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/machine.h"
  30 #include "util/session.h"
  31 #include "util/symbol.h"
  32 #include "util/thread.h"
  33 #include "util/thread_map.h"
  34 #include "util/top.h"
  35 #include "util/util.h"
  36 #include <linux/rbtree.h>
  37 #include <subcmd/parse-options.h>
  38 #include "util/parse-events.h"
  39 #include "util/cpumap.h"
  40 #include "util/xyarray.h"
  41 #include "util/sort.h"
  42 #include "util/intlist.h"
  43 #include "util/parse-branch-options.h"
  44 #include "arch/common.h"
  45
  46 #include "util/debug.h"
  47
  48 #include <assert.h>
  49 #include <elf.h>
  50 #include <fcntl.h>
  51
  52 #include <stdio.h>
  53 #include <termios.h>
  54 #include <unistd.h>
  55 #include <inttypes.h>
  56
  57 #include <errno.h>
  58 #include <time.h>
  59 #include <sched.h>
  60
  61 #include <sys/syscall.h>
  62 #include <sys/ioctl.h>
  63 #include <poll.h>
  64 #include <sys/prctl.h>
  65 #include <sys/wait.h>
  66 #include <sys/uio.h>
  67 #include <sys/utsname.h>
  68 #include <sys/mman.h>
  69
  70 #include <linux/types.h>
  71
  72 static volatile int done;
  73
  74 #define HEADER_LINE_NR  5
  75
  76 static void perf_top__update_print_entries(struct perf_top *top)
  77 {
  78         top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
  79 }
  80
  81 static void perf_top__sig_winch(int sig __maybe_unused,
  82                                 siginfo_t *info __maybe_unused, void *arg)
  83 {
  84         struct perf_top *top = arg;
  85
  86         get_term_dimensions(&top->winsize);
  87         perf_top__update_print_entries(top);
  88 }
  89
  90 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
  91 {
  92         struct symbol *sym;
  93         struct annotation *notes;
  94         struct map *map;
  95         int err = -1;
  96
  97         if (!he || !he->ms.sym)
  98                 return -1;
  99
 100         sym = he->ms.sym;
 101         map = he->ms.map;
 102
 103         /*
 104          * We can't annotate with just /proc/kallsyms
 105          */
 106         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
 107             !dso__is_kcore(map->dso)) {
 108                 pr_err("Can't annotate %s: No vmlinux file was found in the "
 109                        "path\n", sym->name);
 110                 sleep(1);
 111                 return -1;
 112         }
 113
 114         notes = symbol__annotation(sym);
 115         if (notes->src != NULL) {
 116                 pthread_mutex_lock(&notes->lock);
 117                 goto out_assign;
 118         }
 119
 120         pthread_mutex_lock(&notes->lock);
 121
 122         if (symbol__alloc_hist(sym) < 0) {
 123                 pthread_mutex_unlock(&notes->lock);
 124                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 125                        sym->name);
 126                 sleep(1);
 127                 return err;
 128         }
 129
 130         err = symbol__annotate(sym, map, 0);
 131         if (err == 0) {
 132 out_assign:
 133                 top->sym_filter_entry = he;
 134         }
 135
 136         pthread_mutex_unlock(&notes->lock);
 137         return err;
 138 }
 139
 140 static void __zero_source_counters(struct hist_entry *he)
 141 {
 142         struct symbol *sym = he->ms.sym;
 143         symbol__annotate_zero_histograms(sym);
 144 }
 145
 146 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
 147 {
 148         struct utsname uts;
 149         int err = uname(&uts);
 150
 151         ui__warning("Out of bounds address found:\n\n"
 152                     "Addr:   %" PRIx64 "\n"
 153                     "DSO:    %s %c\n"
 154                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
 155                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
 156                     "Arch:   %s\n"
 157                     "Kernel: %s\n"
 158                     "Tools:  %s\n\n"
 159                     "Not all samples will be on the annotation output.\n\n"
 160                     "Please report to linux-kernel@vger.kernel.org\n",
 161                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
 162                     map->start, map->end, sym->start, sym->end,
 163                     sym->binding == STB_GLOBAL ? 'g' :
 164                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
 165                     err ? "[unknown]" : uts.machine,
 166                     err ? "[unknown]" : uts.release, perf_version_string);
 167         if (use_browser <= 0)
 168                 sleep(5);
 169
 170         map->erange_warned = true;
 171 }
 172
 173 static void perf_top__record_precise_ip(struct perf_top *top,
 174                                         struct hist_entry *he,
 175                                         int counter, u64 ip)
 176 {
 177         struct annotation *notes;
 178         struct symbol *sym = he->ms.sym;
 179         int err = 0;
 180
 181         if (sym == NULL || (use_browser == 0 &&
 182                             (top->sym_filter_entry == NULL ||
 183                              top->sym_filter_entry->ms.sym != sym)))
 184                 return;
 185
 186         notes = symbol__annotation(sym);
 187
 188         if (pthread_mutex_trylock(&notes->lock))
 189                 return;
 190
 191         err = hist_entry__inc_addr_samples(he, counter, ip);
 192
 193         pthread_mutex_unlock(&notes->lock);
 194
 195         if (unlikely(err)) {
 196                 /*
 197                  * This function is now called with he->hists->lock held.
 198                  * Release it before going to sleep.
