1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef __PERF_EVLIST_H 3 #define __PERF_EVLIST_H 1 4 5 #include <linux/compiler.h> 6 #include <linux/kernel.h> 7 #include <linux/refcount.h> 8 #include <linux/list.h> 9 #include <api/fd/array.h> 10 #include <internal/evlist.h> 11 #include <internal/evsel.h> 12 #include <perf/evlist.h> 13 #include "events_stats.h" 14 #include "evsel.h" 15 #include <pthread.h> 16 #include <signal.h> 17 #include <unistd.h> 18 19 struct pollfd; 20 struct thread_map; 21 struct perf_cpu_map; 22 struct record_opts; 23 24 /* 25 * State machine of bkw_mmap_state: 26 * 27 * .________________(forbid)_____________. 28 * | V 29 * NOTREADY --(0)--> RUNNING --(1)--> DATA_PENDING --(2)--> EMPTY 30 * ^ ^ | ^ | 31 * | |__(forbid)____/ |___(forbid)___/| 32 * | | 33 * \_________________(3)_______________/ 34 * 35 * NOTREADY : Backward ring buffers are not ready 36 * RUNNING : Backward ring buffers are recording 37 * DATA_PENDING : We are required to collect data from backward ring buffers 38 * EMPTY : We have collected data from backward ring buffers. 39 * 40 * (0): Setup backward ring buffer 41 * (1): Pause ring buffers for reading 42 * (2): Read from ring buffers 43 * (3): Resume ring buffers for recording 44 */ 45 enum bkw_mmap_state { 46 BKW_MMAP_NOTREADY, 47 BKW_MMAP_RUNNING, 48 BKW_MMAP_DATA_PENDING, 49 BKW_MMAP_EMPTY, 50 }; 51 52 struct event_enable_timer; 53 54 struct evlist { 55 struct perf_evlist core; 56 bool enabled; 57 int id_pos; 58 int is_pos; 59 u64 combined_sample_type; 60 enum bkw_mmap_state bkw_mmap_state; 61 struct { 62 int cork_fd; 63 pid_t pid; 64 } workload; 65 struct mmap *mmap; 66 struct mmap *overwrite_mmap; 67 struct evsel *selected; 68 struct events_stats stats; 69 struct perf_env *env; 70 void (*trace_event_sample_raw)(struct evlist *evlist, 71 union perf_event *event, 72 struct perf_sample *sample); 73 u64 first_sample_time; 74 u64 last_sample_time; 75 struct { 76 pthread_t th; 77 volatile int done; 78 } thread; 79 struct { 80 int fd; /* control file descriptor */ 81 int ack; /* ack file descriptor for control commands */ 82 int pos; /* index at evlist core object to check signals */ 83 } ctl_fd; 84 struct event_enable_timer *eet; 85 }; 86 87 struct evsel_str_handler { 88 const char *name; 89 void *handler; 90 }; 91 92 struct evlist *evlist__new(void); 93 struct evlist *evlist__new_default(void); 94 struct evlist *evlist__new_dummy(void); 95 void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, 96 struct perf_thread_map *threads); 97 void evlist__exit(struct evlist *evlist); 98 void evlist__delete(struct evlist *evlist); 99 100 void evlist__add(struct evlist *evlist, struct evsel *entry); 101 void evlist__remove(struct evlist *evlist, struct evsel *evsel); 102 103 int evlist__add_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs); 104 105 int __evlist__add_default_attrs(struct evlist *evlist, 106 struct perf_event_attr *attrs, size_t nr_attrs); 107 108 int arch_evlist__add_default_attrs(struct evlist *evlist, 109 struct perf_event_attr *attrs, 110 size_t nr_attrs); 111 112 #define evlist__add_default_attrs(evlist, array) \ 113 arch_evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array)) 114 115 int arch_evlist__cmp(const struct evsel *lhs, const struct evsel *rhs); 116 117 int evlist__add_dummy(struct evlist *evlist); 118 struct evsel *evlist__add_aux_dummy(struct evlist *evlist, bool system_wide); 119 static inline struct evsel *evlist__add_dummy_on_all_cpus(struct evlist *evlist) 120 { 121 return evlist__add_aux_dummy(evlist, true); 122 } 123 #ifdef HAVE_LIBTRACEEVENT 124 struct evsel *evlist__add_sched_switch(struct evlist *evlist, bool system_wide); 125 #endif 126 127 int evlist__add_sb_event(struct evlist *evlist, struct perf_event_attr *attr, 128 evsel__sb_cb_t cb, void *data); 129 void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data); 130 int evlist__start_sb_thread(struct evlist *evlist, struct target *target); 131 void evlist__stop_sb_thread(struct evlist *evlist); 132 133 #ifdef HAVE_LIBTRACEEVENT 134 