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/stringify.h>
  71 #include <linux/types.h>
  72
  73 static volatile int done;
  74
  75 #define HEADER_LINE_NR  5
  76
  77 static void perf_top__update_print_entries(struct perf_top *top)
  78 {
  79         top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
  80 }
  81
  82 static void perf_top__sig_winch(int sig __maybe_unused,
  83                                 siginfo_t *info __maybe_unused, void *arg)
  84 {
  85         struct perf_top *top = arg;
  86
  87         get_term_dimensions(&top->winsize);
  88         perf_top__update_print_entries(top);
  89 }
  90
  91 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
  92 {
  93         struct symbol *sym;
  94         struct annotation *notes;
  95         struct map *map;
  96         int err = -1;
  97
  98         if (!he || !he->ms.sym)
  99                 return -1;
 100
 101         sym = he->ms.sym;
 102         map = he->ms.map;
 103
 104         /*
 105          * We can't annotate with just /proc/kallsyms
 106          */
 107         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
 108             !dso__is_kcore(map->dso)) {
 109                 pr_err("Can't annotate %s: No vmlinux file was found in the "
 110                        "path\n", sym->name);
 111                 sleep(1);
 112                 return -1;
 113         }
 114
 115         notes = symbol__annotation(sym);
 116         if (notes->src != NULL) {
 117                 pthread_mutex_lock(&notes->lock);
 118                 goto out_assign;
 119         }
 120
 121         pthread_mutex_lock(&notes->lock);
 122
 123         if (symbol__alloc_hist(sym) < 0) {
 124                 pthread_mutex_unlock(&notes->lock);
 125                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 126                        sym->name);
 127                 sleep(1);
 128                 return err;
 129         }
 130
 131         err = symbol__annotate(sym, map, 0);
 132         if (err == 0) {
 133 out_assign:
 134                 top->sym_filter_entry = he;
 135         }
 136
 137         pthread_mutex_unlock(&notes->lock);
 138         return err;
 139 }
 140
 141 static void __zero_source_counters(struct hist_entry *he)
 142 {
 143         struct symbol *sym = he->ms.sym;
 144         symbol__annotate_zero_histograms(sym);
 145 }
 146
 147 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
 148 {
 149         struct utsname uts;
 150         int err = uname(&uts);
 151
 152         ui__warning("Out of bounds address found:\n\n"
 153                     "Addr:   %" PRIx64 "\n"
 154                     "DSO:    %s %c\n"
 155                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
 156                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
 157                     "Arch:   %s\n"
 158                     "Kernel: %s\n"
 159                     "Tools:  %s\n\n"
 160                     "Not all samples will be on the annotation output.\n\n"
 161                     "Please report to linux-kernel@vger.kernel.org\n",
 162                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
 163                     map->start, map->end, sym->start, sym->end,
 164                     sym->binding == STB_GLOBAL ? 'g' :
 165                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
 166                     err ? "[unknown]" : uts.machine,
 167                     err ? "[unknown]" : uts.release, perf_version_string);
 168         if (use_browser <= 0)
 169                 sleep(5);
 170
 171         map->erange_warned = true;
 172 }
 173
 174 static void perf_top__record_precise_ip(struct perf_top *top,
 175                                         struct hist_entry *he,
 176                                         int counter, u64 ip)
 177 {
 178         struct annotation *notes;
 179         struct symbol *sym = he->ms.sym;
 180         int err = 0;
 181
 182         if (sym == NULL || (use_browser == 0 &&
 183                             (top->sym_filter_entry == NULL ||
 184                              top->sym_filter_entry->ms.sym != sym)))
 185                 return;
 186
 187         notes = symbol__annotation(sym);
 188
 189         if (pthread_mutex_trylock(&notes->lock))
 190                 return;
 191
 192         err = hist_entry__inc_addr_samples(he, counter, ip);
 193
 194         pthread_mutex_unlock(&notes->lock);
 195
 196         if (unlikely(err)) {
 197                 /*
 198                  * This function is now called with he->hists->lock held.
 199                  * Release it before going to sleep.
