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/event.h"
  31 #include "util/machine.h"
  32 #include "util/session.h"
  33 #include "util/symbol.h"
  34 #include "util/thread.h"
  35 #include "util/thread_map.h"
  36 #include "util/top.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/term.h"
  44 #include "util/intlist.h"
  45 #include "util/parse-branch-options.h"
  46 #include "arch/common.h"
  47
  48 #include "util/debug.h"
  49
  50 #include <assert.h>
  51 #include <elf.h>
  52 #include <fcntl.h>
  53
  54 #include <stdio.h>
  55 #include <termios.h>
  56 #include <unistd.h>
  57 #include <inttypes.h>
  58
  59 #include <errno.h>
  60 #include <time.h>
  61 #include <sched.h>
  62 #include <signal.h>
  63
  64 #include <sys/syscall.h>
  65 #include <sys/ioctl.h>
  66 #include <poll.h>
  67 #include <sys/prctl.h>
  68 #include <sys/wait.h>
  69 #include <sys/uio.h>
  70 #include <sys/utsname.h>
  71 #include <sys/mman.h>
  72
  73 #include <linux/stringify.h>
  74 #include <linux/time64.h>
  75 #include <linux/types.h>
  76
  77 #include "sane_ctype.h"
  78
  79 static volatile int done;
  80 static volatile int resize;
  81
  82 #define HEADER_LINE_NR  5
  83
  84 static void perf_top__update_print_entries(struct perf_top *top)
  85 {
  86         top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
  87 }
  88
  89 static void perf_top__sig_winch(int sig __maybe_unused,
  90                                 siginfo_t *info __maybe_unused, void *arg __maybe_unused)
  91 {
  92         resize = 1;
  93 }
  94
  95 static void perf_top__resize(struct perf_top *top)
  96 {
  97         get_term_dimensions(&top->winsize);
  98         perf_top__update_print_entries(top);
  99 }
 100
 101 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
 102 {
 103         struct symbol *sym;
 104         struct annotation *notes;
 105         struct map *map;
 106         int err = -1;
 107
 108         if (!he || !he->ms.sym)
 109                 return -1;
 110
 111         sym = he->ms.sym;
 112         map = he->ms.map;
 113
 114         /*
 115          * We can't annotate with just /proc/kallsyms
 116          */
 117         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
 118             !dso__is_kcore(map->dso)) {
 119                 pr_err("Can't annotate %s: No vmlinux file was found in the "
 120                        "path\n", sym->name);
 121                 sleep(1);
 122                 return -1;
 123         }
 124
 125         notes = symbol__annotation(sym);
 126         if (notes->src != NULL) {
 127                 pthread_mutex_lock(&notes->lock);
 128                 goto out_assign;
 129         }
 130
 131         pthread_mutex_lock(&notes->lock);
 132
 133         if (symbol__alloc_hist(sym) < 0) {
 134                 pthread_mutex_unlock(&notes->lock);
 135                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 136                        sym->name);
 137                 sleep(1);
 138                 return err;
 139         }
 140
 141         err = symbol__disassemble(sym, map, NULL, 0, NULL, NULL);
 142         if (err == 0) {
 143 out_assign:
 144                 top->sym_filter_entry = he;
 145         } else {
 146                 char msg[BUFSIZ];
 147                 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
 148                 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
 149         }
 150
 151         pthread_mutex_unlock(&notes->lock);
 152         return err;
 153 }
 154
 155 static void __zero_source_counters(struct hist_entry *he)
 156 {
 157         struct symbol *sym = he->ms.sym;
 158         symbol__annotate_zero_histograms(sym);
 159 }
 160
 161 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
 162 {
 163         struct utsname uts;
 164         int err = uname(&uts);
 165
 166         ui__warning("Out of bounds address found:\n\n"
 167                     "Addr:   %" PRIx64 "\n"
 168                     "DSO:    %s %c\n"
 169                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
 170                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
 171                     "Arch:   %s\n"
 172                     "Kernel: %s\n"
 173                     "Tools:  %s\n\n"
 174                     "Not all samples will be on the annotation output.\n\n"
 175                     "Please report to linux-kernel@vger.kernel.org\n",
 176                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
 177                     map->start, map->end, sym->start, sym->end,
 178                     sym->binding == STB_GLOBAL ? 'g' :
 179                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
 180                     err ? "[unknown]" : uts.machine,
 181                     err ? "[unknown]" : uts.release, perf_version_string);
 182         if (use_browser <= 0)
 183                 sleep(5);
 184
 185         map->erange_warned = true;
 186 }
 187
 188 static void perf_top__record_precise_ip(struct perf_top *top,
 189                                         struct hist_entry *he,
 190                                         struct perf_sample *sample,
 191                                         int counter, u64 ip)
 192 {
 193         struct annotation *notes;
 194         struct symbol *sym = he->ms.sym;
 195         int err = 0;
 196
 197         if (sym == NULL || (use_browser == 0 &&
 198                             (top->sym_filter_entry == NULL ||
 199                              top->sym_filter_entry->ms.sym != sym)))
 200                 return;
 201
 202         notes = symbol__annotation(sym);
 203
 204         if (pthread_mutex_trylock(&notes->lock))
 205                 return;
 206
 207         err = hist_entry__inc_addr_samples(he, sample, counter, ip);
 208
 209         pthread_mutex_unlock(&notes->lock);
 210
 211         if (unlikely(err)) {
 212                 /*
 213                  * This function is now called with he->hists->lock held.
