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                 model_print("Round %u of %u\n", b, budget);
 213                 uint tSize = tunerV->getSize();
 214                 for (uint i = 0; i < tSize; i++) {
 215                         SearchTuner *tmpTuner = mutateTuner(tunerV->get(i)->getTuner(), b);
 216                         TunerRecord *tmp = new TunerRecord(tmpTuner);
 217                         tmp->tunernumber = allTuners.getSize();
 218                         allTuners.push(tmp);
 219                         tunerV->push(tmp);
 220                 }
 221
 222                 Hashtable<TunerRecord *, int, uint64_t> scores;
 223                 for (uint i = 0; i < problems.getSize(); i++) {
 224                         Problem *problem = problems.get(i);
 225                         Vector<TunerRecord *> places;
 226                         for (uint j = 0; j < tunerV->getSize(); j++) {
 227                                 TunerRecord *tuner = tunerV->get(j);
 228                                 long long metric = tuner->getTime(problem);
 229                                 if (metric == -1) {
 230                                         metric = evaluate(problem, tuner);
 231                                         if (metric != -1)
 232                                                 tuner->setTime(problem, metric);
 233                                 }
 234                                 if (metric != -1) {
 235                                         uint k = 0;
 236                                         for (; k < places.getSize(); k++) {
 237                                                 if (metric < places.get(k)->getTime(problem))
 238                                                         break;
 239                                         }
 240                                         places.insertAt(k, tuner);
 241                                 }
 242                         }
 243                         int points = 9;
 244                         for (uint k = 0; k < places.getSize() && points; k++) {
 245                                 TunerRecord *tuner = places.get(k);
 246                                 points = points / 3;
 247                                 int currScore = 0;
 248                                 if (scores.contains(tuner))
 249                                         currScore = scores.get(tuner);
 250                                 currScore += points;
 251                                 scores.put(tuner, currScore);
 252                         }
 253                 }
 254                 Vector<TunerRecord *> ranking;
 255                 for (uint i = 0; i < tunerV->getSize(); i++) {
 256                         TunerRecord *tuner = tunerV->get(i);
 257                         int score = 0;
 258                         if (scores.contains(tuner))
 259                                 score = scores.get(tuner);
 260                         uint j = 0;
 261                         for (; j < ranking.getSize(); j++) {
 262                                 TunerRecord *t = ranking.get(j);
 263                                 int tscore = 0;
 264                                 if (scores.contains(t))
 265                                         tscore = scores.get(t);
 266                                 if (score < tscore)
 267                                         break;
 268                         }
 269                         ranking.insertAt(j, tuner);
 270                 }
 271                 for (uint i = tuners.getSize(); i < ranking.getSize(); i++) {
 272                         TunerRecord *tuner = ranking.get(i);
 273                         for (uint j = 0; j < tunerV->getSize(); j++) {
 274                                 if (tunerV->get(j) == tuner)
 275                                         tunerV->removeAt(j);
 276                         }
 277                 }
 278         }
 279         printData();
 280 }
 281
 282 void MultiTuner::mapProblemsToTuners(Vector<TunerRecord *> *tunerV) {
 283         for (uint i = 0; i < problems.getSize(); i++) {
 284                 Problem *problem = problems.get(i);
 285                 TunerRecord *bestTuner = NULL;
 286                 long long bestscore = 0;
 287                 for (uint j = 0; j < tunerV->getSize(); j++) {
 288                         TunerRecord *tuner = tunerV->get(j);
 289                         long long metric = tuner->getTime(problem);
 290                         if (metric == -1) {
 291                                 metric = evaluate(problem, tuner);
 292                                 if (metric != -1)
 293                                         tuner->setTime(problem, metric);
 294                         }
