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/config.h"
  26 #include "util/color.h"
  27 #include "util/drv_configs.h"
  28 #include "util/evlist.h"
  29 #include "util/evsel.h"
  30 #include "util/machine.h"
  31 #include "util/session.h"
  32 #include "util/symbol.h"
  33 #include "util/thread.h"
  34 #include "util/thread_map.h"
  35 #include "util/top.h"
  36 #include "util/util.h"
  37 #include <linux/rbtree.h>
  38 #include <subcmd/parse-options.h>
  39 #include "util/parse-events.h"
  40 #include "util/cpumap.h"
  41 #include "util/xyarray.h"
  42 #include "util/sort.h"
  43 #include "util/intlist.h"
  44 #include "util/parse-branch-options.h"
  45 #include "arch/common.h"
  46
  47 #include "util/debug.h"
  48
  49 #include <assert.h>
  50 #include <elf.h>
  51 #include <fcntl.h>
  52
  53 #include <stdio.h>
  54 #include <termios.h>
  55 #include <unistd.h>
  56 #include <inttypes.h>
  57
  58 #include <errno.h>
  59 #include <time.h>
  60 #include <sched.h>
  61
  62 #include <sys/syscall.h>
  63 #include <sys/ioctl.h>
  64 #include <poll.h>
  65 #include <sys/prctl.h>
  66 #include <sys/wait.h>
  67 #include <sys/uio.h>
  68 #include <sys/utsname.h>
  69 #include <sys/mman.h>
  70
  71 #include <linux/stringify.h>
  72 #include <linux/time64.h>
  73 #include <linux/types.h>
  74
  75 static volatile int done;
  76 static volatile int resize;
  77
  78 #define HEADER_LINE_NR  5
  79
  80 static void perf_top__update_print_entries(struct perf_top *top)
  81 {
  82         top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
  83 }
  84
  85 static void perf_top__sig_winch(int sig __maybe_unused,
  86                                 siginfo_t *info __maybe_unused, void *arg __maybe_unused)
  87 {
  88         resize = 1;
  89 }
  90
  91 static void perf_top__resize(struct perf_top *top)
  92 {
  93         get_term_dimensions(&top->winsize);
  94         perf_top__update_print_entries(top);
  95 }
  96
  97 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
  98 {
  99         struct symbol *sym;
 100         struct annotation *notes;
 101         struct map *map;
 102         int err = -1;
 103
 104         if (!he || !he->ms.sym)
 105                 return -1;
 106
 107         sym = he->ms.sym;
 108         map = he->ms.map;
 109
 110         /*
 111          * We can't annotate with just /proc/kallsyms
 112          */
 113         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
 114             !dso__is_kcore(map->dso)) {
 115                 pr_err("Can't annotate %s: No vmlinux file was found in the "
 116                        "path\n", sym->name);
 117                 sleep(1);
 118                 return -1;
 119         }
 120
 121         notes = symbol__annotation(sym);
 122         if (notes->src != NULL) {
 123                 pthread_mutex_lock(&notes->lock);
 124                 goto out_assign;
 125         }
 126
 127         pthread_mutex_lock(&notes->lock);
 128
 129         if (symbol__alloc_hist(sym) < 0) {
 130                 pthread_mutex_unlock(&notes->lock);
 131                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 132                        sym->name);
 133                 sleep(1);
 134                 return err;
 135         }
 136
 137         err = symbol__disassemble(sym, map, 0);
 138         if (err == 0) {
 139 out_assign:
 140                 top->sym_filter_entry = he;
 141         } else {
 142                 char msg[BUFSIZ];
 143                 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
 144                 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
 145         }
 146
 147         pthread_mutex_unlock(&notes->lock);
 148         return err;
 149 }
 150
 151 static void __zero_source_counters(struct hist_entry *he)
 152 {
 153         struct symbol *sym = he->ms.sym;
 154         symbol__annotate_zero_histograms(sym);
 155 }
 156
 157 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
 158 {
 159         struct utsname uts;
 160         int err = uname(&uts);
 161
 162         ui__warning("Out of bounds address found:\n\n"
 163                     "Addr:   %" PRIx64 "\n"
 164                     "DSO:    %s %c\n"
 165                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
 166                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
 167                     "Arch:   %s\n"
 168                     "Kernel: %s\n"
 169                     "Tools:  %s\n\n"
 170                     "Not all samples will be on the annotation output.\n\n"
 171                     "Please report to linux-kernel@vger.kernel.org\n",
 172                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
 173                     map->start, map->end, sym->start, sym->end,
 174                     sym->binding == STB_GLOBAL ? 'g' :
 175                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
 176                     err ? "[unknown]" : uts.machine,
 177                     err ? "[unknown]" : uts.release, perf_version_string);
 178         if (use_browser <= 0)
 179                 sleep(5);
 180
 181         map->erange_warned = true;
 182 }
 183
 184 static void perf_top__record_precise_ip(struct perf_top *top,
 185                                         struct hist_entry *he,
 186                                         int counter, u64 ip)
 187 {
 188         struct annotation *notes;
 189         struct symbol *sym = he->ms.sym;
 190         int err = 0;
 191
 192         if (sym == NULL || (use_browser == 0 &&
 193                             (top->sym_filter_entry == NULL ||
 194                              top->sym_filter_entry->ms.sym != sym)))
 195                 return;
 196
 197         notes = symbol__annotation(sym);
 198
 199         if (pthread_mutex_trylock(&notes->lock))
 200                 return;
 201
 202         err = hist_entry__inc_addr_samples(he, counter, ip);
 203
 204         pthread_mutex_unlock(&notes->lock);
 205
 206         if (unlikely(err)) {
 207                 /*
 208                  * This function is now called with he->hists->lock held.
