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 struct target; 24 25 /* 26 * State machine of bkw_mmap_state: 27 * 28 * .________________(forbid)_____________. 29 * | V 30 * NOTREADY --(0)--> RUNNING --(1)--> DATA_PENDING --(2)--> EMPTY 31 * ^ ^ | ^ | 32 * | |__(forbid)____/ |___(forbid)___/| 33 * | | 34 * \_________________(3)_______________/ 35 * 36 * NOTREADY : Backward ring buffers are not ready 37 * RUNNING : Backward ring buffers are recording 38 * DATA_PENDING : We are required to collect data from backward ring buffers 39 * EMPTY : We have collected data from backward ring buffers. 40 * 41 * (0): Setup backward ring buffer 42 * (1): Pause ring buffers for reading 43 * (2): Read from ring buffers 44 * (3): Resume ring buffers for recording 45 */ 46 enum bkw_mmap_state { 47 BKW_MMAP_NOTREADY, 48 BKW_MMAP_RUNNING, 49 BKW_MMAP_DATA_PENDING, 50 BKW_MMAP_EMPTY, 51 }; 52 53 struct event_enable_timer; 54 55 struct evlist { 56 struct perf_evlist core; 57 bool enabled; 58 int id_pos; 59 int is_pos; 60 u64 combined_sample_type; 61 enum bkw_mmap_state bkw_mmap_state; 62 struct { 63 int cork_fd; 64 pid_t pid; 65 } workload; 66 struct mmap *mmap; 67 struct mmap *overwrite_mmap; 68 struct evsel *selected; 69 struct events_stats stats; 70 struct perf_env *env; 71 void (*trace_event_sample_raw)(struct evlist *evlist, 72 union perf_event *event, 73 struct perf_sample *sample); 74 u64 first_sample_time; 75 u64 last_sample_time; 76 struct { 77 pthread_t th; 78 volatile int done; 79 } thread; 80 struct { 81 int fd; /* control file descriptor */ 82 int ack; /* ack file descriptor for control commands */ 83 int pos; /* index at evlist core object to check signals */ 84 } ctl_fd; 85 struct event_enable_timer *eet; 86 }; 87 88 struct evsel_str_handler { 89 const char *name; 90 void *handler; 91 }; 92 93 struct evlist *evlist__new(void); 94 struct evlist *evlist__new_default(void); 95 struct evlist *evlist__new_dummy(void); 96 void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, 97 struct perf_thread_map *threads); 98 void evlist__exit(struct evlist *evlist); 99 void evlist__delete(struct evlist *evlist); 100 101 void evlist__add(struct evlist *evlist, struct evsel *entry); 102 void evlist__remove(struct evlist *evlist, struct evsel *evsel); 103 104 int evlist__add_attrs(struct evlist *evlist, struct perf_event_attr *attrs, size_t nr_attrs); 105 106 int __evlist__add_default_attrs(struct evlist *evlist, 107 struct perf_event_attr *attrs, size_t nr_attrs); 108 109 int arch_evlist__add_default_attrs(struct evlist *evlist, 110 struct perf_event_attr *attrs, 111 size_t nr_attrs); 112 113 #define evlist__add_default_attrs(evlist, array) \ 114 arch_evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array)) 115 116 int arch_evlist__cmp(const struct evsel *lhs, const struct evsel *rhs); 117 118 int evlist__add_dummy(struct evlist *evlist); 119 struct evsel *evlist__add_aux_dummy(struct evlist *evlist, bool system_wide); 120 static inline struct evsel *evlist__add_dummy_on_all_cpus(struct evlist *evlist) 121 { 122 return evlist__add_aux_dummy(evlist, true); 123 } 124 #ifdef HAVE_LIBTRACEEVENT 125 struct evsel *evlist__add_sched_switch(struct evlist *evlist, bool system_wide); 126 #endif 127 128 int evlist__add_sb_event(struct evlist *evlist, struct perf_event_attr *attr, 129 evsel__sb_cb_t cb, void *data); 130 void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data); 131 int evlist__start_sb_thread(struct evlist *evlist, struct target *target); 132 void evlist__stop_sb_thread(struct evlist *evlist); 133 134 #ifdef HAVE_LIBTRACEEVENT 135 int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler); 136 #endif 137 138 int __evlist__set_tracepoints_handlers(struct evlist *evlist, 139 const struct evsel_str_handler *assocs, 140 size_t nr_assocs); 141 142 #define evlist__set_tracepoints_handlers(evlist, array) \ 143 __evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array)) 144 145 int evlist__set_tp_filter(struct evlist *evlist, const