| 1 | /* This file is part of the Linux Trace Toolkit viewer |
| 2 | * Copyright (C) 2009 Benjamin Poirier <benjamin.poirier@polymtl.ca> |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License Version 2 as |
| 6 | * published by the Free Software Foundation; |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 16 | * MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifdef HAVE_CONFIG_H |
| 20 | #include <config.h> |
| 21 | #endif |
| 22 | |
| 23 | #include <errno.h> |
| 24 | #include <fcntl.h> |
| 25 | #include <stdio.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <sys/resource.h> |
| 28 | #include <sys/stat.h> |
| 29 | #include <sys/types.h> |
| 30 | #include <sys/stat.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include <lttv/module.h> |
| 34 | #include <lttv/option.h> |
| 35 | |
| 36 | #include "sync_chain.h" |
| 37 | #include "sync_chain_lttv.h" |
| 38 | |
| 39 | |
| 40 | static void init(); |
| 41 | static void destroy(); |
| 42 | |
| 43 | static void gfAddModuleOption(gpointer data, gpointer user_data); |
| 44 | static void gfRemoveModuleOption(gpointer data, gpointer user_data); |
| 45 | |
| 46 | static ModuleOption optionSync= { |
| 47 | .longName= "sync", |
| 48 | .hasArg= NO_ARG, |
| 49 | .optionHelp= "synchronize the time between the traces", |
| 50 | }; |
| 51 | static ModuleOption optionSyncStats= { |
| 52 | .longName= "sync-stats", |
| 53 | .hasArg= NO_ARG, |
| 54 | .optionHelp= "print statistics about the time synchronization", |
| 55 | }; |
| 56 | static ModuleOption optionSyncNull= { |
| 57 | .longName= "sync-null", |
| 58 | .hasArg= NO_ARG, |
| 59 | .optionHelp= "read the events but do not perform any processing", |
| 60 | }; |
| 61 | static GString* analysisModulesNames; |
| 62 | static ModuleOption optionSyncAnalysis= { |
| 63 | .longName= "sync-analysis", |
| 64 | .hasArg= REQUIRED_ARG, |
| 65 | .optionHelp= "specify the algorithm to use for event analysis", |
| 66 | }; |
| 67 | static ModuleOption optionSyncGraphs= { |
| 68 | .longName= "sync-graphs", |
| 69 | .hasArg= NO_ARG, |
| 70 | .optionHelp= "output gnuplot graph showing synchronization points", |
| 71 | }; |
| 72 | static char graphsDir[20]; |
| 73 | static ModuleOption optionSyncGraphsDir= { |
| 74 | .longName= "sync-graphs-dir", |
| 75 | .hasArg= REQUIRED_ARG, |
| 76 | .optionHelp= "specify the directory where to store the graphs", |
| 77 | }; |
| 78 | |
| 79 | |
| 80 | /* |
| 81 | * Module init function |
| 82 | * |
| 83 | * This function is declared to be the module initialization function. Event |
| 84 | * modules are registered with a "constructor (102)" attribute except one in |
| 85 | * each class (processing, matching, analysis) which is chosen to be the |
| 86 | * default and which is registered with a "constructor (101)" attribute. |
| 87 | * Constructors with no priority are called after constructors with |
| 88 | * priorities. The result is that the list of event modules is known when this |
| 89 | * function is executed. |
| 90 | */ |
| 91 | static void init() |
| 92 | { |
| 93 | int retval; |
| 94 | |
| 95 | g_debug("Sync init"); |
| 96 | |
| 97 | g_assert(g_queue_get_length(&analysisModules) > 0); |
| 98 | optionSyncAnalysis.arg= ((AnalysisModule*) |
| 99 | g_queue_peek_head(&analysisModules))->name; |
| 100 | analysisModulesNames= g_string_new(""); |
| 101 | g_queue_foreach(&analysisModules, &gfAppendAnalysisName, |
| 102 | analysisModulesNames); |
| 103 | // remove the last ", " |
| 104 | g_string_truncate(analysisModulesNames, analysisModulesNames->len - 2); |
| 105 | optionSyncAnalysis.argHelp= analysisModulesNames->str; |
| 106 | |
| 107 | retval= snprintf(graphsDir, sizeof(graphsDir), "graphs-%d", getpid()); |
| 108 | if (retval > sizeof(graphsDir) - 1) |
| 109 | { |
| 110 | graphsDir[sizeof(graphsDir) - 1]= '\0'; |
| 111 | } |
| 112 | optionSyncGraphsDir.arg= graphsDir; |
| 113 | optionSyncGraphsDir.argHelp= graphsDir; |
| 114 | |
| 115 | g_queue_push_head(&moduleOptions, &optionSyncGraphsDir); |
| 116 | g_queue_push_head(&moduleOptions, &optionSyncGraphs); |
| 117 | g_queue_push_head(&moduleOptions, &optionSyncAnalysis); |
