tools/perf/util/hist.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef __PERF_HIST_H
   3 #define __PERF_HIST_H
   4
   5 #include <linux/rbtree.h>
   6 #include <linux/types.h>
   7 #include <pthread.h>
   8 #include "evsel.h"
   9 #include "color.h"
  10 #include "events_stats.h"
  11
  12 struct hist_entry;
  13 struct hist_entry_ops;
  14 struct addr_location;
  15 struct map_symbol;
  16 struct mem_info;
  17 struct branch_info;
  18 struct branch_stack;
  19 struct block_info;
  20 struct symbol;
  21 struct ui_progress;
  22
  23 enum hist_filter {
  24         HIST_FILTER__DSO,
  25         HIST_FILTER__THREAD,
  26         HIST_FILTER__PARENT,
  27         HIST_FILTER__SYMBOL,
  28         HIST_FILTER__GUEST,
  29         HIST_FILTER__HOST,
  30         HIST_FILTER__SOCKET,
  31         HIST_FILTER__C2C,
  32 };
  33
  34 enum hist_column {
  35         HISTC_SYMBOL,
  36         HISTC_TIME,
  37         HISTC_DSO,
  38         HISTC_THREAD,
  39         HISTC_COMM,
  40         HISTC_CGROUP_ID,
  41         HISTC_CGROUP,
  42         HISTC_PARENT,
  43         HISTC_CPU,
  44         HISTC_SOCKET,
  45         HISTC_SRCLINE,
  46         HISTC_SRCFILE,
  47         HISTC_MISPREDICT,
  48         HISTC_IN_TX,
  49         HISTC_ABORT,
  50         HISTC_SYMBOL_FROM,
  51         HISTC_SYMBOL_TO,
  52         HISTC_DSO_FROM,
  53         HISTC_DSO_TO,
  54         HISTC_LOCAL_WEIGHT,
  55         HISTC_GLOBAL_WEIGHT,
  56         HISTC_CODE_PAGE_SIZE,
  57         HISTC_MEM_DADDR_SYMBOL,
  58         HISTC_MEM_DADDR_DSO,
  59         HISTC_MEM_PHYS_DADDR,
  60         HISTC_MEM_DATA_PAGE_SIZE,
  61         HISTC_MEM_LOCKED,
  62         HISTC_MEM_TLB,
  63         HISTC_MEM_LVL,
  64         HISTC_MEM_SNOOP,
  65         HISTC_MEM_DCACHELINE,
  66         HISTC_MEM_IADDR_SYMBOL,
  67         HISTC_TRANSACTION,
  68         HISTC_CYCLES,
  69         HISTC_SRCLINE_FROM,
  70         HISTC_SRCLINE_TO,
  71         HISTC_TRACE,
  72         HISTC_SYM_SIZE,
  73         HISTC_DSO_SIZE,
  74         HISTC_SYMBOL_IPC,
  75         HISTC_MEM_BLOCKED,
  76         HISTC_LOCAL_INS_LAT,
  77         HISTC_GLOBAL_INS_LAT,
  78         HISTC_P_STAGE_CYC,
  79         HISTC_NR_COLS, /* Last entry */
  80 };
  81
  82 struct thread;
  83 struct dso;
  84
  85 struct hists {
  86         struct rb_root_cached   entries_in_array[2];
  87         struct rb_root_cached   *entries_in;
  88         struct rb_root_cached   entries;
  89         struct rb_root_cached   entries_collapsed;
  90         u64                     nr_entries;
  91         u64                     nr_non_filtered_entries;
  92         u64                     callchain_period;
  93         u64                     callchain_non_filtered_period;
  94         struct thread           *thread_filter;
  95         const struct dso        *dso_filter;
  96         const char              *uid_filter_str;
  97         const char              *symbol_filter_str;
  98         pthread_mutex_t         lock;
  99         struct hists_stats      stats;
 100         u64                     event_stream;
 101         u16                     col_len[HISTC_NR_COLS];
 102         bool                    has_callchains;
 103         int                     socket_filter;
 104         struct perf_hpp_list    *hpp_list;
 105         struct list_head        hpp_formats;
 106         int                     nr_hpp_node;
 107 };
 108
 109 #define hists__has(__h, __f) (__h)->hpp_list->__f
 110
 111 struct hist_entry_iter;
 112
 113 struct hist_iter_ops {
 114         int (*prepare_entry)(struct hist_entry_iter *, struct addr_location *);
 115         int (*add_single_entry)(struct hist_entry_iter *, struct addr_location *);
 116         int (*next_entry)(struct hist_entry_iter *, struct addr_location *);
 117         int (*add_next_entry)(struct hist_entry_iter *, struct addr_location *);
 118         int (*finish_entry)(struct hist_entry_iter *, struct addr_location *);
 119 };
 120
