Pileus Git - ~andy/linux/blob - tools/perf/builtin-top.c

   1 /*
   2  * builtin-top.c
   3  *
   4  * Builtin top command: Display a continuously updated profile of
   5  * any workload, CPU or specific PID.
   6  *
   7  * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
   8  *               2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
   9  *
  10  * Improvements and fixes by:
  11  *
  12  *   Arjan van de Ven <arjan@linux.intel.com>
  13  *   Yanmin Zhang <yanmin.zhang@intel.com>
  14  *   Wu Fengguang <fengguang.wu@intel.com>
  15  *   Mike Galbraith <efault@gmx.de>
  16  *   Paul Mackerras <paulus@samba.org>
  17  *
  18  * Released under the GPL v2. (and only v2, not any later version)
  19  */
  20 #include "builtin.h"
  21
  22 #include "perf.h"
  23
  24 #include "util/annotate.h"
  25 #include "util/cache.h"
  26 #include "util/color.h"
  27 #include "util/evlist.h"
  28 #include "util/evsel.h"
  29 #include "util/session.h"
  30 #include "util/symbol.h"
  31 #include "util/thread.h"
  32 #include "util/thread_map.h"
  33 #include "util/top.h"
  34 #include "util/util.h"
  35 #include <linux/rbtree.h>
  36 #include "util/parse-options.h"
  37 #include "util/parse-events.h"
  38 #include "util/cpumap.h"
  39 #include "util/xyarray.h"
  40 #include "util/sort.h"
  41 #include "util/intlist.h"
  42
  43 #include "util/debug.h"
  44
  45 #include <assert.h>
  46 #include <elf.h>
  47 #include <fcntl.h>
  48
  49 #include <stdio.h>
  50 #include <termios.h>
  51 #include <unistd.h>
  52 #include <inttypes.h>
  53
  54 #include <errno.h>
  55 #include <time.h>
  56 #include <sched.h>
  57
  58 #include <sys/syscall.h>
  59 #include <sys/ioctl.h>
  60 #include <sys/poll.h>
  61 #include <sys/prctl.h>
  62 #include <sys/wait.h>
  63 #include <sys/uio.h>
  64 #include <sys/utsname.h>
  65 #include <sys/mman.h>
  66
  67 #include <linux/unistd.h>
  68 #include <linux/types.h>
  69
  70 void get_term_dimensions(struct winsize *ws)
  71 {
  72         char *s = getenv("LINES");
  73
  74         if (s != NULL) {
  75                 ws->ws_row = atoi(s);
  76                 s = getenv("COLUMNS");
  77                 if (s != NULL) {
  78                         ws->ws_col = atoi(s);
  79                         if (ws->ws_row && ws->ws_col)
  80                                 return;
  81                 }
  82         }
  83 #ifdef TIOCGWINSZ
  84         if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
  85             ws->ws_row && ws->ws_col)
  86                 return;
  87 #endif
  88         ws->ws_row = 25;
  89         ws->ws_col = 80;
  90 }
  91
  92 static void perf_top__update_print_entries(struct perf_top *top)
  93 {
  94         if (top->print_entries > 9)
  95                 top->print_entries -= 9;
  96 }
  97
  98 static void perf_top__sig_winch(int sig __maybe_unused,
  99                                 siginfo_t *info __maybe_unused, void *arg)
 100 {
 101         struct perf_top *top = arg;
 102
 103         get_term_dimensions(&top->winsize);
 104         if (!top->print_entries
 105             || (top->print_entries+4) > top->winsize.ws_row) {
 106                 top->print_entries = top->winsize.ws_row;
 107         } else {
 108                 top->print_entries += 4;
 109                 top->winsize.ws_row = top->print_entries;
 110         }
 111         perf_top__update_print_entries(top);
 112 }
 113
 114 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
 115 {
 116         struct symbol *sym;
 117         struct annotation *notes;
 118         struct map *map;
 119         int err = -1;
 120
 121         if (!he || !he->ms.sym)
 122                 return -1;
 123
 124         sym = he->ms.sym;
 125         map = he->ms.map;
 126
 127         /*
 128          * We can't annotate with just /proc/kallsyms
 129          */
 130         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
 131                 pr_err("Can't annotate %s: No vmlinux file was found in the "
 132                        "path\n", sym->name);
 133                 sleep(1);
 134                 return -1;
 135         }
 136
 137         notes = symbol__annotation(sym);
 138         if (notes->src != NULL) {
 139                 pthread_mutex_lock(&notes->lock);
 140                 goto out_assign;
 141         }
 142
 143         pthread_mutex_lock(&notes->lock);
 144
 145         if (symbol__alloc_hist(sym) < 0) {
 146                 pthread_mutex_unlock(&notes->lock);
 147                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 148                        sym->name);
 149                 sleep(1);
 150                 return err;
 151         }
 152
 153         err = symbol__annotate(sym, map, 0);
 154         if (err == 0) {
 155 out_assign:
 156                 top->sym_filter_entry = he;
 157         }
 158
 159         pthread_mutex_unlock(&notes->lock);
 160         return err;
 161 }
 162
 163 static void __zero_source_counters(struct hist_entry *he)
 164 {
 165         struct symbol *sym = he->ms.sym;
 166         symbol__annotate_zero_histograms(sym);
 167 }
 168
 169 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
 170 {
 171         struct utsname uts;
 172         int err = uname(&uts);
 173
 174         ui__warning("Out of bounds address found:\n\n"
 175                     "Addr:   %" PRIx64 "\n"
 176                     "DSO:    %s %c\n"
 177                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
 178                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
 179                     "Arch:   %s\n"
 180                     "Kernel: %s\n"
 181                     "Tools:  %s\n\n"
 182                     "Not all samples will be on the annotation output.\n\n"
 183                     "Please report to linux-kernel@vger.kernel.org\n",
 184                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
 185                     map->start, map->end, sym->start, sym->end,
 186                     sym->binding == STB_GLOBAL ? 'g' :
 187                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
 188                     err ? "[unknown]" : uts.machine,
