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 "evlist.h"
   7 #include "evsel.h"
   8 #include "annotate.h"
   9 #include "ui/progress.h"
  10 #include <math.h>
  11
  12 static bool hists__filter_entry_by_dso(struct hists *hists,
  13                                        struct hist_entry *he);
  14 static bool hists__filter_entry_by_thread(struct hists *hists,
  15                                           struct hist_entry *he);
  16 static bool hists__filter_entry_by_symbol(struct hists *hists,
  17                                           struct hist_entry *he);
  18 static bool hists__filter_entry_by_socket(struct hists *hists,
  19                                           struct hist_entry *he);
  20
  21 u16 hists__col_len(struct hists *hists, enum hist_column col)
  22 {
  23         return hists->col_len[col];
  24 }
  25
  26 void hists__set_col_len(struct hists *hists, enum hist_column col, u16 len)
  27 {
  28         hists->col_len[col] = len;
  29 }
  30
  31 bool hists__new_col_len(struct hists *hists, enum hist_column col, u16 len)
  32 {
  33         if (len > hists__col_len(hists, col)) {
  34                 hists__set_col_len(hists, col, len);
  35                 return true;
  36         }
  37         return false;
  38 }
  39
  40 void hists__reset_col_len(struct hists *hists)
  41 {
  42         enum hist_column col;
  43
  44         for (col = 0; col < HISTC_NR_COLS; ++col)
  45                 hists__set_col_len(hists, col, 0);
  46 }
  47
  48 static void hists__set_unres_dso_col_len(struct hists *hists, int dso)
  49 {
  50         const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
  51
  52         if (hists__col_len(hists, dso) < unresolved_col_width &&
  53             !symbol_conf.col_width_list_str && !symbol_conf.field_sep &&
  54             !symbol_conf.dso_list)
  55                 hists__set_col_len(hists, dso, unresolved_col_width);
  56 }
  57
  58 void hists__calc_col_len(struct hists *hists, struct hist_entry *h)
  59 {
  60         const unsigned int unresolved_col_width = BITS_PER_LONG / 4;
  61         int symlen;
  62         u16 len;
  63
  64         /*
  65          * +4 accounts for '[x] ' priv level info
  66          * +2 accounts for 0x prefix on raw addresses
  67          * +3 accounts for ' y ' symtab origin info
  68          */
  69         if (h->ms.sym) {
  70                 symlen = h->ms.sym->namelen + 4;
  71                 if (verbose)
  72                         symlen += BITS_PER_LONG / 4 + 2 + 3;
  73                 hists__new_col_len(hists, HISTC_SYMBOL, symlen);
  74         } else {
  75                 symlen = unresolved_col_width + 4 + 2;
  76                 hists__new_col_len(hists, HISTC_SYMBOL, symlen);
  77                 hists__set_unres_dso_col_len(hists, HISTC_DSO);
  78         }
  79
  80         len = thread__comm_len(h->thread);
  81         if (hists__new_col_len(hists, HISTC_COMM, len))
  82                 hists__set_col_len(hists, HISTC_THREAD, len + 8);
  83
  84         if (h->ms.map) {
  85                 len = dso__name_len(h->ms.map->dso);
  86                 hists__new_col_len(hists, HISTC_DSO, len);
  87         }
  88
  89         if (h->parent)
  90                 hists__new_col_len(hists, HISTC_PARENT, h->parent->namelen);
  91
  92         if (h->branch_info) {
  93                 if (h->branch_info->from.sym) {
  94                         symlen = (int)h->branch_info->from.sym->namelen + 4;
  95                         if (verbose)
  96                                 symlen += BITS_PER_LONG / 4 + 2 + 3;
  97                         hists__new_col_len(hists, HISTC_SYMBOL_FROM, symlen);
  98
  99                         symlen = dso__name_len(h->branch_info->from.map->dso);
 100                         hists__new_col_len(hists, HISTC_DSO_FROM, symlen);
 101                 } else {
 102                         symlen = unresolved_col_width + 4 + 2;
 103                         hists__new_col_len(hists, HISTC_SYMBOL_FROM, symlen);
 104                         hists__set_unres_dso_col_len(hists, HISTC_DSO_FROM);
 105                 }
 106
 107                 if (h->branch_info->to.sym) {
 108                         symlen = (int)h->branch_info->to.sym->namelen + 4;
 109                         if (verbose)
 110                                 symlen += BITS_PER_LONG / 4 + 2 + 3;
 111                         hists__new_col_len(hists, HISTC_SYMBOL_TO, symlen);
 112
 113                         symlen = dso__name_len(h->branch_info->to.map->dso);
 114                         hists__new_col_len(hists, HISTC_DSO_TO, symlen);
 115                 } else {
 116                         symlen = unresolved_col_width + 4 + 2;
 117                         hists__new_col_len(hists, HISTC_SYMBOL_TO, symlen);
 118                         hists__set_unres_dso_col_len(hists, HISTC_DSO_TO);
 119                 }
 120
 121                 if (h->branch_info->srcline_from)
 122                         hists__new_col_len(hists, HISTC_SRCLINE_FROM,
 123                                         strlen(h->branch_info->srcline_from));
 124                 if (h->branch_info->srcline_to)
 125                         hists__new_col_len(hists, HISTC_SRCLINE_TO,
 126                                         strlen(h->branch_info->srcline_to));
 127         }
 128
 129         if (h->mem_info) {
 130                 if (h->mem_info->daddr.sym) {
 131                         symlen = (int)h->mem_info->daddr.sym->namelen + 4
 132                                + unresolved_col_width + 2;
 133                         hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL,
 134                                            symlen);
 135                         hists__new_col_len(hists, HISTC_MEM_DCACHELINE,
 136                                            symlen + 1);
 137                 } else {
 138                         symlen = unresolved_col_width + 4 + 2;
 139                         hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL,
 140                                            symlen);
 141                         hists__new_col_len(hists, HISTC_MEM_DCACHELINE,
 142                                            symlen);
 143                 }
 144
 145                 if (h->mem_info->iaddr.sym) {
 146                         symlen = (int)h->mem_info->iaddr.sym->namelen + 4
 147                                + unresolved_col_width + 2;
 148                         hists__new_col_len(hists, HISTC_MEM_IADDR_SYMBOL,
 149                                            symlen);
 150                 } else {
 151                         symlen = unresolved_col_width + 4 + 2;
 152                         hists__new_col_len(hists, HISTC_MEM_IADDR_SYMBOL,
 153                                            symlen);
 154                 }
 155
 156                 if (h->mem_info->daddr.map) {
 157                         symlen = dso__name_len(h->mem_info->daddr.map->dso);
 158                         hists__new_col_len(hists, HISTC_MEM_DADDR_DSO,
 159                                            symlen);
 160                 } else {
 161                         symlen = unresolved_col_width + 4 + 2;
 162                         hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
 163                 }
 164         } else {
 165                 symlen = unresolved_col_width + 4 + 2;
 166                 hists__new_col_len(hists, HISTC_MEM_DADDR_SYMBOL, symlen);
 167                 hists__new_col_len(hists, HISTC_MEM_IADDR_SYMBOL, symlen);
 168                 hists__set_unres_dso_col_len(hists, HISTC_MEM_DADDR_DSO);
 169         }
 170
 171         hists__new_col_len(hists, HISTC_CPU, 3);
 172         hists__new_col_len(hists, HISTC_SOCKET, 6);
 173         hists__new_col_len(hists, HISTC_MEM_LOCKED, 6);
 174         hists__new_col_len(hists, HISTC_MEM_TLB, 22);
 175         hists__new_col_len(hists, HISTC_MEM_SNOOP, 12);
 176         hists__new_col_len(hists, HISTC_MEM_LVL, 21 + 3);
 177         hists__new_col_len(hists, HISTC_LOCAL_WEIGHT, 12);
 178         hists__new_col_len(hists, HISTC_GLOBAL_WEIGHT, 12);
 179
 180         if (h->srcline) {
 181                 len = MAX(strlen(h->srcline), strlen(sort_srcline.se_header));
 182                 hists__new_col_len(hists, HISTC_SRCLINE, len);
 183         }
 184
 185         if (h->srcfile)
 186                 hists__new_col_len(hists, HISTC_SRCFILE, strlen(h->srcfile));
 187
 188         if (h->transaction)
 189                 hists__new_col_len(hists, HISTC_TRANSACTION,
 190                                    hist_entry__transaction_len());
 191
 192         if (h->trace_output)
 193                 hists__new_col_len(hists, HISTC_TRACE, strlen(h->trace_output));
 194 }
 195
 196 void hists__output_recalc_col_len(struct hists *hists, int max_rows)
 197 {
 198         struct rb_node *next = rb_first(&hists->entries);
 199         struct hist_entry *n;
 200         int row = 0;
 201
 202         hists__reset_col_len(hists);
 203
 204         while (next && row++ < max_rows) {
 205                 n = rb_entry(next, struct hist_entry, rb_node);
 206                 if (!n->filtered)
 207                         hists__calc_col_len(hists, n);
 208                 next = rb_next(&n->rb_node);
 209         }
 210 }
 211
 212 static void he_stat__add_cpumode_period(struct he_stat *he_stat,
 213                                         unsigned int cpumode, u64 period)
 214 {
 215         switch (cpumode) {
 216         case PERF_RECORD_MISC_KERNEL:
 217                 he_stat->period_sys += period;
 218                 break;
 219         case PERF_RECORD_MISC_USER:
 220                 he_stat->period_us += period;
 221                 break;
 222         case PERF_RECORD_MISC_GUEST_KERNEL:
 223                 he_stat->period_guest_sys += period;
 224                 break;
 225         case PERF_RECORD_MISC_GUEST_USER:
 226                 he_stat->period_guest_us += period;
 227                 break;
 228         default:
 229                 break;
 230         }
 231 }
 232
 233 static void he_stat__add_period(struct he_stat *he_stat, u64 period,
 234                                 u64 weight)
 235 {
 236
 237         he_stat->period         += period;
 238         he_stat->weight         += weight;
 239         he_stat->nr_events      += 1;
 240 }
 241
 242 static void he_stat__add_stat(struct he_stat *dest, struct he_stat *src)
 243 {
 244         dest->period            += src->period;
 245         dest->period_sys        += src->period_sys;
 246         dest->period_us         += src->period_us;
 247         dest->period_guest_sys  += src->period_guest_sys;