 121 struct hist_entry_iter {
 122         int total;
 123         int curr;
 124
 125         bool hide_unresolved;
 126
 127         struct evsel *evsel;
 128         struct perf_sample *sample;
 129         struct hist_entry *he;
 130         struct symbol *parent;
 131         void *priv;
 132
 133         const struct hist_iter_ops *ops;
 134         /* user-defined callback function (optional) */
 135         int (*add_entry_cb)(struct hist_entry_iter *iter,
 136                             struct addr_location *al, bool single, void *arg);
 137 };
 138
 139 extern const struct hist_iter_ops hist_iter_normal;
 140 extern const struct hist_iter_ops hist_iter_branch;
 141 extern const struct hist_iter_ops hist_iter_mem;
 142 extern const struct hist_iter_ops hist_iter_cumulative;
 143
 144 struct hist_entry *hists__add_entry(struct hists *hists,
 145                                     struct addr_location *al,
 146                                     struct symbol *parent,
 147                                     struct branch_info *bi,
 148                                     struct mem_info *mi,
 149                                     struct perf_sample *sample,
 150                                     bool sample_self);
 151
 152 struct hist_entry *hists__add_entry_ops(struct hists *hists,
 153                                         struct hist_entry_ops *ops,
 154                                         struct addr_location *al,
 155                                         struct symbol *sym_parent,
 156                                         struct branch_info *bi,
 157                                         struct mem_info *mi,
 158                                         struct perf_sample *sample,
 159                                         bool sample_self);
 160
 161 struct hist_entry *hists__add_entry_block(struct hists *hists,
 162                                           struct addr_location *al,
 163                                           struct block_info *bi);
 164
 165 int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
 166                          int max_stack_depth, void *arg);
 167
 168 struct perf_hpp;
 169 struct perf_hpp_fmt;
 170
 171 int64_t hist_entry__cmp(struct hist_entry *left, struct hist_entry *right);
 172 int64_t hist_entry__collapse(struct hist_entry *left, struct hist_entry *right);
 173 int hist_entry__transaction_len(void);
 174 int hist_entry__sort_snprintf(struct hist_entry *he, char *bf, size_t size,
 175                               struct hists *hists);
 176 int hist_entry__snprintf_alignment(struct hist_entry *he, struct perf_hpp *hpp,
 177                                    struct perf_hpp_fmt *fmt, int printed);
 178 void hist_entry__delete(struct hist_entry *he);
 179
 180 typedef int (*hists__resort_cb_t)(struct hist_entry *he, void *arg);
 181
 182 void evsel__output_resort_cb(struct evsel *evsel, struct ui_progress *prog,
 183                              hists__resort_cb_t cb, void *cb_arg);
 184 void evsel__output_resort(struct evsel *evsel, struct ui_progress *prog);
 185 void hists__output_resort(struct hists *hists, struct ui_progress *prog);
 186 void hists__output_resort_cb(struct hists *hists, struct ui_progress *prog,
 187                              hists__resort_cb_t cb);
 188 int hists__collapse_resort(struct hists *hists, struct ui_progress *prog);
 189
 190 void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel);
 191 void hists__delete_entries(struct hists *hists);
 192 void hists__output_recalc_col_len(struct hists *hists, int max_rows);
 193
 194 struct hist_entry *hists__get_entry(struct hists *hists, int idx);
 195
 196 u64 hists__total_period(struct hists *hists);
 197 void hists__reset_stats(struct hists *hists);
 198 void hists__inc_stats(struct hists *hists, struct hist_entry *h);
 199 void hists__inc_nr_events(struct hists *hists);
 200 void hists__inc_nr_samples(struct hists *hists, bool filtered);
 201
