| 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 NANOSECONDS_PER_SECOND 1000000000 |
| 20 | #define CPU_FREQ 1e9 |
| 21 | |
| 22 | #ifdef HAVE_CONFIG_H |
| 23 | #include <config.h> |
| 24 | #endif |
| 25 | |
| 26 | #include <errno.h> |
| 27 | #include <math.h> |
| 28 | #include <stdio.h> |
| 29 | #include <stdlib.h> |
| 30 | #include <string.h> |
| 31 | |
| 32 | #include "sync_chain.h" |
| 33 | |
| 34 | #include "event_processing_text.h" |
| 35 | |
| 36 | |
| 37 | // Functions common to all processing modules |
| 38 | static void initProcessingText(SyncState* const syncState, ...); |
| 39 | static void destroyProcessingText(SyncState* const syncState); |
| 40 | static void finalizeProcessingText(SyncState* const syncState); |
| 41 | static void printProcessingStatsText(SyncState* const syncState); |
| 42 | static void writeProcessingTraceTimeOptionsText(SyncState* const syncState, |
| 43 | const unsigned int i, const unsigned int j); |
| 44 | static void writeProcessingTraceTraceOptionsText(SyncState* const syncState, |
| 45 | const unsigned int i, const unsigned int j); |
| 46 | static void writeProcessingGraphVariablesText(SyncState* const syncState, |
| 47 | const unsigned int i); |
| 48 | |
| 49 | // Functions specific to this module |
| 50 | static unsigned int readTraceNb(FILE* testCase); |
| 51 | static void skipCommentLines(FILE* testCase); |
| 52 | |
| 53 | |
| 54 | static ProcessingModule processingModuleText = { |
| 55 | .name= "text", |
| 56 | .initProcessing= &initProcessingText, |
| 57 | .destroyProcessing= &destroyProcessingText, |
| 58 | .finalizeProcessing= &finalizeProcessingText, |
| 59 | .printProcessingStats= &printProcessingStatsText, |
| 60 | .graphFunctions= { |
| 61 | .writeVariables= &writeProcessingGraphVariablesText, |
| 62 | .writeTraceTraceOptions= &writeProcessingTraceTraceOptionsText, |
| 63 | .writeTraceTimeOptions= &writeProcessingTraceTimeOptionsText, |
| 64 | }, |
| 65 | }; |
| 66 | |
| 67 | |
| 68 | /* |
| 69 | * Processing Module registering function |
| 70 | */ |
| 71 | void registerProcessingText() |
| 72 | { |
| 73 | g_queue_push_tail(&processingModules, &processingModuleText); |
| 74 | } |
| 75 | |
| 76 | |
| 77 | /* |
| 78 | * Allocate and initialize data structures for synchronizing a traceset. |
| 79 | * Open test case file. |
| 80 | * |
| 81 | * Args: |
| 82 | * syncState: container for synchronization data. |
| 83 | * testCaseName: const char*, test case file name |
| 84 | */ |
| 85 | static void initProcessingText(SyncState* const syncState, ...) |
| 86 | { |
| 87 | ProcessingDataText* processingData; |
| 88 | const char* testCaseName; |
| 89 | va_list ap; |
| 90 | |
| 91 | processingData= malloc(sizeof(ProcessingDataText)); |
| 92 | syncState->processingData= processingData; |
| 93 | va_start(ap, syncState); |
| 94 | testCaseName= va_arg(ap, const char*); |
| 95 | va_end(ap); |
| 96 | |
| 97 | processingData->testCase= fopen(testCaseName, "r"); |
| 98 | if (processingData->testCase == NULL) |
| 99 | { |
| 100 | g_error(strerror(errno)); |
| 101 | } |
| 102 | syncState->traceNb= readTraceNb(processingData->testCase); |
| 103 | |
| 104 | if (syncState->stats) |
| 105 | { |
| 106 | processingData->factors= NULL; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | |
| 111 | static void destroyProcessingText(SyncState* const syncState) |
| 112 | { |
| 113 | ProcessingDataText* processingData= (ProcessingDataText*) |
| 114 | syncState->processingData; |
| 115 | |
| 116 | if (processingData == NULL) |
| 117 | { |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | fclose(processingData->testCase); |
| 122 | |
| 123 | if (syncState->stats && processingData->factors) |
| 124 | { |
