tools/perf/builtin-top.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * builtin-top.c
   4  *
   5  * Builtin top command: Display a continuously updated profile of
   6  * any workload, CPU or specific PID.
   7  *
   8  * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
   9  *               2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
  10  *
  11  * Improvements and fixes by:
  12  *
  13  *   Arjan van de Ven <arjan@linux.intel.com>
  14  *   Yanmin Zhang <yanmin.zhang@intel.com>
  15  *   Wu Fengguang <fengguang.wu@intel.com>
  16  *   Mike Galbraith <efault@gmx.de>
  17  *   Paul Mackerras <paulus@samba.org>
  18  */
  19 #include "builtin.h"
  20
  21 #include "perf.h"
  22
  23 #include "util/annotate.h"
  24 #include "util/bpf-event.h"
  25 #include "util/config.h"
  26 #include "util/color.h"
  27 #include "util/evlist.h"
  28 #include "util/evsel.h"
  29 #include "util/event.h"
  30 #include "util/machine.h"
  31 #include "util/map.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/sort.h"
  42 #include "util/string2.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 #include "util/ordered-events.h"
  50
  51 #include <assert.h>
  52 #include <elf.h>
  53 #include <fcntl.h>
  54
  55 #include <stdio.h>
  56 #include <termios.h>
  57 #include <unistd.h>
  58 #include <inttypes.h>
  59
  60 #include <errno.h>
  61 #include <time.h>
  62 #include <sched.h>
  63 #include <signal.h>
  64
  65 #include <sys/syscall.h>
  66 #include <sys/ioctl.h>
  67 #include <poll.h>
  68 #include <sys/prctl.h>
  69 #include <sys/wait.h>
  70 #include <sys/uio.h>
  71 #include <sys/utsname.h>
  72 #include <sys/mman.h>
  73
  74 #include <linux/stringify.h>
  75 #include <linux/time64.h>
  76 #include <linux/types.h>
  77
  78 #include <linux/ctype.h>
  79
  80 static volatile int done;
  81 static volatile int resize;
  82
  83 #define HEADER_LINE_NR  5
  84
  85 static void perf_top__update_print_entries(struct perf_top *top)
  86 {
  87         top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
  88 }
  89
  90 static void winch_sig(int sig __maybe_unused)
  91 {
  92         resize = 1;
  93 }
  94
  95 static void perf_top__resize(struct perf_top *top)
  96 {
  97         get_term_dimensions(&top->winsize);
  98         perf_top__update_print_entries(top);
  99 }
 100
 101 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
 102 {
 103         struct evsel *evsel;
 104         struct symbol *sym;
 105         struct annotation *notes;
 106         struct map *map;
 107         int err = -1;
 108
 109         if (!he || !he->ms.sym)
 110                 return -1;
 111
 112         evsel = hists_to_evsel(he->hists);
 113
 114         sym = he->ms.sym;
 115         map = he->ms.map;
 116
 117         /*
 118          * We can't annotate with just /proc/kallsyms
 119          */
 120         if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
 121             !dso__is_kcore(map->dso)) {
 122                 pr_err("Can't annotate %s: No vmlinux file was found in the "
 123                        "path\n", sym->name);
 124                 sleep(1);
 125                 return -1;
 126         }
 127
 128         notes = symbol__annotation(sym);
 129         pthread_mutex_lock(&notes->lock);
 130
 131         if (!symbol__hists(sym, top->evlist->core.nr_entries)) {
 132                 pthread_mutex_unlock(&notes->lock);
 133                 pr_err("Not enough memory for annotating '%s' symbol!\n",
 134                        sym->name);
 135                 sleep(1);
 136                 return err;
 137         }
 138
 139         err = symbol__annotate(sym, map, evsel, 0, &top->annotation_opts, NULL);
 140         if (err == 0) {
 141                 top->sym_filter_entry = he;
 142         } else {
 143                 char msg[BUFSIZ];
 144                 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
 145                 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
 146         }
 147
 148         pthread_mutex_unlock(&notes->lock);
 149         return err;
 150 }
 151
 152 static void __zero_source_counters(struct hist_entry *he)
 153 {
 154         struct symbol *sym = he->ms.sym;
 155         symbol__annotate_zero_histograms(sym);
 156 }
 157
 158 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
 159 {
 160         struct utsname uts;
 161         int err = uname(&uts);
 162
 163         ui__warning("Out of bounds address found:\n\n"
 164                     "Addr:   %" PRIx64 "\n"
 165                     "DSO:    %s %c\n"
 166                     "Map:    %" PRIx64 "-%" PRIx64 "\n"
 167                     "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
 168                     "Arch:   %s\n"
 169                     "Kernel: %s\n"
 170                     "Tools:  %s\n\n"
 171                     "Not all samples will be on the annotation output.\n\n"
 172                     "Please report to linux-kernel@vger.kernel.org\n",
 173                     ip, map->dso->long_name, dso__symtab_origin(map->dso),
 174                     map->start, map->end, sym->start, sym->end,
 175                     sym->binding == STB_GLOBAL ? 'g' :
 176                     sym->binding == STB_LOCAL  ? 'l' : 'w', sym->name,
 177                     err ? "[unknown]" : uts.machine,
 178                     err ? "[unknown]" : uts.release, perf_version_string);
 179         if (use_browser <= 0)
 180                 sleep(5);
 181
 182         map->erange_warned = true;
 183 }
 184
 185 static void perf_top__record_precise_ip(struct perf_top *top,
 186                                         struct hist_entry *he,
 187                                         struct perf_sample *sample,
 188                                         struct evsel *evsel, u64 ip)
 189 {
 190         struct annotation *notes;
 191         struct symbol *sym = he->ms.sym;
 192         int err = 0;
 193
 194         if (sym == NULL || (use_browser == 0 &&
 195                             (top->sym_filter_entry == NULL ||
 196                              top->sym_filter_entry->ms.sym != sym)))
 197                 return;
 198
 199         notes = symbol__annotation(sym);
 200
 201         if (pthread_mutex_trylock(&notes->lock))
 202                 return;
 203
 204         err = hist_entry__inc_addr_samples(he, sample, evsel, ip);
 205
 206         pthread_mutex_unlock(&notes->lock);
 207
 208         if (unlikely(err)) {
 209                 /*
 210                  * This function is now called with he->hists->lock held.
 211                  * Release it before going to sleep.