 295                         if ((bestTuner == NULL && metric != -1) ||
 296                                         (metric < bestscore && metric != -1)) {
 297                                 bestTuner = tuner;
 298                                 bestscore = metric;
 299                         }
 300                 }
 301                 if (bestTuner != NULL)
 302                         bestTuner->problems.push(problem);
 303         }
 304 }
 305
 306 void clearVector(Vector<TunerRecord *> *tunerV) {
 307         for (uint j = 0; j < tunerV->getSize(); j++) {
 308                 TunerRecord *tuner = tunerV->get(j);
 309                 tuner->problems.clear();
 310         }
 311 }
 312
 313 void MultiTuner::tuneK() {
 314         Vector<TunerRecord *> *tunerV = new Vector<TunerRecord *>(&tuners);
 315         for (uint i = 0; i < rounds; i++) {
 316                 clearVector(tunerV);
 317                 mapProblemsToTuners(tunerV);
 318                 improveTuners(tunerV);
 319         }
 320         model_print("Best tuners\n");
 321         for (uint j = 0; j < tunerV->getSize(); j++) {
 322                 TunerRecord *tuner = tunerV->get(j);
 323                 char buffer[256];
 324                 sprintf(buffer, "tuner%u.conf", j);
 325                 tuner->getTuner()->serialize(buffer);
 326                 tuner->getTuner()->print();
 327         }
 328         delete tunerV;
 329 }
 330
 331 void MultiTuner::improveTuners(Vector<TunerRecord *> *tunerV) {
 332         for (uint j = 0; j < tunerV->getSize(); j++) {
 333                 TunerRecord *tuner = tunerV->get(j);
 334                 TunerRecord *newtuner = tune(tuner);
 335                 tunerV->set(j, newtuner);
 336         }
 337 }
 338
 339 double MultiTuner::evaluateAll(TunerRecord *tuner) {
 340         double product = 1;
 341         for (uint i = 0; i < tuner->problems.getSize(); i++) {
 342                 Problem *problem = tuner->problems.get(i);
 343                 long long metric = tuner->getTime(problem);
 344                 if (metric == -1) {
 345                         metric = evaluate(problem, tuner);
 346                         if (metric != -1)
 347                                 tuner->setTime(problem, metric);
 348                 }
 349
 350                 double score = metric;
 351                 product *= score;
 352         }
 353         return pow(product, 1 / ((double)tuner->problems.getSize()));
 354 }
 355
 356 SearchTuner *MultiTuner::mutateTuner(SearchTuner *oldTuner, uint k) {
 357         SearchTuner *newTuner = oldTuner->copyUsed();
 358         uint numSettings = oldTuner->getSize();
 359         uint settingsToMutate = (uint)(AUTOTUNERFACTOR * (((double)numSettings) * (budget - k)) / (budget));
 360         if (settingsToMutate < 1)
 361                 settingsToMutate = 1;
 362         model_print("Mutating %u settings\n", settingsToMutate);
 363         while (settingsToMutate-- != 0) {
 364                 newTuner->randomMutate();
 365         }
 366         return newTuner;
 367 }
 368
 369 TunerRecord *MultiTuner::tune(TunerRecord *tuner) {
 370         TunerRecord *bestTuner = NULL;
 371         double bestScore = DBL_MAX;
 372
 373         TunerRecord *oldTuner = tuner;
 374         double base_temperature = evaluateAll(oldTuner);
 375         double oldScore = base_temperature;
 376
 377         for (uint i = 0; i < budget; i++) {
 378                 SearchTuner *tmpTuner = mutateTuner(oldTuner->getTuner(), i);
 379                 TunerRecord *newTuner = oldTuner->changeTuner(tmpTuner);
 380                 newTuner->tunernumber = allTuners.getSize();
 381                 allTuners.push(newTuner);
 382                 double newScore = evaluateAll(newTuner);
 383                 newTuner->tuner->printUsed();
 384                 model_print("Received score %f\n", newScore);
 385                 double scoreDiff = newScore - oldScore; //smaller is better
 386                 if (newScore < bestScore) {
 387                         bestScore = newScore;
 388                         bestTuner = newTuner;
 389                 }
 390
 391                 double acceptanceP;
 392                 if (scoreDiff < 0) {
 393                         acceptanceP = 1;
 394                 } else {
 395                         double currTemp = base_temperature * (((double)budget - i) / budget);
 396                         acceptanceP = exp(-scoreDiff / currTemp);
 397                 }
 398                 double ran = ((double)random()) / RAND_MAX;
 399                 if (ran <= acceptanceP) {
 400                         oldScore = newScore;
 401                         oldTuner = newTuner;
 402                 }
 403         }
 404
 405         return bestTuner;
 406 }
 407