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 "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 *evlist__new_default(void);
  91 struct evlist *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 evlist__add_sb_event(struct evlist *evlist, struct perf_event_attr *attr,
 116                          evsel__sb_cb_t cb, void *data);
 117 void evlist__set_cb(struct evlist *evlist, evsel__sb_cb_t cb, void *data);
 118 int evlist__start_sb_thread(struct evlist *evlist, struct target *target);
 119 void evlist__stop_sb_thread(struct evlist *evlist);
 120
 121 int evlist__add_newtp(struct evlist *evlist, const char *sys, const char *name, void *handler);
 122
 123 int __evlist__set_tracepoints_handlers(struct evlist *evlist,
 124                                        const struct evsel_str_handler *assocs,
 125                                        size_t nr_assocs);
 126
 127 #define evlist__set_tracepoints_handlers(evlist, array) \
 128         __evlist__set_tracepoints_handlers(evlist, array, ARRAY_SIZE(array))
 129
 130 int evlist__set_tp_filter(struct evlist *evlist, const char *filter);
 131 int evlist__set_tp_filter_pid(struct evlist *evlist, pid_t pid);
 132 int evlist__set_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids);
 133
 134 int evlist__append_tp_filter(struct evlist *evlist, const char *filter);
 135
 136 int evlist__append_tp_filter_pid(struct evlist *evlist, pid_t pid);
 137 int evlist__append_tp_filter_pids(struct evlist *evlist, size_t npids, pid_t *pids);
 138
 139 struct evsel *evlist__find_tracepoint_by_id(struct evlist *evlist, int id);
 140 struct evsel *evlist__find_tracepoint_by_name(struct evlist *evlist, const char *name);
 141
 142 int evlist__add_pollfd(struct evlist *evlist, int fd);
 143 int evlist__filter_pollfd(struct evlist *evlist, short revents_and_mask);
 144
 145 int evlist__poll(struct evlist *evlist, int timeout);
 146
 147 struct evsel *evlist__id2evsel(struct evlist *evlist, u64 id);
 148 struct evsel *evlist__id2evsel_strict(struct evlist *evlist, u64 id);
 149
 150 struct perf_sample_id *evlist__id2sid(struct evlist *evlist, u64 id);
 151
 152 void evlist__toggle_bkw_mmap(struct evlist *evlist, enum bkw_mmap_state state);
 153
 154 void evlist__mmap_consume(struct evlist *evlist, int idx);
 155
 156 int evlist__open(struct evlist *evlist);
 157 void evlist__close(struct evlist *evlist);
 158
 159 struct callchain_param;
 160
 161 void evlist__set_id_pos(struct evlist *evlist);
 162 void evlist__config(struct evlist *evlist, struct record_opts *opts, struct callchain_param *callchain);
 163 int record_opts__config(struct record_opts *opts);
 164
 165 int evlist__prepare_workload(struct evlist *evlist, struct target *target,
 166                              const char *argv[], bool pipe_output,
 167                              void (*exec_error)(int signo, siginfo_t *info, void *ucontext));
 168 int evlist__start_workload(struct evlist *evlist);
 169
 170 struct option;
 171
 172 int __evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str);
 173 int evlist__parse_mmap_pages(const struct option *opt, const char *str, int unset);
 174
 175 unsigned long perf_event_mlock_kb_in_pages(void);
 176
 177 int evlist__mmap_ex(struct evlist *evlist, unsigned int pages,
 178                          unsigned int auxtrace_pages,
 179                          bool auxtrace_overwrite, int nr_cblocks,
 180                          int affinity, int flush, int comp_level);
 181 int evlist__mmap(struct evlist *evlist, unsigned int pages);
 182 void evlist__munmap(struct evlist *evlist);
 183