 212                  */
 213                 pthread_mutex_unlock(&he->hists->lock);
 214
 215                 if (err == -ERANGE && !he->ms.map->erange_warned)
 216                         ui__warn_map_erange(he->ms.map, sym, ip);
 217                 else if (err == -ENOMEM) {
 218                         pr_err("Not enough memory for annotating '%s' symbol!\n",
 219                                sym->name);
 220                         sleep(1);
 221                 }
 222
 223                 pthread_mutex_lock(&he->hists->lock);
 224         }
 225 }
 226
 227 static void perf_top__show_details(struct perf_top *top)
 228 {
 229         struct hist_entry *he = top->sym_filter_entry;
 230         struct evsel *evsel;
 231         struct annotation *notes;
 232         struct symbol *symbol;
 233         int more;
 234
 235         if (!he)
 236                 return;
 237
 238         evsel = hists_to_evsel(he->hists);
 239
 240         symbol = he->ms.sym;
 241         notes = symbol__annotation(symbol);
 242
 243         pthread_mutex_lock(&notes->lock);
 244
 245         symbol__calc_percent(symbol, evsel);
 246
 247         if (notes->src == NULL)
 248                 goto out_unlock;
 249
 250         printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
 251         printf("  Events  Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt);
 252
 253         more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel, &top->annotation_opts);
 254
 255         if (top->evlist->enabled) {
 256                 if (top->zero)
 257                         symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
 258                 else
 259                         symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
 260         }
 261         if (more != 0)
 262                 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
 263 out_unlock:
 264         pthread_mutex_unlock(&notes->lock);
 265 }
 266
 267 static void perf_top__print_sym_table(struct perf_top *top)
 268 {
 269         char bf[160];
 270         int printed = 0;
 271         const int win_width = top->winsize.ws_col - 1;
 272         struct evsel *evsel = top->sym_evsel;
 273         struct hists *hists = evsel__hists(evsel);
 274
 275         puts(CONSOLE_CLEAR);
 276
 277         perf_top__header_snprintf(top, bf, sizeof(bf));
 278         printf("%s\n", bf);
 279
 280         printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
 281
 282         if (!top->record_opts.overwrite &&
 283             (hists->stats.nr_lost_warned !=
 284             hists->stats.nr_events[PERF_RECORD_LOST])) {
 285                 hists->stats.nr_lost_warned =
 286                               hists->stats.nr_events[PERF_RECORD_LOST];
 287                 color_fprintf(stdout, PERF_COLOR_RED,
 288                               "WARNING: LOST %d chunks, Check IO/CPU overload",
 289                               hists->stats.nr_lost_warned);
 290                 ++printed;
 291         }
 292
 293         if (top->sym_filter_entry) {
 294                 perf_top__show_details(top);
 295                 return;
 296         }
 297
 298         if (top->evlist->enabled) {
 299                 if (top->zero) {
 300                         hists__delete_entries(hists);
 301                 } else {
 302                         hists__decay_entries(hists, top->hide_user_symbols,
 303                                              top->hide_kernel_symbols);
 304                 }
 305         }
 306
 307         hists__collapse_resort(hists, NULL);
 308         perf_evsel__output_resort(evsel, NULL);
 309
 310         hists__output_recalc_col_len(hists, top->print_entries - printed);
 311         putchar('\n');
 312         hists__fprintf(hists, false, top->print_entries - printed, win_width,
 313                        top->min_percent, stdout, !symbol_conf.use_callchain);
 314 }
 315
 316 static void prompt_integer(int *target, const char *msg)
 317 {
 318         char *buf = malloc(0), *p;
 319         size_t dummy = 0;
 320         int tmp;
 321
 322         fprintf(stdout, "\n%s: ", msg);
 323         if (getline(&buf, &dummy, stdin) < 0)
 324                 return;
 325
 326         p = strchr(buf, '\n');
 327         if (p)
 328                 *p = 0;
 329
 330         p = buf;
 331         while(*p) {
 332                 if (!isdigit(*p))
 333                         goto out_free;
 334                 p++;
 335         }
 336         tmp = strtoul(buf, NULL, 10);
 337         *target = tmp;
 338 out_free:
 339         free(buf);
 340 }
 341
 342 static void prompt_percent(int *target, const char *msg)
 343 {
 344         int tmp = 0;
 345
 346         prompt_integer(&tmp, msg);
 347         if (tmp >= 0 && tmp <= 100)
 348                 *target = tmp;
 349 }
 350
 351 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
 352 {
 353         char *buf = malloc(0), *p;
 354         struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
 355         struct hists *hists = evsel__hists(top->sym_evsel);
 356         struct rb_node *next;
 357         size_t dummy = 0;
 358
 359         /* zero counters of active symbol */
 360         if (syme) {
 361                 __zero_source_counters(syme);
 362                 top->sym_filter_entry = NULL;
 363         }
 364
 365         fprintf(stdout, "\n%s: ", msg);
 366         if (getline(&buf, &dummy, stdin) < 0)
 367                 goto out_free;
 368
 369         p = strchr(buf, '\n');
 370         if (p)
 371                 *p = 0;
 372
 373         next = rb_first_cached(&hists->entries);
 374         while (next) {
 375                 n = rb_entry(next, struct hist_entry, rb_node);
 376                 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
 377                         found = n;
 378                         break;
 379                 }
 380                 next = rb_next(&n->rb_node);
 381         }
 382
 383         if (!found) {
 384                 fprintf(stderr, "Sorry, %s is not active.\n", buf);
 385                 sleep(1);
 386         } else
 387                 perf_top__parse_source(top, found);
 388
 389 out_free:
 390         free(buf);
 391 }
 392
 393 static void perf_top__print_mapped_keys(struct perf_top *top)
 394 {
 395         char *name = NULL;
 396
 397         if (top->sym_filter_entry) {
 398                 struct symbol *sym = top->sym_filter_entry->ms.sym;
 399                 name = sym->name;
 400         }
 401
 402         fprintf(stdout, "\nMapped keys:\n");
 403         fprintf(stdout, "\t[d]     display refresh delay.             \t(%d)\n", top->delay_secs);
 404         fprintf(stdout, "\t[e]     display entries (lines).           \t(%d)\n", top->print_entries);
 405
 406         if (top->evlist->core.nr_entries > 1)
 407                 fprintf(stdout, "\t[E]     active event counter.              \t(%s)\n", perf_evsel__name(top->sym_evsel));
 408
 409         fprintf(stdout, "\t[f]     profile display filter (count).    \t(%d)\n", top->count_filter);
 410
 411         fprintf(stdout, "\t[F]     annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt);
 412         fprintf(stdout, "\t[s]     annotate symbol.                   \t(%s)\n", name?: "NULL");