 200                  */
 201                 pthread_mutex_unlock(&he->hists->lock);
 202
 203                 if (err == -ERANGE && !he->ms.map->erange_warned)
 204                         ui__warn_map_erange(he->ms.map, sym, ip);
 205                 else if (err == -ENOMEM) {
 206                         pr_err("Not enough memory for annotating '%s' symbol!\n",
 207                                sym->name);
 208                         sleep(1);
 209                 }
 210
 211                 pthread_mutex_lock(&he->hists->lock);
 212         }
 213 }
 214
 215 static void perf_top__show_details(struct perf_top *top)
 216 {
 217         struct hist_entry *he = top->sym_filter_entry;
 218         struct annotation *notes;
 219         struct symbol *symbol;
 220         int more;
 221
 222         if (!he)
 223                 return;
 224
 225         symbol = he->ms.sym;
 226         notes = symbol__annotation(symbol);
 227
 228         pthread_mutex_lock(&notes->lock);
 229
 230         if (notes->src == NULL)
 231                 goto out_unlock;
 232
 233         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
 234         printf("  Events  Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
 235
 236         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
 237                                        0, top->sym_pcnt_filter, top->print_entries, 4);
 238
 239         if (top->evlist->enabled) {
 240                 if (top->zero)
 241                         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
 242                 else
 243                         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
 244         }
 245         if (more != 0)
 246                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 247 out_unlock:
 248         pthread_mutex_unlock(&notes->lock);
 249 }
 250
 251 static void perf_top__print_sym_table(struct perf_top *top)
 252 {
 253         char bf[160];
 254         int printed = 0;
 255         const int win_width = top->winsize.ws_col - 1;
 256         struct perf_evsel *evsel = top->sym_evsel;
 257         struct hists *hists = evsel__hists(evsel);
 258
 259         puts(CONSOLE_CLEAR);
 260
 261         perf_top__header_snprintf(top, bf, sizeof(bf));
 262         printf("%s\n", bf);
 263
 264         perf_top__reset_sample_counters(top);
 265
 266         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 267
 268         if (hists->stats.nr_lost_warned !=
 269             hists->stats.nr_events[PERF_RECORD_LOST]) {
 270                 hists->stats.nr_lost_warned =
 271                               hists->stats.nr_events[PERF_RECORD_LOST];
 272                 color_fprintf(stdout, PERF_COLOR_RED,
 273                               "WARNING: LOST %d chunks, Check IO/CPU overload",
 274                               hists->stats.nr_lost_warned);
 275                 ++printed;
 276         }
 277
 278         if (top->sym_filter_entry) {
 279                 perf_top__show_details(top);
 280                 return;
 281         }
 282
 283         if (top->evlist->enabled) {
 284                 if (top->zero) {
 285                         hists__delete_entries(hists);
 286                 } else {
 287                         hists__decay_entries(hists, top->hide_user_symbols,
 288                                              top->hide_kernel_symbols);
 289                 }
 290         }
 291
 292         hists__collapse_resort(hists, NULL);
 293         perf_evsel__output_resort(evsel, NULL);
 294
 295         hists__output_recalc_col_len(hists, top->print_entries - printed);
 296         putchar('\n');
 297         hists__fprintf(hists, false, top->print_entries - printed, win_width,
 298                        top->min_percent, stdout, symbol_conf.use_callchain);
 299 }
 300
 301 static void prompt_integer(int *target, const char *msg)
 302 {
 303         char *buf = malloc(0), *p;
 304         size_t dummy = 0;
 305         int tmp;
 306
 307         fprintf(stdout, "\n%s: ", msg);
 308         if (getline(&buf, &dummy, stdin) < 0)
 309                 return;
 310
 311         p = strchr(buf, '\n');
 312         if (p)
 313                 *p = 0;
 314
 315         p = buf;
 316         while(*p) {
 317                 if (!isdigit(*p))
 318                         goto out_free;
 319                 p++;
 320         }
 321         tmp = strtoul(buf, NULL, 10);
 322         *target = tmp;
 323 out_free:
 324         free(buf);
 325 }
 326
 327 static void prompt_percent(int *target, const char *msg)
 328 {
 329         int tmp = 0;
 330
 331         prompt_integer(&tmp, msg);
 332         if (tmp >= 0 && tmp <= 100)
 333                 *target = tmp;
 334 }
 335
 336 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 337 {
 338         char *buf = malloc(0), *p;
 339         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 340         struct hists *hists = evsel__hists(top->sym_evsel);
 341         struct rb_node *next;
 342         size_t dummy = 0;
 343
 344         /* zero counters of active symbol */
 345         if (syme) {
 346                 __zero_source_counters(syme);
 347                 top->sym_filter_entry = NULL;
 348         }
 349
 350         fprintf(stdout, "\n%s: ", msg);
 351         if (getline(&buf, &dummy, stdin) < 0)
 352                 goto out_free;
 353
 354         p = strchr(buf, '\n');
 355         if (p)
 356                 *p = 0;
 357
 358         next = rb_first(&hists->entries);
 359         while (next) {
 360                 n = rb_entry(next, struct hist_entry, rb_node);
 361                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
 362                         found = n;
 363                         break;
 364                 }
 365                 next = rb_next(&n->rb_node);
 366         }
 367
 368         if (!found) {
 369                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 370                 sleep(1);
 371         } else
 372                 perf_top__parse_source(top, found);
 373
 374 out_free:
 375         free(buf);
 376 }
 377
 378 static void perf_top__print_mapped_keys(struct perf_top *top)
 379 {
 380         char *name = NULL;
 381
 382         if (top->sym_filter_entry) {
 383                 struct symbol *sym = top->sym_filter_entry->ms.sym;
 384                 name = sym->name;
 385         }
 386
 387         fprintf(stdout, "\nMapped keys:\n");
 388         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
 389         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
 390
 391         if (top->evlist->nr_entries > 1)
 392                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
 393
 394         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
 395
 396         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
 397         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 398         fprintf(stdout, "\t[S]     stop annotation.\n");
 399
 400         fprintf(stdout,
 401                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 402                 top->hide_kernel_symbols ? "yes" : "no");
 403         fprintf(stdout,
 404                 "\t[U]     hide user symbols.               \t(%s)\n",
 405                 top->hide_user_symbols ? "yes" : "no");
 406         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
