| 1 | /* This file is part of the Linux Trace Toolkit viewer |
| 2 | * Copyright (C) 2009, 2010 Benjamin Poirier <benjamin.poirier@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software: you can redistribute it and/or modify it |
| 5 | * under the terms of the GNU Lesser General Public License as published by |
| 6 | * the Free Software Foundation, either version 2.1 of the License, or (at |
| 7 | * your option) any later version. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
| 12 | * License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU Lesser General Public License |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | */ |
| 17 | |
| 18 | #define _GNU_SOURCE |
| 19 | #define _ISOC99_SOURCE |
| 20 | |
| 21 | #ifdef HAVE_CONFIG_H |
| 22 | #include <config.h> |
| 23 | #endif |
| 24 | |
| 25 | #include <arpa/inet.h> |
| 26 | #include <errno.h> |
| 27 | #include <math.h> |
| 28 | #include <netinet/in.h> |
| 29 | #include <stddef.h> |
| 30 | #include <stdlib.h> |
| 31 | #include <stdio.h> |
| 32 | #include <string.h> |
| 33 | #include <sys/socket.h> |
| 34 | #include <unistd.h> |
| 35 | |
| 36 | #include "lookup3.h" |
| 37 | #include "sync_chain.h" |
| 38 | #include "event_analysis_chull.h" |
| 39 | |
| 40 | #include "event_analysis_eval.h" |
| 41 | |
| 42 | |
| 43 | struct WriteHistogramInfo |
| 44 | { |
| 45 | GHashTable* rttInfo; |
| 46 | FILE* graphsStream; |
| 47 | }; |
| 48 | |
| 49 | #ifdef HAVE_LIBGLPK |
| 50 | struct LPAddRowInfo |
| 51 | { |
| 52 | glp_prob* lp; |
| 53 | int boundType; |
| 54 | GArray* iArray, * jArray, * aArray; |
| 55 | }; |
| 56 | #endif |
| 57 | |
| 58 | // Functions common to all analysis modules |
| 59 | static void initAnalysisEval(SyncState* const syncState); |
| 60 | static void destroyAnalysisEval(SyncState* const syncState); |
| 61 | |
| 62 | static void analyzeMessageEval(SyncState* const syncState, Message* const |
| 63 | message); |
| 64 | static void analyzeExchangeEval(SyncState* const syncState, Exchange* const |
| 65 | exchange); |
| 66 | static void analyzeBroadcastEval(SyncState* const syncState, Broadcast* const |
| 67 | broadcast); |
| 68 | static AllFactors* finalizeAnalysisEval(SyncState* const syncState); |
| 69 | static void printAnalysisStatsEval(SyncState* const syncState); |
| 70 | static void writeAnalysisTraceTimeBackPlotsEval(SyncState* const syncState, |
| 71 | const unsigned int i, const unsigned int j); |
| 72 | static void writeAnalysisTraceTimeForePlotsEval(SyncState* const syncState, |
| 73 | const unsigned int i, const unsigned int j); |
| 74 | static void writeAnalysisTraceTraceBackPlotsEval(SyncState* const syncState, |
| 75 | const unsigned int i, const unsigned int j); |
| 76 | static void writeAnalysisTraceTraceForePlotsEval(SyncState* const syncState, |
| 77 | const unsigned int i, const unsigned int j); |
| 78 | |
| 79 | // Functions specific to this module |
| 80 | static guint ghfRttKeyHash(gconstpointer key); |
| 81 | static gboolean gefRttKeyEqual(gconstpointer a, gconstpointer b); |
| 82 | static void gdnDestroyRttKey(gpointer data); |
| 83 | static void gdnDestroyDouble(gpointer data); |
| 84 | static void readRttInfo(GHashTable* rttInfo, FILE* rttFile); |
| 85 | static void positionStream(FILE* stream); |
| 86 | |
| 87 | static void gfSum(gpointer data, gpointer userData); |
| 88 | static void gfSumSquares(gpointer data, gpointer userData); |
| 89 | static void ghfPrintExchangeRtt(gpointer key, gpointer value, gpointer |
| 90 | user_data); |
| 91 | |
| 92 | static void hitBin(struct Bins* const bins, const double value); |
| 93 | static unsigned int binNum(const double value) __attribute__((pure)); |
| 94 | static double binStart(const unsigned int binNum) __attribute__((pure)); |
| 95 | static double binEnd(const unsigned int binNum) __attribute__((pure)); |
| 96 | static uint32_t normalTotal(struct Bins* const bins) __attribute__((const)); |
| 97 | |
| 98 | static AnalysisHistogramEval* constructAnalysisHistogramEval(const char* const |
| 99 | graphsDir, const struct RttKey* const rttKey); |
| 100 | static void destroyAnalysisHistogramEval(AnalysisHistogramEval* const |
| 101 | histogram); |
| 102 | static void gdnDestroyAnalysisHistogramEval(gpointer data); |
| 103 | static void ghfWriteHistogram(gpointer key, gpointer value, gpointer |
| 104 | user_data); |
| 105 | static void dumpBinToFile(const struct Bins* const bins, FILE* const file); |
| 106 | static void writeHistogram(FILE* graphsStream, const struct RttKey* rttKey, |
| 107 | double* minRtt, AnalysisHistogramEval* const histogram); |
| 108 | |
| 109 | static void updateBounds(Bounds** const bounds, Event* const e1, Event* const |
| 110 | e2); |
| 111 | |
| 112 | static void finalizeAnalysisEvalLP(SyncState* const syncState); |
| 113 | // The next group of functions is only needed when computing synchronization |
| 114 | // accuracy. |
| 115 | #ifdef HAVE_LIBGLPK |
| 116 | static glp_prob* lpCreateProblem(GQueue* const lowerHull, GQueue* const |
| 117 | upperHull); |
| 118 | static void gfLPAddRow(gpointer data, gpointer user_data); |
| 119 | static Factors* calculateFactors(glp_prob* const lp, const int direction); |
| 120 | static void calculateCompleteFactors(glp_prob* const lp, PairFactors* |
| 121 | factors); |
| 122 | static inline void finalizeAnalysisEvalLP(SyncState* const syncState); |
| 123 | static void gfAddAbsiscaToArray(gpointer data, gpointer user_data); |
| 124 | static gint gcfCompareDouble(gconstpointer a, gconstpointer b); |
| 125 | #else |
| 126 | static void finalizeAnalysisEvalLP(SyncState* const syncState); |
| 127 | #endif |
| 128 | |
| 129 | |
| 130 | // initialized in registerAnalysisEval() |
| 131 | double binBase; |
| 132 | |
| 133 | static AnalysisModule analysisModuleEval= { |
| 134 | .name= "eval", |
| 135 | .initAnalysis= &initAnalysisEval, |
| 136 | .destroyAnalysis= &destroyAnalysisEval, |
| 137 | .analyzeMessage= &analyzeMessageEval, |
| 138 | .analyzeExchange= &analyzeExchangeEval, |
| 139 | .analyzeBroadcast= &analyzeBroadcastEval, |
| 140 | .finalizeAnalysis= &finalizeAnalysisEval, |
| 141 | .printAnalysisStats= &printAnalysisStatsEval, |
| 142 | .graphFunctions= { |
| 143 | .writeTraceTimeBackPlots= &writeAnalysisTraceTimeBackPlotsEval, |
| 144 | .writeTraceTimeForePlots= &writeAnalysisTraceTimeForePlotsEval, |
| 145 | .writeTraceTraceBackPlots= &writeAnalysisTraceTraceBackPlotsEval, |
| 146 | .writeTraceTraceForePlots= &writeAnalysisTraceTraceForePlotsEval, |
| 147 | } |
| 148 | }; |
| 149 | |
| 150 | static ModuleOption optionEvalRttFile= { |
| 151 | .longName= "eval-rtt-file", |
| 152 | .hasArg= REQUIRED_ARG, |
| 153 | .optionHelp= "specify the file containing RTT information", |
| 154 | .argHelp= "FILE", |
| 155 | }; |
| 156 | |
| 157 | |
| 158 | /* |
| 159 | * Analysis module registering function |
| 160 | */ |
| 161 | void registerAnalysisEval() |
| 162 | { |
| 163 | binBase= exp10(6. / (BIN_NB - 3)); |
| 164 | |
| 165 | g_queue_push_tail(&analysisModules, &analysisModuleEval); |
| 166 | g_queue_push_tail(&moduleOptions, &optionEvalRttFile); |
| 167 | } |
| 168 | |
| 169 | |
| 170 | /* |
| 171 | * Analysis init function |
| 172 | * |
| 173 | * This function is called at the beginning of a synchronization run for a set |
| 174 | * of traces. |
| 175 | * |
| 176 | * Args: |
| 177 | * syncState container for synchronization data. |
| 178 | */ |
| 179 | static void initAnalysisEval(SyncState* const syncState) |
| 180 | { |
| 181 | AnalysisDataEval* analysisData; |
| 182 | unsigned int i, j; |
| 183 | |
| 184 | analysisData= malloc(sizeof(AnalysisDataEval)); |
| 185 | syncState->analysisData= analysisData; |
| 186 | |
| 187 | analysisData->rttInfo= g_hash_table_new_full(&ghfRttKeyHash, |
| 188 | &gefRttKeyEqual, &gdnDestroyRttKey, &gdnDestroyDouble); |
| 189 | if (optionEvalRttFile.arg) |
| 190 | { |
| 191 | FILE* rttStream; |
| 192 | int retval; |
| 193 | |
| 194 | rttStream= fopen(optionEvalRttFile.arg, "r"); |
| 195 | if (rttStream == NULL) |
| 196 | { |
| 197 | g_error(strerror(errno)); |
| 198 | } |
| 199 | |
| 200 | readRttInfo(analysisData->rttInfo, rttStream); |
| 201 | |
| 202 | retval= fclose(rttStream); |
| 203 | if (retval == EOF) |
| 204 | { |
| 205 | g_error(strerror(errno)); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | if (syncState->stats) |
| 210 | { |
| 211 | analysisData->stats= calloc(1, sizeof(AnalysisStatsEval)); |
| 212 | analysisData->stats->broadcastRangeMin= INFINITY; |
| 213 | analysisData->stats->broadcastRangeMax= -INFINITY; |
