| 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 | #ifdef HAVE_CONFIG_H |
| 19 | #include <config.h> |
| 20 | #endif |
| 21 | |
| 22 | #include <errno.h> |
| 23 | #include <inttypes.h> |
| 24 | #include <stdlib.h> |
| 25 | #include <string.h> |
| 26 | #include <unistd.h> |
| 27 | |
| 28 | #include "event_analysis.h" |
| 29 | #include "sync_chain.h" |
| 30 | |
| 31 | #include "event_matching_tcp.h" |
| 32 | |
| 33 | |
| 34 | // Functions common to all matching modules |
| 35 | static void initMatchingTCP(SyncState* const syncState); |
| 36 | static void destroyMatchingTCP(SyncState* const syncState); |
| 37 | |
| 38 | static void matchEventTCP(SyncState* const syncState, Event* const event); |
| 39 | static AllFactors* finalizeMatchingTCP(SyncState* const syncState); |
| 40 | static void printMatchingStatsTCP(SyncState* const syncState); |
| 41 | static void writeMatchingGraphsPlotsTCPMessages(SyncState* const syncState, |
| 42 | const unsigned int i, const unsigned int j); |
| 43 | |
| 44 | // Functions specific to this module |
| 45 | static void matchEvents(SyncState* const syncState, Event* const event, |
| 46 | GHashTable* const unMatchedList, GHashTable* const |
| 47 | unMatchedOppositeList, const size_t fieldOffset, const size_t |
| 48 | oppositeFieldOffset); |
| 49 | static void partialDestroyMatchingTCP(SyncState* const syncState); |
| 50 | |
| 51 | static bool isAck(const Message* const message); |
| 52 | static bool needsAck(const Message* const message); |
| 53 | static void buildReversedConnectionKey(ConnectionKey* const |
| 54 | reversedConnectionKey, const ConnectionKey* const connectionKey); |
| 55 | |
| 56 | static void openGraphDataFiles(SyncState* const syncState); |
| 57 | static void closeGraphDataFiles(SyncState* const syncState); |
| 58 | static void writeMessagePoint(FILE* stream, const Message* const message); |
| 59 | |
| 60 | |
| 61 | static MatchingModule matchingModuleTCP = { |
| 62 | .name= "TCP", |
| 63 | .canMatch[TCP]= true, |
| 64 | .canMatch[UDP]= false, |
| 65 | .initMatching= &initMatchingTCP, |
| 66 | .destroyMatching= &destroyMatchingTCP, |
| 67 | .matchEvent= &matchEventTCP, |
| 68 | .finalizeMatching= &finalizeMatchingTCP, |
| 69 | .printMatchingStats= &printMatchingStatsTCP, |
| 70 | .graphFunctions= { |
| 71 | .writeTraceTraceForePlots= &writeMatchingGraphsPlotsTCPMessages, |
| 72 | } |
| 73 | }; |
| 74 | |
| 75 | |
| 76 | /* |
| 77 | * Matching module registering function |
| 78 | */ |
| 79 | void registerMatchingTCP() |
| 80 | { |
| 81 | g_queue_push_tail(&matchingModules, &matchingModuleTCP); |
| 82 | } |
| 83 | |
| 84 | |
| 85 | /* |
| 86 | * Matching init function |
| 87 | * |
| 88 | * This function is called at the beginning of a synchronization run for a set |
| 89 | * of traces. |
| 90 | * |
| 91 | * Allocate the matching specific data structures |
| 92 | * |
| 93 | * Args: |
| 94 | * syncState container for synchronization data. |
| 95 | * This function allocates these matchingData members: |
| 96 | * unMatchedInE |
| 97 | * unMatchedOutE |
| 98 | * unAcked |
| 99 | * stats |
| 100 | */ |
| 101 | static void initMatchingTCP(SyncState* const syncState) |
| 102 | { |
| 103 | MatchingDataTCP* matchingData; |
| 104 | |
| 105 | matchingData= malloc(sizeof(MatchingDataTCP)); |