 214                  * Release it before going to sleep.
 215                  */
 216                 pthread_mutex_unlock(&he->hists->lock);
 217
 218                 if (err == -ERANGE && !he->ms.map->erange_warned)
 219                         ui__warn_map_erange(he->ms.map, sym, ip);
 220                 else if (err == -ENOMEM) {
 221                         pr_err("Not enough memory for annotating '%s' symbol!\n",
 222                                sym->name);
 223                         sleep(1);
 224                 }
 225
 226                 pthread_mutex_lock(&he->hists->lock);
 227         }
 228 }
 229
 230 static void perf_top__show_details(struct perf_top *top)
 231 {
 232         struct hist_entry *he = top->sym_filter_entry;
 233         struct annotation *notes;
 234         struct symbol *symbol;
 235         int more;
 236
 237         if (!he)
 238                 return;
 239
 240         symbol = he->ms.sym;
 241         notes = symbol__annotation(symbol);
 242
 243         pthread_mutex_lock(&notes->lock);
 244
 245         if (notes->src == NULL)
 246                 goto out_unlock;
 247
 248         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
 249         printf("  Events  Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
 250
 251         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
 252                                        0, top->sym_pcnt_filter, top->print_entries, 4);
 253
 254         if (top->evlist->enabled) {
 255                 if (top->zero)
 256                         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
 257                 else
 258                         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
 259         }
 260         if (more != 0)
 261                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 262 out_unlock:
 263         pthread_mutex_unlock(&notes->lock);
 264 }
 265
 266 static void perf_top__print_sym_table(struct perf_top *top)
 267 {
 268         char bf[160];
 269         int printed = 0;
 270         const int win_width = top->winsize.ws_col - 1;
 271         struct perf_evsel *evsel = top->sym_evsel;
 272         struct hists *hists = evsel__hists(evsel);
 273
 274         puts(CONSOLE_CLEAR);
 275
 276         perf_top__header_snprintf(top, bf, sizeof(bf));
 277         printf("%s\n", bf);
 278
 279         perf_top__reset_sample_counters(top);
 280
 281         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 282
 283         if (hists->stats.nr_lost_warned !=
 284             hists->stats.nr_events[PERF_RECORD_LOST]) {
 285                 hists->stats.nr_lost_warned =
 286                               hists->stats.nr_events[PERF_RECORD_LOST];
 287                 color_fprintf(stdout, PERF_COLOR_RED,
 288                               "WARNING: LOST %d chunks, Check IO/CPU overload",
 289                               hists->stats.nr_lost_warned);
 290                 ++printed;
 291         }
 292
 293         if (top->sym_filter_entry) {
 294                 perf_top__show_details(top);
 295                 return;
 296         }
 297
 298         if (top->evlist->enabled) {
 299                 if (top->zero) {
 300                         hists__delete_entries(hists);
 301                 } else {
 302                         hists__decay_entries(hists, top->hide_user_symbols,
 303                                              top->hide_kernel_symbols);
 304                 }
 305         }
 306
 307         hists__collapse_resort(hists, NULL);
 308         perf_evsel__output_resort(evsel, NULL);
 309
 310         hists__output_recalc_col_len(hists, top->print_entries - printed);
 311         putchar('\n');
 312         hists__fprintf(hists, false, top->print_entries - printed, win_width,
 313                        top->min_percent, stdout, symbol_conf.use_callchain);
 314 }
 315
 316 static void prompt_integer(int *target, const char *msg)
 317 {
 318         char *buf = malloc(0), *p;
 319         size_t dummy = 0;
 320         int tmp;
 321
 322         fprintf(stdout, "\n%s: ", msg);
 323         if (getline(&buf, &dummy, stdin) < 0)
 324                 return;
 325
 326         p = strchr(buf, '\n');
 327         if (p)
 328                 *p = 0;
 329
 330         p = buf;
 331         while(*p) {
 332                 if (!isdigit(*p))
 333                         goto out_free;
 334                 p++;
 335         }
 336         tmp = strtoul(buf, NULL, 10);
 337         *target = tmp;
 338 out_free:
 339         free(buf);
 340 }
 341
 342 static void prompt_percent(int *target, const char *msg)
 343 {
 344         int tmp = 0;
 345
 346         prompt_integer(&tmp, msg);
 347         if (tmp >= 0 && tmp <= 100)
 348                 *target = tmp;
 349 }
 350
 351 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 352 {
 353         char *buf = malloc(0), *p;
 354         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 355         struct hists *hists = evsel__hists(top->sym_evsel);
 356         struct rb_node *next;
 357         size_t dummy = 0;
 358
 359         /* zero counters of active symbol */
 360         if (syme) {
 361                 __zero_source_counters(syme);
 362                 top->sym_filter_entry = NULL;
 363         }
 364
 365         fprintf(stdout, "\n%s: ", msg);
 366         if (getline(&buf, &dummy, stdin) < 0)
 367                 goto out_free;
 368
 369         p = strchr(buf, '\n');
 370         if (p)
 371                 *p = 0;
 372
 373         next = rb_first(&hists->entries);
 374         while (next) {
 375                 n = rb_entry(next, struct hist_entry, rb_node);
 376                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
 377                         found = n;
 378                         break;
 379                 }
 380                 next = rb_next(&n->rb_node);
 381         }
 382
 383         if (!found) {
 384                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 385                 sleep(1);
 386         } else
 387                 perf_top__parse_source(top, found);
 388
 389 out_free:
 390         free(buf);
 391 }
 392
 393 static void perf_top__print_mapped_keys(struct perf_top *top)
 394 {
 395         char *name = NULL;
 396
 397         if (top->sym_filter_entry) {
 398                 struct symbol *sym = top->sym_filter_entry->ms.sym;
 399                 name = sym->name;
 400         }
 401
 402         fprintf(stdout, "\nMapped keys:\n");
 403         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
 404         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
 405
 406         if (top->evlist->nr_entries > 1)
 407                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
 408
 409         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
 410
 411         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
 412         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 413         fprintf(stdout, "\t[S]     stop annotation.\n");
 414
 415         fprintf(stdout,
 416                 "\t[K]     hide kernel_symbols symbols.     \t(%s)\n",
 417                 top->hide_kernel_symbols ? "yes" : "no");
 418         fprintf(stdout,
 419                 "\t[U]     hide user symbols.               \t(%s)\n",
 420                 top->hide_user_symbols ? "yes" : "no");