char *filter); 146 int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid); 147 int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 148 149 int evlist__append_tp_filter(struct evlist *evlist, const char *filter); 150 151 int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid); 152 int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 153 154 struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id); 155 struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name); 156 157 int evlist__add_pollfd(struct evlist *evlist, int fd); 158 int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask); 159 160 #ifdef HAVE_EVENTFD_SUPPORT 161 int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd); 162 #endif 163 164 int evlist__poll(struct evlist *evlist, int timeout); 165 166 struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id); 167 struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id); 168 169 struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id); 170 171 void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state); 172 173 void evlist__mmap_consume(struct evlist *evlist, int idx); 174 175 int evlist__open(struct evlist *evlist); 176 void evlist__close(struct evlist *evlist); 177 178 struct callchain_param; 179 180 void evlist__set_id_pos(struct evlist *evlist); 181 void evlist__config(struct evlist *evlist, struct record_opts *opts, struct callchain_param *callchain); 182 int record_opts__config(struct record_opts *opts); 183 184 int evlist__prepare_workload(struct evlist *evlist, struct target *target, 185 const char *argv[], bool pipe_output, 186 void (*exec_error)(int signo, siginfo_t *info, void *ucontext)); 187 int evlist__start_workload(struct evlist *evlist); 188 189 struct option; 190 191 int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); 192 int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset); 193 194 unsigned long perf_event_mlock_kb_in_pages(void); 195 196 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, 197 unsigned int auxtrace_pages, 198 bool auxtrace_overwrite, int nr_cblocks, 199 int affinity, int flush, int comp_level); 200 int evlist__mmap(struct evlist *evlist, unsigned int pages); 201 void evlist__munmap(struct evlist *evlist); 202 203 size_t evlist__mmap_size(unsigned long pages); 204 205 void evlist__disable(struct evlist *evlist); 206 void evlist__enable(struct evlist *evlist); 207 void evlist__toggle_enable(struct evlist *evlist); 208 void evlist__disable_evsel(struct evlist *evlist, char *evsel_name); 209 void evlist__enable_evsel(struct evlist *evlist, char *evsel_name); 210 void evlist__disable_non_dummy(struct evlist *evlist); 211 void evlist__enable_non_dummy(struct evlist *evlist); 212 213 void evlist__set_selected(struct evlist *evlist, struct evsel *evsel); 214 215 int evlist__create_maps(struct evlist *evlist, struct target *target); 216 int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel, 217 struct target *target); 218 219 u64 __evlist__combined_sample_type(struct evlist *evlist); 220 u64 evlist__combined_sample_type(struct evlist *evlist); 221 u64 evlist__combined_branch_type(struct evlist *evlist); 222 bool evlist__sample_id_all(struct evlist *evlist); 223 u16 evlist__id_hdr_size(struct evlist *evlist); 224 225 int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample); 226 int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp); 227 228 bool evlist__valid_sample_type(struct evlist *evlist); 229 bool evlist__valid_sample_id_all(struct evlist *evlist); 230 bool evlist__valid_read_format(struct evlist *evlist); 231 232 void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list); 233 234 static inline bool evlist__empty(struct evlist *evlist) 235 { 236 return list_empty(&evlist->core.entries); 237 } 238 239 static inline struct evsel *evlist__first(struct evlist *evlist) 240 { 241 struct perf_evsel *evsel = perf_evlist__first(&evlist->core); 242 243 return container_of(evsel, struct evsel, core); 244 } 245 246 static