 407         fprintf(stdout, "\t[qQ]    quit.\n");
 408 }
 409
 410 static int perf_top__key_mapped(struct perf_top *top, int c)
 411 {
 412         switch (c) {
 413                 case 'd':
 414                 case 'e':
 415                 case 'f':
 416                 case 'z':
 417                 case 'q':
 418                 case 'Q':
 419                 case 'K':
 420                 case 'U':
 421                 case 'F':
 422                 case 's':
 423                 case 'S':
 424                         return 1;
 425                 case 'E':
 426                         return top->evlist->nr_entries > 1 ? 1 : 0;
 427                 default:
 428                         break;
 429         }
 430
 431         return 0;
 432 }
 433
 434 static bool perf_top__handle_keypress(struct perf_top *top, int c)
 435 {
 436         bool ret = true;
 437
 438         if (!perf_top__key_mapped(top, c)) {
 439                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 440                 struct termios save;
 441
 442                 perf_top__print_mapped_keys(top);
 443                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 444                 fflush(stdout);
 445
 446                 set_term_quiet_input(&save);
 447
 448                 poll(&stdin_poll, 1, -1);
 449                 c = getc(stdin);
 450
 451                 tcsetattr(0, TCSAFLUSH, &save);
 452                 if (!perf_top__key_mapped(top, c))
 453                         return ret;
 454         }
 455
 456         switch (c) {
 457                 case 'd':
 458                         prompt_integer(&top->delay_secs, "Enter display delay");
 459                         if (top->delay_secs < 1)
 460                                 top->delay_secs = 1;
 461                         break;
 462                 case 'e':
 463                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
 464                         if (top->print_entries == 0) {
 465                                 struct sigaction act = {
 466                                         .sa_sigaction = perf_top__sig_winch,
 467                                         .sa_flags     = SA_SIGINFO,
 468                                 };
 469                                 perf_top__sig_winch(SIGWINCH, NULL, top);
 470                                 sigaction(SIGWINCH, &act, NULL);
 471                         } else {
 472                                 signal(SIGWINCH, SIG_DFL);
 473                         }
 474                         break;
 475                 case 'E':
 476                         if (top->evlist->nr_entries > 1) {
 477                                 /* Select 0 as the default event: */
 478                                 int counter = 0;
 479
 480                                 fprintf(stderr, "\nAvailable events:");
 481
 482                                 evlist__for_each(top->evlist, top->sym_evsel)
 483                                         fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
 484
 485                                 prompt_integer(&counter, "Enter details event counter");
 486
 487                                 if (counter >= top->evlist->nr_entries) {
 488                                         top->sym_evsel = perf_evlist__first(top->evlist);
 489                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
 490                                         sleep(1);
 491                                         break;
 492                                 }
 493                                 evlist__for_each(top->evlist, top->sym_evsel)
 494                                         if (top->sym_evsel->idx == counter)
 495                                                 break;
 496                         } else
 497                                 top->sym_evsel = perf_evlist__first(top->evlist);
 498                         break;
 499                 case 'f':
 500                         prompt_integer(&top->count_filter, "Enter display event count filter");
 501                         break;
 502                 case 'F':
 503                         prompt_percent(&top->sym_pcnt_filter,
 504                                        "Enter details display event filter (percent)");
 505                         break;
 506                 case 'K':
 507                         top->hide_kernel_symbols = !top->hide_kernel_symbols;
 508                         break;
 509                 case 'q':
 510                 case 'Q':
 511                         printf("exiting.\n");
 512                         if (top->dump_symtab)
 513                                 perf_session__fprintf_dsos(top->session, stderr);
 514                         ret = false;
 515                         break;
 516                 case 's':
 517                         perf_top__prompt_symbol(top, "Enter details symbol");
 518                         break;
 519                 case 'S':
 520                         if (!top->sym_filter_entry)
 521                                 break;
 522                         else {
 523                                 struct hist_entry *syme = top->sym_filter_entry;
 524
 525                                 top->sym_filter_entry = NULL;
 526                                 __zero_source_counters(syme);
 527                         }
 528                         break;
 529                 case 'U':
 530                         top->hide_user_symbols = !top->hide_user_symbols;
 531                         break;
 532                 case 'z':
 533                         top->zero = !top->zero;
 534                         break;
 535                 default:
 536                         break;
 537         }
 538
 539         return ret;
 540 }
 541
 542 static void perf_top__sort_new_samples(void *arg)
 543 {
 544         struct perf_top *t = arg;
 545         struct perf_evsel *evsel = t->sym_evsel;
 546         struct hists *hists;
 547
 548         perf_top__reset_sample_counters(t);
 549
 550         if (t->evlist->selected != NULL)
 551                 t->sym_evsel = t->evlist->selected;
 552
 553         hists = evsel__hists(evsel);
 554
 555         if (t->evlist->enabled) {
 556                 if (t->zero) {
 557                         hists__delete_entries(hists);
 558                 } else {
 559                         hists__decay_entries(hists, t->hide_user_symbols,
 560                                              t->hide_kernel_symbols);
 561                 }
 562         }
 563
 564         hists__collapse_resort(hists, NULL);
 565         perf_evsel__output_resort(evsel, NULL);
 566 }
 567
 568 static void *display_thread_tui(void *arg)
 569 {
 570         struct perf_evsel *pos;
 571         struct perf_top *top = arg;
 572         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
 573         struct hist_browser_timer hbt = {
 574                 .timer          = perf_top__sort_new_samples,
 575                 .arg            = top,
 576                 .refresh        = top->delay_secs,
 577         };
 578
 579         perf_top__sort_new_samples(top);
 580
 581         /*
 582          * Initialize the uid_filter_str, in the future the TUI will allow
 583          * Zooming in/out UIDs. For now juse use whatever the user passed
 584          * via --uid.