| 214 | |
| 215 | analysisData->stats->messageStats= malloc(syncState->traceNb * |
| 216 | sizeof(MessageStats*)); |
| 217 | for (i= 0; i < syncState->traceNb; i++) |
| 218 | { |
| 219 | analysisData->stats->messageStats[i]= calloc(syncState->traceNb, |
| 220 | sizeof(MessageStats)); |
| 221 | } |
| 222 | |
| 223 | analysisData->stats->exchangeRtt= |
| 224 | g_hash_table_new_full(&ghfRttKeyHash, &gefRttKeyEqual, |
| 225 | &gdnDestroyRttKey, &gdnDestroyDouble); |
| 226 | |
| 227 | #ifdef HAVE_LIBGLPK |
| 228 | analysisData->stats->chFactorsArray= NULL; |
| 229 | analysisData->stats->lpFactorsArray= NULL; |
| 230 | #endif |
| 231 | } |
| 232 | |
| 233 | if (syncState->graphsStream) |
| 234 | { |
| 235 | AnalysisGraphsEval* graphs= malloc(sizeof(AnalysisGraphsEval)); |
| 236 | |
| 237 | analysisData->graphs= graphs; |
| 238 | |
| 239 | graphs->histograms= g_hash_table_new_full(&ghfRttKeyHash, |
| 240 | &gefRttKeyEqual, &gdnDestroyRttKey, |
| 241 | &gdnDestroyAnalysisHistogramEval); |
| 242 | |
| 243 | graphs->bounds= malloc(syncState->traceNb * sizeof(Bounds*)); |
| 244 | for (i= 0; i < syncState->traceNb; i++) |
| 245 | { |
| 246 | graphs->bounds[i]= malloc(i * sizeof(Bounds)); |
| 247 | for (j= 0; j < i; j++) |
| 248 | { |
| 249 | graphs->bounds[i][j].min= UINT64_MAX; |
| 250 | graphs->bounds[i][j].max= 0; |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | #ifdef HAVE_LIBGLPK |
| 255 | graphs->lps= NULL; |
| 256 | graphs->lpFactorsArray= NULL; |
| 257 | #endif |
| 258 | } |
| 259 | |
| 260 | if (syncState->stats || syncState->graphsStream) |
| 261 | { |
| 262 | GList* result; |
| 263 | |
| 264 | analysisData->chullSS= malloc(sizeof(SyncState)); |
| 265 | memcpy(analysisData->chullSS, syncState, sizeof(SyncState)); |
| 266 | analysisData->chullSS->stats= false; |
| 267 | analysisData->chullSS->analysisData= NULL; |
| 268 | result= g_queue_find_custom(&analysisModules, "chull", |
| 269 | &gcfCompareAnalysis); |
| 270 | analysisData->chullSS->analysisModule= (AnalysisModule*) result->data; |
| 271 | analysisData->chullSS->analysisModule->initAnalysis(analysisData->chullSS); |
| 272 | } |
| 273 | } |
| 274 | |
| 275 | |
| 276 | /* |
| 277 | * Create and open files used to store histogram points to generate graphs. |
| 278 | * Create data structures to store histogram points during analysis. |
| 279 | * |
| 280 | * Args: |
| 281 | * graphsDir: folder where to write files |
| 282 | * rttKey: host pair, make sure saddr < daddr |
| 283 | */ |
| 284 | static AnalysisHistogramEval* constructAnalysisHistogramEval(const char* const |
| 285 | graphsDir, const struct RttKey* const rttKey) |
| 286 | { |
| 287 | int retval; |
| 288 | unsigned int i; |
| 289 | char* cwd; |
| 290 | char name[60], saddr[16], daddr[16]; |
| 291 | AnalysisHistogramEval* histogram= calloc(1, sizeof(*histogram)); |
| 292 | const struct { |
| 293 | size_t pointsOffset; |
| 294 | const char* fileName; |
| 295 | const char* host1, *host2; |
| 296 | } loopValues[]= { |
| 297 | {offsetof(AnalysisHistogramEval, ttSendPoints), |
| 298 | "analysis_eval_tt-%s_to_%s.data", saddr, daddr}, |
| 299 | {offsetof(AnalysisHistogramEval, ttRecvPoints), |
| 300 | "analysis_eval_tt-%s_to_%s.data", daddr, saddr}, |
| 301 | {offsetof(AnalysisHistogramEval, hrttPoints), |
| 302 | "analysis_eval_hrtt-%s_and_%s.data", saddr, daddr}, |
| 303 | }; |
| 304 | |
| 305 | histogram->ttSendBins.min= BIN_NB - 1; |
| 306 | histogram->ttRecvBins.min= BIN_NB - 1; |
| 307 | histogram->hrttBins.min= BIN_NB - 1; |
| 308 | |
| 309 | convertIP(saddr, rttKey->saddr); |
| 310 | convertIP(daddr, rttKey->daddr); |
| 311 | |
| 312 | cwd= changeToGraphsDir(graphsDir); |
| 313 | |
| 314 | for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++) |
| 315 | { |
| 316 | retval= snprintf(name, sizeof(name), loopValues[i].fileName, |
| 317 | loopValues[i].host1, loopValues[i].host2); |
| 318 | if (retval > sizeof(name) - 1) |
| 319 | { |
| 320 | name[sizeof(name) - 1]= '\0'; |
| 321 | } |
| 322 | if ((*(FILE**)((void*) histogram + loopValues[i].pointsOffset)= |
| 323 | fopen(name, "w")) == NULL) |
| 324 | { |
| 325 | g_error(strerror(errno)); |
| 326 | } |
| 327 | } |
| 328 | |
| 329 | retval= chdir(cwd); |
| 330 | if (retval == -1) |
| 331 | { |
| 332 | g_error(strerror(errno)); |
| 333 | } |
| 334 | free(cwd); |
| 335 | |
| 336 | return histogram; |
| 337 | } |
| 338 | |
| 339 | |
| 340 | /* |
| 341 | * Close files used to store histogram points to generate graphs. |
| 342 | * |
| 343 | * Args: |
| 344 | * graphsDir: folder where to write files |
| 345 | * rttKey: host pair, make sure saddr < daddr |
| 346 | */ |
| 347 | static void destroyAnalysisHistogramEval(AnalysisHistogramEval* const |
| 348 | histogram) |
| 349 | { |
| 350 | unsigned int i; |
| 351 | int retval; |
| 352 | const struct { |
| 353 | size_t pointsOffset; |
| 354 | } loopValues[]= { |
| 355 | {offsetof(AnalysisHistogramEval, ttSendPoints)}, |
| 356 | {offsetof(AnalysisHistogramEval, ttRecvPoints)}, |
| 357 | {offsetof(AnalysisHistogramEval, hrttPoints)}, |
| 358 | }; |
| 359 | |
| 360 | for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++) |
| 361 | { |
| 362 | retval= fclose(*(FILE**)((void*) histogram + loopValues[i].pointsOffset)); |
| 363 | if (retval != 0) |
| 364 | { |
| 365 | g_error(strerror(errno)); |
| 366 | } |
| 367 | } |
| 368 | |
| 369 | free(histogram); |
| 370 | } |
| 371 | |
| 372 | |
| 373 | /* |
| 374 | * A GDestroyNotify function for g_hash_table_new_full() |
| 375 | * |
| 376 | * Args: |
| 377 | * data: AnalysisHistogramEval* |
| 378 | */ |
| 379 | static void gdnDestroyAnalysisHistogramEval(gpointer data) |
| 380 | { |
| 381 | destroyAnalysisHistogramEval(data); |
| 382 | } |
| 383 | |
| 384 | |
| 385 | /* |
| 386 | * A GHFunc for g_hash_table_foreach() |
| 387 | * |
| 388 | * Args: |
| 389 | * key: RttKey* where saddr < daddr |
| 390 | * value: AnalysisHistogramEval* |
| 391 | * user_data struct WriteHistogramInfo* |
| 392 | */ |
| 393 | static void ghfWriteHistogram(gpointer key, gpointer value, gpointer user_data) |
| 394 | { |
| 395 | double* rtt1, * rtt2; |
| 396 | struct RttKey* rttKey= key; |
| 397 | struct RttKey oppositeRttKey= {.saddr= rttKey->daddr, .daddr= |
| 398 | rttKey->saddr}; |
| 399 | AnalysisHistogramEval* histogram= value; |
| 400 | struct WriteHistogramInfo* info= user_data; |
| 401 | |
| 402 | rtt1= g_hash_table_lookup(info->rttInfo, rttKey); |
| 403 | rtt2= g_hash_table_lookup(info->rttInfo, &oppositeRttKey); |
| 404 | |
| 405 | if (rtt1 == NULL) |
| 406 | { |
| 407 | rtt1= rtt2; |
| 408 | } |
| 409 | else if (rtt2 != NULL) |
| 410 | { |
| 411 | rtt1= MIN(rtt1, rtt2); |
| 412 | } |
| 413 | |
| 414 | dumpBinToFile(&histogram->ttSendBins, histogram->ttSendPoints); |
| 415 | dumpBinToFile(&histogram->ttRecvBins, histogram->ttRecvPoints); |
| 416 | dumpBinToFile(&histogram->hrttBins, histogram->hrttPoints); |
| 417 | writeHistogram(info->graphsStream, rttKey, rtt1, histogram); |
| 418 | } |
| 419 | |
| 420 | |
| 421 | /* |
| 422 | * Write the content of one bin in a histogram point file |
| 423 | * |
| 424 | * Args: |
| 425 | * bin: array of values that make up a histogram |
| 426 | * file: FILE*, write to this file |
| 427 | */ |
| 428 | static void dumpBinToFile(const struct Bins* const bins, FILE* const file) |
| 429 | { |
| 430 | unsigned int i; |
| 431 | |
| 432 | // The first and last bins are skipped, see struct Bins |
| 433 | for (i= 1; i < BIN_NB - 1; i++) |
| 434 | { |
| 435 | if (bins->bin[i] > 0) |
| 436 | { |
| 437 | fprintf(file, "%20.9f %20.9f %20.9f\n", (binStart(i) + binEnd(i)) |
| 438 | / 2., (double) bins->bin[i] / ((binEnd(i) - binStart(i)) * |
| 439 | bins->total), binEnd(i) - binStart(i)); |
| 440 | } |
| 441 | } |
| 442 | } |
| 443 | |
| 444 | |
| 445 | /* |
| 446 | * Write the analysis-specific plot in the gnuplot script. |
| 447 | * |
| 448 | * Args: |
| 449 | * graphsStream: write to this file |
| 450 | * rttKey: must be sorted such that saddr < daddr |
| 451 | * minRtt: if available, else NULL |
| 452 | * histogram: struct that contains the bins for the pair of traces |
| 453 | * identified by rttKey |
| 454 | */ |
| 455 | static void writeHistogram(FILE* graphsStream, const struct RttKey* rttKey, |
| 456 | double* minRtt, AnalysisHistogramEval* const histogram) |
| 457 | { |
| 458 | char saddr[16], daddr[16]; |
| 459 | |
| 460 | convertIP(saddr, rttKey->saddr); |
| 461 | convertIP(daddr, rttKey->daddr); |
| 462 | |
| 463 | fprintf(graphsStream, |
| 464 | "\nreset\n" |