 421         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
 422         fprintf(stdout, "\t[qQ]    quit.\n");
 423 }
 424
 425 static int perf_top__key_mapped(struct perf_top *top, int c)
 426 {
 427         switch (c) {
 428                 case 'd':
 429                 case 'e':
 430                 case 'f':
 431                 case 'z':
 432                 case 'q':
 433                 case 'Q':
 434                 case 'K':
 435                 case 'U':
 436                 case 'F':
 437                 case 's':
 438                 case 'S':
 439                         return 1;
 440                 case 'E':
 441                         return top->evlist->nr_entries > 1 ? 1 : 0;
 442                 default:
 443                         break;
 444         }
 445
 446         return 0;
 447 }
 448
 449 static bool perf_top__handle_keypress(struct perf_top *top, int c)
 450 {
 451         bool ret = true;
 452
 453         if (!perf_top__key_mapped(top, c)) {
 454                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 455                 struct termios save;
 456
 457                 perf_top__print_mapped_keys(top);
 458                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 459                 fflush(stdout);
 460
 461                 set_term_quiet_input(&save);
 462
 463                 poll(&stdin_poll, 1, -1);
 464                 c = getc(stdin);
 465
 466                 tcsetattr(0, TCSAFLUSH, &save);
 467                 if (!perf_top__key_mapped(top, c))
 468                         return ret;
 469         }
 470
 471         switch (c) {
 472                 case 'd':
 473                         prompt_integer(&top->delay_secs, "Enter display delay");
 474                         if (top->delay_secs < 1)
 475                                 top->delay_secs = 1;
 476                         break;
 477                 case 'e':
 478                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
 479                         if (top->print_entries == 0) {
 480                                 struct sigaction act = {
 481                                         .sa_sigaction = perf_top__sig_winch,
 482                                         .sa_flags     = SA_SIGINFO,
 483                                 };
 484                                 perf_top__resize(top);
 485                                 sigaction(SIGWINCH, &act, NULL);
 486                         } else {
 487                                 signal(SIGWINCH, SIG_DFL);
 488                         }
 489                         break;
 490                 case 'E':
 491                         if (top->evlist->nr_entries > 1) {
 492                                 /* Select 0 as the default event: */
 493                                 int counter = 0;
 494
 495                                 fprintf(stderr, "\nAvailable events:");
 496
 497                                 evlist__for_each_entry(top->evlist, top->sym_evsel)
 498                                         fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
 499
 500                                 prompt_integer(&counter, "Enter details event counter");
 501
 502                                 if (counter >= top->evlist->nr_entries) {
 503                                         top->sym_evsel = perf_evlist__first(top->evlist);
 504                                         fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
 505                                         sleep(1);
 506                                         break;
 507                                 }
 508                                 evlist__for_each_entry(top->evlist, top->sym_evsel)
 509                                         if (top->sym_evsel->idx == counter)
 510                                                 break;
 511                         } else
 512                                 top->sym_evsel = perf_evlist__first(top->evlist);
 513                         break;
 514                 case 'f':
 515                         prompt_integer(&top->count_filter, "Enter display event count filter");
 516                         break;
 517                 case 'F':
 518                         prompt_percent(&top->sym_pcnt_filter,
 519                                        "Enter details display event filter (percent)");
 520                         break;
 521                 case 'K':
 522                         top->hide_kernel_symbols = !top->hide_kernel_symbols;
 523                         break;
 524                 case 'q':
 525                 case 'Q':
 526                         printf("exiting.\n");
 527                         if (top->dump_symtab)
 528                                 perf_session__fprintf_dsos(top->session, stderr);
 529                         ret = false;
 530                         break;
 531                 case 's':
 532                         perf_top__prompt_symbol(top, "Enter details symbol");
 533                         break;
 534                 case 'S':
 535                         if (!top->sym_filter_entry)
 536                                 break;
 537                         else {
 538                                 struct hist_entry *syme = top->sym_filter_entry;
 539
 540                                 top->sym_filter_entry = NULL;
 541                                 __zero_source_counters(syme);
 542                         }
 543                         break;
 544                 case 'U':
 545                         top->hide_user_symbols = !top->hide_user_symbols;
 546                         break;
 547                 case 'z':
 548                         top->zero = !top->zero;
 549                         break;
 550                 default:
 551                         break;
 552         }
 553
 554         return ret;
 555 }
 556
 557 static void perf_top__sort_new_samples(void *arg)
 558 {
 559         struct perf_top *t = arg;
 560         struct perf_evsel *evsel = t->sym_evsel;
 561         struct hists *hists;
 562
 563         perf_top__reset_sample_counters(t);
 564
 565         if (t->evlist->selected != NULL)
 566                 t->sym_evsel = t->evlist->selected;
 567
 568         hists = evsel__hists(evsel);
 569
 570         if (t->evlist->enabled) {
 571                 if (t->zero) {
 572                         hists__delete_entries(hists);
 573                 } else {
 574                         hists__decay_entries(hists, t->hide_user_symbols,
 575                                              t->hide_kernel_symbols);
 576                 }
 577         }
 578
 579         hists__collapse_resort(hists, NULL);
 580         perf_evsel__output_resort(evsel, NULL);
 581 }
 582
 583 static void *display_thread_tui(void *arg)
 584 {
 585         struct perf_evsel *pos;
 586         struct perf_top *top = arg;
 587         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
 588         struct hist_browser_timer hbt = {
 589                 .timer          = perf_top__sort_new_samples,
 590                 .arg            = top,
 591                 .refresh        = top->delay_secs,
 592         };
 593
 594         /* In order to read symbols from other namespaces perf to  needs to call
 595          * setns(2).  This isn't permitted if the struct_fs has multiple users.
