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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 <stdlib.h> | |
24 | #include <sys/time.h> | |
25 | #include <sys/resource.h> | |
26 | ||
27 | #include <lttv/module.h> | |
28 | #include <lttv/option.h> | |
29 | ||
30 | #include "sync_chain.h" | |
31 | ||
32 | ||
33 | #ifndef g_info | |
34 | #define g_info(format...) g_log (G_LOG_DOMAIN, G_LOG_LEVEL_INFO, format) | |
35 | #endif | |
36 | ||
37 | ||
38 | static void init(); | |
39 | static void destroy(); | |
40 | ||
41 | static void timeDiff(struct timeval* const end, const struct timeval* const start); | |
42 | static gint gcfCompareAnalysis(gconstpointer a, gconstpointer b); | |
43 | static gint gcfCompareProcessing(gconstpointer a, gconstpointer b); | |
44 | static void gfAppendAnalysisName(gpointer data, gpointer user_data); | |
45 | ||
46 | static gboolean optionSync; | |
47 | static gboolean optionSyncStats; | |
48 | static gboolean optionSyncNull; | |
49 | static char* optionSyncAnalysis; | |
50 | ||
51 | GQueue processingModules= G_QUEUE_INIT; | |
52 | GQueue matchingModules= G_QUEUE_INIT; | |
53 | GQueue analysisModules= G_QUEUE_INIT; | |
54 | ||
55 | ||
56 | /* | |
57 | * Module init function | |
58 | * | |
59 | * This function is declared to be the module initialization function. Event | |
60 | * modules are registered with a "constructor (102)" attribute except one in | |
61 | * each class (processing, matching, analysis) which is chosen to be the | |
62 | * default and which is registered with a "constructor (101)" attribute. | |
63 | * Constructors with no priority are called after constructors with | |
64 | * priorities. The result is that the list of event modules is known when this | |
65 | * function is executed. | |
66 | */ | |
67 | static void init() | |
68 | { | |
69 | GString* analysisModulesNames; | |
70 | ||
71 | g_debug("\t\t\tXXXX sync init\n"); | |
72 | ||
73 | optionSync= FALSE; | |
74 | lttv_option_add("sync", '\0', "synchronize the time between the traces" , | |
75 | "none", LTTV_OPT_NONE, &optionSync, NULL, NULL); | |
76 | ||
77 | optionSyncStats= FALSE; | |
78 | lttv_option_add("sync-stats", '\0', "print statistics about the time " | |
79 | "synchronization", "none", LTTV_OPT_NONE, &optionSyncStats, NULL, | |
80 | NULL); | |
81 | ||
82 | optionSyncNull= FALSE; | |
83 | lttv_option_add("sync-null", '\0', "read the events but do not perform " | |
84 | "any processing", "none", LTTV_OPT_NONE, &optionSyncNull, NULL, NULL); | |
85 | ||
86 | g_assert(g_queue_get_length(&analysisModules) > 0); | |
87 | optionSyncAnalysis= ((AnalysisModule*) | |
88 | g_queue_peek_head(&analysisModules))->name; | |
89 | analysisModulesNames= g_string_new(""); | |
90 | g_queue_foreach(&analysisModules, &gfAppendAnalysisName, | |
91 | analysisModulesNames); | |
92 | // remove the last ", " | |
93 | g_string_truncate(analysisModulesNames, analysisModulesNames->len - 2); | |
94 | lttv_option_add("sync-analysis", '\0', "specify the algorithm to use for " | |
95 | "event analysis" , analysisModulesNames->str, LTTV_OPT_STRING, | |
96 | &optionSyncAnalysis, NULL, NULL); | |
97 | g_string_free(analysisModulesNames, TRUE); | |
98 | } | |
99 | ||
100 | ||
101 | /* | |
102 | * Module unload function | |
103 | */ | |
104 | static void destroy() | |
105 | { | |
106 | g_debug("\t\t\tXXXX sync destroy\n"); | |
107 | ||
108 | lttv_option_remove("sync"); | |
109 | lttv_option_remove("sync-stats"); | |
110 | lttv_option_remove("sync-null"); | |
111 | lttv_option_remove("sync-analysis"); | |
