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