int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler); 135 #endif 136 137 int __evlist__set_tracepoints_handlers(struct evlist *evlist, 138 const struct evsel_str_handler *assocs, 139 size_t nr_assocs); 140 141 #define evlist__set_tracepoints_handlers(evlist, array) \ 142 __evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array)) 143 144 int evlist__set_tp_filter(struct evlist *evlist, const char *filter); 145 int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid); 146 int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 147 148 int evlist__append_tp_filter(struct evlist *evlist, const char *filter); 149 150 int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid); 151 int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 152 153 struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id); 154 struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name); 155 156 int evlist__add_pollfd(struct evlist *evlist, int fd); 157 int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask); 158 159 #ifdef HAVE_EVENTFD_SUPPORT 160 int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd); 161 #endif 162 163 int evlist__poll(struct evlist *evlist, int timeout); 164 165 struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id); 166 struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id); 167 168 struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id); 169 170 void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state); 171 172 void evlist__mmap_consume(struct evlist *evlist, int idx); 173 174 int evlist__open(struct evlist *evlist); 175 void evlist__close(struct evlist *evlist); 176 177 struct callchain_param; 178 179 void evlist__set_id_pos(struct evlist *evlist); 180 void evlist__config(struct evlist *evlist, struct record_opts *opts, struct callchain_param *callchain); 181 int record_opts__config(struct record_opts *opts); 182 183 int evlist__prepare_workload(struct evlist *evlist, struct target *target, 184 const char *argv[], bool pipe_output, 185 void (*exec_error)(int signo, siginfo_t *info, void *ucontext)); 186 int evlist__start_workload(struct evlist *evlist); 187 188 struct option; 189 190 int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); 191 int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset); 192 193 unsigned long perf_event_mlock_kb_in_pages(void); 194 195 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, 196 unsigned int auxtrace_pages, 197 bool auxtrace_overwrite, int nr_cblocks, 198 int affinity, int flush, int comp_level); 199 int evlist__mmap(struct evlist *evlist, unsigned int pages); 200 void evlist__munmap(struct evlist *evlist); 201 202 size_t evlist__mmap_size(unsigned long pages); 203 204 void evlist__disable(struct evlist *evlist); 205 void evlist__enable(struct evlist *evlist); 206 void evlist__toggle_enable(struct evlist *evlist); 207 void evlist__disable_evsel(struct evlist *evlist, char *evsel_name); 208 void evlist__enable_evsel(struct evlist *evlist, char *evsel_name); 209 void evlist__disable_non_dummy(struct evlist *evlist); 210 void evlist__enable_non_dummy(struct evlist *evlist); 211 212 void evlist__set_selected(struct evlist *evlist, struct evsel *evsel); 213 214 int evlist__create_maps(struct evlist *evlist, struct target *target); 215 int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel); 216 217 u64 __evlist__combined_sample_type(struct evlist *evlist); 218 u64 evlist__combined_sample_type(struct evlist *evlist); 219 u64 evlist__combined_branch_type(struct evlist *evlist); 220 bool evlist__sample_id_all(struct evlist *evlist); 221 u16 evlist__id_hdr_size(struct evlist *evlist); 222 223 int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample); 224 int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp); 225 226 bool evlist__valid_sample_type(struct evlist *evlist); 227 bool evlist__valid_sample_id_all(struct evlist *evlist); 228 bool evlist__valid_read_format(struct evlist *evlist); 229 230 void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list); 231 232 static inline bool evlist__empty(struct evlist *evlist) 233 { 234 return list_empty(&evlist->core.entries); 235 } 236 237 static inline struct evsel *evlist__first(struct evlist *evlist) 238 { 239 struct perf_evsel *evsel = perf_evlist__first(&evlist->core); 240 241 return container_of(evsel, struct evsel, core); 242 } 243 244 static inline struct evsel *evlist__last(struct evlist *evlist) 245 { 246 struct perf_evsel *evsel = perf_evlist__last(&evlist->core); 247 248 return container_of(evsel, struct evsel, core); 249 } 250 251 static inline int evlist__nr_groups(struct evlist *evlist) 252 { 253 return perf_evlist__nr_groups(&evlist->core); 254 } 255 256 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size); 257 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size); 258 259 bool evlist__can_select_event(struct evlist *evlist, const char *str); 260 void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel); 261 262 /** 263 * __evlist__for_each_entry - iterate thru all the evsels 264 * @list: list_head instance to iterate 265 * @evsel: struct evsel iterator 266 */ 267 #define __evlist__for_each_entry(list, evsel) \ 268 list_for_each_entry(evsel, list, core.node) 269 270 /** 271 * evlist__for_each_entry - iterate thru all the evsels 272 * @evlist: evlist instance to iterate 273 * @evsel: struct evsel iterator 274 */ 275 #define evlist__for_each_entry(evlist, evsel) \ 276 __evlist__for_each_entry(&(evlist)->core.entries, evsel) 277 278 /** 279 * __evlist__for_each_entry_continue - continue iteration thru all the evsels 280 * @list: list_head instance to iterate 281 * @evsel: struct evsel iterator 282 */ 283 #define __evlist__for_each_entry_continue(list, evsel) \ 284 list_for_each_entry_continue(evsel, list, core.node) 285 286 /** 287 * evlist__for_each_entry_continue - continue iteration thru all the evsels 288 * @evlist: evlist instance to iterate 289 * @evsel: struct evsel iterator 290 */ 291 #define evlist__for_each_entry_continue(evlist, evsel) \ 292 __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel) 293 294 /** 295 * __evlist__for_each_entry_from - continue iteration from @evsel (included) 296 * @list: list_head instance to iterate 297 * @evsel: struct evsel iterator 298 */ 299 #define __evlist__for_each_entry_from(list, evsel) \ 300 list_for_each_entry_from(evsel, list, core.node) 301 302 /** 303 * evlist__for_each_entry_from - continue iteration from @evsel (included) 304 * @evlist: evlist instance to iterate 305 * @evsel: struct evsel iterator 306 */ 307 #define evlist__for_each_entry_from(evlist, evsel) \ 308 __evlist__for_each_entry_from(&(evlist)->core.entries, evsel) 309 310 /** 311 * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 312 * @list: list_head instance to iterate 313 * @evsel: struct evsel iterator 314 */ 315 #define __evlist__for_each_entry_reverse(list, evsel) \ 316 list_for_each_entry_reverse(evsel, list, core.node) 317 318 /** 319 * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 320 * @evlist: evlist instance to iterate 321 * @evsel: struct evsel iterator 322 */ 323 #define evlist__for_each_entry_reverse(evlist, evsel) \ 324 __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel) 325 326 /** 327 * __evlist__for_each_entry_safe - safely iterate thru all the evsels 328 * @list: list_head instance to iterate 329 * @tmp: struct evsel temp iterator 330 * @evsel: struct evsel iterator 331 */ 332 #define __evlist__for_each_entry_safe(list, tmp, evsel) \ 333 list_for_each_entry_safe(evsel, tmp, list, core.node) 334 335 /** 336 * evlist__for_each_entry_safe - safely iterate thru all the evsels 337 * @evlist: evlist instance to iterate 338 * @evsel: struct evsel iterator 339 * @tmp: struct evsel temp iterator 340 */ 341 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \ 342 __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel) 343 344 /** Iterator state for evlist__for_each_cpu */ 345 struct evlist_cpu_iterator { 346 /** The list being iterated through. */ 347 struct evlist *container; 348 /** The current evsel of the iterator. */ 349 struct evsel *evsel; 350 /** The CPU map index corresponding to the evsel->core.cpus for the current CPU. */ 351 int cpu_map_idx; 352 /** 353 * The CPU map index corresponding to evlist->core.all_cpus for the 354 * current CPU. Distinct from cpu_map_idx as the evsel's cpu map may 355 * contain fewer entries. 