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(¬es->lock); 130 131 if (!symbol__hists(sym, top->evlist->core.nr_entries)) { 132 pthread_mutex_unlock(¬es->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(¬es->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(¬es->lock)) 202 return; 203 204 err = hist_entry__inc_addr_samples(he, sample, evsel, ip); 205 206 pthread_mutex_unlock(¬es->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(¬es->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(¬es->lock); 265 } 266 267 static void evlist__resort_hists(struct evlist *evlist) 268 { 269 struct evsel *pos; 270 271 evlist__for_each_entry(evlist, pos) { 272 struct hists *hists = evsel__hists(pos); 273 274 hists__collapse_resort(hists, NULL); 275 276 /* Non-group events are considered as leader */ 277 if (symbol_conf.event_group && 278 !perf_evsel__is_group_leader(pos)) { 279 struct hists *leader_hists = evsel__hists(pos->leader); 280 281 hists__match(leader_hists, hists); 282 hists__link(leader_hists, hists); 283 } 284 } 285 286 evlist__for_each_entry(evlist, pos) { 287 perf_evsel__output_resort(pos, NULL); 288 } 289 } 290 291 static void perf_top__print_sym_table(struct perf_top *top) 292 { 293 char bf[160]; 294 int printed = 0; 295 const int win_width = top->winsize.ws_col - 1; 296 struct evsel *evsel = top->sym_evsel; 297 struct hists *hists = evsel__hists(evsel); 298 299 puts(CONSOLE_CLEAR); 300 301 perf_top__header_snprintf(top, bf, sizeof(bf)); 302 printf("%s\n", bf); 303 304 printf("%-*.*s\n", win_width, win_width, graph_dotted_line); 305 306 if (!top->record_opts.overwrite && 307 (hists->stats.nr_lost_warned != 308 hists->stats.nr_events[PERF_RECORD_LOST])) { 309 hists->stats.nr_lost_warned = 310 hists->stats.nr_events[PERF_RECORD_LOST]; 311 color_fprintf(stdout, PERF_COLOR_RED, 312 "WARNING: LOST %d chunks, Check IO/CPU overload", 313 hists->stats.nr_lost_warned); 314 ++printed; 315 } 316 317 if (top->sym_filter_entry) { 318 perf_top__show_details(top); 319 return; 320 } 321 322 if (top->evlist->enabled) { 323 if (top->zero) { 324 hists__delete_entries(hists); 325 } else { 326 hists__decay_entries(hists, top->hide_user_symbols, 327 top->hide_kernel_symbols); 328 } 329 } 330 331 evlist__resort_hists(top->evlist); 332 333 hists__output_recalc_col_len(hists, top->print_entries - printed); 334 putchar('\n'); 335 hists__fprintf(hists, false, top->print_entries - printed, win_width, 336 top->min_percent, stdout, !symbol_conf.use_callchain); 337 } 338 339 static void prompt_integer(int *target, const char *msg) 340 { 341 char *buf = malloc(0), *p; 342 size_t dummy = 0; 343 int tmp; 344 345 fprintf(stdout, "\n%s: ", msg); 346 if (getline(&buf, &dummy, stdin) < 0) 347 return; 348 349 p = strchr(buf, '\n'); 350 if (p) 351 *p = 0; 352 353 p = buf; 354 while(*p) { 355 if (!isdigit(*p)) 356 goto out_free; 357 p++; 358 } 359 tmp = strtoul(buf, NULL, 10); 360 *target = tmp; 361 out_free: 362 free(buf); 363 } 364 365 static void prompt_percent(int *target, const char *msg) 366 { 367 int tmp = 0; 368 369 prompt_integer(&tmp, msg); 370 if (tmp >= 0 && tmp <= 100) 371 *target = tmp; 372 } 373 374 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg) 375 { 376 char *buf = malloc(0), *p; 377 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL; 378 struct hists *hists = evsel__hists(top->sym_evsel); 379 struct rb_node *next; 380 size_t dummy = 0; 381 382 /* zero counters of active symbol */ 383 if (syme) { 384 __zero_source_counters(syme); 385 top->sym_filter_entry = NULL; 386 } 387 388 fprintf(stdout, "\n%s: ", msg); 389 if (getline(&buf, &dummy, stdin) < 0) 390 goto out_free; 391 392 p = strchr(buf, '\n'); 393 if (p) 394 *p = 0; 395 396 next = rb_first_cached(&hists->entries); 397 while (next) { 398 n = rb_entry(next, struct hist_entry, rb_node); 399 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) { 400 found = n; 401 break; 402 } 403 next = rb_next(&n->rb_node); 404 } 405 406 if (!found) { 407 fprintf(stderr, "Sorry, %s is not active.\n", buf); 408 sleep(1); 409 } else 410 perf_top__parse_source(top, found); 411 412 out_free: 413 free(buf); 414 } 415 416 static void perf_top__print_mapped_keys(struct perf_top *top) 417 { 418 char *name = NULL; 419 420 if (top->sym_filter_entry) { 421 struct symbol *sym = top->sym_filter_entry->ms.sym; 422 name = sym->name; 423 } 424 425 fprintf(stdout, "\nMapped keys:\n"); 426 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs); 427 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries); 428 429 if (top->evlist->core.nr_entries > 1) 430 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel)); 431 432 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter); 433 434 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt); 435 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 436 fprintf(stdout, "\t[S] stop annotation.\n"); 437 438 fprintf(stdout, 439 "\t[K] hide kernel symbols. \t(%s)\n", 440 top->hide_kernel_symbols ? "yes" : "no"); 441 fprintf(stdout, 442 "\t[U] hide user symbols. \t(%s)\n", 443 top->hide_user_symbols ? "yes" : "no"); 444 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0); 445 fprintf(stdout, "\t[qQ] quit.