tools/perf/util/hist.c

   1 #include "util.h"
   2 #include "build-id.h"
   3 #include "hist.h"
   4 #include "session.h"
   5 #include "sort.h"
   6 #include "evsel.h"
   7 #include <math.h>
   8
   9 static bool hists__filter_entry_by_dso(struct hists *hists,
  10                                        struct hist_entry *he);
  11 static bool hists__filter_entry_by_thread(struct hists *hists,
  12                                           struct hist_entry *he);
  13 static bool hists__filter_entry_by_symbol(struct hists *hists,
  14                                           struct hist_entry *he);
  15
  16 struct callchain_param  callchain_param = {
  17         .mode   = CHAIN_GRAPH_REL,
  18         .min_percent = 0.5,
  19         .order  = ORDER_CALLEE,
  20         .key    = CCKEY_FUNCTION
  21 };
  22
  23 u16 hists__col_len(struct hists *hists, enum hist_column col)
  24 {
  25         return hists->col_len[col];
  26 }
  27
  28 void hists__set_col_len(struct hists *hists, enum hist_column col, u16 len)
  29 {
  30         hists->col_len[col] = len;
  31 }
  32
  33 bool hists__new_col_len(struct hists *hists, enum hist_column col, u16 len)
  34 {
  35         if (len > hists__col_len(hists, col)) {
  36                 hists__set_col_len(hists, col, len);
  37                 return true;
  38         }
  39         return false;
  40 }
  41
  42 void hists__reset_col_len(struct hists *hists)
  43 {
  44         enum hist_column col;
  45
  46         for (col = 0; col < HISTC_NR_COLS; ++col)
  47                 hists__set_col_len(hists, col, 0);
  48 }
  49
  50 static void hists__set_unres_dso_col_len(struct hists *hists, int dso)
  51 {
  52         const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
  53
  54         if (hists__col_len(hists, dso) < unresolved_col_width &&
  55             !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
  56             !symbol_conf.dso_list)
  57                 hists__set_col_len(hists, dso, unresolved_col_width);
  58 }
  59
  60 void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
  61 {
  62         const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
  63         int symlen;
  64         u16 len;
  65
  66         /*
  67          * +4 accounts for '[x] ' priv level info
  68          * +2 accounts for 0x prefix on raw addresses
  69          * +3 accounts for ' y ' symtab origin info
  70          */
  71         if (h->ms.sym) {
  72                 symlen = h->ms.sym->namelen + 4;
  73                 if (verbose)
  74                         symlen += BITS_PER_LONG / 4 + 2 + 3;
  75                 hists__new_col_len(hists, HISTC_SYMBOL, symlen);
  76         } else {
  77                 symlen = unresolved_col_width + 4 + 2;
  78                 hists__new_col_len(hists, HISTC_SYMBOL, symlen);
  79                 hists__set_unres_dso_col_len(hists, HISTC_DSO);
  80         }
  81
  82         len = thread__comm_len(h->thread);
  83         if (hists__new_col_len(hists, HISTC_COMM, len))
  84                 hists__set_col_len(hists, HISTC_THREAD, len + 6);
  85
  86         if (h->ms.map) {
  87                 len = dso__name_len(h->ms.map->dso);
  88                 hists__new_col_len(hists, HISTC_DSO, len);
  89         }
  90
  91         if (h->parent)
  92                 hists__new_col_len(hists, HISTC_PARENT, h->parent->namelen);
  93
  94         if (h->branch_info) {
  95                 if (h->branch_info->from.sym) {
  96                         symlen = (int)h->branch_info->from.sym->namelen + 4;
  97                         if (verbose)
  98                                 symlen += BITS_PER_LONG / 4 + 2 + 3;
  99                         hists__new_col_len(hists, HISTC_SYMBOL_FROM, symlen);
 100
 101                         symlen = dso__name_len(h->branch_info->from.map->dso);
 102                         hists__new_col_len(hists, HISTC_DSO_FROM, symlen);
