tools/perf/util/evlist.h

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