 199                  */
 200                 pthread_mutex_unlock(&he->hists->lock);
 201
 202                 if (err == -ERANGE && !he->ms.map->erange_warned)
 203                         ui__warn_map_erange(he->ms.map, sym, ip);
 204                 else if (err == -ENOMEM) {
 205                         pr_err("Not enough memory for annotating '%s' symbol!\n",
 206                                sym->name);
 207                         sleep(1);
 208                 }
 209
 210                 pthread_mutex_lock(&he->hists->lock);
 211         }
 212 }
 213
 214 static void perf_top__show_details(struct perf_top *top)
 215 {
 216         struct hist_entry *he = top->sym_filter_entry;
 217         struct annotation *notes;
 218         struct symbol *symbol;
 219         int more;
 220
 221         if (!he)
 222                 return;
 223
 224         symbol = he->ms.sym;
 225         notes = symbol__annotation(symbol);
 226
 227         pthread_mutex_lock(&notes->lock);
 228
 229         if (notes->src == NULL)
 230                 goto out_unlock;
 231
 232         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
 233         printf("  Events  Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
 234
 235         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
 236                                        0, top->sym_pcnt_filter, top->print_entries, 4);
 237
 238         if (top->evlist->enabled) {
 239                 if (top->zero)
 240                         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
 241                 else
 242                         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
 243         }
 244         if (more != 0)
 245                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 246 out_unlock:
 247         pthread_mutex_unlock(&notes->lock);
 248 }
 249
 250 static void perf_top__print_sym_table(struct perf_top *top)
 251 {
 252         char bf[160];
 253         int printed = 0;
 254         const int win_width = top->winsize.ws_col - 1;
 255         struct perf_evsel *evsel = top->sym_evsel;
 256         struct hists *hists = evsel__hists(evsel);
 257
 258         puts(CONSOLE_CLEAR);
 259
 260         perf_top__header_snprintf(top, bf, sizeof(bf));
 261         printf("%s\n", bf);
 262
 263         perf_top__reset_sample_counters(top);
 264
 265         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 266
 267         if (hists->stats.nr_lost_warned !=
 268             hists->stats.nr_events[PERF_RECORD_LOST]) {
 269                 hists->stats.nr_lost_warned =
 270                               hists->stats.nr_events[PERF_RECORD_LOST];
 271                 color_fprintf(stdout, PERF_COLOR_RED,
 272                               "WARNING: LOST %d chunks, Check IO/CPU overload",
 273                               hists->stats.nr_lost_warned);
 274                 ++printed;
 275         }
 276
 277         if (top->sym_filter_entry) {
 278                 perf_top__show_details(top);
 279                 return;
 280         }
 281
 282         if (top->evlist->enabled) {
 283                 if (top->zero) {
 284                         hists__delete_entries(hists);
 285                 } else {
 286                         hists__decay_entries(hists, top->hide_user_symbols,
 287                                              top->hide_kernel_symbols);
 288                 }
 289         }
 290
 291         hists__collapse_resort(hists, NULL);
 292         perf_evsel__output_resort(evsel, NULL);
 293
 294         hists__output_recalc_col_len(hists, top->print_entries - printed);
 295         putchar('\n');
 296         hists__fprintf(hists, false, top->print_entries - printed, win_width,
 297                        top->min_percent, stdout);
 298 }
 299
 300 static void prompt_integer(int *target, const char *msg)
 301 {
 302         char *buf = malloc(0), *p;
 303         size_t dummy = 0;
 304         int tmp;
 305
 306         fprintf(stdout, "\n%s: ", msg);
 307         if (getline(&buf, &dummy, stdin) < 0)
 308                 return;
 309
 310         p = strchr(buf, '\n');
 311         if (p)
 312                 *p = 0;
 313
 314         p = buf;
 315         while(*p) {
 316                 if (!isdigit(*p))
 317                         goto out_free;
 318                 p++;
 319         }
 320         tmp = strtoul(buf, NULL, 10);
 321         *target = tmp;
 322 out_free:
 323         free(buf);
 324 }
 325
 326 static void prompt_percent(int *target, const char *msg)
 327 {
 328         int tmp = 0;
 329
 330         prompt_integer(&tmp, msg);
 331         if (tmp >= 0 && tmp <= 100)
 332                 *target = tmp;
 333 }
 334
 335 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 336 {
 337         char *buf = malloc(0), *p;
 338         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 339         struct hists *hists = evsel__hists(top->sym_evsel);
 340         struct rb_node *next;
 341         size_t dummy = 0;
 342
 343         /* zero counters of active symbol */
 344         if (syme) {
 345                 __zero_source_counters(syme);
 346                 top->sym_filter_entry = NULL;
 347         }
 348
 349         fprintf(stdout, "\n%s: ", msg);
 350         if (getline(&buf, &dummy, stdin) < 0)
 351                 goto out_free;
 352
 353         p = strchr(buf, '\n');
 354         if (p)
 355                 *p = 0;
 356
 357         next = rb_first(&hists->entries);
 358         while (next) {
 359                 n = rb_entry(next, struct hist_entry, rb_node);
 360                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
 361                         found = n;
 362                         break;
 363                 }
 364                 next = rb_next(&n->rb_node);
 365         }
 366
 367         if (!found) {
 368                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 369                 sleep(1);
 370         } else
 371                 perf_top__parse_source(top, found);
 372
 373 out_free:
 374         free(buf);
 375 }
 376
 377 static void perf_top__print_mapped_keys(struct perf_top *top)
 378 {
 379         char *name = NULL;
 380
 381         if (top->sym_filter_entry) {
 382                 struct symbol *sym = top->sym_filter_entry->ms.sym;
 383                 name = sym->name;
 384         }
 385
 386         fprintf(stdout, "\nMapped keys:\n");
 387         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
 388         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
 389
 390         if (top->evlist->nr_entries > 1)
 391                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
 392
 393         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
 394
 395         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
 396         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 397         fprintf(stdout, "\t[S]     stop annotation.\n");
 398
 399         fprintf(stdout,
 400                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 401                 top->hide_kernel_symbols ? "yes" : "no");
 402         fprintf(stdout,
 403                 "\t[U]     hide user symbols.               \t(%s)\n",
 404                 top->hide_user_symbols ? "yes" : "no");
 405         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
