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
  11 #define UNSETVALUE -1
  12
  13 Problem::Problem(const char *_problem) : problemnumber(-1), result(UNSETVALUE) {
  14         uint len = strlen(_problem);
  15         problem = (char *) ourmalloc(len + 1);
  16         memcpy(problem, _problem, len + 1);
  17 }
  18
  19 Problem::~Problem() {
  20         ourfree(problem);
  21 }
  22
  23 void TunerRecord::setTime(Problem *problem, long long time) {
  24         timetaken.put(problem, time);
  25 }
  26
  27 long long TunerRecord::getTime(Problem *problem) {
  28         if (timetaken.contains(problem))
  29                 return timetaken.get(problem);
  30         else return -1;
  31 }
  32
  33 TunerRecord *TunerRecord::changeTuner(SearchTuner *_newtuner) {
  34         TunerRecord *tr = new TunerRecord(_newtuner);
  35         for (uint i = 0; i < problems.getSize(); i++) {
  36                 tr->problems.push(problems.get(i));
  37         }
  38         return tr;
  39 }
  40
  41 MultiTuner::MultiTuner(uint _budget, uint _rounds, uint _timeout) :
  42         budget(_budget), rounds(_rounds), timeout(_timeout), execnum(0) {
  43 }
  44
  45 MultiTuner::~MultiTuner() {
  46         for (uint i = 0; i < problems.getSize(); i++)
  47                 ourfree(problems.get(i));
  48         for (uint i = 0; i < allTuners.getSize(); i++)
  49                 delete allTuners.get(i);
  50 }
  51
  52 void MultiTuner::addProblem(const char *filename) {
  53         Problem *p = new Problem(filename);
  54         p->problemnumber = problems.getSize();
  55         problems.push(p);
  56 }
  57
  58 void MultiTuner::printData() {
  59         model_print("*********** DATA DUMP ***********\n");
  60         for (uint i = 0; i < allTuners.getSize(); i++) {
  61                 TunerRecord *tuner = allTuners.get(i);
  62                 SearchTuner *stun = tuner->getTuner();
  63                 model_print("Tuner %u\n", i);
  64                 stun->print();
  65                 model_print("----------------------------------\n\n\n");
  66                 for (uint j = 0; j < tuner->problems.getSize(); j++) {
  67                         Problem *problem = tuner->problems.get(j);
  68                         model_print("Problem %s\n", problem->getProblem());
  69                         model_print("Time = %lld\n", tuner->getTime(problem));
  70                 }
  71         }
  72 }
  73
  74 void MultiTuner::addTuner(SearchTuner *tuner) {
  75         TunerRecord *t = new TunerRecord(tuner);
  76         tuners.push(t);
  77         t->tunernumber = allTuners.getSize();
  78         allTuners.push(t);
  79 }
  80
  81
  82 void MultiTuner::readData(uint numRuns) {
  83         for (uint i = 0; i < numRuns; i++) {
  84                 ifstream myfile;
  85                 char buffer[512];
  86                 uint tunernumber;
  87                 snprintf(buffer, sizeof(buffer), "tunernum%u", i);
  88                 myfile.open (buffer, ios::in);
  89                 myfile >> tunernumber;
  90                 myfile.close();
  91                 if (allTuners.getSize() <= tunernumber)
  92                         allTuners.setSize(tunernumber + 1);
  93                 if (allTuners.get(tunernumber) == NULL) {
  94                         snprintf(buffer, sizeof(buffer), "tuner%u", i);
  95                         allTuners.set(tunernumber, new TunerRecord(new SearchTuner(buffer)));
  96                 }
  97                 //Add any new used records
  98                 snprintf(buffer, sizeof(buffer), "tuner%uused", i);
  99                 TunerRecord *tuner = allTuners.get(tunernumber);
 100                 tuner->getTuner()->addUsed(buffer);
 101
 102                 char problemname[512];
 103                 uint problemnumber;
 104                 snprintf(buffer, sizeof(buffer), "problem%u", i);
 105                 myfile.open(buffer, ios::in);
 106                 myfile.getline(problemname, sizeof(problemname));
 107                 myfile >> problemnumber;
 108                 myfile.close();
 109                 if (problems.getSize() <= problemnumber)
 110                         problems.setSize(problemnumber + 1);
 111                 if (problems.get(problemnumber) == NULL)
 112                         problems.set(problemnumber, new Problem(problemname));
 113                 Problem *problem = problems.get(problemnumber);
 114                 long long metric = -1;
 115                 int sat = IS_INDETER;
 116                 //Read data in from results file
 117                 snprintf(buffer, sizeof(buffer), "result%u", execnum);
 118
 119                 myfile.open (buffer, ios::in);
 120
 121
 122                 if (myfile.is_open()) {
 123                         myfile >> metric;
 124                         myfile >> sat;
 125                         myfile.close();
 126                 }
 127                 if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 128                         problem->result = sat;
 129                 } else if (problem->result != sat && sat != IS_INDETER) {
 130                         model_print("******** Result has changed ********\n");
 131                 }
 132
 133                 if (metric != -1)
 134                         tuner->setTime(problem, metric);
 135
 136
 137         }
 138
 139 }
 140
 141 long long MultiTuner::evaluate(Problem *problem, TunerRecord *tuner) {
 142         char buffer[512];
 143         {
 144                 snprintf(buffer, sizeof(buffer), "problem%u", execnum);
 145
 146                 ofstream myfile;
 147                 myfile.open (buffer, ios::out);
 148
 149
 150                 if (myfile.is_open()) {
