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                         model_print("Mutated tuner %u to generate tuner %u\n", tunerV->get(i)->tunernumber, tmp->tunernumber);
 221                         allTuners.push(tmp);
 222                         tunerV->push(tmp);
 223                 }
 224
 225                 Hashtable<TunerRecord *, int, uint64_t> scores;
 226                 for (uint i = 0; i < problems.getSize(); i++) {
 227                         Problem *problem = problems.get(i);
 228                         Vector<TunerRecord *> places;
 229                         for (uint j = 0; j < tunerV->getSize(); j++) {
 230                                 TunerRecord *tuner = tunerV->get(j);
 231                                 long long metric = tuner->getTime(problem);
 232                                 if (metric == -1) {
 233                                         metric = evaluate(problem, tuner);
 234                                         if (tuner->getTime(problem) == -1)
 235                                                 tuner->problems.push(problem);
 236                                         if (metric != -1)
 237                                                 tuner->setTime(problem, metric);
 238                                 }
 239                                 if (metric != -1) {
 240                                         uint k = 0;
 241                                         for (; k < places.getSize(); k++) {
 242                                                 if (metric < places.get(k)->getTime(problem))
 243                                                         break;
 244                                         }
 245                                         places.insertAt(k, tuner);
 246                                 }
 247                         }
 248                         int points = 9;
 249                         for (uint k = 0; k < places.getSize() && points; k++) {
 250                                 TunerRecord *tuner = places.get(k);
 251                                 points = points / 3;
 252                                 int currScore = 0;
 253                                 if (scores.contains(tuner))
 254                                         currScore = scores.get(tuner);
 255                                 currScore += points;
 256                                 scores.put(tuner, currScore);
 257                         }
 258                 }
 259                 Vector<TunerRecord *> ranking;
 260                 for (uint i = 0; i < tunerV->getSize(); i++) {
 261                         TunerRecord *tuner = tunerV->get(i);
 262                         int score = 0;
 263                         if (scores.contains(tuner))
 264                                 score = scores.get(tuner);
 265                         uint j = 0;
 266                         for (; j < ranking.getSize(); j++) {
 267                                 TunerRecord *t = ranking.get(j);
 268                                 int tscore = 0;
 269                                 if (scores.contains(t))
 270                                         tscore = scores.get(t);
 271                                 if (score < tscore)
 272                                         break;
 273                         }
 274                         ranking.insertAt(j, tuner);
 275                 }
 276                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 277                         TunerRecord *tuner = ranking.get(i);
 278                         for (uint j = 0; j < tunerV->getSize(); j++) {
 279                                 model_print("Removing tuner %u\n", tuner->tunernumber);
 280                                 if (tunerV->get(j) == tuner)
 281                                         tunerV->removeAt(j);
 282                         }
 283                 }
 284         }
 285         printData();
 286 }
 287
 288 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 289         for (uint i = 0; i < problems.getSize(); i++) {
 290                 Problem *problem = problems.get(i);
 291                 TunerRecord *bestTuner = NULL;
 292                 long long bestscore = 0;
 293                 for (uint j = 0; j < tunerV->getSize(); j++) {
 294                         TunerRecord *tuner = tunerV->get(j);
 295                         long long metric = tuner->getTime(problem);
 296                         if (metric == -1) {
 297                                 metric = evaluate(problem, tuner);
 298                                 if (metric != -1)
 299                                         tuner->setTime(problem, metric);
 300                         }
 301                         if ((bestTuner == NULL && metric != -1) ||
 302                                         (metric < bestscore && metric != -1)) {
 303                                 bestTuner = tuner;
 304                                 bestscore = metric;
 305                         }
 306                 }
 307                 if (bestTuner != NULL)
 308                         bestTuner->problems.push(problem);
 309         }
 310 }
 311
 312 void clearVector(Vector<TunerRecord *> *tunerV) {
 313         for (uint j = 0; j < tunerV->getSize(); j++) {
 314                 TunerRecord *tuner = tunerV->get(j);
 315                 tuner->problems.clear();
 316         }
 317 }
 318
 319 void MultiTuner::tuneK() {
 320         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 321         for (uint i = 0; i < rounds; i++) {
 322                 clearVector(tunerV);
 323                 mapProblemsToTuners(tunerV);
 324                 improveTuners(tunerV);
 325         }
 326         model_print("Best tuners\n");
 327         for (uint j = 0; j < tunerV->getSize(); j++) {
 328                 TunerRecord *tuner = tunerV->get(j);
 329                 char buffer[256];
 330                 sprintf(buffer, "tuner%u.conf", j);
 331                 tuner->getTuner()->serialize(buffer);
 332                 tuner->getTuner()->print();
 333         }
 334         delete tunerV;
 335 }
 336
 337 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 338         for (uint j = 0; j < tunerV->getSize(); j++) {
 339                 TunerRecord *tuner = tunerV->get(j);
 340                 TunerRecord *newtuner = tune(tuner);
 341                 tunerV->set(j, newtuner);
 342         }
 343 }
 344
 345 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 346         double product = 1;
 347         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 348                 Problem *problem = tuner->problems.get(i);
 349                 long long metric = tuner->getTime(problem);
 350                 if (metric == -1) {
 351                         metric = evaluate(problem, tuner);
 352                         if (metric != -1)
 353                                 tuner->setTime(problem, metric);
 354                 }
 355
 356                 double score = metric;
 357                 product *= score;
 358         }
 359         return pow(product, 1 / ((double)tuner->problems.getSize()));
 360 }
 361
 362 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 363         SearchTuner *newTuner = oldTuner->copyUsed();
 364         uint numSettings = oldTuner->getSize();
 365         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 366         if (settingsToMutate < 1)
 367                 settingsToMutate = 1;
 368         model_print("Mutating %u settings\n", settingsToMutate);
 369         while (settingsToMutate-- != 0) {
 370                 newTuner->randomMutate();
 371         }
 372         return newTuner;
 373 }
 374
 375 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 376         TunerRecord *bestTuner = NULL;
 377         double bestScore = DBL_MAX;
 378
 379         TunerRecord *oldTuner = tuner;
 380         double base_temperature = evaluateAll(oldTuner);
 381         double oldScore = base_temperature;
 382
 383         for (uint i = 0; i < budget; i++) {
 384                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 385                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 386                 newTuner->tunernumber = allTuners.getSize();
 387                 allTuners.push(newTuner);
 388                 double newScore = evaluateAll(newTuner);
 389                 newTuner->tuner->printUsed();
 390                 model_print("Received score %f\n", newScore);
 391                 double scoreDiff = newScore - oldScore; //smaller is better
 392                 if (newScore < bestScore) {
 393                         bestScore = newScore;
 394                         bestTuner = newTuner;
 395                 }
 396
 397                 double acceptanceP;
 398                 if (scoreDiff < 0) {
 399                         acceptanceP = 1;
 400                 } else {
 401                         double currTemp = base_temperature * (((double)budget - i) / budget);
 402                         acceptanceP = exp(-scoreDiff / currTemp);
 403                 }
 404                 double ran = ((double)random()) / RAND_MAX;
 405                 if (ran <= acceptanceP) {
 406                         oldScore = newScore;
 407                         oldTuner = newTuner;
 408                 }
 409         }
 410
 411         return bestTuner;
 412 }
 413