 202 size_t hists__fprintf(struct hists *hists, bool show_header, int max_rows,
 203                       int max_cols, float min_pcnt, FILE *fp,
 204                       bool ignore_callchains);
 205 size_t evlist__fprintf_nr_events(struct evlist *evlist, FILE *fp,
 206                                  bool skip_empty);
 207
 208 void hists__filter_by_dso(struct hists *hists);
 209 void hists__filter_by_thread(struct hists *hists);
 210 void hists__filter_by_symbol(struct hists *hists);
 211 void hists__filter_by_socket(struct hists *hists);
 212
 213 static inline bool hists__has_filter(struct hists *hists)
 214 {
 215         return hists->thread_filter || hists->dso_filter ||
 216                 hists->symbol_filter_str || (hists->socket_filter > -1);
 217 }
 218
 219 u16 hists__col_len(struct hists *hists, enum hist_column col);
 220 void hists__set_col_len(struct hists *hists, enum hist_column col, u16 len);
 221 bool hists__new_col_len(struct hists *hists, enum hist_column col, u16 len);
 222 void hists__reset_col_len(struct hists *hists);
 223 void hists__calc_col_len(struct hists *hists, struct hist_entry *he);
 224
 225 void hists__match(struct hists *leader, struct hists *other);
 226 int hists__link(struct hists *leader, struct hists *other);
 227 int hists__unlink(struct hists *hists);
 228
 229 struct hists_evsel {
 230         struct evsel evsel;
 231         struct hists      hists;
 232 };
 233
 234 static inline struct evsel *hists_to_evsel(struct hists *hists)
 235 {
 236         struct hists_evsel *hevsel = container_of(hists, struct hists_evsel, hists);
 237         return &hevsel->evsel;
 238 }
 239
 240 static inline struct hists *evsel__hists(struct evsel *evsel)
 241 {
 242         struct hists_evsel *hevsel = (struct hists_evsel *)evsel;
 243         return &hevsel->hists;
 244 }
 245
 246 static __pure inline bool hists__has_callchains(struct hists *hists)
 247 {
 248         return hists->has_callchains;
 249 }
 250
 251 int hists__init(void);
 252 int __hists__init(struct hists *hists, struct perf_hpp_list *hpp_list);
 253
 254 struct rb_root_cached *hists__get_rotate_entries_in(struct hists *hists);
 255
 256 struct perf_hpp {
 257         char *buf;
 258         size_t size;
 259         const char *sep;
 260         void *ptr;
 261         bool skip;
 262 };
 263
 264 struct perf_hpp_fmt {
 265         const char *name;
 266         int (*header)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 267                       struct hists *hists, int line, int *span);
 268         int (*width)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 269                      struct hists *hists);
 270         int (*color)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 271                      struct hist_entry *he);
 272         int (*entry)(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 273                      struct hist_entry *he);
 274         int64_t (*cmp)(struct perf_hpp_fmt *fmt,
 275                        struct hist_entry *a, struct hist_entry *b);
 276         int64_t (*collapse)(struct perf_hpp_fmt *fmt,
 277                             struct hist_entry *a, struct hist_entry *b);
 278         int64_t (*sort)(struct perf_hpp_fmt *fmt,
 279                         struct hist_entry *a, struct hist_entry *b);
 280         bool (*equal)(struct perf_hpp_fmt *a, struct perf_hpp_fmt *b);
 281         void (*free)(struct perf_hpp_fmt *fmt);
 282
 283         struct list_head list;
 284         struct list_head sort_list;
 285         bool elide;
 286         int len;
 287         int user_len;
 288         int idx;
 289         int level;
 290 };
 291
 292 struct perf_hpp_list {
 293         struct list_head fields;
 294         struct list_head sorts;
 295
 296         int nr_header_lines;
 297         int need_collapse;
 298         int parent;
 299         int sym;
 300         int dso;
 301         int socket;
 302         int thread;
 303         int comm;
 304 };
 305