| 465 | "set output \"histogram-%s-%s.eps\"\n" |
| 466 | "set title \"\"\n" |
| 467 | "set xlabel \"Message Latency (s)\"\n" |
| 468 | "set ylabel \"Proportion of messages per second\"\n", saddr, daddr); |
| 469 | |
| 470 | if (minRtt != NULL) |
| 471 | { |
| 472 | fprintf(graphsStream, |
| 473 | "set arrow from %.9f, 0 rto 0, graph 1 " |
| 474 | "nohead linetype 3 linewidth 3 linecolor rgb \"black\"\n", *minRtt |
| 475 | / 2); |
| 476 | } |
| 477 | |
| 478 | if (normalTotal(&histogram->ttSendBins) || |
| 479 | normalTotal(&histogram->ttRecvBins) || |
| 480 | normalTotal(&histogram->hrttBins)) |
| 481 | { |
| 482 | fprintf(graphsStream, "plot \\\n"); |
| 483 | |
| 484 | if (normalTotal(&histogram->hrttBins)) |
| 485 | { |
| 486 | fprintf(graphsStream, |
| 487 | "\t\"analysis_eval_hrtt-%s_and_%s.data\" " |
| 488 | "title \"RTT/2\" with linespoints linetype 1 linewidth 2 " |
| 489 | "linecolor rgb \"black\" pointtype 6 pointsize 1,\\\n", |
| 490 | saddr, daddr); |
| 491 | } |
| 492 | |
| 493 | if (normalTotal(&histogram->ttSendBins)) |
| 494 | { |
| 495 | fprintf(graphsStream, |
| 496 | "\t\"analysis_eval_tt-%1$s_to_%2$s.data\" " |
| 497 | "title \"%1$s to %2$s\" with linespoints linetype 4 linewidth 2 " |
| 498 | "linecolor rgb \"gray60\" pointtype 6 pointsize 1,\\\n", |
| 499 | saddr, daddr); |
| 500 | } |
| 501 | |
| 502 | if (normalTotal(&histogram->ttRecvBins)) |
| 503 | { |
| 504 | fprintf(graphsStream, |
| 505 | "\t\"analysis_eval_tt-%1$s_to_%2$s.data\" " |
| 506 | "title \"%1$s to %2$s\" with linespoints linetype 4 linewidth 2 " |
| 507 | "linecolor rgb \"gray30\" pointtype 6 pointsize 1,\\\n", |
| 508 | daddr, saddr); |
| 509 | } |
| 510 | |
| 511 | // Remove the ",\\\n" from the last graph plot line |
| 512 | if (ftruncate(fileno(graphsStream), ftell(graphsStream) - 3) == -1) |
| 513 | { |
| 514 | g_error(strerror(errno)); |
| 515 | } |
| 516 | if (fseek(graphsStream, 0, SEEK_END) == -1) |
| 517 | { |
| 518 | g_error(strerror(errno)); |
| 519 | } |
| 520 | fprintf(graphsStream, "\n"); |
| 521 | } |
| 522 | } |
| 523 | |
| 524 | |
| 525 | /* |
| 526 | * Analysis destroy function |
| 527 | * |
| 528 | * Free the analysis specific data structures |
| 529 | * |
| 530 | * Args: |
| 531 | * syncState container for synchronization data. |
| 532 | */ |
| 533 | static void destroyAnalysisEval(SyncState* const syncState) |
| 534 | { |
| 535 | unsigned int i; |
| 536 | AnalysisDataEval* analysisData; |
| 537 | |
| 538 | analysisData= (AnalysisDataEval*) syncState->analysisData; |
| 539 | |
| 540 | if (analysisData == NULL) |
| 541 | { |
| 542 | return; |
| 543 | } |
| 544 | |
| 545 | g_hash_table_destroy(analysisData->rttInfo); |
| 546 | |
| 547 | if (syncState->stats) |
| 548 | { |
| 549 | AnalysisStatsEval* stats= analysisData->stats; |
| 550 | |
| 551 | for (i= 0; i < syncState->traceNb; i++) |
| 552 | { |
| 553 | free(stats->messageStats[i]); |
| 554 | } |
| 555 | free(stats->messageStats); |
| 556 | |
| 557 | g_hash_table_destroy(stats->exchangeRtt); |
| 558 | |
| 559 | #ifdef HAVE_LIBGLPK |
| 560 | freeAllFactors(stats->chFactorsArray, syncState->traceNb); |
| 561 | freeAllFactors(stats->lpFactorsArray, syncState->traceNb); |
| 562 | #endif |
| 563 | |
| 564 | free(stats); |
| 565 | } |
| 566 | |
| 567 | if (syncState->graphsStream) |
| 568 | { |
| 569 | AnalysisGraphsEval* graphs= analysisData->graphs; |
| 570 | |
| 571 | if (graphs->histograms) |
| 572 | { |
| 573 | g_hash_table_destroy(graphs->histograms); |
| 574 | } |
| 575 | |
| 576 | for (i= 0; i < syncState->traceNb; i++) |
| 577 | { |
| 578 | free(graphs->bounds[i]); |
| 579 | } |
| 580 | free(graphs->bounds); |
| 581 | |
| 582 | #ifdef HAVE_LIBGLPK |
| 583 | for (i= 0; i < syncState->traceNb; i++) |
| 584 | { |
| 585 | unsigned int j; |
| 586 | |
| 587 | for (j= 0; j < i; j++) |
| 588 | { |
| 589 | // There seems to be a memory leak in glpk, valgrind reports a |
| 590 | // loss (reachable) even if the problem is deleted |
| 591 | glp_delete_prob(graphs->lps[i][j]); |
| 592 | } |
| 593 | free(graphs->lps[i]); |
| 594 | } |
| 595 | free(graphs->lps); |
| 596 | |
| 597 | if (!syncState->stats) |
| 598 | { |
| 599 | freeAllFactors(graphs->lpFactorsArray, syncState->traceNb); |
| 600 | } |
| 601 | #endif |
| 602 | |
| 603 | free(graphs); |
| 604 | } |
| 605 | |
| 606 | if (syncState->stats || syncState->graphsStream) |
| 607 | { |
| 608 | analysisData->chullSS->analysisModule->destroyAnalysis(analysisData->chullSS); |
| 609 | free(analysisData->chullSS); |
| 610 | } |
| 611 | |
| 612 | free(syncState->analysisData); |
| 613 | syncState->analysisData= NULL; |
| 614 | } |
| 615 | |
| 616 | |
| 617 | /* |
| 618 | * Perform analysis on an event pair. |
| 619 | * |
| 620 | * Check if there is message inversion or messages that are too fast. |
| 621 | * |
| 622 | * Args: |
| 623 | * syncState container for synchronization data |
| 624 | * message structure containing the events |
| 625 | */ |
| 626 | static void analyzeMessageEval(SyncState* const syncState, Message* const |
| 627 | message) |
| 628 | { |
| 629 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 630 | MessageStats* messageStats; |
| 631 | double* rtt; |
| 632 | double tt; |
| 633 | struct RttKey rttKey; |
| 634 | |
| 635 | g_assert(message->inE->type == TCP); |
| 636 | |
| 637 | if (syncState->stats) |
| 638 | { |
| 639 | messageStats= |
| 640 | &analysisData->stats->messageStats[message->outE->traceNum][message->inE->traceNum]; |
| 641 | messageStats->total++; |
| 642 | } |
| 643 | |
| 644 | tt= wallTimeSub(&message->inE->wallTime, &message->outE->wallTime); |
| 645 | if (tt <= 0) |
| 646 | { |
| 647 | if (syncState->stats) |
| 648 | { |
| 649 | messageStats->inversionNb++; |
| 650 | } |
| 651 | } |
| 652 | else if (syncState->graphsStream) |
| 653 | { |
| 654 | struct RttKey rttKey= { |
| 655 | .saddr=MIN(message->inE->event.tcpEvent->segmentKey->connectionKey.saddr, |
| 656 | message->inE->event.tcpEvent->segmentKey->connectionKey.daddr), |
| 657 | .daddr=MAX(message->inE->event.tcpEvent->segmentKey->connectionKey.saddr, |
| 658 | message->inE->event.tcpEvent->segmentKey->connectionKey.daddr), |
| 659 | }; |
| 660 | AnalysisHistogramEval* histogram= |
| 661 | g_hash_table_lookup(analysisData->graphs->histograms, &rttKey); |
| 662 | |
| 663 | if (histogram == NULL) |
| 664 | { |
| 665 | struct RttKey* tableKey= malloc(sizeof(*tableKey)); |
| 666 | |
| 667 | histogram= constructAnalysisHistogramEval(syncState->graphsDir, &rttKey); |
| 668 | memcpy(tableKey, &rttKey, sizeof(*tableKey)); |
| 669 | g_hash_table_insert(analysisData->graphs->histograms, tableKey, histogram); |
| 670 | } |
| 671 | |
| 672 | if (message->inE->event.udpEvent->datagramKey->saddr < |
| 673 | message->inE->event.udpEvent->datagramKey->daddr) |
| 674 | { |
| 675 | hitBin(&histogram->ttSendBins, tt); |
| 676 | } |
| 677 | else |
| 678 | { |
| 679 | hitBin(&histogram->ttRecvBins, tt); |
| 680 | } |
| 681 | } |
| 682 | |
| 683 | if (syncState->stats) |
| 684 | { |
| 685 | rttKey.saddr= |
| 686 | message->inE->event.tcpEvent->segmentKey->connectionKey.saddr; |
| 687 | rttKey.daddr= |
| 688 | message->inE->event.tcpEvent->segmentKey->connectionKey.daddr; |
| 689 | rtt= g_hash_table_lookup(analysisData->rttInfo, &rttKey); |
| 690 | g_debug("rttInfo, looking up (%u, %u)->(%f)", rttKey.saddr, |
| 691 | rttKey.daddr, rtt ? *rtt : NAN); |
| 692 | |
| 693 | if (rtt) |
| 694 | { |
| 695 | g_debug("rttInfo, tt: %f rtt / 2: %f", tt, *rtt / 2.); |
| 696 | if (tt < *rtt / 2.) |
| 697 | { |
| 698 | messageStats->tooFastNb++; |
| 699 | } |
| 700 | } |
| 701 | else |
| 702 | { |
| 703 | messageStats->noRTTInfoNb++; |
| 704 | } |
| 705 | } |
| 706 | |
| 707 | if (syncState->graphsStream) |
| 708 | { |
| 709 | updateBounds(analysisData->graphs->bounds, message->inE, |
| 710 | message->outE); |
| 711 | } |
| 712 | |
| 713 | if (syncState->stats || syncState->graphsStream) |
| 714 | { |
| 715 | analysisData->chullSS->analysisModule->analyzeMessage(analysisData->chullSS, |
| 716 | message); |
| 717 | } |
| 718 | } |
| 719 | |
| 720 | |
| 721 | /* |
| 722 | * Perform analysis on multiple messages |
| 723 | * |
| 724 | * Measure the RTT |
| 725 | * |
| 726 | * Args: |
| 727 | * syncState container for synchronization data |
| 728 | * exchange structure containing the messages |
| 729 | */ |
| 730 | static void analyzeExchangeEval(SyncState* const syncState, Exchange* const |
| 731 | exchange) |
| 732 | { |
| 733 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 734 | Message* m1= g_queue_peek_tail(exchange->acks); |