 248         dest->period_guest_us   += src->period_guest_us;
 249         dest->nr_events         += src->nr_events;
 250         dest->weight            += src->weight;
 251 }
 252
 253 static void he_stat__decay(struct he_stat *he_stat)
 254 {
 255         he_stat->period = (he_stat->period * 7) / 8;
 256         he_stat->nr_events = (he_stat->nr_events * 7) / 8;
 257         /* XXX need decay for weight too? */
 258 }
 259
 260 static void hists__delete_entry(struct hists *hists, struct hist_entry *he);
 261
 262 static bool hists__decay_entry(struct hists *hists, struct hist_entry *he)
 263 {
 264         u64 prev_period = he->stat.period;
 265         u64 diff;
 266
 267         if (prev_period == 0)
 268                 return true;
 269
 270         he_stat__decay(&he->stat);
 271         if (symbol_conf.cumulate_callchain)
 272                 he_stat__decay(he->stat_acc);
 273         decay_callchain(he->callchain);
 274
 275         diff = prev_period - he->stat.period;
 276
 277         if (!he->depth) {
 278                 hists->stats.total_period -= diff;
 279                 if (!he->filtered)
 280                         hists->stats.total_non_filtered_period -= diff;
 281         }
 282
 283         if (!he->leaf) {
 284                 struct hist_entry *child;
 285                 struct rb_node *node = rb_first(&he->hroot_out);
 286                 while (node) {
 287                         child = rb_entry(node, struct hist_entry, rb_node);
 288                         node = rb_next(node);
 289
 290                         if (hists__decay_entry(hists, child))
 291                                 hists__delete_entry(hists, child);
 292                 }
 293         }
 294
 295         return he->stat.period == 0;
 296 }
 297
 298 static void hists__delete_entry(struct hists *hists, struct hist_entry *he)
 299 {
 300         struct rb_root *root_in;
 301         struct rb_root *root_out;
 302
 303         if (he->parent_he) {
 304                 root_in  = &he->parent_he->hroot_in;
 305                 root_out = &he->parent_he->hroot_out;
 306         } else {
 307                 if (hists__has(hists, need_collapse))
 308                         root_in = &hists->entries_collapsed;
 309                 else
 310                         root_in = hists->entries_in;
 311                 root_out = &hists->entries;
 312         }
 313
 314         rb_erase(&he->rb_node_in, root_in);
 315         rb_erase(&he->rb_node, root_out);
 316
 317         --hists->nr_entries;
 318         if (!he->filtered)
 319                 --hists->nr_non_filtered_entries;
 320
 321         hist_entry__delete(he);
 322 }
 323
 324 void hists__decay_entries(struct hists *hists, bool zap_user, bool zap_kernel)
 325 {
 326         struct rb_node *next = rb_first(&hists->entries);
 327         struct hist_entry *n;
 328
 329         while (next) {
 330                 n = rb_entry(next, struct hist_entry, rb_node);
 331                 next = rb_next(&n->rb_node);
 332                 if (((zap_user && n->level == '.') ||
 333                      (zap_kernel && n->level != '.') ||
 334                      hists__decay_entry(hists, n))) {
 335                         hists__delete_entry(hists, n);
 336                 }
 337         }
 338 }
 339
 340 void hists__delete_entries(struct hists *hists)
 341 {
 342         struct rb_node *next = rb_first(&hists->entries);
 343         struct hist_entry *n;
 344
 345         while (next) {
 346                 n = rb_entry(next, struct hist_entry, rb_node);
 347                 next = rb_next(&n->rb_node);
 348
 349                 hists__delete_entry(hists, n);
 350         }
 351 }
 352
 353 /*
 354  * histogram, sorted on item, collects periods
 355  */
 356
 357 static int hist_entry__init(struct hist_entry *he,
 358                             struct hist_entry *template,
 359                             bool sample_self)
 360 {
 361         *he = *template;
 362
 363         if (symbol_conf.cumulate_callchain) {
 364                 he->stat_acc = malloc(sizeof(he->stat));
 365                 if (he->stat_acc == NULL)
 366                         return -ENOMEM;
 367                 memcpy(he->stat_acc, &he->stat, sizeof(he->stat));
 368                 if (!sample_self)
 369                         memset(&he->stat, 0, sizeof(he->stat));
 370         }
 371
 372         map__get(he->ms.map);
 373
 374         if (he->branch_info) {
 375                 /*
 376                  * This branch info is (a part of) allocated from
 377                  * sample__resolve_bstack() and will be freed after
 378                  * adding new entries.  So we need to save a copy.
 379                  */
 380                 he->branch_info = malloc(sizeof(*he->branch_info));
 381                 if (he->branch_info == NULL) {
 382                         map__zput(he->ms.map);
 383                         free(he->stat_acc);
 384                         return -ENOMEM;
 385                 }
 386
 387                 memcpy(he->branch_info, template->branch_info,
 388                        sizeof(*he->branch_info));
 389
 390                 map__get(he->branch_info->from.map);
 391                 map__get(he->branch_info->to.map);
 392         }
 393
 394         if (he->mem_info) {
 395                 map__get(he->mem_info->iaddr.map);
 396                 map__get(he->mem_info->daddr.map);
 397         }
 398
 399         if (symbol_conf.use_callchain)
 400                 callchain_init(he->callchain);
 401
 402         if (he->raw_data) {
 403                 he->raw_data = memdup(he->raw_data, he->raw_size);
 404
 405                 if (he->raw_data == NULL) {
 406                         map__put(he->ms.map);
 407                         if (he->branch_info) {
 408                                 map__put(he->branch_info->from.map);
 409                                 map__put(he->branch_info->to.map);
 410                                 free(he->branch_info);
 411                         }
 412                         if (he->mem_info) {
 413                                 map__put(he->mem_info->iaddr.map);
 414                                 map__put(he->mem_info->daddr.map);
 415                         }
 416                         free(he->stat_acc);
 417                         return -ENOMEM;
 418                 }
 419         }
 420         INIT_LIST_HEAD(&he->pairs.node);
 421         thread__get(he->thread);
 422         he->hroot_in  = RB_ROOT;
 423         he->hroot_out = RB_ROOT;
 424
 425         if (!symbol_conf.report_hierarchy)
 426                 he->leaf = true;
 427
 428         return 0;
 429 }
 430
 431 static void *hist_entry__zalloc(size_t size)
 432 {
 433         return zalloc(size + sizeof(struct hist_entry));
 434 }
 435
 436 static void hist_entry__free(void *ptr)
 437 {
 438         free(ptr);
 439 }
 440
 441 static struct hist_entry_ops default_ops = {
 442         .new    = hist_entry__zalloc,
 443         .free   = hist_entry__free,
 444 };
 445
 446 static struct hist_entry *hist_entry__new(struct hist_entry *template,
 447                                           bool sample_self)
 448 {
 449         struct hist_entry_ops *ops = template->ops;
 450         size_t callchain_size = 0;
 451         struct hist_entry *he;
 452         int err = 0;
 453
 454         if (!ops)
 455                 ops = template->ops = &default_ops;
 456
 457         if (symbol_conf.use_callchain)
 458                 callchain_size = sizeof(struct callchain_root);
 459
 460         he = ops->new(callchain_size);
 461         if (he) {
 462                 err = hist_entry__init(he, template, sample_self);
 463                 if (err) {
 464                         ops->free(he);
 465                         he = NULL;
 466                 }
 467         }
 468
 469         return he;
 470 }
 471
 472 static u8 symbol__parent_filter(const struct symbol *parent)
 473 {
 474         if (symbol_conf.exclude_other && parent == NULL)
 475                 return 1 << HIST_FILTER__PARENT;
 476         return 0;
 477 }
 478
 479 static void hist_entry__add_callchain_period(struct hist_entry *he, u64 period)
 480 {
 481         if (!symbol_conf.use_callchain)
 482                 return;
 483
 484         he->hists->callchain_period += period;
 485         if (!he->filtered)
 486                 he->hists->callchain_non_filtered_period += period;
 487 }
 488
 489 static struct hist_entry *hists__findnew_entry(struct hists *hists,
 490                                                struct hist_entry *entry,
 491                                                struct addr_location *al,
 492                                                bool sample_self)
 493 {
 494         struct rb_node **p;
 495         struct rb_node *parent = NULL;
 496         struct hist_entry *he;
 497         int64_t cmp;
 498         u64 period = entry->stat.period;
 499         u64 weight = entry->stat.weight;
 500
 501         p = &hists->entries_in->rb_node;
 502
 503         while (*p != NULL) {
 504                 parent = *p;
 505                 he = rb_entry(parent, struct hist_entry, rb_node_in);
 506
 507                 /*
 508                  * Make sure that it receives arguments in a same order as
 509                  * hist_entry__collapse() so that we can use an appropriate
 510                  * function when searching an entry regardless which sort
 511                  * keys were used.
 512                  */
 513                 cmp = hist_entry__cmp(he, entry);
 514
 515                 if (!cmp) {
 516                         if (sample_self) {
 517                                 he_stat__add_period(&he->stat, period, weight);
 518                                 hist_entry__add_callchain_period(he, period);
 519                         }
 520                         if (symbol_conf.cumulate_callchain)
 521                                 he_stat__add_period(he->stat_acc, period, weight);
 522
 523                         /*
 524                          * This mem info was allocated from sample__resolve_mem
 525                          * and will not be used anymore.
 526                          */
 527                         zfree(&entry->mem_info);
 528
 529                         /* If the map of an existing hist_entry has
 530                          * become out-of-date due to an exec() or
 531                          * similar, update it.  Otherwise we will
 532                          * mis-adjust symbol addresses when computing
 533                          * the history counter to increment.