 103                 } else {
 104                         symlen = unresolved_col_width + 4 + 2;
 105                         hists__new_col_len(hists, HISTC_SYMBOL_FROM, symlen);
 106                         hists__set_unres_dso_col_len(hists, HISTC_DSO_FROM);
 107                 }
 108
 109                 if (h->branch_info->to.sym) {
 110                         symlen = (int)h->branch_info->to.sym->namelen + 4;
 111                         if (verbose)
 112                                 symlen += BITS_PER_LONG / 4 + 2 + 3;
 113                         hists__new_col_len(hists, HISTC_SYMBOL_TO, symlen);
 114
 115                         symlen = dso__name_len(h->branch_info->to.map->dso);
 116                         hists__new_col_len(hists, HISTC_DSO_TO, symlen);
 117                 } else {
 118                         symlen = unresolved_col_width + 4 + 2;
 119                         hists__new_col_len(hists, HISTC_SYMBOL_TO, symlen);
 120                         hists__set_unres_dso_col_len(hists, HISTC_DSO_TO);
 121                 }
 122         }
 123
 124         if (h->mem_info) {
 125                 if (h->mem_info->daddr.sym) {
 126                         symlen = (int)h->mem_info->daddr.sym->namelen + 4
 127                                + unresolved_col_width + 2;
 128                         hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL,
 129                                            symlen);
 130                 } else {
 131                         symlen = unresolved_col_width + 4 + 2;
 132                         hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL,
 133                                            symlen);
 134                 }
 135                 if (h->mem_info->daddr.map) {
 136                         symlen = dso__name_len(h->mem_info->daddr.map->dso);
 137                         hists__new_col_len(hists, HISTC_MEM_DADDR_DSO,
 138                                            symlen);
 139                 } else {
 140                         symlen = unresolved_col_width + 4 + 2;
 141                         hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
 142                 }
 143         } else {
 144                 symlen = unresolved_col_width + 4 + 2;
 145                 hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL, symlen);
 146                 hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
 147         }
 148
 149         hists__new_col_len(hists, HISTC_MEM_LOCKED, 6);
 150         hists__new_col_len(hists, HISTC_MEM_TLB, 22);
 151         hists__new_col_len(hists, HISTC_MEM_SNOOP, 12);
 152         hists__new_col_len(hists, HISTC_MEM_LVL, 21 + 3);
 153         hists__new_col_len(hists, HISTC_LOCAL_WEIGHT, 12);
 154         hists__new_col_len(hists, HISTC_GLOBAL_WEIGHT, 12);
 155
 156         if (h->transaction)
 157                 hists__new_col_len(hists, HISTC_TRANSACTION,
 158                                    hist_entry__transaction_len());
 159 }
 160
 161 void hists__output_recalc_col_len(struct hists *hists, int max_rows)
 162 {
 163         struct rb_node *next = rb_first(&hists->entries);
 164         struct hist_entry *n;
 165         int row = 0;
 166
 167         hists__reset_col_len(hists);
 168
 169         while (next && row++ < max_rows) {
 170                 n = rb_entry(next, struct hist_entry, rb_node);
 171                 if (!n->filtered)
 172                         hists__calc_col_len(hists, n);
 173                 next = rb_next(&n->rb_node);
 174         }
 175 }
 176
 177 static void he_stat__add_cpumode_period(struct he_stat *he_stat,
 178                                         unsigned int cpumode, u64 period)
 179 {
 180         switch (cpumode) {
 181         case PERF_RECORD_MISC_KERNEL:
 182                 he_stat->period_sys += period;
 183                 break;
 184         case PERF_RECORD_MISC_USER:
 185                 he_stat->period_us += period;
 186                 break;
 187         case PERF_RECORD_MISC_GUEST_KERNEL:
 188                 he_stat->period_guest_sys += period;
 189                 break;
 190         case PERF_RECORD_MISC_GUEST_USER:
 191                 he_stat->period_guest_us += period;
 192                 break;
 193         default:
 194                 break;
 195         }
 196 }
 197
 198 static void he_stat__add_period(struct he_stat *he_stat, u64 period,
 199                                 u64 weight)
 200 {
 201
 202         he_stat->period         += period;
 203         he_stat->weight         += weight;
 204         he_stat->nr_events      += 1;
 205 }
 206
 207 static void he_stat__add_stat(struct he_stat *dest, struct he_stat *src)
 208 {
 209         dest->period            += src->period;
 210         dest->period_sys        += src->period_sys;
 211         dest->period_us         += src->period_us;
 212         dest->period_guest_sys  += src->period_guest_sys;
 213         dest->period_guest_us   += src->period_guest_us;
 214         dest->nr_events         += src->nr_events;
 215         dest->weight            += src->weight;
 216 }
 217
 218 static void he_stat__decay(struct he_stat *he_stat)
 219 {
 220         he_stat->period = (he_stat->period * 7) / 8;
 221         he_stat->nr_events = (he_stat->nr_events * 7) / 8;
 222         /* XXX need decay for weight too? */
 223 }
 224
 225 static bool hists__decay_entry(struct hists *hists, struct hist_entry *he)
 226 {
 227         u64 prev_period = he->stat.period;
 228
 229         if (prev_period == 0)
 230                 return true;
 231
 232         he_stat__decay(&he->stat);
 233
 234         if (!he->filtered)
 235                 hists->stats.total_period -= prev_period - he->stat.period;
 236
 237         return he->stat.period == 0;
 238 }
 239
 240 void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel)
 241 {
 242         struct rb_node *next = rb_first(&hists->entries);
 243         struct hist_entry *n;
 244
 245         while (next) {
 246                 n = rb_entry(next, struct hist_entry, rb_node);
 247                 next = rb_next(&n->rb_node);
 248                 /*
 249                  * We may be annotating this, for instance, so keep it here in
 250                  * case some it gets new samples, we'll eventually free it when
 251                  * the user stops browsing and it agains gets fully decayed.
 252                  */
 253                 if (((zap_user && n->level == '.') ||
 254                      (zap_kernel && n->level != '.') ||
 255                      hists__decay_entry(hists, n)) &&
 256                     !n->used) {
 257                         rb_erase(&n->rb_node, &hists->entries);
 258
 259                         if (sort__need_collapse)
 260                                 rb_erase(&n->rb_node_in, &hists->entries_collapsed);
 261
 262                         hist_entry__free(n);
 263                         --hists->nr_entries;
 264                 }
 265         }
 266 }
 267
 268 /*
 269  * histogram, sorted on item, collects periods
 270  */
 271
 272 static struct hist_entry *hist_entry__new(struct hist_entry *template)
 273 {
 274         size_t callchain_size = symbol_conf.use_callchain ? sizeof(struct callchain_root) : 0;
 275         struct hist_entry *he = zalloc(sizeof(*he) + callchain_size);
 276
 277         if (he != NULL) {
 278                 *he = *template;
 279
 280                 if (he->ms.map)
 281                         he->ms.map->referenced = true;
 282
 283                 if (he->branch_info) {
 284                         /*
 285                          * This branch info is (a part of) allocated from
 286                          * sample__resolve_bstack() and will be freed after
 287                          * adding new entries.  So we need to save a copy.