 306 extern struct perf_hpp_list perf_hpp_list;
 307
 308 struct perf_hpp_list_node {
 309         struct list_head        list;
 310         struct perf_hpp_list    hpp;
 311         int                     level;
 312         bool                    skip;
 313 };
 314
 315 void perf_hpp_list__column_register(struct perf_hpp_list *list,
 316                                     struct perf_hpp_fmt *format);
 317 void perf_hpp_list__register_sort_field(struct perf_hpp_list *list,
 318                                         struct perf_hpp_fmt *format);
 319 void perf_hpp_list__prepend_sort_field(struct perf_hpp_list *list,
 320                                        struct perf_hpp_fmt *format);
 321
 322 static inline void perf_hpp__column_register(struct perf_hpp_fmt *format)
 323 {
 324         perf_hpp_list__column_register(&perf_hpp_list, format);
 325 }
 326
 327 static inline void perf_hpp__register_sort_field(struct perf_hpp_fmt *format)
 328 {
 329         perf_hpp_list__register_sort_field(&perf_hpp_list, format);
 330 }
 331
 332 static inline void perf_hpp__prepend_sort_field(struct perf_hpp_fmt *format)
 333 {
 334         perf_hpp_list__prepend_sort_field(&perf_hpp_list, format);
 335 }
 336
 337 #define perf_hpp_list__for_each_format(_list, format) \
 338         list_for_each_entry(format, &(_list)->fields, list)
 339
 340 #define perf_hpp_list__for_each_format_safe(_list, format, tmp) \
 341         list_for_each_entry_safe(format, tmp, &(_list)->fields, list)
 342
 343 #define perf_hpp_list__for_each_sort_list(_list, format) \
 344         list_for_each_entry(format, &(_list)->sorts, sort_list)
 345
 346 #define perf_hpp_list__for_each_sort_list_safe(_list, format, tmp)      \
 347         list_for_each_entry_safe(format, tmp, &(_list)->sorts, sort_list)
 348
 349 #define hists__for_each_format(hists, format) \
 350         perf_hpp_list__for_each_format((hists)->hpp_list, format)
 351
 352 #define hists__for_each_sort_list(hists, format) \
 353         perf_hpp_list__for_each_sort_list((hists)->hpp_list, format)
 354
 355 extern struct perf_hpp_fmt perf_hpp__format[];
 356
 357 enum {
 358         /* Matches perf_hpp__format array. */
 359         PERF_HPP__OVERHEAD,
 360         PERF_HPP__OVERHEAD_SYS,
 361         PERF_HPP__OVERHEAD_US,
 362         PERF_HPP__OVERHEAD_GUEST_SYS,
 363         PERF_HPP__OVERHEAD_GUEST_US,
 364         PERF_HPP__OVERHEAD_ACC,
 365         PERF_HPP__SAMPLES,
 366         PERF_HPP__PERIOD,
 367
 368         PERF_HPP__MAX_INDEX
 369 };
 370
 371 void perf_hpp__init(void);
 372 void perf_hpp__column_unregister(struct perf_hpp_fmt *format);
 373 void perf_hpp__cancel_cumulate(void);
 374 void perf_hpp__setup_output_field(struct perf_hpp_list *list);
 375 void perf_hpp__reset_output_field(struct perf_hpp_list *list);
 376 void perf_hpp__append_sort_keys(struct perf_hpp_list *list);
 377 int perf_hpp__setup_hists_formats(struct perf_hpp_list *list,
 378                                   struct evlist *evlist);
 379
 380
 381 bool perf_hpp__is_sort_entry(struct perf_hpp_fmt *format);
 382 bool perf_hpp__is_dynamic_entry(struct perf_hpp_fmt *format);
 383 bool perf_hpp__defined_dynamic_entry(struct perf_hpp_fmt *fmt, struct hists *hists);
 384 bool perf_hpp__is_trace_entry(struct perf_hpp_fmt *fmt);
 385 bool perf_hpp__is_srcline_entry(struct perf_hpp_fmt *fmt);
 386 bool perf_hpp__is_srcfile_entry(struct perf_hpp_fmt *fmt);
 387 bool perf_hpp__is_thread_entry(struct perf_hpp_fmt *fmt);
 388 bool perf_hpp__is_comm_entry(struct perf_hpp_fmt *fmt);
 389 bool perf_hpp__is_dso_entry(struct perf_hpp_fmt *fmt);
 390 bool perf_hpp__is_sym_entry(struct perf_hpp_fmt *fmt);
 391
 392 struct perf_hpp_fmt *perf_hpp_fmt__dup(struct perf_hpp_fmt *fmt);
 393
 394 int hist_entry__filter(struct hist_entry *he, int type, const void *arg);
 395
 396 static inline bool perf_hpp__should_skip(struct perf_hpp_fmt *format,
 397                                          struct hists *hists)
 398 {
 399         if (format->elide)