 534                          */
 535                         if (he->ms.map != entry->ms.map) {
 536                                 map__put(he->ms.map);
 537                                 he->ms.map = map__get(entry->ms.map);
 538                         }
 539                         goto out;
 540                 }
 541
 542                 if (cmp < 0)
 543                         p = &(*p)->rb_left;
 544                 else
 545                         p = &(*p)->rb_right;
 546         }
 547
 548         he = hist_entry__new(entry, sample_self);
 549         if (!he)
 550                 return NULL;
 551
 552         if (sample_self)
 553                 hist_entry__add_callchain_period(he, period);
 554         hists->nr_entries++;
 555
 556         rb_link_node(&he->rb_node_in, parent, p);
 557         rb_insert_color(&he->rb_node_in, hists->entries_in);
 558 out:
 559         if (sample_self)
 560                 he_stat__add_cpumode_period(&he->stat, al->cpumode, period);
 561         if (symbol_conf.cumulate_callchain)
 562                 he_stat__add_cpumode_period(he->stat_acc, al->cpumode, period);
 563         return he;
 564 }
 565
 566 static struct hist_entry*
 567 __hists__add_entry(struct hists *hists,
 568                    struct addr_location *al,
 569                    struct symbol *sym_parent,
 570                    struct branch_info *bi,
 571                    struct mem_info *mi,
 572                    struct perf_sample *sample,
 573                    bool sample_self,
 574                    struct hist_entry_ops *ops)
 575 {
 576         struct hist_entry entry = {
 577                 .thread = al->thread,
 578                 .comm = thread__comm(al->thread),
 579                 .ms = {
 580                         .map    = al->map,
 581                         .sym    = al->sym,
 582                 },
 583                 .socket  = al->socket,
 584                 .cpu     = al->cpu,
 585                 .cpumode = al->cpumode,
 586                 .ip      = al->addr,
 587                 .level   = al->level,
 588                 .stat = {
 589                         .nr_events = 1,
 590                         .period = sample->period,
 591                         .weight = sample->weight,
 592                 },
 593                 .parent = sym_parent,
 594                 .filtered = symbol__parent_filter(sym_parent) | al->filtered,
 595                 .hists  = hists,
 596                 .branch_info = bi,
 597                 .mem_info = mi,
 598                 .transaction = sample->transaction,
 599                 .raw_data = sample->raw_data,
 600                 .raw_size = sample->raw_size,
 601                 .ops = ops,
 602         };
 603
 604         return hists__findnew_entry(hists, &entry, al, sample_self);
 605 }
 606
 607 struct hist_entry *hists__add_entry(struct hists *hists,
 608                                     struct addr_location *al,
 609                                     struct symbol *sym_parent,
 610                                     struct branch_info *bi,
 611                                     struct mem_info *mi,
 612                                     struct perf_sample *sample,
 613                                     bool sample_self)
 614 {
 615         return __hists__add_entry(hists, al, sym_parent, bi, mi,
 616                                   sample, sample_self, NULL);
 617 }
 618
 619 struct hist_entry *hists__add_entry_ops(struct hists *hists,
 620                                         struct hist_entry_ops *ops,
 621                                         struct addr_location *al,
 622                                         struct symbol *sym_parent,
 623                                         struct branch_info *bi,
 624                                         struct mem_info *mi,
 625                                         struct perf_sample *sample,
 626                                         bool sample_self)
 627 {
 628         return __hists__add_entry(hists, al, sym_parent, bi, mi,
 629                                   sample, sample_self, ops);
 630 }
 631
 632 static int
 633 iter_next_nop_entry(struct hist_entry_iter *iter __maybe_unused,
 634                     struct addr_location *al __maybe_unused)
 635 {
 636         return 0;
 637 }
 638
 639 static int
 640 iter_add_next_nop_entry(struct hist_entry_iter *iter __maybe_unused,
 641                         struct addr_location *al __maybe_unused)
 642 {
 643         return 0;
 644 }
 645
 646 static int
 647 iter_prepare_mem_entry(struct hist_entry_iter *iter, struct addr_location *al)
 648 {
 649         struct perf_sample *sample = iter->sample;
 650         struct mem_info *mi;
 651
 652         mi = sample__resolve_mem(sample, al);
 653         if (mi == NULL)
 654                 return -ENOMEM;
 655
 656         iter->priv = mi;
 657         return 0;
 658 }
 659
 660 static int
 661 iter_add_single_mem_entry(struct hist_entry_iter *iter, struct addr_location *al)
 662 {
 663         u64 cost;
 664         struct mem_info *mi = iter->priv;
 665         struct hists *hists = evsel__hists(iter->evsel);
 666         struct perf_sample *sample = iter->sample;
 667         struct hist_entry *he;
 668
 669         if (mi == NULL)
 670                 return -EINVAL;
 671
 672         cost = sample->weight;
 673         if (!cost)
 674                 cost = 1;
 675
 676         /*
 677          * must pass period=weight in order to get the correct
 678          * sorting from hists__collapse_resort() which is solely
 679          * based on periods. We want sorting be done on nr_events * weight
 680          * and this is indirectly achieved by passing period=weight here
 681          * and the he_stat__add_period() function.
 682          */
 683         sample->period = cost;
 684
 685         he = hists__add_entry(hists, al, iter->parent, NULL, mi,
 686                               sample, true);
 687         if (!he)
 688                 return -ENOMEM;
 689
 690         iter->he = he;
 691         return 0;
 692 }
 693
 694 static int
 695 iter_finish_mem_entry(struct hist_entry_iter *iter,
 696                       struct addr_location *al __maybe_unused)
 697 {
 698         struct perf_evsel *evsel = iter->evsel;
 699         struct hists *hists = evsel__hists(evsel);
 700         struct hist_entry *he = iter->he;
 701         int err = -EINVAL;
 702
 703         if (he == NULL)
 704                 goto out;
 705
 706         hists__inc_nr_samples(hists, he->filtered);
 707
 708         err = hist_entry__append_callchain(he, iter->sample);
 709
 710 out:
 711         /*
 712          * We don't need to free iter->priv (mem_info) here since the mem info
 713          * was either already freed in hists__findnew_entry() or passed to a
 714          * new hist entry by hist_entry__new().
 715          */
 716         iter->priv = NULL;
 717
 718         iter->he = NULL;
 719         return err;
 720 }
 721
 722 static int
 723 iter_prepare_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)
 724 {
 725         struct branch_info *bi;
 726         struct perf_sample *sample = iter->sample;
 727
 728         bi = sample__resolve_bstack(sample, al);
 729         if (!bi)
 730                 return -ENOMEM;
 731
 732         iter->curr = 0;
 733         iter->total = sample->branch_stack->nr;
 734
 735         iter->priv = bi;
 736         return 0;
 737 }
 738
 739 static int
 740 iter_add_single_branch_entry(struct hist_entry_iter *iter,
 741                              struct addr_location *al __maybe_unused)
 742 {
 743         /* to avoid calling callback function */
 744         iter->he = NULL;
 745
 746         return 0;
 747 }
 748
 749 static int
 750 iter_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)
 751 {
 752         struct branch_info *bi = iter->priv;
 753         int i = iter->curr;
 754
 755         if (bi == NULL)
 756                 return 0;
 757
 758         if (iter->curr >= iter->total)
 759                 return 0;
 760
 761         al->map = bi[i].to.map;
 762         al->sym = bi[i].to.sym;
 763         al->addr = bi[i].to.addr;
 764         return 1;
 765 }
 766
 767 static int
 768 iter_add_next_branch_entry(struct hist_entry_iter *iter, struct addr_location *al)
 769 {
 770         struct branch_info *bi;
 771         struct perf_evsel *evsel = iter->evsel;
 772         struct hists *hists = evsel__hists(evsel);
 773         struct perf_sample *sample = iter->sample;
 774         struct hist_entry *he = NULL;
 775         int i = iter->curr;
 776         int err = 0;
 777
 778         bi = iter->priv;
 779
 780         if (iter->hide_unresolved && !(bi[i].from.sym && bi[i].to.sym))
 781                 goto out;
 782
 783         /*
 784          * The report shows the percentage of total branches captured
 785          * and not events sampled. Thus we use a pseudo period of 1.
 786          */
 787         sample->period = 1;
 788         sample->weight = bi->flags.cycles ? bi->flags.cycles : 1;
 789
 790         he = hists__add_entry(hists, al, iter->parent, &bi[i], NULL,
 791                               sample, true);
 792         if (he == NULL)
 793                 return -ENOMEM;
 794
 795         hists__inc_nr_samples(hists, he->filtered);
 796
 797 out:
 798         iter->he = he;
 799         iter->curr++;
 800         return err;
 801 }
 802
 803 static int
 804 iter_finish_branch_entry(struct hist_entry_iter *iter,
 805                          struct addr_location *al __maybe_unused)
 806 {
 807         zfree(&iter->priv);
 808         iter->he = NULL;
 809
 810         return iter->curr >= iter->total ? 0 : -1;
 811 }
 812
 813 static int
 814 iter_prepare_normal_entry(struct hist_entry_iter *iter __maybe_unused,
 815                           struct addr_location *al __maybe_unused)
 816 {
 817         return 0;
 818 }
 819
 820 static int
 821 iter_add_single_normal_entry(struct hist_entry_iter *iter, struct addr_location *al)
 822 {
 823         struct perf_evsel *evsel = iter->evsel;
 824         struct perf_sample *sample = iter->sample;
 825         struct hist_entry *he;
 826
 827         he = hists__add_entry(evsel__hists(evsel), al, iter->parent, NULL, NULL,
 828                               sample, true);
 829         if (he == NULL)
 830                 return -ENOMEM;
 831
 832         iter->he = he;
 833         return 0;
 834 }
 835
 836 static int
 837 iter_finish_normal_entry(struct hist_entry_iter *iter,
 838                          struct addr_location *al __maybe_unused)
 839 {
 840         struct hist_entry *he = iter->he;
 841         struct perf_evsel *evsel = iter->evsel;
 842         struct perf_sample *sample = iter->sample;
 843
 844         if (he == NULL)
 845                 return 0;
 846
 847         iter->he = NULL;
 848
 849         hists__inc_nr_samples(evsel__hists(evsel), he->filtered);
 850
 851         return hist_entry__append_callchain(he, sample);
 852 }
 853
 854 static int
 855 iter_prepare_cumulative_entry(struct hist_entry_iter *iter,
 856                               struct addr_location *al __maybe_unused)
 857 {
 858         struct hist_entry **he_cache;
 859
 860         callchain_cursor_commit(&callchain_cursor);
 861
 862         /*
 863          * This is for detecting cycles or recursions so that they're
 864          * cumulated only one time to prevent entries more than 100%
 865          * overhead.
 866          */
 867         he_cache = malloc(sizeof(*he_cache) * (iter->max_stack + 1));
 868         if (he_cache == NULL)
 869                 return -ENOMEM;
 870
 871         iter->priv = he_cache;
 872         iter->curr = 0;
 873
 874         return 0;
 875 }
 876
 877 static int
 878 iter_add_single_cumulative_entry(struct hist_entry_iter *iter,
 879                                  struct addr_location *al)
 880 {
 881         struct perf_evsel *evsel = iter->evsel;
 882         struct hists *hists = evsel__hists(evsel);
 883         struct perf_sample *sample = iter->sample;
 884         struct hist_entry **he_cache = iter->priv;
 885         struct hist_entry *he;
 886         int err = 0;
 887
 888         he = hists__add_entry(hists, al, iter->parent, NULL, NULL,
 889                               sample, true);
 890         if (he == NULL)
 891                 return -ENOMEM;
 892
 893         iter->he = he;
 894         he_cache[iter->curr++] = he;
 895
 896         hist_entry__append_callchain(he, sample);
 897
 898         /*
 899          * We need to re-initialize the cursor since callchain_append()
 900          * advanced the cursor to the end.
 901          */
 902         callchain_cursor_commit(&callchain_cursor);
 903
 904         hists__inc_nr_samples(hists, he->filtered);
 905
 906         return err;
 907 }
 908
 909 static int
 910 iter_next_cumulative_entry(struct hist_entry_iter *iter,
 911                            struct addr_location *al)
 912 {
 913         struct callchain_cursor_node *node;
 914
 915         node = callchain_cursor_current(&callchain_cursor);
 916         if (node == NULL)
 917                 return 0;
 918
 919         return fill_callchain_info(al, node, iter->hide_unresolved);
 920 }
 921
 922 static int
 923 iter_add_next_cumulative_entry(struct hist_entry_iter *iter,
 924                                struct addr_location *al)
 925 {
 926         struct perf_evsel *evsel = iter->evsel;
 927         struct perf_sample *sample = iter->sample;
 928         struct hist_entry **he_cache = iter->priv;
 929         struct hist_entry *he;
 930         struct hist_entry he_tmp = {
 931                 .hists = evsel__hists(evsel),
 932                 .cpu = al->cpu,
 933                 .thread = al->thread,
 934                 .comm = thread__comm(al->thread),
 935                 .ip = al->addr,
 936                 .ms = {
 937                         .map = al->map,
 938                         .sym = al->sym,
 939                 },
 940                 .parent = iter->parent,
 941                 .raw_data = sample->raw_data,
 942                 .raw_size = sample->raw_size,
 943         };
 944         int i;
 945         struct callchain_cursor cursor;
 946
 947         callchain_cursor_snapshot(&cursor, &callchain_cursor);
 948
 949         callchain_cursor_advance(&callchain_cursor);
 950
 951         /*
 952          * Check if there's duplicate entries in the callchain.
