1 // SPDX-License-Identifier: GPL-2.0 2 #include <dirent.h> 3 #include <errno.h> 4 #include <stdio.h> 5 #include <stdlib.h> 6 #include <string.h> 7 #include <sys/param.h> 8 9 #include <api/fs/tracing_path.h> 10 #include <linux/stddef.h> 11 #include <linux/perf_event.h> 12 #include <linux/zalloc.h> 13 #include <subcmd/pager.h> 14 15 #include "build-id.h" 16 #include "debug.h" 17 #include "evsel.h" 18 #include "metricgroup.h" 19 #include "parse-events.h" 20 #include "pmu.h" 21 #include "print-events.h" 22 #include "probe-file.h" 23 #include "string2.h" 24 #include "strlist.h" 25 #include "tracepoint.h" 26 #include "pfm.h" 27 #include "pmu-hybrid.h" 28 29 #define MAX_NAME_LEN 100 30 31 /** Strings corresponding to enum perf_type_id. */ 32 static const char * const event_type_descriptors[] = { 33 "Hardware event", 34 "Software event", 35 "Tracepoint event", 36 "Hardware cache event", 37 "Raw hardware event descriptor", 38 "Hardware breakpoint", 39 }; 40 41 static const struct event_symbol event_symbols_tool[PERF_TOOL_MAX] = { 42 [PERF_TOOL_DURATION_TIME] = { 43 .symbol = "duration_time", 44 .alias = "", 45 }, 46 [PERF_TOOL_USER_TIME] = { 47 .symbol = "user_time", 48 .alias = "", 49 }, 50 [PERF_TOOL_SYSTEM_TIME] = { 51 .symbol = "system_time", 52 .alias = "", 53 }, 54 }; 55 56 /* 57 * Print the events from <debugfs_mount_point>/tracing/events 58 */ 59 void print_tracepoint_events(const struct print_callbacks *print_cb, void *print_state) 60 { 61 struct dirent **sys_namelist = NULL; 62 int sys_items = tracing_events__scandir_alphasort(&sys_namelist); 63 64 for (int i = 0; i < sys_items; i++) { 65 struct dirent *sys_dirent = sys_namelist[i]; 66 struct dirent **evt_namelist = NULL; 67 char *dir_path; 68 int evt_items; 69 70 if (sys_dirent->d_type != DT_DIR || 71 !strcmp(sys_dirent->d_name, ".") || 72 !strcmp(sys_dirent->d_name, "..")) 73 continue; 74 75 dir_path = get_events_file(sys_dirent->d_name); 76 if (!dir_path) 77 continue; 78 79 evt_items = scandir(dir_path, &evt_namelist, NULL, alphasort); 80 for (int j = 0; j < evt_items; j++) { 81 struct dirent *evt_dirent = evt_namelist[j]; 82 char evt_path[MAXPATHLEN]; 83 84 if (evt_dirent->d_type != DT_DIR || 85 !strcmp(evt_dirent->d_name, ".") || 86 !strcmp(evt_dirent->d_name, "..")) 87 continue; 88 89 if (tp_event_has_id(dir_path, evt_dirent) != 0) 90 continue; 91 92 snprintf(evt_path, MAXPATHLEN, "%s:%s", 93 sys_dirent->d_name, evt_dirent->d_name); 94 print_cb->print_event(print_state, 95 /*topic=*/NULL, 96 /*pmu_name=*/NULL, 97 evt_path, 98 /*event_alias=*/NULL, 99 /*scale_unit=*/NULL, 100 /*deprecated=*/false, 101 "Tracepoint event", 102 /*desc=*/NULL, 103 /*long_desc=*/NULL, 104 /*encoding_desc=*/NULL, 105 /*metric_name=*/NULL, 106 /*metric_expr=*/NULL); 107 } 108 free(dir_path); 109 free(evt_namelist); 110 } 111 free(sys_namelist); 112 } 113 114 void print_sdt_events(const struct print_callbacks *print_cb, void *print_state) 115 { 116 struct strlist *bidlist, *sdtlist; 117 struct str_node *bid_nd, *sdt_name, *next_sdt_name; 118 const char *last_sdt_name = NULL; 119 120 /* 121 * The implicitly sorted sdtlist will hold the tracepoint name followed 122 * by @<buildid>. If the tracepoint name is unique (determined by 123 * looking at the adjacent nodes) the @<buildid> is dropped otherwise 124 * the executable path and buildid are added to the name. 125 */ 126 sdtlist = strlist__new(NULL, NULL); 127 if (!sdtlist) { 128 pr_debug("Failed to allocate new strlist for SDT\n"); 129 return; 130 } 131 bidlist = build_id_cache__list_all(true); 132 if (!bidlist) { 133 pr_debug("Failed to get buildids: %d\n", errno); 