 209                  * Release it before going to sleep.
 210                  */
 211                 pthread_mutex_unlock(&he->hists->lock);
 212
 213                 if (err == -ERANGE && !he->ms.map->erange_warned)
 214                         ui__warn_map_erange(he->ms.map, sym, ip);
 215                 else if (err == -ENOMEM) {
 216                         pr_err("Not enough memory for annotating '%s' symbol!\n",
 217                                sym->name);
 218                         sleep(1);
 219                 }
 220
 221                 pthread_mutex_lock(&he->hists->lock);
 222         }
 223 }
 224
 225 static void perf_top__show_details(struct perf_top *top)
 226 {
 227         struct hist_entry *he = top->sym_filter_entry;
 228         struct annotation *notes;
 229         struct symbol *symbol;
 230         int more;
 231
 232         if (!he)
 233                 return;
 234
 235         symbol = he->ms.sym;
 236         notes = symbol__annotation(symbol);
 237
 238         pthread_mutex_lock(&notes->lock);
 239
 240         if (notes->src == NULL)
 241                 goto out_unlock;
 242
 243         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
 244         printf("  Events  Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
 245
 246         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
 247                                        0, top->sym_pcnt_filter, top->print_entries, 4);
 248
 249         if (top->evlist->enabled) {
 250                 if (top->zero)
 251                         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
 252                 else
 253                         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
 254         }
 255         if (more != 0)
 256                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 257 out_unlock:
 258         pthread_mutex_unlock(&notes->lock);
 259 }
 260
 261 static void perf_top__print_sym_table(struct perf_top *top)
 262 {
 263         char bf[160];
 264         int printed = 0;
 265         const int win_width = top->winsize.ws_col - 1;
 266         struct perf_evsel *evsel = top->sym_evsel;
 267         struct hists *hists = evsel__hists(evsel);
 268
 269         puts(CONSOLE_CLEAR);
 270
 271         perf_top__header_snprintf(top, bf, sizeof(bf));
 272         printf("%s\n", bf);
 273
 274         perf_top__reset_sample_counters(top);
 275
 276         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 277
 278         if (hists->stats.nr_lost_warned !=
 279             hists->stats.nr_events[PERF_RECORD_LOST]) {
 280                 hists->stats.nr_lost_warned =
 281                               hists->stats.nr_events[PERF_RECORD_LOST];
 282                 color_fprintf(stdout, PERF_COLOR_RED,
 283                               "WARNING: LOST %d chunks, Check IO/CPU overload",
 284                               hists->stats.nr_lost_warned);
 285                 ++printed;
 286         }
 287
 288         if (top->sym_filter_entry) {
 289                 perf_top__show_details(top);
 290                 return;
 291         }
 292
 293         if (top->evlist->enabled) {
 294                 if (top->zero) {
 295                         hists__delete_entries(hists);
 296                 } else {
 297                         hists__decay_entries(hists, top->hide_user_symbols,
 298                                              top->hide_kernel_symbols);
 299                 }
 300         }
 301
 302         hists__collapse_resort(hists, NULL);
 303         perf_evsel__output_resort(evsel, NULL);
 304
 305         hists__output_recalc_col_len(hists, top->print_entries - printed);
 306         putchar('\n');
 307         hists__fprintf(hists, false, top->print_entries - printed, win_width,
 308                        top->min_percent, stdout, symbol_conf.use_callchain);
 309 }
 310
 311 static void prompt_integer(int *target, const char *msg)
 312 {
 313         char *buf = malloc(0), *p;
 314         size_t dummy = 0;
 315         int tmp;
 316
 317         fprintf(stdout, "\n%s: ", msg);
 318         if (getline(&buf, &dummy, stdin) < 0)
 319                 return;
 320
 321         p = strchr(buf, '\n');
 322         if (p)
 323                 *p = 0;
 324
 325         p = buf;
 326         while(*p) {
 327                 if (!isdigit(*p))
 328                         goto out_free;
 329                 p++;
 330         }
 331         tmp = strtoul(buf, NULL, 10);
 332         *target = tmp;
 333 out_free:
 334         free(buf);
 335 }
 336
 337 static void prompt_percent(int *target, const char *msg)
 338 {
 339         int tmp = 0;
 340
 341         prompt_integer(&tmp, msg);
 342         if (tmp >= 0 && tmp <= 100)
 343                 *target = tmp;
 344 }
 345
 346 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 347 {
 348         char *buf = malloc(0), *p;
 349         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 350         struct hists *hists = evsel__hists(top->sym_evsel);
 351         struct rb_node *next;
 352         size_t dummy = 0;
 353
 354         /* zero counters of active symbol */
 355         if (syme) {
 356                 __zero_source_counters(syme);
 357                 top->sym_filter_entry = NULL;
 358         }
 359
 360         fprintf(stdout, "\n%s: ", msg);
 361         if (getline(&buf, &dummy, stdin) < 0)
 362                 goto out_free;
 363
 364         p = strchr(buf, '\n');
 365         if (p)
 366                 *p = 0;
 367
 368         next = rb_first(&hists->entries);
 369         while (next) {
 370                 n = rb_entry(next, struct hist_entry, rb_node);
 371                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
 372                         found = n;
 373                         break;
 374                 }
 375                 next = rb_next(&n->rb_node);
 376         }
 377
 378         if (!found) {
 379                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 380                 sleep(1);
 381         } else
 382                 perf_top__parse_source(top, found);
 383
 384 out_free:
 385         free(buf);
 386 }
 387
 388 static void perf_top__print_mapped_keys(struct perf_top *top)
 389 {
 390         char *name = NULL;
 391
 392         if (top->sym_filter_entry) {
 393                 struct symbol *sym = top->sym_filter_entry->ms.sym;
 394                 name = sym->name;
 395         }
 396
 397         fprintf(stdout, "\nMapped keys:\n");
 398         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
 399         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
 400
 401         if (top->evlist->nr_entries > 1)
 402                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
 403
 404         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