inline struct evsel *evlist__last(struct evlist *evlist) 247 { 248 struct perf_evsel *evsel = perf_evlist__last(&evlist->core); 249 250 return container_of(evsel, struct evsel, core); 251 } 252 253 static inline int evlist__nr_groups(struct evlist *evlist) 254 { 255 return perf_evlist__nr_groups(&evlist->core); 256 } 257 258 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size); 259 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size); 260 261 bool evlist__can_select_event(struct evlist *evlist, const char *str); 262 void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel); 263 264 /** 265 * __evlist__for_each_entry - iterate thru all the evsels 266 * @list: list_head instance to iterate 267 * @evsel: struct evsel iterator 268 */ 269 #define __evlist__for_each_entry(list, evsel) \ 270 list_for_each_entry(evsel, list, core.node) 271 272 /** 273 * evlist__for_each_entry - iterate thru all the evsels 274 * @evlist: evlist instance to iterate 275 * @evsel: struct evsel iterator 276 */ 277 #define evlist__for_each_entry(evlist, evsel) \ 278 __evlist__for_each_entry(&(evlist)->core.entries, evsel) 279 280 /** 281 * __evlist__for_each_entry_continue - continue iteration thru all the evsels 282 * @list: list_head instance to iterate 283 * @evsel: struct evsel iterator 284 */ 285 #define __evlist__for_each_entry_continue(list, evsel) \ 286 list_for_each_entry_continue(evsel, list, core.node) 287 288 /** 289 * evlist__for_each_entry_continue - continue iteration thru all the evsels 290 * @evlist: evlist instance to iterate 291 * @evsel: struct evsel iterator 292 */ 293 #define evlist__for_each_entry_continue(evlist, evsel) \ 294 __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel) 295 296 /** 297 * __evlist__for_each_entry_from - continue iteration from @evsel (included) 298 * @list: list_head instance to iterate 299 * @evsel: struct evsel iterator 300 */ 301 #define __evlist__for_each_entry_from(list, evsel) \ 302 list_for_each_entry_from(evsel, list, core.node) 303 304 /** 305 * evlist__for_each_entry_from - continue iteration from @evsel (included) 306 * @evlist: evlist instance to iterate 307 * @evsel: struct evsel iterator 308 */ 309 #define evlist__for_each_entry_from(evlist, evsel) \ 310 __evlist__for_each_entry_from(&(evlist)->core.entries, evsel) 311 312 /** 313 * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 314 * @list: list_head instance to iterate 315 * @evsel: struct evsel iterator 316 */ 317 #define __evlist__for_each_entry_reverse(list, evsel) \ 318 list_for_each_entry_reverse(evsel, list, core.node) 319 320 /** 321 * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 322 * @evlist: evlist instance to iterate 323 * @evsel: struct evsel iterator 324 */ 325 #define evlist__for_each_entry_reverse(evlist, evsel) \ 326 __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel) 327 328 /** 329 * __evlist__for_each_entry_safe - safely iterate thru all the evsels 330 * @list: list_head instance to iterate 331 * @tmp: struct evsel temp iterator 332 * @evsel: struct evsel iterator 333 */ 334 #define __evlist__for_each_entry_safe(list, tmp, evsel) \ 335 list_for_each_entry_safe(evsel, tmp, list, core.node) 336 337 /** 338 * evlist__for_each_entry_safe - safely iterate thru all the evsels 339 * @evlist: evlist instance to iterate 340 * @evsel: struct evsel iterator 341 * @tmp: struct evsel temp iterator 342 */ 343 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \ 344 __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel) 345 346 /** Iterator state for evlist__for_each_cpu */ 347 struct evlist_cpu_iterator { 348 /** The list being iterated through. */ 349 struct evlist *container; 350 /** The current evsel of the iterator. */ 351 struct evsel *evsel; 352 /** The CPU map index corresponding to the evsel->core.cpus for the current CPU. */ 353 int cpu_map_idx; 354 /** 355 * The CPU map index corresponding to evlist->core.all_cpus for the 356 * current CPU. Distinct from cpu_map_idx as the evsel's cpu map may 357 * contain fewer entries. 