112 | } | |
113 | ||
114 | ||
115 | /* | |
116 | * Calculate a traceset's drift and offset values based on network events | |
117 | * | |
118 | * The individual correction factors are written out to each trace. | |
119 | * | |
120 | * Args: | |
121 | * traceSetContext: traceset | |
122 | */ | |
123 | void syncTraceset(LttvTracesetContext* const traceSetContext) | |
124 | { | |
125 | SyncState* syncState; | |
126 | struct timeval startTime, endTime; | |
127 | struct rusage startUsage, endUsage; | |
128 | GList* result; | |
129 | int retval; | |
130 | ||
131 | if (optionSync == FALSE) | |
132 | { | |
133 | g_debug("Not synchronizing traceset because option is disabled"); | |
134 | return; | |
135 | } | |
136 | ||
137 | if (optionSyncStats) | |
138 | { | |
139 | gettimeofday(&startTime, 0); | |
140 | getrusage(RUSAGE_SELF, &startUsage); | |
141 | } | |
142 | ||
143 | // Initialize data structures | |
144 | syncState= malloc(sizeof(SyncState)); | |
145 | syncState->traceNb= lttv_traceset_number(traceSetContext->ts); | |
146 | ||
147 | if (optionSyncStats) | |
148 | { | |
149 | syncState->stats= true; | |
150 | } | |
151 | else | |
152 | { | |
153 | syncState->stats= false; | |
154 | } | |
155 | ||
156 | syncState->processingData= NULL; | |
157 | if (optionSyncNull) | |
158 | { | |
159 | result= g_queue_find_custom(&processingModules, "LTTV-null", | |
160 | &gcfCompareProcessing); | |
161 | } | |
162 | else | |
163 | { | |
164 | result= g_queue_find_custom(&processingModules, "LTTV-standard", | |
165 | &gcfCompareProcessing); | |
166 | } | |
167 | g_assert(result != NULL); | |
168 | syncState->processingModule= (ProcessingModule*) result->data; | |
169 | syncState->processingModule->initProcessing(syncState, traceSetContext); | |
170 | ||
171 | syncState->matchingData= NULL; | |
172 | syncState->analysisData= NULL; | |
173 | if (optionSyncNull) | |
174 | { | |
175 | syncState->matchingModule= NULL; | |
176 | syncState->analysisModule= NULL; | |
177 | } | |
178 | else | |
179 | { | |
180 | g_assert(g_queue_get_length(&matchingModules) == 1); | |
181 | syncState->matchingModule= (MatchingModule*) | |
182 | g_queue_peek_head(&matchingModules); | |
183 | syncState->matchingModule->initMatching(syncState); | |
184 | ||
185 | result= g_queue_find_custom(&analysisModules, optionSyncAnalysis, | |
186 | &gcfCompareAnalysis); | |
187 | if (result != NULL) | |
188 | { | |
189 | syncState->analysisModule= (AnalysisModule*) result->data; | |
190 | syncState->analysisModule->initAnalysis(syncState); | |
191 | } | |
192 | else | |
193 | { | |
194 | g_error("Analysis module '%s' not found", optionSyncAnalysis); | |
195 | } | |
196 | } | |
197 | ||
198 | // Process traceset | |
199 | lttv_process_traceset_seek_time(traceSetContext, ltt_time_zero); | |
200 | lttv_process_traceset_middle(traceSetContext, ltt_time_infinite, | |
201 | G_MAXULONG, NULL); | |
202 | lttv_process_traceset_seek_time(traceSetContext, ltt_time_zero); | |
203 | ||
204 | syncState->processingModule->finalizeProcessing(syncState); | |
205 | ||
206 | if (syncState->processingModule->printProcessingStats != NULL) | |
207 | { | |
208 | syncState->processingModule->printProcessingStats(syncState); | |
209 | } | |
210 | ||
211 | syncState->processingModule->destroyProcessing(syncState); | |
212 | if (syncState->matchingModule != NULL) | |
213 | { | |
214 | syncState->matchingModule->destroyMatching(syncState); | |
215 | } | |
216 | if (syncState->analysisModule != NULL) | |
217 | { | |