| 735 | Message* m2= exchange->message; |
| 736 | struct RttKey* rttKey; |
| 737 | double* rtt, * exchangeRtt; |
| 738 | |
| 739 | g_assert(m1->inE->type == TCP); |
| 740 | |
| 741 | // (T2 - T1) - (T3 - T4) |
| 742 | rtt= malloc(sizeof(double)); |
| 743 | *rtt= wallTimeSub(&m1->inE->wallTime, &m1->outE->wallTime) - |
| 744 | wallTimeSub(&m2->outE->wallTime, &m2->inE->wallTime); |
| 745 | |
| 746 | rttKey= malloc(sizeof(struct RttKey)); |
| 747 | rttKey->saddr= |
| 748 | MIN(m1->inE->event.tcpEvent->segmentKey->connectionKey.saddr, |
| 749 | m1->inE->event.tcpEvent->segmentKey->connectionKey.daddr); |
| 750 | rttKey->daddr= |
| 751 | MAX(m1->inE->event.tcpEvent->segmentKey->connectionKey.saddr, |
| 752 | m1->inE->event.tcpEvent->segmentKey->connectionKey.daddr); |
| 753 | |
| 754 | if (syncState->graphsStream) |
| 755 | { |
| 756 | AnalysisHistogramEval* histogram= |
| 757 | g_hash_table_lookup(analysisData->graphs->histograms, rttKey); |
| 758 | |
| 759 | if (histogram == NULL) |
| 760 | { |
| 761 | struct RttKey* tableKey= malloc(sizeof(*tableKey)); |
| 762 | |
| 763 | histogram= constructAnalysisHistogramEval(syncState->graphsDir, |
| 764 | rttKey); |
| 765 | memcpy(tableKey, rttKey, sizeof(*tableKey)); |
| 766 | g_hash_table_insert(analysisData->graphs->histograms, tableKey, |
| 767 | histogram); |
| 768 | } |
| 769 | |
| 770 | hitBin(&histogram->hrttBins, *rtt / 2); |
| 771 | } |
| 772 | |
| 773 | if (syncState->stats) |
| 774 | { |
| 775 | exchangeRtt= g_hash_table_lookup(analysisData->stats->exchangeRtt, |
| 776 | rttKey); |
| 777 | |
| 778 | if (exchangeRtt) |
| 779 | { |
| 780 | if (*rtt < *exchangeRtt) |
| 781 | { |
| 782 | g_hash_table_replace(analysisData->stats->exchangeRtt, rttKey, rtt); |
| 783 | } |
| 784 | else |
| 785 | { |
| 786 | free(rttKey); |
| 787 | free(rtt); |
| 788 | } |
| 789 | } |
| 790 | else |
| 791 | { |
| 792 | g_hash_table_insert(analysisData->stats->exchangeRtt, rttKey, rtt); |
| 793 | } |
| 794 | } |
| 795 | else |
| 796 | { |
| 797 | free(rttKey); |
| 798 | free(rtt); |
| 799 | } |
| 800 | } |
| 801 | |
| 802 | |
| 803 | /* |
| 804 | * Perform analysis on muliple events |
| 805 | * |
| 806 | * Sum the broadcast differential delays |
| 807 | * |
| 808 | * Args: |
| 809 | * syncState container for synchronization data |
| 810 | * broadcast structure containing the events |
| 811 | */ |
| 812 | static void analyzeBroadcastEval(SyncState* const syncState, Broadcast* const |
| 813 | broadcast) |
| 814 | { |
| 815 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 816 | |
| 817 | if (syncState->stats) |
| 818 | { |
| 819 | double sum= 0, squaresSum= 0; |
| 820 | double y; |
| 821 | |
| 822 | g_queue_foreach(broadcast->events, &gfSum, &sum); |
| 823 | g_queue_foreach(broadcast->events, &gfSumSquares, &squaresSum); |
| 824 | |
| 825 | analysisData->stats->broadcastNb++; |
| 826 | // Because of numerical errors, this can at times be < 0 |
| 827 | y= squaresSum / g_queue_get_length(broadcast->events) - pow(sum / |
| 828 | g_queue_get_length(broadcast->events), 2.); |
| 829 | if (y > 0) |
| 830 | { |
| 831 | analysisData->stats->broadcastStdevSum+= sqrt(y); |
| 832 | } |
| 833 | |
| 834 | if (syncState->traceNb == 2 && g_queue_get_length(broadcast->events) |
| 835 | == 2) |
| 836 | { |
| 837 | Event* e0, * e1; |
| 838 | double dd; |
| 839 | |
| 840 | e0= g_queue_peek_head(broadcast->events); |
| 841 | e1= g_queue_peek_tail(broadcast->events); |
| 842 | if (e0->traceNum > e1->traceNum) |
| 843 | { |
| 844 | Event* tmp; |
| 845 | |
| 846 | tmp= e0; |
| 847 | e0= e1; |
| 848 | e1= tmp; |
| 849 | } |
| 850 | |
| 851 | dd= wallTimeSub(&e1->wallTime, &e0->wallTime); |
| 852 | |
| 853 | analysisData->stats->broadcastPairNb++; |
| 854 | if (dd < analysisData->stats->broadcastRangeMin) |
| 855 | { |
| 856 | analysisData->stats->broadcastRangeMin= dd; |
| 857 | } |
| 858 | if (dd > analysisData->stats->broadcastRangeMax) |
| 859 | { |
| 860 | analysisData->stats->broadcastRangeMax= dd; |
| 861 | } |
| 862 | |
| 863 | analysisData->stats->broadcastSum+= dd; |
| 864 | analysisData->stats->broadcastSumSquares+= pow(dd, 2); |
| 865 | } |
| 866 | } |
| 867 | |
| 868 | if (syncState->graphsStream) |
| 869 | { |
| 870 | unsigned int i, j; |
| 871 | GArray* events; |
| 872 | unsigned int eventNb= broadcast->events->length; |
| 873 | |
| 874 | events= g_array_sized_new(FALSE, FALSE, sizeof(Event*), eventNb); |
| 875 | g_queue_foreach(broadcast->events, &gfAddEventToArray, events); |
| 876 | |
| 877 | for (i= 0; i < eventNb; i++) |
| 878 | { |
| 879 | for (j= 0; j < eventNb; j++) |
| 880 | { |
| 881 | Event* eventI= g_array_index(events, Event*, i), * eventJ= |
| 882 | g_array_index(events, Event*, j); |
| 883 | |
| 884 | if (eventI->traceNum < eventJ->traceNum) |
| 885 | { |
| 886 | updateBounds(analysisData->graphs->bounds, eventI, eventJ); |
| 887 | } |
| 888 | } |
| 889 | } |
| 890 | |
| 891 | g_array_free(events, TRUE); |
| 892 | } |
| 893 | } |
| 894 | |
| 895 | |
| 896 | /* |
| 897 | * Finalize the factor calculations. Since this module does not really |
| 898 | * calculate factors, absent factors are returned. Instead, histograms are |
| 899 | * written out and histogram structures are freed. |
| 900 | * |
| 901 | * Args: |
| 902 | * syncState container for synchronization data. |
| 903 | * |
| 904 | * Returns: |
| 905 | * AllFactors* synchronization factors for each trace pair |
| 906 | */ |
| 907 | static AllFactors* finalizeAnalysisEval(SyncState* const syncState) |
| 908 | { |
| 909 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 910 | |
| 911 | if (syncState->graphsStream && analysisData->graphs->histograms) |
| 912 | { |
| 913 | g_hash_table_foreach(analysisData->graphs->histograms, |
| 914 | &ghfWriteHistogram, &(struct WriteHistogramInfo) {.rttInfo= |
| 915 | analysisData->rttInfo, .graphsStream= syncState->graphsStream}); |
| 916 | g_hash_table_destroy(analysisData->graphs->histograms); |
| 917 | analysisData->graphs->histograms= NULL; |
| 918 | } |
| 919 | |
| 920 | finalizeAnalysisEvalLP(syncState); |
| 921 | |
| 922 | return createAllFactors(syncState->traceNb); |
| 923 | } |
| 924 | |
| 925 | |
| 926 | /* |
| 927 | * Print statistics related to analysis. Must be called after |
| 928 | * finalizeAnalysis. |
| 929 | * |
| 930 | * Args: |
| 931 | * syncState container for synchronization data. |
| 932 | */ |
| 933 | static void printAnalysisStatsEval(SyncState* const syncState) |
| 934 | { |
| 935 | AnalysisDataEval* analysisData; |
| 936 | unsigned int i, j, k; |
| 937 | unsigned int totInversion= 0, totTooFast= 0, totNoInfo= 0, totTotal= 0; |
| 938 | int charNb; |
| 939 | |
| 940 | if (!syncState->stats) |
| 941 | { |
| 942 | return; |
| 943 | } |
| 944 | |
| 945 | analysisData= (AnalysisDataEval*) syncState->analysisData; |
| 946 | |
| 947 | printf("Synchronization evaluation analysis stats:\n"); |
| 948 | if (analysisData->stats->broadcastNb) |
| 949 | { |
| 950 | printf("\tBroadcast differential delay:\n"); |
| 951 | printf("\t\tsum of standard deviations: %g\n", |
| 952 | analysisData->stats->broadcastStdevSum); |
| 953 | printf("\t\taverage standard deviation: %g\n", |
| 954 | analysisData->stats->broadcastStdevSum / |
| 955 | analysisData->stats->broadcastNb); |
| 956 | |
| 957 | if (syncState->traceNb == 2) |
| 958 | { |
| 959 | printf("\t\tdifferential delay range: [ %g .. %g ]\n", |
| 960 | analysisData->stats->broadcastRangeMin, |
| 961 | analysisData->stats->broadcastRangeMax); |
| 962 | printf("\t\tdifferential delay average: %g\n", |
| 963 | analysisData->stats->broadcastSum / |
| 964 | analysisData->stats->broadcastPairNb); |
| 965 | printf("\t\tdifferential delay standard deviation: %g\n", |
| 966 | sqrt(analysisData->stats->broadcastSumSquares / |
| 967 | analysisData->stats->broadcastPairNb - |
| 968 | pow(analysisData->stats->broadcastSum / |
| 969 | analysisData->stats->broadcastPairNb, 2))); |
| 970 | } |
| 971 | } |
| 972 | |
| 973 | printf("\tIndividual evaluation:\n" |
| 974 | "\t\tTrace pair Inversions Too fast No RTT info Total\n"); |
| 975 | |
| 976 | for (i= 0; i < syncState->traceNb; i++) |
| 977 | { |
| 978 | for (j= i + 1; j < syncState->traceNb; j++) |
| 979 | { |
| 980 | MessageStats* messageStats; |
| 981 | struct { |
| 982 | unsigned int t1, t2; |
| 983 | } loopValues[]= { |
| 984 | {i, j}, |
| 985 | {j, i} |
| 986 | }; |
| 987 | |
| 988 | for (k= 0; k < sizeof(loopValues) / sizeof(*loopValues); k++) |
| 989 | { |
| 990 | messageStats= |
