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 perf_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 perf_evlist__prepare_workload(struct evlist *evlist, 186 struct target *target, 187 const char *argv[], bool pipe_output, 188 void (*exec_error)(int signo, siginfo_t *info, 189 void *ucontext)); 190 int perf_evlist__start_workload(struct evlist *evlist); 191 192 struct option; 193 194 int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); 195 int perf_evlist__parse_mmap_pages(const struct option *opt, 196 const char *str, 197 int unset); 198 199 unsigned long perf_event_mlock_kb_in_pages(void); 200 201 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, 202 unsigned int auxtrace_pages, 203 bool auxtrace_overwrite, int nr_cblocks, 204 int affinity, int flush, int comp_level); 205 int evlist__mmap(struct evlist *evlist, unsigned int pages); 206 void evlist__munmap(struct evlist *evlist); 207 208 size_t evlist__mmap_size(unsigned long pages); 209 210 void evlist__disable(struct evlist *evlist); 211 void evlist__enable(struct evlist *evlist); 212 void perf_evlist__toggle_enable(struct evlist *evlist); 213 214 int perf_evlist__enable_event_idx(struct evlist *evlist, 215 struct evsel *evsel, int idx); 216 217 void perf_evlist__set_selected(struct evlist *evlist, 218 struct evsel *evsel); 219 220 int perf_evlist__create_maps(struct evlist *evlist, struct target *target); 221 int perf_evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel); 222 223 void __perf_evlist__set_leader(struct list_head *list); 224 void perf_evlist__set_leader(struct evlist *evlist); 225 226 u64 __evlist__combined_sample_type(struct evlist *evlist); 227 u64 evlist__combined_sample_type(struct evlist *evlist); 228 u64 evlist__combined_branch_type(struct evlist *evlist); 229 bool evlist__sample_id_all(struct evlist *evlist); 230 u16 perf_evlist__id_hdr_size(struct evlist *evlist); 231 232 int perf_evlist__parse_sample(struct evlist *evlist, union perf_event *event, 233 struct perf_sample *sample); 234 235 int perf_evlist__parse_sample_timestamp(struct evlist *evlist, 236 union perf_event *event, 237 u64 *timestamp); 238 239 bool evlist__valid_sample_type(struct evlist *evlist); 240 bool evlist__valid_sample_id_all(struct evlist *evlist); 241 bool perf_evlist__valid_read_format(struct evlist *evlist); 242 243 void perf_evlist__splice_list_tail(struct evlist *evlist, 244 struct list_head *list); 245 246 static inline bool perf_evlist__empty(struct evlist *evlist) 247 { 248 return list_empty(&evlist->core.entries); 249 } 250 251 static inline struct evsel *evlist__first(struct evlist *evlist) 252 { 253 struct perf_evsel *evsel = perf_evlist__first(&evlist->core); 254 255 return container_of(evsel, struct evsel, core); 256 } 257 258 static inline struct evsel *evlist__last(struct evlist *evlist) 259 { 260 struct perf_evsel *evsel = perf_evlist__last(&evlist->core); 261 262 return container_of(evsel, struct evsel, core); 263 } 264 265 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size); 266 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size); 267 268 bool perf_evlist__can_select_event(struct evlist *evlist, const char *str); 269 void perf_evlist__to_front(struct evlist *evlist, 270 struct evsel *move_evsel); 271 272 /** 273 * __evlist__for_each_entry - iterate thru all the evsels 274 * @list: list_head instance to iterate 275 * @evsel: struct evsel iterator 276 */ 277 #define __evlist__for_each_entry(list, evsel) \ 278 list_for_each_entry(evsel, list, core.node) 279 280 /** 281 * evlist__for_each_entry - iterate thru all the evsels 282 * @evlist: evlist instance to iterate 283 * @evsel: struct evsel iterator 284 */ 285 #define evlist__for_each_entry(evlist, evsel) \ 286 __evlist__for_each_entry(&(evlist)->core.entries, evsel) 287 288 /** 289 * __evlist__for_each_entry_continue - continue iteration thru all the evsels 290 * @list: list_head instance to iterate 291 * @evsel: struct evsel iterator 292 */ 293 #define __evlist__for_each_entry_continue(list, evsel) \ 294 list_for_each_entry_continue(evsel, list, core.node) 295 296 /** 297 * evlist__for_each_entry_continue - continue iteration thru all the evsels 298 * @evlist: evlist instance to iterate 299 * @evsel: struct evsel iterator 300 */ 301 #define evlist__for_each_entry_continue(evlist, evsel) \ 302 __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel) 303 304 /** 305 * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 306 * @list: list_head instance to iterate 307 * @evsel: struct evsel iterator 308 */ 309 #define __evlist__for_each_entry_reverse(list, evsel) \ 310 list_for_each_entry_reverse(evsel, list, core.node) 311 312 /** 313 * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 314 * @evlist: evlist instance to iterate 315 * @evsel: struct evsel iterator 316 */ 317 #define evlist__for_each_entry_reverse(evlist, evsel) \ 318 __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel) 319 320 /** 321 * __evlist__for_each_entry_safe - safely iterate thru all the evsels 322 * @list: list_head instance to iterate 323 * @tmp: struct evsel temp iterator 324 * @evsel: struct evsel iterator 325 */ 326 #define __evlist__for_each_entry_safe(list, tmp, evsel) \ 327 list_for_each_entry_safe(evsel, tmp, list, core.node) 328 329 /** 330 * evlist__for_each_entry_safe - safely iterate thru all the evsels 331 * @evlist: evlist instance to iterate 332 * @evsel: struct evsel iterator 333 * @tmp: struct evsel temp iterator 334 */ 335 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \ 336 __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel) 337 338 #define evlist__for_each_cpu(evlist, index, cpu) \ 339 evlist__cpu_iter_start(evlist); \ 340 perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus) 341 342 struct evsel *perf_evlist__get_tracking_event(struct evlist *evlist); 343 void perf_evlist__set_tracking_event(struct evlist *evlist, 344 struct evsel *tracking_evsel); 345 346 void evlist__cpu_iter_start(struct evlist *evlist); 347 bool evsel__cpu_iter_skip(struct evsel *ev, int cpu); 348 bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu); 349 350 struct evsel * 351 perf_evlist__find_evsel_by_str(struct evlist *evlist, const char *str); 352 353 struct evsel *perf_evlist__event2evsel(struct evlist *evlist, 354 union perf_event *event); 355 356 bool perf_evlist__exclude_kernel(struct evlist *evlist); 357 358 void perf_evlist__force_leader(struct evlist *evlist); 359 360 struct evsel *perf_evlist__reset_weak_group(struct evlist *evlist, 361 struct evsel *evsel, 362 bool close); 363 #define EVLIST_CTL_CMD_ENABLE_TAG "enable" 364 #define EVLIST_CTL_CMD_DISABLE_TAG "disable" 365 #define EVLIST_CTL_CMD_ACK_TAG "ack\n" 366 367 #define EVLIST_CTL_CMD_MAX_LEN 64 368 369 enum evlist_ctl_cmd { 370 EVLIST_CTL_CMD_UNSUPPORTED = 0, 371 EVLIST_CTL_CMD_ENABLE, 372 EVLIST_CTL_CMD_DISABLE, 373 EVLIST_CTL_CMD_ACK 374 }; 375 376 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); 377 int evlist__finalize_ctlfd(struct evlist *evlist); 378 bool evlist__ctlfd_initialized(struct evlist *evlist); 379 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); 380 381 #define EVLIST_ENABLED_MSG "Events enabled\n" 382 #define EVLIST_DISABLED_MSG "Events disabled\n" 383 384 #endif /* __PERF_EVLIST_H */ 385