 953          * It's possible that it has cycles or recursive calls.
 954          */
 955         for (i = 0; i < iter->curr; i++) {
 956                 if (hist_entry__cmp(he_cache[i], &he_tmp) == 0) {
 957                         /* to avoid calling callback function */
 958                         iter->he = NULL;
 959                         return 0;
 960                 }
 961         }
 962
 963         he = hists__add_entry(evsel__hists(evsel), al, iter->parent, NULL, NULL,
 964                               sample, false);
 965         if (he == NULL)
 966                 return -ENOMEM;
 967
 968         iter->he = he;
 969         he_cache[iter->curr++] = he;
 970
 971         if (symbol_conf.use_callchain)
 972                 callchain_append(he->callchain, &cursor, sample->period);
 973         return 0;
 974 }
 975
 976 static int
 977 iter_finish_cumulative_entry(struct hist_entry_iter *iter,
 978                              struct addr_location *al __maybe_unused)
 979 {
 980         zfree(&iter->priv);
 981         iter->he = NULL;
 982
 983         return 0;
 984 }
 985
 986 const struct hist_iter_ops hist_iter_mem = {
 987         .prepare_entry          = iter_prepare_mem_entry,
 988         .add_single_entry       = iter_add_single_mem_entry,
 989         .next_entry             = iter_next_nop_entry,
 990         .add_next_entry         = iter_add_next_nop_entry,
 991         .finish_entry           = iter_finish_mem_entry,
 992 };
 993
 994 const struct hist_iter_ops hist_iter_branch = {
 995         .prepare_entry          = iter_prepare_branch_entry,
 996         .add_single_entry       = iter_add_single_branch_entry,
 997         .next_entry             = iter_next_branch_entry,
 998         .add_next_entry         = iter_add_next_branch_entry,
 999         .finish_entry           = iter_finish_branch_entry,
1000 };
1001
1002 const struct hist_iter_ops hist_iter_normal = {
1003         .prepare_entry          = iter_prepare_normal_entry,
1004         .add_single_entry       = iter_add_single_normal_entry,
1005         .next_entry             = iter_next_nop_entry,
1006         .add_next_entry         = iter_add_next_nop_entry,
1007         .finish_entry           = iter_finish_normal_entry,
1008 };
1009
1010 const struct hist_iter_ops hist_iter_cumulative = {
1011         .prepare_entry          = iter_prepare_cumulative_entry,
1012         .add_single_entry       = iter_add_single_cumulative_entry,
1013         .next_entry             = iter_next_cumulative_entry,
1014         .add_next_entry         = iter_add_next_cumulative_entry,
1015         .finish_entry           = iter_finish_cumulative_entry,
1016 };
1017
1018 int hist_entry_iter__add(struct hist_entry_iter *iter, struct addr_location *al,
1019                          int max_stack_depth, void *arg)
1020 {
1021         int err, err2;
1022
1023         err = sample__resolve_callchain(iter->sample, &callchain_cursor, &iter->parent,
1024                                         iter->evsel, al, max_stack_depth);
1025         if (err)
1026                 return err;
1027
1028         iter->max_stack = max_stack_depth;
1029
1030         err = iter->ops->prepare_entry(iter, al);
1031         if (err)
1032                 goto out;
1033
1034         err = iter->ops->add_single_entry(iter, al);
1035         if (err)
1036                 goto out;
1037
1038         if (iter->he && iter->add_entry_cb) {
1039                 err = iter->add_entry_cb(iter, al, true, arg);
1040                 if (err)
1041                         goto out;
1042         }
1043
1044         while (iter->ops->next_entry(iter, al)) {
1045                 err = iter->ops->add_next_entry(iter, al);
1046                 if (err)
1047                         break;
1048
1049                 if (iter->he && iter->add_entry_cb) {
1050                         err = iter->add_entry_cb(iter, al, false, arg);
1051                         if (err)
1052                                 goto out;
1053                 }
1054         }
1055
1056 out:
1057         err2 = iter->ops->finish_entry(iter, al);
1058         if (!err)
1059                 err = err2;
1060
1061         return err;
1062 }
1063
1064 int64_t
1065 hist_entry__cmp(struct hist_entry *left, struct hist_entry *right)
1066 {
1067         struct hists *hists = left->hists;
1068         struct perf_hpp_fmt *fmt;
1069         int64_t cmp = 0;
1070
1071         hists__for_each_sort_list(hists, fmt) {
1072                 if (perf_hpp__is_dynamic_entry(fmt) &&
1073                     !perf_hpp__defined_dynamic_entry(fmt, hists))
1074                         continue;
1075
1076                 cmp = fmt->cmp(fmt, left, right);
1077                 if (cmp)
1078                         break;
1079         }
1080
1081         return cmp;
1082 }
1083
1084 int64_t
1085 hist_entry__collapse(struct hist_entry *left, struct hist_entry *right)
1086 {
1087         struct hists *hists = left->hists;
1088         struct perf_hpp_fmt *fmt;
1089         int64_t cmp = 0;
1090
1091         hists__for_each_sort_list(hists, fmt) {
1092                 if (perf_hpp__is_dynamic_entry(fmt) &&
1093                     !perf_hpp__defined_dynamic_entry(fmt, hists))
1094                         continue;
1095
1096                 cmp = fmt->collapse(fmt, left, right);
1097                 if (cmp)
1098                         break;
1099         }
1100
1101         return cmp;
1102 }
1103
1104 void hist_entry__delete(struct hist_entry *he)
1105 {
1106         struct hist_entry_ops *ops = he->ops;
1107
1108         thread__zput(he->thread);
1109         map__zput(he->ms.map);
1110
1111         if (he->branch_info) {
1112                 map__zput(he->branch_info->from.map);
1113                 map__zput(he->branch_info->to.map);
1114                 free_srcline(he->branch_info->srcline_from);
1115                 free_srcline(he->branch_info->srcline_to);
1116                 zfree(&he->branch_info);
1117         }
1118
1119         if (he->mem_info) {
1120                 map__zput(he->mem_info->iaddr.map);
1121                 map__zput(he->mem_info->daddr.map);
1122                 zfree(&he->mem_info);
1123         }
1124
1125         zfree(&he->stat_acc);
1126         free_srcline(he->srcline);
1127         if (he->srcfile && he->srcfile[0])
1128                 free(he->srcfile);
1129         free_callchain(he->callchain);
1130         free(he->trace_output);
1131         free(he->raw_data);
1132         ops->free(he);
1133 }
1134
1135 /*
1136  * If this is not the last column, then we need to pad it according to the
1137  * pre-calculated max lenght for this column, otherwise don't bother adding
1138  * spaces because that would break viewing this with, for instance, 'less',
1139  * that would show tons of trailing spaces when a long C++ demangled method
1140  * names is sampled.
1141 */
1142 int hist_entry__snprintf_alignment(struct hist_entry *he, struct perf_hpp *hpp,
1143                                    struct perf_hpp_fmt *fmt, int printed)
1144 {
1145         if (!list_is_last(&fmt->list, &he->hists->hpp_list->fields)) {
1146                 const int width = fmt->width(fmt, hpp, he->hists);
1147                 if (printed < width) {
1148                         advance_hpp(hpp, printed);
1149                         printed = scnprintf(hpp->buf, hpp->size, "%-*s", width - printed, " ");
1150                 }
1151         }
1152
1153         return printed;
1154 }
1155
1156 /*
1157  * collapse the histogram
1158  */
1159
1160 static void hists__apply_filters(struct hists *hists, struct hist_entry *he);
1161 static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *he,
1162                                        enum hist_filter type);
1163
1164 typedef bool (*fmt_chk_fn)(struct perf_hpp_fmt *fmt);
1165
1166 static bool check_thread_entry(struct perf_hpp_fmt *fmt)
1167 {
1168         return perf_hpp__is_thread_entry(fmt) || perf_hpp__is_comm_entry(fmt);
1169 }
1170
1171 static void hist_entry__check_and_remove_filter(struct hist_entry *he,
1172                                                 enum hist_filter type,
1173                                                 fmt_chk_fn check)
1174 {
1175         struct perf_hpp_fmt *fmt;
1176         bool type_match = false;
1177         struct hist_entry *parent = he->parent_he;
1178
1179         switch (type) {
1180         case HIST_FILTER__THREAD:
1181                 if (symbol_conf.comm_list == NULL &&
1182                     symbol_conf.pid_list == NULL &&
1183                     symbol_conf.tid_list == NULL)
1184                         return;
1185                 break;
1186         case HIST_FILTER__DSO:
1187                 if (symbol_conf.dso_list == NULL)
1188                         return;
1189                 break;
1190         case HIST_FILTER__SYMBOL:
1191                 if (symbol_conf.sym_list == NULL)
1192                         return;
1193                 break;
1194         case HIST_FILTER__PARENT:
1195         case HIST_FILTER__GUEST:
1196         case HIST_FILTER__HOST:
1197         case HIST_FILTER__SOCKET:
1198         case HIST_FILTER__C2C:
1199         default:
1200                 return;
1201         }
1202
1203         /* if it's filtered by own fmt, it has to have filter bits */
1204         perf_hpp_list__for_each_format(he->hpp_list, fmt) {
1205                 if (check(fmt)) {
1206                         type_match = true;
1207                         break;
1208                 }
1209         }
1210
1211         if (type_match) {
1212                 /*
1213                  * If the filter is for current level entry, propagate
1214                  * filter marker to parents.  The marker bit was
1215                  * already set by default so it only needs to clear
1216                  * non-filtered entries.
1217                  */
1218                 if (!(he->filtered & (1 << type))) {
1219                         while (parent) {
1220                                 parent->filtered &= ~(1 << type);
1221                                 parent = parent->parent_he;
1222                         }
1223                 }
1224         } else {
1225                 /*
1226                  * If current entry doesn't have matching formats, set
1227                  * filter marker for upper level entries.  it will be
1228                  * cleared if its lower level entries is not filtered.
1229                  *
1230                  * For lower-level entries, it inherits parent's
1231                  * filter bit so that lower level entries of a
1232                  * non-filtered entry won't set the filter marker.