 585          */
 586         evlist__for_each(top->evlist, pos) {
 587                 struct hists *hists = evsel__hists(pos);
 588                 hists->uid_filter_str = top->record_opts.target.uid_str;
 589         }
 590
 591         perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
 592                                       top->min_percent,
 593                                       &top->session->header.env);
 594
 595         done = 1;
 596         return NULL;
 597 }
 598
 599 static void display_sig(int sig __maybe_unused)
 600 {
 601         done = 1;
 602 }
 603
 604 static void display_setup_sig(void)
 605 {
 606         signal(SIGSEGV, sighandler_dump_stack);
 607         signal(SIGFPE, sighandler_dump_stack);
 608         signal(SIGINT,  display_sig);
 609         signal(SIGQUIT, display_sig);
 610         signal(SIGTERM, display_sig);
 611 }
 612
 613 static void *display_thread(void *arg)
 614 {
 615         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 616         struct termios save;
 617         struct perf_top *top = arg;
 618         int delay_msecs, c;
 619
 620         display_setup_sig();
 621         pthread__unblock_sigwinch();
 622 repeat:
 623         delay_msecs = top->delay_secs * 1000;
 624         set_term_quiet_input(&save);
 625         /* trash return*/
 626         getc(stdin);
 627
 628         while (!done) {
 629                 perf_top__print_sym_table(top);
 630                 /*
 631                  * Either timeout expired or we got an EINTR due to SIGWINCH,
 632                  * refresh screen in both cases.
 633                  */
 634                 switch (poll(&stdin_poll, 1, delay_msecs)) {
 635                 case 0:
 636                         continue;
 637                 case -1:
 638                         if (errno == EINTR)
 639                                 continue;
 640                         /* Fall trhu */
 641                 default:
 642                         c = getc(stdin);
 643                         tcsetattr(0, TCSAFLUSH, &save);
 644
 645                         if (perf_top__handle_keypress(top, c))
 646                                 goto repeat;
 647                         done = 1;
 648                 }
 649         }
 650
 651         tcsetattr(0, TCSAFLUSH, &save);
 652         return NULL;
 653 }
 654
 655 static int symbol_filter(struct map *map, struct symbol *sym)
 656 {
 657         const char *name = sym->name;
 658
 659         if (!__map__is_kernel(map))
 660                 return 0;
 661         /*
 662          * ppc64 uses function descriptors and appends a '.' to the
 663          * start of every instruction address. Remove it.
 664          */
 665         if (name[0] == '.')
 666                 name++;
 667
 668         if (!strcmp(name, "_text") ||
 669             !strcmp(name, "_etext") ||
 670             !strcmp(name, "_sinittext") ||
 671             !strncmp("init_module", name, 11) ||
 672             !strncmp("cleanup_module", name, 14) ||
 673             strstr(name, "_text_start") ||
 674             strstr(name, "_text_end"))
 675                 return 1;
 676
 677         if (symbol__is_idle(sym))
 678                 sym->ignore = true;
 679
 680         return 0;
 681 }
 682
 683 static int hist_iter__top_callback(struct hist_entry_iter *iter,
 684                                    struct addr_location *al, bool single,
 685                                    void *arg)
 686 {
 687         struct perf_top *top = arg;
 688         struct hist_entry *he = iter->he;
 689         struct perf_evsel *evsel = iter->evsel;
 690
 691         if (perf_hpp_list.sym && single)
 692                 perf_top__record_precise_ip(top, he, evsel->idx, al->addr);
 693
 694         hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
 695                      !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
 696         return 0;
 697 }
 698
 699 static void perf_event__process_sample(struct perf_tool *tool,
 700                                        const union perf_event *event,
 701                                        struct perf_evsel *evsel,
 702                                        struct perf_sample *sample,
 703                                        struct machine *machine)
 704 {
 705         struct perf_top *top = container_of(tool, struct perf_top, tool);
 706         struct addr_location al;
 707         int err;
 708
 709         if (!machine && perf_guest) {
 710                 static struct intlist *seen;
 711
 712                 if (!seen)
 713                         seen = intlist__new(NULL);
 714
 715                 if (!intlist__has_entry(seen, sample->pid)) {
 716                         pr_err("Can't find guest [%d]'s kernel information\n",
 717                                 sample->pid);
 718                         intlist__add(seen, sample->pid);
 719                 }
 720                 return;
 721         }
 722
 723         if (!machine) {
 724                 pr_err("%u unprocessable samples recorded.\r",
 725                        top->session->evlist->stats.nr_unprocessable_samples++);
 726                 return;
 727         }
 728
 729         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
 730                 top->exact_samples++;
 731
 732         if (machine__resolve(machine, &al, sample) < 0)
 733                 return;
 734
 735         if (!machine->kptr_restrict_warned &&
 736             symbol_conf.kptr_restrict &&
 737             al.cpumode == PERF_RECORD_MISC_KERNEL) {
 738                 ui__warning(
 739 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 740 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 741 "Kernel%s samples will not be resolved.\n",
 742                           al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
 743                           " modules" : "");
 744                 if (use_browser <= 0)
 745                         sleep(5);
 746                 machine->kptr_restrict_warned = true;
 747         }
 748
 749         if (al.sym == NULL) {
 750                 const char *msg = "Kernel samples will not be resolved.\n";
 751                 /*
 752                  * As we do lazy loading of symtabs we only will know if the
 753                  * specified vmlinux file is invalid when we actually have a
 754                  * hit in kernel space and then try to load it. So if we get
 755                  * here and there are _no_ symbols in the DSO backing the
 756                  * kernel map, bail out.