 288                          */
 289                         he->branch_info = malloc(sizeof(*he->branch_info));
 290                         if (he->branch_info == NULL) {
 291                                 free(he);
 292                                 return NULL;
 293                         }
 294
 295                         memcpy(he->branch_info, template->branch_info,
 296                                sizeof(*he->branch_info));
 297
 298                         if (he->branch_info->from.map)
 299                                 he->branch_info->from.map->referenced = true;
 300                         if (he->branch_info->to.map)
 301                                 he->branch_info->to.map->referenced = true;
 302                 }
 303
 304                 if (he->mem_info) {
 305                         if (he->mem_info->iaddr.map)
 306                                 he->mem_info->iaddr.map->referenced = true;
 307                         if (he->mem_info->daddr.map)
 308                                 he->mem_info->daddr.map->referenced = true;
 309                 }
 310
 311                 if (symbol_conf.use_callchain)
 312                         callchain_init(he->callchain);
 313
 314                 INIT_LIST_HEAD(&he->pairs.node);
 315         }
 316
 317         return he;
 318 }
 319
 320 void hists__inc_nr_entries(struct hists *hists, struct hist_entry *h)
 321 {
 322         if (!h->filtered) {
 323                 hists__calc_col_len(hists, h);
 324                 ++hists->nr_entries;
 325                 hists->stats.total_period += h->stat.period;
 326         }
 327 }
 328
 329 static u8 symbol__parent_filter(const struct symbol *parent)
 330 {
 331         if (symbol_conf.exclude_other && parent == NULL)
 332                 return 1 << HIST_FILTER__PARENT;
 333         return 0;
 334 }
 335
 336 static struct hist_entry *add_hist_entry(struct hists *hists,
 337                                          struct hist_entry *entry,
 338                                          struct addr_location *al)
 339 {
 340         struct rb_node **p;
 341         struct rb_node *parent = NULL;
 342         struct hist_entry *he;
 343         int64_t cmp;
 344         u64 period = entry->stat.period;
 345         u64 weight = entry->stat.weight;
 346
 347         p = &hists->entries_in->rb_node;
 348
 349         while (*p != NULL) {
 350                 parent = *p;
 351                 he = rb_entry(parent, struct hist_entry, rb_node_in);
 352
 353                 /*
 354                  * Make sure that it receives arguments in a same order as
 355                  * hist_entry__collapse() so that we can use an appropriate
 356                  * function when searching an entry regardless which sort
 357                  * keys were used.
 358                  */
 359                 cmp = hist_entry__cmp(he, entry);
 360
 361                 if (!cmp) {
 362                         he_stat__add_period(&he->stat, period, weight);
 363
 364                         /*
 365                          * This mem info was allocated from sample__resolve_mem
 366                          * and will not be used anymore.
 367                          */
 368                         zfree(&entry->mem_info);
 369
 370                         /* If the map of an existing hist_entry has
 371                          * become out-of-date due to an exec() or
 372                          * similar, update it.  Otherwise we will
 373                          * mis-adjust symbol addresses when computing
 374                          * the history counter to increment.
 375                          */
 376                         if (he->ms.map != entry->ms.map) {
 377                                 he->ms.map = entry->ms.map;
 378                                 if (he->ms.map)
 379                                         he->ms.map->referenced = true;
 380                         }
 381                         goto out;
 382                 }
 383
 384                 if (cmp < 0)
 385                         p = &(*p)->rb_left;
 386                 else
 387                         p = &(*p)->rb_right;
 388         }
 389
 390         he = hist_entry__new(entry);
 391         if (!he)
 392                 return NULL;
 393
 394         hists->nr_entries++;
 395         rb_link_node(&he->rb_node_in, parent, p);
 396         rb_insert_color(&he->rb_node_in, hists->entries_in);
 397 out:
 398         he_stat__add_cpumode_period(&he->stat, al->cpumode, period);
 399         return he;
 400 }
 401
 402 struct hist_entry *__hists__add_entry(struct hists *hists,
 403                                       struct addr_location *al,
 404                                       struct symbol *sym_parent,
 405                                       struct branch_info *bi,
 406                                       struct mem_info *mi,
 407                                       u64 period, u64 weight, u64 transaction)
 408 {
 409         struct hist_entry entry = {
 410                 .thread = al->thread,
 411                 .comm = thread__comm(al->thread),
 412                 .ms = {
 413                         .map    = al->map,