 405
 406         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
 407         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 408         fprintf(stdout, "\t[S]     stop annotation.\n");
 409
 410         fprintf(stdout,
 411                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 412                 top->hide_kernel_symbols ? "yes" : "no");
 413         fprintf(stdout,
 414                 "\t[U]     hide user symbols.               \t(%s)\n",
 415                 top->hide_user_symbols ? "yes" : "no");
 416         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
 417         fprintf(stdout, "\t[qQ]    quit.\n");
 418 }
 419
 420 static int perf_top__key_mapped(struct perf_top *top, int c)
 421 {
 422         switch (c) {
 423                 case 'd':
 424                 case 'e':
 425                 case 'f':
 426                 case 'z':
 427                 case 'q':
 428                 case 'Q':
 429                 case 'K':
 430                 case 'U':
 431                 case 'F':
 432                 case 's':
 433                 case 'S':
 434                         return 1;
 435                 case 'E':
 436                         return top->evlist->nr_entries > 1 ? 1 : 0;
 437                 default:
 438                         break;
 439         }
 440
 441         return 0;
 442 }
 443
 444 static bool perf_top__handle_keypress(struct perf_top *top, int c)
 445 {
 446         bool ret = true;
 447
 448         if (!perf_top__key_mapped(top, c)) {
 449                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 450                 struct termios save;
 451
 452                 perf_top__print_mapped_keys(top);
 453                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 454                 fflush(stdout);
 455
 456                 set_term_quiet_input(&save);
 457
 458                 poll(&stdin_poll, 1, -1);
 459                 c = getc(stdin);
 460
 461                 tcsetattr(0, TCSAFLUSH, &save);
 462                 if (!perf_top__key_mapped(top, c))
 463                         return ret;
 464         }
 465
 466         switch (c) {
 467                 case 'd':
 468                         prompt_integer(&top->delay_secs, "Enter display delay");
 469                         if (top->delay_secs < 1)
 470                                 top->delay_secs = 1;
 471                         break;
 472                 case 'e':
 473                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
 474                         if (top->print_entries == 0) {
 475                                 struct sigaction act = {
 476                                         .sa_sigaction = perf_top__sig_winch,
 477                                         .sa_flags     = SA_SIGINFO,
 478                                 };
 479                                 perf_top__resize(top);
 480                                 sigaction(SIGWINCH, &act, NULL);
 481                         } else {
 482                                 signal(SIGWINCH, SIG_DFL);
 483                         }
 484                         break;
 485                 case 'E':
 486                         if (top->evlist->nr_entries > 1) {
 487                                 /* Select 0 as the default event: */
 488                                 int counter = 0;
 489
 490                                 fprintf(stderr, "\nAvailable events:");
 491
 492                                 evlist__for_each_entry(top->evlist, top->sym_evsel)
 493                                         fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
 494
 495                                 prompt_integer(&counter, "Enter details event counter");
 496
 497                                 if (counter >= top->evlist->nr_entries) {
 498                                         top->sym_evsel = perf_evlist__first(top->evlist);
 499                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
 500                                         sleep(1);
 501                                         break;
 502                                 }
 503                                 evlist__for_each_entry(top->evlist, top->sym_evsel)
 504                                         if (top->sym_evsel->idx == counter)
 505                                                 break;
 506                         } else
 507                                 top->sym_evsel = perf_evlist__first(top->evlist);
 508                         break;
 509                 case 'f':
 510                         prompt_integer(&top->count_filter, "Enter display event count filter");
 511                         break;
 512                 case 'F':
 513                         prompt_percent(&top->sym_pcnt_filter,
 514                                        "Enter details display event filter (percent)");
 515                         break;
 516                 case 'K':
 517                         top->hide_kernel_symbols = !top->hide_kernel_symbols;
 518                         break;
 519                 case 'q':
 520                 case 'Q':
 521                         printf("exiting.\n");
 522                         if (top->dump_symtab)
 523                                 perf_session__fprintf_dsos(top->session, stderr);
 524                         ret = false;
 525                         break;
 526                 case 's':
 527                         perf_top__prompt_symbol(top, "Enter details symbol");
 528                         break;
 529                 case 'S':
 530                         if (!top->sym_filter_entry)
 531                                 break;
 532                         else {
 533                                 struct hist_entry *syme = top->sym_filter_entry;
 534
 535                                 top->sym_filter_entry = NULL;
 536                                 __zero_source_counters(syme);
 537                         }
 538                         break;
 539                 case 'U':
 540                         top->hide_user_symbols = !top->hide_user_symbols;
 541                         break;
 542                 case 'z':
 543                         top->zero = !top->zero;
 544                         break;
 545                 default:
 546                         break;
 547         }
 548
 549         return ret;
 550 }
 551
 552 static void perf_top__sort_new_samples(void *arg)
 553 {
 554         struct perf_top *t = arg;
 555         struct perf_evsel *evsel = t->sym_evsel;
 556         struct hists *hists;
 557
 558         perf_top__reset_sample_counters(t);
 559
 560         if (t->evlist->selected != NULL)
 561                 t->sym_evsel = t->evlist->selected;
 562
 563         hists = evsel__hists(evsel);
 564