 413         fprintf(stdout, "\t[S]     stop annotation.\n");
 414
 415         fprintf(stdout,
 416                 "\t[K]     hide kernel symbols.             \t(%s)\n",
 417                 top->hide_kernel_symbols ? "yes" : "no");
 418         fprintf(stdout,
 419                 "\t[U]     hide user symbols.               \t(%s)\n",
 420                 top->hide_user_symbols ? "yes" : "no");
 421         fprintf(stdout, "\t[z]     toggle sample zeroing.             \t(%d)\n", top->zero ? 1 : 0);
 422         fprintf(stdout, "\t[qQ]    quit.\n");
 423 }
 424
 425 static int perf_top__key_mapped(struct perf_top *top, int c)
 426 {
 427         switch (c) {
 428                 case 'd':
 429                 case 'e':
 430                 case 'f':
 431                 case 'z':
 432                 case 'q':
 433                 case 'Q':
 434                 case 'K':
 435                 case 'U':
 436                 case 'F':
 437                 case 's':
 438                 case 'S':
 439                         return 1;
 440                 case 'E':
 441                         return top->evlist->core.nr_entries > 1 ? 1 : 0;
 442                 default:
 443                         break;
 444         }
 445
 446         return 0;
 447 }
 448
 449 static bool perf_top__handle_keypress(struct perf_top *top, int c)
 450 {
 451         bool ret = true;
 452
 453         if (!perf_top__key_mapped(top, c)) {
 454                 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 455                 struct termios save;
 456
 457                 perf_top__print_mapped_keys(top);
 458                 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
 459                 fflush(stdout);
 460
 461                 set_term_quiet_input(&save);
 462
 463                 poll(&stdin_poll, 1, -1);
 464                 c = getc(stdin);
 465
 466                 tcsetattr(0, TCSAFLUSH, &save);
 467                 if (!perf_top__key_mapped(top, c))
 468                         return ret;
 469         }
 470
 471         switch (c) {
 472                 case 'd':
 473                         prompt_integer(&top->delay_secs, "Enter display delay");
 474                         if (top->delay_secs < 1)
 475                                 top->delay_secs = 1;
 476                         break;
 477                 case 'e':
 478                         prompt_integer(&top->print_entries, "Enter display entries (lines)");
 479                         if (top->print_entries == 0) {
 480                                 perf_top__resize(top);
 481                                 signal(SIGWINCH, winch_sig);
 482                         } else {
 483                                 signal(SIGWINCH, SIG_DFL);
 484                         }
 485                         break;
 486                 case 'E':
 487                         if (top->evlist->core.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->core.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->annotation_opts.min_pcnt,
 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 evsel *evsel = t->sym_evsel;
 557         struct hists *hists;
 558
 559         if (t->evlist->selected != NULL)
 560                 t->sym_evsel = t->evlist->selected;
 561
 562         hists = evsel__hists(evsel);
 563
 564         if (t->evlist->enabled) {
 565                 if (t->zero) {
 566                         hists__delete_entries(hists);
 567                 } else {
 568                         hists__decay_entries(hists, t->hide_user_symbols,
 569                                              t->hide_kernel_symbols);
 570                 }
 571         }
 572
 573         hists__collapse_resort(hists, NULL);
 574         perf_evsel__output_resort(evsel, NULL);
 575
 576         if (t->lost || t->drop)
 577                 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n");
 578 }
 579
 580 static void stop_top(void)
 581 {
 582         session_done = 1;
 583         done = 1;
 584 }
 585
 586 static void *display_thread_tui(void *arg)
 587 {
 588         struct evsel *pos;
 589         struct perf_top *top = arg;
 590         const char *help = "For a higher level overview, try: perf top --sort comm,dso";
 591         struct hist_browser_timer hbt = {
 592                 .timer          = perf_top__sort_new_samples,
 593                 .arg            = top,
 594                 .refresh        = top->delay_secs,
 595         };
 596
 597         /* In order to read symbols from other namespaces perf to  needs to call
 598          * setns(2).  This isn't permitted if the struct_fs has multiple users.
 599          * unshare(2) the fs so that we may continue to setns into namespaces
 600          * that we're observing.
 601          */
 602         unshare(CLONE_FS);
 603
 604         perf_top__sort_new_samples(top);
 605
 606         /*
 607          * Initialize the uid_filter_str, in the future the TUI will allow
 608          * Zooming in/out UIDs. For now just use whatever the user passed
 609          * via --uid.
 610          */
 611         evlist__for_each_entry(top->evlist, pos) {
 612                 struct hists *hists = evsel__hists(pos);
 613                 hists->uid_filter_str = top->record_opts.target.uid_str;
 614         }
 615
 616         perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
 617                                       top->min_percent,
 618                                       &top->session->header.env,
 619                                       !top->record_opts.overwrite,
 620                                       &top->annotation_opts);
 621
 622         stop_top();
 623         return NULL;
 624 }
 625
 626 static void display_sig(int sig __maybe_unused)
 627 {
 628         stop_top();
 629 }
 630
 631 static void display_setup_sig(void)
 632 {
 633         signal(SIGSEGV, sighandler_dump_stack);
 634         signal(SIGFPE, sighandler_dump_stack);
 635         signal(SIGINT,  display_sig);
 636         signal(SIGQUIT, display_sig);
 637         signal(SIGTERM, display_sig);
 638 }
 639
 640 static void *display_thread(void *arg)
 641 {
 642         struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
 643         struct termios save;
 644         struct perf_top *top = arg;
 645         int delay_msecs, c;
 646
 647         /* In order to read symbols from other namespaces perf to  needs to call
 648          * setns(2).  This isn't permitted if the struct_fs has multiple users.
 649          * unshare(2) the fs so that we may continue to setns into namespaces
 650          * that we're observing.
 651          */
 652         unshare(CLONE_FS);
 653
 654         display_setup_sig();
 655         pthread__unblock_sigwinch();
 656 repeat:
 657         delay_msecs = top->delay_secs * MSEC_PER_SEC;
 658         set_term_quiet_input(&save);
 659         /* trash return*/
 660         getc(stdin);
 661
 662         while (!done) {
 663                 perf_top__print_sym_table(top);
 664                 /*
 665                  * Either timeout expired or we got an EINTR due to SIGWINCH,
 666                  * refresh screen in both cases.