 596          * unshare(2) the fs so that we may continue to setns into namespaces
 597          * that we're observing.
 598          */
 599         unshare(CLONE_FS);
 600
 601         perf_top__sort_new_samples(top);
 602
 603         /*
 604          * Initialize the uid_filter_str, in the future the TUI will allow
 605          * Zooming in/out UIDs. For now juse use whatever the user passed
 606          * via --uid.
 607          */
 608         evlist__for_each_entry(top->evlist, pos) {
 609                 struct hists *hists = evsel__hists(pos);
 610                 hists->uid_filter_str = top->record_opts.target.uid_str;
 611         }
 612
 613         perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
 614                                       top->min_percent,
 615                                       &top->session->header.env);
 616
 617         done = 1;
 618         return NULL;
 619 }
 620
 621 static void display_sig(int sig __maybe_unused)
 622 {
 623         done = 1;
 624 }
 625
 626 static void display_setup_sig(void)
 627 {
 628         signal(SIGSEGV, sighandler_dump_stack);
 629         signal(SIGFPE, sighandler_dump_stack);
 630         signal(SIGINT,  display_sig);
 631         signal(SIGQUIT, display_sig);
 632         signal(SIGTERM, display_sig);
 633 }
 634
 635 static void *display_thread(void *arg)
 636 {
 637         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 638         struct termios save;
 639         struct perf_top *top = arg;
 640         int delay_msecs, c;
 641
 642         /* In order to read symbols from other namespaces perf to  needs to call
 643          * setns(2).  This isn't permitted if the struct_fs has multiple users.
 644          * unshare(2) the fs so that we may continue to setns into namespaces
 645          * that we're observing.
 646          */
 647         unshare(CLONE_FS);
 648
 649         display_setup_sig();
 650         pthread__unblock_sigwinch();
 651 repeat:
 652         delay_msecs = top->delay_secs * MSEC_PER_SEC;
 653         set_term_quiet_input(&save);
 654         /* trash return*/
 655         clearerr(stdin);
 656         if (poll(&stdin_poll, 1, 0) > 0)
 657                 getc(stdin);
 658
 659         while (!done) {
 660                 perf_top__print_sym_table(top);
 661                 /*
 662                  * Either timeout expired or we got an EINTR due to SIGWINCH,
 663                  * refresh screen in both cases.
 664                  */
 665                 switch (poll(&stdin_poll, 1, delay_msecs)) {
 666                 case 0:
 667                         continue;
 668                 case -1:
 669                         if (errno == EINTR)
 670                                 continue;
 671                         __fallthrough;
 672                 default:
 673                         c = getc(stdin);
 674                         tcsetattr(0, TCSAFLUSH, &save);
 675
 676                         if (perf_top__handle_keypress(top, c))
 677                                 goto repeat;
 678                         done = 1;
 679                 }
 680         }
 681
 682         tcsetattr(0, TCSAFLUSH, &save);
 683         return NULL;
 684 }
 685
 686 static int hist_iter__top_callback(struct hist_entry_iter *iter,
 687                                    struct addr_location *al, bool single,
 688                                    void *arg)
 689 {
 690         struct perf_top *top = arg;
 691         struct hist_entry *he = iter->he;
 692         struct perf_evsel *evsel = iter->evsel;
 693
 694         if (perf_hpp_list.sym && single)
 695                 perf_top__record_precise_ip(top, he, iter->sample, evsel->idx, al->addr);
 696
 697         hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
 698                      !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
 699         return 0;
 700 }
 701
 702 static void perf_event__process_sample(struct perf_tool *tool,
 703                                        const union perf_event *event,
 704                                        struct perf_evsel *evsel,
 705                                        struct perf_sample *sample,
 706                                        struct machine *machine)
 707 {
 708         struct perf_top *top = container_of(tool, struct perf_top, tool);
 709         struct addr_location al;
 710         int err;
 711
 712         if (!machine && perf_guest) {
 713                 static struct intlist *seen;
 714
 715                 if (!seen)
 716                         seen = intlist__new(NULL);
 717
 718                 if (!intlist__has_entry(seen, sample->pid)) {
 719                         pr_err("Can't find guest [%d]'s kernel information\n",
 720                                 sample->pid);
 721                         intlist__add(seen, sample->pid);
 722                 }
 723                 return;
 724         }
 725
 726         if (!machine) {
 727                 pr_err("%u unprocessable samples recorded.\r",
 728                        top->session->evlist->stats.nr_unprocessable_samples++);
 729                 return;
 730         }
 731
 732         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
 733                 top->exact_samples++;
 734
 735         if (machine__resolve(machine, &al, sample) < 0)
 736                 return;
 737
 738         if (!machine->kptr_restrict_warned &&
 739             symbol_conf.kptr_restrict &&
 740             al.cpumode == PERF_RECORD_MISC_KERNEL) {
 741                 ui__warning(
 742 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 743 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 744 "Kernel%s samples will not be resolved.\n",
 745                           al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
 746                           " modules" : "");
 747                 if (use_browser <= 0)
 748                         sleep(5);
 749                 machine->kptr_restrict_warned = true;
 750         }
 751
 752         if (al.sym == NULL) {
 753                 const char *msg = "Kernel samples will not be resolved.\n";
 754                 /*
 755                  * As we do lazy loading of symtabs we only will know if the
 756                  * specified vmlinux file is invalid when we actually have a
 757                  * hit in kernel space and then try to load it. So if we get
 758                  * here and there are _no_ symbols in the DSO backing the
 759                  * kernel map, bail out.