 565         if (t->evlist->enabled) {
 566                 if (t->zero) {
 567                         hists__delete_entries(hists);
 568                 } else {
 569                         hists__decay_entries(hists, t->hide_user_symbols,
 570                                              t->hide_kernel_symbols);
 571                 }
 572         }
 573
 574         hists__collapse_resort(hists, NULL);
 575         perf_evsel__output_resort(evsel, NULL);
 576 }
 577
 578 static void *display_thread_tui(void *arg)
 579 {
 580         struct perf_evsel *pos;
 581         struct perf_top *top = arg;
 582         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
 583         struct hist_browser_timer hbt = {
 584                 .timer          = perf_top__sort_new_samples,
 585                 .arg            = top,
 586                 .refresh        = top->delay_secs,
 587         };
 588
 589         perf_top__sort_new_samples(top);
 590
 591         /*
 592          * Initialize the uid_filter_str, in the future the TUI will allow
 593          * Zooming in/out UIDs. For now juse use whatever the user passed
 594          * via --uid.
 595          */
 596         evlist__for_each_entry(top->evlist, pos) {
 597                 struct hists *hists = evsel__hists(pos);
 598                 hists->uid_filter_str = top->record_opts.target.uid_str;
 599         }
 600
 601         perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
 602                                       top->min_percent,
 603                                       &top->session->header.env);
 604
 605         done = 1;
 606         return NULL;
 607 }
 608
 609 static void display_sig(int sig __maybe_unused)
 610 {
 611         done = 1;
 612 }
 613
 614 static void display_setup_sig(void)
 615 {
 616         signal(SIGSEGV, sighandler_dump_stack);
 617         signal(SIGFPE, sighandler_dump_stack);
 618         signal(SIGINT,  display_sig);
 619         signal(SIGQUIT, display_sig);
 620         signal(SIGTERM, display_sig);
 621 }
 622
 623 static void *display_thread(void *arg)
 624 {
 625         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 626         struct termios save;
 627         struct perf_top *top = arg;
 628         int delay_msecs, c;
 629
 630         display_setup_sig();
 631         pthread__unblock_sigwinch();
 632 repeat:
 633         delay_msecs = top->delay_secs * MSEC_PER_SEC;
 634         set_term_quiet_input(&save);
 635         /* trash return*/
 636         getc(stdin);
 637
 638         while (!done) {
 639                 perf_top__print_sym_table(top);
 640                 /*
 641                  * Either timeout expired or we got an EINTR due to SIGWINCH,
 642                  * refresh screen in both cases.
 643                  */
 644                 switch (poll(&stdin_poll, 1, delay_msecs)) {
 645                 case 0:
 646                         continue;
 647                 case -1:
 648                         if (errno == EINTR)
 649                                 continue;
 650                         __fallthrough;
 651                 default:
 652                         c = getc(stdin);
 653                         tcsetattr(0, TCSAFLUSH, &save);
 654
 655                         if (perf_top__handle_keypress(top, c))
 656                                 goto repeat;
 657                         done = 1;
 658                 }
 659         }
 660
 661         tcsetattr(0, TCSAFLUSH, &save);
 662         return NULL;
 663 }
 664
 665 static int hist_iter__top_callback(struct hist_entry_iter *iter,
 666                                    struct addr_location *al, bool single,
 667                                    void *arg)
 668 {
 669         struct perf_top *top = arg;
 670         struct hist_entry *he = iter->he;
 671         struct perf_evsel *evsel = iter->evsel;
 672
 673         if (perf_hpp_list.sym && single)
 674                 perf_top__record_precise_ip(top, he, evsel->idx, al->addr);
 675
 676         hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
 677                      !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
 678         return 0;
 679 }
 680
 681 static void perf_event__process_sample(struct perf_tool *tool,
 682                                        const union perf_event *event,
 683                                        struct perf_evsel *evsel,
 684                                        struct perf_sample *sample,
 685                                        struct machine *machine)
 686 {
 687         struct perf_top *top = container_of(tool, struct perf_top, tool);
 688         struct addr_location al;
 689         int err;
 690
 691         if (!machine && perf_guest) {
 692                 static struct intlist *seen;
 693
 694                 if (!seen)
 695                         seen = intlist__new(NULL);
 696
 697                 if (!intlist__has_entry(seen, sample->pid)) {
 698                         pr_err("Can't find guest [%d]'s kernel information\n",
 699                                 sample->pid);
 700                         intlist__add(seen, sample->pid);
 701                 }
 702                 return;
 703         }
 704
 705         if (!machine) {
 706                 pr_err("%u unprocessable samples recorded.\r",
 707                        top->session->evlist->stats.nr_unprocessable_samples++);
 708                 return;
 709         }
 710
 711         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
 712                 top->exact_samples++;
 713
 714         if (machine__resolve(machine, &al, sample) < 0)
 715                 return;
 716
 717         if (!machine->kptr_restrict_warned &&
 718             symbol_conf.kptr_restrict &&
 719             al.cpumode == PERF_RECORD_MISC_KERNEL) {
 720                 ui__warning(
 721 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 722 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 723 "Kernel%s samples will not be resolved.\n",
 724                           al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
 725                           " modules" : "");
 726                 if (use_browser <= 0)
 727                         sleep(5);
 728                 machine->kptr_restrict_warned = true;
 729         }
 730
 731         if (al.sym == NULL) {
 732                 const char *msg = "Kernel samples will not be resolved.\n";
 733                 /*
 734                  * As we do lazy loading of symtabs we only will know if the
 735                  * specified vmlinux file is invalid when we actually have a
 736                  * hit in kernel space and then try to load it. So if we get
 737                  * here and there are _no_ symbols in the DSO backing the
 738                  * kernel map, bail out.
