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 bool enabled; 54 int id_pos; 55 int is_pos; 56 u64 combined_sample_type; 57 enum bkw_mmap_state bkw_mmap_state; 58 struct { 59 int cork_fd; 60 pid_t pid; 61 } workload; 62 struct mmap *mmap; 63 struct mmap *overwrite_mmap; 64 struct evsel *selected; 65 struct events_stats stats; 66 struct perf_env *env; 67 void (*trace_event_sample_raw)(struct evlist *evlist, 68 union perf_event *event, 69 struct perf_sample *sample); 70 u64 first_sample_time; 71 u64 last_sample_time; 72 struct { 73 pthread_t th; 74 volatile int done; 75 } thread; 76 struct { 77 int fd; /* control file descriptor */ 78 int ack; /* ack file descriptor for control commands */ 79 int pos; /* index at evlist core object to check signals */ 80 } ctl_fd; 81 }; 82 83 struct evsel_str_handler { 84 const char *name; 85 void *handler; 86 }; 87 88 struct evlist *evlist__new(void); 89 struct evlist *evlist__new_default(void); 90 struct evlist *evlist__new_dummy(void); 91 void evlist__init(struct evlist *evlist, struct perf_cpu_map *cpus, 92 struct perf_thread_map *threads); 93 void evlist__exit(struct evlist *evlist); 94 void evlist__delete(struct evlist *evlist); 95 96 void evlist__add(struct evlist *evlist, struct evsel *entry); 97 void evlist__remove(struct evlist *evlist, struct evsel *evsel); 98 99 int __evlist__add_default(struct evlist *evlist, bool precise); 100 101 static inline int evlist__add_default(struct evlist *evlist) 102 { 103 return __evlist__add_default(evlist, true); 104 } 105 106 int __evlist__add_default_attrs(struct evlist *evlist, 107 struct perf_event_attr *attrs, size_t nr_attrs); 108 109 #define evlist__add_default_attrs(evlist, array) \ 110 __evlist__add_default_attrs(evlist, array, ARRAY_SIZE(array)) 111 112 int arch_evlist__add_default_attrs(struct evlist *evlist); 113 114 int evlist__add_dummy(struct evlist *evlist); 115 116 int evlist__add_sb_event(struct evlist *evlist, struct perf_event_attr *attr, 117 evsel__sb_cb_t cb, void *data); 118 void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data); 119 int evlist__start_sb_thread(struct evlist *evlist, struct target *target); 120 void evlist__stop_sb_thread(struct evlist *evlist); 121 122 int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler); 123 124 int __evlist__set_tracepoints_handlers(struct evlist *evlist, 125 const struct evsel_str_handler *assocs, 126 size_t nr_assocs); 127 128 #define evlist__set_tracepoints_handlers(evlist, array) \ 129 __evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array)) 130 131 int evlist__set_tp_filter(struct evlist *evlist, const char *filter); 132 int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid); 133 int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 134 135 int evlist__append_tp_filter(struct evlist *evlist, const char *filter); 136 137 int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid); 138 int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids); 139 140 struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id); 141 struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name); 142 143 int evlist__add_pollfd(struct evlist *evlist, int fd); 144 int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask); 145 146 #ifdef HAVE_EVENTFD_SUPPORT 147 int evlist__add_wakeup_eventfd(struct evlist *evlist, int fd); 148 #endif 149 150 int evlist__poll(struct evlist *evlist, int timeout); 151 152 struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id); 153 struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id); 154 155 struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id); 156 157 void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state); 158 159 void evlist__mmap_consume(struct evlist *evlist, int idx); 160 161 int evlist__open(struct evlist *evlist); 162 void evlist__close(struct evlist *evlist); 163 164 struct callchain_param; 165 166 void evlist__set_id_pos(struct evlist *evlist); 167 void evlist__config(struct evlist *evlist, struct record_opts *opts, struct callchain_param *callchain); 168 int record_opts__config(struct record_opts *opts); 169 170 int evlist__prepare_workload(struct evlist *evlist, struct target *target, 171 const char *argv[], bool pipe_output, 172 void (*exec_error)(int signo, siginfo_t *info, void *ucontext)); 173 int evlist__start_workload(struct evlist *evlist); 174 175 struct option; 176 177 int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str); 178 int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset); 179 180 unsigned long perf_event_mlock_kb_in_pages(void); 181 182 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages, 183 unsigned int auxtrace_pages, 184 bool auxtrace_overwrite, int nr_cblocks, 185 int affinity, int flush, int comp_level); 186 int evlist__mmap(struct evlist *evlist, unsigned int pages); 187 void evlist__munmap(struct evlist *evlist); 188 189 size_t evlist__mmap_size(unsigned long pages); 190 191 void evlist__disable(struct evlist *evlist); 192 void evlist__enable(struct evlist *evlist); 193 void evlist__toggle_enable(struct evlist *evlist); 194 void evlist__disable_evsel(struct evlist *evlist, char *evsel_name); 195 void evlist__enable_evsel(struct evlist *evlist, char *evsel_name); 196 197 int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel, int idx); 198 199 void evlist__set_selected(struct evlist *evlist, struct evsel *evsel); 200 201 int evlist__create_maps(struct evlist *evlist, struct target *target); 202 int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel); 203 204 void evlist__set_leader(struct evlist *evlist); 205 206 u64 __evlist__combined_sample_type(struct evlist *evlist); 207 u64 evlist__combined_sample_type(struct evlist *evlist); 208 u64 evlist__combined_branch_type(struct evlist *evlist); 209 bool evlist__sample_id_all(struct evlist *evlist); 210 u16 