\n"); 446 } 447 448 static int perf_top__key_mapped(struct perf_top *top, int c) 449 { 450 switch (c) { 451 case 'd': 452 case 'e': 453 case 'f': 454 case 'z': 455 case 'q': 456 case 'Q': 457 case 'K': 458 case 'U': 459 case 'F': 460 case 's': 461 case 'S': 462 return 1; 463 case 'E': 464 return top->evlist->core.nr_entries > 1 ? 1 : 0; 465 default: 466 break; 467 } 468 469 return 0; 470 } 471 472 static bool perf_top__handle_keypress(struct perf_top *top, int c) 473 { 474 bool ret = true; 475 476 if (!perf_top__key_mapped(top, c)) { 477 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 478 struct termios save; 479 480 perf_top__print_mapped_keys(top); 481 fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 482 fflush(stdout); 483 484 set_term_quiet_input(&save); 485 486 poll(&stdin_poll, 1, -1); 487 c = getc(stdin); 488 489 tcsetattr(0, TCSAFLUSH, &save); 490 if (!perf_top__key_mapped(top, c)) 491 return ret; 492 } 493 494 switch (c) { 495 case 'd': 496 prompt_integer(&top->delay_secs, "Enter display delay"); 497 if (top->delay_secs < 1) 498 top->delay_secs = 1; 499 break; 500 case 'e': 501 prompt_integer(&top->print_entries, "Enter display entries (lines)"); 502 if (top->print_entries == 0) { 503 perf_top__resize(top); 504 signal(SIGWINCH, winch_sig); 505 } else { 506 signal(SIGWINCH, SIG_DFL); 507 } 508 break; 509 case 'E': 510 if (top->evlist->core.nr_entries > 1) { 511 /* Select 0 as the default event: */ 512 int counter = 0; 513 514 fprintf(stderr, "\nAvailable events:"); 515 516 evlist__for_each_entry(top->evlist, top->sym_evsel) 517 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel)); 518 519 prompt_integer(&counter, "Enter details event counter"); 520 521 if (counter >= top->evlist->core.nr_entries) { 522 top->sym_evsel = perf_evlist__first(top->evlist); 523 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel)); 524 sleep(1); 525 break; 526 } 527 evlist__for_each_entry(top->evlist, top->sym_evsel) 528 if (top->sym_evsel->idx == counter) 529 break; 530 } else 531 top->sym_evsel = perf_evlist__first(top->evlist); 532 break; 533 case 'f': 534 prompt_integer(&top->count_filter, "Enter display event count filter"); 535 break; 536 case 'F': 537 prompt_percent(&top->annotation_opts.min_pcnt, 538 "Enter details display event filter (percent)"); 539 break; 540 case 'K': 541 top->hide_kernel_symbols = !top->hide_kernel_symbols; 542 break; 543 case 'q': 544 case 'Q': 545 printf("exiting.\n"); 546 if (top->dump_symtab) 547 perf_session__fprintf_dsos(top->session, stderr); 548 ret = false; 549 break; 550 case 's': 551 perf_top__prompt_symbol(top, "Enter details symbol"); 552 break; 553 case 'S': 554 if (!top->sym_filter_entry) 555 break; 556 else { 557 struct hist_entry *syme = top->sym_filter_entry; 558 559 top->sym_filter_entry = NULL; 560 __zero_source_counters(syme); 561 } 562 break; 563 case 'U': 564 top->hide_user_symbols = !top->hide_user_symbols; 565 break; 566 case 'z': 567 top->zero = !top->zero; 568 break; 569 default: 570 break; 571 } 572 573 return ret; 574 } 575 576 static void perf_top__sort_new_samples(void *arg) 577 { 578 struct perf_top *t = arg; 579 struct evsel *evsel = t->sym_evsel; 580 struct hists *hists; 581 582 if (t->evlist->selected != NULL) 583 t->sym_evsel = t->evlist->selected; 584 585 hists = evsel__hists(evsel); 586 587 if (t->evlist->enabled) { 588 if (t->zero) { 589 hists__delete_entries(hists); 590 } else { 591 hists__decay_entries(hists, t->hide_user_symbols, 592 t->hide_kernel_symbols); 593 } 594 } 595 596 evlist__resort_hists(t->evlist); 597 598 if (t->lost || t->drop) 599 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n"); 600 } 601 602 static void stop_top(void) 603 { 604 session_done = 1; 605 done = 1; 606 } 607 608 static void *display_thread_tui(void *arg) 609 { 610 struct evsel *pos; 611 struct perf_top *top = arg; 612 const char *help = "For a higher level overview, try: perf top --sort comm,dso"; 613 struct hist_browser_timer hbt = { 614 .timer = perf_top__sort_new_samples, 615 .arg = top, 616 .refresh = top->delay_secs, 617 }; 618 619 /* In order to read symbols from other namespaces perf to needs to call 620 * setns(2). This isn't permitted if the struct_fs has multiple users. 621 * unshare(2) the fs so that we may continue to setns into namespaces 622 * that we're observing. 623 */ 624 unshare(CLONE_FS); 625 626 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0); 627 628 perf_top__sort_new_samples(top); 629 630 /* 631 * Initialize the uid_filter_str, in the future the TUI will allow 632 * Zooming in/out UIDs. For now just use whatever the user passed 633 * via --uid. 634 */ 635 evlist__for_each_entry(top->evlist, pos) { 636 struct hists *hists = evsel__hists(pos); 637 hists->uid_filter_str = top->record_opts.target.uid_str; 638 } 639 640 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, 641 top->min_percent, 642 &top->session->header.env, 643 !top->record_opts.overwrite, 644 &top->annotation_opts); 645 646 stop_top(); 647 return NULL; 648 } 649 650 static void display_sig(int sig __maybe_unused) 651 { 652 stop_top(); 653 } 654 655 static void display_setup_sig(void) 656 { 657 signal(SIGSEGV, sighandler_dump_stack); 658 signal(SIGFPE, sighandler_dump_stack); 659 signal(SIGINT, display_sig); 660 signal(SIGQUIT, display_sig); 661 signal(SIGTERM, display_sig); 662 } 663 664 static void *display_thread(void *arg) 665 { 666 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 667 struct termios save; 668 struct perf_top *top = arg; 669 int delay_msecs, c; 670 671 /* In order to read symbols from other namespaces perf to needs to call 672 * setns(2). This isn't permitted if the struct_fs has multiple users. 