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 tunernumber;
  87                 snprintf(buffer, sizeof(buffer), "tunernum%u", i);
  88                 myfile.open (buffer, ios::in);
  89                 myfile >> tunernumber;
  90                 myfile.close();
  91                 if (allTuners.getSize() <= tunernumber)
  92                         allTuners.setSize(tunernumber + 1);
  93                 if (allTuners.get(tunernumber) == NULL) {
  94                         snprintf(buffer, sizeof(buffer), "tuner%u", i);
  95                         allTuners.set(tunernumber, new TunerRecord(new SearchTuner(buffer)));
  96                 }
  97                 //Add any new used records
  98                 snprintf(buffer, sizeof(buffer), "tuner%uused", i);
  99                 TunerRecord *tuner = allTuners.get(tunernumber);
 100                 tuner->getTuner()->addUsed(buffer);
 101
 102                 char problemname[512];
 103                 uint problemnumber;
 104                 snprintf(buffer, sizeof(buffer), "problem%u", i);
 105                 myfile.open(buffer, ios::in);
 106                 myfile.getline(problemname, sizeof(problemname));
 107                 myfile >> problemnumber;
 108                 myfile.close();
 109                 if (problems.getSize() <= problemnumber)
 110                         problems.setSize(problemnumber + 1);
 111                 if (problems.get(problemnumber) == NULL)
 112                         problems.set(problemnumber, new Problem(problemname));
 113                 Problem *problem = problems.get(problemnumber);
 114                 long long metric = -1;
 115                 int sat = IS_INDETER;
 116                 //Read data in from results file
 117                 snprintf(buffer, sizeof(buffer), "result%u", i);
 118
 119                 myfile.open (buffer, ios::in);
 120
 121
 122                 if (myfile.is_open()) {
 123                         myfile >> metric;
 124                         myfile >> sat;
 125                         myfile.close();
 126                 }
 127                 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 128                         problem->result = sat;
 129                 } else if (problem->result != sat && sat != IS_INDETER) {
 130                         model_print("******** Result has changed ********\n");
 131                 }
 132
 133                 if (metric != -1) {
 134                         if (tuner->getTime(problem) == -1)
 135                                 tuner->problems.push(problem);
 136                         tuner->setTime(problem, metric);
 137                 }
 138
 139         }
 140
 141 }
 142
 143 long long MultiTuner::evaluate(Problem *problem, TunerRecord *tuner) {
 144         char buffer[512];
 145         {
 146                 snprintf(buffer, sizeof(buffer), "problem%u", execnum);
 147
 148                 ofstream myfile;
 149                 myfile.open (buffer, ios::out);
 150
 151
 152                 if (myfile.is_open()) {
 153                         myfile << problem->getProblem() << endl;
 154                         myfile << problem->problemnumber << endl;
 155                         myfile.close();
 156                 }
 157         }
 158
 159         {
 160                 snprintf(buffer, sizeof(buffer), "tunernum%u", execnum);
 161
 162                 ofstream myfile;
 163                 myfile.open (buffer, ios::out);
 164
 165
 166                 if (myfile.is_open()) {
 167                         myfile << tuner->tunernumber << endl;
 168                         myfile.close();
 169                 }
 170         }
 171
 172         //Write out the tuner
 173         snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
 174         tuner->getTuner()->serialize(buffer);
 175
 176         //Do run
 177         snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%u > log%u", problem->getProblem(), timeout, execnum, execnum, execnum);
 178         int status = system(buffer);
 179
 180         long long metric = -1;
 181         int sat = IS_INDETER;
 182
 183         if (status == 0) {
 184                 //Read data in from results file
 185                 snprintf(buffer, sizeof(buffer), "result%u", execnum);
 186
 187                 ifstream myfile;
 188                 myfile.open (buffer, ios::in);
 189
 190
 191                 if (myfile.is_open()) {
 192                         myfile >> metric;
 193                         myfile >> sat;
 194                         myfile.close();
 195                 }
 196
 197                 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
 198                 tuner->getTuner()->addUsed(buffer);
 199         }
 200         //Increment execution count
 201         execnum++;
 202
 203         if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 204                 problem->result = sat;
