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 #include <limits>
  11
  12 #define UNSETVALUE -1
  13
  14 Problem::Problem(const char *_problem) :
  15         problemnumber(-1),
  16         result(UNSETVALUE),
  17         besttime(LLONG_MAX)
  18 {
  19         uint len = strlen(_problem);
  20         problem = (char *) ourmalloc(len + 1);
  21         memcpy(problem, _problem, len + 1);
  22 }
  23
  24 Problem::~Problem() {
  25         ourfree(problem);
  26 }
  27
  28 void TunerRecord::setTime(Problem *problem, long long time) {
  29         timetaken.put(problem, time);
  30 }
  31
  32 void TunerRecord::print(){
  33         model_print("*************TUNER NUMBER=%d***********\n", tunernumber);
  34         tuner->print();
  35         model_print("&&&&&&&&&&&&&USED SETTINGS &&&&&&&&&&&&\n");
  36         tuner->printUsed();
  37         model_print("\n");
  38 }
  39
  40 long long TunerRecord::getTime(Problem *problem) {
  41         if (timetaken.contains(problem))
  42                 return timetaken.get(problem);
  43         else return -1;
  44 }
  45
  46 TunerRecord *TunerRecord::changeTuner(SearchTuner *_newtuner) {
  47         TunerRecord *tr = new TunerRecord(_newtuner);
  48         for (uint i = 0; i < problems.getSize(); i++) {
  49                 tr->problems.push(problems.get(i));
  50         }
  51         return tr;
  52 }
  53
  54 MultiTuner::MultiTuner(uint _budget, uint _rounds, uint _timeout) :
  55         budget(_budget), rounds(_rounds), timeout(_timeout), execnum(0) {
  56 }
  57
  58 MultiTuner::~MultiTuner() {
  59         for (uint i = 0; i < problems.getSize(); i++)
  60                 ourfree(problems.get(i));
  61         for (uint i = 0; i < allTuners.getSize(); i++)
  62                 delete allTuners.get(i);
  63 }
  64
  65 void MultiTuner::addProblem(const char *filename) {
  66         Problem *p = new Problem(filename);
  67         p->problemnumber = problems.getSize();
  68         problems.push(p);
  69 }
  70
  71 void MultiTuner::printData() {
  72         model_print("*********** DATA DUMP ***********\n");
  73         for (uint i = 0; i < allTuners.getSize(); i++) {
  74                 TunerRecord *tuner = allTuners.get(i);
  75                 SearchTuner *stun = tuner->getTuner();
  76                 model_print("Tuner %u\n", i);
  77                 stun->print();
  78                 model_print("----------------------------------\n\n\n");
  79                 for (uint j = 0; j < tuner->problems.getSize(); j++) {
  80                         Problem *problem = tuner->problems.get(j);
  81                         model_print("Problem %s\n", problem->getProblem());
  82                         model_print("Time = %lld\n", tuner->getTime(problem));
  83                 }
  84         }
  85 }
  86
  87 void MultiTuner::findBestThreeTuners() {
  88         if (allTuners.getSize() < 3) {
  89                 printData();
  90                 return;
  91         }
  92         TunerRecord *bestTuners[3];
  93         double score = DBL_MAX;
  94         for (uint i = 0; i < allTuners.getSize() - 2; i++) {
  95                 for (uint j = i + 1; j < allTuners.getSize() - 1; j++) {
  96                         for (uint k = j + 1; k < allTuners.getSize(); k++) {
  97                                 TunerRecord *tuner1 = allTuners.get(i);
  98                                 TunerRecord *tuner2 = allTuners.get(j);
  99                                 TunerRecord *tuner3 = allTuners.get(k);
 100                                 double mintimes[problems.getSize()];
 101                                 for (uint l = 0; l < problems.getSize(); l++) {
 102                                         Problem *problem = problems.get(l);
 103                                         mintimes[l] = pow(min(tuner1->getTime(problem), tuner2->getTime(problem), tuner3->getTime(problem)), (double)1 / problems.getSize());
 104                                 }
 105                                 double result = 1;
 106                                 for (uint l = 0; l < problems.getSize(); l++) {
 107                                         result *= mintimes[l];
 108                                 }
 109                                 if (result < score) {
 110                                         score = result;
 111                                         bestTuners[0] = tuner1;
 112                                         bestTuners[1] = tuner2;
 113                                         bestTuners[2] = tuner3;
 114                                 }
 115                         }
 116                 }
 117         }
 118         model_print("Best 3 tuners:\n");