673 * unshare(2) the fs so that we may continue to setns into namespaces 674 * that we're observing. 675 */ 676 unshare(CLONE_FS); 677 678 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0); 679 680 display_setup_sig(); 681 pthread__unblock_sigwinch(); 682 repeat: 683 delay_msecs = top->delay_secs * MSEC_PER_SEC; 684 set_term_quiet_input(&save); 685 /* trash return*/ 686 getc(stdin); 687 688 while (!done) { 689 perf_top__print_sym_table(top); 690 /* 691 * Either timeout expired or we got an EINTR due to SIGWINCH, 692 * refresh screen in both cases. 693 */ 694 switch (poll(&stdin_poll, 1, delay_msecs)) { 695 case 0: 696 continue; 697 case -1: 698 if (errno == EINTR) 699 continue; 700 __fallthrough; 701 default: 702 c = getc(stdin); 703 tcsetattr(0, TCSAFLUSH, &save); 704 705 if (perf_top__handle_keypress(top, c)) 706 goto repeat; 707 stop_top(); 708 } 709 } 710 711 tcsetattr(0, TCSAFLUSH, &save); 712 return NULL; 713 } 714 715 static int hist_iter__top_callback(struct hist_entry_iter *iter, 716 struct addr_location *al, bool single, 717 void *arg) 718 { 719 struct perf_top *top = arg; 720 struct hist_entry *he = iter->he; 721 struct evsel *evsel = iter->evsel; 722 723 if (perf_hpp_list.sym && single) 724 perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr); 725 726 hist__account_cycles(iter->sample->branch_stack, al, iter->sample, 727 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY)); 728 return 0; 729 } 730 731 static void perf_event__process_sample(struct perf_tool *tool, 732 const union perf_event *event, 733 struct evsel *evsel, 734 struct perf_sample *sample, 735 struct machine *machine) 736 { 737 struct perf_top *top = container_of(tool, struct perf_top, tool); 738 struct addr_location al; 739 int err; 740 741 if (!machine && perf_guest) { 742 static struct intlist *seen; 743 744 if (!seen) 745 seen = intlist__new(NULL); 746 747 if (!intlist__has_entry(seen, sample->pid)) { 748 pr_err("Can't find guest [%d]'s kernel information\n", 749 sample->pid); 750 intlist__add(seen, sample->pid); 751 } 752 return; 753 } 754 755 if (!machine) { 756 pr_err("%u unprocessable samples recorded.\r", 757 top->session->evlist->stats.nr_unprocessable_samples++); 758 return; 759 } 760 761 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) 762 top->exact_samples++; 763 764 if (machine__resolve(machine, &al, sample) < 0) 765 return; 766 767 if (!machine->kptr_restrict_warned && 768 symbol_conf.kptr_restrict && 769 al.cpumode == PERF_RECORD_MISC_KERNEL) { 770 if (!perf_evlist__exclude_kernel(top->session->evlist)) { 771 ui__warning( 772 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 773 "Check /proc/sys/kernel/kptr_restrict.\n\n" 774 "Kernel%s samples will not be resolved.\n", 775 al.map && map__has_symbols(al.map) ? 776 " modules" : ""); 777 if (use_browser <= 0) 778 sleep(5); 779 } 780 machine->kptr_restrict_warned = true; 781 } 782 783 if (al.sym == NULL && al.map != NULL) { 784 const char *msg = "Kernel samples will not be resolved.\n"; 785 /* 786 * As we do lazy loading of symtabs we only will know if the 787 * specified vmlinux file is invalid when we actually have a 788 * hit in kernel space and then try to load it. So if we get 789 * here and there are _no_ symbols in the DSO backing the 790 * kernel map, bail out. 791 * 792 * We may never get here, for instance, if we use -K/ 793 * --hide-kernel-symbols, even if the user specifies an 794 * invalid --vmlinux ;-) 795 */ 796 if (!machine->kptr_restrict_warned && !top->vmlinux_warned && 797 __map__is_kernel(al.map) && map__has_symbols(al.map)) { 798 if (symbol_conf.vmlinux_name) { 799 char serr[256]; 800 dso__strerror_load(al.map->dso, serr, sizeof(serr)); 801 ui__warning("The %s file can't be used: %s\n%s", 802 symbol_conf.vmlinux_name, serr, msg); 803 } else { 804 ui__warning("A vmlinux file was not found.\n%s", 805 msg); 806 } 807 808 if (use_browser <= 0) 809 sleep(5); 810 top->vmlinux_warned = true; 811 } 812 } 813 814 if (al.sym == NULL || !al.sym->idle) { 815 struct hists *hists = evsel__hists(evsel); 816 struct hist_entry_iter iter = { 817 .evsel = evsel, 818 .sample = sample, 819 .add_entry_cb = hist_iter__top_callback, 820 }; 821 822 if (symbol_conf.cumulate_callchain) 823 iter.ops = &hist_iter_cumulative; 824 else 825 iter.ops = &hist_iter_normal; 826 827 pthread_mutex_lock(&hists->lock); 828 829 err = hist_entry_iter__add(&iter, &al, top->max_stack, top); 830 if (err < 0) 831 pr_err("Problem incrementing symbol period, skipping event\n"); 832 833 pthread_mutex_unlock(&hists->lock); 834 } 835 836 addr_location__put(&al); 837 } 838 839 static void 840 perf_top__process_lost(struct perf_top *top, union perf_event *event, 841 struct evsel *evsel) 842 { 843 struct hists *hists = evsel__hists(evsel); 844 845 top->lost += event->lost.lost; 846 top->lost_total += event->lost.lost; 847 hists->stats.total_lost += event->lost.lost; 848 } 849 850 static void 851 perf_top__process_lost_samples(struct perf_top *top, 852 union perf_event *event, 853 struct evsel *evsel) 854 { 855 struct hists *hists = evsel__hists(evsel); 856 857 top->lost += event->lost_samples.lost; 858 top->lost_total += event->lost_samples.lost; 859 hists->stats.total_lost_samples += event->lost_samples.lost; 860 } 861 862 static u64 last_timestamp; 863 864 static void perf_top__mmap_read_idx(struct perf_top *top, int idx) 865 { 866 struct record_opts *opts = &top->record_opts; 867 struct evlist *evlist = top->evlist; 868 struct perf_mmap *md; 869 union perf_event *event; 870 871 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx]; 872 if (perf_mmap__read_init(md) < 0) 873 return; 874 875 while ((event = perf_mmap__read_event(md)) != NULL) { 876 int ret; 877 878 ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp); 879 if (ret && ret != -1) 880 break; 881 882 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0); 883 if (ret) 884 break; 885 886 perf_mmap__consume(md); 887 888 if (top->qe.rotate) { 889 pthread_mutex_lock(&top->qe.mutex); 890 top->qe.rotate = false; 891 pthread_cond_signal(&top->qe.cond); 892 pthread_mutex_unlock(&top->qe.mutex); 893 } 894 } 895 896 perf_mmap__read_done(md); 897 } 898 899 static void perf_top__mmap_read(struct perf_top *top) 900 { 901 bool overwrite = top->record_opts.overwrite; 902 struct evlist *evlist = top->evlist; 903 int i; 904 905 if (overwrite) 906 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING); 907 908 for (i = 0; i < top->evlist->nr_mmaps; i++) 909 perf_top__mmap_read_idx(top, i); 910 911 if (overwrite) { 912 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); 913 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); 914 } 915 } 916 917 /* 918 * Check per-event overwrite term. 919 * perf top should support consistent term for all events. 920 * - All events don't have per-event term 921 * E.g. "cpu/cpu-cycles/,cpu/instructions/" 922 * Nothing change, return 0. 923 * - All events have same per-event term 924 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/ 925 * Using the per-event setting to replace the opts->overwrite if 926 * they are different, then return 0. 927 * - Events have different per-event term 928 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/" 929 * Return -1 930 * - Some of the event set per-event term, but some not. 931 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/" 932 * Return -1 933 */ 934 static int perf_top__overwrite_check(struct perf_top *top) 935 { 936 struct record_opts *opts = &top->record_opts; 937 struct evlist *evlist = top->evlist; 938 struct perf_evsel_config_term *term; 939 struct list_head *config_terms; 940 struct evsel *evsel; 941 int set, overwrite = -1; 942 943 evlist__for_each_entry(evlist, evsel) { 944 set = -1; 945 config_terms = &evsel->config_terms; 946 list_for_each_entry(term, config_terms, list) { 947 if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE) 948 set = term->val.overwrite ? 1 : 0; 949 } 950 951 /* no term for current and previous event (likely) */ 952 if ((overwrite < 0) && (set < 0)) 953 continue; 954 955 /* has term for both current and previous event, compare */ 956 if ((overwrite >= 0) && (set >= 0) && (overwrite != set)) 957 return -1; 958 959 /* no term for current event but has term for previous one */ 960 if ((overwrite >= 0) && (set < 0)) 961 return -1; 962 963 /* has term for current event */ 964 if ((overwrite < 0) && (set >= 0)) { 965 /* if it's first event, set overwrite */ 966 if (evsel == perf_evlist__first(evlist)) 967 overwrite = set; 968 else 969 return -1; 970 } 971 } 972 973 if ((overwrite >= 0) && (opts->overwrite != overwrite)) 974 opts->overwrite = overwrite; 975 976 return 0; 977 } 978 979 static int perf_top_overwrite_fallback(struct perf_top *top, 980 struct evsel *evsel) 981 { 982 struct record_opts *opts = &top->record_opts; 983 struct evlist *evlist = top->evlist; 984 struct evsel *counter; 985 986 if (!opts->overwrite) 987 return 0; 988 989 /* only fall back when first event fails */ 990 if (evsel != perf_evlist__first(evlist)) 991 return 0; 992 993 evlist__for_each_entry(evlist, counter) 994 counter->core.attr.write_backward = false; 995 opts->overwrite = false; 996 pr_debug2("fall back to non-overwrite mode\n"); 997 return 1; 998 } 999 1000 static int perf_top__start_counters(struct perf_top *top) 1001 { 1002 char msg[BUFSIZ]; 1003 struct evsel *counter; 1004 struct evlist *evlist = top->evlist; 1005 struct record_opts *opts = &top->record_opts; 1006 1007 if (perf_top__overwrite_check(top)) { 1008 ui__error("perf top only support consistent per-event " 1009 "overwrite setting for all events\n"); 1010 goto out_err; 1011 } 1012 1013 perf_evlist__config(evlist, opts, &callchain_param); 1014 1015 evlist__for_each_entry(evlist, counter) { 1016 try_again: 1017 if (evsel__open(counter, top->evlist->core.cpus, 1018 top->evlist->core.threads) < 0) { 1019 1020 /* 1021 * Specially handle overwrite fall back. 1022 * Because perf top is the only tool which has 1023 * overwrite mode by default, support 1024 * both overwrite and non-overwrite mode, and 1025 * require consistent mode for all events. 1026 * 1027 * May move it to generic code with more tools 1028 * have similar attribute. 