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/dso.h" 28 #include "util/evlist.h" 29 #include "util/evsel.h" 30 #include "util/evsel_config.h" 31 #include "util/event.h" 32 #include "util/machine.h" 33 #include "util/map.h" 34 #include "util/mmap.h" 35 #include "util/session.h" 36 #include "util/symbol.h" 37 #include "util/synthetic-events.h" 38 #include "util/top.h" 39 #include "util/util.h" 40 #include <linux/rbtree.h> 41 #include <subcmd/parse-options.h> 42 #include "util/parse-events.h" 43 #include "util/callchain.h" 44 #include "util/cpumap.h" 45 #include "util/sort.h" 46 #include "util/string2.h" 47 #include "util/term.h" 48 #include "util/intlist.h" 49 #include "util/parse-branch-options.h" 50 #include "arch/common.h" 51 #include "ui/ui.h" 52 53 #include "util/debug.h" 54 #include "util/ordered-events.h" 55 56 #include <assert.h> 57 #include <elf.h> 58 #include <fcntl.h> 59 60 #include <stdio.h> 61 #include <termios.h> 62 #include <unistd.h> 63 #include <inttypes.h> 64 65 #include <errno.h> 66 #include <time.h> 67 #include <sched.h> 68 #include <signal.h> 69 70 #include <sys/syscall.h> 71 #include <sys/ioctl.h> 72 #include <poll.h> 73 #include <sys/prctl.h> 74 #include <sys/wait.h> 75 #include <sys/uio.h> 76 #include <sys/utsname.h> 77 #include <sys/mman.h> 78 79 #include <linux/stringify.h> 80 #include <linux/time64.h> 81 #include <linux/types.h> 82 #include <linux/err.h> 83 84 #include <linux/ctype.h> 85 #include <perf/mmap.h> 86 87 static volatile int done; 88 static volatile int resize; 89 90 #define HEADER_LINE_NR 5 91 92 static void perf_top__update_print_entries(struct perf_top *top) 93 { 94 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR; 95 } 96 97 static void winch_sig(int sig __maybe_unused) 98 { 99 resize = 1; 100 } 101 102 static void perf_top__resize(struct perf_top *top) 103 { 104 get_term_dimensions(&top->winsize); 105 perf_top__update_print_entries(top); 106 } 107 108 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he) 109 { 110 struct evsel *evsel; 111 struct symbol *sym; 112 struct annotation *notes; 113 struct map *map; 114 int err = -1; 115 116 if (!he || !he->ms.sym) 117 return -1; 118 119 evsel = hists_to_evsel(he->hists); 120 121 sym = he->ms.sym; 122 map = he->ms.map; 123 124 /* 125 * We can't annotate with just /proc/kallsyms 126 */ 127 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS && 128 !dso__is_kcore(map->dso)) { 129 pr_err("Can't annotate %s: No vmlinux file was found in the " 130 "path\n", sym->name); 131 sleep(1); 132 return -1; 133 } 134 135 notes = symbol__annotation(sym); 136 pthread_mutex_lock(¬es->lock); 137 138 if (!symbol__hists(sym, top->evlist->core.nr_entries)) { 139 pthread_mutex_unlock(¬es->lock); 140 pr_err("Not enough memory for annotating '%s' symbol!\n", 141 sym->name); 142 sleep(1); 143 return err; 144 } 145 146 err = symbol__annotate(&he->ms, evsel, 0, &top->annotation_opts, NULL); 147 if (err == 0) { 148 top->sym_filter_entry = he; 149 } else { 150 char msg[BUFSIZ]; 151 symbol__strerror_disassemble(&he->ms, err, msg, sizeof(msg)); 152 pr_err("Couldn't annotate %s: %s\n", sym->name, msg); 153 } 154 155 pthread_mutex_unlock(¬es->lock); 156 return err; 157 } 158 159 static void __zero_source_counters(struct hist_entry *he) 160 { 161 struct symbol *sym = he->ms.sym; 162 symbol__annotate_zero_histograms(sym); 163 } 164 165 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip) 166 { 167 struct utsname uts; 168 int err = uname(&uts); 169 170 ui__warning("Out of bounds address found:\n\n" 171 "Addr: %" PRIx64 "\n" 172 "DSO: %s %c\n" 173 "Map: %" PRIx64 "-%" PRIx64 "\n" 174 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n" 175 "Arch: %s\n" 176 "Kernel: %s\n" 177 "Tools: %s\n\n" 178 "Not all samples will be on the annotation output.\n\n" 179 "Please report to linux-kernel@vger.kernel.org\n", 180 ip, map->dso->long_name, dso__symtab_origin(map->dso), 181 map->start, map->end, sym->start, sym->end, 182 sym->binding == STB_GLOBAL ? 'g' : 183 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name, 184 err ? "[unknown]" : uts.machine, 185 err ? "[unknown]" : uts.release, perf_version_string); 186 if (use_browser <= 0) 187 sleep(5); 188 189 map->erange_warned = true; 190 } 191 192 static void perf_top__record_precise_ip(struct perf_top *top, 193 struct hist_entry *he, 194 struct perf_sample *sample, 195 struct evsel *evsel, u64 ip) 196 { 197 struct annotation *notes; 198 struct symbol *sym = he->ms.sym; 199 int err = 0; 200 201 if (sym == NULL || (use_browser == 0 && 202 (top->sym_filter_entry == NULL || 203 top->sym_filter_entry->ms.sym != sym))) 204 return; 205 206 notes = symbol__annotation(sym); 207 208 if (pthread_mutex_trylock(¬es->lock)) 209 return; 210 211 err = hist_entry__inc_addr_samples(he, sample, evsel, ip); 212 213 pthread_mutex_unlock(¬es->lock); 214 215 if (unlikely(err)) { 216 /* 217 * This function is now called with he->hists->lock held. 218 * Release it before going to sleep. 219 */ 220 pthread_mutex_unlock(&he->hists->lock); 221 222 if (err == -ERANGE && !he->ms.map->erange_warned) 223 ui__warn_map_erange(he->ms.map, sym, ip); 224 else if (err == -ENOMEM) { 225 pr_err("Not enough memory for annotating '%s' symbol!\n", 226 sym->name); 227 sleep(1); 228 } 229 230 pthread_mutex_lock(&he->hists->lock); 231 } 232 } 233 234 static void perf_top__show_details(struct perf_top *top) 235 { 236 struct hist_entry *he = top->sym_filter_entry; 237 struct evsel *evsel; 238 struct annotation *notes; 239 struct symbol *symbol; 240 int more; 241 242 if (!he) 243 return; 244 245 evsel = hists_to_evsel(he->hists); 246 247 symbol = he->ms.sym; 248 notes = symbol__annotation(symbol); 249 250 pthread_mutex_lock(¬es->lock); 251 252 symbol__calc_percent(symbol, evsel); 253 254 if (notes->src == NULL) 255 goto out_unlock; 256 257 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name); 258 printf(" Events Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt); 259 260 more = symbol__annotate_printf(&he->ms, top->sym_evsel, &top->annotation_opts); 261 262 if (top->evlist->enabled) { 263 if (top->zero) 264 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx); 265 else 266 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx); 267 } 268 if (more != 0) 269 printf("%d lines not displayed, maybe increase display entries [e]\n", more); 270 out_unlock: 271 pthread_mutex_unlock(¬es->lock); 272 } 273 274 static void perf_top__resort_hists(struct perf_top *t) 275 { 276 struct evlist *evlist = t->evlist; 277 struct evsel *pos; 278 279 evlist__for_each_entry(evlist, pos) { 280 struct hists *hists = evsel__hists(pos); 281 282 /* 283 * unlink existing entries so that they can be linked 284 * in a correct order in hists__match() below. 