 119         for (uint i = 0; i < 3; i++) {
 120                 TunerRecord *tuner = bestTuners[i];
 121                 SearchTuner *stun = tuner->getTuner();
 122                 char buffer[512];
 123                 snprintf(buffer, sizeof(buffer), "best%u.tuner", i);
 124                 stun->serialize(buffer);
 125                 model_print("Tuner %u\n", tuner->tunernumber);
 126                 stun->print();
 127                 for (uint j = 0; j < tuner->problems.getSize(); j++) {
 128                         Problem *problem = tuner->problems.get(j);
 129                         model_print("Problem %s\n", problem->getProblem());
 130                         model_print("Time = %lld\n", tuner->getTime(problem));
 131                 }
 132                 model_print("----------------------------------\n\n\n");
 133         }
 134 }
 135
 136 void MultiTuner::addTuner(SearchTuner *tuner) {
 137         TunerRecord *t = new TunerRecord(tuner);
 138         tuners.push(t);
 139         t->tunernumber = allTuners.getSize();
 140         allTuners.push(t);
 141 }
 142
 143
 144 void MultiTuner::readData(uint numRuns) {
 145         for (uint i = 0; i < numRuns; i++) {
 146                 ifstream myfile;
 147                 char buffer[512];
 148                 uint tunernumber;
 149                 snprintf(buffer, sizeof(buffer), "tunernum%u", i);
 150                 myfile.open (buffer, ios::in);
 151                 myfile >> tunernumber;
 152                 myfile.close();
 153                 if (allTuners.getSize() <= tunernumber)
 154                         allTuners.setSize(tunernumber + 1);
 155                 if (allTuners.get(tunernumber) == NULL) {
 156                         snprintf(buffer, sizeof(buffer), "tuner%u", i);
 157                         allTuners.set(tunernumber, new TunerRecord(new SearchTuner(buffer), tunernumber));
 158                 }
 159                 //Add any new used records
 160                 snprintf(buffer, sizeof(buffer), "tuner%uused", i);
 161                 TunerRecord *tuner = allTuners.get(tunernumber);
 162                 tuner->getTuner()->addUsed(buffer);
 163
 164                 char problemname[512];
 165                 uint problemnumber;
 166                 snprintf(buffer, sizeof(buffer), "problem%u", i);
 167                 myfile.open(buffer, ios::in);
 168                 myfile.getline(problemname, sizeof(problemname));
 169                 myfile >> problemnumber;
 170                 myfile.close();
 171                 if (problems.getSize() <= problemnumber)
 172                         problems.setSize(problemnumber + 1);
 173                 if (problems.get(problemnumber) == NULL)
 174                         problems.set(problemnumber, new Problem(problemname));
 175                 Problem *problem = problems.get(problemnumber);
 176                 long long metric = -1;
 177                 int sat = IS_INDETER;
 178                 //Read data in from results file
 179                 snprintf(buffer, sizeof(buffer), "result%u", i);
 180
 181                 myfile.open (buffer, ios::in);
 182
 183
 184                 if (myfile.is_open()) {
 185                         myfile >> metric;
 186                         myfile >> sat;
 187                         myfile.close();
 188                 }
 189                 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 190                         problem->result = sat;
 191                 } else if (problem->result != sat && sat != IS_INDETER) {
 192                         model_print("******** Result has changed ********\n");
 193                 }
 194
 195                 if (metric != -1) {
 196                         if (tuner->getTime(problem) == -1)
 197                                 tuner->problems.push(problem);
 198                         tuner->setTime(problem, metric);
 199                 }
 200
 201         }
 202
 203 }
 204
 205 long long MultiTuner::evaluate(Problem *problem, TunerRecord *tuner) {
 206         char buffer[512];
 207         {
 208                 snprintf(buffer, sizeof(buffer), "problem%u", execnum);
 209
 210                 ofstream myfile;
 211                 myfile.open (buffer, ios::out);
 212
 213
 214                 if (myfile.is_open()) {
 215                         myfile << problem->getProblem() << endl;
 216                         myfile << problem->problemnumber << endl;
 217                         myfile.close();
 218                 }
 219         }
 220
 221         {
 222                 snprintf(buffer, sizeof(buffer), "tunernum%u", execnum);
 223
 224                 ofstream myfile;
 225                 myfile.open (buffer, ios::out);
 226
 227