 667                  */
 668                 switch (poll(&stdin_poll, 1, delay_msecs)) {
 669                 case 0:
 670                         continue;
 671                 case -1:
 672                         if (errno == EINTR)
 673                                 continue;
 674                         __fallthrough;
 675                 default:
 676                         c = getc(stdin);
 677                         tcsetattr(0, TCSAFLUSH, &save);
 678
 679                         if (perf_top__handle_keypress(top, c))
 680                                 goto repeat;
 681                         stop_top();
 682                 }
 683         }
 684
 685         tcsetattr(0, TCSAFLUSH, &save);
 686         return NULL;
 687 }
 688
 689 static int hist_iter__top_callback(struct hist_entry_iter *iter,
 690                                    struct addr_location *al, bool single,
 691                                    void *arg)
 692 {
 693         struct perf_top *top = arg;
 694         struct hist_entry *he = iter->he;
 695         struct evsel *evsel = iter->evsel;
 696
 697         if (perf_hpp_list.sym && single)
 698                 perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr);
 699
 700         hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
 701                      !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
 702         return 0;
 703 }
 704
 705 static void perf_event__process_sample(struct perf_tool *tool,
 706                                        const union perf_event *event,
 707                                        struct evsel *evsel,
 708                                        struct perf_sample *sample,
 709                                        struct machine *machine)
 710 {
 711         struct perf_top *top = container_of(tool, struct perf_top, tool);
 712         struct addr_location al;
 713         int err;
 714
 715         if (!machine && perf_guest) {
 716                 static struct intlist *seen;
 717
 718                 if (!seen)
 719                         seen = intlist__new(NULL);
 720
 721                 if (!intlist__has_entry(seen, sample->pid)) {
 722                         pr_err("Can't find guest [%d]'s kernel information\n",
 723                                 sample->pid);
 724                         intlist__add(seen, sample->pid);
 725                 }
 726                 return;
 727         }
 728
 729         if (!machine) {
 730                 pr_err("%u unprocessable samples recorded.\r",
 731                        top->session->evlist->stats.nr_unprocessable_samples++);
 732                 return;
 733         }
 734
 735         if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
 736                 top->exact_samples++;
 737
 738         if (machine__resolve(machine, &al, sample) < 0)
 739                 return;
 740
 741         if (!machine->kptr_restrict_warned &&
 742             symbol_conf.kptr_restrict &&
 743             al.cpumode == PERF_RECORD_MISC_KERNEL) {
 744                 if (!perf_evlist__exclude_kernel(top->session->evlist)) {
 745                         ui__warning(
 746 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
 747 "Check /proc/sys/kernel/kptr_restrict.\n\n"
 748 "Kernel%s samples will not be resolved.\n",
 749                           al.map && map__has_symbols(al.map) ?
 750                           " modules" : "");
 751                         if (use_browser <= 0)
 752                                 sleep(5);
 753                 }
 754                 machine->kptr_restrict_warned = true;
 755         }
 756
 757         if (al.sym == NULL && al.map != NULL) {
 758                 const char *msg = "Kernel samples will not be resolved.\n";
 759                 /*
 760                  * As we do lazy loading of symtabs we only will know if the
 761                  * specified vmlinux file is invalid when we actually have a
 762                  * hit in kernel space and then try to load it. So if we get
 763                  * here and there are _no_ symbols in the DSO backing the
 764                  * kernel map, bail out.
 765                  *
 766                  * We may never get here, for instance, if we use -K/
 767                  * --hide-kernel-symbols, even if the user specifies an
 768                  * invalid --vmlinux ;-)
 769                  */
 770                 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
 771                     __map__is_kernel(al.map) && map__has_symbols(al.map)) {
 772                         if (symbol_conf.vmlinux_name) {
 773                                 char serr[256];
 774                                 dso__strerror_load(al.map->dso, serr, sizeof(serr));
 775                                 ui__warning("The %s file can't be used: %s\n%s",
 776                                             symbol_conf.vmlinux_name, serr, msg);
 777                         } else {
 778                                 ui__warning("A vmlinux file was not found.\n%s",
 779                                             msg);
 780                         }
 781
 782                         if (use_browser <= 0)
 783                                 sleep(5);
 784                         top->vmlinux_warned = true;
 785                 }
 786         }
 787
 788         if (al.sym == NULL || !al.sym->idle) {
 789                 struct hists *hists = evsel__hists(evsel);
 790                 struct hist_entry_iter iter = {
 791                         .evsel          = evsel,
 792                         .sample         = sample,
 793                         .add_entry_cb   = hist_iter__top_callback,
 794                 };
 795
 796                 if (symbol_conf.cumulate_callchain)
 797                         iter.ops = &hist_iter_cumulative;
 798                 else
 799                         iter.ops = &hist_iter_normal;
 800
 801                 pthread_mutex_lock(&hists->lock);
 802
 803                 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
 804                 if (err < 0)
 805                         pr_err("Problem incrementing symbol period, skipping event\n");
 806
 807                 pthread_mutex_unlock(&hists->lock);
 808         }
 809
 810         addr_location__put(&al);
 811 }
 812
 813 static void
 814 perf_top__process_lost(struct perf_top *top, union perf_event *event,
 815                        struct evsel *evsel)
 816 {
 817         struct hists *hists = evsel__hists(evsel);
 818
 819         top->lost += event->lost.lost;
 820         top->lost_total += event->lost.lost;
 821         hists->stats.total_lost += event->lost.lost;
 822 }
 823
 824 static void
 825 perf_top__process_lost_samples(struct perf_top *top,
 826                                union perf_event *event,
 827                                struct evsel *evsel)
 828 {
 829         struct hists *hists = evsel__hists(evsel);
 830
 831         top->lost += event->lost_samples.lost;
 832         top->lost_total += event->lost_samples.lost;
 833         hists->stats.total_lost_samples += event->lost_samples.lost;
 834 }
 835
 836 static u64 last_timestamp;
 837
 838 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
 839 {
 840         struct record_opts *opts = &top->record_opts;
 841         struct evlist *evlist = top->evlist;
 842         struct perf_mmap *md;
 843         union perf_event *event;
 844
 845         md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
 846         if (perf_mmap__read_init(md) < 0)
 847                 return;
 848
 849         while ((event = perf_mmap__read_event(md)) != NULL) {
 850                 int ret;
 851
 852                 ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
 853                 if (ret && ret != -1)
 854                         break;
 855
 856                 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0);
 857                 if (ret)
 858                         break;
 859
 860                 perf_mmap__consume(md);
 861
 862                 if (top->qe.rotate) {
 863                         pthread_mutex_lock(&top->qe.mutex);
 864                         top->qe.rotate = false;
 865                         pthread_cond_signal(&top->qe.cond);
 866                         pthread_mutex_unlock(&top->qe.mutex);
 867                 }
 868         }
 869
 870         perf_mmap__read_done(md);
 871 }
 872
 873 static void perf_top__mmap_read(struct perf_top *top)
 874 {
 875         bool overwrite = top->record_opts.overwrite;
 876         struct evlist *evlist = top->evlist;
 877         int i;
 878
 879         if (overwrite)
 880                 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
 881
 882         for (i = 0; i < top->evlist->nr_mmaps; i++)
 883                 perf_top__mmap_read_idx(top, i);
 884
 885         if (overwrite) {
 886                 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
 887                 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
 888         }
 889 }
 890
 891 /*
 892  * Check per-event overwrite term.
