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