| 991 | &analysisData->stats->messageStats[loopValues[k].t1][loopValues[k].t2]; |
| 992 | |
| 993 | printf("\t\t%3d - %-3d ", loopValues[k].t1, loopValues[k].t2); |
| 994 | printf("%u (%.2f%%)%n", messageStats->inversionNb, (double) |
| 995 | messageStats->inversionNb / messageStats->total * 100, |
| 996 | &charNb); |
| 997 | printf("%*s", 17 - charNb > 0 ? 17 - charNb + 1: 1, " "); |
| 998 | printf("%u (%.2f%%)%n", messageStats->tooFastNb, (double) |
| 999 | messageStats->tooFastNb / messageStats->total * 100, |
| 1000 | &charNb); |
| 1001 | printf("%*s%-10u %u\n", 17 - charNb > 0 ? 17 - charNb + 1: |
| 1002 | 1, " ", messageStats->noRTTInfoNb, messageStats->total); |
| 1003 | |
| 1004 | totInversion+= messageStats->inversionNb; |
| 1005 | totTooFast+= messageStats->tooFastNb; |
| 1006 | totNoInfo+= messageStats->noRTTInfoNb; |
| 1007 | totTotal+= messageStats->total; |
| 1008 | } |
| 1009 | } |
| 1010 | } |
| 1011 | |
| 1012 | printf("\t\t total "); |
| 1013 | printf("%u (%.2f%%)%n", totInversion, (double) totInversion / totTotal * |
| 1014 | 100, &charNb); |
| 1015 | printf("%*s", 17 - charNb > 0 ? 17 - charNb + 1: 1, " "); |
| 1016 | printf("%u (%.2f%%)%n", totTooFast, (double) totTooFast / totTotal * 100, |
| 1017 | &charNb); |
| 1018 | printf("%*s%-10u %u\n", 17 - charNb > 0 ? 17 - charNb + 1: 1, " ", |
| 1019 | totNoInfo, totTotal); |
| 1020 | |
| 1021 | printf("\tRound-trip times:\n" |
| 1022 | "\t\tHost pair RTT from exchanges RTTs from file (ms)\n"); |
| 1023 | g_hash_table_foreach(analysisData->stats->exchangeRtt, |
| 1024 | &ghfPrintExchangeRtt, analysisData->rttInfo); |
| 1025 | |
| 1026 | #ifdef HAVE_LIBGLPK |
| 1027 | printf("\tConvex hull factors comparisons:\n" |
| 1028 | "\t\tTrace pair Factors type Differences (lp - chull)\n" |
| 1029 | "\t\t a0 a1\n" |
| 1030 | "\t\t Min Max Min Max\n"); |
| 1031 | |
| 1032 | for (i= 0; i < syncState->traceNb; i++) |
| 1033 | { |
| 1034 | for (j= 0; j < i; j++) |
| 1035 | { |
| 1036 | PairFactors* chFactors= |
| 1037 | &analysisData->stats->chFactorsArray->pairFactors[i][j]; |
| 1038 | PairFactors* lpFactors= |
| 1039 | &analysisData->stats->lpFactorsArray->pairFactors[i][j]; |
| 1040 | |
| 1041 | printf("\t\t%3d - %-3d ", i, j); |
| 1042 | if (lpFactors->type == chFactors->type) |
| 1043 | { |
| 1044 | if (lpFactors->type == ACCURATE) |
| 1045 | { |
| 1046 | printf("%-13s %-10.4g %-10.4g %-10.4g %.4g\n", |
| 1047 | approxNames[lpFactors->type], |
| 1048 | lpFactors->min->offset - chFactors->min->offset, |
| 1049 | lpFactors->max->offset - chFactors->max->offset, |
| 1050 | lpFactors->min->drift - chFactors->min->drift, |
| 1051 | lpFactors->max->drift - chFactors->max->drift); |
| 1052 | } |
| 1053 | else if (lpFactors->type == ABSENT) |
| 1054 | { |
| 1055 | printf("%s\n", approxNames[lpFactors->type]); |
| 1056 | } |
| 1057 | } |
| 1058 | else |
| 1059 | { |
| 1060 | printf("Different! %s and %s\n", approxNames[lpFactors->type], |
| 1061 | approxNames[chFactors->type]); |
| 1062 | } |
| 1063 | } |
| 1064 | } |
| 1065 | #endif |
| 1066 | } |
| 1067 | |
| 1068 | |
| 1069 | /* |
| 1070 | * A GHFunc for g_hash_table_foreach() |
| 1071 | * |
| 1072 | * Args: |
| 1073 | * key: RttKey* where saddr < daddr |
| 1074 | * value: double*, RTT estimated from exchanges |
| 1075 | * user_data GHashTable* rttInfo |
| 1076 | */ |
| 1077 | static void ghfPrintExchangeRtt(gpointer key, gpointer value, gpointer |
| 1078 | user_data) |
| 1079 | { |
| 1080 | char addr1[16], addr2[16]; |
| 1081 | struct RttKey* rttKey1= key; |
| 1082 | struct RttKey rttKey2= {rttKey1->daddr, rttKey1->saddr}; |
| 1083 | double* fileRtt1, *fileRtt2; |
| 1084 | GHashTable* rttInfo= user_data; |
| 1085 | |
| 1086 | convertIP(addr1, rttKey1->saddr); |
| 1087 | convertIP(addr2, rttKey1->daddr); |
| 1088 | |
| 1089 | fileRtt1= g_hash_table_lookup(rttInfo, rttKey1); |
| 1090 | fileRtt2= g_hash_table_lookup(rttInfo, &rttKey2); |
| 1091 | |
| 1092 | printf("\t\t(%15s, %-15s) %-18.3f ", addr1, addr2, *(double*) value * 1e3); |
| 1093 | |
| 1094 | if (fileRtt1 || fileRtt2) |
| 1095 | { |
| 1096 | if (fileRtt1) |
| 1097 | { |
| 1098 | printf("%.3f", *fileRtt1 * 1e3); |
| 1099 | } |
| 1100 | if (fileRtt1 && fileRtt2) |
| 1101 | { |
| 1102 | printf(", "); |
| 1103 | } |
| 1104 | if (fileRtt2) |
| 1105 | { |
| 1106 | printf("%.3f", *fileRtt2 * 1e3); |
| 1107 | } |
| 1108 | } |
| 1109 | else |
| 1110 | { |
| 1111 | printf("-"); |
| 1112 | } |
| 1113 | printf("\n"); |
| 1114 | } |
| 1115 | |
| 1116 | |
| 1117 | /* |
| 1118 | * A GHashFunc for g_hash_table_new() |
| 1119 | * |
| 1120 | * Args: |
| 1121 | * key struct RttKey* |
| 1122 | */ |
| 1123 | static guint ghfRttKeyHash(gconstpointer key) |
| 1124 | { |
| 1125 | struct RttKey* rttKey; |
| 1126 | uint32_t a, b, c; |
| 1127 | |
| 1128 | rttKey= (struct RttKey*) key; |
| 1129 | |
| 1130 | a= rttKey->saddr; |
| 1131 | b= rttKey->daddr; |
| 1132 | c= 0; |
| 1133 | final(a, b, c); |
| 1134 | |
| 1135 | return c; |
| 1136 | } |
| 1137 | |
| 1138 | |
| 1139 | /* |
| 1140 | * A GDestroyNotify function for g_hash_table_new_full() |
| 1141 | * |
| 1142 | * Args: |
| 1143 | * data: struct RttKey* |
| 1144 | */ |
| 1145 | static void gdnDestroyRttKey(gpointer data) |
| 1146 | { |
| 1147 | free(data); |
| 1148 | } |
| 1149 | |
| 1150 | |
| 1151 | /* |
| 1152 | * A GDestroyNotify function for g_hash_table_new_full() |
| 1153 | * |
| 1154 | * Args: |
| 1155 | * data: double* |
| 1156 | */ |
| 1157 | static void gdnDestroyDouble(gpointer data) |
| 1158 | { |
| 1159 | free(data); |
| 1160 | } |
| 1161 | |
| 1162 | |
| 1163 | /* |
| 1164 | * A GEqualFunc for g_hash_table_new() |
| 1165 | * |
| 1166 | * Args: |
| 1167 | * a, b RttKey* |
| 1168 | * |
| 1169 | * Returns: |
| 1170 | * TRUE if both values are equal |
| 1171 | */ |
| 1172 | static gboolean gefRttKeyEqual(gconstpointer a, gconstpointer b) |
| 1173 | { |
| 1174 | const struct RttKey* rkA, * rkB; |
| 1175 | |
| 1176 | rkA= (struct RttKey*) a; |
| 1177 | rkB= (struct RttKey*) b; |
| 1178 | |
| 1179 | if (rkA->saddr == rkB->saddr && rkA->daddr == rkB->daddr) |
| 1180 | { |
| 1181 | return TRUE; |
| 1182 | } |
| 1183 | else |
| 1184 | { |
| 1185 | return FALSE; |
| 1186 | } |
| 1187 | } |
| 1188 | |
| 1189 | |
| 1190 | /* |
| 1191 | * Read a file contain minimum round trip time values and fill an array with |
| 1192 | * them. The file is formatted as such: |
| 1193 | * <host1 IP> <host2 IP> <RTT in milliseconds> |
| 1194 | * ip's should be in dotted quad format |
| 1195 | * |
| 1196 | * Args: |
| 1197 | * rttInfo: double* rttInfo[RttKey], empty table, will be filled |
| 1198 | * rttStream: stream from which to read |
| 1199 | */ |
| 1200 | static void readRttInfo(GHashTable* rttInfo, FILE* rttStream) |
| 1201 | { |
| 1202 | char* line= NULL; |
| 1203 | size_t len; |
| 1204 | int retval; |
| 1205 | |
| 1206 | positionStream(rttStream); |
| 1207 | retval= getline(&line, &len, rttStream); |
| 1208 | while(!feof(rttStream)) |
| 1209 | { |
| 1210 | struct RttKey* rttKey; |
| 1211 | char saddrDQ[20], daddrDQ[20]; |
| 1212 | double* rtt; |
| 1213 | char tmp; |
| 1214 | struct in_addr addr; |
| 1215 | unsigned int i; |
| 1216 | struct { |
| 1217 | char* dq; |
| 1218 | size_t offset; |
| 1219 | } loopValues[] = { |
| 1220 | {saddrDQ, offsetof(struct RttKey, saddr)}, |
| 1221 | {daddrDQ, offsetof(struct RttKey, daddr)} |
| 1222 | }; |
| 1223 | |
| 1224 | if (retval == -1 && !feof(rttStream)) |
| 1225 | { |
| 1226 | g_error(strerror(errno)); |
| 1227 | } |
| 1228 | |
| 1229 | if (line[retval - 1] == '\n') |
| 1230 | { |
| 1231 | line[retval - 1]= '\0'; |
| 1232 | } |
| 1233 | |
| 1234 | rtt= malloc(sizeof(double)); |
| 1235 | retval= sscanf(line, " %19s %19s %lf %c", saddrDQ, daddrDQ, rtt, |
| 1236 | &tmp); |
| 1237 | if (retval == EOF) |
| 1238 | { |
| 1239 | g_error(strerror(errno)); |
| 1240 | } |
| 1241 | else if (retval != 3) |
| 1242 | { |
| 1243 | g_error("Error parsing RTT file, line was '%s'", line); |
| 1244 | } |
| 1245 | |
| 1246 | rttKey= malloc(sizeof(struct RttKey)); |
| 1247 | for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++) |
| 1248 | { |
| 1249 | retval= inet_aton(loopValues[i].dq, &addr); |
| 1250 | if (retval == 0) |
| 1251 | { |
| 1252 | g_error("Error converting address '%s'", loopValues[i].dq); |
| 1253 | } |
| 1254 | *(uint32_t*) ((void*) rttKey + loopValues[i].offset)= |
| 1255 | addr.s_addr; |
| 1256 | } |
| 1257 | |
| 1258 | *rtt/= 1e3; |
| 1259 | g_debug("rttInfo, Inserting (%u, %u)->(%f)", rttKey->saddr, |