 893  * perf top should support consistent term for all events.
 894  * - All events don't have per-event term
 895  *   E.g. "cpu/cpu-cycles/,cpu/instructions/"
 896  *   Nothing change, return 0.
 897  * - All events have same per-event term
 898  *   E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
 899  *   Using the per-event setting to replace the opts->overwrite if
 900  *   they are different, then return 0.
 901  * - Events have different per-event term
 902  *   E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
 903  *   Return -1
 904  * - Some of the event set per-event term, but some not.
 905  *   E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
 906  *   Return -1
 907  */
 908 static int perf_top__overwrite_check(struct perf_top *top)
 909 {
 910         struct record_opts *opts = &top->record_opts;
 911         struct evlist *evlist = top->evlist;
 912         struct perf_evsel_config_term *term;
 913         struct list_head *config_terms;
 914         struct evsel *evsel;
 915         int set, overwrite = -1;
 916
 917         evlist__for_each_entry(evlist, evsel) {
 918                 set = -1;
 919                 config_terms = &evsel->config_terms;
 920                 list_for_each_entry(term, config_terms, list) {
 921                         if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE)
 922                                 set = term->val.overwrite ? 1 : 0;
 923                 }
 924
 925                 /* no term for current and previous event (likely) */
 926                 if ((overwrite < 0) && (set < 0))
 927                         continue;
 928
 929                 /* has term for both current and previous event, compare */
 930                 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
 931                         return -1;
 932
 933                 /* no term for current event but has term for previous one */
 934                 if ((overwrite >= 0) && (set < 0))
 935                         return -1;
 936
 937                 /* has term for current event */
 938                 if ((overwrite < 0) && (set >= 0)) {
 939                         /* if it's first event, set overwrite */
 940                         if (evsel == perf_evlist__first(evlist))
 941                                 overwrite = set;
 942                         else
 943                                 return -1;
 944                 }
 945         }
 946
 947         if ((overwrite >= 0) && (opts->overwrite != overwrite))
 948                 opts->overwrite = overwrite;
 949
 950         return 0;
 951 }
 952
 953 static int perf_top_overwrite_fallback(struct perf_top *top,
 954                                        struct evsel *evsel)
 955 {
 956         struct record_opts *opts = &top->record_opts;
 957         struct evlist *evlist = top->evlist;
 958         struct evsel *counter;
 959
 960         if (!opts->overwrite)
 961                 return 0;
 962
 963         /* only fall back when first event fails */
 964         if (evsel != perf_evlist__first(evlist))
 965                 return 0;
 966
 967         evlist__for_each_entry(evlist, counter)
 968                 counter->core.attr.write_backward = false;
 969         opts->overwrite = false;
 970         pr_debug2("fall back to non-overwrite mode\n");
 971         return 1;
 972 }
 973
 974 static int perf_top__start_counters(struct perf_top *top)
 975 {
 976         char msg[BUFSIZ];
 977         struct evsel *counter;
 978         struct evlist *evlist = top->evlist;
 979         struct record_opts *opts = &top->record_opts;
 980
 981         if (perf_top__overwrite_check(top)) {
 982                 ui__error("perf top only support consistent per-event "
 983                           "overwrite setting for all events\n");
 984                 goto out_err;
 985         }
 986
 987         perf_evlist__config(evlist, opts, &callchain_param);
 988
 989         evlist__for_each_entry(evlist, counter) {
 990 try_again:
 991                 if (evsel__open(counter, top->evlist->core.cpus,
 992                                      top->evlist->core.threads) < 0) {
 993
 994                         /*
 995                          * Specially handle overwrite fall back.
 996                          * Because perf top is the only tool which has
 997                          * overwrite mode by default, support
 998                          * both overwrite and non-overwrite mode, and
 999                          * require consistent mode for all events.
1000                          *
1001                          * May move it to generic code with more tools
1002                          * have similar attribute.
1003                          */
1004                         if (perf_missing_features.write_backward &&
1005                             perf_top_overwrite_fallback(top, counter))
1006                                 goto try_again;
1007
1008                         if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
1009                                 if (verbose > 0)
1010                                         ui__warning("%s\n", msg);
1011                                 goto try_again;
1012                         }
1013
1014                         perf_evsel__open_strerror(counter, &opts->target,
1015                                                   errno, msg, sizeof(msg));
1016                         ui__error("%s\n", msg);
1017                         goto out_err;
1018                 }
1019         }
1020
1021         if (perf_evlist__mmap(evlist, opts->mmap_pages) < 0) {
1022                 ui__error("Failed to mmap with %d (%s)\n",
1023                             errno, str_error_r(errno, msg, sizeof(msg)));
1024                 goto out_err;
1025         }
1026
1027         return 0;
1028
1029 out_err:
1030         return -1;
1031 }
1032
1033 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
1034 {
1035         if (callchain->mode != CHAIN_NONE) {
1036                 if (callchain_register_param(callchain) < 0) {
1037                         ui__error("Can't register callchain params.\n");
1038                         return -EINVAL;
1039                 }
1040         }
1041
1042         return 0;
1043 }
1044
1045 static struct ordered_events *rotate_queues(struct perf_top *top)
1046 {
1047         struct ordered_events *in = top->qe.in;
1048
1049         if (top->qe.in == &top->qe.data[1])
1050                 top->qe.in = &top->qe.data[0];
1051         else
1052                 top->qe.in = &top->qe.data[1];
1053
1054         return in;
1055 }
1056
1057 static void *process_thread(void *arg)
1058 {
1059         struct perf_top *top = arg;
1060
1061         while (!done) {
1062                 struct ordered_events *out, *in = top->qe.in;
1063
1064                 if (!in->nr_events) {
1065                         usleep(100);
1066                         continue;
1067                 }
1068
1069                 out = rotate_queues(top);
1070
1071                 pthread_mutex_lock(&top->qe.mutex);
1072                 top->qe.rotate = true;
1073                 pthread_cond_wait(&top->qe.cond, &top->qe.mutex);
1074                 pthread_mutex_unlock(&top->qe.mutex);
1075
1076                 if (ordered_events__flush(out, OE_FLUSH__TOP))
1077                         pr_err("failed to process events\n");
1078         }
1079
1080         return NULL;
1081 }
1082
1083 /*
1084  * Allow only 'top->delay_secs' seconds behind samples.