 189                     err ? "[unknown]" : uts.release, perf_version_string);
 190         if (use_browser <= 0)
 191                 sleep(5);
 192
 193         map->erange_warned = true;
 194 }
 195
 196 static void perf_top__record_precise_ip(struct perf_top *top,
 197                                         struct hist_entry *he,
 198                                         int counter, u64 ip)
 199 {
 200         struct annotation *notes;
 201         struct symbol *sym;
 202         int err;
 203
 204         if (he == NULL || he->ms.sym == NULL ||
 205             ((top->sym_filter_entry == NULL ||
 206               top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
 207                 return;
 208
 209         sym = he->ms.sym;
 210         notes = symbol__annotation(sym);
 211
 212         if (pthread_mutex_trylock(&notes->lock))
 213                 return;
 214
 215         if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
 216                 pthread_mutex_unlock(&notes->lock);
 217                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 218                        sym->name);
 219                 sleep(1);
 220                 return;
 221         }
 222
 223         ip = he->ms.map->map_ip(he->ms.map, ip);
 224         err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
 225
 226         pthread_mutex_unlock(&notes->lock);
 227
 228         if (err == -ERANGE && !he->ms.map->erange_warned)
 229                 ui__warn_map_erange(he->ms.map, sym, ip);
 230 }
 231
 232 static void perf_top__show_details(struct perf_top *top)
 233 {
 234         struct hist_entry *he = top->sym_filter_entry;
 235         struct annotation *notes;
 236         struct symbol *symbol;
 237         int more;
 238
 239         if (!he)
 240                 return;
 241
 242         symbol = he->ms.sym;
 243         notes = symbol__annotation(symbol);
 244
 245         pthread_mutex_lock(&notes->lock);
 246
 247         if (notes->src == NULL)
 248                 goto out_unlock;
 249
 250         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
 251         printf("  Events  Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
 252
 253         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
 254                                        0, top->sym_pcnt_filter, top->print_entries, 4);
 255         if (top->zero)
 256                 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
 257         else
 258                 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
 259         if (more != 0)
 260                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 261 out_unlock:
 262         pthread_mutex_unlock(&notes->lock);
 263 }
 264
 265 static const char               CONSOLE_CLEAR[] = "\e[H\e[2J";
 266
 267 static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
 268                                                      struct addr_location *al,
 269                                                      struct perf_sample *sample)
 270 {
 271         struct hist_entry *he;
 272
 273         he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
 274         if (he == NULL)
 275                 return NULL;
 276
 277         hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
 278         return he;
 279 }
 280
 281 static void perf_top__print_sym_table(struct perf_top *top)
 282 {
 283         char bf[160];
 284         int printed = 0;
 285         const int win_width = top->winsize.ws_col - 1;
 286
 287         puts(CONSOLE_CLEAR);
 288
 289         perf_top__header_snprintf(top, bf, sizeof(bf));
 290         printf("%s\n", bf);
 291
 292         perf_top__reset_sample_counters(top);
 293
 294         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 295
 296         if (top->sym_evsel->hists.stats.nr_lost_warned !=
 297             top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
 298                 top->sym_evsel->hists.stats.nr_lost_warned =
 299                         top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
 300                 color_fprintf(stdout, PERF_COLOR_RED,
 301                               "WARNING: LOST %d chunks, Check IO/CPU overload",
 302                               top->sym_evsel->hists.stats.nr_lost_warned);
 303                 ++printed;
 304         }
 305
 306         if (top->sym_filter_entry) {
 307                 perf_top__show_details(top);
 308                 return;
 309         }
 310
 311         hists__collapse_resort_threaded(&top->sym_evsel->hists);
 312         hists__output_resort_threaded(&top->sym_evsel->hists);
 313         hists__decay_entries_threaded(&top->sym_evsel->hists,
 314                                       top->hide_user_symbols,
 315                                       top->hide_kernel_symbols);
 316         hists__output_recalc_col_len(&top->sym_evsel->hists,
 317                                      top->winsize.ws_row - 3);
 318         putchar('\n');
 319         hists__fprintf(&top->sym_evsel->hists, false,
 320                        top->winsize.ws_row - 4 - printed, win_width, stdout);
 321 }
 322
 323 static void prompt_integer(int *target, const char *msg)
 324 {
 325         char *buf = malloc(0), *p;
 326         size_t dummy = 0;
 327         int tmp;
 328
 329         fprintf(stdout, "\n%s: ", msg);
 330         if (getline(&buf, &dummy, stdin) < 0)
 331                 return;
 332
 333         p = strchr(buf, '\n');
 334         if (p)
 335                 *p = 0;
 336
 337         p = buf;
 338         while(*p) {
 339                 if (!isdigit(*p))
 340                         goto out_free;
 341                 p++;
 342         }
 343         tmp = strtoul(buf, NULL, 10);
 344         *target = tmp;
 345 out_free:
 346         free(buf);
 347 }
 348
 349 static void prompt_percent(int *target, const char *msg)
 350 {
 351         int tmp = 0;
 352
 353         prompt_integer(&tmp, msg);
 354         if (tmp >= 0 && tmp <= 100)
 355                 *target = tmp;
 356 }
 357
 358 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 359 {
 360         char *buf = malloc(0), *p;