 406         fprintf(stdout, "\t[qQ]    quit.\n");
 407 }
 408
 409 static int perf_top__key_mapped(struct perf_top *top, int c)
 410 {
 411         switch (c) {
 412                 case 'd':
 413                 case 'e':
 414                 case 'f':
 415                 case 'z':
 416                 case 'q':
 417                 case 'Q':
 418                 case 'K':
 419                 case 'U':
 420                 case 'F':
 421                 case 's':
 422                 case 'S':
 423                         return 1;
 424                 case 'E':
 425                         return top->evlist->nr_entries > 1 ? 1 : 0;
 426                 default:
 427                         break;
 428         }
 429
 430         return 0;
 431 }
 432
 433 static bool perf_top__handle_keypress(struct perf_top *top, int c)
 434 {
 435         bool ret = true;
 436
 437         if (!perf_top__key_mapped(top, c)) {
 438                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 439                 struct termios save;
 440
 441                 perf_top__print_mapped_keys(top);
 442                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 443                 fflush(stdout);
 444
 445                 set_term_quiet_input(&save);
 446
 447                 poll(&stdin_poll, 1, -1);
 448                 c = getc(stdin);
 449
 450                 tcsetattr(0, TCSAFLUSH, &save);
 451                 if (!perf_top__key_mapped(top, c))
 452                         return ret;
 453         }
 454
 455         switch (c) {
 456                 case 'd':
 457                         prompt_integer(&top->delay_secs, "Enter display delay");
 458                         if (top->delay_secs < 1)
 459                                 top->delay_secs = 1;
 460                         break;
 461                 case 'e':
 462                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
 463                         if (top->print_entries == 0) {
 464                                 struct sigaction act = {
 465                                         .sa_sigaction = perf_top__sig_winch,
 466                                         .sa_flags     = SA_SIGINFO,
 467                                 };
 468                                 perf_top__sig_winch(SIGWINCH, NULL, top);
 469                                 sigaction(SIGWINCH, &act, NULL);
 470                         } else {
 471                                 signal(SIGWINCH, SIG_DFL);
 472                         }
 473                         break;
 474                 case 'E':
 475                         if (top->evlist->nr_entries > 1) {
 476                                 /* Select 0 as the default event: */
 477                                 int counter = 0;
 478
 479                                 fprintf(stderr, "\nAvailable events:");
 480
 481                                 evlist__for_each(top->evlist, top->sym_evsel)
 482                                         fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
 483
 484                                 prompt_integer(&counter, "Enter details event counter");
 485
 486                                 if (counter >= top->evlist->nr_entries) {
 487                                         top->sym_evsel = perf_evlist__first(top->evlist);
 488                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
 489                                         sleep(1);
 490                                         break;
 491                                 }
 492                                 evlist__for_each(top->evlist, top->sym_evsel)
 493                                         if (top->sym_evsel->idx == counter)
 494                                                 break;
 495                         } else
 496                                 top->sym_evsel = perf_evlist__first(top->evlist);
 497                         break;
 498                 case 'f':
 499                         prompt_integer(&top->count_filter, "Enter display event count filter");
 500                         break;
 501                 case 'F':
 502                         prompt_percent(&top->sym_pcnt_filter,
 503                                        "Enter details display event filter (percent)");
 504                         break;
 505                 case 'K':
 506                         top->hide_kernel_symbols = !top->hide_kernel_symbols;
 507                         break;
 508                 case 'q':
 509                 case 'Q':
 510                         printf("exiting.\n");
 511                         if (top->dump_symtab)
 512                                 perf_session__fprintf_dsos(top->session, stderr);
 513                         ret = false;
 514                         break;
 515                 case 's':
 516                         perf_top__prompt_symbol(top, "Enter details symbol");
 517                         break;
 518                 case 'S':
 519                         if (!top->sym_filter_entry)
 520                                 break;
 521                         else {
 522                                 struct hist_entry *syme = top->sym_filter_entry;
 523
 524                                 top->sym_filter_entry = NULL;
 525                                 __zero_source_counters(syme);
 526                         }
 527                         break;
 528                 case 'U':
 529                         top->hide_user_symbols = !top->hide_user_symbols;
 530                         break;
 531                 case 'z':
 532                         top->zero = !top->zero;
 533                         break;
 534                 default:
 535                         break;
 536         }
 537
 538         return ret;
 539 }
 540
 541 static void perf_top__sort_new_samples(void *arg)
 542 {
 543         struct perf_top *t = arg;
 544         struct perf_evsel *evsel = t->sym_evsel;
 545         struct hists *hists;
 546
 547         perf_top__reset_sample_counters(t);
 548
 549         if (t->evlist->selected != NULL)
 550                 t->sym_evsel = t->evlist->selected;
 551
 552         hists = evsel__hists(evsel);
 553
 554         if (t->evlist->enabled) {
 555                 if (t->zero) {
 556                         hists__delete_entries(hists);
 557                 } else {
 558                         hists__decay_entries(hists, t->hide_user_symbols,
 559                                              t->hide_kernel_symbols);
 560                 }
 561         }
 562
 563         hists__collapse_resort(hists, NULL);
 564         perf_evsel__output_resort(evsel, NULL);
 565 }
 566
 567 static void *display_thread_tui(void *arg)
 568 {
 569         struct perf_evsel *pos;
 570         struct perf_top *top = arg;
 571         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
 572         struct hist_browser_timer hbt = {
 573                 .timer          = perf_top__sort_new_samples,
 574                 .arg            = top,
 575                 .refresh        = top->delay_secs,
 576         };
 577
 578         perf_top__sort_new_samples(top);
 579
 580         /*
 581          * Initialize the uid_filter_str, in the future the TUI will allow
 582          * Zooming in/out UIDs. For now juse use whatever the user passed
 583          * via --uid.
