src/Tuner/multituner.cc

   1 #include "multituner.h"
   2 #include "csolver.h"
   3 #include "searchtuner.h"
   4 #include <math.h>
   5 #include <stdlib.h>
   6 #include <float.h>
   7 #include <string.h>
   8 #include <iostream>
   9 #include <fstream>
  10
  11 #define UNSETVALUE -1
  12
  13 Problem::Problem(const char *_problem) : problemnumber(-1), result(UNSETVALUE) {
  14         uint len = strlen(_problem);
  15         problem = (char *) ourmalloc(len + 1);
  16         memcpy(problem, _problem, len + 1);
  17 }
  18
  19 Problem::~Problem() {
  20         ourfree(problem);
  21 }
  22
  23 void TunerRecord::setTime(Problem *problem, long long time) {
  24         timetaken.put(problem, time);
  25 }
  26
  27 long long TunerRecord::getTime(Problem *problem) {
  28         if (timetaken.contains(problem))
  29                 return timetaken.get(problem);
  30         else return -1;
  31 }
  32
  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));
  37         }
  38         return tr;
  39 }
  40
  41 MultiTuner::MultiTuner(uint _budget, uint _rounds, uint _timeout) :
  42         budget(_budget), rounds(_rounds), timeout(_timeout), execnum(0) {
  43 }
  44
  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);
  50 }
  51
  52 void MultiTuner::addProblem(const char *filename) {
  53         Problem *p = new Problem(filename);
  54         p->problemnumber = problems.getSize();
  55         problems.push(p);
  56 }
  57
  58 void MultiTuner::printData() {
  59         model_print("*********** DATA DUMP ***********\n");
  60         for (uint i = 0; i < allTuners.getSize(); i++) {
  61                 TunerRecord *tuner = allTuners.get(i);
  62                 SearchTuner *stun = tuner->getTuner();
  63                 model_print("Tuner %u\n", i);
  64                 stun->print();
  65                 model_print("----------------------------------\n\n\n");
  66                 for (uint j = 0; j < tuner->problems.getSize(); j++) {
  67                         Problem *problem = tuner->problems.get(j);
  68                         model_print("Problem %s\n", problem->getProblem());
  69                         model_print("Time = %lld\n", tuner->getTime(problem));
  70                 }
  71         }
  72 }
  73
  74 void MultiTuner::addTuner(SearchTuner *tuner) {
  75         TunerRecord *t = new TunerRecord(tuner);
  76         tuners.push(t);
  77         t->tunernumber = allTuners.getSize();
  78         allTuners.push(t);
  79 }
  80
  81
  82 void MultiTuner::readData(uint numRuns) {
  83         for (uint i = 0; i < numRuns; i++) {
  84                 ifstream myfile;
  85                 char buffer[512];
  86                 uint tunernum;
  87                 snprintf(buffer, sizeof(buffer), "tunernum%u", i);
  88                 myfile.open (buffer, ios::in);
  89                 myfile >> tunernum;
  90                 myfile.close();
  91
  92                 char problemname[512];
  93                 snprintf(buffer, sizeof(buffer), "problem%u", i);
  94                 myfile.open(buffer, ios::in);
  95                 myfile.getline(problemname, sizeof(problemname));
  96                 myfile.close();
  97
  98
  99
 100
 101         }
 102
 103 }
 104
 105 long long MultiTuner::evaluate(Problem *problem, TunerRecord *tuner) {
 106         char buffer[512];
 107         {
 108                 snprintf(buffer, sizeof(buffer), "problem%u", execnum);
 109
 110                 ofstream myfile;
 111                 myfile.open (buffer, ios::out);
 112
 113
 114                 if (myfile.is_open()) {
 115                         myfile << problem->getProblem() << endl;
 116                         myfile << problem->problemnumber << endl;
 117                         myfile.close();
 118                 }
 119         }
 120
 121         {
 122                 snprintf(buffer, sizeof(buffer), "tunernum%u", execnum);
 123
 124                 ofstream myfile;
 125                 myfile.open (buffer, ios::out);
 126
 127
 128                 if (myfile.is_open()) {
 129                         myfile << tuner->tunernumber << endl;
 130                         myfile.close();
 131                 }
 132         }
 133
 134         //Write out the tuner
 135         snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
 136         tuner->getTuner()->serialize(buffer);
 137
 138         //Do run
 139         snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%u > log%u", problem->getProblem(), timeout, execnum, execnum, execnum);
 140         int status = system(buffer);
 141
 142         long long metric = -1;
 143         int sat = IS_INDETER;
 144
 145         if (status == 0) {
 146                 //Read data in from results file
 147                 snprintf(buffer, sizeof(buffer), "result%u", execnum);
 148
 149                 ifstream myfile;
 150                 myfile.open (buffer, ios::in);
 151
 152
 153                 if (myfile.is_open()) {
 154                         myfile >> metric;