 361         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 362         struct rb_node *next;
 363         size_t dummy = 0;
 364
 365         /* zero counters of active symbol */
 366         if (syme) {
 367                 __zero_source_counters(syme);
 368                 top->sym_filter_entry = NULL;
 369         }
 370
 371         fprintf(stdout, "\n%s: ", msg);
 372         if (getline(&buf, &dummy, stdin) < 0)
 373                 goto out_free;
 374
 375         p = strchr(buf, '\n');
 376         if (p)
 377                 *p = 0;
 378
 379         next = rb_first(&top->sym_evsel->hists.entries);
 380         while (next) {
 381                 n = rb_entry(next, struct hist_entry, rb_node);
 382                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
 383                         found = n;
 384                         break;
 385                 }
 386                 next = rb_next(&n->rb_node);
 387         }
 388
 389         if (!found) {
 390                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 391                 sleep(1);
 392         } else
 393                 perf_top__parse_source(top, found);
 394
 395 out_free:
 396         free(buf);
 397 }
 398
 399 static void perf_top__print_mapped_keys(struct perf_top *top)
 400 {
 401         char *name = NULL;
 402
 403         if (top->sym_filter_entry) {
 404                 struct symbol *sym = top->sym_filter_entry->ms.sym;
 405                 name = sym->name;
 406         }
 407
 408         fprintf(stdout, "\nMapped keys:\n");
 409         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
 410         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
 411
 412         if (top->evlist->nr_entries > 1)
 413                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
 414
 415         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
 416
 417         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
 418         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 419         fprintf(stdout, "\t[S]     stop annotation.\n");
 420
 421         fprintf(stdout,
 422                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 423                 top->hide_kernel_symbols ? "yes" : "no");
 424         fprintf(stdout,
 425                 "\t[U]     hide user symbols.               \t(%s)\n",
 426                 top->hide_user_symbols ? "yes" : "no");
 427         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
 428         fprintf(stdout, "\t[qQ]    quit.\n");
 429 }
 430
 431 static int perf_top__key_mapped(struct perf_top *top, int c)
 432 {
 433         switch (c) {
 434                 case 'd':
 435                 case 'e':
 436                 case 'f':
 437                 case 'z':
 438                 case 'q':
 439                 case 'Q':
 440                 case 'K':
 441                 case 'U':
 442                 case 'F':
 443                 case 's':
 444                 case 'S':
 445                         return 1;
 446                 case 'E':
 447                         return top->evlist->nr_entries > 1 ? 1 : 0;
 448                 default:
 449                         break;
 450         }
 451
 452         return 0;
 453 }
 454
 455 static void perf_top__handle_keypress(struct perf_top *top, int c)
 456 {
 457         if (!perf_top__key_mapped(top, c)) {
 458                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 459                 struct termios tc, save;
 460
 461                 perf_top__print_mapped_keys(top);
 462                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 463                 fflush(stdout);
 464
 465                 tcgetattr(0, &save);
 466                 tc = save;
 467                 tc.c_lflag &= ~(ICANON | ECHO);
 468                 tc.c_cc[VMIN] = 0;
 469                 tc.c_cc[VTIME] = 0;
 470                 tcsetattr(0, TCSANOW, &tc);
 471
 472                 poll(&stdin_poll, 1, -1);
 473                 c = getc(stdin);
 474
 475                 tcsetattr(0, TCSAFLUSH, &save);
 476                 if (!perf_top__key_mapped(top, c))
 477                         return;
 478         }
 479
 480         switch (c) {
 481                 case 'd':
 482                         prompt_integer(&top->delay_secs, "Enter display delay");
 483                         if (top->delay_secs < 1)
 484                                 top->delay_secs = 1;
 485                         break;
 486                 case 'e':
 487                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
 488                         if (top->print_entries == 0) {
 489                                 struct sigaction act = {
 490                                         .sa_sigaction = perf_top__sig_winch,
 491                                         .sa_flags     = SA_SIGINFO,
 492                                 };
 493                                 perf_top__sig_winch(SIGWINCH, NULL, top);
 494                                 sigaction(SIGWINCH, &act, NULL);
 495                         } else {
 496                                 perf_top__sig_winch(SIGWINCH, NULL, top);
 497                                 signal(SIGWINCH, SIG_DFL);
 498                         }
 499                         break;
 500                 case 'E':
 501                         if (top->evlist->nr_entries > 1) {
 502                                 /* Select 0 as the default event: */
 503                                 int counter = 0;
 504
 505                                 fprintf(stderr, "\nAvailable events:");
 506
 507                                 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
 508                                         fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
 509
 510                                 prompt_integer(&counter, "Enter details event counter");
 511
 512                                 if (counter >= top->evlist->nr_entries) {
 513                                         top->sym_evsel = perf_evlist__first(top->evlist);
 514                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