| 118 | g_queue_push_head(&moduleOptions, &optionSyncNull); |
| 119 | g_queue_push_head(&moduleOptions, &optionSyncStats); |
| 120 | g_queue_push_head(&moduleOptions, &optionSync); |
| 121 | |
| 122 | g_queue_foreach(&moduleOptions, &gfAddModuleOption, NULL); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | /* |
| 127 | * Module unload function |
| 128 | */ |
| 129 | static void destroy() |
| 130 | { |
| 131 | g_debug("Sync destroy"); |
| 132 | |
| 133 | g_queue_foreach(&moduleOptions, &gfRemoveModuleOption, NULL); |
| 134 | g_string_free(analysisModulesNames, TRUE); |
| 135 | |
| 136 | g_queue_clear(&processingModules); |
| 137 | g_queue_clear(&matchingModules); |
| 138 | g_queue_clear(&analysisModules); |
| 139 | g_queue_clear(&moduleOptions); |
| 140 | } |
| 141 | |
| 142 | |
| 143 | /* |
| 144 | * Calculate a traceset's drift and offset values based on network events |
| 145 | * |
| 146 | * The individual correction factors are written out to each trace. |
| 147 | * |
| 148 | * Args: |
| 149 | * traceSetContext: traceset |
| 150 | */ |
| 151 | void syncTraceset(LttvTracesetContext* const traceSetContext) |
| 152 | { |
| 153 | SyncState* syncState; |
| 154 | struct timeval startTime, endTime; |
| 155 | struct rusage startUsage, endUsage; |
| 156 | GList* result; |
| 157 | unsigned int i; |
| 158 | int retval; |
| 159 | |
| 160 | if (!optionSync.present) |
| 161 | { |
| 162 | g_debug("Not synchronizing traceset because option is disabled"); |
| 163 | return; |
| 164 | } |
| 165 | |
| 166 | if (optionSyncStats.present) |
| 167 | { |
| 168 | gettimeofday(&startTime, 0); |
| 169 | getrusage(RUSAGE_SELF, &startUsage); |
| 170 | } |
| 171 | |
| 172 | // Initialize data structures |
| 173 | syncState= malloc(sizeof(SyncState)); |
| 174 | |
| 175 | if (optionSyncStats.present) |
| 176 | { |
| 177 | syncState->stats= true; |
| 178 | } |
| 179 | else |
| 180 | { |
| 181 | syncState->stats= false; |
| 182 | } |
| 183 | |
| 184 | if (!optionSyncNull.present && optionSyncGraphs.present) |
| 185 | { |
| 186 | // Create the graph directory right away in case the module initialization |
| 187 | // functions have something to write in it. |
| 188 | syncState->graphsDir= optionSyncGraphsDir.arg; |
| 189 | syncState->graphsStream= createGraphsDir(syncState->graphsDir); |
| 190 | } |
| 191 | else |
| 192 | { |
| 193 | syncState->graphsStream= NULL; |
| 194 | syncState->graphsDir= NULL; |
| 195 | } |
| 196 | |
| 197 | // Identify and initialize modules |
| 198 | syncState->processingData= NULL; |
| 199 | if (optionSyncNull.present) |
| 200 | { |
| 201 | result= g_queue_find_custom(&processingModules, "LTTV-null", |
| 202 | &gcfCompareProcessing); |
| 203 | } |
| 204 | else |
| 205 | { |
| 206 | result= g_queue_find_custom(&processingModules, "LTTV-standard", |
| 207 | &gcfCompareProcessing); |
| 208 | } |
| 209 | g_assert(result != NULL); |
| 210 | syncState->processingModule= (ProcessingModule*) result->data; |
| 211 | |
| 212 | syncState->matchingData= NULL; |
| 213 | result= g_queue_find_custom(&matchingModules, "TCP", &gcfCompareMatching); |
| 214 | g_assert(result != NULL); |
| 215 | syncState->matchingModule= (MatchingModule*) result->data; |
| 216 | |
| 217 | syncState->analysisData= NULL; |
| 218 | result= g_queue_find_custom(&analysisModules, optionSyncAnalysis.arg, |
| 219 | &gcfCompareAnalysis); |
| 220 | if (result != NULL) |
| 221 | { |
| 222 | syncState->analysisModule= (AnalysisModule*) result->data; |
| 223 | } |
| 224 | else |
| 225 | { |
| 226 | g_error("Analysis module '%s' not found", optionSyncAnalysis.arg); |
| 227 | } |
| 228 | |
| 229 | syncState->processingModule->initProcessing(syncState, traceSetContext); |
| 230 | if (!optionSyncNull.present) |
| 231 | { |
| 232 | syncState->matchingModule->initMatching(syncState); |
| 233 | syncState->analysisModule->initAnalysis(syncState); |
| 234 | } |
| 235 | |
| 236 | // Process traceset |
| 237 | lttv_process_traceset_seek_time(traceSetContext, ltt_time_zero); |
| 238 | lttv_process_traceset_middle(traceSetContext, ltt_time_infinite, |
| 239 | G_MAXULONG, NULL); |