285 */ 286 hists__unlink(hists); 287 288 if (evlist->enabled) { 289 if (t->zero) { 290 hists__delete_entries(hists); 291 } else { 292 hists__decay_entries(hists, t->hide_user_symbols, 293 t->hide_kernel_symbols); 294 } 295 } 296 297 hists__collapse_resort(hists, NULL); 298 299 /* Non-group events are considered as leader */ 300 if (symbol_conf.event_group && 301 !perf_evsel__is_group_leader(pos)) { 302 struct hists *leader_hists = evsel__hists(pos->leader); 303 304 hists__match(leader_hists, hists); 305 hists__link(leader_hists, hists); 306 } 307 } 308 309 evlist__for_each_entry(evlist, pos) { 310 perf_evsel__output_resort(pos, NULL); 311 } 312 } 313 314 static void perf_top__print_sym_table(struct perf_top *top) 315 { 316 char bf[160]; 317 int printed = 0; 318 const int win_width = top->winsize.ws_col - 1; 319 struct evsel *evsel = top->sym_evsel; 320 struct hists *hists = evsel__hists(evsel); 321 322 puts(CONSOLE_CLEAR); 323 324 perf_top__header_snprintf(top, bf, sizeof(bf)); 325 printf("%s\n", bf); 326 327 printf("%-*.*s\n", win_width, win_width, graph_dotted_line); 328 329 if (!top->record_opts.overwrite && 330 (hists->stats.nr_lost_warned != 331 hists->stats.nr_events[PERF_RECORD_LOST])) { 332 hists->stats.nr_lost_warned = 333 hists->stats.nr_events[PERF_RECORD_LOST]; 334 color_fprintf(stdout, PERF_COLOR_RED, 335 "WARNING: LOST %d chunks, Check IO/CPU overload", 336 hists->stats.nr_lost_warned); 337 ++printed; 338 } 339 340 if (top->sym_filter_entry) { 341 perf_top__show_details(top); 342 return; 343 } 344 345 perf_top__resort_hists(top); 346 347 hists__output_recalc_col_len(hists, top->print_entries - printed); 348 putchar('\n'); 349 hists__fprintf(hists, false, top->print_entries - printed, win_width, 350 top->min_percent, stdout, !symbol_conf.use_callchain); 351 } 352 353 static void prompt_integer(int *target, const char *msg) 354 { 355 char *buf = malloc(0), *p; 356 size_t dummy = 0; 357 int tmp; 358 359 fprintf(stdout, "\n%s: ", msg); 360 if (getline(&buf, &dummy, stdin) < 0) 361 return; 362 363 p = strchr(buf, '\n'); 364 if (p) 365 *p = 0; 366 367 p = buf; 368 while(*p) { 369 if (!isdigit(*p)) 370 goto out_free; 371 p++; 372 } 373 tmp = strtoul(buf, NULL, 10); 374 *target = tmp; 375 out_free: 376 free(buf); 377 } 378 379 static void prompt_percent(int *target, const char *msg) 380 { 381 int tmp = 0; 382 383 prompt_integer(&tmp, msg); 384 if (tmp >= 0 && tmp <= 100) 385 *target = tmp; 386 } 387 388 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg) 389 { 390 char *buf = malloc(0), *p; 391 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL; 392 struct hists *hists = evsel__hists(top->sym_evsel); 393 struct rb_node *next; 394 size_t dummy = 0; 395 396 /* zero counters of active symbol */ 397 if (syme) { 398 __zero_source_counters(syme); 399 top->sym_filter_entry = NULL; 400 } 401 402 fprintf(stdout, "\n%s: ", msg); 403 if (getline(&buf, &dummy, stdin) < 0) 404 goto out_free; 405 406 p = strchr(buf, '\n'); 407 if (p) 408 *p = 0; 409 410 next = rb_first_cached(&hists->entries); 411 while (next) { 412 n = rb_entry(next, struct hist_entry, rb_node); 413 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) { 414 found = n; 415 break; 416 } 417 next = rb_next(&n->rb_node); 418 } 419 420 if (!found) { 421 fprintf(stderr, "Sorry, %s is not active.\n", buf); 422 sleep(1); 423 } else 424 perf_top__parse_source(top, found); 425 426 out_free: 427 free(buf); 428 } 429 430 static void perf_top__print_mapped_keys(struct perf_top *top) 431 { 432 char *name = NULL; 433 434 if (top->sym_filter_entry) { 435 struct symbol *sym = top->sym_filter_entry->ms.sym; 436 name = sym->name; 437 } 438 439 fprintf(stdout, "\nMapped keys:\n"); 440 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs); 441 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries); 442 443 if (top->evlist->core.nr_entries > 1) 444 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel)); 445 446 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter); 447 448 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt); 449 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 450 fprintf(stdout, "\t[S] stop annotation.\n"); 451 452 fprintf(stdout, 453 "\t[K] hide kernel symbols. \t(%s)\n", 454 top->hide_kernel_symbols ? "yes" : "no"); 455 fprintf(stdout, 456 "\t[U] hide user symbols. \t(%s)\n", 457 top->hide_user_symbols ? "yes" : "no"); 458 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0); 459 fprintf(stdout, "\t[qQ] quit.\n"); 460 } 461 462 static int perf_top__key_mapped(struct perf_top *top, int c) 463 { 464 switch (c) { 465 case 'd': 466 case 'e': 467 case 'f': 468 case 'z': 469 case 'q': 470 case 'Q': 471 case 'K': 472 case 'U': 473 case 'F': 474 case 's': 475 case 'S': 476 return 1; 477 case 'E': 478 return top->evlist->core.nr_entries > 1 ? 