358 */ 359 int evlist_cpu_map_idx; 360 /** The number of CPU map entries in evlist->core.all_cpus. */ 361 int evlist_cpu_map_nr; 362 /** The current CPU of the iterator. */ 363 struct perf_cpu cpu; 364 /** If present, used to set the affinity when switching between CPUs. */ 365 struct affinity *affinity; 366 }; 367 368 /** 369 * evlist__for_each_cpu - without affinity, iterate over the evlist. With 370 * affinity, iterate over all CPUs and then the evlist 371 * for each evsel on that CPU. When switching between 372 * CPUs the affinity is set to the CPU to avoid IPIs 373 * during syscalls. 374 * @evlist_cpu_itr: the iterator instance. 375 * @evlist: evlist instance to iterate. 376 * @affinity: NULL or used to set the affinity to the current CPU. 377 */ 378 #define evlist__for_each_cpu(evlist_cpu_itr, evlist, affinity) \ 379 for ((evlist_cpu_itr) = evlist__cpu_begin(evlist, affinity); \ 380 !evlist_cpu_iterator__end(&evlist_cpu_itr); \ 381 evlist_cpu_iterator__next(&evlist_cpu_itr)) 382 383 /** Returns an iterator set to the first CPU/evsel of evlist. */ 384 struct evlist_cpu_iterator evlist__cpu_begin(struct evlist *evlist, struct affinity *affinity); 385 /** Move to next element in iterator, updating CPU, evsel and the affinity. */ 386 void evlist_cpu_iterator__next(struct evlist_cpu_iterator *evlist_cpu_itr); 387 /** Returns true when iterator is at the end of the CPUs and evlist. */ 388 bool evlist_cpu_iterator__end(const struct evlist_cpu_iterator *evlist_cpu_itr); 389 390 struct evsel *evlist__get_tracking_event(struct evlist *evlist); 391 void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel); 392 struct evsel *evlist__findnew_tracking_event(struct evlist *evlist, bool system_wide); 393 394 struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str); 395 396 struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event); 397 398 bool evlist__exclude_kernel(struct evlist *evlist); 399 400 void evlist__force_leader(struct evlist *evlist); 401 402 struct evsel *evlist__reset_weak_group(struct evlist *evlist, struct evsel *evsel, bool close); 403 404 #define EVLIST_CTL_CMD_ENABLE_TAG "enable" 405 #define EVLIST_CTL_CMD_DISABLE_TAG "disable" 406 #define EVLIST_CTL_CMD_ACK_TAG "ack\n" 407 #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot" 408 #define EVLIST_CTL_CMD_EVLIST_TAG "evlist" 409 #define EVLIST_CTL_CMD_STOP_TAG "stop" 410 #define EVLIST_CTL_CMD_PING_TAG "ping" 411 412 #define EVLIST_CTL_CMD_MAX_LEN 64 413 414 enum evlist_ctl_cmd { 415 EVLIST_CTL_CMD_UNSUPPORTED = 0, 416 EVLIST_CTL_CMD_ENABLE, 417 EVLIST_CTL_CMD_DISABLE, 418 EVLIST_CTL_CMD_ACK, 419 EVLIST_CTL_CMD_SNAPSHOT, 420 EVLIST_CTL_CMD_EVLIST, 421 EVLIST_CTL_CMD_STOP, 422 EVLIST_CTL_CMD_PING, 423 }; 424 425 int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close); 426 void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close); 427 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); 428 int evlist__finalize_ctlfd(struct evlist *evlist); 429 bool evlist__ctlfd_initialized(struct evlist *evlist); 430 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); 431 int evlist__ctlfd_ack(struct evlist *evlist); 432 433 #define EVLIST_ENABLED_MSG "Events enabled\n" 434 #define EVLIST_DISABLED_MSG "Events disabled\n" 435 436 int evlist__parse_event_enable_time(struct evlist *evlist, struct record_opts *opts, 437 const char *str, int unset); 438 int event_enable_timer__start(struct event_enable_timer *eet); 439 void event_enable_timer__exit(struct event_enable_timer **ep); 440 int event_enable_timer__process(struct event_enable_timer *eet); 441 442 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx); 443 444 int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf); 445 void evlist__check_mem_load_aux(struct evlist *evlist); 446 void evlist__warn_user_requested_cpus(struct evlist *evlist, const char *cpu_list); 447 void evlist__uniquify_name(struct evlist *evlist); 448 449 #endif /* __PERF_EVLIST_H */ 450