 584          */
 585         evlist__for_each(top->evlist, pos) {
 586                 struct hists *hists = evsel__hists(pos);
 587                 hists->uid_filter_str = top->record_opts.target.uid_str;
 588         }
 589
 590         perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
 591                                       top->min_percent,
 592                                       &top->session->header.env);
 593
 594         done = 1;
 595         return NULL;
 596 }
 597
 598 static void display_sig(int sig __maybe_unused)
 599 {
 600         done = 1;
 601 }
 602
 603 static void display_setup_sig(void)
 604 {
 605         signal(SIGSEGV, sighandler_dump_stack);
 606         signal(SIGFPE, sighandler_dump_stack);
 607         signal(SIGINT,  display_sig);
 608         signal(SIGQUIT, display_sig);
 609         signal(SIGTERM, display_sig);
 610 }
 611
 612 static void *display_thread(void *arg)
 613 {
 614         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 615         struct termios save;
 616         struct perf_top *top = arg;
 617         int delay_msecs, c;
 618
 619         display_setup_sig();
 620         pthread__unblock_sigwinch();
 621 repeat:
 622         delay_msecs = top->delay_secs * 1000;
 623         set_term_quiet_input(&save);
 624         /* trash return*/
 625         getc(stdin);
 626
 627         while (!done) {
 628                 perf_top__print_sym_table(top);
 629                 /*
 630                  * Either timeout expired or we got an EINTR due to SIGWINCH,
 631                  * refresh screen in both cases.
 632                  */
 633                 switch (poll(&stdin_poll, 1, delay_msecs)) {
 634                 case 0:
 635                         continue;
 636                 case -1:
 637                         if (errno == EINTR)
 638                                 continue;
 639                         /* Fall trhu */
 640                 default:
 641                         c = getc(stdin);
 642                         tcsetattr(0, TCSAFLUSH, &save);
 643
 644                         if (perf_top__handle_keypress(top, c))
 645                                 goto repeat;
 646                         done = 1;
 647                 }
 648         }
 649
 650         tcsetattr(0, TCSAFLUSH, &save);
 651         return NULL;
 652 }
 653
 654 static int symbol_filter(struct map *map, struct symbol *sym)
 655 {
 656         const char *name = sym->name;
 657
 658         if (!__map__is_kernel(map))
 659                 return 0;
 660         /*
 661          * ppc64 uses function descriptors and appends a '.' to the
 662          * start of every instruction address. Remove it.
 663          */
 664         if (name[0] == '.')
