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