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 "events_stats.h" 13 #include "evsel.h" 14 #include <pthread.h> 15 #include <signal.h> 16 #include <unistd.h> 17 18 struct pollfd; 19 struct thread_map; 20 struct perf_cpu_map; 21 struct record_opts; 22 23 /* 24 * State machine of bkw_mmap_state: 25 * 26 * .________________(forbid)_____________. 27 * | V 28 * NOTREADY --(0)--> RUNNING --(1)--> DATA_PENDING --(2)--> EMPTY 29 * ^ ^ | ^ | 30 * | |__(forbid)____/ |___(forbid)___/| 31 * | | 32 * \_________________(3)_______________/ 33 * 34 * NOTREADY : Backward ring buffers are not ready 35 * RUNNING : Backward ring buffers are recording 36 * DATA_PENDING : We are required to collect data from backward ring buffers 37 * EMPTY : We have collected data from backward ring buffers. 38 * 39 * (0): Setup backward ring buffer 40 * (1): Pause ring buffers for reading 41 * (2): Read from ring buffers 42 * (3): Resume ring buffers for recording 43 */ 44 enum bkw_mmap_state { 45 BKW_MMAP_NOTREADY, 46 BKW_MMAP_RUNNING, 47 BKW_MMAP_DATA_PENDING, 48 BKW_MMAP_EMPTY, 49 }; 50 51 struct evlist { 52 struct perf_evlist core; 53 int nr_groups; 54 bool enabled; 55 int id_pos; 56 int is_pos; 57 u64 combined_sample_type; 58 enum bkw_mmap_state bkw_mmap_state; 59 struct { 60 int cork_fd; 61 pid_t pid; 62 } workload; 63 struct mmap *mmap; 64 struct mmap *overwrite_mmap; 65 struct evsel *selected; 66 struct events_stats stats; 67 struct perf_env *env; 68 void (*trace_event_sample_raw)(struct evlist *evlist, 69 union perf_event *event, 70 struct perf_sample *sample); 71 u64 first_sample_time; 72 u64 last_sample_time; 73 struct { 74 pthread_t th; 75 volatile int done; 76 } thread; 77 struct { 78 int fd; /* control file descriptor */ 79 int ack; /* ack file descriptor for control commands */ 80 int pos; /* index at evlist core object to check signals */ 81 } ctl_fd; 82 }; 83 84 struct evsel_str_handler { 85 const char *name; 86 void *handler; 87 }; 88 89 struct evlist *evlist__new(void); 90 struct evlist *perf_evlist__new_default(void); 91 struct evlist *perf_evlist__new_dummy(void); 92 void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, 93 struct perf_thread_map *threads); 94 void evlist__exit(struct evlist *evlist); 95 void evlist__delete(struct evlist *evlist); 96 97 void evlist__add(struct evlist *evlist, struct evsel *entry); 98 void evlist__remove(struct evlist *evlist, struct evsel *evsel); 99 100 int __evlist__add_default(struct evlist *evlist, bool precise); 101 102 static inline int evlist__add_default(struct evlist *evlist) 103 { 104 return __evlist__add_default(evlist, true); 105 } 106 107 int __evlist__add_default_attrs(struct evlist *evlist, 108 struct perf_event_attr *attrs, size_t nr_attrs); 109 110 #define evlist__add_default_attrs(evlist, array) \ 111 __evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array)) 112 113 int evlist__add_dummy(struct evlist *evlist); 114 115 int perf_evlist__add_sb_event(struct evlist *evlist, 116 struct perf_event_attr *attr, 117 evsel__sb_cb_t cb, 118 void *data); 119 void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data); 120 int perf_evlist__start_sb_thread(struct evlist *evlist, 121 struct target *target); 122 void perf_evlist__stop_sb_thread(struct evlist *evlist); 123 124 int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler); 125 126 int __evlist__set_tracepoints_handlers(struct evlist *evlist, 127 const struct evsel_str_handler *assocs, 128 size_t nr_assocs); 129 130 #define evlist__set_tracepoints_handlers(evlist, array) \ 131 __evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array)) 132 133 void __perf_evlist__set_sample_bit(struct evlist *evlist, 134 enum perf_event_sample_format bit); 135 void __perf_evlist__reset_sample_bit(struct evlist *evlist, 136 enum perf_event_sample_format bit); 137 138 #define perf_evlist__set_sample_bit(evlist, bit) \ 139 __perf_evlist__set_sample_bit(evlist, PERF_SAMPLE_##bit) 140 141 #define perf_evlist__reset_sample_bit(evlist, bit) \ 142 __perf_evlist__reset_sample_bit(evlist, PERF_SAMPLE_##bit) 143 144 int perf_evlist__set_tp_filter(struct evlist *evlist, const char *filter); 145 int perf_evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid); 146 int perf_evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 