 515                                         sleep(1);
 516                                         break;
 517                                 }
 518                                 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
 519                                         if (top->sym_evsel->idx == counter)
 520                                                 break;
 521                         } else
 522                                 top->sym_evsel = perf_evlist__first(top->evlist);
 523                         break;
 524                 case 'f':
 525                         prompt_integer(&top->count_filter, "Enter display event count filter");
 526                         break;
 527                 case 'F':
 528                         prompt_percent(&top->sym_pcnt_filter,
 529                                        "Enter details display event filter (percent)");
 530                         break;
 531                 case 'K':
 532                         top->hide_kernel_symbols = !top->hide_kernel_symbols;
 533                         break;
 534                 case 'q':
 535                 case 'Q':
 536                         printf("exiting.\n");
 537                         if (top->dump_symtab)
 538                                 perf_session__fprintf_dsos(top->session, stderr);
 539                         exit(0);
 540                 case 's':
 541                         perf_top__prompt_symbol(top, "Enter details symbol");
 542                         break;
 543                 case 'S':
 544                         if (!top->sym_filter_entry)
 545                                 break;
 546                         else {
 547                                 struct hist_entry *syme = top->sym_filter_entry;
 548
 549                                 top->sym_filter_entry = NULL;
 550                                 __zero_source_counters(syme);
 551                         }
 552                         break;
 553                 case 'U':
 554                         top->hide_user_symbols = !top->hide_user_symbols;
 555                         break;
 556                 case 'z':
 557                         top->zero = !top->zero;
 558                         break;
 559                 default:
 560                         break;
 561         }
 562 }
 563
 564 static void perf_top__sort_new_samples(void *arg)
 565 {
 566         struct perf_top *t = arg;
 567         perf_top__reset_sample_counters(t);
 568
 569         if (t->evlist->selected != NULL)
 570                 t->sym_evsel = t->evlist->selected;
 571
 572         hists__collapse_resort_threaded(&t->sym_evsel->hists);
 573         hists__output_resort_threaded(&t->sym_evsel->hists);
 574         hists__decay_entries_threaded(&t->sym_evsel->hists,
 575                                       t->hide_user_symbols,
 576                                       t->hide_kernel_symbols);
 577 }
 578
 579 static void *display_thread_tui(void *arg)
 580 {
 581         struct perf_evsel *pos;
 582         struct perf_top *top = arg;
 583         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
 584
 585         perf_top__sort_new_samples(top);
 586
 587         /*
 588          * Initialize the uid_filter_str, in the future the TUI will allow
 589          * Zooming in/out UIDs. For now juse use whatever the user passed
 590          * via --uid.
 591          */
 592         list_for_each_entry(pos, &top->evlist->entries, node)
 593                 pos->hists.uid_filter_str = top->target.uid_str;
 594
 595         perf_evlist__tui_browse_hists(top->evlist, help,
 596                                       perf_top__sort_new_samples,
 597                                       top, top->delay_secs);
 598
 599         exit_browser(0);
 600         exit(0);
 601         return NULL;
 602 }
 603
 604 static void *display_thread(void *arg)
 605 {
 606         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 607         struct termios tc, save;
 608         struct perf_top *top = arg;
 609         int delay_msecs, c;
 610
 611         tcgetattr(0, &save);
 612         tc = save;
 613         tc.c_lflag &= ~(ICANON | ECHO);
 614         tc.c_cc[VMIN] = 0;
 615         tc.c_cc[VTIME] = 0;
 616
 617         pthread__unblock_sigwinch();
 618 repeat:
 619         delay_msecs = top->delay_secs * 1000;
 620         tcsetattr(0, TCSANOW, &tc);
 621         /* trash return*/
 622         getc(stdin);
 623
 624         while (1) {
 625                 perf_top__print_sym_table(top);
 626                 /*
 627                  * Either timeout expired or we got an EINTR due to SIGWINCH,
 628                  * refresh screen in both cases.
 629                  */
 630                 switch (poll(&stdin_poll, 1, delay_msecs)) {
 631                 case 0:
 632                         continue;
 633                 case -1:
 634                         if (errno == EINTR)
 635                                 continue;
 636                         /* Fall trhu */
 637                 default:
 638                         goto process_hotkey;
 639                 }
 640         }
 641 process_hotkey:
 642         c = getc(stdin);
 643         tcsetattr(0, TCSAFLUSH, &save);
 644
 645         perf_top__handle_keypress(top, c);
 646         goto repeat;
 647
 648         return NULL;
 649 }
 650
 651 /* Tag samples to be skipped. */
 652 static const char *skip_symbols[] = {
 653         "intel_idle",
 654         "default_idle",
 655         "native_safe_halt",
 656         "cpu_idle",
 657         "enter_idle",
 658         "exit_idle",
 659         "mwait_idle",
 660         "mwait_idle_with_hints",
 661         "poll_idle",
 662         "ppc64_runlatch_off",
 663         "pseries_dedicated_idle_sleep",
 664         NULL
 665 };
 666
 667 static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym)
 668 {
 669         const char *name = sym->name;
 670         int i;
 671
 672         /*
 673          * ppc64 uses function descriptors and appends a '.' to the
 674          * start of every instruction address. Remove it.
 675          */
 676         if (name[0] == '.')
