV->getSize(); j++) {
237 TunerRecord *tuner = tunerV->get(j);
238 TunerRecord *newtuner = tune(tuner);
239 tunerV->set(j, newtuner);
243 double MultiTuner::evaluateAll(TunerRecord *tuner) {
245 for (uint i = 0; i < tuner->problems.getSize(); i++) {
246 Problem *problem = tuner->problems.get(i);
247 long long metric = tuner->getTime(problem);
249 metric = evaluate(problem, tuner);
251 tuner->setTime(problem, metric);
254 double score = metric;
257 return pow(product, 1 / ((double)tuner->problems.getSize()));
260 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
261 SearchTuner *newTuner = oldTuner->copyUsed();
262 uint numSettings = oldTuner->getSize();
263 uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
264 if (settingsToMutate < 1)
265 settingsToMutate = 1;
266 model_print("Mutating %u settings\n", settingsToMutate);
267 while (settingsToMutate-- != 0) {
268 newTuner->randomMutate();
273 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
274 TunerRecord *bestTuner = NULL;
275 double bestScore = DBL_MAX;
277 TunerRecord *oldTuner = tuner;
278 double base_temperature = evaluateAll(oldTuner);
279 double oldScore = base_temperature;
281 for (uint i = 0; i < budget; i++) {
282 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
283 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
284 allTuners.push(newTuner);
285 double newScore = evaluateAll(newTuner);
286 newTuner->tuner->printUsed();
287 model_print("Received score %f\n", newScore);
288 double scoreDiff = newScore - oldScore; //smaller is better
289 if (newScore < bestScore) {
290 bestScore = newScore;
291 bestTuner = newTuner;
298 double currTemp = base_temperature * (((double)budget - i) / budget);
299 acceptanceP = exp(-scoreDiff / currTemp);
301 double ran = ((double)random()) / RAND_MAX;
302 if (ran <= acceptanceP) {