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 bool MultiTuner::finishTunerExist(TunerRecord *tunerRec){
 137         SearchTuner *tuner = tunerRec->getTuner();
 138         for(uint i=0; i< explored.getSize(); i++){
 139                 if(explored.get(i)->getTuner()->equalUsed(tuner))
 140                         return true;
 141         }
 142         return false;
 143 }
 144
 145 void MultiTuner::addTuner(SearchTuner *tuner) {
 146         TunerRecord *t = new TunerRecord(tuner);
 147         tuners.push(t);
 148         t->tunernumber = allTuners.getSize();
 149         allTuners.push(t);
 150 }
 151
 152
 153 void MultiTuner::readData(uint numRuns) {
 154         for (uint i = 0; i < numRuns; i++) {
 155                 ifstream myfile;
 156                 char buffer[512];
 157                 uint tunernumber;
 158                 snprintf(buffer, sizeof(buffer), "tunernum%u", i);
 159                 myfile.open (buffer, ios::in);
 160                 myfile >> tunernumber;
 161                 myfile.close();
 162                 if (allTuners.getSize() <= tunernumber)
 163                         allTuners.setSize(tunernumber + 1);
 164                 if (allTuners.get(tunernumber) == NULL) {
 165                         snprintf(buffer, sizeof(buffer), "tuner%u", i);
 166                         allTuners.set(tunernumber, new TunerRecord(new SearchTuner(buffer), tunernumber));
 167                 }
 168                 //Add any new used records
 169                 snprintf(buffer, sizeof(buffer), "tuner%uused", i);
 170                 TunerRecord *tuner = allTuners.get(tunernumber);
 171                 tuner->getTuner()->addUsed(buffer);
 172
 173                 char problemname[512];
 174                 uint problemnumber;
 175                 snprintf(buffer, sizeof(buffer), "problem%u", i);
 176                 myfile.open(buffer, ios::in);
 177                 myfile.getline(problemname, sizeof(problemname));
 178                 myfile >> problemnumber;
 179                 myfile.close();
 180                 if (problems.getSize() <= problemnumber)
 181                         problems.setSize(problemnumber + 1);
 182                 if (problems.get(problemnumber) == NULL)
 183                         problems.set(problemnumber, new Problem(problemname));
 184                 Problem *problem = problems.get(problemnumber);
 185                 long long metric = -1;
 186                 int sat = IS_INDETER;
 187                 //Read data in from results file
 188                 snprintf(buffer, sizeof(buffer), "result%u", i);
 189
 190                 myfile.open (buffer, ios::in);
 191
 192
 193                 if (myfile.is_open()) {
 194                         myfile >> metric;
 195                         myfile >> sat;
 196                         myfile.close();
 197                 }
 198                 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 199                         problem->result = sat;
 200                 } else if (problem->result != sat && sat != IS_INDETER) {
 201                         model_print("******** Result has changed ********\n");
 202                 }
 203
 204                 if (metric != -1) {
 205                         if (tuner->getTime(problem) == -1)
 206                                 tuner->problems.push(problem);
 207                         tuner->setTime(problem, metric);
 208                 }
 209
 210         }
 211
 212 }
 213
 214 long long MultiTuner::evaluate(Problem *problem, TunerRecord *tuner) {
 215         char buffer[512];
 216         {
 217                 snprintf(buffer, sizeof(buffer), "problem%u", execnum);
 218
 219                 ofstream myfile;
 220                 myfile.open (buffer, ios::out);
 221
 222
 223                 if (myfile.is_open()) {
 224                         myfile << problem->getProblem() << endl;
 225                         myfile << problem->problemnumber << endl;
 226                         myfile.close();
 227                 }
 228         }
 229
 230         {
 231                 snprintf(buffer, sizeof(buffer), "tunernum%u", execnum);
 232
 233                 ofstream myfile;
 234                 myfile.open (buffer, ios::out);
 235
 236
 237                 if (myfile.is_open()) {
 238                         myfile << tuner->tunernumber << endl;
 239                         myfile.close();
 240                 }
 241         }
 242
 243         //Write out the tuner
 244         snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
 245         tuner->getTuner()->serialize(buffer);
 246
 247         //compute timeout
 248         uint timeinsecs = problem->besttime / NANOSEC;
 249         uint adaptive = (timeinsecs > 30) ? timeinsecs * 5 : 150;
 250         uint maxtime = (adaptive < timeout) ? adaptive : timeout;
 251
 252         //Do run
 253         snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%u > log%u", problem->getProblem(), maxtime, execnum, execnum, execnum);
 254         int status = system(buffer);
 255
 256         long long metric = -1;
 257         int sat = IS_INDETER;
 258
 259         if (status == 0) {
 260                 //Read data in from results file
 261                 snprintf(buffer, sizeof(buffer), "result%u", execnum);
 262
 263                 ifstream myfile;
 264                 myfile.open (buffer, ios::in);
 265
 266
 267                 if (myfile.is_open()) {
 268                         myfile >> metric;
 269                         myfile >> sat;
 270                         myfile.close();
 271                 }
 272                 updateTimeout(problem, metric);
 273                 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
 274                 tuner->getTuner()->addUsed(buffer);
 275                 if(!finishTunerExist(tuner)){
 276                         explored.push(tuner);
 277                 }
 278         }
 279         //Increment execution count
 280         execnum++;
 281
 282         if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 283                 problem->result = sat;
 284         } else if (problem->result != sat && sat != IS_INDETER) {