| 106 | syncState->matchingData= matchingData; |
| 107 | |
| 108 | matchingData->unMatchedInE= g_hash_table_new_full(&ghfSegmentKeyHash, |
| 109 | &gefSegmentKeyEqual, NULL, &gdnDestroyEvent); |
| 110 | matchingData->unMatchedOutE= g_hash_table_new_full(&ghfSegmentKeyHash, |
| 111 | &gefSegmentKeyEqual, NULL, &gdnDestroyEvent); |
| 112 | matchingData->unAcked= g_hash_table_new_full(&ghfConnectionKeyHash, |
| 113 | &gefConnectionKeyEqual, &gdnConnectionKeyDestroy, |
| 114 | &gdnTCPSegmentListDestroy); |
| 115 | |
| 116 | if (syncState->stats) |
| 117 | { |
| 118 | unsigned int i; |
| 119 | |
| 120 | matchingData->stats= calloc(1, sizeof(MatchingStatsTCP)); |
| 121 | matchingData->stats->totMessageArray= malloc(syncState->traceNb * |
| 122 | sizeof(unsigned int*)); |
| 123 | for (i= 0; i < syncState->traceNb; i++) |
| 124 | { |
| 125 | matchingData->stats->totMessageArray[i]= |
| 126 | calloc(syncState->traceNb, sizeof(unsigned int)); |
| 127 | } |
| 128 | } |
| 129 | else |
| 130 | { |
| 131 | matchingData->stats= NULL; |
| 132 | } |
| 133 | |
| 134 | if (syncState->graphsStream) |
| 135 | { |
| 136 | openGraphDataFiles(syncState); |
| 137 | } |
| 138 | else |
| 139 | { |
| 140 | matchingData->messagePoints= NULL; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | |
| 145 | /* |
| 146 | * Matching destroy function |
| 147 | * |
| 148 | * Free the matching specific data structures |
| 149 | * |
| 150 | * Args: |
| 151 | * syncState container for synchronization data. |
| 152 | * This function deallocates these matchingData members: |
| 153 | * stats |
| 154 | */ |
| 155 | static void destroyMatchingTCP(SyncState* const syncState) |
| 156 | { |
| 157 | MatchingDataTCP* matchingData; |
| 158 | |
| 159 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 160 | |
| 161 | if (matchingData == NULL) |
| 162 | { |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | partialDestroyMatchingTCP(syncState); |
| 167 | |
| 168 | if (syncState->stats) |
| 169 | { |
| 170 | unsigned int i; |
| 171 | |
| 172 | for (i= 0; i < syncState->traceNb; i++) |
| 173 | { |
| 174 | free(matchingData->stats->totMessageArray[i]); |
| 175 | } |
| 176 | free(matchingData->stats->totMessageArray); |
| 177 | free(matchingData->stats); |
| 178 | } |
| 179 | |
| 180 | free(syncState->matchingData); |
| 181 | syncState->matchingData= NULL; |
| 182 | } |
| 183 | |
| 184 | |
| 185 | /* |
| 186 | * Free some of the matching specific data structures |
| 187 | * |
| 188 | * This function can be called right after the events have been processed to |
| 189 | * free some data structures that are not needed for finalization. |
| 190 | * |
| 191 | * Args: |
| 192 | * syncState container for synchronization data. |
| 193 | * This function deallocates these matchingData members: |
| 194 | * unMatchedInE |
| 195 | * unMatchedOut |
| 196 | * unAcked |
| 197 | */ |
| 198 | static void partialDestroyMatchingTCP(SyncState* const syncState) |
| 199 | { |
| 200 | MatchingDataTCP* matchingData; |
| 201 | |
| 202 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 203 | |
| 204 | if (matchingData == NULL || matchingData->unMatchedInE == NULL) |
| 205 | { |
| 206 | return; |
| 207 | } |
| 208 | |
| 209 | g_hash_table_destroy(matchingData->unMatchedInE); |
| 210 | matchingData->unMatchedInE= NULL; |