1029 */ 1030 if (perf_missing_features.write_backward && 1031 perf_top_overwrite_fallback(top, counter)) 1032 goto try_again; 1033 1034 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 1035 if (verbose > 0) 1036 ui__warning("%s\n", msg); 1037 goto try_again; 1038 } 1039 1040 perf_evsel__open_strerror(counter, &opts->target, 1041 errno, msg, sizeof(msg)); 1042 ui__error("%s\n", msg); 1043 goto out_err; 1044 } 1045 } 1046 1047 if (perf_evlist__mmap(evlist, opts->mmap_pages) < 0) { 1048 ui__error("Failed to mmap with %d (%s)\n", 1049 errno, str_error_r(errno, msg, sizeof(msg))); 1050 goto out_err; 1051 } 1052 1053 return 0; 1054 1055 out_err: 1056 return -1; 1057 } 1058 1059 static int callchain_param__setup_sample_type(struct callchain_param *callchain) 1060 { 1061 if (callchain->mode != CHAIN_NONE) { 1062 if (callchain_register_param(callchain) < 0) { 1063 ui__error("Can't register callchain params.\n"); 1064 return -EINVAL; 1065 } 1066 } 1067 1068 return 0; 1069 } 1070 1071 static struct ordered_events *rotate_queues(struct perf_top *top) 1072 { 1073 struct ordered_events *in = top->qe.in; 1074 1075 if (top->qe.in == &top->qe.data[1]) 1076 top->qe.in = &top->qe.data[0]; 1077 else 1078 top->qe.in = &top->qe.data[1]; 1079 1080 return in; 1081 } 1082 1083 static void *process_thread(void *arg) 1084 { 1085 struct perf_top *top = arg; 1086 1087 while (!done) { 1088 struct ordered_events *out, *in = top->qe.in; 1089 1090 if (!in->nr_events) { 1091 usleep(100); 1092 continue; 1093 } 1094 1095 out = rotate_queues(top); 1096 1097 pthread_mutex_lock(&top->qe.mutex); 1098 top->qe.rotate = true; 1099 pthread_cond_wait(&top->qe.cond, &top->qe.mutex); 1100 pthread_mutex_unlock(&top->qe.mutex); 1101 1102 if (ordered_events__flush(out, OE_FLUSH__TOP)) 1103 pr_err("failed to process events\n"); 1104 } 1105 1106 return NULL; 1107 } 1108 1109 /* 1110 * Allow only 'top->delay_secs' seconds behind samples. 1111 */ 1112 static int should_drop(struct ordered_event *qevent, struct perf_top *top) 1113 { 1114 union perf_event *event = qevent->event; 1115 u64 delay_timestamp; 1116 1117 if (event->header.type != PERF_RECORD_SAMPLE) 1118 return false; 1119 1120 delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC; 1121 return delay_timestamp < last_timestamp; 1122 } 1123 1124 static int deliver_event(struct ordered_events *qe, 1125 struct ordered_event *qevent) 1126 { 1127 struct perf_top *top = qe->data; 1128 struct evlist *evlist = top->evlist; 1129 struct perf_session *session = top->session; 1130 union perf_event *event = qevent->event; 1131 struct perf_sample sample; 1132 struct evsel *evsel; 1133 struct machine *machine; 1134 int ret = -1; 1135 1136 if (should_drop(qevent, top)) { 1137 top->drop++; 1138 top->drop_total++; 1139 return 0; 1140 } 1141 1142 ret = perf_evlist__parse_sample(evlist, event, &sample); 1143 if (ret) { 1144 pr_err("Can't parse sample, err = %d\n", ret); 1145 goto next_event; 1146 } 1147 1148 evsel = perf_evlist__id2evsel(session->evlist, sample.id); 1149 assert(evsel != NULL); 1150 1151 if (event->header.type == PERF_RECORD_SAMPLE) { 1152 if (evswitch__discard(&top->evswitch, evsel)) 1153 return 0; 1154 ++top->samples; 1155 } 1156 1157 switch (sample.cpumode) { 1158 case PERF_RECORD_MISC_USER: 1159 ++top->us_samples; 1160 if (top->hide_user_symbols) 1161 goto next_event; 1162 machine = &session->machines.host; 1163 break; 1164 case PERF_RECORD_MISC_KERNEL: 1165 ++top->kernel_samples; 1166 if (top->hide_kernel_symbols) 1167 goto next_event; 1168 machine = &session->machines.host; 1169 break; 1170 case PERF_RECORD_MISC_GUEST_KERNEL: 1171 ++top->guest_kernel_samples; 1172 machine = perf_session__find_machine(session, 1173 sample.pid); 1174 break; 1175 case PERF_RECORD_MISC_GUEST_USER: 1176 ++top->guest_us_samples; 1177 /* 1178 * TODO: we don't process guest user from host side 1179 * except simple counting. 1180 */ 1181 goto next_event; 1182 default: 1183 if (event->header.type == PERF_RECORD_SAMPLE) 1184 goto next_event; 1185 machine = &session->machines.host; 1186 break; 1187 } 1188 1189 if (event->header.type == PERF_RECORD_SAMPLE) { 1190 perf_event__process_sample(&top->tool, event, evsel, 1191 &sample, machine); 1192 } else if (event->header.type == PERF_RECORD_LOST) { 1193 perf_top__process_lost(top, event, evsel); 1194 } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) { 1195 perf_top__process_lost_samples(top, event, evsel); 1196 } else if (event->header.type < PERF_RECORD_MAX) { 1197 hists__inc_nr_events(evsel__hists(evsel), event->header.type); 1198 machine__process_event(machine, event, &sample); 1199 } else 1200 ++session->evlist->stats.nr_unknown_events; 1201 1202 ret = 0; 1203 next_event: 1204 return ret; 1205 } 1206 1207 static void init_process_thread(struct perf_top *top) 1208 { 1209 ordered_events__init(&top->qe.data[0], deliver_event, top); 1210 ordered_events__init(&top->qe.data[1], deliver_event, top); 1211 ordered_events__set_copy_on_queue(&top->qe.data[0], true); 1212 ordered_events__set_copy_on_queue(&top->qe.data[1], true); 1213 top->qe.in = &top->qe.data[0]; 1214 pthread_mutex_init(&top->qe.mutex, NULL); 1215 pthread_cond_init(&top->qe.cond, NULL); 1216 } 1217 1218 static int __cmd_top(struct perf_top *top) 1219 { 1220 struct record_opts *opts = &top->record_opts; 1221 pthread_t thread, thread_process; 1222 int ret; 1223 1224 if (!top->annotation_opts.objdump_path) { 1225 ret = perf_env__lookup_objdump(&top->session->header.env, 1226 &top->annotation_opts.objdump_path); 1227 if (ret) 1228 return ret; 1229 } 1230 1231 