 400                 return true;
 401
 402         if (perf_hpp__is_dynamic_entry(format) &&
 403             !perf_hpp__defined_dynamic_entry(format, hists))
 404                 return true;
 405
 406         return false;
 407 }
 408
 409 void perf_hpp__reset_width(struct perf_hpp_fmt *fmt, struct hists *hists);
 410 void perf_hpp__reset_sort_width(struct perf_hpp_fmt *fmt, struct hists *hists);
 411 void perf_hpp__set_user_width(const char *width_list_str);
 412 void hists__reset_column_width(struct hists *hists);
 413
 414 typedef u64 (*hpp_field_fn)(struct hist_entry *he);
 415 typedef int (*hpp_callback_fn)(struct perf_hpp *hpp, bool front);
 416 typedef int (*hpp_snprint_fn)(struct perf_hpp *hpp, const char *fmt, ...);
 417
 418 int hpp__fmt(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 419              struct hist_entry *he, hpp_field_fn get_field,
 420              const char *fmtstr, hpp_snprint_fn print_fn, bool fmt_percent);
 421 int hpp__fmt_acc(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
 422                  struct hist_entry *he, hpp_field_fn get_field,
 423                  const char *fmtstr, hpp_snprint_fn print_fn, bool fmt_percent);
 424
 425 static inline void advance_hpp(struct perf_hpp *hpp, int inc)
 426 {
 427         hpp->buf  += inc;
 428         hpp->size -= inc;
 429 }
 430
 431 static inline size_t perf_hpp__use_color(void)
 432 {
 433         return !symbol_conf.field_sep;
 434 }
 435
 436 static inline size_t perf_hpp__color_overhead(void)
 437 {
 438         return perf_hpp__use_color() ?
 439                (COLOR_MAXLEN + sizeof(PERF_COLOR_RESET)) * PERF_HPP__MAX_INDEX
 440                : 0;
 441 }
 442
 443 struct evlist;
 444
 445 struct hist_browser_timer {
 446         void (*timer)(void *arg);
 447         void *arg;
 448         int refresh;
 449 };
 450
 451 struct annotation_options;
 452 struct res_sample;
 453
 454 enum rstype {
 455         A_NORMAL,
 456         A_ASM,
 457         A_SOURCE
 458 };
 459
 460 struct block_hist;
 461
 462 #ifdef HAVE_SLANG_SUPPORT
 463 #include "../ui/keysyms.h"
 464 void attr_to_script(char *buf, struct perf_event_attr *attr);
 465
 466 int map_symbol__tui_annotate(struct map_symbol *ms, struct evsel *evsel,
 467                              struct hist_browser_timer *hbt,
 468                              struct annotation_options *annotation_opts);
 469
 470 int hist_entry__tui_annotate(struct hist_entry *he, struct evsel *evsel,
 471                              struct hist_browser_timer *hbt,
 472                              struct annotation_options *annotation_opts);
 473
 474 int evlist__tui_browse_hists(struct evlist *evlist, const char *help, struct hist_browser_timer *hbt,
 475                              float min_pcnt, struct perf_env *env, bool warn_lost_event,
 476                              struct annotation_options *annotation_options);
 477
 478 int script_browse(const char *script_opt, struct evsel *evsel);
 479
 480 void run_script(char *cmd);
 481 int res_sample_browse(struct res_sample *res_samples, int num_res,
 482                       struct evsel *evsel, enum rstype rstype);
 483 void res_sample_init(void);
 484
 485 int block_hists_tui_browse(struct block_hist *bh, struct evsel *evsel,
 486                            float min_percent, struct perf_env *env,
 487                            struct annotation_options *annotation_opts);
 488 #else
 489 static inline
 490 int evlist__tui_browse_hists(struct evlist *evlist __maybe_unused,
 491                              const char *help __maybe_unused,
 492                              struct hist_browser_timer *hbt __maybe_unused,
 493                              float min_pcnt __maybe_unused,
 494                              struct perf_env *env __maybe_unused,
 495                              bool warn_lost_event __maybe_unused,
 496                              struct annotation_options *annotation_options __maybe_unused)
 497 {