1233                  */
1234                 if (parent == NULL)
1235                         he->filtered |= (1 << type);
1236                 else
1237                         he->filtered |= (parent->filtered & (1 << type));
1238         }
1239 }
1240
1241 static void hist_entry__apply_hierarchy_filters(struct hist_entry *he)
1242 {
1243         hist_entry__check_and_remove_filter(he, HIST_FILTER__THREAD,
1244                                             check_thread_entry);
1245
1246         hist_entry__check_and_remove_filter(he, HIST_FILTER__DSO,
1247                                             perf_hpp__is_dso_entry);
1248
1249         hist_entry__check_and_remove_filter(he, HIST_FILTER__SYMBOL,
1250                                             perf_hpp__is_sym_entry);
1251
1252         hists__apply_filters(he->hists, he);
1253 }
1254
1255 static struct hist_entry *hierarchy_insert_entry(struct hists *hists,
1256                                                  struct rb_root *root,
1257                                                  struct hist_entry *he,
1258                                                  struct hist_entry *parent_he,
1259                                                  struct perf_hpp_list *hpp_list)
1260 {
1261         struct rb_node **p = &root->rb_node;
1262         struct rb_node *parent = NULL;
1263         struct hist_entry *iter, *new;
1264         struct perf_hpp_fmt *fmt;
1265         int64_t cmp;
1266
1267         while (*p != NULL) {
1268                 parent = *p;
1269                 iter = rb_entry(parent, struct hist_entry, rb_node_in);
1270
1271                 cmp = 0;
1272                 perf_hpp_list__for_each_sort_list(hpp_list, fmt) {
1273                         cmp = fmt->collapse(fmt, iter, he);
1274                         if (cmp)
1275                                 break;
1276                 }
1277
1278                 if (!cmp) {
1279                         he_stat__add_stat(&iter->stat, &he->stat);
1280                         return iter;
1281                 }
1282
1283                 if (cmp < 0)
1284                         p = &parent->rb_left;
1285                 else
1286                         p = &parent->rb_right;
1287         }
1288
1289         new = hist_entry__new(he, true);
1290         if (new == NULL)
1291                 return NULL;
1292
1293         hists->nr_entries++;
1294
1295         /* save related format list for output */
1296         new->hpp_list = hpp_list;
1297         new->parent_he = parent_he;
1298
1299         hist_entry__apply_hierarchy_filters(new);
1300
1301         /* some fields are now passed to 'new' */
1302         perf_hpp_list__for_each_sort_list(hpp_list, fmt) {
1303                 if (perf_hpp__is_trace_entry(fmt) || perf_hpp__is_dynamic_entry(fmt))
1304                         he->trace_output = NULL;
1305                 else
1306                         new->trace_output = NULL;
1307
1308                 if (perf_hpp__is_srcline_entry(fmt))
1309                         he->srcline = NULL;
1310                 else
1311                         new->srcline = NULL;
1312
1313                 if (perf_hpp__is_srcfile_entry(fmt))
1314                         he->srcfile = NULL;
1315                 else
1316                         new->srcfile = NULL;
1317         }
1318
1319         rb_link_node(&new->rb_node_in, parent, p);
1320         rb_insert_color(&new->rb_node_in, root);
1321         return new;
1322 }
1323
1324 static int hists__hierarchy_insert_entry(struct hists *hists,
1325                                          struct rb_root *root,
1326                                          struct hist_entry *he)
1327 {
1328         struct perf_hpp_list_node *node;
1329         struct hist_entry *new_he = NULL;
1330         struct hist_entry *parent = NULL;
1331         int depth = 0;
1332         int ret = 0;
1333
1334         list_for_each_entry(node, &hists->hpp_formats, list) {
1335                 /* skip period (overhead) and elided columns */
1336                 if (node->level == 0 || node->skip)
1337                         continue;
1338
1339                 /* insert copy of 'he' for each fmt into the hierarchy */
1340                 new_he = hierarchy_insert_entry(hists, root, he, parent, &node->hpp);
1341                 if (new_he == NULL) {
1342                         ret = -1;
1343                         break;
1344                 }
1345
1346                 root = &new_he->hroot_in;
1347                 new_he->depth = depth++;
1348                 parent = new_he;
1349         }
1350
1351         if (new_he) {
1352                 new_he->leaf = true;
1353
1354                 if (symbol_conf.use_callchain) {
1355                         callchain_cursor_reset(&callchain_cursor);
1356                         if (callchain_merge(&callchain_cursor,
1357                                             new_he->callchain,
1358                                             he->callchain) < 0)
1359                                 ret = -1;
1360                 }
1361         }
1362
1363         /* 'he' is no longer used */
1364         hist_entry__delete(he);
1365
1366         /* return 0 (or -1) since it already applied filters */
1367         return ret;
1368 }
1369
1370 static int hists__collapse_insert_entry(struct hists *hists,
1371                                         struct rb_root *root,
1372                                         struct hist_entry *he)
1373 {
1374         struct rb_node **p = &root->rb_node;
1375         struct rb_node *parent = NULL;
1376         struct hist_entry *iter;
1377         int64_t cmp;
1378
1379         if (symbol_conf.report_hierarchy)
1380                 return hists__hierarchy_insert_entry(hists, root, he);
1381
1382         while (*p != NULL) {
1383                 parent = *p;
1384                 iter = rb_entry(parent, struct hist_entry, rb_node_in);
1385
1386                 cmp = hist_entry__collapse(iter, he);
1387
1388                 if (!cmp) {
1389                         int ret = 0;
1390
1391                         he_stat__add_stat(&iter->stat, &he->stat);
1392                         if (symbol_conf.cumulate_callchain)
1393                                 he_stat__add_stat(iter->stat_acc, he->stat_acc);
1394
1395                         if (symbol_conf.use_callchain) {
1396                                 callchain_cursor_reset(&callchain_cursor);
1397                                 if (callchain_merge(&callchain_cursor,
1398                                                     iter->callchain,
1399                                                     he->callchain) < 0)
1400                                         ret = -1;
1401                         }
1402                         hist_entry__delete(he);
1403                         return ret;
1404                 }
1405
1406                 if (cmp < 0)
1407                         p = &(*p)->rb_left;
1408                 else
1409                         p = &(*p)->rb_right;
1410         }
1411         hists->nr_entries++;
1412
1413         rb_link_node(&he->rb_node_in, parent, p);
1414         rb_insert_color(&he->rb_node_in, root);
1415         return 1;
1416 }
1417
1418 struct rb_root *hists__get_rotate_entries_in(struct hists *hists)
1419 {
1420         struct rb_root *root;
1421
1422         pthread_mutex_lock(&hists->lock);
1423
1424         root = hists->entries_in;
1425         if (++hists->entries_in > &hists->entries_in_array[1])
1426                 hists->entries_in = &hists->entries_in_array[0];
1427
1428         pthread_mutex_unlock(&hists->lock);
1429
1430         return root;
1431 }
1432
1433 static void hists__apply_filters(struct hists *hists, struct hist_entry *he)
1434 {
1435         hists__filter_entry_by_dso(hists, he);
1436         hists__filter_entry_by_thread(hists, he);
1437         hists__filter_entry_by_symbol(hists, he);
1438         hists__filter_entry_by_socket(hists, he);
1439 }
1440
1441 int hists__collapse_resort(struct hists *hists, struct ui_progress *prog)
1442 {
1443         struct rb_root *root;
1444         struct rb_node *next;
1445         struct hist_entry *n;
1446         int ret;
1447
1448         if (!hists__has(hists, need_collapse))
1449                 return 0;
1450
1451         hists->nr_entries = 0;
1452
1453         root = hists__get_rotate_entries_in(hists);
1454
1455         next = rb_first(root);
1456
1457         while (next) {
1458                 if (session_done())
1459                         break;
1460                 n = rb_entry(next, struct hist_entry, rb_node_in);
1461                 next = rb_next(&n->rb_node_in);
1462
1463                 rb_erase(&n->rb_node_in, root);
1464                 ret = hists__collapse_insert_entry(hists, &hists->entries_collapsed, n);
1465                 if (ret < 0)
1466                         return -1;
1467
1468                 if (ret) {
1469                         /*
1470                          * If it wasn't combined with one of the entries already
1471                          * collapsed, we need to apply the filters that may have
1472                          * been set by, say, the hist_browser.
1473                          */
1474                         hists__apply_filters(hists, n);
1475                 }
1476                 if (prog)
1477                         ui_progress__update(prog, 1);
1478         }
1479         return 0;
1480 }
1481
1482 static int hist_entry__sort(struct hist_entry *a, struct hist_entry *b)
1483 {
1484         struct hists *hists = a->hists;
1485         struct perf_hpp_fmt *fmt;
1486         int64_t cmp = 0;
1487
1488         hists__for_each_sort_list(hists, fmt) {
1489                 if (perf_hpp__should_skip(fmt, a->hists))
1490                         continue;
1491
1492                 cmp = fmt->sort(fmt, a, b);
1493                 if (cmp)
1494                         break;
1495         }
1496
1497         return cmp;
1498 }
1499
1500 static void hists__reset_filter_stats(struct hists *hists)
1501 {
1502         hists->nr_non_filtered_entries = 0;
1503         hists->stats.total_non_filtered_period = 0;
1504 }
1505
1506 void hists__reset_stats(struct hists *hists)
1507 {
1508         hists->nr_entries = 0;
1509         hists->stats.total_period = 0;
1510
1511         hists__reset_filter_stats(hists);
1512 }
1513
1514 static void hists__inc_filter_stats(struct hists *hists, struct hist_entry *h)
1515 {
1516         hists->nr_non_filtered_entries++;
1517         hists->stats.total_non_filtered_period += h->stat.period;
1518 }
1519
1520 void hists__inc_stats(struct hists *hists, struct hist_entry *h)
1521 {
1522         if (!h->filtered)
1523                 hists__inc_filter_stats(hists, h);
1524
1525         hists->nr_entries++;
1526         hists->stats.total_period += h->stat.period;
1527 }
1528
1529 static void hierarchy_recalc_total_periods(struct hists *hists)
1530 {
1531         struct rb_node *node;
1532         struct hist_entry *he;
1533
1534         node = rb_first(&hists->entries);
1535
1536         hists->stats.total_period = 0;
1537         hists->stats.total_non_filtered_period = 0;
1538
1539         /*
1540          * recalculate total period using top-level entries only
1541          * since lower level entries only see non-filtered entries
1542          * but upper level entries have sum of both entries.