134 return; 135 } 136 strlist__for_each_entry(bid_nd, bidlist) { 137 struct probe_cache *pcache; 138 struct probe_cache_entry *ent; 139 140 pcache = probe_cache__new(bid_nd->s, NULL); 141 if (!pcache) 142 continue; 143 list_for_each_entry(ent, &pcache->entries, node) { 144 char buf[1024]; 145 146 snprintf(buf, sizeof(buf), "%s:%s@%s", 147 ent->pev.group, ent->pev.event, bid_nd->s); 148 strlist__add(sdtlist, buf); 149 } 150 probe_cache__delete(pcache); 151 } 152 strlist__delete(bidlist); 153 154 strlist__for_each_entry(sdt_name, sdtlist) { 155 bool show_detail = false; 156 char *bid = strchr(sdt_name->s, '@'); 157 char *evt_name = NULL; 158 159 if (bid) 160 *(bid++) = '\0'; 161 162 if (last_sdt_name && !strcmp(last_sdt_name, sdt_name->s)) { 163 show_detail = true; 164 } else { 165 next_sdt_name = strlist__next(sdt_name); 166 if (next_sdt_name) { 167 char *bid2 = strchr(next_sdt_name->s, '@'); 168 169 if (bid2) 170 *bid2 = '\0'; 171 if (strcmp(sdt_name->s, next_sdt_name->s) == 0) 172 show_detail = true; 173 if (bid2) 174 *bid2 = '@'; 175 } 176 } 177 last_sdt_name = sdt_name->s; 178 179 if (show_detail) { 180 char *path = build_id_cache__origname(bid); 181 182 if (path) { 183 if (asprintf(&evt_name, "%s@%s(%.12s)", sdt_name->s, path, bid) < 0) 184 evt_name = NULL; 185 free(path); 186 } 187 } 188 print_cb->print_event(print_state, 189 /*topic=*/NULL, 190 /*pmu_name=*/NULL, 191 evt_name ?: sdt_name->s, 192 /*event_alias=*/NULL, 193 /*deprecated=*/false, 194 /*scale_unit=*/NULL, 195 "SDT event", 196 /*desc=*/NULL, 197 /*long_desc=*/NULL, 198 /*encoding_desc=*/NULL, 199 /*metric_name=*/NULL, 200 /*metric_expr=*/NULL); 201 202 free(evt_name); 203 } 204 strlist__delete(sdtlist); 205 } 206 207 int print_hwcache_events(const struct print_callbacks *print_cb, void *print_state) 208 { 209 struct strlist *evt_name_list = strlist__new(NULL, NULL); 210 struct str_node *nd; 211 212 if (!evt_name_list) { 213 pr_debug("Failed to allocate new strlist for hwcache events\n"); 214 return -ENOMEM; 215 } 216 for (int type = 0; type < PERF_COUNT_HW_CACHE_MAX; type++) { 217 for (int op = 0; op < PERF_COUNT_HW_CACHE_OP_MAX; op++) { 218 /* skip invalid cache type */ 219 if (!evsel__is_cache_op_valid(type, op)) 220 continue; 221 222 for (int i = 0; i < PERF_COUNT_HW_CACHE_RESULT_MAX; i++) { 223 struct perf_pmu *pmu = NULL; 224 char name[64]; 225 226 __evsel__hw_cache_type_op_res_name(type, op, i, name, sizeof(name)); 227 if (!perf_pmu__has_hybrid()) { 228 if (is_event_supported(PERF_TYPE_HW_CACHE, 229 type | (op << 8) | (i << 16))) 230 strlist__add(evt_name_list, name); 231 continue; 232 } 233 perf_pmu__for_each_hybrid_pmu(pmu) { 234 if (is_event_supported(PERF_TYPE_HW_CACHE, 235 type | (op << 8) | (i << 16) | 236 ((__u64)pmu->type << PERF_PMU_TYPE_SHIFT))) { 237 char new_name[128]; 238 snprintf(new_name, sizeof(new_name), 239 "%s/%s/", pmu->name, name); 240 strlist__add(evt_name_list, new_name); 241 } 242 } 243 } 244 } 245 } 246 247 strlist__for_each_entry(nd, evt_name_list) { 248 print_cb->print_event(print_state, 249 "cache", 250 /*pmu_name=*/NULL, 251 nd->s, 252 /*event_alias=*/NULL, 253 /*scale_unit=*/NULL, 254 /*deprecated=*/false, 255 event_type_descriptors[PERF_TYPE_HW_CACHE], 256 /*desc=*/NULL, 257 /*long_desc=*/NULL, 258 /*encoding_desc=*/NULL, 259 /*metric_name=*/NULL, 260 /*metric_expr=*/NULL); 261 } 262 strlist__delete(evt_name_list); 263 return 0; 264 } 265 266 void print_tool_events(const struct print_callbacks *print_cb, void *print_state) 267 { 268 // Start at 1 because the first enum entry means no tool event. 