ret = callchain_param__setup_sample_type(&callchain_param); 1232 if (ret) 1233 return ret; 1234 1235 if (perf_session__register_idle_thread(top->session) < 0) 1236 return ret; 1237 1238 if (top->nr_threads_synthesize > 1) 1239 perf_set_multithreaded(); 1240 1241 init_process_thread(top); 1242 1243 if (opts->record_namespaces) 1244 top->tool.namespace_events = true; 1245 1246 ret = perf_event__synthesize_bpf_events(top->session, perf_event__process, 1247 &top->session->machines.host, 1248 &top->record_opts); 1249 if (ret < 0) 1250 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n"); 1251 1252 machine__synthesize_threads(&top->session->machines.host, &opts->target, 1253 top->evlist->core.threads, false, 1254 top->nr_threads_synthesize); 1255 1256 if (top->nr_threads_synthesize > 1) 1257 perf_set_singlethreaded(); 1258 1259 if (perf_hpp_list.socket) { 1260 ret = perf_env__read_cpu_topology_map(&perf_env); 1261 if (ret < 0) { 1262 char errbuf[BUFSIZ]; 1263 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf)); 1264 1265 ui__error("Could not read the CPU topology map: %s\n", err); 1266 return ret; 1267 } 1268 } 1269 1270 ret = perf_top__start_counters(top); 1271 if (ret) 1272 return ret; 1273 1274 top->session->evlist = top->evlist; 1275 perf_session__set_id_hdr_size(top->session); 1276 1277 /* 1278 * When perf is starting the traced process, all the events (apart from 1279 * group members) have enable_on_exec=1 set, so don't spoil it by 1280 * prematurely enabling them. 1281 * 1282 * XXX 'top' still doesn't start workloads like record, trace, but should, 1283 * so leave the check here. 1284 */ 1285 if (!target__none(&opts->target)) 1286 evlist__enable(top->evlist); 1287 1288 ret = -1; 1289 if (pthread_create(&thread_process, NULL, process_thread, top)) { 1290 ui__error("Could not create process thread.\n"); 1291 return ret; 1292 } 1293 1294 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : 1295 display_thread), top)) { 1296 ui__error("Could not create display thread.\n"); 1297 goto out_join_thread; 1298 } 1299 1300 if (top->realtime_prio) { 1301 struct sched_param param; 1302 1303 param.sched_priority = top->realtime_prio; 1304 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 1305 ui__error("Could not set realtime priority.\n"); 1306 goto out_join; 1307 } 1308 } 1309 1310 /* Wait for a minimal set of events before starting the snapshot */ 1311 perf_evlist__poll(top->evlist, 100); 1312 1313 perf_top__mmap_read(top); 1314 1315 while (!done) { 1316 u64 hits = top->samples; 1317 1318 perf_top__mmap_read(top); 1319 1320 if (opts->overwrite || (hits == top->samples)) 1321 ret = perf_evlist__poll(top->evlist, 100); 1322 1323 if (resize) { 1324 perf_top__resize(top); 1325 resize = 0; 1326 } 1327 } 1328 1329 ret = 0; 1330 out_join: 1331 pthread_join(thread, NULL); 1332 out_join_thread: 1333 pthread_cond_signal(&top->qe.cond); 1334 pthread_join(thread_process, NULL); 1335 return ret; 1336 } 1337 1338 static int 1339 callchain_opt(const struct option *opt, const char *arg, int unset) 1340 { 1341 symbol_conf.use_callchain = true; 1342 return record_callchain_opt(opt, arg, unset); 1343 } 1344 1345 static int 1346 parse_callchain_opt(const struct option *opt, const char *arg, int unset) 1347 { 1348 struct callchain_param *callchain = opt->value; 1349 1350 callchain->enabled = !unset; 1351 callchain->record_mode = CALLCHAIN_FP; 1352 1353 /* 1354 * --no-call-graph 1355 */ 1356 if (unset) { 1357 symbol_conf.use_callchain = false; 1358 callchain->record_mode = CALLCHAIN_NONE; 1359 return 0; 1360 } 1361 1362 return parse_callchain_top_opt(arg); 1363 } 1364 1365 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused) 1366 { 1367 if (!strcmp(var, "top.call-graph")) { 1368 var = "call-graph.record-mode"; 1369 return perf_default_config(var, value, cb); 1370 } 1371 if (!strcmp(var, "top.children")) { 1372 symbol_conf.cumulate_callchain = perf_config_bool(var, value); 1373 return 0; 1374 } 1375 1376 return 0; 1377 } 1378 1379 static int 1380 parse_percent_limit(const struct option *opt, const char *arg, 1381 int unset __maybe_unused) 1382 { 1383 struct perf_top *top = opt->value; 1384 1385 top->min_percent = strtof(arg, NULL); 1386 return 0; 1387 } 1388 1389 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP 1390 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function"; 1391 1392 int cmd_top(int argc, const char **argv) 1393 { 1394 char errbuf[BUFSIZ]; 1395 struct perf_top top = { 1396 .count_filter = 5, 1397 .delay_secs = 2, 1398 .record_opts = { 1399 .mmap_pages = UINT_MAX, 1400 .user_freq = UINT_MAX, 1401 .user_interval = ULLONG_MAX, 1402 .freq = 4000, /* 4 KHz */ 1403 .target = { 1404 .uses_mmap = true, 1405 }, 1406 /* 1407 * FIXME: This will lose PERF_RECORD_MMAP and other metadata 1408 * when we pause, fix that and reenable. Probably using a 1409 * separate evlist with a dummy event, i.e. a non-overwrite 1410 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE 1411 * stays in overwrite mode. -acme 1412 * */ 1413 .overwrite = 0, 1414 .sample_time = true, 1415 .sample_time_set = true, 1416 }, 1417 .max_stack = sysctl__max_stack(), 1418 .annotation_opts = annotation__default_options, 1419 .nr_threads_synthesize = UINT_MAX, 1420 }; 1421 struct record_opts *opts = &top.record_opts; 1422 struct target *target = &opts->target; 1423 const struct option options[] = { 1424 OPT_CALLBACK('e', "event", &top.evlist, "event", 1425 "event selector. use 'perf list' to list available events", 1426 parse_events_option), 1427 OPT_U64('c', "count", &opts->user_interval, "event period to sample"), 1428 OPT_STRING('p', "pid", &target->pid, "pid", 1429 "profile events on existing process id"), 1430 OPT_STRING('t', "tid", &target->tid, "tid", 1431 "profile events on existing thread id"), 1432 OPT_BOOLEAN('a', "all-cpus", &target->system_wide, 1433 "system-wide collection from all CPUs"), 1434 OPT_STRING('C', "cpu", &target->cpu_list, "cpu", 1435 "list of cpus to monitor"), 1436 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 1437 "file", "vmlinux pathname"), 1438 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux, 1439 "don't load vmlinux even if found"), 1440 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, 1441 "file", "kallsyms pathname"), 1442 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, 1443 "hide kernel symbols"), 1444 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages", 1445 "number of mmap data pages", 1446 perf_evlist__parse_mmap_pages), 1447 OPT_INTEGER('r', "realtime", &top.realtime_prio, 1448 "collect data with this RT SCHED_FIFO priority"), 1449 OPT_INTEGER('d', "delay", &top.delay_secs, 1450 "number of seconds to delay between refreshes"), 1451 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab, 1452 "dump the symbol table used for profiling"), 1453 OPT_INTEGER('f', "count-filter", &top.count_filter, 1454 "only display functions with more events than this"), 1455 OPT_BOOLEAN(0, "group", &opts->group, 1456 "put the counters into a counter group"), 1457 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit, 1458 "child tasks do not inherit counters"), 1459 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name", 1460 "symbol to annotate"), 1461 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"), 1462 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'", 1463 "profile at this frequency", 1464 record__parse_freq), 1465 OPT_INTEGER('E', "entries", &top.print_entries, 1466 "display this many functions"), 1467 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, 1468 "hide user symbols"), 1469 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"), 1470 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"), 1471 OPT_INCR('v', "verbose", &verbose, 1472 "be more verbose (show counter open errors, etc)"), 1473 OPT_STRING('s', "sort", &sort_order, "key[,key2...]", 1474 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..." 1475 " Please refer the man page for the complete list."), 1476 OPT_STRING(0, "fields", &field_order, "key[,keys...]", 1477 "output field(s): overhead, period, sample plus all of sort keys"), 1478 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, 1479 "Show a column with the number of samples"), 1480 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, 1481 NULL, "enables call-graph recording and display", 1482 &callchain_opt), 1483 OPT_CALLBACK(0, "call-graph", &callchain_param, 1484 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]", 1485 top_callchain_help, &parse_callchain_opt), 1486 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain, 1487 "Accumulate callchains of children and show total overhead as well"), 1488 OPT_INTEGER(0, "max-stack", &top.max_stack, 1489 "Set the maximum stack depth when parsing the callchain. " 1490 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 1491 OPT_CALLBACK(0, "ignore-callees", NULL, "regex", 1492 "ignore callees of these functions in call graphs", 1493 report_parse_ignore_callees_opt), 1494 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, 1495 "Show a column with the sum of periods"), 1496 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", 1497 "only consider symbols in these dsos"), 1498 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]", 1499 "only consider symbols in these comms"), 1500 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", 1501 "only consider these symbols"), 1502 OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src, 1503 "Interleave source code with assembly code (default)"), 1504 OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw, 1505 "Display raw encoding of assembly instructions (default)"), 1506 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, 1507 "Enable kernel symbol demangling"), 1508 OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"), 1509 OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path", 1510 "objdump binary to use for disassembly and annotations"), 1511 OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style", 1512 "Specify disassembler style (e.g. -M intel for intel syntax)"), 1513 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"), 1514 OPT_CALLBACK(0, "percent-limit", &top, "percent", 1515 "Don't show entries under that percent", parse_percent_limit), 1516 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute", 1517 "How to display percentage of filtered entries", parse_filter_percentage), 1518 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str, 1519 "width[,width...]", 1520 "don't try to adjust column width, use these fixed values"), 1521 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 1522 "per