| 211 | g_hash_table_destroy(matchingData->unMatchedOutE); |
| 212 | g_hash_table_destroy(matchingData->unAcked); |
| 213 | |
| 214 | if (syncState->graphsStream && matchingData->messagePoints) |
| 215 | { |
| 216 | closeGraphDataFiles(syncState); |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | |
| 221 | /* |
| 222 | * Try to match one event from a trace with the corresponding event from |
| 223 | * another trace. |
| 224 | * |
| 225 | * Args: |
| 226 | * syncState container for synchronization data. |
| 227 | * event new event to match |
| 228 | */ |
| 229 | static void matchEventTCP(SyncState* const syncState, Event* const event) |
| 230 | { |
| 231 | MatchingDataTCP* matchingData; |
| 232 | |
| 233 | g_assert(event->type == TCP); |
| 234 | |
| 235 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 236 | |
| 237 | if (event->event.tcpEvent->direction == IN) |
| 238 | { |
| 239 | matchEvents(syncState, event, matchingData->unMatchedInE, |
| 240 | matchingData->unMatchedOutE, offsetof(Message, inE), |
| 241 | offsetof(Message, outE)); |
| 242 | } |
| 243 | else |
| 244 | { |
| 245 | matchEvents(syncState, event, matchingData->unMatchedOutE, |
| 246 | matchingData->unMatchedInE, offsetof(Message, outE), |
| 247 | offsetof(Message, inE)); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | |
| 252 | /* |
| 253 | * Call the partial matching destroyer and obtain the factors from downstream |
| 254 | * |
| 255 | * Args: |
| 256 | * syncState container for synchronization data. |
| 257 | * |
| 258 | * Returns: |
| 259 | * AllFactors* synchronization factors for each trace pair |
| 260 | */ |
| 261 | static AllFactors* finalizeMatchingTCP(SyncState* const syncState) |
| 262 | { |
| 263 | partialDestroyMatchingTCP(syncState); |
| 264 | |
| 265 | return syncState->analysisModule->finalizeAnalysis(syncState); |
| 266 | } |
| 267 | |
| 268 | |
| 269 | /* |
| 270 | * Print statistics related to matching. Must be called after |
| 271 | * finalizeMatching. |
| 272 | * |
| 273 | * Args: |
| 274 | * syncState container for synchronization data. |
| 275 | */ |
| 276 | static void printMatchingStatsTCP(SyncState* const syncState) |
| 277 | { |
| 278 | unsigned int i, j; |
| 279 | MatchingDataTCP* matchingData; |
| 280 | |
| 281 | if (!syncState->stats) |
| 282 | { |
| 283 | return; |
| 284 | } |
| 285 | |
| 286 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 287 | |
| 288 | printf("TCP matching stats:\n"); |
| 289 | printf("\ttotal input and output events matched together to form a packet: %u\n", |
| 290 | matchingData->stats->totPacket); |
| 291 | |
| 292 | printf("\tMessage traffic:\n"); |
| 293 | |
| 294 | for (i= 0; i < syncState->traceNb; i++) |
| 295 | { |
| 296 | for (j= i + 1; j < syncState->traceNb; j++) |
| 297 | { |
| 298 | printf("\t\t%3d - %-3d: sent %-10u received %-10u\n", i, j, |
| 299 | matchingData->stats->totMessageArray[j][i], |
| 300 | matchingData->stats->totMessageArray[i][j]); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | if (syncState->analysisModule->analyzeExchange != NULL) |
| 305 | { |
| 306 | printf("\ttotal packets identified needing an acknowledge: %u\n", |
| 307 | matchingData->stats->totPacketNeedAck); |
| 308 | printf("\ttotal exchanges (four events matched together): %u\n", |
| 309 | matchingData->stats->totExchangeEffective); |