 151                         myfile << problem->getProblem() << endl;
 152                         myfile << problem->problemnumber << endl;
 153                         myfile.close();
 154                 }
 155         }
 156
 157         {
 158                 snprintf(buffer, sizeof(buffer), "tunernum%u", execnum);
 159
 160                 ofstream myfile;
 161                 myfile.open (buffer, ios::out);
 162
 163
 164                 if (myfile.is_open()) {
 165                         myfile << tuner->tunernumber << endl;
 166                         myfile.close();
 167                 }
 168         }
 169
 170         //Write out the tuner
 171         snprintf(buffer, sizeof(buffer), "tuner%u", execnum);
 172         tuner->getTuner()->serialize(buffer);
 173
 174         //Do run
 175         snprintf(buffer, sizeof(buffer), "./run.sh deserializerun %s %u tuner%u result%u > log%u", problem->getProblem(), timeout, execnum, execnum, execnum);
 176         int status = system(buffer);
 177
 178         long long metric = -1;
 179         int sat = IS_INDETER;
 180
 181         if (status == 0) {
 182                 //Read data in from results file
 183                 snprintf(buffer, sizeof(buffer), "result%u", execnum);
 184
 185                 ifstream myfile;
 186                 myfile.open (buffer, ios::in);
 187
 188
 189                 if (myfile.is_open()) {
 190                         myfile >> metric;
 191                         myfile >> sat;
 192                         myfile.close();
 193                 }
 194
 195                 snprintf(buffer, sizeof(buffer), "tuner%uused", execnum);
 196                 tuner->getTuner()->addUsed(buffer);
 197         }
 198         //Increment execution count
 199         execnum++;
 200
 201         if (problem->result == UNSETVALUE && sat != IS_INDETER) {
 202                 problem->result = sat;
 203         } else if (problem->result != sat && sat != IS_INDETER) {
 204                 model_print("******** Result has changed ********\n");
 205         }
 206         return metric;
 207 }
 208
 209 void MultiTuner::tuneComp() {
 210         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 211         for (uint b = 0; b < budget; b++) {
 212                 uint tSize = tunerV->getSize();
 213                 for (uint i = 0; i < tSize; i++) {
 214                         SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
 215                         TunerRecord *tmp = new TunerRecord(tmpTuner);
 216                         tmp->tunernumber = allTuners.getSize();
 217                         allTuners.push(tmp);
 218                         tunerV->push(tmp);
 219                 }
 220
 221                 Hashtable<TunerRecord *, int, uint64_t> scores;
 222                 for (uint i = 0; i < problems.getSize(); i++) {
 223                         Problem *problem = problems.get(i);
 224                         Vector<TunerRecord *> places;
 225                         for (uint j = 0; j < tunerV->getSize(); j++) {
 226                                 TunerRecord *tuner = tunerV->get(j);
 227                                 long long metric = tuner->getTime(problem);
 228                                 if (metric == -1) {
 229                                         metric = evaluate(problem, tuner);
 230                                         if (metric != -1)
 231                                                 tuner->setTime(problem, metric);
 232                                 }
 233                                 if (metric != -1) {
 234                                         uint k = 0;
 235                                         for (; k < places.getSize(); k++) {
 236                                                 if (metric < places.get(k)->getTime(problem))
 237                                                         break;
 238                                         }
 239                                         places.insertAt(k, tuner);
 240                                 }
 241                         }
 242                         int points = 9;
 243                         for (uint k = 0; k < places.getSize() && points; k++) {
 244                                 TunerRecord *tuner = places.get(k);
 245                                 points = points / 3;
 246                                 int currScore = 0;
 247                                 if (scores.contains(tuner))
 248                                         currScore = scores.get(tuner);
 249                                 currScore += points;
 250                                 scores.put(tuner, currScore);
 251                         }
 252                 }
 253                 Vector<TunerRecord *> ranking;
 254                 for (uint i = 0; i < tunerV->getSize(); i++) {
 255                         TunerRecord *tuner = tunerV->get(i);
 256                         int score = 0;
 257                         if (scores.contains(tuner))
 258                                 score = scores.get(tuner);
 259                         uint j = 0;
 260                         for (; j < ranking.getSize(); j++) {
 261                                 TunerRecord *t = ranking.get(j);
 262                                 int tscore = 0;
 263                                 if (scores.contains(t))
 264                                         tscore = scores.get(t);
 265                                 if (score < tscore)
 266                                         break;
 267                         }
 268                         ranking.insertAt(j, tuner);
 269                 }
 270                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 271                         TunerRecord *tuner = ranking.get(i);