1 : 0; 479 default: 480 break; 481 } 482 483 return 0; 484 } 485 486 static bool perf_top__handle_keypress(struct perf_top *top, int c) 487 { 488 bool ret = true; 489 490 if (!perf_top__key_mapped(top, c)) { 491 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 492 struct termios save; 493 494 perf_top__print_mapped_keys(top); 495 fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 496 fflush(stdout); 497 498 set_term_quiet_input(&save); 499 500 poll(&stdin_poll, 1, -1); 501 c = getc(stdin); 502 503 tcsetattr(0, TCSAFLUSH, &save); 504 if (!perf_top__key_mapped(top, c)) 505 return ret; 506 } 507 508 switch (c) { 509 case 'd': 510 prompt_integer(&top->delay_secs, "Enter display delay"); 511 if (top->delay_secs < 1) 512 top->delay_secs = 1; 513 break; 514 case 'e': 515 prompt_integer(&top->print_entries, "Enter display entries (lines)"); 516 if (top->print_entries == 0) { 517 perf_top__resize(top); 518 signal(SIGWINCH, winch_sig); 519 } else { 520 signal(SIGWINCH, SIG_DFL); 521 } 522 break; 523 case 'E': 524 if (top->evlist->core.nr_entries > 1) { 525 /* Select 0 as the default event: */ 526 int counter = 0; 527 528 fprintf(stderr, "\nAvailable events:"); 529 530 evlist__for_each_entry(top->evlist, top->sym_evsel) 531 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel)); 532 533 prompt_integer(&counter, "Enter details event counter"); 534 535 if (counter >= top->evlist->core.nr_entries) { 536 top->sym_evsel = evlist__first(top->evlist); 537 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel)); 538 sleep(1); 539 break; 540 } 541 evlist__for_each_entry(top->evlist, top->sym_evsel) 542 if (top->sym_evsel->idx == counter) 543 break; 544 } else 545 top->sym_evsel = evlist__first(top->evlist); 546 break; 547 case 'f': 548 prompt_integer(&top->count_filter, "Enter display event count filter"); 549 break; 550 case 'F': 551 prompt_percent(&top->annotation_opts.min_pcnt, 552 "Enter details display event filter (percent)"); 553 break; 554 case 'K': 555 top->hide_kernel_symbols = !top->hide_kernel_symbols; 556 break; 557 case 'q': 558 case 'Q': 559 printf("exiting.\n"); 560 if (top->dump_symtab) 561 perf_session__fprintf_dsos(top->session, stderr); 562 ret = false; 563 break; 564 case 's': 565 perf_top__prompt_symbol(top, "Enter details symbol"); 566 break; 567 case 'S': 568 if (!top->sym_filter_entry) 569 break; 570 else { 571 struct hist_entry *syme = top->sym_filter_entry; 572 573 top->sym_filter_entry = NULL; 574 __zero_source_counters(syme); 575 } 576 break; 577 case 'U': 578 top->hide_user_symbols = !top->hide_user_symbols; 579 break; 580 case 'z': 581 top->zero = !top->zero; 582 break; 583 default: 584 break; 585 } 586 587 return ret; 588 } 589 590 static void perf_top__sort_new_samples(void *arg) 591 { 592 struct perf_top *t = arg; 593 594 if (t->evlist->selected != NULL) 595 t->sym_evsel = t->evlist->selected; 596 597 perf_top__resort_hists(t); 598 599 if (t->lost || t->drop) 600 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n"); 601 } 602 603 static void stop_top(void) 604 { 605 session_done = 1; 606 done = 1; 607 } 608 609 static void *display_thread_tui(void *arg) 610 { 611 struct evsel *pos; 612 struct perf_top *top = arg; 613 const char *help = "For a higher level overview, try: perf top --sort comm,dso"; 614 struct hist_browser_timer hbt = { 615 .timer = perf_top__sort_new_samples, 616 .arg = top, 617 .refresh = top->delay_secs, 618 }; 619 620 /* In order to read symbols from other namespaces perf to needs to call 621 * setns(2). This isn't permitted if the struct_fs has multiple users. 622 * unshare(2) the fs so that we may continue to setns into namespaces 623 * that we're observing. 624 */ 625 unshare(CLONE_FS); 626 627 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0); 628 629 perf_top__sort_new_samples(top); 630 631 /* 632 * Initialize the uid_filter_str, in the future the TUI will allow 633 * Zooming in/out UIDs. For now just use whatever the user passed 634 * via --uid. 635 */ 636 evlist__for_each_entry(top->evlist, pos) { 637 struct hists *hists = evsel__hists(pos); 638 hists->uid_filter_str = top->record_opts.target.uid_str; 639 } 640 641 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, 642 top->min_percent, 643 &top->session->header.env, 644 !top->record_opts.overwrite, 645 &top->annotation_opts); 646 647 stop_top(); 648 return NULL; 649 } 650 651 static void display_sig(int sig __maybe_unused) 652 { 653 stop_top(); 654 } 655 656 static void display_setup_sig(void) 657 { 658 signal(SIGSEGV, sighandler_dump_stack); 659 signal(SIGFPE, sighandler_dump_stack); 660 signal(SIGINT, display_sig); 661 signal(SIGQUIT, display_sig); 662 signal(SIGTERM, display_sig); 663 } 664 665 static void *display_thread(void *arg) 666 { 667 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 668 struct termios save; 669 struct perf_top *top = arg; 670 int delay_msecs, c; 671 672 /* In order to read symbols from other namespaces perf to needs to call 673 * setns(2). This isn't permitted if the struct_fs has multiple users. 674 * unshare(2) the fs so that we may continue to setns into namespaces 675 * that we're observing. 676 */ 677 unshare(CLONE_FS); 678 679 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0); 680 681 display_setup_sig(); 682 pthread__unblock_sigwinch(); 683 repeat: 684 delay_msecs = top->delay_secs * MSEC_PER_SEC; 685 set_term_quiet_input(&save); 686 /* trash return*/ 687 getc(stdin); 688 689 while (!done) { 690 perf_top__print_sym_table(top); 691 /* 692 * Either timeout expired or we got an EINTR due to SIGWINCH, 693 * refresh screen in both cases. 694 */ 695 switch (poll(&stdin_poll, 1, delay_msecs)) { 696 case 0: 697 continue; 698 case -1: 699 if (errno == EINTR) 700 continue; 701 __fallthrough; 702 default: 703 c = getc(stdin); 704 tcsetattr(0, TCSAFLUSH, &save); 705 706 if (perf_top__handle_keypress(top, c)) 707 goto repeat; 708 stop_top(); 709 } 710 } 711 712 tcsetattr(0, TCSAFLUSH, &save); 713 return NULL; 714 } 715 716 static int hist_iter__top_callback(struct hist_entry_iter *iter, 717 struct addr_location *al, bool single, 718 void *arg) 719 { 720 struct perf_top *top = arg; 721 struct hist_entry *he = iter->he; 722 struct evsel *evsel = iter->evsel; 723 724 if (perf_hpp_list.sym && single) 725 perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr); 726 727 hist__account_cycles(iter->sample->branch_stack, al, iter->sample, 728 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY), 729 NULL); 730 return 0; 731 } 732 733 static void perf_event__process_sample(struct perf_tool *tool, 734 const union perf_event *event, 735 struct evsel *evsel, 736 struct perf_sample *sample, 737 struct machine *machine) 738 { 739 struct perf_top *top = container_of(tool, struct perf_top, tool); 740 struct addr_location al; 741 int err; 742 743 if (!machine && perf_guest) { 744 static struct intlist *seen; 745 746 if (!seen) 747 seen = intlist__new(NULL); 748 749 if (!intlist__has_entry(seen, sample->pid)) { 750 pr_err("Can't find guest [%d]'s kernel information\n", 751 sample->pid); 752 intlist__add(seen, sample->pid); 753 } 754 return; 755 } 756 757 if (!machine) { 758 pr_err("%u unprocessable samples recorded.