 205         } else if (problem->result != sat && sat != IS_INDETER) {
 206                 model_print("******** Result has changed ********\n");
 207         }
 208         return metric;
 209 }
 210
 211 void MultiTuner::tuneComp() {
 212         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 213         for (uint b = 0; b < budget; b++) {
 214                 model_print("Round %u of %u\n", b, budget);
 215                 uint tSize = tunerV->getSize();
 216                 for (uint i = 0; i < tSize; i++) {
 217                         SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
 218                         TunerRecord *tmp = new TunerRecord(tmpTuner);
 219                         tmp->tunernumber = allTuners.getSize();
 220                         allTuners.push(tmp);
 221                         tunerV->push(tmp);
 222                 }
 223
 224                 Hashtable<TunerRecord *, int, uint64_t> scores;
 225                 for (uint i = 0; i < problems.getSize(); i++) {
 226                         Problem *problem = problems.get(i);
 227                         Vector<TunerRecord *> places;
 228                         for (uint j = 0; j < tunerV->getSize(); j++) {
 229                                 TunerRecord *tuner = tunerV->get(j);
 230                                 long long metric = tuner->getTime(problem);
 231                                 if (metric == -1) {
 232                                         metric = evaluate(problem, tuner);
 233                                         if (tuner->getTime(problem) == -1)
 234                                                 tuner->problems.push(problem);
 235                                         if (metric != -1)
 236                                                 tuner->setTime(problem, metric);
 237                                 }
 238                                 if (metric != -1) {
 239                                         uint k = 0;
 240                                         for (; k < places.getSize(); k++) {
 241                                                 if (metric < places.get(k)->getTime(problem))
 242                                                         break;
 243                                         }
 244                                         places.insertAt(k, tuner);
 245                                 }
 246                         }
 247                         int points = 9;
 248                         for (uint k = 0; k < places.getSize() && points; k++) {
 249                                 TunerRecord *tuner = places.get(k);
 250                                 points = points / 3;
 251                                 int currScore = 0;
 252                                 if (scores.contains(tuner))
 253                                         currScore = scores.get(tuner);
 254                                 currScore += points;
 255                                 scores.put(tuner, currScore);
 256                         }
 257                 }
 258                 Vector<TunerRecord *> ranking;
 259                 for (uint i = 0; i < tunerV->getSize(); i++) {
 260                         TunerRecord *tuner = tunerV->get(i);
 261                         int score = 0;
 262                         if (scores.contains(tuner))
 263                                 score = scores.get(tuner);
 264                         uint j = 0;
 265                         for (; j < ranking.getSize(); j++) {
 266                                 TunerRecord *t = ranking.get(j);
 267                                 int tscore = 0;
 268                                 if (scores.contains(t))
 269                                         tscore = scores.get(t);
 270                                 if (score < tscore)
 271                                         break;
 272                         }
 273                         ranking.insertAt(j, tuner);
 274                 }
 275                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 276                         TunerRecord *tuner = ranking.get(i);
 277                         for (uint j = 0; j < tunerV->getSize(); j++) {
 278                                 if (tunerV->get(j) == tuner)
 279                                         tunerV->removeAt(j);
 280                         }
 281                 }
 282         }
 283         printData();
 284 }
 285
 286 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 287         for (uint i = 0; i < problems.getSize(); i++) {
 288                 Problem *problem = problems.get(i);
 289                 TunerRecord *bestTuner = NULL;
 290                 long long bestscore = 0;
 291                 for (uint j = 0; j < tunerV->getSize(); j++) {
 292                         TunerRecord *tuner = tunerV->get(j);
 293                         long long metric = tuner->getTime(problem);
 294                         if (metric == -1) {