 739                  *
 740                  * We may never get here, for instance, if we use -K/
 741                  * --hide-kernel-symbols, even if the user specifies an
 742                  * invalid --vmlinux ;-)
 743                  */
 744                 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
 745                     al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
 746                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
 747                         if (symbol_conf.vmlinux_name) {
 748                                 char serr[256];
 749                                 dso__strerror_load(al.map->dso, serr, sizeof(serr));
 750                                 ui__warning("The %s file can't be used: %s\n%s",
 751                                             symbol_conf.vmlinux_name, serr, msg);
 752                         } else {
 753                                 ui__warning("A vmlinux file was not found.\n%s",
 754                                             msg);
 755                         }
 756
 757                         if (use_browser <= 0)
 758                                 sleep(5);
 759                         top->vmlinux_warned = true;
 760                 }
 761         }
 762
 763         if (al.sym == NULL || !al.sym->idle) {
 764                 struct hists *hists = evsel__hists(evsel);
 765                 struct hist_entry_iter iter = {
 766                         .evsel          = evsel,
 767                         .sample         = sample,
 768                         .add_entry_cb   = hist_iter__top_callback,
 769                 };
 770
 771                 if (symbol_conf.cumulate_callchain)
 772                         iter.ops = &hist_iter_cumulative;
 773                 else
 774                         iter.ops = &hist_iter_normal;
 775
 776                 pthread_mutex_lock(&hists->lock);
 777
 778                 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
 779                 if (err < 0)
 780                         pr_err("Problem incrementing symbol period, skipping event\n");
 781
 782                 pthread_mutex_unlock(&hists->lock);
 783         }
 784
 785         addr_location__put(&al);
 786 }
 787
 788 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 789 {
 790         struct perf_sample sample;
 791         struct perf_evsel *evsel;
 792         struct perf_session *session = top->session;
 793         union perf_event *event;
 794         struct machine *machine;
 795         int ret;
 796
 797         while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
 798                 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
 799                 if (ret) {
 800                         pr_err("Can't parse sample, err = %d\n", ret);
 801                         goto next_event;
 802                 }
 803
 804                 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
 805                 assert(evsel != NULL);
 806
 807                 if (event->header.type == PERF_RECORD_SAMPLE)
 808                         ++top->samples;
 809
 810                 switch (sample.cpumode) {
 811                 case PERF_RECORD_MISC_USER:
 812                         ++top->us_samples;
 813                         if (top->hide_user_symbols)
 814                                 goto next_event;
 815                         machine = &session->machines.host;
 816                         break;
 817                 case PERF_RECORD_MISC_KERNEL:
 818                         ++top->kernel_samples;
 819                         if (top->hide_kernel_symbols)
 820                                 goto next_event;
 821                         machine = &session->machines.host;
 822                         break;
 823                 case PERF_RECORD_MISC_GUEST_KERNEL:
 824                         ++top->guest_kernel_samples;
 825                         machine = perf_session__find_machine(session,
 826                                                              sample.pid);
 827                         break;
 828                 case PERF_RECORD_MISC_GUEST_USER:
 829                         ++top->guest_us_samples;
 830                         /*
 831                          * TODO: we don't process guest user from host side
 832                          * except simple counting.