| 310 | printf("\ttotal synchronization exchanges: %u\n", |
| 311 | matchingData->stats->totExchangeSync); |
| 312 | } |
| 313 | } |
| 314 | |
| 315 | |
| 316 | /* |
| 317 | * Implementation of a packet matching algorithm for TCP |
| 318 | * |
| 319 | * Args: |
| 320 | * event: new event to match |
| 321 | * unMatchedList: list of unmatched events of the same type (send or |
| 322 | * receive) as event |
| 323 | * unMatchedOppositeList: list of unmatched events of the opposite type of |
| 324 | * event |
| 325 | * fieldOffset: offset of the Event field in the Message struct for the |
| 326 | * field of the type of event |
| 327 | * oppositeFieldOffset: offset of the Event field in the Message struct |
| 328 | * for the field of the opposite type of event |
| 329 | */ |
| 330 | static void matchEvents(SyncState* const syncState, Event* const event, |
| 331 | GHashTable* const unMatchedList, GHashTable* const unMatchedOppositeList, |
| 332 | const size_t fieldOffset, const size_t oppositeFieldOffset) |
| 333 | { |
| 334 | Event* companionEvent; |
| 335 | Message* packet; |
| 336 | MatchingDataTCP* matchingData; |
| 337 | GQueue* conUnAcked; |
| 338 | |
| 339 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 340 | |
| 341 | companionEvent= g_hash_table_lookup(unMatchedOppositeList, event->event.tcpEvent->segmentKey); |
| 342 | if (companionEvent != NULL) |
| 343 | { |
| 344 | g_debug("Found matching companion event, "); |
| 345 | |
| 346 | // If it's there, remove it and create a Message |
| 347 | g_hash_table_steal(unMatchedOppositeList, event->event.tcpEvent->segmentKey); |
| 348 | packet= malloc(sizeof(Message)); |
| 349 | *((Event**) ((void*) packet + fieldOffset))= event; |
| 350 | *((Event**) ((void*) packet + oppositeFieldOffset))= companionEvent; |
| 351 | packet->print= &printTCPSegment; |
| 352 | // Both events can now share the same segmentKey |
| 353 | free(packet->outE->event.tcpEvent->segmentKey); |
| 354 | packet->outE->event.tcpEvent->segmentKey= packet->inE->event.tcpEvent->segmentKey; |
| 355 | |
| 356 | if (syncState->stats) |
| 357 | { |
| 358 | matchingData->stats->totPacket++; |
| 359 | matchingData->stats->totMessageArray[packet->inE->traceNum][packet->outE->traceNum]++; |
| 360 | } |
| 361 | |
| 362 | // Discard loopback traffic |
| 363 | if (packet->inE->traceNum == packet->outE->traceNum) |
| 364 | { |
| 365 | destroyTCPSegment(packet); |
| 366 | return; |
| 367 | } |
| 368 | |
| 369 | if (syncState->graphsStream) |
| 370 | { |
| 371 | writeMessagePoint(matchingData->messagePoints[packet->inE->traceNum][packet->outE->traceNum], |
| 372 | packet); |
| 373 | } |
| 374 | |
| 375 | if (syncState->analysisModule->analyzeMessage != NULL) |
| 376 | { |
| 377 | syncState->analysisModule->analyzeMessage(syncState, packet); |
| 378 | } |
| 379 | |
| 380 | // We can skip the rest of the algorithm if the analysis module is not |
| 381 | // interested in exchanges |
| 382 | if (syncState->analysisModule->analyzeExchange == NULL) |
| 383 | { |
| 384 | destroyTCPSegment(packet); |
| 385 | return; |
| 386 | } |
| 387 | |
| 388 | // If this packet acknowleges some data ... |
| 389 | if (isAck(packet)) |
| 390 | { |
| 391 | ConnectionKey oppositeConnectionKey; |
| 392 | |
| 393 | buildReversedConnectionKey(&oppositeConnectionKey, |