 155                         myfile >> sat;
 156                         myfile.close();
 157                 }
 158
 159                 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
 160                 tuner->getTuner()->addUsed(buffer);
 161         }
 162         //Increment execution count
 163         execnum++;
 164
 165         if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 166                 problem->result = sat;
 167         } else if (problem->result != sat && sat != IS_INDETER) {
 168                 model_print("******** Result has changed ********\n");
 169         }
 170         return metric;
 171 }
 172
 173 void MultiTuner::tuneComp() {
 174         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 175         for (uint b = 0; b < budget; b++) {
 176                 uint tSize = tunerV->getSize();
 177                 for (uint i = 0; i < tSize; i++) {
 178                         SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
 179                         TunerRecord *tmp = new TunerRecord(tmpTuner);
 180                         tmp->tunernumber = allTuners.getSize();
 181                         allTuners.push(tmp);
 182                         tunerV->push(tmp);
 183                 }
 184
 185                 Hashtable<TunerRecord *, int, uint64_t> scores;
 186                 for (uint i = 0; i < problems.getSize(); i++) {
 187                         Problem *problem = problems.get(i);
 188                         Vector<TunerRecord *> places;
 189                         for (uint j = 0; j < tunerV->getSize(); j++) {
 190                                 TunerRecord *tuner = tunerV->get(j);
 191                                 long long metric = tuner->getTime(problem);
 192                                 if (metric == -1) {
 193                                         metric = evaluate(problem, tuner);
 194                                         if (metric != -1)
 195                                                 tuner->setTime(problem, metric);
 196                                 }
 197                                 if (metric != -1) {
 198                                         uint k = 0;
 199                                         for (; k < places.getSize(); k++) {
 200                                                 if (metric < places.get(k)->getTime(problem))
 201                                                         break;
 202                                         }
 203                                         places.insertAt(k, tuner);
 204                                 }
 205                         }
 206                         int points = 9;
 207                         for (uint k = 0; k < places.getSize() && points; k++) {
 208                                 TunerRecord *tuner = places.get(k);
 209                                 points = points / 3;
 210                                 int currScore = 0;
 211                                 if (scores.contains(tuner))
 212                                         currScore = scores.get(tuner);
 213                                 currScore += points;
 214                                 scores.put(tuner, currScore);
 215                         }
 216                 }
 217                 Vector<TunerRecord *> ranking;
 218                 for (uint i = 0; i < tunerV->getSize(); i++) {
 219                         TunerRecord *tuner = tunerV->get(i);
 220                         int score = 0;
 221                         if (scores.contains(tuner))
 222                                 score = scores.get(tuner);
 223                         uint j = 0;
 224                         for (; j < ranking.getSize(); j++) {
 225                                 TunerRecord *t = ranking.get(j);
 226                                 int tscore = 0;
 227                                 if (scores.contains(t))
 228                                         tscore = scores.get(t);
 229                                 if (score < tscore)
 230                                         break;
 231                         }
 232                         ranking.insertAt(j, tuner);
 233                 }
 234                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 235                         TunerRecord *tuner = ranking.get(i);
 236                         for (uint j = 0; j < tunerV->getSize(); j++) {
 237                                 if (tunerV->get(j) == tuner)
 238                                         tunerV->removeAt(j);
 239                         }
 240                 }
 241         }
 242         printData();
 243 }
 244
 245 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 246         for (uint i = 0; i < problems.getSize(); i++) {
 247                 Problem *problem = problems.get(i);
 248                 TunerRecord *bestTuner = NULL;
 249                 long long bestscore = 0;
 250                 for (uint j = 0; j < tunerV->getSize(); j++) {
 251                         TunerRecord *tuner = tunerV->get(j);