356 */ 357 int evlist_cpu_map_idx; 358 /** The number of CPU map entries in evlist->core.all_cpus. */ 359 int evlist_cpu_map_nr; 360 /** The current CPU of the iterator. */ 361 struct perf_cpu cpu; 362 /** If present, used to set the affinity when switching between CPUs. */ 363 struct affinity *affinity; 364 }; 365 366 /** 367 * evlist__for_each_cpu - without affinity, iterate over the evlist. With 368 * affinity, iterate over all CPUs and then the evlist 369 * for each evsel on that CPU. When switching between 370 * CPUs the affinity is set to the CPU to avoid IPIs 371 * during syscalls. 372 * @evlist_cpu_itr: the iterator instance. 373 * @evlist: evlist instance to iterate. 374 * @affinity: NULL or used to set the affinity to the current CPU. 375 */ 376 #define evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) \ 377 for ((evlist_cpu_itr) = evlist__cpu_begin(evlist, affinity); \ 378 !evlist_cpu_iterator__end(&evlist_cpu_itr); \ 379 evlist_cpu_iterator__next(&evlist_cpu_itr)) 380 381 /** Returns an iterator set to the first CPU/evsel of evlist. */ 382 struct evlist_cpu_iterator evlist__cpu_begin(struct evlist *evlist, struct affinity *affinity); 383 /** Move to next element in iterator, updating CPU, evsel and the affinity. */ 384 void evlist_cpu_iterator__next(struct evlist_cpu_iterator *evlist_cpu_itr); 385 /** Returns true when iterator is at the end of the CPUs and evlist. */ 386 bool evlist_cpu_iterator__end(const struct evlist_cpu_iterator *evlist_cpu_itr); 387 388 struct evsel *evlist__get_tracking_event(struct evlist *evlist); 389 void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel); 390 391 struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str); 392 393 struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event); 394 395 bool evlist__exclude_kernel(struct evlist *evlist); 396 397 void evlist__force_leader(struct evlist *evlist); 398 399 struct evsel *evlist__reset_weak_group(struct evlist *evlist, struct evsel *evsel, bool close); 400 401 #define EVLIST_CTL_CMD_ENABLE_TAG "enable" 402 #define EVLIST_CTL_CMD_DISABLE_TAG "disable" 403 #define EVLIST_CTL_CMD_ACK_TAG "ack\n" 404 #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot" 405 #define EVLIST_CTL_CMD_EVLIST_TAG "evlist" 406 #define EVLIST_CTL_CMD_STOP_TAG "stop" 407 #define EVLIST_CTL_CMD_PING_TAG "ping" 408 409 #define EVLIST_CTL_CMD_MAX_LEN 64 410 411 enum evlist_ctl_cmd { 412 EVLIST_CTL_CMD_UNSUPPORTED = 0, 413 EVLIST_CTL_CMD_ENABLE, 414 EVLIST_CTL_CMD_DISABLE, 415 EVLIST_CTL_CMD_ACK, 416 EVLIST_CTL_CMD_SNAPSHOT, 417 EVLIST_CTL_CMD_EVLIST, 418 EVLIST_CTL_CMD_STOP, 419 EVLIST_CTL_CMD_PING, 420 }; 421 422 int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close); 423 void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close); 424 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); 425 int evlist__finalize_ctlfd(struct evlist *evlist); 426 bool evlist__ctlfd_initialized(struct evlist *evlist); 427 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); 428 int evlist__ctlfd_ack(struct evlist *evlist); 429 430 #define EVLIST_ENABLED_MSG "Events enabled\n" 431 #define EVLIST_DISABLED_MSG "Events disabled\n" 432 433 int evlist__parse_event_enable_time(struct evlist *evlist, struct record_opts *opts, 434 const char *str, int unset); 435 int event_enable_timer__start(struct event_enable_timer *eet); 436 void event_enable_timer__exit(struct event_enable_timer **ep); 437 int event_enable_timer__process(struct event_enable_timer *eet); 438 439 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx); 440 441 int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf); 442 void evlist__check_mem_load_aux(struct evlist *evlist); 443 void evlist__warn_user_requested_cpus(struct evlist *evlist, const char *cpu_list); 444 445 #endif /* __PERF_EVLIST_H */ 446