 760                  *
 761                  * We may never get here, for instance, if we use -K/
 762                  * --hide-kernel-symbols, even if the user specifies an
 763                  * invalid --vmlinux ;-)
 764                  */
 765                 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
 766                     al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
 767                     RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
 768                         if (symbol_conf.vmlinux_name) {
 769                                 char serr[256];
 770                                 dso__strerror_load(al.map->dso, serr, sizeof(serr));
 771                                 ui__warning("The %s file can't be used: %s\n%s",
 772                                             symbol_conf.vmlinux_name, serr, msg);
 773                         } else {
 774                                 ui__warning("A vmlinux file was not found.\n%s",
 775                                             msg);
 776                         }
 777
 778                         if (use_browser <= 0)
 779                                 sleep(5);
 780                         top->vmlinux_warned = true;
 781                 }
 782         }
 783
 784         if (al.sym == NULL || !al.sym->idle) {
 785                 struct hists *hists = evsel__hists(evsel);
 786                 struct hist_entry_iter iter = {
 787                         .evsel          = evsel,
 788                         .sample         = sample,
 789                         .add_entry_cb   = hist_iter__top_callback,
 790                 };
 791
 792                 if (symbol_conf.cumulate_callchain)
 793                         iter.ops = &hist_iter_cumulative;
 794                 else
 795                         iter.ops = &hist_iter_normal;
 796
 797                 pthread_mutex_lock(&hists->lock);
 798
 799                 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
 800                 if (err < 0)
 801                         pr_err("Problem incrementing symbol period, skipping event\n");
 802
 803                 pthread_mutex_unlock(&hists->lock);
 804         }
 805
 806         addr_location__put(&al);
 807 }
 808
 809 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 810 {
 811         struct perf_sample sample;
 812         struct perf_evsel *evsel;
 813         struct perf_session *session = top->session;
 814         union perf_event *event;
 815         struct machine *machine;
 816         int ret;
 817
 818         while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
 819                 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
 820                 if (ret) {
 821                         pr_err("Can't parse sample, err = %d\n", ret);
 822                         goto next_event;
 823                 }
 824
 825                 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
 826                 assert(evsel != NULL);
 827
 828                 if (event->header.type == PERF_RECORD_SAMPLE)
 829                         ++top->samples;
 830
 831                 switch (sample.cpumode) {
 832                 case PERF_RECORD_MISC_USER:
 833                         ++top->us_samples;
 834                         if (top->hide_user_symbols)
 835                                 goto next_event;
 836                         machine = &session->machines.host;
 837                         break;
 838                 case PERF_RECORD_MISC_KERNEL:
 839                         ++top->kernel_samples;
 840                         if (top->hide_kernel_symbols)
 841                                 goto next_event;
 842                         machine = &session->machines.host;
 843                         break;
 844                 case PERF_RECORD_MISC_GUEST_KERNEL:
 845                         ++top->guest_kernel_samples;
 846                         machine = perf_session__find_machine(session,
 847                                                              sample.pid);
 848                         break;
 849                 case PERF_RECORD_MISC_GUEST_USER:
 850                         ++top->guest_us_samples;
 851                         /*
 852                          * TODO: we don't process guest user from host side
 853                          * except simple counting.