 757                  *
 758                  * We may never get here, for instance, if we use -K/
 759                  * --hide-kernel-symbols, even if the user specifies an
 760                  * invalid --vmlinux ;-)
 761                  */
 762                 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
 763                     al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
 764                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
 765                         if (symbol_conf.vmlinux_name) {
 766                                 char serr[256];
 767                                 dso__strerror_load(al.map->dso, serr, sizeof(serr));
 768                                 ui__warning("The %s file can't be used: %s\n%s",
 769                                             symbol_conf.vmlinux_name, serr, msg);
 770                         } else {
 771                                 ui__warning("A vmlinux file was not found.\n%s",
 772                                             msg);
 773                         }
 774
 775                         if (use_browser <= 0)
 776                                 sleep(5);
 777                         top->vmlinux_warned = true;
 778                 }
 779         }
 780
 781         if (al.sym == NULL || !al.sym->ignore) {
 782                 struct hists *hists = evsel__hists(evsel);
 783                 struct hist_entry_iter iter = {
 784                         .evsel          = evsel,
 785                         .sample         = sample,
 786                         .add_entry_cb   = hist_iter__top_callback,
 787                 };
 788
 789                 if (symbol_conf.cumulate_callchain)
 790                         iter.ops = &hist_iter_cumulative;
 791                 else
 792                         iter.ops = &hist_iter_normal;
 793
 794                 pthread_mutex_lock(&hists->lock);
 795
 796                 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
 797                 if (err < 0)
 798                         pr_err("Problem incrementing symbol period, skipping event\n");
 799
 800                 pthread_mutex_unlock(&hists->lock);
 801         }
 802
 803         addr_location__put(&al);
 804 }
 805
 806 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 807 {
 808         struct perf_sample sample;
 809         struct perf_evsel *evsel;
 810         struct perf_session *session = top->session;
 811         union perf_event *event;
 812         struct machine *machine;
 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                 if (event->header.type == PERF_RECORD_SAMPLE)
 826                         ++top->samples;
 827
 828                 switch (sample.cpumode) {
 829                 case PERF_RECORD_MISC_USER:
 830                         ++top->us_samples;
 831                         if (top->hide_user_symbols)
 832                                 goto next_event;
 833                         machine = &session->machines.host;
 834                         break;
 835                 case PERF_RECORD_MISC_KERNEL:
 836                         ++top->kernel_samples;
 837                         if (top->hide_kernel_symbols)
 838                                 goto next_event;
 839                         machine = &session->machines.host;
 840                         break;
 841                 case PERF_RECORD_MISC_GUEST_KERNEL:
 842                         ++top->guest_kernel_samples;
 843                         machine = perf_session__find_machine(session,
 844                                                              sample.pid);
 845                         break;
 846                 case PERF_RECORD_MISC_GUEST_USER:
 847                         ++top->guest_us_samples;
 848                         /*
 849                          * TODO: we don't process guest user from host side
 850                          * except simple counting.