 414                         .sym    = al->sym,
 415                 },
 416                 .cpu    = al->cpu,
 417                 .ip     = al->addr,
 418                 .level  = al->level,
 419                 .stat = {
 420                         .nr_events = 1,
 421                         .period = period,
 422                         .weight = weight,
 423                 },
 424                 .parent = sym_parent,
 425                 .filtered = symbol__parent_filter(sym_parent),
 426                 .hists  = hists,
 427                 .branch_info = bi,
 428                 .mem_info = mi,
 429                 .transaction = transaction,
 430         };
 431
 432         return add_hist_entry(hists, &entry, al);
 433 }
 434
 435 int64_t
 436 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
 437 {
 438         struct sort_entry *se;
 439         int64_t cmp = 0;
 440
 441         list_for_each_entry(se, &hist_entry__sort_list, list) {
 442                 cmp = se->se_cmp(left, right);
 443                 if (cmp)
 444                         break;
 445         }
 446
 447         return cmp;
 448 }
 449
 450 int64_t
 451 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
 452 {
 453         struct sort_entry *se;
 454         int64_t cmp = 0;
 455
 456         list_for_each_entry(se, &hist_entry__sort_list, list) {
 457                 int64_t (*f)(struct hist_entry *, struct hist_entry *);
 458
 459                 f = se->se_collapse ?: se->se_cmp;
 460
 461                 cmp = f(left, right);
 462                 if (cmp)
 463                         break;
 464         }
 465
 466         return cmp;
 467 }
 468
 469 void hist_entry__free(struct hist_entry *he)
 470 {
 471         zfree(&he->branch_info);
 472         zfree(&he->mem_info);
 473         free_srcline(he->srcline);
 474         free(he);
 475 }
 476
 477 /*
 478  * collapse the histogram
 479  */
 480
 481 static bool hists__collapse_insert_entry(struct hists *hists __maybe_unused,
 482                                          struct rb_root *root,
 483                                          struct hist_entry *he)
 484 {
 485         struct rb_node **p = &root->rb_node;
 486         struct rb_node *parent = NULL;
 487         struct hist_entry *iter;
 488         int64_t cmp;
 489
 490         while (*p != NULL) {
 491                 parent = *p;
 492                 iter = rb_entry(parent, struct hist_entry, rb_node_in);
 493
 494                 cmp = hist_entry__collapse(iter, he);
 495
 496                 if (!cmp) {
 497                         he_stat__add_stat(&iter->stat, &he->stat);
 498
 499                         if (symbol_conf.use_callchain) {
 500                                 callchain_cursor_reset(&callchain_cursor);
 501                                 callchain_merge(&callchain_cursor,
 502                                                 iter->callchain,
 503                                                 he->callchain);
 504                         }
 505                         hist_entry__free(he);
 506                         return false;
 507                 }
 508
 509                 if (cmp < 0)
 510                         p = &(*p)->rb_left;
 511                 else
 512                         p = &(*p)->rb_right;
 513         }
 514
 515         rb_link_node(&he->rb_node_in, parent, p);
 516         rb_insert_color(&he->rb_node_in, root);
 517         return true;
 518 }
 519
 520 static struct rb_root *hists__get_rotate_entries_in(struct hists *hists)
 521 {
 522         struct rb_root *root;
 523
 524         pthread_mutex_lock(&hists->lock);
 525
 526         root = hists->entries_in;
 527         if (++hists->entries_in > &hists->entries_in_array[1])
 528                 hists->entries_in = &hists->entries_in_array[0];
 529
 530         pthread_mutex_unlock(&hists->lock);
 531
 532         return root;
 533 }
 534
 535 static void hists__apply_filters(struct hists *hists, struct hist_entry *he)
 536 {
 537         hists__filter_entry_by_dso(hists, he);
 538         hists__filter_entry_by_thread(hists, he);
 539         hists__filter_entry_by_symbol(hists, he);
 540 }
 541
 542 void hists__collapse_resort(struct hists *hists, struct ui_progress *prog)
 543 {
 544         struct rb_root *root;
 545         struct rb_node *next;
 546         struct hist_entry *n;
 547
 548         if (!sort__need_collapse)
 549                 return;
 550
 551         root = hists__get_rotate_entries_in(hists);
 552         next = rb_first(root);
 553
 554         while (next) {
 555                 if (session_done())
 556                         break;
 557                 n = rb_entry(next, struct hist_entry, rb_node_in);
 558                 next = rb_next(&n->rb_node_in);
 559
 560                 rb_erase(&n->rb_node_in, root);
 561                 if (hists__collapse_insert_entry(hists, &hists->entries_collapsed, n)) {
 562                         /*
 563                          * If it wasn't combined with one of the entries already
 564                          * collapsed, we need to apply the filters that may have
 565                          * been set by, say, the hist_browser.