 228                 if (myfile.is_open()) {
 229                         myfile << tuner->tunernumber << endl;
 230                         myfile.close();
 231                 }
 232         }
 233
 234         //Write out the tuner
 235         snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
 236         tuner->getTuner()->serialize(buffer);
 237
 238         //compute timeout
 239         uint timeinsecs = problem->besttime / NANOSEC;
 240         uint adaptive = (timeinsecs > 30) ? timeinsecs * 5 : 150;
 241         uint maxtime = (adaptive < timeout) ? adaptive : timeout;
 242
 243         //Do run
 244         snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%u > log%u", problem->getProblem(), maxtime, execnum, execnum, execnum);
 245         int status = system(buffer);
 246
 247         long long metric = -1;
 248         int sat = IS_INDETER;
 249
 250         if (status == 0) {
 251                 //Read data in from results file
 252                 snprintf(buffer, sizeof(buffer), "result%u", execnum);
 253
 254                 ifstream myfile;
 255                 myfile.open (buffer, ios::in);
 256
 257
 258                 if (myfile.is_open()) {
 259                         myfile >> metric;
 260                         myfile >> sat;
 261                         myfile.close();
 262                 }
 263                 updateTimeout(problem, metric);
 264                 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
 265                 tuner->getTuner()->addUsed(buffer);
 266                 explored.push(tuner);
 267         }
 268         //Increment execution count
 269         execnum++;
 270
 271         if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 272                 problem->result = sat;
 273         } else if (problem->result != sat && sat != IS_INDETER) {
 274                 model_print("******** Result has changed ********\n");
 275         }
 276         if (sat == IS_INDETER && metric != -1) {//The case when we have a timeout
 277                 metric = -1;
 278         }
 279         return metric;
 280 }
 281
 282 void MultiTuner::updateTimeout(Problem *problem, long long metric) {
 283         if (metric < problem->besttime) {
 284                 problem->besttime = metric;
 285         }
 286 }
 287
 288 void MultiTuner::tuneComp() {
 289         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 290         for (uint b = 0; b < budget; b++) {
 291                 model_print("Round %u of %u\n", b, budget);
 292                 uint tSize = tunerV->getSize();
 293                 for (uint i = 0; i < tSize; i++) {
 294                         SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
 295                         TunerRecord *tmp = new TunerRecord(tmpTuner);
 296                         tmp->tunernumber = allTuners.getSize();
 297                         model_print("Mutated tuner %u to generate tuner %u\n", tunerV->get(i)->tunernumber, tmp->tunernumber);
 298                         allTuners.push(tmp);
 299                         tunerV->push(tmp);
 300                 }
 301
 302                 Hashtable<TunerRecord *, int, uint64_t> scores;
 303                 for (uint i = 0; i < problems.getSize(); i++) {
 304                         Problem *problem = problems.get(i);
 305                         Vector<TunerRecord *> places;
 306                         for (uint j = 0; j < tunerV->getSize(); j++) {
 307                                 TunerRecord *tuner = tunerV->get(j);
 308                                 long long metric = tuner->getTime(problem);
 309                                 if (metric == -1) {
 310                                         metric = evaluate(problem, tuner);
 311                                         if (tuner->getTime(problem) == -1) {
 312                                                 tuner->problems.push(problem);
 313                                         }
 314                                         model_print("%u.Problem<%s>\tTuner<%p, %d>\tMetric<%lld>\n", i, problem->problem,tuner, tuner->tunernumber, metric);
 315                                         model_print("*****************************\n");
 316                                         if (metric != -1)
 317                                                 tuner->setTime(problem, metric);
 318                                         else
 319                                                 tuner->setTime(problem, -2);
 320                                 }
 321                                 if (metric >= 0) {
 322                                         uint k = 0;
 323                                         for (; k < places.getSize(); k++) {