evlist__id_hdr_size(struct evlist *evlist); 211 212 int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample); 213 int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp); 214 215 bool evlist__valid_sample_type(struct evlist *evlist); 216 bool evlist__valid_sample_id_all(struct evlist *evlist); 217 bool evlist__valid_read_format(struct evlist *evlist); 218 219 void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list); 220 221 static inline bool evlist__empty(struct evlist *evlist) 222 { 223 return list_empty(&evlist->core.entries); 224 } 225 226 static inline struct evsel *evlist__first(struct evlist *evlist) 227 { 228 struct perf_evsel *evsel = perf_evlist__first(&evlist->core); 229 230 return container_of(evsel, struct evsel, core); 231 } 232 233 static inline struct evsel *evlist__last(struct evlist *evlist) 234 { 235 struct perf_evsel *evsel = perf_evlist__last(&evlist->core); 236 237 return container_of(evsel, struct evsel, core); 238 } 239 240 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size); 241 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size); 242 243 bool evlist__can_select_event(struct evlist *evlist, const char *str); 244 void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel); 245 246 /** 247 * __evlist__for_each_entry - iterate thru all the evsels 248 * @list: list_head instance to iterate 249 * @evsel: struct evsel iterator 250 */ 251 #define __evlist__for_each_entry(list, evsel) \ 252 list_for_each_entry(evsel, list, core.node) 253 254 /** 255 * evlist__for_each_entry - iterate thru all the evsels 256 * @evlist: evlist instance to iterate 257 * @evsel: struct evsel iterator 258 */ 259 #define evlist__for_each_entry(evlist, evsel) \ 260 __evlist__for_each_entry(&(evlist)->core.entries, evsel) 261 262 /** 263 * __evlist__for_each_entry_continue - continue iteration thru all the evsels 264 * @list: list_head instance to iterate 265 * @evsel: struct evsel iterator 266 */ 267 #define __evlist__for_each_entry_continue(list, evsel) \ 268 list_for_each_entry_continue(evsel, list, core.node) 269 270 /** 271 * evlist__for_each_entry_continue - continue iteration thru all the evsels 272 * @evlist: evlist instance to iterate 273 * @evsel: struct evsel iterator 274 */ 275 #define evlist__for_each_entry_continue(evlist, evsel) \ 276 __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel) 277 278 /** 279 * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 280 * @list: list_head instance to iterate 281 * @evsel: struct evsel iterator 282 */ 283 #define __evlist__for_each_entry_reverse(list, evsel) \ 284 list_for_each_entry_reverse(evsel, list, core.node) 285 286 /** 287 * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order 288 * @evlist: evlist instance to iterate 289 * @evsel: struct evsel iterator 290 */ 291 #define evlist__for_each_entry_reverse(evlist, evsel) \ 292 __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel) 293 294 /** 295 * __evlist__for_each_entry_safe - safely iterate thru all the evsels 296 * @list: list_head instance to iterate 297 * @tmp: struct evsel temp iterator 298 * @evsel: struct evsel iterator 299 */ 300 #define __evlist__for_each_entry_safe(list, tmp, evsel) \ 301 list_for_each_entry_safe(evsel, tmp, list, core.node) 302 303 /** 304 * evlist__for_each_entry_safe - safely iterate thru all the evsels 305 * @evlist: evlist instance to iterate 306 * @evsel: struct evsel iterator 307 * @tmp: struct evsel temp iterator 308 */ 309 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \ 310 __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel) 311 312 #define evlist__for_each_cpu(evlist, index, cpu) \ 313 evlist__cpu_iter_start(evlist); \ 314 perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus) 315 316 struct evsel *evlist__get_tracking_event(struct evlist *evlist); 317 void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel); 318 319 void evlist__cpu_iter_start(struct evlist *evlist); 320 bool evsel__cpu_iter_skip(struct evsel *ev, int cpu); 321 bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu); 322 323 struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str); 324 325 struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event); 326 327 bool evlist__exclude_kernel(struct evlist *evlist); 328 329 void evlist__force_leader(struct evlist *evlist); 330 331 struct evsel *evlist__reset_weak_group(struct evlist *evlist, struct evsel *evsel, bool close); 332 333 #define EVLIST_CTL_CMD_ENABLE_TAG "enable" 334 #define EVLIST_CTL_CMD_DISABLE_TAG "disable" 335 #define EVLIST_CTL_CMD_ACK_TAG "ack\n" 336 #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot" 337 #define EVLIST_CTL_CMD_EVLIST_TAG "evlist" 338 #define EVLIST_CTL_CMD_STOP_TAG "stop" 339 #define EVLIST_CTL_CMD_PING_TAG "ping" 340 341 #define EVLIST_CTL_CMD_MAX_LEN 64 342 343 enum evlist_ctl_cmd { 344 EVLIST_CTL_CMD_UNSUPPORTED = 0, 345 EVLIST_CTL_CMD_ENABLE, 346 EVLIST_CTL_CMD_DISABLE, 347 EVLIST_CTL_CMD_ACK, 348 EVLIST_CTL_CMD_SNAPSHOT, 349 EVLIST_CTL_CMD_EVLIST, 350 EVLIST_CTL_CMD_STOP, 351 EVLIST_CTL_CMD_PING, 352 }; 353 354 int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close); 355 void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close); 356 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack); 357 int evlist__finalize_ctlfd(struct evlist *evlist); 358 bool evlist__ctlfd_initialized(struct evlist *evlist); 359 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd); 360 int evlist__ctlfd_ack(struct evlist *evlist); 361 362 #define EVLIST_ENABLED_MSG "Events enabled\n" 363 #define EVLIST_DISABLED_MSG "Events disabled\n" 364 365 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx); 366 367 int evlist__scnprintf_evsels(struct evlist *evlist, size_t size, char *bf); 368 void evlist__check_mem_load_aux(struct evlist *evlist); 369 #endif /* __PERF_EVLIST_H */ 370