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