 665                 name++;
 666
 667         if (!strcmp(name, "_text") ||
 668             !strcmp(name, "_etext") ||
 669             !strcmp(name, "_sinittext") ||
 670             !strncmp("init_module", name, 11) ||
 671             !strncmp("cleanup_module", name, 14) ||
 672             strstr(name, "_text_start") ||
 673             strstr(name, "_text_end"))
 674                 return 1;
 675
 676         if (symbol__is_idle(sym))
 677                 sym->ignore = true;
 678
 679         return 0;
 680 }
 681
 682 static int hist_iter__top_callback(struct hist_entry_iter *iter,
 683                                    struct addr_location *al, bool single,
 684                                    void *arg)
 685 {
 686         struct perf_top *top = arg;
 687         struct hist_entry *he = iter->he;
 688         struct perf_evsel *evsel = iter->evsel;
 689
 690         if (sort__has_sym && single)
 691                 perf_top__record_precise_ip(top, he, evsel->idx, al->addr);
 692
 693         hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
 694                      !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
 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 addr_location al;
 706         int err;
 707
 708         if (!machine && perf_guest) {
 709                 static struct intlist *seen;
 710
 711                 if (!seen)
 712                         seen = intlist__new(NULL);
 713
 714                 if (!intlist__has_entry(seen, sample->pid)) {
 715                         pr_err("Can't find guest [%d]'s kernel information\n",
 716                                 sample->pid);
 717                         intlist__add(seen, sample->pid);
 718                 }
 719                 return;
 720         }
 721
 722         if (!machine) {
 723                 pr_err("%u unprocessable samples recorded.\r",
 724                        top->session->evlist->stats.nr_unprocessable_samples++);
 725                 return;
 726         }
 727
 728         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
 729                 top->exact_samples++;
 730
 731         if (perf_event__preprocess_sample(event, machine, &al, sample) < 0)
 732                 return;
 733
 734         if (!top->kptr_restrict_warned &&
 735             symbol_conf.kptr_restrict &&
 736             al.cpumode == PERF_RECORD_MISC_KERNEL) {
 737                 ui__warning(
 738 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 739 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 740 "Kernel%s samples will not be resolved.\n",
 741                           al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
 742                           " modules" : "");
 743                 if (use_browser <= 0)
 744                         sleep(5);
 745                 top->kptr_restrict_warned = true;
 746         }
 747
 748         if (al.sym == NULL) {
 749                 const char *msg = "Kernel samples will not be resolved.\n";
 750                 /*
 751                  * As we do lazy loading of symtabs we only will know if the
 752                  * specified vmlinux file is invalid when we actually have a
 753                  * hit in kernel space and then try to load it. So if we get
 754                  * here and there are _no_ symbols in the DSO backing the
 755                  * kernel map, bail out.
 756                  *
 757                  * We may never get here, for instance, if we use -K/
 758                  * --hide-kernel-symbols, even if the user specifies an
 759                  * invalid --vmlinux ;-)
 760                  */
 761                 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
 762                     al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
 763                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
 764                         if (symbol_conf.vmlinux_name) {
 765                                 char serr[256];
 766                                 dso__strerror_load(al.map->dso, serr, sizeof(serr));
 767                                 ui__warning("The %s file can't be used: %s\n%s",
 768                                             symbol_conf.vmlinux_name, serr, msg);
 769                         } else {
 770                                 ui__warning("A vmlinux file was not found.\n%s",
 771                                             msg);
 772                         }
 773
 774                         if (use_browser <= 0)
 775                                 sleep(5);
 776                         top->vmlinux_warned = true;
 777                 }
 778         }
 779
 780         if (al.sym == NULL || !al.sym->ignore) {
 781                 struct hists *hists = evsel__hists(evsel);
 782                 struct hist_entry_iter iter = {
 783                         .evsel          = evsel,
 784                         .sample         = sample,
 785                         .add_entry_cb   = hist_iter__top_callback,
 786                 };
 787
 788                 if (symbol_conf.cumulate_callchain)
 789                         iter.ops = &hist_iter_cumulative;
 790                 else
 791                         iter.ops = &hist_iter_normal;
 792
 793                 pthread_mutex_lock(&hists->lock);
 794
 795                 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
 796                 if (err < 0)
 797                         pr_err("Problem incrementing symbol period, skipping event\n");
 798
 799                 pthread_mutex_unlock(&hists->lock);
 800         }
 801
 802         addr_location__put(&al);
 803 }
 804
 805 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 806 {
 807         struct perf_sample sample;
 808         struct perf_evsel *evsel;
 809         struct perf_session *session = top->session;
 810         union perf_event *event;
 811         struct machine *machine;
 812         u8 origin;
 813         int ret;
 814
 815         while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
 816                 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
 817                 if (ret) {
 818                         pr_err("Can't parse sample, err = %d\n", ret);
 819                         goto next_event;
 820                 }
 821
 822                 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
 823                 assert(evsel != NULL);
 824
 825                 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
 826
 827                 if (event->header.type == PERF_RECORD_SAMPLE)
 828                         ++top->samples;
 829
 830                 switch (origin) {
 831                 case PERF_RECORD_MISC_USER:
 832                         ++top->us_samples;
 833                         if (top->hide_user_symbols)
 834                                 goto next_event;
 835                         machine = &session->machines.host;
 836                         break;
 837                 case PERF_RECORD_MISC_KERNEL:
 838                         ++top->kernel_samples;
 839                         if (top->hide_kernel_symbols)
 840                                 goto next_event;
 841                         machine = &session->machines.host;
 842                         break;
 843                 case PERF_RECORD_MISC_GUEST_KERNEL:
 844                         ++top->guest_kernel_samples;
 845                         machine = perf_session__find_machine(session,
 846                                                              sample.pid);
 847                         break;
 848                 case PERF_RECORD_MISC_GUEST_USER:
 849                         ++top->guest_us_samples;
 850                         /*
 851                          * TODO: we don't process guest user from host side
 852                          * except simple counting.