 566                          */
 567                         hists__apply_filters(hists, n);
 568                 }
 569                 if (prog)
 570                         ui_progress__update(prog, 1);
 571         }
 572 }
 573
 574 /*
 575  * reverse the map, sort on period.
 576  */
 577
 578 static int period_cmp(u64 period_a, u64 period_b)
 579 {
 580         if (period_a > period_b)
 581                 return 1;
 582         if (period_a < period_b)
 583                 return -1;
 584         return 0;
 585 }
 586
 587 static int hist_entry__sort_on_period(struct hist_entry *a,
 588                                       struct hist_entry *b)
 589 {
 590         int ret;
 591         int i, nr_members;
 592         struct perf_evsel *evsel;
 593         struct hist_entry *pair;
 594         u64 *periods_a, *periods_b;
 595
 596         ret = period_cmp(a->stat.period, b->stat.period);
 597         if (ret || !symbol_conf.event_group)
 598                 return ret;
 599
 600         evsel = hists_to_evsel(a->hists);
 601         nr_members = evsel->nr_members;
 602         if (nr_members <= 1)
 603                 return ret;
 604
 605         periods_a = zalloc(sizeof(periods_a) * nr_members);
 606         periods_b = zalloc(sizeof(periods_b) * nr_members);
 607
 608         if (!periods_a || !periods_b)
 609                 goto out;
 610
 611         list_for_each_entry(pair, &a->pairs.head, pairs.node) {
 612                 evsel = hists_to_evsel(pair->hists);
 613                 periods_a[perf_evsel__group_idx(evsel)] = pair->stat.period;
 614         }
 615
 616         list_for_each_entry(pair, &b->pairs.head, pairs.node) {
 617                 evsel = hists_to_evsel(pair->hists);
 618                 periods_b[perf_evsel__group_idx(evsel)] = pair->stat.period;
 619         }
 620
 621         for (i = 1; i < nr_members; i++) {
 622                 ret = period_cmp(periods_a[i], periods_b[i]);
 623                 if (ret)
 624                         break;
 625         }
 626
 627 out:
 628         free(periods_a);
 629         free(periods_b);
 630
 631         return ret;
 632 }
 633
 634 static void __hists__insert_output_entry(struct rb_root *entries,
 635                                          struct hist_entry *he,
 636                                          u64 min_callchain_hits)
 637 {
 638         struct rb_node **p = &entries->rb_node;
 639         struct rb_node *parent = NULL;
 640         struct hist_entry *iter;
 641
 642         if (symbol_conf.use_callchain)
 643                 callchain_param.sort(&he->sorted_chain, he->callchain,
 644                                       min_callchain_hits, &callchain_param);
 645
 646         while (*p != NULL) {
 647                 parent = *p;
 648                 iter = rb_entry(parent, struct hist_entry, rb_node);
 649
 650                 if (hist_entry__sort_on_period(he, iter) > 0)
 651                         p = &(*p)->rb_left;
 652                 else
 653                         p = &(*p)->rb_right;
 654         }
 655
 656         rb_link_node(&he->rb_node, parent, p);
 657         rb_insert_color(&he->rb_node, entries);
 658 }
 659
 660 void hists__output_resort(struct hists *hists)
 661 {
 662         struct rb_root *root;
 663         struct rb_node *next;
 664         struct hist_entry *n;
 665         u64 min_callchain_hits;
 666
 667         min_callchain_hits = hists->stats.total_period * (callchain_param.min_percent / 100);
 668
 669         if (sort__need_collapse)
 670                 root = &hists->entries_collapsed;
 671         else
 672                 root = hists->entries_in;
 673
 674         next = rb_first(root);
 675         hists->entries = RB_ROOT;
 676
 677         hists->nr_entries = 0;
 678         hists->stats.total_period = 0;
 679         hists__reset_col_len(hists);
 680
 681         while (next) {
 682                 n = rb_entry(next, struct hist_entry, rb_node_in);
 683                 next = rb_next(&n->rb_node_in);
 684
 685                 __hists__insert_output_entry(&hists->entries, n, min_callchain_hits);
 686                 hists__inc_nr_entries(hists, n);
 687         }
 688 }