 324                                                 if (metric < places.get(k)->getTime(problem))
 325                                                         break;
 326                                         }
 327                                         model_print("place[%u]=Tuner<%p,%d>\n", k, tuner, tuner->tunernumber);
 328                                         places.insertAt(k, tuner);
 329                                 }
 330                         }
 331                         int points = 9;
 332                         for (uint k = 0; k < places.getSize() && points; k++) {
 333                                 TunerRecord *tuner = places.get(k);
 334                                 int currScore = 0;
 335                                 if (scores.contains(tuner))
 336                                         currScore = scores.get(tuner);
 337                                 currScore += points;
 338                                 model_print("Problem<%s>\tTuner<%p,%d>\tmetric<%d>\n", problem->problem, tuner, tuner->tunernumber,  currScore);
 339                                 model_print("**************************\n");
 340                                 scores.put(tuner, currScore);
 341                                 points = points / 3;
 342                         }
 343                 }
 344                 Vector<TunerRecord *> ranking;
 345                 for (uint i = 0; i < tunerV->getSize(); i++) {
 346                         TunerRecord *tuner = tunerV->get(i);
 347                         int score = 0;
 348                         if (scores.contains(tuner))
 349                                 score = scores.get(tuner);
 350                         uint j = 0;
 351                         for (; j < ranking.getSize(); j++) {
 352                                 TunerRecord *t = ranking.get(j);
 353                                 int tscore = 0;
 354                                 if (scores.contains(t))
 355                                         tscore = scores.get(t);
 356                                 if (score > tscore)
 357                                         break;
 358                         }
 359                         model_print("ranking[%u]=tuner<%p,%u>(Score=%d)\n", j, tuner, tuner->tunernumber, score);
 360                         model_print("************************\n");
 361                         ranking.insertAt(j, tuner);
 362                 }
 363                 model_print("tunerSize=%u\trankingSize=%u\ttunerVSize=%u\n", tuners.getSize(), ranking.getSize(), tunerV->getSize());
 364                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 365                         TunerRecord *tuner = ranking.get(i);
 366                         model_print("Removing tuner %u\n", tuner->tunernumber);
 367                         for (uint j = 0; j < tunerV->getSize(); j++) {
 368                                 if (tunerV->get(j) == tuner)
 369                                         tunerV->removeAt(j);
 370                         }
 371                 }
 372         }
 373         printData();
 374 }
 375
 376 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 377         for (uint i = 0; i < problems.getSize(); i++) {
 378                 Problem *problem = problems.get(i);
 379                 TunerRecord *bestTuner = NULL;
 380                 long long bestscore = 0;
 381                 for (uint j = 0; j < tunerV->getSize(); j++) {
 382                         TunerRecord *tuner = tunerV->get(j);
 383                         long long metric = tuner->getTime(problem);
 384                         if (metric == -1) {
 385                                 metric = evaluate(problem, tuner);
 386                                 if (metric != -1)
 387                                         tuner->setTime(problem, metric);
 388                                 else
 389                                         tuner->setTime(problem, -2);
 390                         }
 391                         if ((bestTuner == NULL && metric >= 0) ||
 392                                         (metric < bestscore && metric >= 0)) {
 393                                 bestTuner = tuner;
 394                                 bestscore = metric;
 395                         }
 396                 }
 397                 if (bestTuner != NULL)
 398                         bestTuner->problems.push(problem);
 399         }
 400 }
 401
 402 void clearVector(Vector<TunerRecord *> *tunerV) {
 403         for (uint j = 0; j < tunerV->getSize(); j++) {
 404                 TunerRecord *tuner = tunerV->get(j);
 405                 tuner->problems.clear();
 406         }
 407 }
 408