| 394 | &event->event.tcpEvent->segmentKey->connectionKey); |
| 395 | conUnAcked= g_hash_table_lookup(matchingData->unAcked, |
| 396 | &oppositeConnectionKey); |
| 397 | if (conUnAcked != NULL) |
| 398 | { |
| 399 | Message* ackedPacket; |
| 400 | GList* result; |
| 401 | Exchange* exchange; |
| 402 | |
| 403 | exchange= NULL; |
| 404 | |
| 405 | result= g_queue_find_custom(conUnAcked, packet, &gcfTCPSegmentAckCompare); |
| 406 | |
| 407 | while (result != NULL) |
| 408 | { |
| 409 | // Remove the acknowledged packet from the unAcked list |
| 410 | // and keep it for later offset calculations |
| 411 | g_debug("Found matching unAcked packet, "); |
| 412 | |
| 413 | ackedPacket= (Message*) result->data; |
| 414 | g_queue_delete_link(conUnAcked, result); |
| 415 | |
| 416 | if (syncState->stats) |
| 417 | { |
| 418 | matchingData->stats->totExchangeEffective++; |
| 419 | } |
| 420 | |
| 421 | if (exchange == NULL) |
| 422 | { |
| 423 | exchange= malloc(sizeof(Exchange)); |
| 424 | exchange->message= packet; |
| 425 | exchange->acks= g_queue_new(); |
| 426 | } |
| 427 | |
| 428 | g_queue_push_tail(exchange->acks, ackedPacket); |
| 429 | |
| 430 | result= g_queue_find_custom(conUnAcked, packet, |
| 431 | &gcfTCPSegmentAckCompare); |
| 432 | } |
| 433 | |
| 434 | // It might be possible to do an offset calculation |
| 435 | if (exchange != NULL) |
| 436 | { |
| 437 | ackedPacket= g_queue_peek_tail(exchange->acks); |
| 438 | if (ackedPacket->outE->traceNum != packet->inE->traceNum |
| 439 | || ackedPacket->inE->traceNum != |
| 440 | packet->outE->traceNum || packet->inE->traceNum == |
| 441 | packet->outE->traceNum) |
| 442 | { |
| 443 | ackedPacket->print(ackedPacket); |
| 444 | packet->print(packet); |
| 445 | g_error("Disorganized exchange encountered during " |
| 446 | "synchronization"); |
| 447 | } |
| 448 | else |
| 449 | { |
| 450 | if (syncState->stats) |
| 451 | { |
| 452 | matchingData->stats->totExchangeSync++; |
| 453 | } |
| 454 | |
| 455 | syncState->analysisModule->analyzeExchange(syncState, |
| 456 | exchange); |
| 457 | } |
| 458 | |
| 459 | exchange->message= NULL; |
| 460 | destroyTCPExchange(exchange); |
| 461 | } |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | if (needsAck(packet)) |
| 466 | { |
| 467 | if (syncState->stats) |
| 468 | { |
| 469 | matchingData->stats->totPacketNeedAck++; |
| 470 | } |
| 471 | |
| 472 | // If this packet will generate an ack, add it to the unAcked list |
| 473 | g_debug("Adding to unAcked, "); |
| 474 | conUnAcked= g_hash_table_lookup(matchingData->unAcked, |
| 475 | &event->event.tcpEvent->segmentKey->connectionKey); |
| 476 | if (conUnAcked == NULL) |
| 477 | { |
| 478 | ConnectionKey* connectionKey; |
| 479 | |
| 480 | connectionKey= malloc(sizeof(ConnectionKey)); |
| 481 | memcpy(connectionKey, &event->event.tcpEvent->segmentKey->connectionKey, |
| 482 | sizeof(ConnectionKey)); |
| 483 | g_hash_table_insert(matchingData->unAcked, connectionKey, |
| 484 | conUnAcked= g_queue_new()); |
| 485 | } |
| 486 | g_queue_push_tail(conUnAcked, packet); |
| 487 | } |
| 488 | else |
| 489 | { |
| 490 | destroyTCPSegment(packet); |
| 491 | } |
| 492 | } |
| 493 | else |
| 494 | { |
| 495 | // If there's no corresponding event, add the event to the unmatched |
| 496 | // list for this type of event |
