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