 184 size_t evlist__mmap_size(unsigned long pages);
 185
 186 void evlist__disable(struct evlist *evlist);
 187 void evlist__enable(struct evlist *evlist);
 188 void evlist__toggle_enable(struct evlist *evlist);
 189 void evlist__disable_evsel(struct evlist *evlist, char *evsel_name);
 190 void evlist__enable_evsel(struct evlist *evlist, char *evsel_name);
 191
 192 int evlist__enable_event_idx(struct evlist *evlist, struct evsel *evsel, int idx);
 193
 194 void evlist__set_selected(struct evlist *evlist, struct evsel *evsel);
 195
 196 int evlist__create_maps(struct evlist *evlist, struct target *target);
 197 int evlist__apply_filters(struct evlist *evlist, struct evsel **err_evsel);
 198
 199 void __evlist__set_leader(struct list_head *list);
 200 void evlist__set_leader(struct evlist *evlist);
 201
 202 u64 __evlist__combined_sample_type(struct evlist *evlist);
 203 u64 evlist__combined_sample_type(struct evlist *evlist);
 204 u64 evlist__combined_branch_type(struct evlist *evlist);
 205 bool evlist__sample_id_all(struct evlist *evlist);
 206 u16 evlist__id_hdr_size(struct evlist *evlist);
 207
 208 int evlist__parse_sample(struct evlist *evlist, union perf_event *event, struct perf_sample *sample);
 209 int evlist__parse_sample_timestamp(struct evlist *evlist, union perf_event *event, u64 *timestamp);
 210
 211 bool evlist__valid_sample_type(struct evlist *evlist);
 212 bool evlist__valid_sample_id_all(struct evlist *evlist);
 213 bool evlist__valid_read_format(struct evlist *evlist);
 214
 215 void evlist__splice_list_tail(struct evlist *evlist, struct list_head *list);
 216
 217 static inline bool evlist__empty(struct evlist *evlist)
 218 {
 219         return list_empty(&evlist->core.entries);
 220 }
 221
 222 static inline struct evsel *evlist__first(struct evlist *evlist)
 223 {
 224         struct perf_evsel *evsel = perf_evlist__first(&evlist->core);
 225
 226         return container_of(evsel, struct evsel, core);
 227 }
 228
 229 static inline struct evsel *evlist__last(struct evlist *evlist)
 230 {
 231         struct perf_evsel *evsel = perf_evlist__last(&evlist->core);
 232
 233         return container_of(evsel, struct evsel, core);
 234 }
 235
 236 int evlist__strerror_open(struct evlist *evlist, int err, char *buf, size_t size);
 237 int evlist__strerror_mmap(struct evlist *evlist, int err, char *buf, size_t size);
 238
 239 bool evlist__can_select_event(struct evlist *evlist, const char *str);
 240 void evlist__to_front(struct evlist *evlist, struct evsel *move_evsel);
 241
 242 /**
 243  * __evlist__for_each_entry - iterate thru all the evsels
 244  * @list: list_head instance to iterate
 245  * @evsel: struct evsel iterator
 246  */
 247 #define __evlist__for_each_entry(list, evsel) \
 248         list_for_each_entry(evsel, list, core.node)
 249
 250 /**
 251  * evlist__for_each_entry - iterate thru all the evsels
 252  * @evlist: evlist instance to iterate
 253  * @evsel: struct evsel iterator
 254  */
 255 #define evlist__for_each_entry(evlist, evsel) \
 256         __evlist__for_each_entry(&(evlist)->core.entries, evsel)
 257
 258 /**
 259  * __evlist__for_each_entry_continue - continue iteration thru all the evsels
 260  * @list: list_head instance to iterate
 261  * @evsel: struct evsel iterator
 262  */
 263 #define __evlist__for_each_entry_continue(list, evsel) \
 264         list_for_each_entry_continue(evsel, list, core.node)
 265
 266 /**
 267  * evlist__for_each_entry_continue - continue iteration thru all the evsels
 268  * @evlist: evlist instance to iterate
 269  * @evsel: struct evsel iterator
 270  */
 271 #define evlist__for_each_entry_continue(evlist, evsel) \