 252                         long long metric = tuner->getTime(problem);
 253                         if (metric == -1) {
 254                                 metric = evaluate(problem, tuner);
 255                                 if (metric != -1)
 256                                         tuner->setTime(problem, metric);
 257                         }
 258                         if ((bestTuner == NULL && metric != -1) ||
 259                                         (metric < bestscore && metric != -1)) {
 260                                 bestTuner = tuner;
 261                                 bestscore = metric;
 262                         }
 263                 }
 264                 if (bestTuner != NULL)
 265                         bestTuner->problems.push(problem);
 266         }
 267 }
 268
 269 void clearVector(Vector<TunerRecord *> *tunerV) {
 270         for (uint j = 0; j < tunerV->getSize(); j++) {
 271                 TunerRecord *tuner = tunerV->get(j);
 272                 tuner->problems.clear();
 273         }
 274 }
 275
 276 void MultiTuner::tuneK() {
 277         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 278         for (uint i = 0; i < rounds; i++) {
 279                 clearVector(tunerV);
 280                 mapProblemsToTuners(tunerV);
 281                 improveTuners(tunerV);
 282         }
 283         model_print("Best tuners\n");
 284         for (uint j = 0; j < tunerV->getSize(); j++) {
 285                 TunerRecord *tuner = tunerV->get(j);
 286                 char buffer[256];
 287                 sprintf(buffer, "tuner%u.conf", j);
 288                 tuner->getTuner()->serialize(buffer);
 289                 tuner->getTuner()->print();
 290         }
 291         delete tunerV;
 292 }
 293
 294 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 295         for (uint j = 0; j < tunerV->getSize(); j++) {
 296                 TunerRecord *tuner = tunerV->get(j);
 297                 TunerRecord *newtuner = tune(tuner);
 298                 tunerV->set(j, newtuner);
 299         }
 300 }
 301
 302 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 303         double product = 1;
 304         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 305                 Problem *problem = tuner->problems.get(i);
 306                 long long metric = tuner->getTime(problem);
 307                 if (metric == -1) {
 308                         metric = evaluate(problem, tuner);
 309                         if (metric != -1)
 310                                 tuner->setTime(problem, metric);
 311                 }
 312
 313                 double score = metric;
 314                 product *= score;
 315         }
 316         return pow(product, 1 / ((double)tuner->problems.getSize()));
 317 }
 318
 319 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 320         SearchTuner *newTuner = oldTuner->copyUsed();
 321         uint numSettings = oldTuner->getSize();
 322         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 323         if (settingsToMutate < 1)
 324                 settingsToMutate = 1;
 325         model_print("Mutating %u settings\n", settingsToMutate);
 326         while (settingsToMutate-- != 0) {
 327                 newTuner->randomMutate();
 328         }
 329         return newTuner;
 330 }
 331
 332 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 333         TunerRecord *bestTuner = NULL;
 334         double bestScore = DBL_MAX;
 335
 336         TunerRecord *oldTuner = tuner;
 337         double base_temperature = evaluateAll(oldTuner);
 338         double oldScore = base_temperature;
 339
 340         for (uint i = 0; i < budget; i++) {
 341                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 342                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 343                 newTuner->tunernumber = allTuners.getSize();
 344                 allTuners.push(newTuner);
 345                 double newScore = evaluateAll(newTuner);
 346                 newTuner->tuner->printUsed();
 347                 model_print("Received score %f\n", newScore);
 348                 double scoreDiff = newScore - oldScore; //smaller is better
 349                 if (newScore < bestScore) {
 350                         bestScore = newScore;
 351                         bestTuner = newTuner;
 352                 }
 353
 354                 double acceptanceP;
 355                 if (scoreDiff < 0) {
 356                         acceptanceP = 1;
 357                 } else {
 358                         double currTemp = base_temperature * (((double)budget - i) / budget);
 359                         acceptanceP = exp(-scoreDiff / currTemp);
 360                 }
 361                 double ran = ((double)random()) / RAND_MAX;
 362                 if (ran <= acceptanceP) {
 363                         oldScore = newScore;
 364                         oldTuner = newTuner;
 365                 }
 366         }
 367
 368         return bestTuner;
 369 }
 370