 498         return 0;
 499 }
 500 static inline int map_symbol__tui_annotate(struct map_symbol *ms __maybe_unused,
 501                                            struct evsel *evsel __maybe_unused,
 502                                            struct hist_browser_timer *hbt __maybe_unused,
 503                                            struct annotation_options *annotation_options __maybe_unused)
 504 {
 505         return 0;
 506 }
 507
 508 static inline int hist_entry__tui_annotate(struct hist_entry *he __maybe_unused,
 509                                            struct evsel *evsel __maybe_unused,
 510                                            struct hist_browser_timer *hbt __maybe_unused,
 511                                            struct annotation_options *annotation_opts __maybe_unused)
 512 {
 513         return 0;
 514 }
 515
 516 static inline int script_browse(const char *script_opt __maybe_unused,
 517                                 struct evsel *evsel __maybe_unused)
 518 {
 519         return 0;
 520 }
 521
 522 static inline int res_sample_browse(struct res_sample *res_samples __maybe_unused,
 523                                     int num_res __maybe_unused,
 524                                     struct evsel *evsel __maybe_unused,
 525                                     enum rstype rstype __maybe_unused)
 526 {
 527         return 0;
 528 }
 529
 530 static inline void res_sample_init(void) {}
 531
 532 static inline int block_hists_tui_browse(struct block_hist *bh __maybe_unused,
 533                                          struct evsel *evsel __maybe_unused,
 534                                          float min_percent __maybe_unused,
 535                                          struct perf_env *env __maybe_unused,
 536                                          struct annotation_options *annotation_opts __maybe_unused)
 537 {
 538         return 0;
 539 }
 540
 541 #define K_LEFT  -1000
 542 #define K_RIGHT -2000
 543 #define K_SWITCH_INPUT_DATA -3000
 544 #define K_RELOAD -4000
 545 #endif
 546
 547 unsigned int hists__sort_list_width(struct hists *hists);
 548 unsigned int hists__overhead_width(struct hists *hists);
 549
 550 void hist__account_cycles(struct branch_stack *bs, struct addr_location *al,
 551                           struct perf_sample *sample, bool nonany_branch_mode,
 552                           u64 *total_cycles);
 553
 554 struct option;
 555 int parse_filter_percentage(const struct option *opt, const char *arg, int unset);
 556 int perf_hist_config(const char *var, const char *value);
 557
 558 void perf_hpp_list__init(struct perf_hpp_list *list);
 559
 560 enum hierarchy_move_dir {
 561         HMD_NORMAL,
 562         HMD_FORCE_SIBLING,
 563         HMD_FORCE_CHILD,
 564 };
 565
 566 struct rb_node *rb_hierarchy_last(struct rb_node *node);
 567 struct rb_node *__rb_hierarchy_next(struct rb_node *node,
 568                                     enum hierarchy_move_dir hmd);
 569 struct rb_node *rb_hierarchy_prev(struct rb_node *node);
 570
 571 static inline struct rb_node *rb_hierarchy_next(struct rb_node *node)
 572 {
 573         return __rb_hierarchy_next(node, HMD_NORMAL);
 574 }
 575
 576 #define HIERARCHY_INDENT  3
 577
 578 bool hist_entry__has_hierarchy_children(struct hist_entry *he, float limit);
 579 int hpp_color_scnprintf(struct perf_hpp *hpp, const char *fmt, ...);
 580 int __hpp__slsmg_color_printf(struct perf_hpp *hpp, const char *fmt, ...);
 581 int __hist_entry__snprintf(struct hist_entry *he, struct perf_hpp *hpp,
 582                            struct perf_hpp_list *hpp_list);
 583 int hists__fprintf_headers(struct hists *hists, FILE *fp);
 584 int __hists__scnprintf_title(struct hists *hists, char *bf, size_t size, bool show_freq);
 585
 586 static inline int hists__scnprintf_title(struct hists *hists, char *bf, size_t size)
 587 {
 588         return __hists__scnprintf_title(hists, bf, size, true);
 589 }
 590
 591 #endif  /* __PERF_HIST_H */