| 125 | g_array_free(processingData->factors, TRUE); |
| 126 | } |
| 127 | |
| 128 | free(syncState->processingData); |
| 129 | syncState->processingData= NULL; |
| 130 | } |
| 131 | |
| 132 | |
| 133 | /* |
| 134 | * Read the test case file and make up events. Dispatch those events to the |
| 135 | * matching module. |
| 136 | * |
| 137 | * Args: |
| 138 | * syncState: container for synchronization data. |
| 139 | */ |
| 140 | static void finalizeProcessingText(SyncState* const syncState) |
| 141 | { |
| 142 | int retval; |
| 143 | unsigned int* seq; |
| 144 | GArray* factors; |
| 145 | ProcessingDataText* processingData= (ProcessingDataText*) |
| 146 | syncState->processingData; |
| 147 | FILE* testCase= processingData->testCase; |
| 148 | char* line= NULL; |
| 149 | size_t bufLen; |
| 150 | |
| 151 | seq= calloc(syncState->traceNb, sizeof(unsigned int)); |
| 152 | |
| 153 | skipCommentLines(testCase); |
| 154 | retval= getline(&line, &bufLen, testCase); |
| 155 | while(!feof(testCase)) |
| 156 | { |
| 157 | unsigned int sender, receiver; |
| 158 | double sendTime, recvTime; |
| 159 | char tmp; |
| 160 | unsigned int i; |
| 161 | |
| 162 | if (retval == -1 && !feof(testCase)) |
| 163 | { |
| 164 | g_error(strerror(errno)); |
| 165 | } |
| 166 | |
| 167 | if (line[retval - 1] == '\n') |
| 168 | { |
| 169 | line[retval - 1]= '\0'; |
| 170 | } |
| 171 | |
| 172 | retval= sscanf(line, " %u %u %lf %lf %c", &sender, &receiver, |
| 173 | &sendTime, &recvTime, &tmp); |
| 174 | if (retval == EOF) |
| 175 | { |
| 176 | g_error(strerror(errno)); |
| 177 | } |
| 178 | else if (retval != 4) |
| 179 | { |
| 180 | g_error("Error parsing test file while looking for data point, line was '%s'", line); |
| 181 | } |
| 182 | |
| 183 | if (sender + 1 > syncState->traceNb) |
| 184 | { |
| 185 | g_error("Error parsing test file, sender is out of range, line was '%s'", line); |
| 186 | } |
| 187 | |
| 188 | if (receiver + 1 > syncState->traceNb) |
| 189 | { |
| 190 | g_error("Error parsing test file, receiver is out of range, line was '%s'", line); |
| 191 | } |
| 192 | |
| 193 | if (sendTime < 0) |
| 194 | { |
| 195 | g_error("Error parsing test file, send time is negative, line was '%s'", line); |
| 196 | } |
| 197 | |
| 198 | if (recvTime < 0) |
| 199 | { |
| 200 | g_error("Error parsing test file, receive time is negative, line was '%s'", line); |
| 201 | } |
| 202 | |
| 203 | // Generate ouput and input events |
| 204 | { |
| 205 | unsigned int addressOffset; |
| 206 | struct { |
| 207 | unsigned int traceNum; |
| 208 | double time; |
| 209 | enum Direction direction; |
| 210 | } loopValues[]= { |
| 211 | {sender, sendTime, OUT}, |
| 212 | {receiver, recvTime, IN}, |
| 213 | }; |
| 214 | |
| 215 | /* addressOffset is added to a traceNum to convert it to an address so |
| 216 | * that the address is not plainly the same as the traceNb. */ |
| 217 | if (syncState->traceNb > 1) |
| 218 | { |
| 219 | addressOffset= pow(10, floor(log(syncState->traceNb - 1) / |
| 220 | log(10)) + 1); |
| 221 | } |
| 222 | else |
| 223 | { |
| 224 | addressOffset= 0; |
| 225 | } |
| 226 | |
| 227 | for (i= 0; i < sizeof(loopValues) / sizeof(*loopValues); i++) |
| 228 | { |
| 229 | Event* event; |
| 230 | |
| 231 | event= malloc(sizeof(Event)); |
| 232 | event->traceNum= loopValues[i].traceNum; |
| 233 | event->wallTime.seconds= floor(loopValues[i].time); |
| 234 | event->wallTime.nanosec= floor((loopValues[i].time - |
| 235 | floor(loopValues[i].time)) * NANOSECONDS_PER_SECOND); |
| 236 | event->cpuTime= round(loopValues[i].time * CPU_FREQ); |
| 237 | event->type= TCP; |
| 238 | event->destroy= &destroyTCPEvent; |
| 239 | event->event.tcpEvent= malloc(sizeof(TCPEvent)); |
| 240 | event->event.tcpEvent->direction= loopValues[i].direction; |