| 497 | g_debug("Adding to unmatched event list, "); |
| 498 | g_hash_table_replace(unMatchedList, event->event.tcpEvent->segmentKey, event); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | |
| 503 | /* |
| 504 | * Check if a packet is an acknowledge |
| 505 | * |
| 506 | * Args: |
| 507 | * packet TCP Message |
| 508 | * |
| 509 | * Returns: |
| 510 | * true if it is, |
| 511 | * false otherwise |
| 512 | */ |
| 513 | static bool isAck(const Message* const packet) |
| 514 | { |
| 515 | if (packet->inE->event.tcpEvent->segmentKey->ack == 1) |
| 516 | { |
| 517 | return true; |
| 518 | } |
| 519 | else |
| 520 | { |
| 521 | return false; |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | |
| 526 | /* |
| 527 | * Check if a packet will increment the sequence number, thus needing an |
| 528 | * acknowledge |
| 529 | * |
| 530 | * Args: |
| 531 | * packet TCP Message |
| 532 | * |
| 533 | * Returns: |
| 534 | * true if the packet will need an acknowledge |
| 535 | * false otherwise |
| 536 | */ |
| 537 | static bool needsAck(const Message* const packet) |
| 538 | { |
| 539 | if (packet->inE->event.tcpEvent->segmentKey->syn || packet->inE->event.tcpEvent->segmentKey->fin || |
| 540 | packet->inE->event.tcpEvent->segmentKey->tot_len - packet->inE->event.tcpEvent->segmentKey->ihl * 4 - |
| 541 | packet->inE->event.tcpEvent->segmentKey->doff * 4 > 0) |
| 542 | { |
| 543 | return true; |
| 544 | } |
| 545 | else |
| 546 | { |
| 547 | return false; |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | |
| 552 | /* |
| 553 | * Populate a connection key structure for the opposite direction of a |
| 554 | * connection |
| 555 | * |
| 556 | * Args: |
| 557 | * reversedConnectionKey the result, must be pre-allocated |
| 558 | * connectionKey the connection key to reverse |
| 559 | */ |
| 560 | static void buildReversedConnectionKey(ConnectionKey* const |
| 561 | reversedConnectionKey, const ConnectionKey* const connectionKey) |
| 562 | { |
| 563 | reversedConnectionKey->saddr= connectionKey->daddr; |
| 564 | reversedConnectionKey->daddr= connectionKey->saddr; |
| 565 | reversedConnectionKey->source= connectionKey->dest; |
| 566 | reversedConnectionKey->dest= connectionKey->source; |
| 567 | } |
| 568 | |
| 569 | |
| 570 | /* |
| 571 | * Create and open files used to store message points to genereate |
| 572 | * graphs. Allocate and populate array to store file pointers. |
| 573 | * |
| 574 | * Args: |
| 575 | * syncState: container for synchronization data |
| 576 | */ |
| 577 | static void openGraphDataFiles(SyncState* const syncState) |
| 578 | { |
| 579 | unsigned int i, j; |
| 580 | int retval; |
| 581 | char* cwd; |
| 582 | char name[29]; |
| 583 | MatchingDataTCP* matchingData; |
| 584 | |
| 585 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 586 | |
| 587 | cwd= changeToGraphsDir(syncState->graphsDir); |
| 588 | |
| 589 | matchingData->messagePoints= malloc(syncState->traceNb * sizeof(FILE**)); |
| 590 | for (i= 0; i < syncState->traceNb; i++) |
| 591 | { |
| 592 | matchingData->messagePoints[i]= malloc(syncState->traceNb * |
| 593 | sizeof(FILE*)); |
| 594 | for (j= 0; j < syncState->traceNb; j++) |
| 595 | { |
| 596 | if (i != j) |
| 597 | { |
| 598 | retval= snprintf(name, sizeof(name), |
| 599 | "matching_tcp-%03u_to_%03u.data", j, i); |