\r", 759 top->session->evlist->stats.nr_unprocessable_samples++); 760 return; 761 } 762 763 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) 764 top->exact_samples++; 765 766 if (machine__resolve(machine, &al, sample) < 0) 767 return; 768 769 if (!machine->kptr_restrict_warned && 770 symbol_conf.kptr_restrict && 771 al.cpumode == PERF_RECORD_MISC_KERNEL) { 772 if (!perf_evlist__exclude_kernel(top->session->evlist)) { 773 ui__warning( 774 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 775 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" 776 "Kernel%s samples will not be resolved.\n", 777 al.map && map__has_symbols(al.map) ? 778 " modules" : ""); 779 if (use_browser <= 0) 780 sleep(5); 781 } 782 machine->kptr_restrict_warned = true; 783 } 784 785 if (al.sym == NULL && al.map != NULL) { 786 const char *msg = "Kernel samples will not be resolved.\n"; 787 /* 788 * As we do lazy loading of symtabs we only will know if the 789 * specified vmlinux file is invalid when we actually have a 790 * hit in kernel space and then try to load it. So if we get 791 * here and there are _no_ symbols in the DSO backing the 792 * kernel map, bail out. 793 * 794 * We may never get here, for instance, if we use -K/ 795 * --hide-kernel-symbols, even if the user specifies an 796 * invalid --vmlinux ;-) 797 */ 798 if (!machine->kptr_restrict_warned && !top->vmlinux_warned && 799 __map__is_kernel(al.map) && map__has_symbols(al.map)) { 800 if (symbol_conf.vmlinux_name) { 801 char serr[256]; 802 dso__strerror_load(al.map->dso, serr, sizeof(serr)); 803 ui__warning("The %s file can't be used: %s\n%s", 804 symbol_conf.vmlinux_name, serr, msg); 805 } else { 806 ui__warning("A vmlinux file was not found.\n%s", 807 msg); 808 } 809 810 if (use_browser <= 0) 811 sleep(5); 812 top->vmlinux_warned = true; 813 } 814 } 815 816 if (al.sym == NULL || !al.sym->idle) { 817 struct hists *hists = evsel__hists(evsel); 818 struct hist_entry_iter iter = { 819 .evsel = evsel, 820 .sample = sample, 821 .add_entry_cb = hist_iter__top_callback, 822 }; 823 824 if (symbol_conf.cumulate_callchain) 825 iter.ops = &hist_iter_cumulative; 826 else 827 iter.ops = &hist_iter_normal; 828 829 pthread_mutex_lock(&hists->lock); 830 831 err = hist_entry_iter__add(&iter, &al, top->max_stack, top); 832 if (err < 0) 833 pr_err("Problem incrementing symbol period, skipping event\n"); 834 835 pthread_mutex_unlock(&hists->lock); 836 } 837 838 addr_location__put(&al); 839 } 840 841 static void 842 perf_top__process_lost(struct perf_top *top, union perf_event *event, 843 struct evsel *evsel) 844 { 845 struct hists *hists = evsel__hists(evsel); 846 847 top->lost += event->lost.lost; 848 top->lost_total += event->lost.lost; 849 hists->stats.total_lost += event->lost.lost; 850 } 851 852 static void 853 perf_top__process_lost_samples(struct perf_top *top, 854 union perf_event *event, 855 struct evsel *evsel) 856 { 857 struct hists *hists = evsel__hists(evsel); 858 859 top->lost += event->lost_samples.lost; 860 top->lost_total += event->lost_samples.lost; 861 hists->stats.total_lost_samples += event->lost_samples.lost; 862 } 863 864 static u64 last_timestamp; 865 866 static void perf_top__mmap_read_idx(struct perf_top *top, int idx) 867 { 868 struct record_opts *opts = &top->record_opts; 869 struct evlist *evlist = top->evlist; 870 struct mmap *md; 871 union perf_event *event; 872 873 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx]; 874 if (perf_mmap__read_init(&md->core) < 0) 875 return; 876 877 while ((event = perf_mmap__read_event(&md->core)) != NULL) { 878 int ret; 879 880 ret = perf_evlist__parse_sample_timestamp(evlist, event, &last_timestamp); 881 if (ret && ret != -1) 882 break; 883 884 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0); 885 if (ret) 886 break; 887 888 perf_mmap__consume(&md->core); 889 890 if (top->qe.rotate) { 891 pthread_mutex_lock(&top->qe.mutex); 892 top->qe.rotate = false; 893 pthread_cond_signal(&top->qe.cond); 894 pthread_mutex_unlock(&top->qe.mutex); 895 } 896 } 897 898 perf_mmap__read_done(&md->core); 899 } 900 901 static void perf_top__mmap_read(struct perf_top *top) 902 { 903 bool overwrite = top->record_opts.overwrite; 904 struct evlist *evlist = top->evlist; 905 int i; 906 907 if (overwrite) 908 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING); 909 910 for (i = 0; i < top->evlist->core.nr_mmaps; i++) 911 perf_top__mmap_read_idx(top, i); 912 913 if (overwrite) { 914 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); 915 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); 916 } 917 } 918 919 /* 920 * Check per-event overwrite term. 921 * perf top should support consistent term for all events. 922 * - All events don't have per-event term 923 * E.g. "cpu/cpu-cycles/,cpu/instructions/" 924 * Nothing change, return 0. 925 * - All events have same per-event term 926 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/ 927 * Using the per-event setting to replace the opts->overwrite if 928 * they are different, then return 0. 929 * - Events have different per-event term 930 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/" 931 * Return -1 932 * - Some of the event set per-event term, but some not. 933 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/" 934 * Return -1 935 */ 936 static int perf_top__overwrite_check(struct perf_top *top) 937 { 938 struct record_opts *opts = &top->record_opts; 939 struct evlist *evlist = top->evlist; 940 struct perf_evsel_config_term *term; 941 struct list_head *config_terms; 942 struct evsel *evsel; 943 int set, overwrite = -1; 944 945 evlist__for_each_entry(evlist, evsel) { 946 set = -1; 947 config_terms = &evsel->config_terms; 948 list_for_each_entry(term, config_terms, list) { 949 if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE) 950 set = term->val.overwrite ? 