 295                                 metric = evaluate(problem, tuner);
 296                                 if (metric != -1)
 297                                         tuner->setTime(problem, metric);
 298                         }
 299                         if ((bestTuner == NULL && metric != -1) ||
 300                                         (metric < bestscore && metric != -1)) {
 301                                 bestTuner = tuner;
 302                                 bestscore = metric;
 303                         }
 304                 }
 305                 if (bestTuner != NULL)
 306                         bestTuner->problems.push(problem);
 307         }
 308 }
 309
 310 void clearVector(Vector<TunerRecord *> *tunerV) {
 311         for (uint j = 0; j < tunerV->getSize(); j++) {
 312                 TunerRecord *tuner = tunerV->get(j);
 313                 tuner->problems.clear();
 314         }
 315 }
 316
 317 void MultiTuner::tuneK() {
 318         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 319         for (uint i = 0; i < rounds; i++) {
 320                 clearVector(tunerV);
 321                 mapProblemsToTuners(tunerV);
 322                 improveTuners(tunerV);
 323         }
 324         model_print("Best tuners\n");
 325         for (uint j = 0; j < tunerV->getSize(); j++) {
 326                 TunerRecord *tuner = tunerV->get(j);
 327                 char buffer[256];
 328                 sprintf(buffer, "tuner%u.conf", j);
 329                 tuner->getTuner()->serialize(buffer);
 330                 tuner->getTuner()->print();
 331         }
 332         delete tunerV;
 333 }
 334
 335 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 336         for (uint j = 0; j < tunerV->getSize(); j++) {
 337                 TunerRecord *tuner = tunerV->get(j);
 338                 TunerRecord *newtuner = tune(tuner);
 339                 tunerV->set(j, newtuner);
 340         }
 341 }
 342
 343 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 344         double product = 1;
 345         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 346                 Problem *problem = tuner->problems.get(i);
 347                 long long metric = tuner->getTime(problem);
 348                 if (metric == -1) {
 349                         metric = evaluate(problem, tuner);
 350                         if (metric != -1)
 351                                 tuner->setTime(problem, metric);
 352                 }
 353
 354                 double score = metric;
 355                 product *= score;
 356         }
 357         return pow(product, 1 / ((double)tuner->problems.getSize()));
 358 }
 359
 360 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 361         SearchTuner *newTuner = oldTuner->copyUsed();
 362         uint numSettings = oldTuner->getSize();
 363         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 364         if (settingsToMutate < 1)
 365                 settingsToMutate = 1;
 366         model_print("Mutating %u settings\n", settingsToMutate);
 367         while (settingsToMutate-- != 0) {
 368                 newTuner->randomMutate();
 369         }
 370         return newTuner;
 371 }
 372
 373 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 374         TunerRecord *bestTuner = NULL;
 375         double bestScore = DBL_MAX;
 376
 377         TunerRecord *oldTuner = tuner;
 378         double base_temperature = evaluateAll(oldTuner);
 379         double oldScore = base_temperature;
 380
 381         for (uint i = 0; i < budget; i++) {
 382                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 383                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 384                 newTuner->tunernumber = allTuners.getSize();
 385                 allTuners.push(newTuner);
 386                 double newScore = evaluateAll(newTuner);
 387                 newTuner->tuner->printUsed();
 388                 model_print("Received score %f\n", newScore);
 389                 double scoreDiff = newScore - oldScore; //smaller is better
 390                 if (newScore < bestScore) {
 391                         bestScore = newScore;
 392                         bestTuner = newTuner;
 393                 }
 394
 395                 double acceptanceP;
 396                 if (scoreDiff < 0) {
 397                         acceptanceP = 1;
 398                 } else {
 399                         double currTemp = base_temperature * (((double)budget - i) / budget);
 400                         acceptanceP = exp(-scoreDiff / currTemp);
 401                 }
 402                 double ran = ((double)random()) / RAND_MAX;
 403                 if (ran <= acceptanceP) {
 404                         oldScore = newScore;
 405                         oldTuner = newTuner;
 406                 }
 407         }
 408
 409         return bestTuner;
 410 }
 411