269 for (int i = 1; i < PERF_TOOL_MAX; ++i) { 270 print_cb->print_event(print_state, 271 "tool", 272 /*pmu_name=*/NULL, 273 event_symbols_tool[i].symbol, 274 event_symbols_tool[i].alias, 275 /*scale_unit=*/NULL, 276 /*deprecated=*/false, 277 "Tool event", 278 /*desc=*/NULL, 279 /*long_desc=*/NULL, 280 /*encoding_desc=*/NULL, 281 /*metric_name=*/NULL, 282 /*metric_expr=*/NULL); 283 } 284 } 285 286 void print_symbol_events(const struct print_callbacks *print_cb, void *print_state, 287 unsigned int type, const struct event_symbol *syms, 288 unsigned int max) 289 { 290 struct strlist *evt_name_list = strlist__new(NULL, NULL); 291 struct str_node *nd; 292 293 if (!evt_name_list) { 294 pr_debug("Failed to allocate new strlist for symbol events\n"); 295 return; 296 } 297 for (unsigned int i = 0; i < max; i++) { 298 /* 299 * New attr.config still not supported here, the latest 300 * example was PERF_COUNT_SW_CGROUP_SWITCHES 301 */ 302 if (syms[i].symbol == NULL) 303 continue; 304 305 if (!is_event_supported(type, i)) 306 continue; 307 308 if (strlen(syms[i].alias)) { 309 char name[MAX_NAME_LEN]; 310 311 snprintf(name, MAX_NAME_LEN, "%s OR %s", syms[i].symbol, syms[i].alias); 312 strlist__add(evt_name_list, name); 313 } else 314 strlist__add(evt_name_list, syms[i].symbol); 315 } 316 317 strlist__for_each_entry(nd, evt_name_list) { 318 char *alias = strstr(nd->s, " OR "); 319 320 if (alias) { 321 *alias = '\0'; 322 alias += 4; 323 } 324 print_cb->print_event(print_state, 325 /*topic=*/NULL, 326 /*pmu_name=*/NULL, 327 nd->s, 328 alias, 329 /*scale_unit=*/NULL, 330 /*deprecated=*/false, 331 event_type_descriptors[type], 332 /*desc=*/NULL, 333 /*long_desc=*/NULL, 334 /*encoding_desc=*/NULL, 335 /*metric_name=*/NULL, 336 /*metric_expr=*/NULL); 337 } 338 strlist__delete(evt_name_list); 339 } 340 341 /* 342 * Print the help text for the event symbols: 343 */ 344 void print_events(const struct print_callbacks *print_cb, void *print_state) 345 { 346 print_symbol_events(print_cb, print_state, PERF_TYPE_HARDWARE, 347 event_symbols_hw, PERF_COUNT_HW_MAX); 348 print_symbol_events(print_cb, print_state, PERF_TYPE_SOFTWARE, 349 event_symbols_sw, PERF_COUNT_SW_MAX); 350 351 print_tool_events(print_cb, print_state); 352 353 print_hwcache_events(print_cb, print_state); 354 355 print_pmu_events(print_cb, print_state); 356 357 print_cb->print_event(print_state, 358 /*topic=*/NULL, 359 /*pmu_name=*/NULL, 360 "rNNN", 361 /*event_alias=*/NULL, 362 /*scale_unit=*/NULL, 363 /*deprecated=*/false, 364 event_type_descriptors[PERF_TYPE_RAW], 365 /*desc=*/NULL, 366 /*long_desc=*/NULL, 367 /*encoding_desc=*/NULL, 368 /*metric_name=*/NULL, 369 /*metric_expr=*/NULL); 370 371 print_cb->print_event(print_state, 372 /*topic=*/NULL, 373 /*pmu_name=*/NULL, 374 "cpu/t1=v1[,t2=v2,t3 ...]/modifier", 375 /*event_alias=*/NULL, 376 /*scale_unit=*/NULL, 377 /*deprecated=*/false, 378 event_type_descriptors[PERF_TYPE_RAW], 379 "(see 'man perf-list' on how to encode it)", 380 /*long_desc=*/NULL, 381 /*encoding_desc=*/NULL, 382 /*metric_name=*/NULL, 383 /*metric_expr=*/NULL); 384 385 print_cb->print_event(print_state, 386 /*topic=*/NULL, 387 /*pmu_name=*/NULL, 388 "mem:<addr>[/len][:access]", 389 /*scale_unit=*/NULL, 390 /*event_alias=*/NULL, 391 /*deprecated=*/false, 392 event_type_descriptors[PERF_TYPE_BREAKPOINT], 393 /*desc=*/NULL, 394 /*long_desc=*/NULL, 395 /*encoding_desc=*/NULL, 396 /*metric_name=*/NULL, 397 /*metric_expr=*/NULL); 398 399 print_tracepoint_events(print_cb, print_state); 400 401 print_sdt_events(print_cb, print_state); 402 403 metricgroup__print(print_cb, print_state); 404 405 print_libpfm_events(print_cb, print_state); 406 } 407