 851                          */
 852                         goto next_event;
 853                 default:
 854                         if (event->header.type == PERF_RECORD_SAMPLE)
 855                                 goto next_event;
 856                         machine = &session->machines.host;
 857                         break;
 858                 }
 859
 860
 861                 if (event->header.type == PERF_RECORD_SAMPLE) {
 862                         perf_event__process_sample(&top->tool, event, evsel,
 863                                                    &sample, machine);
 864                 } else if (event->header.type < PERF_RECORD_MAX) {
 865                         hists__inc_nr_events(evsel__hists(evsel), event->header.type);
 866                         machine__process_event(machine, event, &sample);
 867                 } else
 868                         ++session->evlist->stats.nr_unknown_events;
 869 next_event:
 870                 perf_evlist__mmap_consume(top->evlist, idx);
 871         }
 872 }
 873
 874 static void perf_top__mmap_read(struct perf_top *top)
 875 {
 876         int i;
 877
 878         for (i = 0; i < top->evlist->nr_mmaps; i++)
 879                 perf_top__mmap_read_idx(top, i);
 880 }
 881
 882 static int perf_top__start_counters(struct perf_top *top)
 883 {
 884         char msg[512];
 885         struct perf_evsel *counter;
 886         struct perf_evlist *evlist = top->evlist;
 887         struct record_opts *opts = &top->record_opts;
 888
 889         perf_evlist__config(evlist, opts, &callchain_param);
 890
 891         evlist__for_each(evlist, counter) {
 892 try_again:
 893                 if (perf_evsel__open(counter, top->evlist->cpus,
 894                                      top->evlist->threads) < 0) {
 895                         if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 896                                 if (verbose)
 897                                         ui__warning("%s\n", msg);
 898                                 goto try_again;
 899                         }
 900
 901                         perf_evsel__open_strerror(counter, &opts->target,
 902                                                   errno, msg, sizeof(msg));
 903                         ui__error("%s\n", msg);
 904                         goto out_err;
 905                 }
 906         }
 907
 908         if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
 909                 ui__error("Failed to mmap with %d (%s)\n",
 910                             errno, strerror_r(errno, msg, sizeof(msg)));
 911                 goto out_err;
 912         }
 913
 914         return 0;
 915
 916 out_err:
 917         return -1;
 918 }
 919
 920 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
 921 {
 922         if (!perf_hpp_list.sym) {
 923                 if (callchain->enabled) {
 924                         ui__error("Selected -g but \"sym\" not present in --sort/-s.");
 925                         return -EINVAL;
 926                 }
 927         } else if (callchain->mode != CHAIN_NONE) {
 928                 if (callchain_register_param(callchain) < 0) {
 929                         ui__error("Can't register callchain params.\n");
 930                         return -EINVAL;
 931                 }
 932         }
 933
 934         return 0;
 935 }
 936
 937 static int __cmd_top(struct perf_top *top)
 938 {
 939         struct record_opts *opts = &top->record_opts;
 940         pthread_t thread;
 941         int ret;
 942
 943         top->session = perf_session__new(NULL, false, NULL);
 944         if (top->session == NULL)
 945                 return -1;
 946
 947         machines__set_symbol_filter(&top->session->machines, symbol_filter);
 948
 949         if (!objdump_path) {
 950                 ret = perf_env__lookup_objdump(&top->session->header.env);
 951                 if (ret)
 952                         goto out_delete;
 953         }
 954
 955         ret = callchain_param__setup_sample_type(&callchain_param);
 956         if (ret)
 957                 goto out_delete;
 958
 959         if (perf_session__register_idle_thread(top->session) < 0)
 960                 goto out_delete;
 961
 962         machine__synthesize_threads(&top->session->machines.host, &opts->target,
 963                                     top->evlist->threads, false, opts->proc_map_timeout);
 964
 965         if (perf_hpp_list.socket) {
 966                 ret = perf_env__read_cpu_topology_map(&perf_env);
 967                 if (ret < 0)
 968                         goto out_err_cpu_topo;
 969         }
 970
 971         ret = perf_top__start_counters(top);
 972         if (ret)
 973                 goto out_delete;
 974
 975         top->session->evlist = top->evlist;
 976         perf_session__set_id_hdr_size(top->session);
 977
 978         /*
 979          * When perf is starting the traced process, all the events (apart from
 980          * group members) have enable_on_exec=1 set, so don't spoil it by
 981          * prematurely enabling them.
 982          *
 983          * XXX 'top' still doesn't start workloads like record, trace, but should,
 984          * so leave the check here.
 985          */
 986         if (!target__none(&opts->target))
 987                 perf_evlist__enable(top->evlist);
 988
 989         /* Wait for a minimal set of events before starting the snapshot */
 990         perf_evlist__poll(top->evlist, 100);
 991
 992         perf_top__mmap_read(top);
 993
 994         ret = -1;
 995         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
 996                                                             display_thread), top)) {
 997                 ui__error("Could not create display thread.\n");
 998                 goto out_delete;
 999         }
1000
1001         if (top->realtime_prio) {
1002                 struct sched_param param;
1003
1004                 param.sched_priority = top->realtime_prio;
1005                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1006                         ui__error("Could not set realtime priority.\n");
1007                         goto out_join;
1008                 }
1009         }
1010
1011         while (!done) {
1012                 u64 hits = top->samples;
1013
1014                 perf_top__mmap_read(top);
1015
1016                 if (hits == top->samples)
1017                         ret = perf_evlist__poll(top->evlist, 100);
1018         }
1019
1020         ret = 0;
1021 out_join:
1022         pthread_join(thread, NULL);
1023 out_delete:
1024         perf_session__delete(top->session);
1025         top->session = NULL;
1026
1027         return ret;
1028
1029 out_err_cpu_topo: {
1030         char errbuf[BUFSIZ];
1031         const char *err = strerror_r(-ret, errbuf, sizeof(errbuf));
1032
1033         ui__error("Could not read the CPU topology map: %s\n", err);
1034         goto out_delete;
1035 }
1036 }
1037
1038 static int
1039 callchain_opt(const struct option *opt, const char *arg, int unset)
1040 {
1041         symbol_conf.use_callchain = true;