1085  */
1086 static int should_drop(struct ordered_event *qevent, struct perf_top *top)
1087 {
1088         union perf_event *event = qevent->event;
1089         u64 delay_timestamp;
1090
1091         if (event->header.type != PERF_RECORD_SAMPLE)
1092                 return false;
1093
1094         delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC;
1095         return delay_timestamp < last_timestamp;
1096 }
1097
1098 static int deliver_event(struct ordered_events *qe,
1099                          struct ordered_event *qevent)
1100 {
1101         struct perf_top *top = qe->data;
1102         struct evlist *evlist = top->evlist;
1103         struct perf_session *session = top->session;
1104         union perf_event *event = qevent->event;
1105         struct perf_sample sample;
1106         struct evsel *evsel;
1107         struct machine *machine;
1108         int ret = -1;
1109
1110         if (should_drop(qevent, top)) {
1111                 top->drop++;
1112                 top->drop_total++;
1113                 return 0;
1114         }
1115
1116         ret = perf_evlist__parse_sample(evlist, event, &sample);
1117         if (ret) {
1118                 pr_err("Can't parse sample, err = %d\n", ret);
1119                 goto next_event;
1120         }
1121
1122         evsel = perf_evlist__id2evsel(session->evlist, sample.id);
1123         assert(evsel != NULL);
1124
1125         if (event->header.type == PERF_RECORD_SAMPLE)
1126                 ++top->samples;
1127
1128         switch (sample.cpumode) {
1129         case PERF_RECORD_MISC_USER:
1130                 ++top->us_samples;
1131                 if (top->hide_user_symbols)
1132                         goto next_event;
1133                 machine = &session->machines.host;
1134                 break;
1135         case PERF_RECORD_MISC_KERNEL:
1136                 ++top->kernel_samples;
1137                 if (top->hide_kernel_symbols)
1138                         goto next_event;
1139                 machine = &session->machines.host;
1140                 break;
1141         case PERF_RECORD_MISC_GUEST_KERNEL:
1142                 ++top->guest_kernel_samples;
1143                 machine = perf_session__find_machine(session,
1144                                                      sample.pid);
1145                 break;
1146         case PERF_RECORD_MISC_GUEST_USER:
1147                 ++top->guest_us_samples;
1148                 /*
1149                  * TODO: we don't process guest user from host side
1150                  * except simple counting.
1151                  */
1152                 goto next_event;
1153         default:
1154                 if (event->header.type == PERF_RECORD_SAMPLE)
1155                         goto next_event;
1156                 machine = &session->machines.host;
1157                 break;
1158         }
1159
1160         if (event->header.type == PERF_RECORD_SAMPLE) {
1161                 perf_event__process_sample(&top->tool, event, evsel,
1162                                            &sample, machine);
1163         } else if (event->header.type == PERF_RECORD_LOST) {
1164                 perf_top__process_lost(top, event, evsel);
1165         } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) {
1166                 perf_top__process_lost_samples(top, event, evsel);
1167         } else if (event->header.type < PERF_RECORD_MAX) {
1168                 hists__inc_nr_events(evsel__hists(evsel), event->header.type);
1169                 machine__process_event(machine, event, &sample);
1170         } else
1171                 ++session->evlist->stats.nr_unknown_events;
1172
1173         ret = 0;
1174 next_event:
1175         return ret;
1176 }
1177
1178 static void init_process_thread(struct perf_top *top)
1179 {
1180         ordered_events__init(&top->qe.data[0], deliver_event, top);
1181         ordered_events__init(&top->qe.data[1], deliver_event, top);
1182         ordered_events__set_copy_on_queue(&top->qe.data[0], true);
1183         ordered_events__set_copy_on_queue(&top->qe.data[1], true);
1184         top->qe.in = &top->qe.data[0];
1185         pthread_mutex_init(&top->qe.mutex, NULL);
1186         pthread_cond_init(&top->qe.cond, NULL);
1187 }
1188
1189 static int __cmd_top(struct perf_top *top)
1190 {
1191         struct record_opts *opts = &top->record_opts;
1192         pthread_t thread, thread_process;
1193         int ret;
1194
1195         if (!top->annotation_opts.objdump_path) {
1196                 ret = perf_env__lookup_objdump(&top->session->header.env,
1197                                                &top->annotation_opts.objdump_path);
1198                 if (ret)
1199                         return ret;
1200         }
1201
1202         ret = callchain_param__setup_sample_type(&callchain_param);
1203         if (ret)
1204                 return ret;
1205
1206         if (perf_session__register_idle_thread(top->session) < 0)
1207                 return ret;
1208
1209         if (top->nr_threads_synthesize > 1)
1210                 perf_set_multithreaded();
1211
1212         init_process_thread(top);
1213
1214         if (opts->record_namespaces)
1215                 top->tool.namespace_events = true;
1216
1217         ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
1218                                                 &top->session->machines.host,
1219                                                 &top->record_opts);
1220         if (ret < 0)
1221                 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n");
1222
1223         machine__synthesize_threads(&top->session->machines.host, &opts->target,
1224                                     top->evlist->core.threads, false,
1225                                     top->nr_threads_synthesize);
1226
1227         if (top->nr_threads_synthesize > 1)
1228                 perf_set_singlethreaded();
1229
1230         if (perf_hpp_list.socket) {
1231                 ret = perf_env__read_cpu_topology_map(&perf_env);
1232                 if (ret < 0) {
1233                         char errbuf[BUFSIZ];
1234                         const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1235
1236                         ui__error("Could not read the CPU topology map: %s\n", err);
1237                         return ret;
1238                 }
1239         }
1240
1241         ret = perf_top__start_counters(top);
1242         if (ret)
1243                 return ret;
1244
1245         top->session->evlist = top->evlist;
1246         perf_session__set_id_hdr_size(top->session);
1247
1248         /*
1249          * When perf is starting the traced process, all the events (apart from
1250          * group members) have enable_on_exec=1 set, so don't spoil it by
1251          * prematurely enabling them.
1252          *
1253          * XXX 'top' still doesn't start workloads like record, trace, but should,
1254          * so leave the check here.
