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