1042         return record_callchain_opt(opt, arg, unset);
1043 }
1044
1045 static int
1046 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1047 {
1048         struct callchain_param *callchain = opt->value;
1049
1050         callchain->enabled = !unset;
1051         callchain->record_mode = CALLCHAIN_FP;
1052
1053         /*
1054          * --no-call-graph
1055          */
1056         if (unset) {
1057                 symbol_conf.use_callchain = false;
1058                 callchain->record_mode = CALLCHAIN_NONE;
1059                 return 0;
1060         }
1061
1062         return parse_callchain_top_opt(arg);
1063 }
1064
1065 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1066 {
1067         if (!strcmp(var, "top.call-graph"))
1068                 var = "call-graph.record-mode"; /* fall-through */
1069         if (!strcmp(var, "top.children")) {
1070                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1071                 return 0;
1072         }
1073
1074         return 0;
1075 }
1076
1077 static int
1078 parse_percent_limit(const struct option *opt, const char *arg,
1079                     int unset __maybe_unused)
1080 {
1081         struct perf_top *top = opt->value;
1082
1083         top->min_percent = strtof(arg, NULL);
1084         return 0;
1085 }
1086
1087 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1088         "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1089
1090 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1091 {
1092         char errbuf[BUFSIZ];
1093         struct perf_top top = {
1094                 .count_filter        = 5,
1095                 .delay_secs          = 2,
1096                 .record_opts = {
1097                         .mmap_pages     = UINT_MAX,
1098                         .user_freq      = UINT_MAX,
1099                         .user_interval  = ULLONG_MAX,
1100                         .freq           = 4000, /* 4 KHz */
1101                         .target         = {
1102                                 .uses_mmap   = true,
1103                         },
1104                         .proc_map_timeout    = 500,
1105                 },
1106                 .max_stack           = sysctl_perf_event_max_stack,
1107                 .sym_pcnt_filter     = 5,
1108         };
1109         struct record_opts *opts = &top.record_opts;
1110         struct target *target = &opts->target;
1111         const struct option options[] = {
1112         OPT_CALLBACK('e', "event", &top.evlist, "event",
1113                      "event selector. use 'perf list' to list available events",
1114                      parse_events_option),
1115         OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1116         OPT_STRING('p', "pid", &target->pid, "pid",
1117                     "profile events on existing process id"),
1118         OPT_STRING('t', "tid", &target->tid, "tid",
1119                     "profile events on existing thread id"),
1120         OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1121                             "system-wide collection from all CPUs"),
1122         OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1123                     "list of cpus to monitor"),
1124         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1125                    "file", "vmlinux pathname"),
1126         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1127                     "don't load vmlinux even if found"),
1128         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1129                     "hide kernel symbols"),
1130         OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1131                      "number of mmap data pages",
1132                      perf_evlist__parse_mmap_pages),
1133         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1134                     "collect data with this RT SCHED_FIFO priority"),
1135         OPT_INTEGER('d', "delay", &top.delay_secs,
1136                     "number of seconds to delay between refreshes"),
1137         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1138                             "dump the symbol table used for profiling"),
1139         OPT_INTEGER('f', "count-filter", &top.count_filter,
1140                     "only display functions with more events than this"),
1141         OPT_BOOLEAN(0, "group", &opts->group,
1142                             "put the counters into a counter group"),
1143         OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1144                     "child tasks do not inherit counters"),
1145         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1146                     "symbol to annotate"),
1147         OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1148         OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1149         OPT_INTEGER('E', "entries", &top.print_entries,
1150                     "display this many functions"),
1151         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1152                     "hide user symbols"),
1153         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1154         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1155         OPT_INCR('v', "verbose", &verbose,
1156                     "be more verbose (show counter open errors, etc)"),
1157         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1158                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1159                    " Please refer the man page for the complete list."),
1160         OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1161                    "output field(s): overhead, period, sample plus all of sort keys"),
1162         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1163                     "Show a column with the number of samples"),
1164         OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1165                            NULL, "enables call-graph recording and display",
1166                            &callchain_opt),
1167         OPT_CALLBACK(0, "call-graph", &callchain_param,
1168                      "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1169                      top_callchain_help, &parse_callchain_opt),
1170         OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1171                     "Accumulate callchains of children and show total overhead as well"),
1172         OPT_INTEGER(0, "max-stack", &top.max_stack,
1173                     "Set the maximum stack depth when parsing the callchain. "
1174                     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1175         OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1176                    "ignore callees of these functions in call graphs",
1177                    report_parse_ignore_callees_opt),
1178         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1179                     "Show a column with the sum of periods"),
1180         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1181                    "only consider symbols in these dsos"),