 285                 model_print("******** Result has changed ********\n");
 286         }
 287         if (sat == IS_INDETER && metric != -1) {//The case when we have a timeout
 288                 metric = -1;
 289         }
 290         return metric;
 291 }
 292
 293 void MultiTuner::updateTimeout(Problem *problem, long long metric) {
 294         if (metric < problem->besttime) {
 295                 problem->besttime = metric;
 296         }
 297 }
 298
 299 void MultiTuner::tuneComp() {
 300         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 301         for (uint b = 0; b < budget; b++) {
 302                 model_print("Round %u of %u\n", b, budget);
 303                 uint tSize = tunerV->getSize();
 304                 for (uint i = 0; i < tSize; i++) {
 305                         SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
 306                         TunerRecord *tmp = new TunerRecord(tmpTuner);
 307                         tmp->tunernumber = allTuners.getSize();
 308                         model_print("Mutated tuner %u to generate tuner %u\n", tunerV->get(i)->tunernumber, tmp->tunernumber);
 309                         allTuners.push(tmp);
 310                         tunerV->push(tmp);
 311                 }
 312
 313                 Hashtable<TunerRecord *, int, uint64_t> scores;
 314                 for (uint i = 0; i < problems.getSize(); i++) {
 315                         Problem *problem = problems.get(i);
 316                         Vector<TunerRecord *> places;
 317                         for (uint j = 0; j < tunerV->getSize(); j++) {
 318                                 TunerRecord *tuner = tunerV->get(j);
 319                                 long long metric = tuner->getTime(problem);
 320                                 if (metric == -1) {
 321                                         metric = evaluate(problem, tuner);
 322                                         if (tuner->getTime(problem) == -1) {
 323                                                 tuner->problems.push(problem);
 324                                         }
 325                                         model_print("%u.Problem<%s>\tTuner<%p, %d>\tMetric<%lld>\n", i, problem->problem,tuner, tuner->tunernumber, metric);
 326                                         model_print("*****************************\n");
 327                                         if (metric != -1)
 328                                                 tuner->setTime(problem, metric);
 329                                         else
 330                                                 tuner->setTime(problem, -2);
 331                                 }
 332                                 if (metric >= 0) {
 333                                         uint k = 0;
 334                                         for (; k < places.getSize(); k++) {
 335                                                 if (metric < places.get(k)->getTime(problem))
 336                                                         break;
 337                                         }
 338                                         model_print("place[%u]=Tuner<%p,%d>\n", k, tuner, tuner->tunernumber);
 339                                         places.insertAt(k, tuner);
 340                                 }
 341                         }
 342                         int points = 9;
 343                         for (uint k = 0; k < places.getSize() && points; k++) {
 344                                 TunerRecord *tuner = places.get(k);
 345                                 int currScore = 0;
 346                                 if (scores.contains(tuner))
 347                                         currScore = scores.get(tuner);
 348                                 currScore += points;
 349                                 model_print("Problem<%s>\tTuner<%p,%d>\tmetric<%d>\n", problem->problem, tuner, tuner->tunernumber,  currScore);
 350                                 model_print("**************************\n");
 351                                 scores.put(tuner, currScore);
 352                                 points = points / 3;
 353                         }
 354                 }
 355                 Vector<TunerRecord *> ranking;
 356                 for (uint i = 0; i < tunerV->getSize(); i++) {
 357                         TunerRecord *tuner = tunerV->get(i);
 358                         int score = 0;
 359                         if (scores.contains(tuner))
 360                                 score = scores.get(tuner);
 361                         uint j = 0;
 362                         for (; j < ranking.getSize(); j++) {
 363                                 TunerRecord *t = ranking.get(j);
 364                                 int tscore = 0;
 365                                 if (scores.contains(t))
 366                                         tscore = scores.get(t);
 367                                 if (score > tscore)
 368                                         break;
 369                         }
 370                         model_print("ranking[%u]=tuner<%p,%u>(Score=%d)\n", j, tuner, tuner->tunernumber, score);
 371                         model_print("************************\n");
 372                         ranking.insertAt(j, tuner);
 373                 }
 374                 model_print("tunerSize=%u\trankingSize=%u\ttunerVSize=%u\n", tuners.getSize(), ranking.getSize(), tunerV->getSize());
 375                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 376                         TunerRecord *tuner = ranking.get(i);
 377                         model_print("Removing tuner %u\n", tuner->tunernumber);
 378                         for (uint j = 0; j < tunerV->getSize(); j++) {
 379                                 if (tunerV->get(j) == tuner)
 380                                         tunerV->removeAt(j);
 381                         }
 382                 }
 383         }
 384         printData();
 385 }
 386
 387 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 388         for (uint i = 0; i < problems.getSize(); i++) {