| 240 | lttv_process_traceset_seek_time(traceSetContext, ltt_time_zero); |
| 241 | |
| 242 | syncState->processingModule->finalizeProcessing(syncState); |
| 243 | |
| 244 | // Write graphs file |
| 245 | if (!optionSyncNull.present && optionSyncGraphs.present) |
| 246 | { |
| 247 | writeGraphsScript(syncState); |
| 248 | |
| 249 | if (fclose(syncState->graphsStream) != 0) |
| 250 | { |
| 251 | g_error(strerror(errno)); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | if (!optionSyncNull.present && optionSyncStats.present) |
| 256 | { |
| 257 | printStats(syncState); |
| 258 | |
| 259 | printf("Resulting synchronization factors:\n"); |
| 260 | for (i= 0; i < syncState->traceNb; i++) |
| 261 | { |
| 262 | LttTrace* t; |
| 263 | |
| 264 | t= traceSetContext->traces[i]->t; |
| 265 | |
| 266 | printf("\ttrace %u drift= %g offset= %g (%f) start time= %ld.%09ld\n", |
| 267 | i, t->drift, t->offset, (double) tsc_to_uint64(t->freq_scale, |
| 268 | t->start_freq, t->offset) / NANOSECONDS_PER_SECOND, |
| 269 | t->start_time_from_tsc.tv_sec, |
| 270 | t->start_time_from_tsc.tv_nsec); |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | syncState->processingModule->destroyProcessing(syncState); |
| 275 | if (syncState->matchingModule != NULL) |
| 276 | { |
| 277 | syncState->matchingModule->destroyMatching(syncState); |
| 278 | } |
| 279 | if (syncState->analysisModule != NULL) |
| 280 | { |
| 281 | syncState->analysisModule->destroyAnalysis(syncState); |
| 282 | } |
| 283 | |
| 284 | free(syncState); |
| 285 | |
| 286 | if (optionSyncStats.present) |
| 287 | { |
| 288 | gettimeofday(&endTime, 0); |
| 289 | retval= getrusage(RUSAGE_SELF, &endUsage); |
| 290 | |
| 291 | timeDiff(&endTime, &startTime); |
| 292 | timeDiff(&endUsage.ru_utime, &startUsage.ru_utime); |
| 293 | timeDiff(&endUsage.ru_stime, &startUsage.ru_stime); |
| 294 | |
| 295 | printf("Synchronization time:\n"); |
| 296 | printf("\treal time: %ld.%06ld\n", endTime.tv_sec, endTime.tv_usec); |
| 297 | printf("\tuser time: %ld.%06ld\n", endUsage.ru_utime.tv_sec, |
| 298 | endUsage.ru_utime.tv_usec); |
| 299 | printf("\tsystem time: %ld.%06ld\n", endUsage.ru_stime.tv_sec, |
| 300 | endUsage.ru_stime.tv_usec); |
| 301 | } |
| 302 | } |
| 303 | |
| 304 | |
| 305 | /* |
| 306 | * A GFunc for g_queue_foreach() |
| 307 | * |
| 308 | * Args: |
| 309 | * data: ModuleOption* |
| 310 | * user_data: NULL |
| 311 | */ |
| 312 | static void gfAddModuleOption(gpointer data, gpointer user_data) |
| 313 | { |
| 314 | ModuleOption* option= data; |
| 315 | LttvOptionType conversion[]= { |
| 316 | [NO_ARG]= LTTV_OPT_NONE, |
| 317 | [OPTIONAL_ARG]= LTTV_OPT_NONE, |
| 318 | [REQUIRED_ARG]= LTTV_OPT_STRING, |
| 319 | }; |
| 320 | size_t fieldOffset[]= { |
| 321 | [NO_ARG]= offsetof(ModuleOption, present), |
| 322 | [REQUIRED_ARG]= offsetof(ModuleOption, arg), |
| 323 | }; |
| 324 | static const char* argHelpNone= "none"; |
| 325 | |
| 326 | g_assert_cmpuint(sizeof(conversion) / sizeof(*conversion), ==, |
| 327 | HAS_ARG_COUNT); |
| 328 | if (option->hasArg == OPTIONAL_ARG) |
| 329 | { |
| 330 | g_warning("Parameters with optional arguments not supported by the " |
| 331 | "lttv option scheme, parameter '%s' will not be available", |
| 332 | option->longName); |
| 333 | } |
| 334 | else |
| 335 | { |
| 336 | lttv_option_add(option->longName, '\0', option->optionHelp, |
| 337 | option->argHelp ? option->argHelp : argHelpNone, |
| 338 | conversion[option->hasArg], (void*) option + fieldOffset[option->hasArg], |
| 339 | NULL, NULL); |
| 340 | } |
| 341 | } |
| 342 | |
| 343 | |
| 344 | /* |
| 345 | * A GFunc for g_queue_foreach() |
| 346 | * |
| 347 | * Args: |
| 348 | * data: ModuleOption* |
| 349 | * user_data: NULL |
| 350 | */ |
| 351 | static void gfRemoveModuleOption(gpointer data, gpointer user_data) |
| 352 | { |
| 353 | lttv_option_remove(((ModuleOption*) data)->longName); |
| 354 | } |
| 355 | |
| 356 | |
| 357 | LTTV_MODULE("sync", "Synchronize traces", \ |
| 358 | "Synchronizes a traceset based on the correspondance of network events", \ |
| 359 | init, destroy, "option") |