1182         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1183                    "only consider symbols in these comms"),
1184         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1185                    "only consider these symbols"),
1186         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1187                     "Interleave source code with assembly code (default)"),
1188         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1189                     "Display raw encoding of assembly instructions (default)"),
1190         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1191                     "Enable kernel symbol demangling"),
1192         OPT_STRING(0, "objdump", &objdump_path, "path",
1193                     "objdump binary to use for disassembly and annotations"),
1194         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1195                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1196         OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1197         OPT_CALLBACK(0, "percent-limit", &top, "percent",
1198                      "Don't show entries under that percent", parse_percent_limit),
1199         OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1200                      "How to display percentage of filtered entries", parse_filter_percentage),
1201         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1202                    "width[,width...]",
1203                    "don't try to adjust column width, use these fixed values"),
1204         OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1205                         "per thread proc mmap processing timeout in ms"),
1206         OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1207                      "branch any", "sample any taken branches",
1208                      parse_branch_stack),
1209         OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1210                      "branch filter mask", "branch stack filter modes",
1211                      parse_branch_stack),
1212         OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1213                     "Show raw trace event output (do not use print fmt or plugins)"),
1214         OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1215                     "Show entries in a hierarchy"),
1216         OPT_END()
1217         };
1218         const char * const top_usage[] = {
1219                 "perf top [<options>]",
1220                 NULL
1221         };
1222         int status = hists__init();
1223
1224         if (status < 0)
1225                 return status;
1226
1227         top.evlist = perf_evlist__new();
1228         if (top.evlist == NULL)
1229                 return -ENOMEM;
1230
1231         perf_config(perf_top_config, &top);
1232
1233         argc = parse_options(argc, argv, options, top_usage, 0);
1234         if (argc)
1235                 usage_with_options(top_usage, options);
1236
1237         if (!top.evlist->nr_entries &&
1238             perf_evlist__add_default(top.evlist) < 0) {
1239                 pr_err("Not enough memory for event selector list\n");
1240                 goto out_delete_evlist;
1241         }
1242
1243         if (symbol_conf.report_hierarchy) {
1244                 /* disable incompatible options */
1245                 symbol_conf.event_group = false;
1246                 symbol_conf.cumulate_callchain = false;
1247
1248                 if (field_order) {
1249                         pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1250                         parse_options_usage(top_usage, options, "fields", 0);
1251                         parse_options_usage(NULL, options, "hierarchy", 0);
1252                         goto out_delete_evlist;
1253                 }
1254         }
1255
1256         sort__mode = SORT_MODE__TOP;
1257         /* display thread wants entries to be collapsed in a different tree */
1258         perf_hpp_list.need_collapse = 1;
1259
1260         if (top.use_stdio)
1261                 use_browser = 0;
1262         else if (top.use_tui)
1263                 use_browser = 1;
1264
1265         setup_browser(false);
1266
1267         if (setup_sorting(top.evlist) < 0) {
1268                 if (sort_order)
1269                         parse_options_usage(top_usage, options, "s", 1);
1270                 if (field_order)
1271                         parse_options_usage(sort_order ? NULL : top_usage,
1272                                             options, "fields", 0);
1273                 goto out_delete_evlist;
1274         }
1275
1276         status = target__validate(target);
1277         if (status) {
1278                 target__strerror(target, status, errbuf, BUFSIZ);
1279                 ui__warning("%s\n", errbuf);
1280         }
1281
1282         status = target__parse_uid(target);
1283         if (status) {
1284                 int saved_errno = errno;
1285
1286                 target__strerror(target, status, errbuf, BUFSIZ);
1287                 ui__error("%s\n", errbuf);
1288
1289                 status = -saved_errno;
1290                 goto out_delete_evlist;
1291         }
1292
1293         if (target__none(target))
1294                 target->system_wide = true;
1295
1296         if (perf_evlist__create_maps(top.evlist, target) < 0) {
1297                 ui__error("Couldn't create thread/CPU maps: %s\n",
1298                           errno == ENOENT ? "No such process" : strerror_r(errno, errbuf, sizeof(errbuf)));
1299                 goto out_delete_evlist;
1300         }
1301
1302         symbol_conf.nr_events = top.evlist->nr_entries;
1303
1304         if (top.delay_secs < 1)
1305                 top.delay_secs = 1;
1306
1307         if (record_opts__config(opts)) {
1308                 status = -EINVAL;
1309                 goto out_delete_evlist;
1310         }
1311
1312         top.sym_evsel = perf_evlist__first(top.evlist);
1313
1314         if (!callchain_param.enabled) {
1315                 symbol_conf.cumulate_callchain = false;
1316                 perf_hpp__cancel_cumulate();
1317         }
1318
1319         if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1320                 callchain_param.order = ORDER_CALLER;
1321
1322         symbol_conf.priv_size = sizeof(struct annotation);
1323
1324         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1325         if (symbol__init(NULL) < 0)
1326                 return -1;
1327
1328         sort__setup_elide(stdout);
1329
1330         get_term_dimensions(&top.winsize);
1331         if (top.print_entries == 0) {
1332                 struct sigaction act = {
1333                         .sa_sigaction = perf_top__sig_winch,
1334                         .sa_flags     = SA_SIGINFO,
1335                 };
1336                 perf_top__update_print_entries(&top);
1337                 sigaction(SIGWINCH, &act, NULL);
1338         }
1339
1340         status = __cmd_top(&top);
1341
1342 out_delete_evlist:
1343         perf_evlist__delete(top.evlist);
1344
1345         return status;
1346 }