| 241 | event->event.tcpEvent->segmentKey= malloc(sizeof(SegmentKey)); |
| 242 | event->event.tcpEvent->segmentKey->ihl= 5; |
| 243 | event->event.tcpEvent->segmentKey->tot_len= 40; |
| 244 | event->event.tcpEvent->segmentKey->connectionKey.saddr= sender + |
| 245 | addressOffset; |
| 246 | event->event.tcpEvent->segmentKey->connectionKey.daddr= receiver + |
| 247 | addressOffset; |
| 248 | event->event.tcpEvent->segmentKey->connectionKey.source= 57645; |
| 249 | event->event.tcpEvent->segmentKey->connectionKey.dest= 80; |
| 250 | event->event.tcpEvent->segmentKey->seq= seq[sender]; |
| 251 | event->event.tcpEvent->segmentKey->ack_seq= 0; |
| 252 | event->event.tcpEvent->segmentKey->doff= 5; |
| 253 | event->event.tcpEvent->segmentKey->ack= 0; |
| 254 | event->event.tcpEvent->segmentKey->rst= 0; |
| 255 | event->event.tcpEvent->segmentKey->syn= 1; |
| 256 | event->event.tcpEvent->segmentKey->fin= 0; |
| 257 | |
| 258 | syncState->matchingModule->matchEvent(syncState, event); |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | seq[sender]++; |
| 263 | |
| 264 | skipCommentLines(testCase); |
| 265 | retval= getline(&line, &bufLen, testCase); |
| 266 | } |
| 267 | |
| 268 | free(seq); |
| 269 | |
| 270 | if (line) |
| 271 | { |
| 272 | free(line); |
| 273 | } |
| 274 | |
| 275 | factors= syncState->matchingModule->finalizeMatching(syncState); |
| 276 | if (syncState->stats) |
| 277 | { |
| 278 | processingData->factors= factors; |
| 279 | } |
| 280 | else |
| 281 | { |
| 282 | g_array_free(factors, TRUE); |
| 283 | } |
| 284 | } |
| 285 | |
| 286 | |
| 287 | /* |
| 288 | * Print statistics related to processing. Must be called after |
| 289 | * finalizeProcessing. |
| 290 | * |
| 291 | * Args: |
| 292 | * syncState container for synchronization data. |
| 293 | */ |
| 294 | static void printProcessingStatsText(SyncState* const syncState) |
| 295 | { |
| 296 | unsigned int i; |
| 297 | |
| 298 | printf("Resulting synchronization factors:\n"); |
| 299 | for (i= 0; i < syncState->traceNb; i++) |
| 300 | { |
| 301 | Factors* factors= &g_array_index(((ProcessingDataText*) |
| 302 | syncState->processingData)->factors, Factors, i); |
| 303 | |
| 304 | printf("\ttrace %u drift= %g offset= %g (%f)\n", i, factors->drift, |
| 305 | factors->offset, factors->offset / CPU_FREQ); |
| 306 | } |
| 307 | } |
| 308 | |
| 309 | |
| 310 | /* |
| 311 | * Read trace number from the test case stream. The trace number should be the |
| 312 | * first non-comment line and should be an unsigned int by itself on a line. |
| 313 | * |
| 314 | * Args: |
| 315 | * testCase: test case stream |
| 316 | * |
| 317 | * Returns: |
| 318 | * The trace number |
| 319 | */ |
| 320 | static unsigned int readTraceNb(FILE* testCase) |
| 321 | { |
| 322 | unsigned int result; |
| 323 | int retval; |
| 324 | char* line= NULL; |
| 325 | size_t len; |
| 326 | char tmp; |
| 327 | |
| 328 | skipCommentLines(testCase); |
| 329 | retval= getline(&line, &len, testCase); |
| 330 | if (retval == -1) |
| 331 | { |
| 332 | if (feof(testCase)) |
| 333 | { |
| 334 | g_error("Unexpected end of file while looking for number of traces"); |
| 335 | } |
| 336 | else |
| 337 | { |
| 338 | g_error(strerror(errno)); |
| 339 | } |
| 340 | } |
| 341 | if (line[retval - 1] == '\n') |
| 342 | { |
| 343 | line[retval - 1]= '\0'; |
| 344 | } |
| 345 | |
| 346 | retval= sscanf(line, " %u %c", &result, &tmp); |
| 347 | if (retval == EOF || retval != 1) |
| 348 | { |
| 349 | g_error("Error parsing test file while looking for number of traces, line was '%s'", line); |
| 350 | |
| 351 | // Not really needed but avoids warning from gcc |
| 352 | abort(); |
| 353 | } |
| 354 | |
| 355 | if (line) |