 853                          */
 854                         goto next_event;
 855                 default:
 856                         if (event->header.type == PERF_RECORD_SAMPLE)
 857                                 goto next_event;
 858                         machine = &session->machines.host;
 859                         break;
 860                 }
 861
 862
 863                 if (event->header.type == PERF_RECORD_SAMPLE) {
 864                         perf_event__process_sample(&top->tool, event, evsel,
 865                                                    &sample, machine);
 866                 } else if (event->header.type < PERF_RECORD_MAX) {
 867                         hists__inc_nr_events(evsel__hists(evsel), event->header.type);
 868                         machine__process_event(machine, event, &sample);
 869                 } else
 870                         ++session->evlist->stats.nr_unknown_events;
 871 next_event:
 872                 perf_evlist__mmap_consume(top->evlist, idx);
 873         }
 874 }
 875
 876 static void perf_top__mmap_read(struct perf_top *top)
 877 {
 878         int i;
 879
 880         for (i = 0; i < top->evlist->nr_mmaps; i++)
 881                 perf_top__mmap_read_idx(top, i);
 882 }
 883
 884 static int perf_top__start_counters(struct perf_top *top)
 885 {
 886         char msg[512];
 887         struct perf_evsel *counter;
 888         struct perf_evlist *evlist = top->evlist;
 889         struct record_opts *opts = &top->record_opts;
 890
 891         perf_evlist__config(evlist, opts);
 892
 893         evlist__for_each(evlist, counter) {
 894 try_again:
 895                 if (perf_evsel__open(counter, top->evlist->cpus,
 896                                      top->evlist->threads) < 0) {
 897                         if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 898                                 if (verbose)
 899                                         ui__warning("%s\n", msg);
 900                                 goto try_again;
 901                         }
 902
 903                         perf_evsel__open_strerror(counter, &opts->target,
 904                                                   errno, msg, sizeof(msg));
 905                         ui__error("%s\n", msg);
 906                         goto out_err;
 907                 }
 908         }
 909
 910         if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
 911                 ui__error("Failed to mmap with %d (%s)\n",
 912                             errno, strerror_r(errno, msg, sizeof(msg)));
 913                 goto out_err;
 914         }
 915
 916         return 0;
 917
 918 out_err:
 919         return -1;
 920 }
 921
 922 static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused)
 923 {
 924         if (!sort__has_sym) {
 925                 if (symbol_conf.use_callchain) {
 926                         ui__error("Selected -g but \"sym\" not present in --sort/-s.");
 927                         return -EINVAL;
 928                 }
 929         } else if (callchain_param.mode != CHAIN_NONE) {
 930                 if (callchain_register_param(&callchain_param) < 0) {
 931                         ui__error("Can't register callchain params.\n");
 932                         return -EINVAL;
 933                 }
 934         }
 935
 936         return 0;
 937 }
 938
 939 static int __cmd_top(struct perf_top *top)
 940 {
 941         struct record_opts *opts = &top->record_opts;
 942         pthread_t thread;
 943         int ret;
 944
 945         top->session = perf_session__new(NULL, false, NULL);
 946         if (top->session == NULL)
 947                 return -1;
 948
 949         machines__set_symbol_filter(&top->session->machines, symbol_filter);
 950
 951         if (!objdump_path) {
 952                 ret = perf_env__lookup_objdump(&top->session->header.env);
 953                 if (ret)
 954                         goto out_delete;
 955         }
 956
 957         ret = perf_top__setup_sample_type(top);
 958         if (ret)
 959                 goto out_delete;
 960
 961         if (perf_session__register_idle_thread(top->session) < 0)
 962                 goto out_delete;
 963
 964         machine__synthesize_threads(&top->session->machines.host, &opts->target,
 965                                     top->evlist->threads, false, opts->proc_map_timeout);
 966
 967         if (sort__has_socket) {
 968                 ret = perf_env__read_cpu_topology_map(&perf_env);
 969                 if (ret < 0)
 970                         goto out_err_cpu_topo;
 971         }
 972
 973         ret = perf_top__start_counters(top);
 974         if (ret)
 975                 goto out_delete;
 976
 977         top->session->evlist = top->evlist;
 978         perf_session__set_id_hdr_size(top->session);
 979
 980         /*
 981          * When perf is starting the traced process, all the events (apart from
 982          * group members) have enable_on_exec=1 set, so don't spoil it by
 983          * prematurely enabling them.
 984          *
 985          * XXX 'top' still doesn't start workloads like record, trace, but should,
 986          * so leave the check here.