1543          */
1544         while (node) {
1545                 he = rb_entry(node, struct hist_entry, rb_node);
1546                 node = rb_next(node);
1547
1548                 hists->stats.total_period += he->stat.period;
1549                 if (!he->filtered)
1550                         hists->stats.total_non_filtered_period += he->stat.period;
1551         }
1552 }
1553
1554 static void hierarchy_insert_output_entry(struct rb_root *root,
1555                                           struct hist_entry *he)
1556 {
1557         struct rb_node **p = &root->rb_node;
1558         struct rb_node *parent = NULL;
1559         struct hist_entry *iter;
1560         struct perf_hpp_fmt *fmt;
1561
1562         while (*p != NULL) {
1563                 parent = *p;
1564                 iter = rb_entry(parent, struct hist_entry, rb_node);
1565
1566                 if (hist_entry__sort(he, iter) > 0)
1567                         p = &parent->rb_left;
1568                 else
1569                         p = &parent->rb_right;
1570         }
1571
1572         rb_link_node(&he->rb_node, parent, p);
1573         rb_insert_color(&he->rb_node, root);
1574
1575         /* update column width of dynamic entry */
1576         perf_hpp_list__for_each_sort_list(he->hpp_list, fmt) {
1577                 if (perf_hpp__is_dynamic_entry(fmt))
1578                         fmt->sort(fmt, he, NULL);
1579         }
1580 }
1581
1582 static void hists__hierarchy_output_resort(struct hists *hists,
1583                                            struct ui_progress *prog,
1584                                            struct rb_root *root_in,
1585                                            struct rb_root *root_out,
1586                                            u64 min_callchain_hits,
1587                                            bool use_callchain)
1588 {
1589         struct rb_node *node;
1590         struct hist_entry *he;
1591
1592         *root_out = RB_ROOT;
1593         node = rb_first(root_in);
1594
1595         while (node) {
1596                 he = rb_entry(node, struct hist_entry, rb_node_in);
1597                 node = rb_next(node);
1598
1599                 hierarchy_insert_output_entry(root_out, he);
1600
1601                 if (prog)
1602                         ui_progress__update(prog, 1);
1603
1604                 hists->nr_entries++;
1605                 if (!he->filtered) {
1606                         hists->nr_non_filtered_entries++;
1607                         hists__calc_col_len(hists, he);
1608                 }
1609
1610                 if (!he->leaf) {
1611                         hists__hierarchy_output_resort(hists, prog,
1612                                                        &he->hroot_in,
1613                                                        &he->hroot_out,
1614                                                        min_callchain_hits,
1615                                                        use_callchain);
1616                         continue;
1617                 }
1618
1619                 if (!use_callchain)
1620                         continue;
1621
1622                 if (callchain_param.mode == CHAIN_GRAPH_REL) {
1623                         u64 total = he->stat.period;
1624
1625                         if (symbol_conf.cumulate_callchain)
1626                                 total = he->stat_acc->period;
1627
1628                         min_callchain_hits = total * (callchain_param.min_percent / 100);
1629                 }
1630
1631                 callchain_param.sort(&he->sorted_chain, he->callchain,
1632                                      min_callchain_hits, &callchain_param);
1633         }
1634 }
1635
1636 static void __hists__insert_output_entry(struct rb_root *entries,
1637                                          struct hist_entry *he,
1638                                          u64 min_callchain_hits,
1639                                          bool use_callchain)
1640 {
1641         struct rb_node **p = &entries->rb_node;
1642         struct rb_node *parent = NULL;
1643         struct hist_entry *iter;
1644         struct perf_hpp_fmt *fmt;
1645
1646         if (use_callchain) {
1647                 if (callchain_param.mode == CHAIN_GRAPH_REL) {
1648                         u64 total = he->stat.period;
1649
1650                         if (symbol_conf.cumulate_callchain)
1651                                 total = he->stat_acc->period;
1652
1653                         min_callchain_hits = total * (callchain_param.min_percent / 100);
1654                 }
1655                 callchain_param.sort(&he->sorted_chain, he->callchain,
1656                                       min_callchain_hits, &callchain_param);
1657         }
1658
1659         while (*p != NULL) {
1660                 parent = *p;
1661                 iter = rb_entry(parent, struct hist_entry, rb_node);
1662
1663                 if (hist_entry__sort(he, iter) > 0)
1664                         p = &(*p)->rb_left;
1665                 else
1666                         p = &(*p)->rb_right;
1667         }
1668
1669         rb_link_node(&he->rb_node, parent, p);
1670         rb_insert_color(&he->rb_node, entries);
1671
1672         perf_hpp_list__for_each_sort_list(&perf_hpp_list, fmt) {
1673                 if (perf_hpp__is_dynamic_entry(fmt) &&
1674                     perf_hpp__defined_dynamic_entry(fmt, he->hists))
1675                         fmt->sort(fmt, he, NULL);  /* update column width */
1676         }
1677 }
1678
1679 static void output_resort(struct hists *hists, struct ui_progress *prog,
1680                           bool use_callchain, hists__resort_cb_t cb)
1681 {
1682         struct rb_root *root;
1683         struct rb_node *next;
1684         struct hist_entry *n;
1685         u64 callchain_total;
1686         u64 min_callchain_hits;
1687
1688         callchain_total = hists->callchain_period;
1689         if (symbol_conf.filter_relative)
1690                 callchain_total = hists->callchain_non_filtered_period;
1691
1692         min_callchain_hits = callchain_total * (callchain_param.min_percent / 100);
1693
1694         hists__reset_stats(hists);
1695         hists__reset_col_len(hists);
1696
1697         if (symbol_conf.report_hierarchy) {
1698                 hists__hierarchy_output_resort(hists, prog,
1699                                                &hists->entries_collapsed,
1700                                                &hists->entries,
1701                                                min_callchain_hits,
1702                                                use_callchain);
1703                 hierarchy_recalc_total_periods(hists);
1704                 return;
1705         }
1706
1707         if (hists__has(hists, need_collapse))
1708                 root = &hists->entries_collapsed;
1709         else
1710                 root = hists->entries_in;
1711
1712         next = rb_first(root);
1713         hists->entries = RB_ROOT;
1714
1715         while (next) {
1716                 n = rb_entry(next, struct hist_entry, rb_node_in);
1717                 next = rb_next(&n->rb_node_in);
1718
1719                 if (cb && cb(n))
1720                         continue;
1721
1722                 __hists__insert_output_entry(&hists->entries, n, min_callchain_hits, use_callchain);
1723                 hists__inc_stats(hists, n);
1724
1725                 if (!n->filtered)
1726                         hists__calc_col_len(hists, n);
1727
1728                 if (prog)
1729                         ui_progress__update(prog, 1);
1730         }
1731 }
1732
1733 void perf_evsel__output_resort(struct perf_evsel *evsel, struct ui_progress *prog)
1734 {
1735         bool use_callchain;
1736
1737         if (evsel && symbol_conf.use_callchain && !symbol_conf.show_ref_callgraph)
1738                 use_callchain = evsel->attr.sample_type & PERF_SAMPLE_CALLCHAIN;
1739         else
1740                 use_callchain = symbol_conf.use_callchain;
1741
1742         output_resort(evsel__hists(evsel), prog, use_callchain, NULL);
1743 }
1744
1745 void hists__output_resort(struct hists *hists, struct ui_progress *prog)
1746 {
1747         output_resort(hists, prog, symbol_conf.use_callchain, NULL);
1748 }
1749
1750 void hists__output_resort_cb(struct hists *hists, struct ui_progress *prog,
1751                              hists__resort_cb_t cb)
1752 {
1753         output_resort(hists, prog, symbol_conf.use_callchain, cb);
1754 }
1755
1756 static bool can_goto_child(struct hist_entry *he, enum hierarchy_move_dir hmd)
1757 {
1758         if (he->leaf || hmd == HMD_FORCE_SIBLING)
1759                 return false;
1760
1761         if (he->unfolded || hmd == HMD_FORCE_CHILD)
1762                 return true;
1763
1764         return false;
1765 }
1766
1767 struct rb_node *rb_hierarchy_last(struct rb_node *node)
1768 {
1769         struct hist_entry *he = rb_entry(node, struct hist_entry, rb_node);
1770
1771         while (can_goto_child(he, HMD_NORMAL)) {
1772                 node = rb_last(&he->hroot_out);
1773                 he = rb_entry(node, struct hist_entry, rb_node);
1774         }
1775         return node;
1776 }
1777
1778 struct rb_node *__rb_hierarchy_next(struct rb_node *node, enum hierarchy_move_dir hmd)
1779 {
1780         struct hist_entry *he = rb_entry(node, struct hist_entry, rb_node);
1781
1782         if (can_goto_child(he, hmd))
1783                 node = rb_first(&he->hroot_out);
1784         else
1785                 node = rb_next(node);
1786
1787         while (node == NULL) {
1788                 he = he->parent_he;
1789                 if (he == NULL)
1790                         break;
1791
1792                 node = rb_next(&he->rb_node);
1793         }
1794         return node;
1795 }
1796
1797 struct rb_node *rb_hierarchy_prev(struct rb_node *node)
1798 {
1799         struct hist_entry *he = rb_entry(node, struct hist_entry, rb_node);
1800
1801         node = rb_prev(node);
1802         if (node)
1803                 return rb_hierarchy_last(node);
1804
1805         he = he->parent_he;
1806         if (he == NULL)
1807                 return NULL;
1808
1809         return &he->rb_node;
1810 }
1811
1812 bool hist_entry__has_hierarchy_children(struct hist_entry *he, float limit)
1813 {
1814         struct rb_node *node;
1815         struct hist_entry *child;
1816         float percent;
1817
1818         if (he->leaf)
1819                 return false;
1820
1821         node = rb_first(&he->hroot_out);
1822         child = rb_entry(node, struct hist_entry, rb_node);
1823
1824         while (node && child->filtered) {
1825                 node = rb_next(node);
1826                 child = rb_entry(node, struct hist_entry, rb_node);
1827         }
1828
1829         if (node)
1830                 percent = hist_entry__get_percent_limit(child);
1831         else
1832                 percent = 0;
1833
1834         return node && percent >= limit;
1835 }
1836
1837 static void hists__remove_entry_filter(struct hists *hists, struct hist_entry *h,
1838                                        enum hist_filter filter)
1839 {
1840         h->filtered &= ~(1 << filter);
1841
1842         if (symbol_conf.report_hierarchy) {
1843                 struct hist_entry *parent = h->parent_he;
1844
1845                 while (parent) {
1846                         he_stat__add_stat(&parent->stat, &h->stat);
1847
1848                         parent->filtered &= ~(1 << filter);
1849
1850                         if (parent->filtered)
1851                                 goto next;
1852
1853                         /* force fold unfiltered entry for simplicity */
1854                         parent->unfolded = false;
1855                         parent->has_no_entry = false;
1856                         parent->row_offset = 0;
1857                         parent->nr_rows = 0;
1858 next:
1859                         parent = parent->parent_he;
1860                 }
1861         }
1862
1863         if (h->filtered)
1864                 return;
1865
1866         /* force fold unfiltered entry for simplicity */
1867         h->unfolded = false;
1868         h->has_no_entry = false;
1869         h->row_offset = 0;