218 | syncState->analysisModule->destroyAnalysis(syncState); | |
219 | } | |
220 | ||
221 | free(syncState); | |
222 | ||
223 | if (optionSyncStats) | |
224 | { | |
225 | gettimeofday(&endTime, 0); | |
226 | retval= getrusage(RUSAGE_SELF, &endUsage); | |
227 | ||
228 | timeDiff(&endTime, &startTime); | |
229 | timeDiff(&endUsage.ru_utime, &startUsage.ru_utime); | |
230 | timeDiff(&endUsage.ru_stime, &startUsage.ru_stime); | |
231 | ||
232 | printf("Synchronization time:\n"); | |
233 | printf("\treal time: %ld.%06ld\n", endTime.tv_sec, endTime.tv_usec); | |
234 | printf("\tuser time: %ld.%06ld\n", endUsage.ru_utime.tv_sec, | |
235 | endUsage.ru_utime.tv_usec); | |
236 | printf("\tsystem time: %ld.%06ld\n", endUsage.ru_stime.tv_sec, | |
237 | endUsage.ru_stime.tv_usec); | |
238 | } | |
239 | } | |
240 | ||
241 | ||
242 | /* | |
243 | * Calculate the elapsed time between two timeval values | |
244 | * | |
245 | * Args: | |
246 | * end: end time, result is also stored in this structure | |
247 | * start: start time | |
248 | */ | |
249 | static void timeDiff(struct timeval* const end, const struct timeval* const start) | |
250 | { | |
251 | if (end->tv_usec >= start->tv_usec) | |
252 | { | |
253 | end->tv_sec-= start->tv_sec; | |
254 | end->tv_usec-= start->tv_usec; | |
255 | } | |
256 | else | |
257 | { | |
258 | end->tv_sec= end->tv_sec - start->tv_sec - 1; | |
259 | end->tv_usec= end->tv_usec - start->tv_usec + 1e6; | |
260 | } | |
261 | } | |
262 | ||
263 | ||
264 | /* | |
265 | * A GCompareFunc for g_slist_find_custom() | |
266 | * | |
267 | * Args: | |
268 | * a: AnalysisModule*, element's data | |
269 | * b: char*, user data to compare against | |
270 | * | |
271 | * Returns: | |
272 | * 0 if the analysis module a's name is b | |
273 | */ | |
274 | static gint gcfCompareAnalysis(gconstpointer a, gconstpointer b) | |
275 | { | |
276 | const AnalysisModule* analysisModule; | |
277 | const char* name; | |
278 | ||
279 | analysisModule= (const AnalysisModule*)a; | |
280 | name= (const char*)b; | |
281 | ||
282 | return strncmp(analysisModule->name, name, strlen(analysisModule->name) + | |
283 | 1); | |
284 | } | |
285 | ||
286 | ||
287 | /* | |
288 | * A GCompareFunc for g_slist_find_custom() | |
289 | * | |
290 | * Args: | |
291 | * a: ProcessingModule*, element's data | |
292 | * b: char*, user data to compare against | |
293 | * | |
294 | * Returns: | |
295 | * 0 if the analysis module a's name is b | |
296 | */ | |
297 | static gint gcfCompareProcessing(gconstpointer a, gconstpointer b) | |
298 | { | |
299 | const ProcessingModule* processingModule; | |
300 | const char* name; | |
301 | ||
302 | processingModule= (const ProcessingModule*)a; | |
303 | name= (const char*)b; | |
304 | ||
305 | return strncmp(processingModule->name, name, | |
306 | strlen(processingModule->name) + 1); | |
307 | } | |
308 | ||
309 | ||
310 | /* | |
311 | * A GFunc for g_queue_foreach() | |
312 | * | |
313 | * Concatenate analysis module names. | |
314 | * | |
315 | * Args: | |
316 | * data: AnalysisModule* | |
317 | * user_data: GString*, concatenated names | |
318 | */ | |
319 | static void gfAppendAnalysisName(gpointer data, gpointer user_data) | |
320 | { | |
321 | g_string_append((GString*) user_data, ((AnalysisModule*) data)->name); | |
322 | g_string_append((GString*) user_data, ", "); | |
323 | } | |
324 | ||
325 | ||
326 | LTTV_MODULE("sync", "Synchronize traces", \ | |
327 | "Synchronizes a traceset based on the correspondance of network events", \ | |
328 | init, destroy, "option") | |
329 |