 389                 Problem *problem = problems.get(i);
 390                 TunerRecord *bestTuner = NULL;
 391                 long long bestscore = 0;
 392                 for (uint j = 0; j < tunerV->getSize(); j++) {
 393                         TunerRecord *tuner = tunerV->get(j);
 394                         long long metric = tuner->getTime(problem);
 395                         if (metric == -1) {
 396                                 metric = evaluate(problem, tuner);
 397                                 if (metric != -1)
 398                                         tuner->setTime(problem, metric);
 399                                 else
 400                                         tuner->setTime(problem, -2);
 401                         }
 402                         if ((bestTuner == NULL && metric >= 0) ||
 403                                         (metric < bestscore && metric >= 0)) {
 404                                 bestTuner = tuner;
 405                                 bestscore = metric;
 406                         }
 407                 }
 408                 if (bestTuner != NULL)
 409                         bestTuner->problems.push(problem);
 410         }
 411 }
 412
 413 void clearVector(Vector<TunerRecord *> *tunerV) {
 414         for (uint j = 0; j < tunerV->getSize(); j++) {
 415                 TunerRecord *tuner = tunerV->get(j);
 416                 tuner->problems.clear();
 417         }
 418 }
 419
 420 void MultiTuner::tuneK() {
 421         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 422         for (uint i = 0; i < rounds; i++) {
 423                 clearVector(tunerV);
 424                 mapProblemsToTuners(tunerV);
 425                 improveTuners(tunerV);
 426         }
 427         model_print("Best tuners\n");
 428         for (uint j = 0; j < tunerV->getSize(); j++) {
 429                 TunerRecord *tuner = tunerV->get(j);
 430                 char buffer[256];
 431                 sprintf(buffer, "tuner%u.conf", j);
 432                 tuner->getTuner()->serialize(buffer);
 433                 tuner->getTuner()->print();
 434         }
 435         delete tunerV;
 436 }
 437
 438 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 439         for (uint j = 0; j < tunerV->getSize(); j++) {
 440                 TunerRecord *tuner = tunerV->get(j);
 441                 TunerRecord *newtuner = tune(tuner);
 442                 tunerV->set(j, newtuner);
 443         }
 444 }
 445
 446 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 447         double product = 1;
 448         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 449                 Problem *problem = tuner->problems.get(i);
 450                 long long metric = tuner->getTime(problem);
 451                 if (metric == -1) {
 452                         metric = evaluate(problem, tuner);
 453                         if (metric != -1)
 454                                 tuner->setTime(problem, metric);
 455                         else
 456                                 tuner->setTime(problem, -2);
 457                 }
 458
 459                 double score = metric;
 460                 if (metric < 0)
 461                         score = timeout;
 462                 product *= score;
 463         }
 464         return pow(product, 1 / ((double)tuner->problems.getSize()));
 465 }
 466
 467 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 468         SearchTuner *newTuner = oldTuner->copyUsed();
 469         uint numSettings = oldTuner->getSize();
 470         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 471         if (settingsToMutate < 1)
 472                 settingsToMutate = 1;
 473         model_print("Mutating %u settings\n", settingsToMutate);
 474         while (settingsToMutate-- != 0) {
 475                 newTuner->randomMutate();
 476                 if(hasExplored(newTuner)){
 477                         model_print("Note:A repetitive tuner has found\n");
 478                         settingsToMutate++;
 479                 }
 480         }
 481         return newTuner;
 482 }
 483
 484 bool MultiTuner::hasExplored(SearchTuner *newTuner){
 485         for (uint i=0; i< explored.getSize(); i++){
 486                 SearchTuner *tuner = explored.get(i)->getTuner();
 487                 if(tuner->isSubTunerof(newTuner)){
 488                         return true;
 489                 }
 490         }
 491         return false;
 492 }
 493
 494 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 495         TunerRecord *bestTuner = NULL;
 496         double bestScore = DBL_MAX;
 497
 498         TunerRecord *oldTuner = tuner;
 499         double base_temperature = evaluateAll(oldTuner);
 500         double oldScore = base_temperature;
 501
 502         for (uint i = 0; i < budget; i++) {
 503                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 504                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 505                 newTuner->tunernumber = allTuners.getSize();
 506                 allTuners.push(newTuner);
 507                 double newScore = evaluateAll(newTuner);
 508                 newTuner->tuner->printUsed();
 509                 model_print("Received score %f\n", newScore);
 510                 double scoreDiff = newScore - oldScore; //smaller is better
 511                 if (newScore < bestScore) {
 512                         bestScore = newScore;
 513                         bestTuner = newTuner;
 514                 }
 515
 516                 double acceptanceP;
 517                 if (scoreDiff < 0) {
 518                         acceptanceP = 1;
 519                 } else {
 520                         double currTemp = base_temperature * (((double)budget - i) / budget);
 521                         acceptanceP = exp(-scoreDiff / currTemp);
 522                 }
 523                 double ran = ((double)random()) / RAND_MAX;
 524                 if (ran <= acceptanceP) {
 525                         oldScore = newScore;
 526                         oldTuner = newTuner;
 527                 }
 528         }
 529
 530         return bestTuner;
 531 }
 532