1870         h->nr_rows = 0;
1871
1872         hists->stats.nr_non_filtered_samples += h->stat.nr_events;
1873
1874         hists__inc_filter_stats(hists, h);
1875         hists__calc_col_len(hists, h);
1876 }
1877
1878
1879 static bool hists__filter_entry_by_dso(struct hists *hists,
1880                                        struct hist_entry *he)
1881 {
1882         if (hists->dso_filter != NULL &&
1883             (he->ms.map == NULL || he->ms.map->dso != hists->dso_filter)) {
1884                 he->filtered |= (1 << HIST_FILTER__DSO);
1885                 return true;
1886         }
1887
1888         return false;
1889 }
1890
1891 static bool hists__filter_entry_by_thread(struct hists *hists,
1892                                           struct hist_entry *he)
1893 {
1894         if (hists->thread_filter != NULL &&
1895             he->thread != hists->thread_filter) {
1896                 he->filtered |= (1 << HIST_FILTER__THREAD);
1897                 return true;
1898         }
1899
1900         return false;
1901 }
1902
1903 static bool hists__filter_entry_by_symbol(struct hists *hists,
1904                                           struct hist_entry *he)
1905 {
1906         if (hists->symbol_filter_str != NULL &&
1907             (!he->ms.sym || strstr(he->ms.sym->name,
1908                                    hists->symbol_filter_str) == NULL)) {
1909                 he->filtered |= (1 << HIST_FILTER__SYMBOL);
1910                 return true;
1911         }
1912
1913         return false;
1914 }
1915
1916 static bool hists__filter_entry_by_socket(struct hists *hists,
1917                                           struct hist_entry *he)
1918 {
1919         if ((hists->socket_filter > -1) &&
1920             (he->socket != hists->socket_filter)) {
1921                 he->filtered |= (1 << HIST_FILTER__SOCKET);
1922                 return true;
1923         }
1924
1925         return false;
1926 }
1927
1928 typedef bool (*filter_fn_t)(struct hists *hists, struct hist_entry *he);
1929
1930 static void hists__filter_by_type(struct hists *hists, int type, filter_fn_t filter)
1931 {
1932         struct rb_node *nd;
1933
1934         hists->stats.nr_non_filtered_samples = 0;
1935
1936         hists__reset_filter_stats(hists);
1937         hists__reset_col_len(hists);
1938
1939         for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) {
1940                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
1941
1942                 if (filter(hists, h))
1943                         continue;
1944
1945                 hists__remove_entry_filter(hists, h, type);
1946         }
1947 }
1948
1949 static void resort_filtered_entry(struct rb_root *root, struct hist_entry *he)
1950 {
1951         struct rb_node **p = &root->rb_node;
1952         struct rb_node *parent = NULL;
1953         struct hist_entry *iter;
1954         struct rb_root new_root = RB_ROOT;
1955         struct rb_node *nd;
1956
1957         while (*p != NULL) {
1958                 parent = *p;
1959                 iter = rb_entry(parent, struct hist_entry, rb_node);
1960
1961                 if (hist_entry__sort(he, iter) > 0)
1962                         p = &(*p)->rb_left;
1963                 else
1964                         p = &(*p)->rb_right;
1965         }
1966
1967         rb_link_node(&he->rb_node, parent, p);
1968         rb_insert_color(&he->rb_node, root);
1969
1970         if (he->leaf || he->filtered)
1971                 return;
1972
1973         nd = rb_first(&he->hroot_out);
1974         while (nd) {
1975                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
1976
1977                 nd = rb_next(nd);
1978                 rb_erase(&h->rb_node, &he->hroot_out);
1979
1980                 resort_filtered_entry(&new_root, h);
1981         }
1982
1983         he->hroot_out = new_root;
1984 }
1985
1986 static void hists__filter_hierarchy(struct hists *hists, int type, const void *arg)
1987 {
1988         struct rb_node *nd;
1989         struct rb_root new_root = RB_ROOT;
1990
1991         hists->stats.nr_non_filtered_samples = 0;
1992
1993         hists__reset_filter_stats(hists);
1994         hists__reset_col_len(hists);
1995
1996         nd = rb_first(&hists->entries);
1997         while (nd) {
1998                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
1999                 int ret;
2000
2001                 ret = hist_entry__filter(h, type, arg);
2002
2003                 /*
2004                  * case 1. non-matching type
2005                  * zero out the period, set filter marker and move to child
2006                  */
2007                 if (ret < 0) {
2008                         memset(&h->stat, 0, sizeof(h->stat));
2009                         h->filtered |= (1 << type);
2010
2011                         nd = __rb_hierarchy_next(&h->rb_node, HMD_FORCE_CHILD);
2012                 }
2013                 /*
2014                  * case 2. matched type (filter out)
2015                  * set filter marker and move to next
2016                  */
2017                 else if (ret == 1) {
2018                         h->filtered |= (1 << type);
2019
2020                         nd = __rb_hierarchy_next(&h->rb_node, HMD_FORCE_SIBLING);
2021                 }
2022                 /*
2023                  * case 3. ok (not filtered)
2024                  * add period to hists and parents, erase the filter marker
2025                  * and move to next sibling
2026                  */
2027                 else {
2028                         hists__remove_entry_filter(hists, h, type);
2029
2030                         nd = __rb_hierarchy_next(&h->rb_node, HMD_FORCE_SIBLING);
2031                 }
2032         }
2033
2034         hierarchy_recalc_total_periods(hists);
2035
2036         /*
2037          * resort output after applying a new filter since filter in a lower
2038          * hierarchy can change periods in a upper hierarchy.
2039          */
2040         nd = rb_first(&hists->entries);
2041         while (nd) {
2042                 struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
2043
2044                 nd = rb_next(nd);
2045                 rb_erase(&h->rb_node, &hists->entries);
2046
2047                 resort_filtered_entry(&new_root, h);
2048         }
2049
2050         hists->entries = new_root;
2051 }
2052
2053 void hists__filter_by_thread(struct hists *hists)
2054 {
2055         if (symbol_conf.report_hierarchy)
2056                 hists__filter_hierarchy(hists, HIST_FILTER__THREAD,
2057                                         hists->thread_filter);
2058         else
2059                 hists__filter_by_type(hists, HIST_FILTER__THREAD,
2060                                       hists__filter_entry_by_thread);
2061 }
2062
2063 void hists__filter_by_dso(struct hists *hists)
2064 {
2065         if (symbol_conf.report_hierarchy)
2066                 hists__filter_hierarchy(hists, HIST_FILTER__DSO,
2067                                         hists->dso_filter);
2068         else
2069                 hists__filter_by_type(hists, HIST_FILTER__DSO,
2070                                       hists__filter_entry_by_dso);
2071 }
2072
2073 void hists__filter_by_symbol(struct hists *hists)
2074 {
2075         if (symbol_conf.report_hierarchy)
2076                 hists__filter_hierarchy(hists, HIST_FILTER__SYMBOL,
2077                                         hists->symbol_filter_str);
2078         else
2079                 hists__filter_by_type(hists, HIST_FILTER__SYMBOL,
2080                                       hists__filter_entry_by_symbol);
2081 }
2082
2083 void hists__filter_by_socket(struct hists *hists)
2084 {
2085         if (symbol_conf.report_hierarchy)
2086                 hists__filter_hierarchy(hists, HIST_FILTER__SOCKET,
2087                                         &hists->socket_filter);
2088         else
2089                 hists__filter_by_type(hists, HIST_FILTER__SOCKET,
2090                                       hists__filter_entry_by_socket);
2091 }
2092
2093 void events_stats__inc(struct events_stats *stats, u32 type)
2094 {
2095         ++stats->nr_events[0];
2096         ++stats->nr_events[type];
2097 }
2098
2099 void hists__inc_nr_events(struct hists *hists, u32 type)
2100 {
2101         events_stats__inc(&hists->stats, type);
2102 }
2103
2104 void hists__inc_nr_samples(struct hists *hists, bool filtered)
2105 {
2106         events_stats__inc(&hists->stats, PERF_RECORD_SAMPLE);
2107         if (!filtered)
2108                 hists->stats.nr_non_filtered_samples++;
2109 }
2110
2111 static struct hist_entry *hists__add_dummy_entry(struct hists *hists,
2112                                                  struct hist_entry *pair)
2113 {
2114         struct rb_root *root;
2115         struct rb_node **p;
2116         struct rb_node *parent = NULL;
2117         struct hist_entry *he;
2118         int64_t cmp;
2119
2120         if (hists__has(hists, need_collapse))
2121                 root = &hists->entries_collapsed;
2122         else
2123                 root = hists->entries_in;
2124
2125         p = &root->rb_node;
2126
2127         while (*p != NULL) {
2128                 parent = *p;
2129                 he = rb_entry(parent, struct hist_entry, rb_node_in);
2130
2131                 cmp = hist_entry__collapse(he, pair);
2132
2133                 if (!cmp)
2134                         goto out;
2135
2136                 if (cmp < 0)
2137                         p = &(*p)->rb_left;
2138                 else
2139                         p = &(*p)->rb_right;
2140         }
2141
2142         he = hist_entry__new(pair, true);
2143         if (he) {
2144                 memset(&he->stat, 0, sizeof(he->stat));
2145                 he->hists = hists;
2146                 if (symbol_conf.cumulate_callchain)
2147                         memset(he->stat_acc, 0, sizeof(he->stat));
2148                 rb_link_node(&he->rb_node_in, parent, p);
2149                 rb_insert_color(&he->rb_node_in, root);
2150                 hists__inc_stats(hists, he);
2151                 he->dummy = true;
2152         }
2153 out:
2154         return he;
2155 }
2156
2157 static struct hist_entry *add_dummy_hierarchy_entry(struct hists *hists,
2158                                                     struct rb_root *root,
2159                                                     struct hist_entry *pair)
2160 {
2161         struct rb_node **p;
2162         struct rb_node *parent = NULL;
2163         struct hist_entry *he;
2164         struct perf_hpp_fmt *fmt;
2165
2166         p = &root->rb_node;
2167         while (*p != NULL) {
2168                 int64_t cmp = 0;
2169
2170                 parent = *p;
2171                 he = rb_entry(parent, struct hist_entry, rb_node_in);
2172
2173                 perf_hpp_list__for_each_sort_list(he->hpp_list, fmt) {
2174                         cmp = fmt->collapse(fmt, he, pair);
2175                         if (cmp)
2176                                 break;
2177                 }
2178                 if (!cmp)
2179                         goto out;
2180
2181                 if (cmp < 0)
2182                         p = &parent->rb_left;
2183                 else
2184                         p = &parent->rb_right;
2185         }
2186
2187         he = hist_entry__new(pair, true);
2188         if (he) {
2189                 rb_link_node(&he->rb_node_in, parent, p);
2190                 rb_insert_color(&he->rb_node_in, root);
2191
2192                 he->dummy = true;
2193                 he->hists = hists;
2194                 memset(&he->stat, 0, sizeof(he->stat));
2195                 hists__inc_stats(hists, he);
2196         }
2197 out:
2198         return he;
2199 }
2200
2201 static struct hist_entry *hists__find_entry(struct hists *hists,
2202                                             struct hist_entry *he)
2203 {
2204         struct rb_node *n;
2205
2206         if (hists__has(hists, need_collapse))
2207                 n = hists->entries_collapsed.rb_node;
2208         else
2209                 n = hists->entries_in->rb_node;
2210
2211         while (n) {
2212                 struct hist_entry *iter = rb_entry(n, struct hist_entry, rb_node_in);