 854                          */
 855                         goto next_event;
 856                 default:
 857                         if (event->header.type == PERF_RECORD_SAMPLE)
 858                                 goto next_event;
 859                         machine = &session->machines.host;
 860                         break;
 861                 }
 862
 863
 864                 if (event->header.type == PERF_RECORD_SAMPLE) {
 865                         perf_event__process_sample(&top->tool, event, evsel,
 866                                                    &sample, machine);
 867                 } else if (event->header.type < PERF_RECORD_MAX) {
 868                         hists__inc_nr_events(evsel__hists(evsel), event->header.type);
 869                         machine__process_event(machine, event, &sample);
 870                 } else
 871                         ++session->evlist->stats.nr_unknown_events;
 872 next_event:
 873                 perf_evlist__mmap_consume(top->evlist, idx);
 874         }
 875 }
 876
 877 static void perf_top__mmap_read(struct perf_top *top)
 878 {
 879         int i;
 880
 881         for (i = 0; i < top->evlist->nr_mmaps; i++)
 882                 perf_top__mmap_read_idx(top, i);
 883 }
 884
 885 static int perf_top__start_counters(struct perf_top *top)
 886 {
 887         char msg[BUFSIZ];
 888         struct perf_evsel *counter;
 889         struct perf_evlist *evlist = top->evlist;
 890         struct record_opts *opts = &top->record_opts;
 891
 892         perf_evlist__config(evlist, opts, &callchain_param);
 893
 894         evlist__for_each_entry(evlist, counter) {
 895 try_again:
 896                 if (perf_evsel__open(counter, top->evlist->cpus,
 897                                      top->evlist->threads) < 0) {
 898                         if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 899                                 if (verbose > 0)
 900                                         ui__warning("%s\n", msg);
 901                                 goto try_again;
 902                         }
 903
 904                         perf_evsel__open_strerror(counter, &opts->target,
 905                                                   errno, msg, sizeof(msg));
 906                         ui__error("%s\n", msg);
 907                         goto out_err;
 908                 }
 909         }
 910
 911         if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
 912                 ui__error("Failed to mmap with %d (%s)\n",
 913                             errno, str_error_r(errno, msg, sizeof(msg)));
 914                 goto out_err;
 915         }
 916
 917         return 0;
 918
 919 out_err:
 920         return -1;
 921 }
 922
 923 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
 924 {
 925         if (!perf_hpp_list.sym) {
 926                 if (callchain->enabled) {
 927                         ui__error("Selected -g but \"sym\" not present in --sort/-s.");
 928                         return -EINVAL;
 929                 }
 930         } else if (callchain->mode != CHAIN_NONE) {
 931                 if (callchain_register_param(callchain) < 0) {
 932                         ui__error("Can't register callchain params.\n");
 933                         return -EINVAL;
 934                 }
 935         }
 936
 937         return 0;
 938 }
 939
 940 static int __cmd_top(struct perf_top *top)
 941 {
 942         char msg[512];
 943         struct perf_evsel *pos;
 944         struct perf_evsel_config_term *err_term;
 945         struct perf_evlist *evlist = top->evlist;
 946         struct record_opts *opts = &top->record_opts;
 947         pthread_t thread;
 948         int ret;
 949
 950         top->session = perf_session__new(NULL, false, NULL);
 951         if (top->session == NULL)
 952                 return -1;
 953
 954         if (!objdump_path) {
 955                 ret = perf_env__lookup_objdump(&top->session->header.env);
 956                 if (ret)
 957                         goto out_delete;
 958         }
 959
 960         ret = callchain_param__setup_sample_type(&callchain_param);
 961         if (ret)
 962                 goto out_delete;
 963
 964         if (perf_session__register_idle_thread(top->session) < 0)
 965                 goto out_delete;
 966
 967         machine__synthesize_threads(&top->session->machines.host, &opts->target,
 968                                     top->evlist->threads, false, opts->proc_map_timeout);
 969
 970         if (perf_hpp_list.socket) {
 971                 ret = perf_env__read_cpu_topology_map(&perf_env);
 972                 if (ret < 0)
 973                         goto out_err_cpu_topo;
 974         }
 975
 976         ret = perf_top__start_counters(top);
 977         if (ret)
 978                 goto out_delete;
 979
 980         ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term);
 981         if (ret) {
 982                 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
 983                         err_term->val.drv_cfg, perf_evsel__name(pos), errno,
 984                         str_error_r(errno, msg, sizeof(msg)));
 985                 goto out_delete;
 986         }
 987
 988         top->session->evlist = top->evlist;
 989         perf_session__set_id_hdr_size(top->session);
 990
 991         /*
 992          * When perf is starting the traced process, all the events (apart from
 993          * group members) have enable_on_exec=1 set, so don't spoil it by
 994          * prematurely enabling them.
 995          *
 996          * XXX 'top' still doesn't start workloads like record, trace, but should,
 997          * so leave the check here.