 987          */
 988         if (!target__none(&opts->target))
 989                 perf_evlist__enable(top->evlist);
 990
 991         /* Wait for a minimal set of events before starting the snapshot */
 992         perf_evlist__poll(top->evlist, 100);
 993
 994         perf_top__mmap_read(top);
 995
 996         ret = -1;
 997         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
 998                                                             display_thread), top)) {
 999                 ui__error("Could not create display thread.\n");
1000                 goto out_delete;
1001         }
1002
1003         if (top->realtime_prio) {
1004                 struct sched_param param;
1005
1006                 param.sched_priority = top->realtime_prio;
1007                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1008                         ui__error("Could not set realtime priority.\n");
1009                         goto out_join;
1010                 }
1011         }
1012
1013         while (!done) {
1014                 u64 hits = top->samples;
1015
1016                 perf_top__mmap_read(top);
1017
1018                 if (hits == top->samples)
1019                         ret = perf_evlist__poll(top->evlist, 100);
1020         }
1021
1022         ret = 0;
1023 out_join:
1024         pthread_join(thread, NULL);
1025 out_delete:
1026         perf_session__delete(top->session);
1027         top->session = NULL;
1028
1029         return ret;
1030
1031 out_err_cpu_topo: {
1032         char errbuf[BUFSIZ];
1033         const char *err = strerror_r(-ret, errbuf, sizeof(errbuf));
1034
1035         ui__error("Could not read the CPU topology map: %s\n", err);
1036         goto out_delete;
1037 }
1038 }
1039
1040 static int
1041 callchain_opt(const struct option *opt, const char *arg, int unset)
1042 {
1043         symbol_conf.use_callchain = true;
1044         return record_callchain_opt(opt, arg, unset);
1045 }
1046
1047 static int
1048 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1049 {
1050         struct record_opts *record = (struct record_opts *)opt->value;
1051
1052         record->callgraph_set = true;
1053         callchain_param.enabled = !unset;
1054         callchain_param.record_mode = CALLCHAIN_FP;
1055
1056         /*
1057          * --no-call-graph
1058          */
1059         if (unset) {
1060                 symbol_conf.use_callchain = false;
1061                 callchain_param.record_mode = CALLCHAIN_NONE;
1062                 return 0;
1063         }
1064
1065         return parse_callchain_top_opt(arg);
1066 }
1067
1068 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1069 {
1070         if (!strcmp(var, "top.call-graph"))
1071                 var = "call-graph.record-mode"; /* fall-through */
1072         if (!strcmp(var, "top.children")) {
1073                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1074                 return 0;
1075         }
1076
1077         return 0;
1078 }
1079
1080 static int
1081 parse_percent_limit(const struct option *opt, const char *arg,
1082                     int unset __maybe_unused)
1083 {
1084         struct perf_top *top = opt->value;
1085
1086         top->min_percent = strtof(arg, NULL);
1087         return 0;
1088 }
1089
1090 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1091         "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1092
1093 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1094 {
1095         char errbuf[BUFSIZ];
1096         struct perf_top top = {
1097                 .count_filter        = 5,
1098                 .delay_secs          = 2,
1099                 .record_opts = {
1100                         .mmap_pages     = UINT_MAX,
1101                         .user_freq      = UINT_MAX,
1102                         .user_interval  = ULLONG_MAX,
1103                         .freq           = 4000, /* 4 KHz */
1104                         .target         = {
1105                                 .uses_mmap   = true,
1106                         },
1107                         .proc_map_timeout    = 500,
1108                 },
1109                 .max_stack           = PERF_MAX_STACK_DEPTH,
1110                 .sym_pcnt_filter     = 5,
1111         };
1112         struct record_opts *opts = &top.record_opts;
1113         struct target *target = &opts->target;
1114         const struct option options[] = {
1115         OPT_CALLBACK('e', "event", &top.evlist, "event",
1116                      "event selector. use 'perf list' to list available events",
1117                      parse_events_option),
1118         OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1119         OPT_STRING('p', "pid", &target->pid, "pid",
1120                     "profile events on existing process id"),
1121         OPT_STRING('t', "tid", &target->tid, "tid",
1122                     "profile events on existing thread id"),
1123         OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1124                             "system-wide collection from all CPUs"),
1125         OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1126                     "list of cpus to monitor"),
1127         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1128                    "file", "vmlinux pathname"),
1129         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1130                     "don't load vmlinux even if found"),
1131         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1132                     "hide kernel symbols"),
1133         OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1134                      "number of mmap data pages",
1135                      perf_evlist__parse_mmap_pages),
1136         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1137                     "collect data with this RT SCHED_FIFO priority"),
1138         OPT_INTEGER('d', "delay", &top.delay_secs,
1139                     "number of seconds to delay between refreshes"),
1140         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1141                             "dump the symbol table used for profiling"),
1142         OPT_INTEGER('f', "count-filter", &top.count_filter,
1143                     "only display functions with more events than this"),
1144         OPT_BOOLEAN(0, "group", &opts->group,
1145                             "put the counters into a counter group"),
1146         OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1147                     "child tasks do not inherit counters"),
1148         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1149                     "symbol to annotate"),
1150         OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1151         OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1152         OPT_INTEGER('E', "entries", &top.print_entries,
1153                     "display this many functions"),
1154         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1155                     "hide user symbols"),
1156         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1157         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1158         OPT_INCR('v', "verbose", &verbose,
1159                     "be more verbose (show counter open errors, etc)"),
1160         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1161                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1162                    " Please refer the man page for the complete list."),
1163         OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1164                    "output field(s): overhead, period, sample plus all of sort keys"),
1165         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1166                     "Show a column with the number of samples"),
1167         OPT_CALLBACK_NOOPT('g', NULL, &top.record_opts,
1168                            NULL, "enables call-graph recording and display",
1169                            &callchain_opt),
1170         OPT_CALLBACK(0, "call-graph", &top.record_opts,