 833                          */
 834                         goto next_event;
 835                 default:
 836                         if (event->header.type == PERF_RECORD_SAMPLE)
 837                                 goto next_event;
 838                         machine = &session->machines.host;
 839                         break;
 840                 }
 841
 842
 843                 if (event->header.type == PERF_RECORD_SAMPLE) {
 844                         perf_event__process_sample(&top->tool, event, evsel,
 845                                                    &sample, machine);
 846                 } else if (event->header.type < PERF_RECORD_MAX) {
 847                         hists__inc_nr_events(evsel__hists(evsel), event->header.type);
 848                         machine__process_event(machine, event, &sample);
 849                 } else
 850                         ++session->evlist->stats.nr_unknown_events;
 851 next_event:
 852                 perf_evlist__mmap_consume(top->evlist, idx);
 853         }
 854 }
 855
 856 static void perf_top__mmap_read(struct perf_top *top)
 857 {
 858         int i;
 859
 860         for (i = 0; i < top->evlist->nr_mmaps; i++)
 861                 perf_top__mmap_read_idx(top, i);
 862 }
 863
 864 static int perf_top__start_counters(struct perf_top *top)
 865 {
 866         char msg[512];
 867         struct perf_evsel *counter;
 868         struct perf_evlist *evlist = top->evlist;
 869         struct record_opts *opts = &top->record_opts;
 870
 871         perf_evlist__config(evlist, opts, &callchain_param);
 872
 873         evlist__for_each_entry(evlist, counter) {
 874 try_again:
 875                 if (perf_evsel__open(counter, top->evlist->cpus,
 876                                      top->evlist->threads) < 0) {
 877                         if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 878                                 if (verbose)
 879                                         ui__warning("%s\n", msg);
 880                                 goto try_again;
 881                         }
 882
 883                         perf_evsel__open_strerror(counter, &opts->target,
 884                                                   errno, msg, sizeof(msg));
 885                         ui__error("%s\n", msg);
 886                         goto out_err;
 887                 }
 888         }
 889
 890         if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
 891                 ui__error("Failed to mmap with %d (%s)\n",
 892                             errno, str_error_r(errno, msg, sizeof(msg)));
 893                 goto out_err;
 894         }
 895
 896         return 0;
 897
 898 out_err:
 899         return -1;
 900 }
 901
 902 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
 903 {
 904         if (!perf_hpp_list.sym) {
 905                 if (callchain->enabled) {
 906                         ui__error("Selected -g but \"sym\" not present in --sort/-s.");
 907                         return -EINVAL;
 908                 }
 909         } else if (callchain->mode != CHAIN_NONE) {
 910                 if (callchain_register_param(callchain) < 0) {
 911                         ui__error("Can't register callchain params.\n");
 912                         return -EINVAL;
 913                 }
 914         }
 915
 916         return 0;
 917 }
 918
 919 static int __cmd_top(struct perf_top *top)
 920 {
 921         char msg[512];
 922         struct perf_evsel *pos;
 923         struct perf_evsel_config_term *err_term;
 924         struct perf_evlist *evlist = top->evlist;
 925         struct record_opts *opts = &top->record_opts;
 926         pthread_t thread;
 927         int ret;
 928
 929         top->session = perf_session__new(NULL, false, NULL);
 930         if (top->session == NULL)
 931                 return -1;
 932
 933         if (!objdump_path) {
 934                 ret = perf_env__lookup_objdump(&top->session->header.env);
 935                 if (ret)
 936                         goto out_delete;
 937         }
 938
 939         ret = callchain_param__setup_sample_type(&callchain_param);
 940         if (ret)
 941                 goto out_delete;
 942
 943         if (perf_session__register_idle_thread(top->session) < 0)
 944                 goto out_delete;
 945
 946         machine__synthesize_threads(&top->session->machines.host, &opts->target,
 947                                     top->evlist->threads, false, opts->proc_map_timeout);
 948
 949         if (perf_hpp_list.socket) {
 950                 ret = perf_env__read_cpu_topology_map(&perf_env);
 951                 if (ret < 0)
 952                         goto out_err_cpu_topo;
 953         }
 954
 955         ret = perf_top__start_counters(top);
 956         if (ret)
 957                 goto out_delete;
 958
 959         ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term);
 960         if (ret) {
 961                 error("failed to set config \"%s\" on event %s with %d (%s)\n",
 962                         err_term->val.drv_cfg, perf_evsel__name(pos), errno,
 963                         str_error_r(errno, msg, sizeof(msg)));
 964                 goto out_delete;
 965         }
 966
 967         top->session->evlist = top->evlist;
 968         perf_session__set_id_hdr_size(top->session);
 969
 970         /*
 971          * When perf is starting the traced process, all the events (apart from
 972          * group members) have enable_on_exec=1 set, so don't spoil it by
 973          * prematurely enabling them.
 974          *
 975          * XXX 'top' still doesn't start workloads like record, trace, but should,
 976          * so leave the check here.