| 1260 | rttKey->daddr, *rtt); |
| 1261 | g_hash_table_insert(rttInfo, rttKey, rtt); |
| 1262 | |
| 1263 | positionStream(rttStream); |
| 1264 | retval= getline(&line, &len, rttStream); |
| 1265 | } |
| 1266 | |
| 1267 | if (line) |
| 1268 | { |
| 1269 | free(line); |
| 1270 | } |
| 1271 | } |
| 1272 | |
| 1273 | |
| 1274 | /* |
| 1275 | * Advance stream over empty space, empty lines and lines that begin with '#' |
| 1276 | * |
| 1277 | * Args: |
| 1278 | * stream: stream, at exit, will be over the first non-empty character |
| 1279 | * of a line of be at EOF |
| 1280 | */ |
| 1281 | static void positionStream(FILE* stream) |
| 1282 | { |
| 1283 | int firstChar; |
| 1284 | ssize_t retval; |
| 1285 | char* line= NULL; |
| 1286 | size_t len; |
| 1287 | |
| 1288 | do |
| 1289 | { |
| 1290 | firstChar= fgetc(stream); |
| 1291 | if (firstChar == (int) '#') |
| 1292 | { |
| 1293 | retval= getline(&line, &len, stream); |
| 1294 | if (retval == -1) |
| 1295 | { |
| 1296 | if (feof(stream)) |
| 1297 | { |
| 1298 | goto outEof; |
| 1299 | } |
| 1300 | else |
| 1301 | { |
| 1302 | g_error(strerror(errno)); |
| 1303 | } |
| 1304 | } |
| 1305 | } |
| 1306 | else if (firstChar == (int) '\n' || firstChar == (int) ' ' || |
| 1307 | firstChar == (int) '\t') |
| 1308 | {} |
| 1309 | else if (firstChar == EOF) |
| 1310 | { |
| 1311 | goto outEof; |
| 1312 | } |
| 1313 | else |
| 1314 | { |
| 1315 | break; |
| 1316 | } |
| 1317 | } while (true); |
| 1318 | retval= ungetc(firstChar, stream); |
| 1319 | if (retval == EOF) |
| 1320 | { |
| 1321 | g_error("Error: ungetc()"); |
| 1322 | } |
| 1323 | |
| 1324 | outEof: |
| 1325 | if (line) |
| 1326 | { |
| 1327 | free(line); |
| 1328 | } |
| 1329 | } |
| 1330 | |
| 1331 | |
| 1332 | /* |
| 1333 | * A GFunc for g_queue_foreach() |
| 1334 | * |
| 1335 | * Args: |
| 1336 | * data Event*, a UDP broadcast event |
| 1337 | * user_data double*, the running sum |
| 1338 | * |
| 1339 | * Returns: |
| 1340 | * Adds the time of the event to the sum |
| 1341 | */ |
| 1342 | static void gfSum(gpointer data, gpointer userData) |
| 1343 | { |
| 1344 | Event* event= (Event*) data; |
| 1345 | |
| 1346 | *(double*) userData+= event->wallTime.seconds + event->wallTime.nanosec / |
| 1347 | 1e9; |
| 1348 | } |
| 1349 | |
| 1350 | |
| 1351 | /* |
| 1352 | * A GFunc for g_queue_foreach() |
| 1353 | * |
| 1354 | * Args: |
| 1355 | * data Event*, a UDP broadcast event |
| 1356 | * user_data double*, the running sum |
| 1357 | * |
| 1358 | * Returns: |
| 1359 | * Adds the square of the time of the event to the sum |
| 1360 | */ |
| 1361 | static void gfSumSquares(gpointer data, gpointer userData) |
| 1362 | { |
| 1363 | Event* event= (Event*) data; |
| 1364 | |
| 1365 | *(double*) userData+= pow(event->wallTime.seconds + event->wallTime.nanosec |
| 1366 | / 1e9, 2.); |
| 1367 | } |
| 1368 | |
| 1369 | |
| 1370 | /* |
| 1371 | * Update a struct Bins according to a new value |
| 1372 | * |
| 1373 | * Args: |
| 1374 | * bins: the structure containing bins to build a histrogram |
| 1375 | * value: the new value |
| 1376 | */ |
| 1377 | static void hitBin(struct Bins* const bins, const double value) |
| 1378 | { |
| 1379 | unsigned int binN= binNum(value); |
| 1380 | |
| 1381 | if (binN < bins->min) |
| 1382 | { |
| 1383 | bins->min= binN; |
| 1384 | } |
| 1385 | else if (binN > bins->max) |
| 1386 | { |
| 1387 | bins->max= binN; |
| 1388 | } |
| 1389 | |
| 1390 | bins->total++; |
| 1391 | |
| 1392 | bins->bin[binN]++; |
| 1393 | } |
| 1394 | |
| 1395 | |
| 1396 | /* |
| 1397 | * Figure out the bin in a histogram to which a value belongs. |
| 1398 | * |
| 1399 | * This uses exponentially sized bins that go from 0 to infinity. |
| 1400 | * |
| 1401 | * Args: |
| 1402 | * value: in the range -INFINITY to INFINITY |
| 1403 | * |
| 1404 | * Returns: |
| 1405 | * The number of the bin in a struct Bins.bin |
| 1406 | */ |
| 1407 | static unsigned int binNum(const double value) |
| 1408 | { |
| 1409 | if (value <= 0) |
| 1410 | { |
| 1411 | return 0; |
| 1412 | } |
| 1413 | else if (value < binEnd(1)) |
| 1414 | { |
| 1415 | return 1; |
| 1416 | } |
| 1417 | else if (value >= binStart(BIN_NB - 1)) |
| 1418 | { |
| 1419 | return BIN_NB - 1; |
| 1420 | } |
| 1421 | else |
| 1422 | { |
| 1423 | return floor(log(value) / log(binBase)) + BIN_NB + 1; |
| 1424 | } |
| 1425 | } |
| 1426 | |
| 1427 | |
| 1428 | /* |
| 1429 | * Figure out the start of the interval of a bin in a histogram. See struct |
| 1430 | * Bins. |
| 1431 | * |
| 1432 | * This uses exponentially sized bins that go from 0 to infinity. |
| 1433 | * |
| 1434 | * Args: |
| 1435 | * binNum: bin number |
| 1436 | * |
| 1437 | * Return: |
| 1438 | * The start of the interval, this value is included in the interval (except |
| 1439 | * for -INFINITY, naturally) |
| 1440 | */ |
| 1441 | static double binStart(const unsigned int binNum) |
| 1442 | { |
| 1443 | g_assert_cmpuint(binNum, <, BIN_NB); |
| 1444 | |
| 1445 | if (binNum == 0) |
| 1446 | { |
| 1447 | return -INFINITY; |
| 1448 | } |
| 1449 | else if (binNum == 1) |
| 1450 | { |
| 1451 | return 0.; |
| 1452 | } |
| 1453 | else |
| 1454 | { |
| 1455 | return pow(binBase, (double) binNum - BIN_NB + 1); |
| 1456 | } |
| 1457 | } |
| 1458 | |
| 1459 | |
| 1460 | /* |
| 1461 | * Figure out the end of the interval of a bin in a histogram. See struct |
| 1462 | * Bins. |
| 1463 | * |
| 1464 | * This uses exponentially sized bins that go from 0 to infinity. |
| 1465 | * |
| 1466 | * Args: |
| 1467 | * binNum: bin number |
| 1468 | * |
| 1469 | * Return: |
| 1470 | * The end of the interval, this value is not included in the interval |
| 1471 | */ |
| 1472 | static double binEnd(const unsigned int binNum) |
| 1473 | { |
| 1474 | g_assert_cmpuint(binNum, <, BIN_NB); |
| 1475 | |
| 1476 | if (binNum == 0) |
| 1477 | { |
| 1478 | return 0.; |
| 1479 | } |
| 1480 | else if (binNum < BIN_NB - 1) |
| 1481 | { |
| 1482 | return pow(binBase, (double) binNum - BIN_NB + 2); |
| 1483 | } |
| 1484 | else |
| 1485 | { |
| 1486 | return INFINITY; |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | |
| 1491 | /* |
| 1492 | * Return the total number of elements in the "normal" bins (not underflow or |
| 1493 | * overflow) |
| 1494 | * |
| 1495 | * Args: |
| 1496 | * bins: the structure containing bins to build a histrogram |
| 1497 | */ |
| 1498 | static uint32_t normalTotal(struct Bins* const bins) |
| 1499 | { |
| 1500 | return bins->total - bins->bin[0] - bins->bin[BIN_NB - 1]; |
| 1501 | } |
| 1502 | |
| 1503 | |
| 1504 | /* Update the bounds between two traces |
| 1505 | * |
| 1506 | * Args: |
| 1507 | * bounds: the array containing all the trace-pair bounds |
| 1508 | * e1, e2: the two related events |
| 1509 | */ |
| 1510 | static void updateBounds(Bounds** const bounds, Event* const e1, Event* const |
| 1511 | e2) |
| 1512 | { |
| 1513 | unsigned int traceI, traceJ; |
| 1514 | uint64_t messageTime; |
| 1515 | Bounds* tpBounds; |
| 1516 | |
| 1517 | if (e1->traceNum < e2->traceNum) |
| 1518 | { |
| 1519 | traceI= e2->traceNum; |
| 1520 | traceJ= e1->traceNum; |
| 1521 | messageTime= e1->cpuTime; |
| 1522 | } |
| 1523 | else |
| 1524 | { |
| 1525 | traceI= e1->traceNum; |
| 1526 | traceJ= e2->traceNum; |
| 1527 | messageTime= e2->cpuTime; |
| 1528 | } |
| 1529 | tpBounds= &bounds[traceI][traceJ]; |
| 1530 | |
| 1531 | if (messageTime < tpBounds->min) |
| 1532 | { |
| 1533 | tpBounds->min= messageTime; |
| 1534 | } |
| 1535 | if (messageTime > tpBounds->max) |
| 1536 | { |
| 1537 | tpBounds->max= messageTime; |
| 1538 | } |
| 1539 | } |
| 1540 | |
| 1541 | |
| 1542 | #ifdef HAVE_LIBGLPK |
| 1543 | /* |
| 1544 | * Create the linear programming problem containing the constraints defined by |
| 1545 | * two half-hulls. The objective function and optimization directions are not |
| 1546 | * written. |
| 1547 | * |
| 1548 | * Args: |
| 1549 | * syncState: container for synchronization data |
| 1550 | * i: first trace number |
| 1551 | * j: second trace number, garanteed to be larger than i |
| 1552 | * Returns: |
| 1553 | * A new glp_prob*, this problem must be freed by the caller with |
| 1554 | * glp_delete_prob() |
| 1555 | */ |
| 1556 | static glp_prob* lpCreateProblem(GQueue* const lowerHull, GQueue* const |
| 1557 | upperHull) |
| 1558 | { |
| 1559 | unsigned int it; |
| 1560 | const int zero= 0; |
| 1561 | const double zeroD= 0.; |
| 1562 | glp_prob* lp= glp_create_prob(); |
| 1563 | unsigned int hullPointNb= g_queue_get_length(lowerHull) + |
| 1564 | g_queue_get_length(upperHull); |