1 : 0; 951 } 952 953 /* no term for current and previous event (likely) */ 954 if ((overwrite < 0) && (set < 0)) 955 continue; 956 957 /* has term for both current and previous event, compare */ 958 if ((overwrite >= 0) && (set >= 0) && (overwrite != set)) 959 return -1; 960 961 /* no term for current event but has term for previous one */ 962 if ((overwrite >= 0) && (set < 0)) 963 return -1; 964 965 /* has term for current event */ 966 if ((overwrite < 0) && (set >= 0)) { 967 /* if it's first event, set overwrite */ 968 if (evsel == evlist__first(evlist)) 969 overwrite = set; 970 else 971 return -1; 972 } 973 } 974 975 if ((overwrite >= 0) && (opts->overwrite != overwrite)) 976 opts->overwrite = overwrite; 977 978 return 0; 979 } 980 981 static int perf_top_overwrite_fallback(struct perf_top *top, 982 struct evsel *evsel) 983 { 984 struct record_opts *opts = &top->record_opts; 985 struct evlist *evlist = top->evlist; 986 struct evsel *counter; 987 988 if (!opts->overwrite) 989 return 0; 990 991 /* only fall back when first event fails */ 992 if (evsel != evlist__first(evlist)) 993 return 0; 994 995 evlist__for_each_entry(evlist, counter) 996 counter->core.attr.write_backward = false; 997 opts->overwrite = false; 998 pr_debug2("fall back to non-overwrite mode\n"); 999 return 1; 1000 } 1001 1002 static int perf_top__start_counters(struct perf_top *top) 1003 { 1004 char msg[BUFSIZ]; 1005 struct evsel *counter; 1006 struct evlist *evlist = top->evlist; 1007 struct record_opts *opts = &top->record_opts; 1008 1009 if (perf_top__overwrite_check(top)) { 1010 ui__error("perf top only support consistent per-event " 1011 "overwrite setting for all events\n"); 1012 goto out_err; 1013 } 1014 1015 perf_evlist__config(evlist, opts, &callchain_param); 1016 1017 evlist__for_each_entry(evlist, counter) { 1018 try_again: 1019 if (evsel__open(counter, top->evlist->core.cpus, 1020 top->evlist->core.threads) < 0) { 1021 1022 /* 1023 * Specially handle overwrite fall back. 1024 * Because perf top is the only tool which has 1025 * overwrite mode by default, support 1026 * both overwrite and non-overwrite mode, and 1027 * require consistent mode for all events. 1028 * 1029 * May move it to generic code with more tools 1030 * have similar attribute. 1031 */ 1032 if (perf_missing_features.write_backward && 1033 perf_top_overwrite_fallback(top, counter)) 1034 goto try_again; 1035 1036 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 1037 if (verbose > 0) 1038 ui__warning("%s\n", msg); 1039 goto try_again; 1040 } 1041 1042 perf_evsel__open_strerror(counter, &opts->target, 1043 errno, msg, sizeof(msg)); 1044 ui__error("%s\n", msg); 1045 goto out_err; 1046 } 1047 } 1048 1049 if (evlist__mmap(evlist, opts->mmap_pages) < 0) { 1050 ui__error("Failed to mmap with %d (%s)\n", 1051 errno, str_error_r(errno, msg, sizeof(msg))); 1052 goto out_err; 1053 } 1054 1055 return 0; 1056 1057 out_err: 1058 return -1; 1059 } 1060 1061 static int callchain_param__setup_sample_type(struct callchain_param *callchain) 1062 { 1063 if (callchain->mode != CHAIN_NONE) { 1064 if (callchain_register_param(callchain) < 0) { 1065 ui__error("Can't register callchain params.\n"); 1066 return -EINVAL; 1067 } 1068 } 1069 1070 return 0; 1071 } 1072 1073 static struct ordered_events *rotate_queues(struct perf_top *top) 1074 { 1075 struct ordered_events *in = top->qe.in; 1076 1077 if (top->qe.in == &top->qe.data[1]) 1078 top->qe.in = &top->qe.data[0]; 1079 else 1080 top->qe.in = &top->qe.data[1]; 1081 1082 return in; 1083 } 1084 1085 static void *process_thread(void *arg) 1086 { 1087 struct perf_top *top = arg; 1088 1089 while (!done) { 1090 struct ordered_events *out, *in = top->qe.in; 1091 1092 if (!in->nr_events) { 1093 usleep(100); 1094 continue; 1095 } 1096 1097 out = rotate_queues(top); 1098 1099 pthread_mutex_lock(&top->qe.mutex); 1100 top->qe.rotate = true; 1101 pthread_cond_wait(&top->qe.cond, &top->qe.mutex); 1102 pthread_mutex_unlock(&top->qe.mutex); 1103 1104 if (ordered_events__flush(out, OE_FLUSH__TOP)) 1105 pr_err("failed to process events\n"); 1106 } 1107 1108 return NULL; 1109 } 1110 1111 /* 1112 * Allow only 'top->delay_secs' seconds behind samples. 1113 */ 1114 static int should_drop(struct ordered_event *qevent, struct perf_top *top) 1115 { 1116 union perf_event *event = qevent->event; 1117 u64 delay_timestamp; 1118 1119 if (event->header.type != PERF_RECORD_SAMPLE) 1120 return false; 1121 1122 delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC; 1123 return delay_timestamp < last_timestamp; 1124 } 1125 1126 static int deliver_event(struct ordered_events *qe, 1127 struct ordered_event *qevent) 1128 { 1129 struct perf_top *top = qe->data; 1130 struct evlist *evlist = top->evlist; 1131 struct perf_session *session = top->session; 1132 union perf_event *event = qevent->event; 1133 struct perf_sample sample; 1134 struct evsel *evsel; 1135 struct machine *machine; 1136 int ret = -1; 1137 1138 if (should_drop(qevent, top)) { 1139 top->drop++; 1140 top->drop_total++; 1141 return 0; 1142 } 1143 1144 ret = perf_evlist__parse_sample(evlist, event, &sample); 1145 if (ret) { 1146 pr_err("Can't parse sample, err = %d\n", ret); 1147 goto next_event; 1148 } 1149 1150 evsel = perf_evlist__id2evsel(session->evlist, sample.id); 1151 assert(evsel != NULL); 1152 1153 if (event->header.type == PERF_RECORD_SAMPLE) { 1154 if (evswitch__discard(&top->evswitch, evsel)) 1155 return 0; 1156 ++top->samples; 1157 } 1158 1159 switch (sample.cpumode) { 1160 case PERF_RECORD_MISC_USER: 1161 ++top->us_samples; 1162 if (top->hide_user_symbols) 1163 goto next_event; 1164 machine = &session->machines.host; 1165 break; 1166 case PERF_RECORD_MISC_KERNEL: 1167 ++top->kernel_samples; 1168 if (top->hide_kernel_symbols) 1169 goto next_event; 1170 machine = &session->machines.host; 1171 break; 1172 case PERF_RECORD_MISC_GUEST_KERNEL: 1173 ++top->guest_kernel_samples; 1174 machine = perf_session__find_machine(session, 1175 sample.pid); 1176 break; 1177 case PERF_RECORD_MISC_GUEST_USER: 1178 ++top->guest_us_samples; 1179 /* 1180 * TODO: we don't process guest user from host side 1181 * except simple counting. 