 409 void MultiTuner::tuneK() {
 410         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 411         for (uint i = 0; i < rounds; i++) {
 412                 clearVector(tunerV);
 413                 mapProblemsToTuners(tunerV);
 414                 improveTuners(tunerV);
 415         }
 416         model_print("Best tuners\n");
 417         for (uint j = 0; j < tunerV->getSize(); j++) {
 418                 TunerRecord *tuner = tunerV->get(j);
 419                 char buffer[256];
 420                 sprintf(buffer, "tuner%u.conf", j);
 421                 tuner->getTuner()->serialize(buffer);
 422                 tuner->getTuner()->print();
 423         }
 424         delete tunerV;
 425 }
 426
 427 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 428         for (uint j = 0; j < tunerV->getSize(); j++) {
 429                 TunerRecord *tuner = tunerV->get(j);
 430                 TunerRecord *newtuner = tune(tuner);
 431                 tunerV->set(j, newtuner);
 432         }
 433 }
 434
 435 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 436         double product = 1;
 437         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 438                 Problem *problem = tuner->problems.get(i);
 439                 long long metric = tuner->getTime(problem);
 440                 if (metric == -1) {
 441                         metric = evaluate(problem, tuner);
 442                         if (metric != -1)
 443                                 tuner->setTime(problem, metric);
 444                         else
 445                                 tuner->setTime(problem, -2);
 446                 }
 447
 448                 double score = metric;
 449                 if (metric < 0)
 450                         score = timeout;
 451                 product *= score;
 452         }
 453         return pow(product, 1 / ((double)tuner->problems.getSize()));
 454 }
 455
 456 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 457         SearchTuner *newTuner = oldTuner->copyUsed();
 458         uint numSettings = oldTuner->getSize();
 459         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 460         if (settingsToMutate < 1)
 461                 settingsToMutate = 1;
 462         model_print("Mutating %u settings\n", settingsToMutate);
 463         while (settingsToMutate-- != 0) {
 464                 newTuner->randomMutate();
 465                 if(hasExplored(newTuner)){
 466                         model_print("Note:A repetitive tuner has found\n");
 467                         settingsToMutate++;
 468                 }
 469         }
 470         return newTuner;
 471 }
 472
 473 bool MultiTuner::hasExplored(SearchTuner *newTuner){
 474         for (uint i=0; i< explored.getSize(); i++){
 475                 SearchTuner *tuner = explored.get(i)->getTuner();
 476                 if(tuner->isSubTunerof(newTuner)){
 477                         return true;
 478                 }
 479         }
 480         return false;
 481 }
 482
 483 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 484         TunerRecord *bestTuner = NULL;
 485         double bestScore = DBL_MAX;
 486
 487         TunerRecord *oldTuner = tuner;
 488         double base_temperature = evaluateAll(oldTuner);
 489         double oldScore = base_temperature;
 490
 491         for (uint i = 0; i < budget; i++) {
 492                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 493                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 494                 newTuner->tunernumber = allTuners.getSize();
 495                 allTuners.push(newTuner);
 496                 double newScore = evaluateAll(newTuner);
 497                 newTuner->tuner->printUsed();
 498                 model_print("Received score %f\n", newScore);
 499                 double scoreDiff = newScore - oldScore; //smaller is better
 500                 if (newScore < bestScore) {
 501                         bestScore = newScore;
 502                         bestTuner = newTuner;
 503                 }
 504
 505                 double acceptanceP;
 506                 if (scoreDiff < 0) {
 507                         acceptanceP = 1;
 508                 } else {
 509                         double currTemp = base_temperature * (((double)budget - i) / budget);
 510                         acceptanceP = exp(-scoreDiff / currTemp);
 511                 }
 512                 double ran = ((double)random()) / RAND_MAX;
 513                 if (ran <= acceptanceP) {
 514                         oldScore = newScore;
 515                         oldTuner = newTuner;
 516                 }
 517         }
 518
 519         return bestTuner;
 520 }
 521