2213                 int64_t cmp = hist_entry__collapse(iter, he);
2214
2215                 if (cmp < 0)
2216                         n = n->rb_left;
2217                 else if (cmp > 0)
2218                         n = n->rb_right;
2219                 else
2220                         return iter;
2221         }
2222
2223         return NULL;
2224 }
2225
2226 static struct hist_entry *hists__find_hierarchy_entry(struct rb_root *root,
2227                                                       struct hist_entry *he)
2228 {
2229         struct rb_node *n = root->rb_node;
2230
2231         while (n) {
2232                 struct hist_entry *iter;
2233                 struct perf_hpp_fmt *fmt;
2234                 int64_t cmp = 0;
2235
2236                 iter = rb_entry(n, struct hist_entry, rb_node_in);
2237                 perf_hpp_list__for_each_sort_list(he->hpp_list, fmt) {
2238                         cmp = fmt->collapse(fmt, iter, he);
2239                         if (cmp)
2240                                 break;
2241                 }
2242
2243                 if (cmp < 0)
2244                         n = n->rb_left;
2245                 else if (cmp > 0)
2246                         n = n->rb_right;
2247                 else
2248                         return iter;
2249         }
2250
2251         return NULL;
2252 }
2253
2254 static void hists__match_hierarchy(struct rb_root *leader_root,
2255                                    struct rb_root *other_root)
2256 {
2257         struct rb_node *nd;
2258         struct hist_entry *pos, *pair;
2259
2260         for (nd = rb_first(leader_root); nd; nd = rb_next(nd)) {
2261                 pos  = rb_entry(nd, struct hist_entry, rb_node_in);
2262                 pair = hists__find_hierarchy_entry(other_root, pos);
2263
2264                 if (pair) {
2265                         hist_entry__add_pair(pair, pos);
2266                         hists__match_hierarchy(&pos->hroot_in, &pair->hroot_in);
2267                 }
2268         }
2269 }
2270
2271 /*
2272  * Look for pairs to link to the leader buckets (hist_entries):
2273  */
2274 void hists__match(struct hists *leader, struct hists *other)
2275 {
2276         struct rb_root *root;
2277         struct rb_node *nd;
2278         struct hist_entry *pos, *pair;
2279
2280         if (symbol_conf.report_hierarchy) {
2281                 /* hierarchy report always collapses entries */
2282                 return hists__match_hierarchy(&leader->entries_collapsed,
2283                                               &other->entries_collapsed);
2284         }
2285
2286         if (hists__has(leader, need_collapse))
2287                 root = &leader->entries_collapsed;
2288         else
2289                 root = leader->entries_in;
2290
2291         for (nd = rb_first(root); nd; nd = rb_next(nd)) {
2292                 pos  = rb_entry(nd, struct hist_entry, rb_node_in);
2293                 pair = hists__find_entry(other, pos);
2294
2295                 if (pair)
2296                         hist_entry__add_pair(pair, pos);
2297         }
2298 }
2299
2300 static int hists__link_hierarchy(struct hists *leader_hists,
2301                                  struct hist_entry *parent,
2302                                  struct rb_root *leader_root,
2303                                  struct rb_root *other_root)
2304 {
2305         struct rb_node *nd;
2306         struct hist_entry *pos, *leader;
2307
2308         for (nd = rb_first(other_root); nd; nd = rb_next(nd)) {
2309                 pos = rb_entry(nd, struct hist_entry, rb_node_in);
2310
2311                 if (hist_entry__has_pairs(pos)) {
2312                         bool found = false;
2313
2314                         list_for_each_entry(leader, &pos->pairs.head, pairs.node) {
2315                                 if (leader->hists == leader_hists) {
2316                                         found = true;
2317                                         break;
2318                                 }
2319                         }
2320                         if (!found)
2321                                 return -1;
2322                 } else {
2323                         leader = add_dummy_hierarchy_entry(leader_hists,
2324                                                            leader_root, pos);
2325                         if (leader == NULL)
2326                                 return -1;
2327
2328                         /* do not point parent in the pos */
2329                         leader->parent_he = parent;
2330
2331                         hist_entry__add_pair(pos, leader);
2332                 }
2333
2334                 if (!pos->leaf) {
2335                         if (hists__link_hierarchy(leader_hists, leader,
2336                                                   &leader->hroot_in,
2337                                                   &pos->hroot_in) < 0)
2338                                 return -1;
2339                 }
2340         }
2341         return 0;
2342 }
2343
2344 /*
2345  * Look for entries in the other hists that are not present in the leader, if
2346  * we find them, just add a dummy entry on the leader hists, with period=0,
2347  * nr_events=0, to serve as the list header.
2348  */
2349 int hists__link(struct hists *leader, struct hists *other)
2350 {
2351         struct rb_root *root;
2352         struct rb_node *nd;
2353         struct hist_entry *pos, *pair;
2354
2355         if (symbol_conf.report_hierarchy) {
2356                 /* hierarchy report always collapses entries */
2357                 return hists__link_hierarchy(leader, NULL,
2358                                              &leader->entries_collapsed,
2359                                              &other->entries_collapsed);
2360         }
2361
2362         if (hists__has(other, need_collapse))
2363                 root = &other->entries_collapsed;
2364         else
2365                 root = other->entries_in;
2366
2367         for (nd = rb_first(root); nd; nd = rb_next(nd)) {
2368                 pos = rb_entry(nd, struct hist_entry, rb_node_in);
2369
2370                 if (!hist_entry__has_pairs(pos)) {
2371                         pair = hists__add_dummy_entry(leader, pos);
2372                         if (pair == NULL)
2373                                 return -1;
2374                         hist_entry__add_pair(pos, pair);
2375                 }
2376         }
2377
2378         return 0;
2379 }
2380
2381 void hist__account_cycles(struct branch_stack *bs, struct addr_location *al,
2382                           struct perf_sample *sample, bool nonany_branch_mode)
2383 {
2384         struct branch_info *bi;
2385
2386         /* If we have branch cycles always annotate them. */
2387         if (bs && bs->nr && bs->entries[0].flags.cycles) {
2388                 int i;
2389
2390                 bi = sample__resolve_bstack(sample, al);
2391                 if (bi) {
2392                         struct addr_map_symbol *prev = NULL;
2393
2394                         /*
2395                          * Ignore errors, still want to process the
2396                          * other entries.
2397                          *
2398                          * For non standard branch modes always
2399                          * force no IPC (prev == NULL)
2400                          *
2401                          * Note that perf stores branches reversed from
2402                          * program order!
2403                          */
2404                         for (i = bs->nr - 1; i >= 0; i--) {
2405                                 addr_map_symbol__account_cycles(&bi[i].from,
2406                                         nonany_branch_mode ? NULL : prev,
2407                                         bi[i].flags.cycles);
2408                                 prev = &bi[i].to;
2409                         }
2410                         free(bi);
2411                 }
2412         }
2413 }
2414
2415 size_t perf_evlist__fprintf_nr_events(struct perf_evlist *evlist, FILE *fp)
2416 {
2417         struct perf_evsel *pos;
2418         size_t ret = 0;
2419
2420         evlist__for_each_entry(evlist, pos) {
2421                 ret += fprintf(fp, "%s stats:\n", perf_evsel__name(pos));
2422                 ret += events_stats__fprintf(&evsel__hists(pos)->stats, fp);
2423         }
2424
2425         return ret;
2426 }
2427
2428
2429 u64 hists__total_period(struct hists *hists)
2430 {
2431         return symbol_conf.filter_relative ? hists->stats.total_non_filtered_period :
2432                 hists->stats.total_period;
2433 }
2434
2435 int parse_filter_percentage(const struct option *opt __maybe_unused,
2436                             const char *arg, int unset __maybe_unused)
2437 {
2438         if (!strcmp(arg, "relative"))
2439                 symbol_conf.filter_relative = true;
2440         else if (!strcmp(arg, "absolute"))
2441                 symbol_conf.filter_relative = false;
2442         else
2443                 return -1;
2444
2445         return 0;
2446 }
2447
2448 int perf_hist_config(const char *var, const char *value)
2449 {
2450         if (!strcmp(var, "hist.percentage"))
2451                 return parse_filter_percentage(NULL, value, 0);
2452
2453         return 0;
2454 }
2455
2456 int __hists__init(struct hists *hists, struct perf_hpp_list *hpp_list)
2457 {
2458         memset(hists, 0, sizeof(*hists));
2459         hists->entries_in_array[0] = hists->entries_in_array[1] = RB_ROOT;
2460         hists->entries_in = &hists->entries_in_array[0];
2461         hists->entries_collapsed = RB_ROOT;
2462         hists->entries = RB_ROOT;
2463         pthread_mutex_init(&hists->lock, NULL);
2464         hists->socket_filter = -1;
2465         hists->hpp_list = hpp_list;
2466         INIT_LIST_HEAD(&hists->hpp_formats);
2467         return 0;
2468 }
2469
2470 static void hists__delete_remaining_entries(struct rb_root *root)
2471 {
2472         struct rb_node *node;
2473         struct hist_entry *he;
2474
2475         while (!RB_EMPTY_ROOT(root)) {
2476                 node = rb_first(root);
2477                 rb_erase(node, root);
2478
2479                 he = rb_entry(node, struct hist_entry, rb_node_in);
2480                 hist_entry__delete(he);
2481         }
2482 }
2483
2484 static void hists__delete_all_entries(struct hists *hists)
2485 {
2486         hists__delete_entries(hists);
2487         hists__delete_remaining_entries(&hists->entries_in_array[0]);
2488         hists__delete_remaining_entries(&hists->entries_in_array[1]);
2489         hists__delete_remaining_entries(&hists->entries_collapsed);
2490 }
2491
2492 static void hists_evsel__exit(struct perf_evsel *evsel)
2493 {
2494         struct hists *hists = evsel__hists(evsel);
2495         struct perf_hpp_fmt *fmt, *pos;
2496         struct perf_hpp_list_node *node, *tmp;
2497
2498         hists__delete_all_entries(hists);
2499
2500         list_for_each_entry_safe(node, tmp, &hists->hpp_formats, list) {
2501                 perf_hpp_list__for_each_format_safe(&node->hpp, fmt, pos) {
2502                         list_del(&fmt->list);
2503                         free(fmt);
2504                 }
2505                 list_del(&node->list);
2506                 free(node);
2507         }
2508 }
2509
2510 static int hists_evsel__init(struct perf_evsel *evsel)
2511 {
2512         struct hists *hists = evsel__hists(evsel);
2513
2514         __hists__init(hists, &perf_hpp_list);
2515         return 0;
2516 }
2517
2518 /*
2519  * XXX We probably need a hists_evsel__exit() to free the hist_entries
2520  * stored in the rbtree...
2521  */
2522
2523 int hists__init(void)
2524 {
2525         int err = perf_evsel__object_config(sizeof(struct hists_evsel),
2526                                             hists_evsel__init,
2527                                             hists_evsel__exit);
2528         if (err)
2529                 fputs("FATAL ERROR: Couldn't setup hists class\n", stderr);
2530
2531         return err;
2532 }
2533
2534 void perf_hpp_list__init(struct perf_hpp_list *list)
2535 {
2536         INIT_LIST_HEAD(&list->fields);
2537         INIT_LIST_HEAD(&list->sorts);
2538 }