1182 */ 1183 goto next_event; 1184 default: 1185 if (event->header.type == PERF_RECORD_SAMPLE) 1186 goto next_event; 1187 machine = &session->machines.host; 1188 break; 1189 } 1190 1191 if (event->header.type == PERF_RECORD_SAMPLE) { 1192 perf_event__process_sample(&top->tool, event, evsel, 1193 &sample, machine); 1194 } else if (event->header.type == PERF_RECORD_LOST) { 1195 perf_top__process_lost(top, event, evsel); 1196 } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) { 1197 perf_top__process_lost_samples(top, event, evsel); 1198 } else if (event->header.type < PERF_RECORD_MAX) { 1199 hists__inc_nr_events(evsel__hists(evsel), event->header.type); 1200 machine__process_event(machine, event, &sample); 1201 } else 1202 ++session->evlist->stats.nr_unknown_events; 1203 1204 ret = 0; 1205 next_event: 1206 return ret; 1207 } 1208 1209 static void init_process_thread(struct perf_top *top) 1210 { 1211 ordered_events__init(&top->qe.data[0], deliver_event, top); 1212 ordered_events__init(&top->qe.data[1], deliver_event, top); 1213 ordered_events__set_copy_on_queue(&top->qe.data[0], true); 1214 ordered_events__set_copy_on_queue(&top->qe.data[1], true); 1215 top->qe.in = &top->qe.data[0]; 1216 pthread_mutex_init(&top->qe.mutex, NULL); 1217 pthread_cond_init(&top->qe.cond, NULL); 1218 } 1219 1220 static int __cmd_top(struct perf_top *top) 1221 { 1222 struct record_opts *opts = &top->record_opts; 1223 pthread_t thread, thread_process; 1224 int ret; 1225 1226 if (!top->annotation_opts.objdump_path) { 1227 ret = perf_env__lookup_objdump(&top->session->header.env, 1228 &top->annotation_opts.objdump_path); 1229 if (ret) 1230 return ret; 1231 } 1232 1233 ret = callchain_param__setup_sample_type(&callchain_param); 1234 if (ret) 1235 return ret; 1236 1237 if (perf_session__register_idle_thread(top->session) < 0) 1238 return ret; 1239 1240 if (top->nr_threads_synthesize > 1) 1241 perf_set_multithreaded(); 1242 1243 init_process_thread(top); 1244 1245 if (opts->record_namespaces) 1246 top->tool.namespace_events = true; 1247 1248 ret = perf_event__synthesize_bpf_events(top->session, perf_event__process, 1249 &top->session->machines.host, 1250 &top->record_opts); 1251 if (ret < 0) 1252 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n"); 1253 1254 machine__synthesize_threads(&top->session->machines.host, &opts->target, 1255 top->evlist->core.threads, false, 1256 top->nr_threads_synthesize); 1257 1258 if (top->nr_threads_synthesize > 1) 1259 perf_set_singlethreaded(); 1260 1261 if (perf_hpp_list.socket) { 1262 ret = perf_env__read_cpu_topology_map(&perf_env); 1263 if (ret < 0) { 1264 char errbuf[BUFSIZ]; 1265 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf)); 1266 1267 ui__error("Could not read the CPU topology map: %s\n", err); 1268 return ret; 1269 } 1270 } 1271 1272 ret = perf_top__start_counters(top); 1273 if (ret) 1274 return ret; 1275 1276 top->session->evlist = top->evlist; 1277 perf_session__set_id_hdr_size(top->session); 1278 1279 /* 1280 * When perf is starting the traced process, all the events (apart from 1281 * group members) have enable_on_exec=1 set, so don't spoil it by 1282 * prematurely enabling them. 1283 * 1284 * XXX 'top' still doesn't start workloads like record, trace, but should, 1285 * so leave the check here. 1286 */ 1287 if (!target__none(&opts->target)) 1288 evlist__enable(top->evlist); 1289 1290 ret = -1; 1291 if (pthread_create(&thread_process, NULL, process_thread, top)) { 1292 ui__error("Could not create process thread.\n"); 1293 return ret; 1294 } 1295 1296 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : 1297 display_thread), top)) { 1298 ui__error("Could not create display thread.\n"); 1299 goto out_join_thread; 1300 } 1301 1302 if (top->realtime_prio) { 1303 struct sched_param param; 1304 1305 param.sched_priority = top->realtime_prio; 1306 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 1307 ui__error("Could not set realtime priority.\n"); 1308 goto out_join; 1309 } 1310 } 1311 1312 /* Wait for a minimal set of events before starting the snapshot */ 1313 evlist__poll(top->evlist, 100); 1314 1315 perf_top__mmap_read(top); 1316 1317 while (!done) { 1318 u64 hits = top->samples; 1319 1320 perf_top__mmap_read(top); 1321 1322 if (opts->overwrite || (hits == top->samples)) 1323 ret = evlist__poll(top->evlist, 100); 1324 1325 if (resize) { 1326 perf_top__resize(top); 1327 resize = 0; 1328 } 1329 } 1330 1331 ret = 0; 1332 out_join: 1333 pthread_join(thread, NULL); 1334 out_join_thread: 1335 pthread_cond_signal(&top->qe.cond); 1336 pthread_join(thread_process, NULL); 1337 return ret; 1338 } 1339 1340 static int 1341 callchain_opt(const struct option *opt, const char *arg, int unset) 1342 { 1343 symbol_conf.use_callchain = true; 1344 return record_callchain_opt(opt, arg, unset); 1345 } 1346 1347 static int 1348 parse_callchain_opt(const struct option *opt, const char *arg, int unset) 1349 { 1350 struct callchain_param *callchain = opt->value; 1351 1352 callchain->enabled = !unset; 1353 callchain->record_mode = CALLCHAIN_FP; 1354 1355 /* 1356 * --no-call-graph 1357 */ 1358 if (unset) { 1359 symbol_conf.use_callchain = false; 1360 callchain->record_mode = CALLCHAIN_NONE; 1361 return 0; 1362 } 1363 1364 return parse_callchain_top_opt(arg); 1365 } 1366 1367 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused) 1368 { 1369 if (!strcmp(var, "top.call-graph")) { 1370 var = "call-graph.record-mode"; 1371 return perf_default_config(var, value, cb); 1372 } 1373 if (!strcmp(var, "top.children")) { 1374 symbol_conf.cumulate_callchain = perf_config_bool(var, value); 1375 return 0; 1376 } 1377 1378 return 0; 1379 } 1380 1381 static int 1382 parse_percent_limit(const struct option *opt, const char *arg, 1383 int unset __maybe_unused) 1384 { 1385 struct perf_top *top = opt->value; 1386 1387 top->min_percent = strtof(arg, NULL); 1388 return 0; 1389 } 1390 1391 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP 1392 