| 600 | if (retval > sizeof(name) - 1) |
| 601 | { |
| 602 | name[sizeof(name) - 1]= '\0'; |
| 603 | } |
| 604 | if ((matchingData->messagePoints[i][j]= fopen(name, "w")) == |
| 605 | NULL) |
| 606 | { |
| 607 | g_error(strerror(errno)); |
| 608 | } |
| 609 | } |
| 610 | } |
| 611 | } |
| 612 | |
| 613 | retval= chdir(cwd); |
| 614 | if (retval == -1) |
| 615 | { |
| 616 | g_error(strerror(errno)); |
| 617 | } |
| 618 | free(cwd); |
| 619 | } |
| 620 | |
| 621 | |
| 622 | /* |
| 623 | * Write a message point to a file used to generate graphs |
| 624 | * |
| 625 | * Args: |
| 626 | * stream: FILE*, file pointer where to write the point |
| 627 | * message: message for which to write the point |
| 628 | */ |
| 629 | static void writeMessagePoint(FILE* stream, const Message* const message) |
| 630 | { |
| 631 | uint64_t x, y; |
| 632 | |
| 633 | if (message->inE->traceNum < message->outE->traceNum) |
| 634 | { |
| 635 | // CA is inE->traceNum |
| 636 | x= message->inE->cpuTime; |
| 637 | y= message->outE->cpuTime; |
| 638 | } |
| 639 | else |
| 640 | { |
| 641 | // CA is outE->traceNum |
| 642 | x= message->outE->cpuTime; |
| 643 | y= message->inE->cpuTime; |
| 644 | } |
| 645 | |
| 646 | fprintf(stream, "%20" PRIu64 " %20" PRIu64 "\n", x, y); |
| 647 | } |
| 648 | |
| 649 | |
| 650 | /* |
| 651 | * Close files used to store convex hull points to genereate graphs. |
| 652 | * Deallocate array to store file pointers. |
| 653 | * |
| 654 | * Args: |
| 655 | * syncState: container for synchronization data |
| 656 | */ |
| 657 | static void closeGraphDataFiles(SyncState* const syncState) |
| 658 | { |
| 659 | unsigned int i, j; |
| 660 | MatchingDataTCP* matchingData; |
| 661 | int retval; |
| 662 | |
| 663 | matchingData= (MatchingDataTCP*) syncState->matchingData; |
| 664 | |
| 665 | if (matchingData->messagePoints == NULL) |
| 666 | { |
| 667 | return; |
| 668 | } |
| 669 | |
| 670 | for (i= 0; i < syncState->traceNb; i++) |
| 671 | { |
| 672 | for (j= 0; j < syncState->traceNb; j++) |
| 673 | { |
| 674 | if (i != j) |
| 675 | { |
| 676 | retval= fclose(matchingData->messagePoints[i][j]); |
| 677 | if (retval != 0) |
| 678 | { |
| 679 | g_error(strerror(errno)); |
| 680 | } |
| 681 | } |
| 682 | } |
| 683 | free(matchingData->messagePoints[i]); |
| 684 | } |
| 685 | free(matchingData->messagePoints); |
| 686 | |
| 687 | matchingData->messagePoints= NULL; |
| 688 | } |
| 689 | |
| 690 | |
| 691 | /* |
| 692 | * Write the matching-specific graph lines in the gnuplot script. |
| 693 | * |
| 694 | * Args: |
| 695 | * syncState: container for synchronization data |
| 696 | * i: first trace number |
| 697 | * j: second trace number, garanteed to be larger than i |
| 698 | */ |
| 699 | static void writeMatchingGraphsPlotsTCPMessages(SyncState* const syncState, |
| 700 | const unsigned int i, const unsigned int j) |
| 701 | { |
| 702 | fprintf(syncState->graphsStream, |
| 703 | "\t\"matching_tcp-%1$03d_to_%2$03d.data\" " |
| 704 | "title \"Sent messages\" with points linetype 4 " |
| 705 | "linecolor rgb \"#98fc66\" pointtype 9 pointsize 2, \\\n" |
| 706 | "\t\"matching_tcp-%2$03d_to_%1$03d.data\" " |
| 707 | "title \"Received messages\" with points linetype 4 " |
| 708 | "linecolor rgb \"#6699cc\" pointtype 11 pointsize 2, \\\n", i, j); |
| 709 | } |