 689
 690 static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *h,
 691                                        enum hist_filter filter)
 692 {
 693         h->filtered &= ~(1 << filter);
 694         if (h->filtered)
 695                 return;
 696
 697         ++hists->nr_entries;
 698         if (h->ms.unfolded)
 699                 hists->nr_entries += h->nr_rows;
 700         h->row_offset = 0;
 701         hists->stats.total_period += h->stat.period;
 702         hists->stats.nr_events[PERF_RECORD_SAMPLE] += h->stat.nr_events;
 703
 704         hists__calc_col_len(hists, h);
 705 }
 706
 707
 708 static bool hists__filter_entry_by_dso(struct hists *hists,
 709                                        struct hist_entry *he)
 710 {
 711         if (hists->dso_filter != NULL &&
 712             (he->ms.map == NULL || he->ms.map->dso != hists->dso_filter)) {
 713                 he->filtered |= (1 << HIST_FILTER__DSO);
 714                 return true;
 715         }
 716
 717         return false;
 718 }
 719
 720 void hists__filter_by_dso(struct hists *hists)
 721 {
 722         struct rb_node *nd;
 723
 724         hists->nr_entries = hists->stats.total_period = 0;
 725         hists->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
 726         hists__reset_col_len(hists);
 727
 728         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 729                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 730
 731                 if (symbol_conf.exclude_other && !h->parent)
 732                         continue;
 733
 734                 if (hists__filter_entry_by_dso(hists, h))
 735                         continue;
 736
 737                 hists__remove_entry_filter(hists, h, HIST_FILTER__DSO);
 738         }
 739 }
 740
 741 static bool hists__filter_entry_by_thread(struct hists *hists,
 742                                           struct hist_entry *he)
 743 {
 744         if (hists->thread_filter != NULL &&
 745             he->thread != hists->thread_filter) {
 746                 he->filtered |= (1 << HIST_FILTER__THREAD);
 747                 return true;
 748         }
 749
 750         return false;
 751 }
 752
 753 void hists__filter_by_thread(struct hists *hists)
 754 {
 755         struct rb_node *nd;
 756
 757         hists->nr_entries = hists->stats.total_period = 0;
 758         hists->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
 759         hists__reset_col_len(hists);
 760
 761         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 762                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 763
 764                 if (hists__filter_entry_by_thread(hists, h))
 765                         continue;
 766
 767                 hists__remove_entry_filter(hists, h, HIST_FILTER__THREAD);
 768         }
 769 }
 770
 771 static bool hists__filter_entry_by_symbol(struct hists *hists,
 772                                           struct hist_entry *he)
 773 {
 774         if (hists->symbol_filter_str != NULL &&
 775             (!he->ms.sym || strstr(he->ms.sym->name,
 776                                    hists->symbol_filter_str) == NULL)) {
 777                 he->filtered |= (1 << HIST_FILTER__SYMBOL);
 778                 return true;
 779         }
 780
 781         return false;
 782 }
 783
 784 void hists__filter_by_symbol(struct hists *hists)
 785 {
 786         struct rb_node *nd;
 787
 788         hists->nr_entries = hists->stats.total_period = 0;
 789         hists->stats.nr_events[PERF_RECORD_SAMPLE] = 0;
 790         hists__reset_col_len(hists);
 791
 792         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
 793                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
 794
 795                 if (hists__filter_entry_by_symbol(hists, h))
 796                         continue;
 797
 798                 hists__remove_entry_filter(hists, h, HIST_FILTER__SYMBOL);
 799         }
 800 }
 801
 802 void events_stats__inc(struct events_stats *stats, u32 type)
 803 {
 804         ++stats->nr_events[0];
 805         ++stats->nr_events[type];
 806 }
 807
 808 void hists__inc_nr_events(struct hists *hists, u32 type)
 809 {