 272         __evlist__for_each_entry_continue(&(evlist)->core.entries, evsel)
 273
 274 /**
 275  * __evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order
 276  * @list: list_head instance to iterate
 277  * @evsel: struct evsel iterator
 278  */
 279 #define __evlist__for_each_entry_reverse(list, evsel) \
 280         list_for_each_entry_reverse(evsel, list, core.node)
 281
 282 /**
 283  * evlist__for_each_entry_reverse - iterate thru all the evsels in reverse order
 284  * @evlist: evlist instance to iterate
 285  * @evsel: struct evsel iterator
 286  */
 287 #define evlist__for_each_entry_reverse(evlist, evsel) \
 288         __evlist__for_each_entry_reverse(&(evlist)->core.entries, evsel)
 289
 290 /**
 291  * __evlist__for_each_entry_safe - safely iterate thru all the evsels
 292  * @list: list_head instance to iterate
 293  * @tmp: struct evsel temp iterator
 294  * @evsel: struct evsel iterator
 295  */
 296 #define __evlist__for_each_entry_safe(list, tmp, evsel) \
 297         list_for_each_entry_safe(evsel, tmp, list, core.node)
 298
 299 /**
 300  * evlist__for_each_entry_safe - safely iterate thru all the evsels
 301  * @evlist: evlist instance to iterate
 302  * @evsel: struct evsel iterator
 303  * @tmp: struct evsel temp iterator
 304  */
 305 #define evlist__for_each_entry_safe(evlist, tmp, evsel) \
 306         __evlist__for_each_entry_safe(&(evlist)->core.entries, tmp, evsel)
 307
 308 #define evlist__for_each_cpu(evlist, index, cpu)        \
 309         evlist__cpu_iter_start(evlist);                 \
 310         perf_cpu_map__for_each_cpu (cpu, index, (evlist)->core.all_cpus)
 311
 312 struct evsel *evlist__get_tracking_event(struct evlist *evlist);
 313 void evlist__set_tracking_event(struct evlist *evlist, struct evsel *tracking_evsel);
 314
 315 void evlist__cpu_iter_start(struct evlist *evlist);
 316 bool evsel__cpu_iter_skip(struct evsel *ev, int cpu);
 317 bool evsel__cpu_iter_skip_no_inc(struct evsel *ev, int cpu);
 318
 319 struct evsel *evlist__find_evsel_by_str(struct evlist *evlist, const char *str);
 320
 321 struct evsel *evlist__event2evsel(struct evlist *evlist, union perf_event *event);
 322
 323 bool evlist__exclude_kernel(struct evlist *evlist);
 324
 325 void evlist__force_leader(struct evlist *evlist);
 326
 327 struct evsel *evlist__reset_weak_group(struct evlist *evlist, struct evsel *evsel, bool close);
 328
 329 #define EVLIST_CTL_CMD_ENABLE_TAG  "enable"
 330 #define EVLIST_CTL_CMD_DISABLE_TAG "disable"
 331 #define EVLIST_CTL_CMD_ACK_TAG     "ack\n"
 332 #define EVLIST_CTL_CMD_SNAPSHOT_TAG "snapshot"
 333
 334 #define EVLIST_CTL_CMD_MAX_LEN 64
 335
 336 enum evlist_ctl_cmd {
 337         EVLIST_CTL_CMD_UNSUPPORTED = 0,
 338         EVLIST_CTL_CMD_ENABLE,
 339         EVLIST_CTL_CMD_DISABLE,
 340         EVLIST_CTL_CMD_ACK,
 341         EVLIST_CTL_CMD_SNAPSHOT,
 342 };
 343
 344 int evlist__parse_control(const char *str, int *ctl_fd, int *ctl_fd_ack, bool *ctl_fd_close);
 345 void evlist__close_control(int ctl_fd, int ctl_fd_ack, bool *ctl_fd_close);
 346 int evlist__initialize_ctlfd(struct evlist *evlist, int ctl_fd, int ctl_fd_ack);
 347 int evlist__finalize_ctlfd(struct evlist *evlist);
 348 bool evlist__ctlfd_initialized(struct evlist *evlist);
 349 int evlist__ctlfd_process(struct evlist *evlist, enum evlist_ctl_cmd *cmd);
 350 int evlist__ctlfd_ack(struct evlist *evlist);
 351
 352 #define EVLIST_ENABLED_MSG "Events enabled\n"
 353 #define EVLIST_DISABLED_MSG "Events disabled\n"
 354
 355 struct evsel *evlist__find_evsel(struct evlist *evlist, int idx);
 356 #endif /* __PERF_EVLIST_H */