1255          */
1256         if (!target__none(&opts->target))
1257                 evlist__enable(top->evlist);
1258
1259         ret = -1;
1260         if (pthread_create(&thread_process, NULL, process_thread, top)) {
1261                 ui__error("Could not create process thread.\n");
1262                 return ret;
1263         }
1264
1265         if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1266                                                             display_thread), top)) {
1267                 ui__error("Could not create display thread.\n");
1268                 goto out_join_thread;
1269         }
1270
1271         if (top->realtime_prio) {
1272                 struct sched_param param;
1273
1274                 param.sched_priority = top->realtime_prio;
1275                 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1276                         ui__error("Could not set realtime priority.\n");
1277                         goto out_join;
1278                 }
1279         }
1280
1281         /* Wait for a minimal set of events before starting the snapshot */
1282         perf_evlist__poll(top->evlist, 100);
1283
1284         perf_top__mmap_read(top);
1285
1286         while (!done) {
1287                 u64 hits = top->samples;
1288
1289                 perf_top__mmap_read(top);
1290
1291                 if (opts->overwrite || (hits == top->samples))
1292                         ret = perf_evlist__poll(top->evlist, 100);
1293
1294                 if (resize) {
1295                         perf_top__resize(top);
1296                         resize = 0;
1297                 }
1298         }
1299
1300         ret = 0;
1301 out_join:
1302         pthread_join(thread, NULL);
1303 out_join_thread:
1304         pthread_cond_signal(&top->qe.cond);
1305         pthread_join(thread_process, NULL);
1306         return ret;
1307 }
1308
1309 static int
1310 callchain_opt(const struct option *opt, const char *arg, int unset)
1311 {
1312         symbol_conf.use_callchain = true;
1313         return record_callchain_opt(opt, arg, unset);
1314 }
1315
1316 static int
1317 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1318 {
1319         struct callchain_param *callchain = opt->value;
1320
1321         callchain->enabled = !unset;
1322         callchain->record_mode = CALLCHAIN_FP;
1323
1324         /*
1325          * --no-call-graph
1326          */
1327         if (unset) {
1328                 symbol_conf.use_callchain = false;
1329                 callchain->record_mode = CALLCHAIN_NONE;
1330                 return 0;
1331         }
1332
1333         return parse_callchain_top_opt(arg);
1334 }
1335
1336 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1337 {
1338         if (!strcmp(var, "top.call-graph")) {
1339                 var = "call-graph.record-mode";
1340                 return perf_default_config(var, value, cb);
1341         }
1342         if (!strcmp(var, "top.children")) {
1343                 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1344                 return 0;
1345         }
1346
1347         return 0;
1348 }
1349
1350 static int
1351 parse_percent_limit(const struct option *opt, const char *arg,
1352                     int unset __maybe_unused)
1353 {
1354         struct perf_top *top = opt->value;
1355
1356         top->min_percent = strtof(arg, NULL);
1357         return 0;
1358 }
1359
1360 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1361         "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1362
1363 int cmd_top(int argc, const char **argv)
1364 {
1365         char errbuf[BUFSIZ];
1366         struct perf_top top = {
1367                 .count_filter        = 5,
1368                 .delay_secs          = 2,
1369                 .record_opts = {
1370                         .mmap_pages     = UINT_MAX,
1371                         .user_freq      = UINT_MAX,
1372                         .user_interval  = ULLONG_MAX,
1373                         .freq           = 4000, /* 4 KHz */
1374                         .target         = {
1375                                 .uses_mmap   = true,
1376                         },
1377                         /*
1378                          * FIXME: This will lose PERF_RECORD_MMAP and other metadata
1379                          * when we pause, fix that and reenable. Probably using a
1380                          * separate evlist with a dummy event, i.e. a non-overwrite
1381                          * ring buffer just for metadata events, while PERF_RECORD_SAMPLE
1382                          * stays in overwrite mode. -acme
1383                          * */
1384                         .overwrite      = 0,
1385                         .sample_time    = true,
1386                         .sample_time_set = true,
1387                 },
1388                 .max_stack           = sysctl__max_stack(),
1389                 .annotation_opts     = annotation__default_options,
1390                 .nr_threads_synthesize = UINT_MAX,
1391         };
1392         struct record_opts *opts = &top.record_opts;
1393         struct target *target = &opts->target;
1394         const struct option options[] = {
1395         OPT_CALLBACK('e', "event", &top.evlist, "event",
1396                      "event selector. use 'perf list' to list available events",
1397                      parse_events_option),
1398         OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1399         OPT_STRING('p', "pid", &target->pid, "pid",
1400                     "profile events on existing process id"),
1401         OPT_STRING('t', "tid", &target->tid, "tid",
1402                     "profile events on existing thread id"),
1403         OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1404                             "system-wide collection from all CPUs"),
1405         OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1406                     "list of cpus to monitor"),
1407         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1408                    "file", "vmlinux pathname"),
1409         OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1410                     "don't load vmlinux even if found"),
1411         OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1412                    "file", "kallsyms pathname"),
1413         OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1414                     "hide kernel symbols"),
1415         OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1416                      "number of mmap data pages",
1417                      perf_evlist__parse_mmap_pages),
1418         OPT_INTEGER('r', "realtime", &top.realtime_prio,
1419                     "collect data with this RT SCHED_FIFO priority"),
1420         OPT_INTEGER('d', "delay", &top.delay_secs,
1421                     "number of seconds to delay between refreshes"),
1422         OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1423                             "dump the symbol table used for profiling"),
1424         OPT_INTEGER('f', "count-filter", &top.count_filter,
1425                     "only display functions with more events than this"),
1426         OPT_BOOLEAN(0, "group", &opts->group,
1427                             "put the counters into a counter group"),
1428         OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1429                     "child tasks do not inherit counters"),
1430         OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1431                     "symbol to annotate"),
1432         OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1433         OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
1434                      "profile at this frequency",
1435                       record__parse_freq),
1436         OPT_INTEGER('E', "entries", &top.print_entries,
1437                     "display this many functions"),
1438         OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1439                     "hide user symbols"),
1440         OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1441         OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1442         OPT_INCR('v', "verbose", &verbose,
1443                     "be more verbose (show counter open errors, etc)"),
1444         OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1445                    "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1446                    " Please refer the man page for the complete list."),
1447         OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1448                    "output field(s): overhead, period, sample plus all of sort keys"),
1449         OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1450                     "Show a column with the number of samples"),
1451         OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1452                            NULL, "enables call-graph recording and display",
1453                            &callchain_opt),
1454         OPT_CALLBACK(0, "call-graph", &callchain_param,
1455                      "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1456                      top_callchain_help, &parse_callchain_opt),
1457         OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1458                     "Accumulate callchains of children and show total overhead as well"),