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function"; 1393 1394 int cmd_top(int argc, const char **argv) 1395 { 1396 char errbuf[BUFSIZ]; 1397 struct perf_top top = { 1398 .count_filter = 5, 1399 .delay_secs = 2, 1400 .record_opts = { 1401 .mmap_pages = UINT_MAX, 1402 .user_freq = UINT_MAX, 1403 .user_interval = ULLONG_MAX, 1404 .freq = 4000, /* 4 KHz */ 1405 .target = { 1406 .uses_mmap = true, 1407 }, 1408 /* 1409 * FIXME: This will lose PERF_RECORD_MMAP and other metadata 1410 * when we pause, fix that and reenable. Probably using a 1411 * separate evlist with a dummy event, i.e. a non-overwrite 1412 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE 1413 * stays in overwrite mode. -acme 1414 * */ 1415 .overwrite = 0, 1416 .sample_time = true, 1417 .sample_time_set = true, 1418 }, 1419 .max_stack = sysctl__max_stack(), 1420 .annotation_opts = annotation__default_options, 1421 .nr_threads_synthesize = UINT_MAX, 1422 }; 1423 struct record_opts *opts = &top.record_opts; 1424 struct target *target = &opts->target; 1425 const struct option options[] = { 1426 OPT_CALLBACK('e', "event", &top.evlist, "event", 1427 "event selector. use 'perf list' to list available events", 1428 parse_events_option), 1429 OPT_U64('c', "count", &opts->user_interval, "event period to sample"), 1430 OPT_STRING('p', "pid", &target->pid, "pid", 1431 "profile events on existing process id"), 1432 OPT_STRING('t', "tid", &target->tid, "tid", 1433 "profile events on existing thread id"), 1434 OPT_BOOLEAN('a', "all-cpus", &target->system_wide, 1435 "system-wide collection from all CPUs"), 1436 OPT_STRING('C', "cpu", &target->cpu_list, "cpu", 1437 "list of cpus to monitor"), 1438 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 1439 "file", "vmlinux pathname"), 1440 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux, 1441 "don't load vmlinux even if found"), 1442 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name, 1443 "file", "kallsyms pathname"), 1444 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, 1445 "hide kernel symbols"), 1446 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages", 1447 "number of mmap data pages", 1448 perf_evlist__parse_mmap_pages), 1449 OPT_INTEGER('r', "realtime", &top.realtime_prio, 1450 "collect data with this RT SCHED_FIFO priority"), 1451 OPT_INTEGER('d', "delay", &top.delay_secs, 1452 "number of seconds to delay between refreshes"), 1453 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab, 1454 "dump the symbol table used for profiling"), 1455 OPT_INTEGER('f', "count-filter", &top.count_filter, 1456 "only display functions with more events than this"), 1457 OPT_BOOLEAN(0, "group", &opts->group, 1458 "put the counters into a counter group"), 1459 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit, 1460 "child tasks do not inherit counters"), 1461 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name", 1462 "symbol to annotate"), 1463 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"), 1464 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'", 1465 "profile at this frequency", 1466 record__parse_freq), 1467 OPT_INTEGER('E', "entries", &top.print_entries, 1468 "display this many functions"), 1469 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, 1470 "hide user symbols"), 1471 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"), 1472 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"), 1473 OPT_INCR('v', "verbose", &verbose, 1474 "be more verbose (show counter open errors, etc)"), 1475 OPT_STRING('s', "sort", &sort_order, "key[,key2...]", 1476 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..." 1477 " Please refer the man page for the complete list."), 1478 OPT_STRING(0, "fields", &field_order, "key[,keys...]", 1479 "output field(s): overhead, period, sample plus all of sort keys"), 1480 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, 1481 "Show a column with the number of samples"), 1482 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, 1483 NULL, "enables call-graph recording and display", 1484 &callchain_opt), 1485 OPT_CALLBACK(0, "call-graph", &callchain_param, 1486 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]", 1487 top_callchain_help, &parse_callchain_opt), 1488 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain, 1489 "Accumulate callchains of children and show total overhead as well"), 1490 OPT_INTEGER(0, "max-stack", &top.max_stack, 1491 "Set the maximum stack depth when parsing the callchain. " 1492 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 1493 OPT_CALLBACK(0, "ignore-callees", NULL, "regex", 1494 "ignore callees of these functions in call graphs", 1495 report_parse_ignore_callees_opt), 1496 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, 1497 "Show a column with the sum of periods"), 1498 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", 1499 "only consider symbols in these dsos"), 1500 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]", 1501 "only consider symbols in these comms"), 1502 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", 1503 "only consider these symbols"), 1504 OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src, 1505 "Interleave source code with assembly code (default)"), 1506 OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw, 1507 "Display raw encoding of assembly instructions (default)"), 1508 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, 1509 "Enable kernel symbol demangling"), 1510 OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"), 1511 OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path", 1512 "objdump binary to use for disassembly and annotations"), 1513 OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style", 1514 "Specify disassembler style (e.g. -M intel for intel syntax)"), 1515 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"), 1516 OPT_CALLBACK(0, "percent-limit", &top, "percent", 1517 "Don't show entries under that percent", parse_percent_limit), 1518 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute", 1519 "How to display percentage of filtered entries", parse_filter_percentage), 