 810         events_stats__inc(&hists->stats, type);
 811 }
 812
 813 static struct hist_entry *hists__add_dummy_entry(struct hists *hists,
 814                                                  struct hist_entry *pair)
 815 {
 816         struct rb_root *root;
 817         struct rb_node **p;
 818         struct rb_node *parent = NULL;
 819         struct hist_entry *he;
 820         int64_t cmp;
 821
 822         if (sort__need_collapse)
 823                 root = &hists->entries_collapsed;
 824         else
 825                 root = hists->entries_in;
 826
 827         p = &root->rb_node;
 828
 829         while (*p != NULL) {
 830                 parent = *p;
 831                 he = rb_entry(parent, struct hist_entry, rb_node_in);
 832
 833                 cmp = hist_entry__collapse(he, pair);
 834
 835                 if (!cmp)
 836                         goto out;
 837
 838                 if (cmp < 0)
 839                         p = &(*p)->rb_left;
 840                 else
 841                         p = &(*p)->rb_right;
 842         }
 843
 844         he = hist_entry__new(pair);
 845         if (he) {
 846                 memset(&he->stat, 0, sizeof(he->stat));
 847                 he->hists = hists;
 848                 rb_link_node(&he->rb_node_in, parent, p);
 849                 rb_insert_color(&he->rb_node_in, root);
 850                 hists__inc_nr_entries(hists, he);
 851                 he->dummy = true;
 852         }
 853 out:
 854         return he;
 855 }
 856
 857 static struct hist_entry *hists__find_entry(struct hists *hists,
 858                                             struct hist_entry *he)
 859 {
 860         struct rb_node *n;
 861
 862         if (sort__need_collapse)
 863                 n = hists->entries_collapsed.rb_node;
 864         else
 865                 n = hists->entries_in->rb_node;
 866
 867         while (n) {
 868                 struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node_in);
 869                 int64_t cmp = hist_entry__collapse(iter, he);
 870
 871                 if (cmp < 0)
 872                         n = n->rb_left;
 873                 else if (cmp > 0)
 874                         n = n->rb_right;
 875                 else
 876                         return iter;
 877         }
 878
 879         return NULL;
 880 }
 881
 882 /*
 883  * Look for pairs to link to the leader buckets (hist_entries):
 884  */
 885 void hists__match(struct hists *leader, struct hists *other)
 886 {
 887         struct rb_root *root;
 888         struct rb_node *nd;
 889         struct hist_entry *pos, *pair;
 890
 891         if (sort__need_collapse)
 892                 root = &leader->entries_collapsed;
 893         else
 894                 root = leader->entries_in;
 895
 896         for (nd = rb_first(root); nd; nd = rb_next(nd)) {
 897                 pos  = rb_entry(nd, struct hist_entry, rb_node_in);
 898                 pair = hists__find_entry(other, pos);
 899
 900                 if (pair)
 901                         hist_entry__add_pair(pair, pos);
 902         }
 903 }
 904
 905 /*
 906  * Look for entries in the other hists that are not present in the leader, if
 907  * we find them, just add a dummy entry on the leader hists, with period=0,
 908  * nr_events=0, to serve as the list header.
 909  */
 910 int hists__link(struct hists *leader, struct hists *other)
 911 {
 912         struct rb_root *root;
 913         struct rb_node *nd;
 914         struct hist_entry *pos, *pair;
 915
 916         if (sort__need_collapse)
 917                 root = &other->entries_collapsed;
 918         else
 919                 root = other->entries_in;
 920
 921         for (nd = rb_first(root); nd; nd = rb_next(nd)) {
 922                 pos = rb_entry(nd, struct hist_entry, rb_node_in);
 923
 924                 if (!hist_entry__has_pairs(pos)) {
 925                         pair = hists__add_dummy_entry(leader, pos);
 926                         if (pair == NULL)
 927                                 return -1;
 928                         hist_entry__add_pair(pos, pair);
 929                 }
 930         }
 931
 932         return 0;
 933 }