 677                 name++;
 678
 679         if (!strcmp(name, "_text") ||
 680             !strcmp(name, "_etext") ||
 681             !strcmp(name, "_sinittext") ||
 682             !strncmp("init_module", name, 11) ||
 683             !strncmp("cleanup_module", name, 14) ||
 684             strstr(name, "_text_start") ||
 685             strstr(name, "_text_end"))
 686                 return 1;
 687
 688         for (i = 0; skip_symbols[i]; i++) {
 689                 if (!strcmp(skip_symbols[i], name)) {
 690                         sym->ignore = true;
 691                         break;
 692                 }
 693         }
 694
 695         return 0;
 696 }
 697
 698 static void perf_event__process_sample(struct perf_tool *tool,
 699                                        const union perf_event *event,
 700                                        struct perf_evsel *evsel,
 701                                        struct perf_sample *sample,
 702                                        struct machine *machine)
 703 {
 704         struct perf_top *top = container_of(tool, struct perf_top, tool);
 705         struct symbol *parent = NULL;
 706         u64 ip = event->ip.ip;
 707         struct addr_location al;
 708         int err;
 709
 710         if (!machine && perf_guest) {
 711                 static struct intlist *seen;
 712
 713                 if (!seen)
 714                         seen = intlist__new();
 715
 716                 if (!intlist__has_entry(seen, event->ip.pid)) {
 717                         pr_err("Can't find guest [%d]'s kernel information\n",
 718                                 event->ip.pid);
 719                         intlist__add(seen, event->ip.pid);
 720                 }
 721                 return;
 722         }
 723
 724         if (!machine) {
 725                 pr_err("%u unprocessable samples recorded.",
 726                        top->session->hists.stats.nr_unprocessable_samples++);
 727                 return;
 728         }
 729
 730         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
 731                 top->exact_samples++;
 732
 733         if (perf_event__preprocess_sample(event, machine, &al, sample,
 734                                           symbol_filter) < 0 ||
 735             al.filtered)
 736                 return;
 737
 738         if (!top->kptr_restrict_warned &&
 739             symbol_conf.kptr_restrict &&
 740             al.cpumode == PERF_RECORD_MISC_KERNEL) {
 741                 ui__warning(
 742 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 743 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 744 "Kernel%s samples will not be resolved.\n",
 745                           !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
 746                           " modules" : "");
 747                 if (use_browser <= 0)
 748                         sleep(5);
 749                 top->kptr_restrict_warned = true;
 750         }
 751
 752         if (al.sym == NULL) {
 753                 const char *msg = "Kernel samples will not be resolved.\n";
 754                 /*
 755                  * As we do lazy loading of symtabs we only will know if the
 756                  * specified vmlinux file is invalid when we actually have a
 757                  * hit in kernel space and then try to load it. So if we get
 758                  * here and there are _no_ symbols in the DSO backing the
 759                  * kernel map, bail out.
 760                  *
 761                  * We may never get here, for instance, if we use -K/
 762                  * --hide-kernel-symbols, even if the user specifies an
 763                  * invalid --vmlinux ;-)
 764                  */
 765                 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
 766                     al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
 767                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
 768                         if (symbol_conf.vmlinux_name) {
 769                                 ui__warning("The %s file can't be used.\n%s",
 770                                             symbol_conf.vmlinux_name, msg);
 771                         } else {
 772                                 ui__warning("A vmlinux file was not found.\n%s",
 773                                             msg);
 774                         }
 775
 776                         if (use_browser <= 0)
 777                                 sleep(5);
 778                         top->vmlinux_warned = true;
 779                 }
 780         }
 781
 782         if (al.sym == NULL || !al.sym->ignore) {
 783                 struct hist_entry *he;
 784
 785                 if ((sort__has_parent || symbol_conf.use_callchain) &&
 786                     sample->callchain) {
 787                         err = machine__resolve_callchain(machine, evsel,
 788                                                          al.thread, sample,
 789                                                          &parent);
 790
 791                         if (err)
 792                                 return;
 793                 }
 794
 795                 he = perf_evsel__add_hist_entry(evsel, &al, sample);
 796                 if (he == NULL) {
 797                         pr_err("Problem incrementing symbol period, skipping event\n");
 798                         return;
 799                 }
 800
 801                 if (symbol_conf.use_callchain) {
 802                         err = callchain_append(he->callchain, &callchain_cursor,
 803                                                sample->period);
 804                         if (err)
 805                                 return;
 806                 }
 807
 808                 if (top->sort_has_symbols)
 809                         perf_top__record_precise_ip(top, he, evsel->idx, ip);
 810         }
 811
 812         return;
 813 }
 814
 815 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 816 {
 817         struct perf_sample sample;
 818         struct perf_evsel *evsel;
 819         struct perf_session *session = top->session;
 820         union perf_event *event;
 821         struct machine *machine;
 822         u8 origin;
 823         int ret;
 824
 825         while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
 826                 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
 827                 if (ret) {
 828                         pr_err("Can't parse sample, err = %d\n", ret);
 829                         continue;
 830                 }
 831
 832                 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
 833                 assert(evsel != NULL);
 834
 835                 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 836
 837                 if (event->header.type == PERF_RECORD_SAMPLE)
 838                         ++top->samples;
 839
 840                 switch (origin) {
 841                 case PERF_RECORD_MISC_USER:
 842                         ++top->us_samples;
 843                         if (top->hide_user_symbols)
 844                                 continue;
 845                         machine = perf_session__find_host_machine(session);
 846                         break;
 847                 case PERF_RECORD_MISC_KERNEL:
 848                         ++top->kernel_samples;
 849                         if (top->hide_kernel_symbols)
 850                                 continue;
 851                         machine = perf_session__find_host_machine(session);
 852                         break;
 853                 case PERF_RECORD_MISC_GUEST_KERNEL:
 854                         ++top->guest_kernel_samples;
 855                         machine = perf_session__find_machine(session, event->ip.pid);
 856                         break;
 857                 case PERF_RECORD_MISC_GUEST_USER:
 858                         ++top->guest_us_samples;
 859                         /*
 860                          * TODO: we don't process guest user from host side
 861                          * except simple counting.