| 1565 | GArray* iArray= g_array_sized_new(FALSE, FALSE, sizeof(int), hullPointNb + |
| 1566 | 1); |
| 1567 | GArray* jArray= g_array_sized_new(FALSE, FALSE, sizeof(int), hullPointNb + |
| 1568 | 1); |
| 1569 | GArray* aArray= g_array_sized_new(FALSE, FALSE, sizeof(double), |
| 1570 | hullPointNb + 1); |
| 1571 | struct { |
| 1572 | GQueue* hull; |
| 1573 | struct LPAddRowInfo rowInfo; |
| 1574 | } loopValues[2]= { |
| 1575 | {lowerHull, {lp, GLP_UP, iArray, jArray, aArray}}, |
| 1576 | {upperHull, {lp, GLP_LO, iArray, jArray, aArray}}, |
| 1577 | }; |
| 1578 | |
| 1579 | // Create the LP problem |
| 1580 | glp_term_out(GLP_OFF); |
| 1581 | if (hullPointNb > 0) |
| 1582 | { |
| 1583 | glp_add_rows(lp, hullPointNb); |
| 1584 | } |
| 1585 | glp_add_cols(lp, 2); |
| 1586 | |
| 1587 | glp_set_col_name(lp, 1, "a0"); |
| 1588 | glp_set_col_bnds(lp, 1, GLP_FR, 0., 0.); |
| 1589 | glp_set_col_name(lp, 2, "a1"); |
| 1590 | glp_set_col_bnds(lp, 2, GLP_LO, 0., 0.); |
| 1591 | |
| 1592 | // Add row constraints |
| 1593 | g_array_append_val(iArray, zero); |
| 1594 | g_array_append_val(jArray, zero); |
| 1595 | g_array_append_val(aArray, zeroD); |
| 1596 | |
| 1597 | for (it= 0; it < sizeof(loopValues) / sizeof(*loopValues); it++) |
| 1598 | { |
| 1599 | g_queue_foreach(loopValues[it].hull, &gfLPAddRow, |
| 1600 | &loopValues[it].rowInfo); |
| 1601 | } |
| 1602 | |
| 1603 | g_assert_cmpuint(iArray->len, ==, jArray->len); |
| 1604 | g_assert_cmpuint(jArray->len, ==, aArray->len); |
| 1605 | g_assert_cmpuint(aArray->len - 1, ==, hullPointNb * 2); |
| 1606 | |
| 1607 | glp_load_matrix(lp, aArray->len - 1, &g_array_index(iArray, int, 0), |
| 1608 | &g_array_index(jArray, int, 0), &g_array_index(aArray, double, 0)); |
| 1609 | |
| 1610 | glp_scale_prob(lp, GLP_SF_AUTO); |
| 1611 | |
| 1612 | g_array_free(iArray, TRUE); |
| 1613 | g_array_free(jArray, TRUE); |
| 1614 | g_array_free(aArray, TRUE); |
| 1615 | |
| 1616 | return lp; |
| 1617 | } |
| 1618 | |
| 1619 | |
| 1620 | /* |
| 1621 | * A GFunc for g_queue_foreach(). Add constraints and bounds for one row. |
| 1622 | * |
| 1623 | * Args: |
| 1624 | * data Point*, synchronization point for which to add an LP row |
| 1625 | * (a constraint) |
| 1626 | * user_data LPAddRowInfo* |
| 1627 | */ |
| 1628 | static void gfLPAddRow(gpointer data, gpointer user_data) |
| 1629 | { |
| 1630 | Point* p= data; |
| 1631 | struct LPAddRowInfo* rowInfo= user_data; |
| 1632 | int indexes[2]; |
| 1633 | double constraints[2]; |
| 1634 | |
| 1635 | indexes[0]= g_array_index(rowInfo->iArray, int, rowInfo->iArray->len - 1) + 1; |
| 1636 | indexes[1]= indexes[0]; |
| 1637 | |
| 1638 | if (rowInfo->boundType == GLP_UP) |
| 1639 | { |
| 1640 | glp_set_row_bnds(rowInfo->lp, indexes[0], GLP_UP, 0., p->y); |
| 1641 | } |
| 1642 | else if (rowInfo->boundType == GLP_LO) |
| 1643 | { |
| 1644 | glp_set_row_bnds(rowInfo->lp, indexes[0], GLP_LO, p->y, 0.); |
| 1645 | } |
| 1646 | else |
| 1647 | { |
| 1648 | g_assert_not_reached(); |
| 1649 | } |
| 1650 | |
| 1651 | g_array_append_vals(rowInfo->iArray, indexes, 2); |
| 1652 | indexes[0]= 1; |
| 1653 | indexes[1]= 2; |
| 1654 | g_array_append_vals(rowInfo->jArray, indexes, 2); |
| 1655 | constraints[0]= 1.; |
| 1656 | constraints[1]= p->x; |
| 1657 | g_array_append_vals(rowInfo->aArray, constraints, 2); |
| 1658 | } |
| 1659 | |
| 1660 | |
| 1661 | /* |
| 1662 | * Calculate min or max correction factors (as possible) using an LP problem. |
| 1663 | * |
| 1664 | * Args: |
| 1665 | * lp: A linear programming problem with constraints and bounds |
| 1666 | * initialized. |
| 1667 | * direction: The type of factors desired. Use GLP_MAX for max |
| 1668 | * approximation factors (a1, the drift or slope is the |
| 1669 | * largest) and GLP_MIN in the other case. |
| 1670 | * |
| 1671 | * Returns: |
| 1672 | * If the calculation was successful, a new Factors struct. Otherwise, NULL. |
| 1673 | * The calculation will fail if the hull assumptions are not respected. |
| 1674 | */ |
| 1675 | static Factors* calculateFactors(glp_prob* const lp, const int direction) |
| 1676 | { |
| 1677 | int retval, status; |
| 1678 | Factors* factors; |
| 1679 | |
| 1680 | glp_set_obj_coef(lp, 1, 0.); |
| 1681 | glp_set_obj_coef(lp, 2, 1.); |
| 1682 | |
| 1683 | glp_set_obj_dir(lp, direction); |
| 1684 | retval= glp_simplex(lp, NULL); |
| 1685 | status= glp_get_status(lp); |
| 1686 | |
| 1687 | if (retval == 0 && status == GLP_OPT) |
| 1688 | { |
| 1689 | factors= malloc(sizeof(Factors)); |
| 1690 | factors->offset= glp_get_col_prim(lp, 1); |
| 1691 | factors->drift= glp_get_col_prim(lp, 2); |
| 1692 | } |
| 1693 | else |
| 1694 | { |
| 1695 | factors= NULL; |
| 1696 | } |
| 1697 | |
| 1698 | return factors; |
| 1699 | } |
| 1700 | |
| 1701 | |
| 1702 | /* |
| 1703 | * Calculate min, max and approx correction factors (as possible) using an LP |
| 1704 | * problem. |
| 1705 | * |
| 1706 | * Args: |
| 1707 | * lp: A linear programming problem with constraints and bounds |
| 1708 | * initialized. |
| 1709 | * |
| 1710 | * Returns: |
| 1711 | * Please note that the approximation type may be ACCURATE, INCOMPLETE or |
| 1712 | * ABSENT. Unlike in analysis_chull, ABSENT is also used when the hulls do |
| 1713 | * not respect assumptions. |
| 1714 | */ |
| 1715 | static void calculateCompleteFactors(glp_prob* const lp, PairFactors* factors) |
| 1716 | { |
| 1717 | factors->min= calculateFactors(lp, GLP_MIN); |
| 1718 | factors->max= calculateFactors(lp, GLP_MAX); |
| 1719 | |
| 1720 | if (factors->min && factors->max) |
| 1721 | { |
| 1722 | factors->type= ACCURATE; |
| 1723 | calculateFactorsMiddle(factors); |
| 1724 | } |
| 1725 | else if (factors->min || factors->max) |
| 1726 | { |
| 1727 | factors->type= INCOMPLETE; |
| 1728 | factors->approx= NULL; |
| 1729 | } |
| 1730 | else |
| 1731 | { |
| 1732 | factors->type= ABSENT; |
| 1733 | factors->approx= NULL; |
| 1734 | } |
| 1735 | } |
| 1736 | |
| 1737 | |
| 1738 | /* |
| 1739 | * A GFunc for g_queue_foreach() |
| 1740 | * |
| 1741 | * Args: |
| 1742 | * data Point*, a convex hull point |
| 1743 | * user_data GArray*, an array of convex hull point absisca values, as |
| 1744 | * double |
| 1745 | */ |
| 1746 | static void gfAddAbsiscaToArray(gpointer data, gpointer user_data) |
| 1747 | { |
| 1748 | Point* p= data; |
| 1749 | GArray* a= user_data; |
| 1750 | double v= p->x; |
| 1751 | |
| 1752 | g_array_append_val(a, v); |
| 1753 | } |
| 1754 | |
| 1755 | |
| 1756 | /* |
| 1757 | * A GCompareFunc for g_array_sort() |
| 1758 | * |
| 1759 | * Args: |
| 1760 | * a, b double*, absisca values |
| 1761 | * |
| 1762 | * Returns: |
| 1763 | * "returns less than zero for first arg is less than second arg, zero for |
| 1764 | * equal, greater zero if first arg is greater than second arg" |
| 1765 | * - the great glib documentation |
| 1766 | */ |
| 1767 | static gint gcfCompareDouble(gconstpointer a, gconstpointer b) |
| 1768 | { |
| 1769 | if (*(double*) a < *(double*) b) |
| 1770 | { |
| 1771 | return -1; |
| 1772 | } |
| 1773 | else if (*(double*) a > *(double*) b) |
| 1774 | { |
| 1775 | return 1; |
| 1776 | } |
| 1777 | else |
| 1778 | { |
| 1779 | return 0; |
| 1780 | } |
| 1781 | } |
| 1782 | #endif |
| 1783 | |
| 1784 | |
| 1785 | /* |
| 1786 | * Compute synchronization factors using a linear programming approach. |
| 1787 | * Compute the factors using analysis_chull. Compare the two. |
| 1788 | * |
| 1789 | * When the solver library, glpk, is not available at build time, only compute |
| 1790 | * the factors using analysis_chull. This is to make sure that module runs its |
| 1791 | * finalize function so that its graph functions can be called later. |
| 1792 | * |
| 1793 | * Args: |
| 1794 | * syncState: container for synchronization data |
| 1795 | */ |
| 1796 | static void finalizeAnalysisEvalLP(SyncState* const syncState) |
| 1797 | { |
| 1798 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 1799 | #ifdef HAVE_LIBGLPK |
| 1800 | unsigned int i, j; |
| 1801 | AnalysisDataCHull* chAnalysisData= analysisData->chullSS->analysisData; |
| 1802 | AllFactors* lpFactorsArray; |
| 1803 | |
| 1804 | if (!syncState->stats && !syncState->graphsStream) |
| 1805 | { |
| 1806 | return; |
| 1807 | } |
| 1808 | |
| 1809 | /* Because of matching_distributor, this analysis may be called twice. |
| 1810 | * Only run it once */ |
| 1811 | if ((syncState->graphsStream && analysisData->graphs->lps != NULL) || |
| 1812 | (syncState->stats && analysisData->stats->chFactorsArray != NULL)) |