147 148 int perf_evlist__append_tp_filter(struct evlist *evlist, const char *filter); 149 150 int perf_evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid); 151 int perf_evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 152 153 struct evsel * 154 perf_evlist__find_tracepoint_by_id(struct evlist *evlist, int id); 155 156 struct evsel * 157 perf_evlist__find_tracepoint_by_name(struct evlist *evlist, 158 const char *name); 159 160 int evlist__add_pollfd(struct evlist *evlist, int fd); 161 int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask); 162 163 int evlist__poll(struct evlist *evlist, int timeout); 164 165 struct evsel *perf_evlist__id2evsel(struct evlist *evlist, u64 id); 166 struct evsel *perf_evlist__id2evsel_strict(struct evlist *evlist, 167 u64 id); 168 169 struct perf_sample_id *perf_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 perf_evlist__set_id_pos(struct evlist *evlist); 181 void perf_evlist__config(struct evlist *evlist, struct record_opts *opts, 182 struct callchain_param *callchain); 183 int record_opts__config(struct record_opts *opts); 184 185 int evlist__prepare_workload(struct evlist *evlist, struct target *target, 186 const char *argv[], bool pipe_output, 187 void (*exec_error)(int signo, siginfo_t *info, void *ucontext)); 188 int evlist__start_workload(struct evlist *evlist); 189 190 struct option; 191 192 int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); 193 int perf_evlist__parse_mmap_pages(const struct option *opt, 194 const char *str, 195 int unset); 196 197 unsigned long perf_event_mlock_kb_in_pages(void); 198 199 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, 200 unsigned int auxtrace_pages, 201 bool auxtrace_overwrite, int nr_cblocks, 202 int affinity, int flush, int comp_level); 203 int evlist__mmap(struct evlist *evlist, unsigned int pages); 204 void evlist__munmap(struct evlist *evlist); 205 206 size_t evlist__mmap_size(unsigned long pages); 207 208 void evlist__disable(struct evlist *evlist); 209 void evlist__enable(struct evlist *evlist); 210 void evlist__toggle_enable(struct evlist *evlist); 211 212 int perf_evlist__enable_event_idx(struct evlist *evlist, 213 struct evsel *evsel, int idx); 214 215 void perf_evlist__set_selected(struct evlist *evlist, 216 struct evsel *evsel); 217 218 int perf_evlist__create_maps(struct evlist *evlist, struct target *target); 219 int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel); 220 221 void __evlist__set_leader(struct list_head *list); 222 void evlist__set_leader(struct evlist *evlist); 223 224 u64 __evlist__combined_sample_type(struct evlist *evlist); 225 u64 evlist__combined_sample_type(struct evlist *evlist); 226 u64 evlist__combined_branch_type(struct evlist *evlist); 227 bool evlist__sample_id_all(struct evlist *evlist); 228 u16 perf_evlist__id_hdr_size(struct evlist *evlist); 229 230 int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event, 231 struct perf_sample *sample); 232 233 int perf_evlist__parse_sample_timestamp(struct evlist *evlist, 234 union perf_event *event, 235 u64 *timestamp); 236 237 bool evlist__valid_sample_type(struct evlist *evlist); 238 bool evlist__valid_sample_id_all(struct evlist *evlist); 239 bool perf_evlist__valid_read_format(struct evlist *evlist); 240 241 void perf_evlist__splice_list_tail(struct evlist *evlist, 242 struct list_head *list); 243 244 static inline bool perf_evlist__empty(struct evlist *evlist) 245 { 246 return list_empty(&evlist->core.entries); 247 } 248 249 static inline struct evsel *evlist__first(struct evlist *evlist) 250 { 251 struct perf_evsel *evsel = perf_evlist__first(&evlist->core); 252 253 return container_of(evsel, struct evsel, core); 254 } 255 256 static inline struct evsel *evlist__last(struct evlist *evlist) 257 { 258 struct perf_evsel *evsel = perf_evlist__last(&evlist->core); 259 260 return container_of(evsel, struct evsel, core); 261 } 262 263 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size); 264 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size); 265 266 bool perf_evlist__can_select_event(struct evlist *evlist, const char *str); 267 void perf_evlist__to_front(struct evlist *evlist, 268 struct evsel *move_evsel); 269 270 /** 271 * __evlist__for_each_entry - iterate thru all the evsels 