 862                          */
 863                         /* Fall thru */
 864                 default:
 865                         continue;
 866                 }
 867
 868
 869                 if (event->header.type == PERF_RECORD_SAMPLE) {
 870                         perf_event__process_sample(&top->tool, event, evsel,
 871                                                    &sample, machine);
 872                 } else if (event->header.type < PERF_RECORD_MAX) {
 873                         hists__inc_nr_events(&evsel->hists, event->header.type);
 874                         perf_event__process(&top->tool, event, &sample, machine);
 875                 } else
 876                         ++session->hists.stats.nr_unknown_events;
 877         }
 878 }
 879
 880 static void perf_top__mmap_read(struct perf_top *top)
 881 {
 882         int i;
 883
 884         for (i = 0; i < top->evlist->nr_mmaps; i++)
 885                 perf_top__mmap_read_idx(top, i);
 886 }
 887
 888 static void perf_top__start_counters(struct perf_top *top)
 889 {
 890         struct perf_evsel *counter;
 891         struct perf_evlist *evlist = top->evlist;
 892
 893         if (top->group)
 894                 perf_evlist__set_leader(evlist);
 895
 896         list_for_each_entry(counter, &evlist->entries, node) {
 897                 struct perf_event_attr *attr = &counter->attr;
 898
 899                 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
 900
 901                 if (top->freq) {
 902                         attr->sample_type |= PERF_SAMPLE_PERIOD;
 903                         attr->freq        = 1;
 904                         attr->sample_freq = top->freq;
 905                 }
 906
 907                 if (evlist->nr_entries > 1) {
 908                         attr->sample_type |= PERF_SAMPLE_ID;
 909                         attr->read_format |= PERF_FORMAT_ID;
 910                 }
 911
 912                 if (perf_target__has_cpu(&top->target))
 913                         attr->sample_type |= PERF_SAMPLE_CPU;
 914
 915                 if (symbol_conf.use_callchain)
 916                         attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
 917
 918                 attr->mmap = 1;
 919                 attr->comm = 1;
 920                 attr->inherit = top->inherit;
 921 fallback_missing_features:
 922                 if (top->exclude_guest_missing)
 923                         attr->exclude_guest = attr->exclude_host = 0;
 924 retry_sample_id:
 925                 attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
 926 try_again:
 927                 if (perf_evsel__open(counter, top->evlist->cpus,
 928                                      top->evlist->threads) < 0) {
 929                         int err = errno;
 930
 931                         if (err == EPERM || err == EACCES) {
 932                                 ui__error_paranoid();
 933                                 goto out_err;
 934                         } else if (err == EINVAL) {
 935                                 if (!top->exclude_guest_missing &&
 936                                     (attr->exclude_guest || attr->exclude_host)) {
 937                                         pr_debug("Old kernel, cannot exclude "
 938                                                  "guest or host samples.\n");
 939                                         top->exclude_guest_missing = true;
 940                                         goto fallback_missing_features;
 941                                 } else if (!top->sample_id_all_missing) {
 942                                         /*
 943                                          * Old kernel, no attr->sample_id_type_all field
 944                                          */
 945                                         top->sample_id_all_missing = true;
 946                                         goto retry_sample_id;
 947                                 }
 948                         }
 949                         /*
 950                          * If it's cycles then fall back to hrtimer
 951                          * based cpu-clock-tick sw counter, which
 952                          * is always available even if no PMU support:
 953                          */
 954                         if ((err == ENOENT || err == ENXIO) &&
 955                             (attr->type == PERF_TYPE_HARDWARE) &&
 956                             (attr->config == PERF_COUNT_HW_CPU_CYCLES)) {
 957
 958                                 if (verbose)
 959                                         ui__warning("Cycles event not supported,\n"
 960                                                     "trying to fall back to cpu-clock-ticks\n");
 961
 962                                 attr->type = PERF_TYPE_SOFTWARE;
 963                                 attr->config = PERF_COUNT_SW_CPU_CLOCK;
 964                                 if (counter->name) {
 965                                         free(counter->name);
 966                                         counter->name = NULL;
 967                                 }
 968                                 goto try_again;
 969                         }
 970
 971                         if (err == ENOENT) {
 972                                 ui__error("The %s event is not supported.\n",
 973                                           perf_evsel__name(counter));
 974                                 goto out_err;
 975                         } else if (err == EMFILE) {
 976                                 ui__error("Too many events are opened.\n"
 977                                             "Try again after reducing the number of events\n");
 978                                 goto out_err;
 979                         }
 980
 981                         ui__error("The sys_perf_event_open() syscall "
 982                                     "returned with %d (%s).  /bin/dmesg "
 983                                     "may provide additional information.\n"
 984                                     "No CONFIG_PERF_EVENTS=y kernel support "
 985                                     "configured?\n", err, strerror(err));
 986                         goto out_err;
 987                 }
 988         }
 989
 990         if (perf_evlist__mmap(evlist, top->mmap_pages, false) < 0) {
 991                 ui__error("Failed to mmap with %d (%s)\n",
 992                             errno, strerror(errno));
 993                 goto out_err;
 994         }
 995
 996         return;
 997
 998 out_err:
 999         exit_browser(0);
1000         exit(0);
1001 }
1002
1003 static int perf_top__setup_sample_type(struct perf_top *top)
1004 {
1005         if (!top->sort_has_symbols) {
1006                 if (symbol_conf.use_callchain) {
1007                         ui__error("Selected -g but \"sym\" not present in --sort/-s.");
1008                         return -EINVAL;
1009                 }
1010         } else if (!top->dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
1011                 if (callchain_register_param(&callchain_param) < 0) {