 998          */
 999         if (!target__none(&opts->target))
1000                 perf_evlist__enable(top->evlist);
1001
1002         /* Wait for a minimal set of events before starting the snapshot */
1003         perf_evlist__poll(top->evlist, 100);
1004
1005         perf_top__mmap_read(top);
1006
1007         ret = -1;
1008         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1009                                                             display_thread), top)) {
1010                 ui__error("Could not create display thread.\n");
1011                 goto out_delete;
1012         }
1013
1014         if (top->realtime_prio) {
1015                 struct sched_param param;
1016
1017                 param.sched_priority = top->realtime_prio;
1018                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1019                         ui__error("Could not set realtime priority.\n");
1020                         goto out_join;
1021                 }
1022         }
1023
1024         while (!done) {
1025                 u64 hits = top->samples;
1026
1027                 perf_top__mmap_read(top);
1028
1029                 if (hits == top->samples)
1030                         ret = perf_evlist__poll(top->evlist, 100);
1031
1032                 if (resize) {
1033                         perf_top__resize(top);
1034                         resize = 0;
1035                 }
1036         }
1037
1038         ret = 0;
1039 out_join:
1040         pthread_join(thread, NULL);
1041 out_delete:
1042         perf_session__delete(top->session);
1043         top->session = NULL;
1044
1045         return ret;
1046
1047 out_err_cpu_topo: {
1048         char errbuf[BUFSIZ];
1049         const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1050
1051         ui__error("Could not read the CPU topology map: %s\n", err);
1052         goto out_delete;
1053 }
1054 }
1055
1056 static int
1057 callchain_opt(const struct option *opt, const char *arg, int unset)
1058 {
1059         symbol_conf.use_callchain = true;
1060         return record_callchain_opt(opt, arg, unset);
1061 }
1062
1063 static int
1064 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1065 {
1066         struct callchain_param *callchain = opt->value;
1067
1068         callchain->enabled = !unset;
1069         callchain->record_mode = CALLCHAIN_FP;
1070
1071         /*
1072          * --no-call-graph
1073          */
1074         if (unset) {
1075                 symbol_conf.use_callchain = false;
1076                 callchain->record_mode = CALLCHAIN_NONE;
1077                 return 0;
1078         }
1079
1080         return parse_callchain_top_opt(arg);
1081 }
1082
1083 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1084 {
1085         if (!strcmp(var, "top.call-graph")) {
1086                 var = "call-graph.record-mode";
1087                 return perf_default_config(var, value, cb);
1088         }
1089         if (!strcmp(var, "top.children")) {
1090                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1091                 return 0;
1092         }
1093
1094         return 0;
1095 }
1096
1097 static int
1098 parse_percent_limit(const struct option *opt, const char *arg,
1099                     int unset __maybe_unused)
1100 {
1101         struct perf_top *top = opt->value;
1102
1103         top->min_percent = strtof(arg, NULL);
1104         return 0;
1105 }
1106
1107 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1108         "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1109
1110 int cmd_top(int argc, const char **argv)
1111 {
1112         char errbuf[BUFSIZ];
1113         struct perf_top top = {
1114                 .count_filter        = 5,
1115                 .delay_secs          = 2,
1116                 .record_opts = {
1117                         .mmap_pages     = UINT_MAX,
1118                         .user_freq      = UINT_MAX,
1119                         .user_interval  = ULLONG_MAX,
1120                         .freq           = 4000, /* 4 KHz */
1121                         .target         = {
1122                                 .uses_mmap   = true,
1123                         },
1124                         .proc_map_timeout    = 500,
1125                 },
1126                 .max_stack           = sysctl_perf_event_max_stack,
1127                 .sym_pcnt_filter     = 5,
1128         };
1129         struct record_opts *opts = &top.record_opts;
1130         struct target *target = &opts->target;
1131         const struct option options[] = {
1132         OPT_CALLBACK('e', "event", &top.evlist, "event",
1133                      "event selector. use 'perf list' to list available events",
1134                      parse_events_option),
1135         OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1136         OPT_STRING('p', "pid", &target->pid, "pid",
1137                     "profile events on existing process id"),
1138         OPT_STRING('t', "tid", &target->tid, "tid",
1139                     "profile events on existing thread id"),
1140         OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1141                             "system-wide collection from all CPUs"),
1142         OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1143                     "list of cpus to monitor"),
1144         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1145                    "file", "vmlinux pathname"),
1146         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1147                     "don't load vmlinux even if found"),
1148         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1149                     "hide kernel symbols"),
1150         OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1151                      "number of mmap data pages",
1152                      perf_evlist__parse_mmap_pages),
1153         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1154                     "collect data with this RT SCHED_FIFO priority"),
1155         OPT_INTEGER('d', "delay", &top.delay_secs,
1156                     "number of seconds to delay between refreshes"),
1157         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1158                             "dump the symbol table used for profiling"),
1159         OPT_INTEGER('f', "count-filter", &top.count_filter,
1160                     "only display functions with more events than this"),
1161         OPT_BOOLEAN(0, "group", &opts->group,
1162                             "put the counters into a counter group"),
1163         OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1164                     "child tasks do not inherit counters"),
1165         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1166                     "symbol to annotate"),
1167         OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1168         OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1169         OPT_INTEGER('E', "entries", &top.print_entries,
1170                     "display this many functions"),
1171         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1172                     "hide user symbols"),
1173         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1174         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1175         OPT_INCR('v', "verbose", &verbose,
1176                     "be more verbose (show counter open errors, etc)"),
1177         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1178                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1179                    " Please refer the man page for the complete list."),
1180         OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1181                    "output field(s): overhead, period, sample plus all of sort keys"),
1182         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1183                     "Show a column with the number of samples"),
1184         OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1185                            NULL, "enables call-graph recording and display",
1186                            &callchain_opt),
1187         OPT_CALLBACK(0, "call-graph", &callchain_param,