 977          */
 978         if (!target__none(&opts->target))
 979                 perf_evlist__enable(top->evlist);
 980
 981         /* Wait for a minimal set of events before starting the snapshot */
 982         perf_evlist__poll(top->evlist, 100);
 983
 984         perf_top__mmap_read(top);
 985
 986         ret = -1;
 987         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
 988                                                             display_thread), top)) {
 989                 ui__error("Could not create display thread.\n");
 990                 goto out_delete;
 991         }
 992
 993         if (top->realtime_prio) {
 994                 struct sched_param param;
 995
 996                 param.sched_priority = top->realtime_prio;
 997                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
 998                         ui__error("Could not set realtime priority.\n");
 999                         goto out_join;
1000                 }
1001         }
1002
1003         while (!done) {
1004                 u64 hits = top->samples;
1005
1006                 perf_top__mmap_read(top);
1007
1008                 if (hits == top->samples)
1009                         ret = perf_evlist__poll(top->evlist, 100);
1010
1011                 if (resize) {
1012                         perf_top__resize(top);
1013                         resize = 0;
1014                 }
1015         }
1016
1017         ret = 0;
1018 out_join:
1019         pthread_join(thread, NULL);
1020 out_delete:
1021         perf_session__delete(top->session);
1022         top->session = NULL;
1023
1024         return ret;
1025
1026 out_err_cpu_topo: {
1027         char errbuf[BUFSIZ];
1028         const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1029
1030         ui__error("Could not read the CPU topology map: %s\n", err);
1031         goto out_delete;
1032 }
1033 }
1034
1035 static int
1036 callchain_opt(const struct option *opt, const char *arg, int unset)
1037 {
1038         symbol_conf.use_callchain = true;
1039         return record_callchain_opt(opt, arg, unset);
1040 }
1041
1042 static int
1043 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1044 {
1045         struct callchain_param *callchain = opt->value;
1046
1047         callchain->enabled = !unset;
1048         callchain->record_mode = CALLCHAIN_FP;
1049
1050         /*
1051          * --no-call-graph
1052          */
1053         if (unset) {
1054                 symbol_conf.use_callchain = false;
1055                 callchain->record_mode = CALLCHAIN_NONE;
1056                 return 0;
1057         }
1058
1059         return parse_callchain_top_opt(arg);
1060 }
1061
1062 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1063 {
1064         if (!strcmp(var, "top.call-graph")) {
1065                 var = "call-graph.record-mode";
1066                 return perf_default_config(var, value, cb);
1067         }
1068         if (!strcmp(var, "top.children")) {
1069                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1070                 return 0;
1071         }
1072
1073         return 0;
1074 }
1075
1076 static int
1077 parse_percent_limit(const struct option *opt, const char *arg,
1078                     int unset __maybe_unused)
1079 {
1080         struct perf_top *top = opt->value;
1081
1082         top->min_percent = strtof(arg, NULL);
1083         return 0;
1084 }
1085
1086 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1087         "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1088
1089 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1090 {
1091         char errbuf[BUFSIZ];
1092         struct perf_top top = {
1093                 .count_filter        = 5,
1094                 .delay_secs          = 2,
1095                 .record_opts = {
1096                         .mmap_pages     = UINT_MAX,
1097                         .user_freq      = UINT_MAX,
1098                         .user_interval  = ULLONG_MAX,
1099                         .freq           = 4000, /* 4 KHz */
1100                         .target         = {
1101                                 .uses_mmap   = true,
1102                         },
1103                         .proc_map_timeout    = 500,
1104                 },
1105                 .max_stack           = sysctl_perf_event_max_stack,
1106                 .sym_pcnt_filter     = 5,
1107         };
1108         struct record_opts *opts = &top.record_opts;
1109         struct target *target = &opts->target;
1110         const struct option options[] = {
1111         OPT_CALLBACK('e', "event", &top.evlist, "event",
1112                      "event selector. use 'perf list' to list available events",
1113                      parse_events_option),
1114         OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1115         OPT_STRING('p', "pid", &target->pid, "pid",
1116                     "profile events on existing process id"),
1117         OPT_STRING('t', "tid", &target->tid, "tid",
1118                     "profile events on existing thread id"),
1119         OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1120                             "system-wide collection from all CPUs"),
1121         OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1122                     "list of cpus to monitor"),
1123         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1124                    "file", "vmlinux pathname"),
1125         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1126                     "don't load vmlinux even if found"),
1127         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1128                     "hide kernel symbols"),
1129         OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1130                      "number of mmap data pages",
1131                      perf_evlist__parse_mmap_pages),
1132         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1133                     "collect data with this RT SCHED_FIFO priority"),
1134         OPT_INTEGER('d', "delay", &top.delay_secs,
1135                     "number of seconds to delay between refreshes"),
1136         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1137                             "dump the symbol table used for profiling"),
1138         OPT_INTEGER('f', "count-filter", &top.count_filter,
1139                     "only display functions with more events than this"),
1140         OPT_BOOLEAN(0, "group", &opts->group,
1141                             "put the counters into a counter group"),
1142         OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1143                     "child tasks do not inherit counters"),
1144         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1145                     "symbol to annotate"),
1146         OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1147         OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1148         OPT_INTEGER('E', "entries", &top.print_entries,
1149                     "display this many functions"),
1150         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1151                     "hide user symbols"),
1152         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1153         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1154         OPT_INCR('v', "verbose", &verbose,
1155                     "be more verbose (show counter open errors, etc)"),
1156         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1157                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1158                    " Please refer the man page for the complete list."),
1159         OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1160                    "output field(s): overhead, period, sample plus all of sort keys"),
1161         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1162                     "Show a column with the number of samples"),
1163         OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1164                            NULL, "enables call-graph recording and display",
1165                            &callchain_opt),