1012                         ui__error("Can't register callchain params.\n");
1013                         return -EINVAL;
1014                 }
1015         }
1016
1017         return 0;
1018 }
1019
1020 static int __cmd_top(struct perf_top *top)
1021 {
1022         pthread_t thread;
1023         int ret;
1024         /*
1025          * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1026          * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1027          */
1028         top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1029         if (top->session == NULL)
1030                 return -ENOMEM;
1031
1032         ret = perf_top__setup_sample_type(top);
1033         if (ret)
1034                 goto out_delete;
1035
1036         if (perf_target__has_task(&top->target))
1037                 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
1038                                                   perf_event__process,
1039                                                   &top->session->host_machine);
1040         else
1041                 perf_event__synthesize_threads(&top->tool, perf_event__process,
1042                                                &top->session->host_machine);
1043         perf_top__start_counters(top);
1044         top->session->evlist = top->evlist;
1045         perf_session__set_id_hdr_size(top->session);
1046
1047         /* Wait for a minimal set of events before starting the snapshot */
1048         poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1049
1050         perf_top__mmap_read(top);
1051
1052         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1053                                                             display_thread), top)) {
1054                 ui__error("Could not create display thread.\n");
1055                 exit(-1);
1056         }
1057
1058         if (top->realtime_prio) {
1059                 struct sched_param param;
1060
1061                 param.sched_priority = top->realtime_prio;
1062                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1063                         ui__error("Could not set realtime priority.\n");
1064                         exit(-1);
1065                 }
1066         }
1067
1068         while (1) {
1069                 u64 hits = top->samples;
1070
1071                 perf_top__mmap_read(top);
1072
1073                 if (hits == top->samples)
1074                         ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1075         }
1076
1077 out_delete:
1078         perf_session__delete(top->session);
1079         top->session = NULL;
1080
1081         return 0;
1082 }
1083
1084 static int
1085 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1086 {
1087         struct perf_top *top = (struct perf_top *)opt->value;
1088         char *tok, *tok2;
1089         char *endptr;
1090
1091         /*
1092          * --no-call-graph
1093          */
1094         if (unset) {
1095                 top->dont_use_callchains = true;
1096                 return 0;
1097         }
1098
1099         symbol_conf.use_callchain = true;
1100
1101         if (!arg)
1102                 return 0;
1103
1104         tok = strtok((char *)arg, ",");
1105         if (!tok)
1106                 return -1;
1107
1108         /* get the output mode */
1109         if (!strncmp(tok, "graph", strlen(arg)))
1110                 callchain_param.mode = CHAIN_GRAPH_ABS;
1111
1112         else if (!strncmp(tok, "flat", strlen(arg)))
1113                 callchain_param.mode = CHAIN_FLAT;
1114
1115         else if (!strncmp(tok, "fractal", strlen(arg)))
1116                 callchain_param.mode = CHAIN_GRAPH_REL;
1117
1118         else if (!strncmp(tok, "none", strlen(arg))) {
1119                 callchain_param.mode = CHAIN_NONE;
1120                 symbol_conf.use_callchain = false;
1121
1122                 return 0;
1123         } else
1124                 return -1;
1125
1126         /* get the min percentage */
1127         tok = strtok(NULL, ",");
1128         if (!tok)
1129                 goto setup;
1130
1131         callchain_param.min_percent = strtod(tok, &endptr);
1132         if (tok == endptr)
1133                 return -1;
1134
1135         /* get the print limit */
1136         tok2 = strtok(NULL, ",");
1137         if (!tok2)
1138                 goto setup;
1139
1140         if (tok2[0] != 'c') {
1141                 callchain_param.print_limit = strtod(tok2, &endptr);
1142                 tok2 = strtok(NULL, ",");
1143                 if (!tok2)
1144                         goto setup;
1145         }
1146
1147         /* get the call chain order */
1148         if (!strcmp(tok2, "caller"))
1149                 callchain_param.order = ORDER_CALLER;
1150         else if (!strcmp(tok2, "callee"))
1151                 callchain_param.order = ORDER_CALLEE;
1152         else
1153                 return -1;
1154 setup:
1155         if (callchain_register_param(&callchain_param) < 0) {
1156                 fprintf(stderr, "Can't register callchain params\n");
1157                 return -1;
1158         }
1159         return 0;
1160 }
1161
1162 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1163 {
1164         struct perf_evsel *pos;
1165         int status;
1166         char errbuf[BUFSIZ];
1167         struct perf_top top = {
1168                 .count_filter        = 5,
1169                 .delay_secs          = 2,
1170                 .freq                = 4000, /* 4 KHz */
1171                 .mmap_pages          = 128,
1172                 .sym_pcnt_filter     = 5,
1173                 .target              = {
1174                         .uses_mmap   = true,
1175                 },
1176         };
1177         char callchain_default_opt[] = "fractal,0.5,callee";
1178         const struct option options[] = {
1179         OPT_CALLBACK('e', "event", &top.evlist, "event",
1180                      "event selector. use 'perf list' to list available events",
1181                      parse_events_option),
1182         OPT_INTEGER('c', "count", &top.default_interval,
1183                     "event period to sample"),
1184         OPT_STRING('p', "pid", &top.target.pid, "pid",
1185                     "profile events on existing process id"),
1186         OPT_STRING('t', "tid", &top.target.tid, "tid",
1187                     "profile events on existing thread id"),
1188         OPT_BOOLEAN('a', "all-cpus", &top.target.system_wide,
1189                             "system-wide collection from all CPUs"),
1190         OPT_STRING('C', "cpu", &top.target.cpu_list, "cpu",
1191                     "list of cpus to monitor"),
1192         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1193                    "file", "vmlinux pathname"),
1194         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1195                     "hide kernel symbols"),
1196         OPT_UINTEGER('m', "mmap-pages", &top.mmap_pages, "number of mmap data pages"),
1197         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1198                     "collect data with this RT SCHED_FIFO priority"),
1199         OPT_INTEGER('d', "delay", &top.delay_secs,