1459         OPT_INTEGER(0, "max-stack", &top.max_stack,
1460                     "Set the maximum stack depth when parsing the callchain. "
1461                     "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1462         OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1463                    "ignore callees of these functions in call graphs",
1464                    report_parse_ignore_callees_opt),
1465         OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1466                     "Show a column with the sum of periods"),
1467         OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1468                    "only consider symbols in these dsos"),
1469         OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1470                    "only consider symbols in these comms"),
1471         OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1472                    "only consider these symbols"),
1473         OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src,
1474                     "Interleave source code with assembly code (default)"),
1475         OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw,
1476                     "Display raw encoding of assembly instructions (default)"),
1477         OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1478                     "Enable kernel symbol demangling"),
1479         OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
1480         OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
1481                     "objdump binary to use for disassembly and annotations"),
1482         OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
1483                    "Specify disassembler style (e.g. -M intel for intel syntax)"),
1484         OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1485         OPT_CALLBACK(0, "percent-limit", &top, "percent",
1486                      "Don't show entries under that percent", parse_percent_limit),
1487         OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1488                      "How to display percentage of filtered entries", parse_filter_percentage),
1489         OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1490                    "width[,width...]",
1491                    "don't try to adjust column width, use these fixed values"),
1492         OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1493                         "per thread proc mmap processing timeout in ms"),
1494         OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1495                      "branch any", "sample any taken branches",
1496                      parse_branch_stack),
1497         OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1498                      "branch filter mask", "branch stack filter modes",
1499                      parse_branch_stack),
1500         OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1501                     "Show raw trace event output (do not use print fmt or plugins)"),
1502         OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1503                     "Show entries in a hierarchy"),
1504         OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
1505                     "Use a backward ring buffer, default: no"),
1506         OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1507         OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
1508                         "number of thread to run event synthesize"),
1509         OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
1510                     "Record namespaces events"),
1511         OPT_END()
1512         };
1513         struct evlist *sb_evlist = NULL;
1514         const char * const top_usage[] = {
1515                 "perf top [<options>]",
1516                 NULL
1517         };
1518         int status = hists__init();
1519
1520         if (status < 0)
1521                 return status;
1522
1523         top.annotation_opts.min_pcnt = 5;
1524         top.annotation_opts.context  = 4;
1525
1526         top.evlist = evlist__new();
1527         if (top.evlist == NULL)
1528                 return -ENOMEM;
1529
1530         status = perf_config(perf_top_config, &top);
1531         if (status)
1532                 return status;
1533
1534         argc = parse_options(argc, argv, options, top_usage, 0);
1535         if (argc)
1536                 usage_with_options(top_usage, options);
1537
1538         if (!top.evlist->core.nr_entries &&
1539             perf_evlist__add_default(top.evlist) < 0) {
1540                 pr_err("Not enough memory for event selector list\n");
1541                 goto out_delete_evlist;
1542         }
1543
1544         if (symbol_conf.report_hierarchy) {
1545                 /* disable incompatible options */
1546                 symbol_conf.event_group = false;
1547                 symbol_conf.cumulate_callchain = false;
1548
1549                 if (field_order) {
1550                         pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1551                         parse_options_usage(top_usage, options, "fields", 0);
1552                         parse_options_usage(NULL, options, "hierarchy", 0);
1553                         goto out_delete_evlist;
1554                 }
1555         }
1556
1557         if (opts->branch_stack && callchain_param.enabled)
1558                 symbol_conf.show_branchflag_count = true;
1559
1560         sort__mode = SORT_MODE__TOP;
1561         /* display thread wants entries to be collapsed in a different tree */
1562         perf_hpp_list.need_collapse = 1;
1563
1564         if (top.use_stdio)
1565                 use_browser = 0;
1566         else if (top.use_tui)
1567                 use_browser = 1;
1568
1569         setup_browser(false);
1570
1571         if (setup_sorting(top.evlist) < 0) {
1572                 if (sort_order)
1573                         parse_options_usage(top_usage, options, "s", 1);
1574                 if (field_order)
1575                         parse_options_usage(sort_order ? NULL : top_usage,
1576                                             options, "fields", 0);
1577                 goto out_delete_evlist;
1578         }
1579
1580         status = target__validate(target);
1581         if (status) {
1582                 target__strerror(target, status, errbuf, BUFSIZ);
1583                 ui__warning("%s\n", errbuf);
1584         }
1585
1586         status = target__parse_uid(target);
1587         if (status) {
1588                 int saved_errno = errno;
1589
1590                 target__strerror(target, status, errbuf, BUFSIZ);
1591                 ui__error("%s\n", errbuf);
1592
1593                 status = -saved_errno;
1594                 goto out_delete_evlist;
1595         }
1596
1597         if (target__none(target))
1598                 target->system_wide = true;
1599
1600         if (perf_evlist__create_maps(top.evlist, target) < 0) {
1601                 ui__error("Couldn't create thread/CPU maps: %s\n",
1602                           errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1603                 goto out_delete_evlist;
1604         }
1605
1606         if (top.delay_secs < 1)
1607                 top.delay_secs = 1;
1608
1609         if (record_opts__config(opts)) {
1610                 status = -EINVAL;
1611                 goto out_delete_evlist;
1612         }
1613
1614         top.sym_evsel = perf_evlist__first(top.evlist);
1615
1616         if (!callchain_param.enabled) {
1617                 symbol_conf.cumulate_callchain = false;
1618                 perf_hpp__cancel_cumulate();
1619         }
1620
1621         if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1622                 callchain_param.order = ORDER_CALLER;
1623
1624         status = symbol__annotation_init();
1625         if (status < 0)
1626                 goto out_delete_evlist;
1627
1628         annotation_config__init();
1629
1630         symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1631         status = symbol__init(NULL);
1632         if (status < 0)
1633                 goto out_delete_evlist;
1634
1635         sort__setup_elide(stdout);
1636
1637         get_term_dimensions(&top.winsize);
1638         if (top.print_entries == 0) {
1639                 perf_top__update_print_entries(&top);
1640                 signal(SIGWINCH, winch_sig);
1641         }
1642
1643         top.session = perf_session__new(NULL, false, NULL);
1644         if (top.session == NULL) {
1645                 status = -1;
1646                 goto out_delete_evlist;
1647         }
1648
1649         if (!top.record_opts.no_bpf_event)
1650                 bpf_event__add_sb_event(&sb_evlist, &perf_env);
1651
1652         if (perf_evlist__start_sb_thread(sb_evlist, target)) {
1653                 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
1654                 opts->no_bpf_event = true;
1655         }
1656
1657         status = __cmd_top(&top);
1658
1659         if (!opts->no_bpf_event)
1660                 perf_evlist__stop_sb_thread(sb_evlist);
1661
1662 out_delete_evlist:
1663         evlist__delete(top.evlist);
1664         perf_session__delete(top.session);
1665
1666         return status;
1667 }