1520 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str, 1521 "width[,width...]", 1522 "don't try to adjust column width, use these fixed values"), 1523 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, 1524 "per thread proc mmap processing timeout in ms"), 1525 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack, 1526 "branch any", "sample any taken branches", 1527 parse_branch_stack), 1528 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack, 1529 "branch filter mask", "branch stack filter modes", 1530 parse_branch_stack), 1531 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace, 1532 "Show raw trace event output (do not use print fmt or plugins)"), 1533 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy, 1534 "Show entries in a hierarchy"), 1535 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite, 1536 "Use a backward ring buffer, default: no"), 1537 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"), 1538 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize, 1539 "number of thread to run event synthesize"), 1540 OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces, 1541 "Record namespaces events"), 1542 OPTS_EVSWITCH(&top.evswitch), 1543 OPT_END() 1544 }; 1545 struct evlist *sb_evlist = NULL; 1546 const char * const top_usage[] = { 1547 "perf top [<options>]", 1548 NULL 1549 }; 1550 int status = hists__init(); 1551 1552 if (status < 0) 1553 return status; 1554 1555 top.annotation_opts.min_pcnt = 5; 1556 top.annotation_opts.context = 4; 1557 1558 top.evlist = evlist__new(); 1559 if (top.evlist == NULL) 1560 return -ENOMEM; 1561 1562 status = perf_config(perf_top_config, &top); 1563 if (status) 1564 return status; 1565 /* 1566 * Since the per arch annotation init routine may need the cpuid, read 1567 * it here, since we are not getting this from the perf.data header. 1568 */ 1569 status = perf_env__read_cpuid(&perf_env); 1570 if (status) { 1571 /* 1572 * Some arches do not provide a get_cpuid(), so just use pr_debug, otherwise 1573 * warn the user explicitely. 1574 */ 1575 eprintf(status == ENOSYS ? 1 : 0, verbose, 1576 "Couldn't read the cpuid for this machine: %s\n", 1577 str_error_r(errno, errbuf, sizeof(errbuf))); 1578 } 1579 top.evlist->env = &perf_env; 1580 1581 argc = parse_options(argc, argv, options, top_usage, 0); 1582 if (argc) 1583 usage_with_options(top_usage, options); 1584 1585 if (!top.evlist->core.nr_entries && 1586 perf_evlist__add_default(top.evlist) < 0) { 1587 pr_err("Not enough memory for event selector list\n"); 1588 goto out_delete_evlist; 1589 } 1590 1591 status = evswitch__init(&top.evswitch, top.evlist, stderr); 1592 if (status) 1593 goto out_delete_evlist; 1594 1595 if (symbol_conf.report_hierarchy) { 1596 /* disable incompatible options */ 1597 symbol_conf.event_group = false; 1598 symbol_conf.cumulate_callchain = false; 1599 1600 if (field_order) { 1601 pr_err("Error: --hierarchy and --fields options cannot be used together\n"); 1602 parse_options_usage(top_usage, options, "fields", 0); 1603 parse_options_usage(NULL, options, "hierarchy", 0); 1604 goto out_delete_evlist; 1605 } 1606 } 1607 1608 if (opts->branch_stack && callchain_param.enabled) 1609 symbol_conf.show_branchflag_count = true; 1610 1611 sort__mode = SORT_MODE__TOP; 1612 /* display thread wants entries to be collapsed in a different tree */ 1613 perf_hpp_list.need_collapse = 1; 1614 1615 if (top.use_stdio) 1616 use_browser = 0; 1617 else if (top.use_tui) 1618 use_browser = 1; 1619 1620 setup_browser(false); 1621 1622 if (setup_sorting(top.evlist) < 0) { 1623 if (sort_order) 1624 parse_options_usage(top_usage, options, "s", 1); 1625 if (field_order) 1626 parse_options_usage(sort_order ? NULL : top_usage, 1627 options, "fields", 0); 1628 goto out_delete_evlist; 1629 } 1630 1631 status = target__validate(target); 1632 if (status) { 1633 target__strerror(target, status, errbuf, BUFSIZ); 1634 ui__warning("%s\n", errbuf); 1635 } 1636 1637 status = target__parse_uid(target); 1638 if (status) { 1639 int saved_errno = errno; 1640 1641 target__strerror(target, status, errbuf, BUFSIZ); 1642 ui__error("%s\n", errbuf); 1643 1644 status = -saved_errno; 1645 goto out_delete_evlist; 1646 } 1647 1648 if (target__none(target)) 1649 target->system_wide = true; 1650 1651 if (perf_evlist__create_maps(top.evlist, target) < 0) { 1652 ui__error("Couldn't create thread/CPU maps: %s\n", 1653 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf))); 1654 goto out_delete_evlist; 1655 } 1656 1657 if (top.delay_secs < 1) 1658 top.delay_secs = 1; 1659 1660 if (record_opts__config(opts)) { 1661 status = -EINVAL; 1662 goto out_delete_evlist; 1663 } 1664 1665 top.sym_evsel = evlist__first(top.evlist); 1666 1667 if (!callchain_param.enabled) { 1668 symbol_conf.cumulate_callchain = false; 1669 perf_hpp__cancel_cumulate(); 1670 } 1671 1672 if (symbol_conf.cumulate_callchain && !callchain_param.order_set) 1673 callchain_param.order = ORDER_CALLER; 1674 1675 status = symbol__annotation_init(); 1676 if (status < 0) 1677 goto out_delete_evlist; 1678 1679 annotation_config__init(); 1680 1681 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); 1682 status = symbol__init(NULL); 1683 if (status < 0) 1684 goto out_delete_evlist; 1685 1686 sort__setup_elide(stdout); 1687 1688 get_term_dimensions(&top.winsize); 1689 if (top.print_entries == 0) { 1690 perf_top__update_print_entries(&top); 1691 signal(SIGWINCH, winch_sig); 1692 } 1693 1694 top.session = perf_session__new(NULL, false, NULL); 1695 if (IS_ERR(top.session)) { 1696 status = PTR_ERR(top.session); 1697 goto out_delete_evlist; 1698 } 1699 1700 if (!top.record_opts.no_bpf_event) 1701 bpf_event__add_sb_event(&sb_evlist, &perf_env); 1702 1703 if (perf_evlist__start_sb_thread(sb_evlist, target)) { 1704 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n"); 1705 opts->no_bpf_event = true; 1706 } 1707 1708 status = __cmd_top(&top); 1709 1710 if (!opts->no_bpf_event) 1711 perf_evlist__stop_sb_thread(sb_evlist); 1712 1713 out_delete_evlist: 1714 evlist__delete(top.evlist); 1715 perf_session__delete(top.session); 1716 1717 return status; 1718 } 1719