 272                         for (uint j = 0; j < tunerV->getSize(); j++) {
 273                                 if (tunerV->get(j) == tuner)
 274                                         tunerV->removeAt(j);
 275                         }
 276                 }
 277         }
 278         printData();
 279 }
 280
 281 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 282         for (uint i = 0; i < problems.getSize(); i++) {
 283                 Problem *problem = problems.get(i);
 284                 TunerRecord *bestTuner = NULL;
 285                 long long bestscore = 0;
 286                 for (uint j = 0; j < tunerV->getSize(); j++) {
 287                         TunerRecord *tuner = tunerV->get(j);
 288                         long long metric = tuner->getTime(problem);
 289                         if (metric == -1) {
 290                                 metric = evaluate(problem, tuner);
 291                                 if (metric != -1)
 292                                         tuner->setTime(problem, metric);
 293                         }
 294                         if ((bestTuner == NULL && metric != -1) ||
 295                                         (metric < bestscore && metric != -1)) {
 296                                 bestTuner = tuner;
 297                                 bestscore = metric;
 298                         }
 299                 }
 300                 if (bestTuner != NULL)
 301                         bestTuner->problems.push(problem);
 302         }
 303 }
 304
 305 void clearVector(Vector<TunerRecord *> *tunerV) {
 306         for (uint j = 0; j < tunerV->getSize(); j++) {
 307                 TunerRecord *tuner = tunerV->get(j);
 308                 tuner->problems.clear();
 309         }
 310 }
 311
 312 void MultiTuner::tuneK() {
 313         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 314         for (uint i = 0; i < rounds; i++) {
 315                 clearVector(tunerV);
 316                 mapProblemsToTuners(tunerV);
 317                 improveTuners(tunerV);
 318         }
 319         model_print("Best tuners\n");
 320         for (uint j = 0; j < tunerV->getSize(); j++) {
 321                 TunerRecord *tuner = tunerV->get(j);
 322                 char buffer[256];
 323                 sprintf(buffer, "tuner%u.conf", j);
 324                 tuner->getTuner()->serialize(buffer);
 325                 tuner->getTuner()->print();
 326         }
 327         delete tunerV;
 328 }
 329
 330 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 331         for (uint j = 0; j < tunerV->getSize(); j++) {
 332                 TunerRecord *tuner = tunerV->get(j);
 333                 TunerRecord *newtuner = tune(tuner);
 334                 tunerV->set(j, newtuner);
 335         }
 336 }
 337
 338 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 339         double product = 1;
 340         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 341                 Problem *problem = tuner->problems.get(i);
 342                 long long metric = tuner->getTime(problem);
 343                 if (metric == -1) {
 344                         metric = evaluate(problem, tuner);
 345                         if (metric != -1)
 346                                 tuner->setTime(problem, metric);
 347                 }
 348
 349                 double score = metric;
 350                 product *= score;
 351         }
 352         return pow(product, 1 / ((double)tuner->problems.getSize()));
 353 }
 354
 355 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 356         SearchTuner *newTuner = oldTuner->copyUsed();
 357         uint numSettings = oldTuner->getSize();
 358         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 359         if (settingsToMutate < 1)
 360                 settingsToMutate = 1;
 361         model_print("Mutating %u settings\n", settingsToMutate);
 362         while (settingsToMutate-- != 0) {
 363                 newTuner->randomMutate();
 364         }
 365         return newTuner;
 366 }
 367
 368 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 369         TunerRecord *bestTuner = NULL;
 370         double bestScore = DBL_MAX;
 371
 372         TunerRecord *oldTuner = tuner;
 373         double base_temperature = evaluateAll(oldTuner);
 374         double oldScore = base_temperature;
 375
 376         for (uint i = 0; i < budget; i++) {
 377                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 378                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 379                 newTuner->tunernumber = allTuners.getSize();
 380                 allTuners.push(newTuner);
 381                 double newScore = evaluateAll(newTuner);
 382                 newTuner->tuner->printUsed();
 383                 model_print("Received score %f\n", newScore);
 384                 double scoreDiff = newScore - oldScore; //smaller is better
 385                 if (newScore < bestScore) {
 386                         bestScore = newScore;
 387                         bestTuner = newTuner;
 388                 }
 389
 390                 double acceptanceP;
 391                 if (scoreDiff < 0) {
 392                         acceptanceP = 1;
 393                 } else {
 394                         double currTemp = base_temperature * (((double)budget - i) / budget);
 395                         acceptanceP = exp(-scoreDiff / currTemp);
 396                 }
 397                 double ran = ((double)random()) / RAND_MAX;
 398                 if (ran <= acceptanceP) {
 399                         oldScore = newScore;
 400                         oldTuner = newTuner;
 401                 }
 402         }
 403
 404         return bestTuner;
 405 }
 406