272 * @list: list_head instance to iterate 273 * @evsel: struct evsel iterator 274 */ 275 #define __evlist__for_each_entry(list, evsel) \ 276 list_for_each_entry(evsel, list, core.node) 277 278 /** 279 * evlist__for_each_entry - iterate thru all the evsels 280 * @evlist: evlist instance to iterate 281 * @evsel: struct evsel iterator 282 */ 283 #define evlist__for_each_entry(evlist, evsel) \ 284 __evlist__for_each_entry(&(evlist)->core.entries, evsel) 285 286 /** 287 * __evlist__for_each_entry_continue - continue iteration thru all the evsels 288 * @list: list_head instance to iterate 289 * @evsel: struct evsel iterator 290 */ 291 #define __evlist__for_each_entry_continue(list, evsel) \ 292 list_for_each_entry_continue(evsel, list, core.node) 293 294 /** 295 * evlist__for_each_entry_continue - continue iteration thru all the evsels 296 * @evlist: evlist instance to iterate 297 * @evsel: struct evsel iterator 298 */ 299 #define evlist__for_each_entry_continue(evlist, evsel) \ 300 __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel) 301 302 /** 303 * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 304 * @list: list_head instance to iterate 305 * @evsel: struct evsel iterator 306 */ 307 #define __evlist__for_each_entry_reverse(list, evsel) \ 308 list_for_each_entry_reverse(evsel, list, core.node) 309 310 /** 311 * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 312 * @evlist: evlist instance to iterate 313 * @evsel: struct evsel iterator 314 */ 315 #define evlist__for_each_entry_reverse(evlist, evsel) \ 316 __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel) 317 318 /** 319 * __evlist__for_each_entry_safe - safely iterate thru all the evsels 320 * @list: list_head instance to iterate 321 * @tmp: struct evsel temp iterator 322 * @evsel: struct evsel iterator 323 */ 324 #define __evlist__for_each_entry_safe(list, tmp, evsel) \ 325 list_for_each_entry_safe(evsel, tmp, list, core.node) 326 327 /** 328 * evlist__for_each_entry_safe - safely iterate thru all the evsels 329 * @evlist: evlist instance to iterate 330 * @evsel: struct evsel iterator 331 * @tmp: struct evsel temp iterator 332 */ 333 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \ 334 __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel) 335 336 #define evlist__for_each_cpu(evlist, index, cpu) \ 337 evlist__cpu_iter_start(evlist); \ 338 perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus) 339 340 struct evsel *perf_evlist__get_tracking_event(struct evlist *evlist); 341 void perf_evlist__set_tracking_event(struct evlist *evlist, 342 struct evsel *tracking_evsel); 343 344 void evlist__cpu_iter_start(struct evlist *evlist); 345 bool evsel__cpu_iter_skip(struct evsel *ev, int cpu); 346 bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu); 347 348 struct evsel * 349 perf_evlist__find_evsel_by_str(struct evlist *evlist, const char *str); 350 351 struct evsel *perf_evlist__event2evsel(struct evlist *evlist, 352 union perf_event *event); 353 354 bool perf_evlist__exclude_kernel(struct evlist *evlist); 355 356 void perf_evlist__force_leader(struct evlist *evlist); 357 358 struct evsel *perf_evlist__reset_weak_group(struct evlist *evlist, 359 struct evsel *evsel, 360 bool close); 361 #define EVLIST_CTL_CMD_ENABLE_TAG "enable" 362 #define EVLIST_CTL_CMD_DISABLE_TAG "disable" 363 #define EVLIST_CTL_CMD_ACK_TAG "ack\n" 364 #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot" 365 366 #define EVLIST_CTL_CMD_MAX_LEN 64 367 368 enum evlist_ctl_cmd { 369 EVLIST_CTL_CMD_UNSUPPORTED = 0, 370 EVLIST_CTL_CMD_ENABLE, 371 EVLIST_CTL_CMD_DISABLE, 372 EVLIST_CTL_CMD_ACK, 373 EVLIST_CTL_CMD_SNAPSHOT, 374 }; 375 376 int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close); 377 void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close); 378 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); 379 int evlist__finalize_ctlfd(struct evlist *evlist); 380 bool evlist__ctlfd_initialized(struct evlist *evlist); 381 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); 382 int evlist__ctlfd_ack(struct evlist *evlist); 383 384 #define EVLIST_ENABLED_MSG "Events enabled\n" 385 #define EVLIST_DISABLED_MSG "Events disabled\n" 386 387 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx); 388 #endif /* __PERF_EVLIST_H */ 389