| 356 | { |
| 357 | free(line); |
| 358 | } |
| 359 | |
| 360 | return result; |
| 361 | } |
| 362 | |
| 363 | |
| 364 | /* |
| 365 | * Advance testCase stream over empty space, empty lines and lines that begin |
| 366 | * with '#' |
| 367 | * |
| 368 | * Args: |
| 369 | * testCase: test case stream |
| 370 | */ |
| 371 | static void skipCommentLines(FILE* testCase) |
| 372 | { |
| 373 | int firstChar; |
| 374 | ssize_t retval; |
| 375 | char* line= NULL; |
| 376 | size_t len; |
| 377 | |
| 378 | do |
| 379 | { |
| 380 | firstChar= fgetc(testCase); |
| 381 | if (firstChar == (int) '#') |
| 382 | { |
| 383 | retval= getline(&line, &len, testCase); |
| 384 | if (retval == -1) |
| 385 | { |
| 386 | if (feof(testCase)) |
| 387 | { |
| 388 | goto outEof; |
| 389 | } |
| 390 | else |
| 391 | { |
| 392 | g_error(strerror(errno)); |
| 393 | } |
| 394 | } |
| 395 | } |
| 396 | else if (firstChar == (int) '\n' || firstChar == (int) ' ') |
| 397 | {} |
| 398 | else if (firstChar == EOF) |
| 399 | { |
| 400 | goto outEof; |
| 401 | } |
| 402 | else |
| 403 | { |
| 404 | break; |
| 405 | } |
| 406 | } while (true); |
| 407 | retval= ungetc(firstChar, testCase); |
| 408 | if (retval == EOF) |
| 409 | { |
| 410 | g_error("Error: ungetc()"); |
| 411 | } |
| 412 | |
| 413 | outEof: |
| 414 | if (line) |
| 415 | { |
| 416 | free(line); |
| 417 | } |
| 418 | } |
| 419 | |
| 420 | |
| 421 | /* |
| 422 | * Write the processing-specific variables in the gnuplot script. |
| 423 | * |
| 424 | * Args: |
| 425 | * syncState: container for synchronization data |
| 426 | * i: trace number |
| 427 | */ |
| 428 | static void writeProcessingGraphVariablesText(SyncState* const syncState, |
| 429 | const unsigned int i) |
| 430 | { |
| 431 | fprintf(syncState->graphsStream, "clock_freq_%u= %.3f\n", i, CPU_FREQ); |
| 432 | } |
| 433 | |
| 434 | |
| 435 | /* |
| 436 | * Write the processing-specific options in the gnuplot script. |
| 437 | * |
| 438 | * Args: |
| 439 | * syncState: container for synchronization data |
| 440 | * i: first trace number |
| 441 | * j: second trace number, garanteed to be larger than i |
| 442 | */ |
| 443 | static void writeProcessingTraceTraceOptionsText(SyncState* const syncState, |
| 444 | const unsigned int i, const unsigned int j) |
| 445 | { |
| 446 | fprintf(syncState->graphsStream, |
| 447 | "set key inside right bottom\n" |
| 448 | "set xlabel \"Clock %1$u\"\n" |
| 449 | "set xtics nomirror\n" |
| 450 | "set ylabel \"Clock %2$u\"\n" |
| 451 | "set ytics nomirror\n" |
| 452 | "set x2label \"Clock %1$d (s)\"\n" |
| 453 | "set x2range [GPVAL_X_MIN / clock_freq_%1$u : GPVAL_X_MAX / clock_freq_%1$u]\n" |
| 454 | "set x2tics\n" |
| 455 | "set y2label \"Clock %2$d (s)\"\n" |
| 456 | "set y2range [GPVAL_Y_MIN / clock_freq_%2$u : GPVAL_Y_MAX / clock_freq_%2$u]\n" |
| 457 | "set y2tics\n", i, j); |
| 458 | } |
| 459 | |
| 460 | |
| 461 | /* |
| 462 | * Write the processing-specific options in the gnuplot script. |
| 463 | * |
| 464 | * Args: |
| 465 | * syncState: container for synchronization data |
| 466 | * i: first trace number |
| 467 | * j: second trace number, garanteed to be larger than i |
| 468 | */ |
| 469 | static void writeProcessingTraceTimeOptionsText(SyncState* const syncState, |
| 470 | const unsigned int i, const unsigned int j) |
| 471 | { |
| 472 | fprintf(syncState->graphsStream, |
| 473 | "set key inside right bottom\n" |
| 474 | "set xlabel \"Clock %1$u\"\n" |
| 475 | "set xtics nomirror\n" |
| 476 | "set ylabel \"time (s)\"\n" |
| 477 | "set ytics nomirror\n" |
| 478 | "set x2label \"Clock %1$d (s)\"\n" |
| 479 | "set x2range [GPVAL_X_MIN / clock_freq_%1$u : GPVAL_X_MAX / clock_freq_%1$u]\n" |
| 480 | "set x2tics\n", i); |
| 481 | } |