| 1813 | { |
| 1814 | return; |
| 1815 | } |
| 1816 | |
| 1817 | lpFactorsArray= createAllFactors(syncState->traceNb); |
| 1818 | |
| 1819 | if (syncState->stats) |
| 1820 | { |
| 1821 | analysisData->stats->chFactorsArray= |
| 1822 | calculateAllFactors(analysisData->chullSS); |
| 1823 | analysisData->stats->lpFactorsArray= lpFactorsArray; |
| 1824 | } |
| 1825 | |
| 1826 | if (syncState->graphsStream) |
| 1827 | { |
| 1828 | analysisData->graphs->lps= malloc(syncState->traceNb * |
| 1829 | sizeof(glp_prob**)); |
| 1830 | for (i= 0; i < syncState->traceNb; i++) |
| 1831 | { |
| 1832 | analysisData->graphs->lps[i]= malloc(i * sizeof(glp_prob*)); |
| 1833 | } |
| 1834 | analysisData->graphs->lpFactorsArray= lpFactorsArray; |
| 1835 | } |
| 1836 | |
| 1837 | for (i= 0; i < syncState->traceNb; i++) |
| 1838 | { |
| 1839 | for (j= 0; j < i; j++) |
| 1840 | { |
| 1841 | glp_prob* lp; |
| 1842 | |
| 1843 | // Create the LP problem |
| 1844 | lp= lpCreateProblem(chAnalysisData->hullArray[i][j], |
| 1845 | chAnalysisData->hullArray[j][i]); |
| 1846 | |
| 1847 | // Use the LP problem to find the correction factors for this pair of |
| 1848 | // traces |
| 1849 | calculateCompleteFactors(lp, &lpFactorsArray->pairFactors[i][j]); |
| 1850 | |
| 1851 | if (syncState->graphsStream) |
| 1852 | { |
| 1853 | analysisData->graphs->lps[i][j]= lp; |
| 1854 | } |
| 1855 | else |
| 1856 | { |
| 1857 | glp_delete_prob(lp); |
| 1858 | } |
| 1859 | } |
| 1860 | } |
| 1861 | #endif |
| 1862 | |
| 1863 | freeAllFactors(analysisData->chullSS->analysisModule->finalizeAnalysis(analysisData->chullSS), |
| 1864 | analysisData->chullSS->traceNb); |
| 1865 | } |
| 1866 | |
| 1867 | |
| 1868 | /* |
| 1869 | * Compute synchronization accuracy information using a linear programming |
| 1870 | * approach. Write the neccessary data files and plot lines in the gnuplot |
| 1871 | * script. |
| 1872 | * |
| 1873 | * When the solver library, glpk, is not available at build time nothing is |
| 1874 | * actually produced. |
| 1875 | * |
| 1876 | * Args: |
| 1877 | * syncState: container for synchronization data |
| 1878 | * i: first trace number |
| 1879 | * j: second trace number, garanteed to be larger than i |
| 1880 | */ |
| 1881 | static void writeAnalysisTraceTimeBackPlotsEval(SyncState* const syncState, |
| 1882 | const unsigned int i, const unsigned int j) |
| 1883 | { |
| 1884 | #ifdef HAVE_LIBGLPK |
| 1885 | unsigned int it; |
| 1886 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 1887 | AnalysisGraphsEval* graphs= analysisData->graphs; |
| 1888 | GQueue*** hullArray= ((AnalysisDataCHull*) |
| 1889 | analysisData->chullSS->analysisData)->hullArray; |
| 1890 | PairFactors* lpFactors= &graphs->lpFactorsArray->pairFactors[j][i]; |
| 1891 | glp_prob* lp= graphs->lps[j][i]; |
| 1892 | |
| 1893 | if (lpFactors->type == ACCURATE) |
| 1894 | { |
| 1895 | int retval; |
| 1896 | char* cwd; |
| 1897 | char fileName[40]; |
| 1898 | FILE* fp; |
| 1899 | GArray* xValues; |
| 1900 | |
| 1901 | // Open the data file |
| 1902 | snprintf(fileName, 40, "analysis_eval_accuracy-%03u_and_%03u.data", i, j); |
| 1903 | fileName[sizeof(fileName) - 1]= '\0'; |
| 1904 | |
| 1905 | cwd= changeToGraphsDir(syncState->graphsDir); |
| 1906 | |
| 1907 | if ((fp= fopen(fileName, "w")) == NULL) |
| 1908 | { |
| 1909 | g_error(strerror(errno)); |
| 1910 | } |
| 1911 | fprintf(fp, "#%-24s %-25s %-25s %-25s\n", "x", "middle", "min", "max"); |
| 1912 | |
| 1913 | retval= chdir(cwd); |
| 1914 | if (retval == -1) |
| 1915 | { |
| 1916 | g_error(strerror(errno)); |
| 1917 | } |
| 1918 | free(cwd); |
| 1919 | |
| 1920 | // Build the list of absisca values for the points in the accuracy graph |
| 1921 | xValues= g_array_sized_new(FALSE, FALSE, sizeof(double), |
| 1922 | g_queue_get_length(hullArray[i][j]) + |
| 1923 | g_queue_get_length(hullArray[j][i])); |
| 1924 | |
| 1925 | g_queue_foreach(hullArray[i][j], &gfAddAbsiscaToArray, xValues); |
| 1926 | g_queue_foreach(hullArray[j][i], &gfAddAbsiscaToArray, xValues); |
| 1927 | |
| 1928 | g_array_sort(xValues, &gcfCompareDouble); |
| 1929 | |
| 1930 | /* For each absisca value and each optimisation direction, solve the LP |
| 1931 | * and write a line in the data file */ |
| 1932 | for (it= 0; it < xValues->len; it++) |
| 1933 | { |
| 1934 | unsigned int it2; |
| 1935 | int directions[]= {GLP_MIN, GLP_MAX}; |
| 1936 | glp_set_obj_coef(lp, 1, 1.); |
| 1937 | glp_set_obj_coef(lp, 2, g_array_index(xValues, double, it)); |
| 1938 | |
| 1939 | fprintf(fp, "%25.9f %25.9f", g_array_index(xValues, double, it), |
| 1940 | lpFactors->approx->offset + lpFactors->approx->drift * |
| 1941 | g_array_index(xValues, double, it)); |
| 1942 | for (it2= 0; it2 < sizeof(directions) / sizeof(*directions); it2++) |
| 1943 | { |
| 1944 | int status; |
| 1945 | |
| 1946 | glp_set_obj_dir(lp, directions[it2]); |
| 1947 | retval= glp_simplex(lp, NULL); |
| 1948 | status= glp_get_status(lp); |
| 1949 | |
| 1950 | g_assert(retval == 0 && status == GLP_OPT); |
| 1951 | fprintf(fp, " %25.9f", glp_get_obj_val(lp)); |
| 1952 | } |
| 1953 | fprintf(fp, "\n"); |
| 1954 | } |
| 1955 | |
| 1956 | g_array_free(xValues, TRUE); |
| 1957 | fclose(fp); |
| 1958 | |
| 1959 | fprintf(syncState->graphsStream, |
| 1960 | "\t\"analysis_eval_accuracy-%1$03u_and_%2$03u.data\" " |
| 1961 | "using 1:(($3 - $2) / clock_freq_%2$u):(($4 - $2) / clock_freq_%2$u) " |
| 1962 | "title \"Synchronization accuracy\" " |
| 1963 | "with filledcurves linewidth 2 linetype 1 " |
| 1964 | "linecolor rgb \"black\" fill solid 0.25 noborder, \\\n", i, |
| 1965 | j); |
| 1966 | } |
| 1967 | #endif |
| 1968 | } |
| 1969 | |
| 1970 | |
| 1971 | /* |
| 1972 | * Write the analysis-specific graph lines in the gnuplot script. |
| 1973 | * |
| 1974 | * When the solver library, glpk, is not available at build time nothing is |
| 1975 | * actually produced. |
| 1976 | * |
| 1977 | * Args: |
| 1978 | * syncState: container for synchronization data |
| 1979 | * i: first trace number |
| 1980 | * j: second trace number, garanteed to be larger than i |
| 1981 | */ |
| 1982 | static void writeAnalysisTraceTimeForePlotsEval(SyncState* const syncState, |
| 1983 | const unsigned int i, const unsigned int j) |
| 1984 | { |
| 1985 | #ifdef HAVE_LIBGLPK |
| 1986 | if (((AnalysisDataEval*) |
| 1987 | syncState->analysisData)->graphs->lpFactorsArray->pairFactors[j][i].type |
| 1988 | == ACCURATE) |
| 1989 | { |
| 1990 | fprintf(syncState->graphsStream, |
| 1991 | "\t\"analysis_eval_accuracy-%1$03u_and_%2$03u.data\" " |
| 1992 | "using 1:(($3 - $2) / clock_freq_%2$u) notitle " |
| 1993 | "with lines linewidth 2 linetype 1 " |
| 1994 | "linecolor rgb \"gray60\", \\\n" |
| 1995 | "\t\"analysis_eval_accuracy-%1$03u_and_%2$03u.data\" " |
| 1996 | "using 1:(($4 - $2) / clock_freq_%2$u) notitle " |
| 1997 | "with lines linewidth 2 linetype 1 " |
| 1998 | "linecolor rgb \"gray60\", \\\n", i, j); |
| 1999 | } |
| 2000 | #endif |
| 2001 | } |
| 2002 | |
| 2003 | |
| 2004 | /* |
| 2005 | * Write the analysis-specific graph lines in the gnuplot script. |
| 2006 | * |
| 2007 | * Args: |
| 2008 | * syncState: container for synchronization data |
| 2009 | * i: first trace number |
| 2010 | * j: second trace number, garanteed to be larger than i |
| 2011 | */ |
| 2012 | static void writeAnalysisTraceTraceBackPlotsEval(SyncState* const syncState, |
| 2013 | const unsigned int i, const unsigned int j) |
| 2014 | { |
| 2015 | #ifdef HAVE_LIBGLPK |
| 2016 | fprintf(syncState->graphsStream, |
| 2017 | "\t\"analysis_eval_accuracy-%1$03u_and_%2$03u.data\" " |
| 2018 | "using 1:3:4 " |
| 2019 | "title \"Synchronization accuracy\" " |
| 2020 | "with filledcurves linewidth 2 linetype 1 " |
| 2021 | "linecolor rgb \"black\" fill solid 0.25 noborder, \\\n", i, j); |
| 2022 | #endif |
| 2023 | } |
| 2024 | |
| 2025 | |
| 2026 | /* |
| 2027 | * Write the analysis-specific graph lines in the gnuplot script. |
| 2028 | * |
| 2029 | * Args: |
| 2030 | * syncState: container for synchronization data |
| 2031 | * i: first trace number |
| 2032 | * j: second trace number, garanteed to be larger than i |
| 2033 | */ |
| 2034 | static void writeAnalysisTraceTraceForePlotsEval(SyncState* const syncState, |
| 2035 | const unsigned int i, const unsigned int j) |
| 2036 | { |
| 2037 | AnalysisDataEval* analysisData= syncState->analysisData; |
| 2038 | |
| 2039 | analysisData->chullSS->analysisModule->graphFunctions.writeTraceTraceForePlots(analysisData->chullSS, |
| 2040 | i, j); |
| 2041 | } |