1200                     "number of seconds to delay between refreshes"),
1201         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1202                             "dump the symbol table used for profiling"),
1203         OPT_INTEGER('f', "count-filter", &top.count_filter,
1204                     "only display functions with more events than this"),
1205         OPT_BOOLEAN('g', "group", &top.group,
1206                             "put the counters into a counter group"),
1207         OPT_BOOLEAN('i', "inherit", &top.inherit,
1208                     "child tasks inherit counters"),
1209         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1210                     "symbol to annotate"),
1211         OPT_BOOLEAN('z', "zero", &top.zero,
1212                     "zero history across updates"),
1213         OPT_INTEGER('F', "freq", &top.freq,
1214                     "profile at this frequency"),
1215         OPT_INTEGER('E', "entries", &top.print_entries,
1216                     "display this many functions"),
1217         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1218                     "hide user symbols"),
1219         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1220         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1221         OPT_INCR('v', "verbose", &verbose,
1222                     "be more verbose (show counter open errors, etc)"),
1223         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1224                    "sort by key(s): pid, comm, dso, symbol, parent"),
1225         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1226                     "Show a column with the number of samples"),
1227         OPT_CALLBACK_DEFAULT('G', "call-graph", &top, "output_type,min_percent, call_order",
1228                      "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1229                      "Default: fractal,0.5,callee", &parse_callchain_opt,
1230                      callchain_default_opt),
1231         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1232                     "Show a column with the sum of periods"),
1233         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1234                    "only consider symbols in these dsos"),
1235         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1236                    "only consider symbols in these comms"),
1237         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1238                    "only consider these symbols"),
1239         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1240                     "Interleave source code with assembly code (default)"),
1241         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1242                     "Display raw encoding of assembly instructions (default)"),
1243         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1244                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1245         OPT_STRING('u', "uid", &top.target.uid_str, "user", "user to profile"),
1246         OPT_END()
1247         };
1248         const char * const top_usage[] = {
1249                 "perf top [<options>]",
1250                 NULL
1251         };
1252
1253         top.evlist = perf_evlist__new(NULL, NULL);
1254         if (top.evlist == NULL)
1255                 return -ENOMEM;
1256
1257         symbol_conf.exclude_other = false;
1258
1259         argc = parse_options(argc, argv, options, top_usage, 0);
1260         if (argc)
1261                 usage_with_options(top_usage, options);
1262
1263         if (sort_order == default_sort_order)
1264                 sort_order = "dso,symbol";
1265
1266         setup_sorting(top_usage, options);
1267
1268         if (top.use_stdio)
1269                 use_browser = 0;
1270         else if (top.use_tui)
1271                 use_browser = 1;
1272
1273         setup_browser(false);
1274
1275         status = perf_target__validate(&top.target);
1276         if (status) {
1277                 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1278                 ui__warning("%s", errbuf);
1279         }
1280
1281         status = perf_target__parse_uid(&top.target);
1282         if (status) {
1283                 int saved_errno = errno;
1284
1285                 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1286                 ui__error("%s", errbuf);
1287
1288                 status = -saved_errno;
1289                 goto out_delete_evlist;
1290         }
1291
1292         if (perf_target__none(&top.target))
1293                 top.target.system_wide = true;
1294
1295         if (perf_evlist__create_maps(top.evlist, &top.target) < 0)
1296                 usage_with_options(top_usage, options);
1297
1298         if (!top.evlist->nr_entries &&
1299             perf_evlist__add_default(top.evlist) < 0) {
1300                 ui__error("Not enough memory for event selector list\n");
1301                 return -ENOMEM;
1302         }
1303
1304         symbol_conf.nr_events = top.evlist->nr_entries;
1305
1306         if (top.delay_secs < 1)
1307                 top.delay_secs = 1;
1308
1309         /*
1310          * User specified count overrides default frequency.
1311          */
1312         if (top.default_interval)
1313                 top.freq = 0;
1314         else if (top.freq) {
1315                 top.default_interval = top.freq;
1316         } else {
1317                 ui__error("frequency and count are zero, aborting\n");
1318                 exit(EXIT_FAILURE);
1319         }
1320
1321         list_for_each_entry(pos, &top.evlist->entries, node) {
1322                 /*
1323                  * Fill in the ones not specifically initialized via -c:
1324                  */
1325                 if (!pos->attr.sample_period)
1326                         pos->attr.sample_period = top.default_interval;
1327         }
1328
1329         top.sym_evsel = perf_evlist__first(top.evlist);
1330
1331         symbol_conf.priv_size = sizeof(struct annotation);
1332
1333         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1334         if (symbol__init() < 0)
1335                 return -1;
1336
1337         sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1338         sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1339         sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1340
1341         /*
1342          * Avoid annotation data structures overhead when symbols aren't on the
1343          * sort list.
1344          */
1345         top.sort_has_symbols = sort_sym.list.next != NULL;
1346
1347         get_term_dimensions(&top.winsize);
1348         if (top.print_entries == 0) {
1349                 struct sigaction act = {
1350                         .sa_sigaction = perf_top__sig_winch,
1351                         .sa_flags     = SA_SIGINFO,
1352                 };
1353                 perf_top__update_print_entries(&top);
1354                 sigaction(SIGWINCH, &act, NULL);
1355         }
1356
1357         status = __cmd_top(&top);
1358
1359 out_delete_evlist:
1360         perf_evlist__delete(top.evlist);
1361
1362         return status;
1363 }