1171                      "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1172                      top_callchain_help, &parse_callchain_opt),
1173         OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1174                     "Accumulate callchains of children and show total overhead as well"),
1175         OPT_INTEGER(0, "max-stack", &top.max_stack,
1176                     "Set the maximum stack depth when parsing the callchain. "
1177                     "Default: " __stringify(PERF_MAX_STACK_DEPTH)),
1178         OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1179                    "ignore callees of these functions in call graphs",
1180                    report_parse_ignore_callees_opt),
1181         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1182                     "Show a column with the sum of periods"),
1183         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1184                    "only consider symbols in these dsos"),
1185         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1186                    "only consider symbols in these comms"),
1187         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1188                    "only consider these symbols"),
1189         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1190                     "Interleave source code with assembly code (default)"),
1191         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1192                     "Display raw encoding of assembly instructions (default)"),
1193         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1194                     "Enable kernel symbol demangling"),
1195         OPT_STRING(0, "objdump", &objdump_path, "path",
1196                     "objdump binary to use for disassembly and annotations"),
1197         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1198                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1199         OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1200         OPT_CALLBACK(0, "percent-limit", &top, "percent",
1201                      "Don't show entries under that percent", parse_percent_limit),
1202         OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1203                      "How to display percentage of filtered entries", parse_filter_percentage),
1204         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1205                    "width[,width...]",
1206                    "don't try to adjust column width, use these fixed values"),
1207         OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1208                         "per thread proc mmap processing timeout in ms"),
1209         OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1210                      "branch any", "sample any taken branches",
1211                      parse_branch_stack),
1212         OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1213                      "branch filter mask", "branch stack filter modes",
1214                      parse_branch_stack),
1215         OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1216                     "Show raw trace event output (do not use print fmt or plugins)"),
1217         OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1218                     "Show entries in a hierarchy"),
1219         OPT_END()
1220         };
1221         const char * const top_usage[] = {
1222                 "perf top [<options>]",
1223                 NULL
1224         };
1225         int status = hists__init();
1226
1227         if (status < 0)
1228                 return status;
1229
1230         top.evlist = perf_evlist__new();
1231         if (top.evlist == NULL)
1232                 return -ENOMEM;
1233
1234         perf_config(perf_top_config, &top);
1235
1236         argc = parse_options(argc, argv, options, top_usage, 0);
1237         if (argc)
1238                 usage_with_options(top_usage, options);
1239
1240         if (!top.evlist->nr_entries &&
1241             perf_evlist__add_default(top.evlist) < 0) {
1242                 pr_err("Not enough memory for event selector list\n");
1243                 goto out_delete_evlist;
1244         }
1245
1246         if (symbol_conf.report_hierarchy) {
1247                 /* disable incompatible options */
1248                 symbol_conf.event_group = false;
1249                 symbol_conf.cumulate_callchain = false;
1250
1251                 if (field_order) {
1252                         pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1253                         parse_options_usage(top_usage, options, "fields", 0);
1254                         parse_options_usage(NULL, options, "hierarchy", 0);
1255                         goto out_delete_evlist;
1256                 }
1257         }
1258
1259         sort__mode = SORT_MODE__TOP;
1260         /* display thread wants entries to be collapsed in a different tree */
1261         sort__need_collapse = 1;
1262
1263         if (top.use_stdio)
1264                 use_browser = 0;
1265         else if (top.use_tui)
1266                 use_browser = 1;
1267
1268         setup_browser(false);
1269
1270         if (setup_sorting(top.evlist) < 0) {
1271                 if (sort_order)
1272                         parse_options_usage(top_usage, options, "s", 1);
1273                 if (field_order)
1274                         parse_options_usage(sort_order ? NULL : top_usage,
1275                                             options, "fields", 0);
1276                 goto out_delete_evlist;
1277         }
1278
1279         status = target__validate(target);
1280         if (status) {
1281                 target__strerror(target, status, errbuf, BUFSIZ);
1282                 ui__warning("%s\n", errbuf);
1283         }
1284
1285         status = target__parse_uid(target);
1286         if (status) {
1287                 int saved_errno = errno;
1288
1289                 target__strerror(target, status, errbuf, BUFSIZ);
1290                 ui__error("%s\n", errbuf);
1291
1292                 status = -saved_errno;
1293                 goto out_delete_evlist;
1294         }
1295
1296         if (target__none(target))
1297                 target->system_wide = true;
1298
1299         if (perf_evlist__create_maps(top.evlist, target) < 0) {
1300                 ui__error("Couldn't create thread/CPU maps: %s\n",
1301                           errno == ENOENT ? "No such process" : strerror_r(errno, errbuf, sizeof(errbuf)));
1302                 goto out_delete_evlist;
1303         }
1304
1305         symbol_conf.nr_events = top.evlist->nr_entries;
1306
1307         if (top.delay_secs < 1)
1308                 top.delay_secs = 1;
1309
1310         if (record_opts__config(opts)) {
1311                 status = -EINVAL;
1312                 goto out_delete_evlist;
1313         }
1314
1315         top.sym_evsel = perf_evlist__first(top.evlist);
1316
1317         if (!symbol_conf.use_callchain) {
1318                 symbol_conf.cumulate_callchain = false;
1319                 perf_hpp__cancel_cumulate();
1320         }
1321
1322         if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1323                 callchain_param.order = ORDER_CALLER;
1324
1325         symbol_conf.priv_size = sizeof(struct annotation);
1326
1327         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1328         if (symbol__init(NULL) < 0)
1329                 return -1;
1330
1331         sort__setup_elide(stdout);
1332
1333         get_term_dimensions(&top.winsize);
1334         if (top.print_entries == 0) {
1335                 struct sigaction act = {
1336                         .sa_sigaction = perf_top__sig_winch,
1337                         .sa_flags     = SA_SIGINFO,
1338                 };
1339                 perf_top__update_print_entries(&top);
1340                 sigaction(SIGWINCH, &act, NULL);
1341         }
1342
1343         status = __cmd_top(&top);
1344
1345 out_delete_evlist:
1346         perf_evlist__delete(top.evlist);
1347
1348         return status;
1349 }