1188                      "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1189                      top_callchain_help, &parse_callchain_opt),
1190         OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1191                     "Accumulate callchains of children and show total overhead as well"),
1192         OPT_INTEGER(0, "max-stack", &top.max_stack,
1193                     "Set the maximum stack depth when parsing the callchain. "
1194                     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1195         OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1196                    "ignore callees of these functions in call graphs",
1197                    report_parse_ignore_callees_opt),
1198         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1199                     "Show a column with the sum of periods"),
1200         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1201                    "only consider symbols in these dsos"),
1202         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1203                    "only consider symbols in these comms"),
1204         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1205                    "only consider these symbols"),
1206         OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1207                     "Interleave source code with assembly code (default)"),
1208         OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1209                     "Display raw encoding of assembly instructions (default)"),
1210         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1211                     "Enable kernel symbol demangling"),
1212         OPT_STRING(0, "objdump", &objdump_path, "path",
1213                     "objdump binary to use for disassembly and annotations"),
1214         OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1215                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1216         OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1217         OPT_CALLBACK(0, "percent-limit", &top, "percent",
1218                      "Don't show entries under that percent", parse_percent_limit),
1219         OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1220                      "How to display percentage of filtered entries", parse_filter_percentage),
1221         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1222                    "width[,width...]",
1223                    "don't try to adjust column width, use these fixed values"),
1224         OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1225                         "per thread proc mmap processing timeout in ms"),
1226         OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1227                      "branch any", "sample any taken branches",
1228                      parse_branch_stack),
1229         OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1230                      "branch filter mask", "branch stack filter modes",
1231                      parse_branch_stack),
1232         OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1233                     "Show raw trace event output (do not use print fmt or plugins)"),
1234         OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1235                     "Show entries in a hierarchy"),
1236         OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1237         OPT_END()
1238         };
1239         const char * const top_usage[] = {
1240                 "perf top [<options>]",
1241                 NULL
1242         };
1243         int status = hists__init();
1244
1245         if (status < 0)
1246                 return status;
1247
1248         top.evlist = perf_evlist__new();
1249         if (top.evlist == NULL)
1250                 return -ENOMEM;
1251
1252         status = perf_config(perf_top_config, &top);
1253         if (status)
1254                 return status;
1255
1256         argc = parse_options(argc, argv, options, top_usage, 0);
1257         if (argc)
1258                 usage_with_options(top_usage, options);
1259
1260         if (!top.evlist->nr_entries &&
1261             perf_evlist__add_default(top.evlist) < 0) {
1262                 pr_err("Not enough memory for event selector list\n");
1263                 goto out_delete_evlist;
1264         }
1265
1266         if (symbol_conf.report_hierarchy) {
1267                 /* disable incompatible options */
1268                 symbol_conf.event_group = false;
1269                 symbol_conf.cumulate_callchain = false;
1270
1271                 if (field_order) {
1272                         pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1273                         parse_options_usage(top_usage, options, "fields", 0);
1274                         parse_options_usage(NULL, options, "hierarchy", 0);
1275                         goto out_delete_evlist;
1276                 }
1277         }
1278
1279         sort__mode = SORT_MODE__TOP;
1280         /* display thread wants entries to be collapsed in a different tree */
1281         perf_hpp_list.need_collapse = 1;
1282
1283         if (top.use_stdio)
1284                 use_browser = 0;
1285         else if (top.use_tui)
1286                 use_browser = 1;
1287
1288         setup_browser(false);
1289
1290         if (setup_sorting(top.evlist) < 0) {
1291                 if (sort_order)
1292                         parse_options_usage(top_usage, options, "s", 1);
1293                 if (field_order)
1294                         parse_options_usage(sort_order ? NULL : top_usage,
1295                                             options, "fields", 0);
1296                 goto out_delete_evlist;
1297         }
1298
1299         status = target__validate(target);
1300         if (status) {
1301                 target__strerror(target, status, errbuf, BUFSIZ);
1302                 ui__warning("%s\n", errbuf);
1303         }
1304
1305         status = target__parse_uid(target);
1306         if (status) {
1307                 int saved_errno = errno;
1308
1309                 target__strerror(target, status, errbuf, BUFSIZ);
1310                 ui__error("%s\n", errbuf);
1311
1312                 status = -saved_errno;
1313                 goto out_delete_evlist;
1314         }
1315
1316         if (target__none(target))
1317                 target->system_wide = true;
1318
1319         if (perf_evlist__create_maps(top.evlist, target) < 0) {
1320                 ui__error("Couldn't create thread/CPU maps: %s\n",
1321                           errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1322                 goto out_delete_evlist;
1323         }
1324
1325         symbol_conf.nr_events = top.evlist->nr_entries;
1326
1327         if (top.delay_secs < 1)
1328                 top.delay_secs = 1;
1329
1330         if (record_opts__config(opts)) {
1331                 status = -EINVAL;
1332                 goto out_delete_evlist;
1333         }
1334
1335         top.sym_evsel = perf_evlist__first(top.evlist);
1336
1337         if (!callchain_param.enabled) {
1338                 symbol_conf.cumulate_callchain = false;
1339                 perf_hpp__cancel_cumulate();
1340         }
1341
1342         if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1343                 callchain_param.order = ORDER_CALLER;
1344
1345         status = symbol__annotation_init();
1346         if (status < 0)
1347                 goto out_delete_evlist;
1348
1349         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1350         status = symbol__init(NULL);
1351         if (status < 0)
1352                 goto out_delete_evlist;
1353
1354         sort__setup_elide(stdout);
1355
1356         get_term_dimensions(&top.winsize);
1357         if (top.print_entries == 0) {
1358                 struct sigaction act = {
1359                         .sa_sigaction = perf_top__sig_winch,
1360                         .sa_flags     = SA_SIGINFO,
1361                 };
1362                 perf_top__update_print_entries(&top);
1363                 sigaction(SIGWINCH, &act, NULL);
1364         }
1365
1366         status = __cmd_top(&top);
1367
1368 out_delete_evlist:
1369         perf_evlist__delete(top.evlist);
1370
1371         return status;
1372 }