1166         OPT_CALLBACK(0, "call-graph", &callchain_param,
1167                      "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1168                      top_callchain_help, &parse_callchain_opt),
1169         OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1170                     "Accumulate callchains of children and show total overhead as well"),
1171         OPT_INTEGER(0, "max-stack", &top.max_stack,
1172                     "Set the maximum stack depth when parsing the callchain. "
1173                     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1174         OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1175                    "ignore callees of these functions in call graphs",
1176                    report_parse_ignore_callees_opt),
1177         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1178                     "Show a column with the sum of periods"),
1179         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1180                    "only consider symbols in these dsos"),
1181         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1182                    "only consider symbols in these comms"),
1183         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1184                    "only consider these symbols"),
1185         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1186                     "Interleave source code with assembly code (default)"),
1187         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1188                     "Display raw encoding of assembly instructions (default)"),
1189         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1190                     "Enable kernel symbol demangling"),
1191         OPT_STRING(0, "objdump", &objdump_path, "path",
1192                     "objdump binary to use for disassembly and annotations"),
1193         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1194                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1195         OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1196         OPT_CALLBACK(0, "percent-limit", &top, "percent",
1197                      "Don't show entries under that percent", parse_percent_limit),
1198         OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1199                      "How to display percentage of filtered entries", parse_filter_percentage),
1200         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1201                    "width[,width...]",
1202                    "don't try to adjust column width, use these fixed values"),
1203         OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1204                         "per thread proc mmap processing timeout in ms"),
1205         OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1206                      "branch any", "sample any taken branches",
1207                      parse_branch_stack),
1208         OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1209                      "branch filter mask", "branch stack filter modes",
1210                      parse_branch_stack),
1211         OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1212                     "Show raw trace event output (do not use print fmt or plugins)"),
1213         OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1214                     "Show entries in a hierarchy"),
1215         OPT_END()
1216         };
1217         const char * const top_usage[] = {
1218                 "perf top [<options>]",
1219                 NULL
1220         };
1221         int status = hists__init();
1222
1223         if (status < 0)
1224                 return status;
1225
1226         top.evlist = perf_evlist__new();
1227         if (top.evlist == NULL)
1228                 return -ENOMEM;
1229
1230         perf_config(perf_top_config, &top);
1231
1232         argc = parse_options(argc, argv, options, top_usage, 0);
1233         if (argc)
1234                 usage_with_options(top_usage, options);
1235
1236         if (!top.evlist->nr_entries &&
1237             perf_evlist__add_default(top.evlist) < 0) {
1238                 pr_err("Not enough memory for event selector list\n");
1239                 goto out_delete_evlist;
1240         }
1241
1242         if (symbol_conf.report_hierarchy) {
1243                 /* disable incompatible options */
1244                 symbol_conf.event_group = false;
1245                 symbol_conf.cumulate_callchain = false;
1246
1247                 if (field_order) {
1248                         pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1249                         parse_options_usage(top_usage, options, "fields", 0);
1250                         parse_options_usage(NULL, options, "hierarchy", 0);
1251                         goto out_delete_evlist;
1252                 }
1253         }
1254
1255         sort__mode = SORT_MODE__TOP;
1256         /* display thread wants entries to be collapsed in a different tree */
1257         perf_hpp_list.need_collapse = 1;
1258
1259         if (top.use_stdio)
1260                 use_browser = 0;
1261         else if (top.use_tui)
1262                 use_browser = 1;
1263
1264         setup_browser(false);
1265
1266         if (setup_sorting(top.evlist) < 0) {
1267                 if (sort_order)
1268                         parse_options_usage(top_usage, options, "s", 1);
1269                 if (field_order)
1270                         parse_options_usage(sort_order ? NULL : top_usage,
1271                                             options, "fields", 0);
1272                 goto out_delete_evlist;
1273         }
1274
1275         status = target__validate(target);
1276         if (status) {
1277                 target__strerror(target, status, errbuf, BUFSIZ);
1278                 ui__warning("%s\n", errbuf);
1279         }
1280
1281         status = target__parse_uid(target);
1282         if (status) {
1283                 int saved_errno = errno;
1284
1285                 target__strerror(target, status, errbuf, BUFSIZ);
1286                 ui__error("%s\n", errbuf);
1287
1288                 status = -saved_errno;
1289                 goto out_delete_evlist;
1290         }
1291
1292         if (target__none(target))
1293                 target->system_wide = true;
1294
1295         if (perf_evlist__create_maps(top.evlist, target) < 0) {
1296                 ui__error("Couldn't create thread/CPU maps: %s\n",
1297                           errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1298                 goto out_delete_evlist;
1299         }
1300
1301         symbol_conf.nr_events = top.evlist->nr_entries;
1302
1303         if (top.delay_secs < 1)
1304                 top.delay_secs = 1;
1305
1306         if (record_opts__config(opts)) {
1307                 status = -EINVAL;
1308                 goto out_delete_evlist;
1309         }
1310
1311         top.sym_evsel = perf_evlist__first(top.evlist);
1312
1313         if (!callchain_param.enabled) {
1314                 symbol_conf.cumulate_callchain = false;
1315                 perf_hpp__cancel_cumulate();
1316         }
1317
1318         if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1319                 callchain_param.order = ORDER_CALLER;
1320
1321         status = symbol__annotation_init();
1322         if (status < 0)
1323                 goto out_delete_evlist;
1324
1325         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1326         if (symbol__init(NULL) < 0)
1327                 return -1;
1328
1329         sort__setup_elide(stdout);
1330
1331         get_term_dimensions(&top.winsize);
1332         if (top.print_entries == 0) {
1333                 struct sigaction act = {
1334                         .sa_sigaction = perf_top__sig_winch,
1335                         .sa_flags     = SA_SIGINFO,
1336                 };
1337                 perf_top__update_print_entries(&top);
1338                 sigaction(SIGWINCH, &act, NULL);
1339         }
1340
1341         status = __cmd_top(&top);
1342
1343 out_delete_evlist:
1344         perf_evlist__delete(top.evlist);
1345
1346         return status;
1347 }