thread proc mmap processing timeout in ms"), 1523 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack, 1524 "branch any", "sample any taken branches", 1525 parse_branch_stack), 1526 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack, 1527 "branch filter mask", "branch stack filter modes", 1528 parse_branch_stack), 1529 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace, 1530 "Show raw trace event output (do not use print fmt or plugins)"), 1531 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy, 1532 "Show entries in a hierarchy"), 1533 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite, 1534 "Use a backward ring buffer, default: no"), 1535 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"), 1536 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize, 1537 "number of thread to run event synthesize"), 1538 OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces, 1539 "Record namespaces events"), 1540 OPTS_EVSWITCH(&top.evswitch), 1541 OPT_END() 1542 }; 1543 struct evlist *sb_evlist = NULL; 1544 const char * const top_usage[] = { 1545 "perf top [<options>]", 1546 NULL 1547 }; 1548 int status = hists__init(); 1549 1550 if (status < 0) 1551 return status; 1552 1553 top.annotation_opts.min_pcnt = 5; 1554 top.annotation_opts.context = 4; 1555 1556 top.evlist = evlist__new(); 1557 if (top.evlist == NULL) 1558 return -ENOMEM; 1559 1560 status = perf_config(perf_top_config, &top); 1561 if (status) 1562 return status; 1563 1564 argc = parse_options(argc, argv, options, top_usage, 0); 1565 if (argc) 1566 usage_with_options(top_usage, options); 1567 1568 if (!top.evlist->core.nr_entries && 1569 perf_evlist__add_default(top.evlist) < 0) { 1570 pr_err("Not enough memory for event selector list\n"); 1571 goto out_delete_evlist; 1572 } 1573 1574 status = evswitch__init(&top.evswitch, top.evlist, stderr); 1575 if (status) 1576 goto out_delete_evlist; 1577 1578 if (symbol_conf.report_hierarchy) { 1579 /* disable incompatible options */ 1580 symbol_conf.event_group = false; 1581 symbol_conf.cumulate_callchain = false; 1582 1583 if (field_order) { 1584 pr_err("Error: --hierarchy and --fields options cannot be used together\n"); 1585 parse_options_usage(top_usage, options, "fields", 0); 1586 parse_options_usage(NULL, options, "hierarchy", 0); 1587 goto out_delete_evlist; 1588 } 1589 } 1590 1591 if (opts->branch_stack && callchain_param.enabled) 1592 symbol_conf.show_branchflag_count = true; 1593 1594 sort__mode = SORT_MODE__TOP; 1595 /* display thread wants entries to be collapsed in a different tree */ 1596 perf_hpp_list.need_collapse = 1; 1597 1598 if (top.use_stdio) 1599 use_browser = 0; 1600 else if (top.use_tui) 1601 use_browser = 1; 1602 1603 setup_browser(false); 1604 1605 if (setup_sorting(top.evlist) < 0) { 1606 if (sort_order) 1607 parse_options_usage(top_usage, options, "s", 1); 1608 if (field_order) 1609 parse_options_usage(sort_order ? NULL : top_usage, 1610 options, "fields", 0); 1611 goto out_delete_evlist; 1612 } 1613 1614 status = target__validate(target); 1615 if (status) { 1616 target__strerror(target, status, errbuf, BUFSIZ); 1617 ui__warning("%s\n", errbuf); 1618 } 1619 1620 status = target__parse_uid(target); 1621 if (status) { 1622 int saved_errno = errno; 1623 1624 target__strerror(target, status, errbuf, BUFSIZ); 1625 ui__error("%s\n", errbuf); 1626 1627 status = -saved_errno; 1628 goto out_delete_evlist; 1629 } 1630 1631 if (target__none(target)) 1632 target->system_wide = true; 1633 1634 if (perf_evlist__create_maps(top.evlist, target) < 0) { 1635 ui__error("Couldn't create thread/CPU maps: %s\n", 1636 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf))); 1637 goto out_delete_evlist; 1638 } 1639 1640 if (top.delay_secs < 1) 1641 top.delay_secs = 1; 1642 1643 if (record_opts__config(opts)) { 1644 status = -EINVAL; 1645 goto out_delete_evlist; 1646 } 1647 1648 top.sym_evsel = perf_evlist__first(top.evlist); 1649 1650 if (!callchain_param.enabled) { 1651 symbol_conf.cumulate_callchain = false; 1652 perf_hpp__cancel_cumulate(); 1653 } 1654 1655 if (symbol_conf.cumulate_callchain && !callchain_param.order_set) 1656 callchain_param.order = ORDER_CALLER; 1657 1658 status = symbol__annotation_init(); 1659 if (status < 0) 1660 goto out_delete_evlist; 1661 1662 annotation_config__init(); 1663 1664 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); 1665 status = symbol__init(NULL); 1666 if (status < 0) 1667 goto out_delete_evlist; 1668 1669 sort__setup_elide(stdout); 1670 1671 get_term_dimensions(&top.winsize); 1672 if (top.print_entries == 0) { 1673 perf_top__update_print_entries(&top); 1674 signal(SIGWINCH, winch_sig); 1675 } 1676 1677 top.session = perf_session__new(NULL, false, NULL); 1678 if (top.session == NULL) { 1679 status = -1; 1680 goto out_delete_evlist; 1681 } 1682 1683 if (!top.record_opts.no_bpf_event) 1684 bpf_event__add_sb_event(&sb_evlist, &perf_env); 1685 1686 if (perf_evlist__start_sb_thread(sb_evlist, target)) { 1687 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n"); 1688 opts->no_bpf_event = true; 1689 } 1690 1691 status = __cmd_top(&top); 1692 1693 if (!opts->no_bpf_event) 1694 perf_evlist__stop_sb_thread(sb_evlist); 1695 1696 out_delete_evlist: 1697 evlist__delete(top.evlist); 1698 perf_session__delete(top.session); 1699 1700 return status; 1701 } 1702