1 /* 2 * builtin-top.c 3 * 4 * Builtin top command: Display a continuously updated profile of 5 * any workload, CPU or specific PID. 6 * 7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com> 8 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 9 * 10 * Improvements and fixes by: 11 * 12 * Arjan van de Ven <arjan@linux.intel.com> 13 * Yanmin Zhang <yanmin.zhang@intel.com> 14 * Wu Fengguang <fengguang.wu@intel.com> 15 * Mike Galbraith <efault@gmx.de> 16 * Paul Mackerras <paulus@samba.org> 17 * 18 * Released under the GPL v2. (and only v2, not any later version) 19 */ 20 #include "builtin.h" 21 22 #include "perf.h" 23 24 #include "util/annotate.h" 25 #include "util/config.h" 26 #include "util/color.h" 27 #include "util/drv_configs.h" 28 #include "util/evlist.h" 29 #include "util/evsel.h" 30 #include "util/event.h" 31 #include "util/machine.h" 32 #include "util/session.h" 33 #include "util/symbol.h" 34 #include "util/thread.h" 35 #include "util/thread_map.h" 36 #include "util/top.h" 37 #include <linux/rbtree.h> 38 #include <subcmd/parse-options.h> 39 #include "util/parse-events.h" 40 #include "util/cpumap.h" 41 #include "util/xyarray.h" 42 #include "util/sort.h" 43 #include "util/term.h" 44 #include "util/intlist.h" 45 #include "util/parse-branch-options.h" 46 #include "arch/common.h" 47 48 #include "util/debug.h" 49 50 #include <assert.h> 51 #include <elf.h> 52 #include <fcntl.h> 53 54 #include <stdio.h> 55 #include <termios.h> 56 #include <unistd.h> 57 #include <inttypes.h> 58 59 #include <errno.h> 60 #include <time.h> 61 #include <sched.h> 62 #include <signal.h> 63 64 #include <sys/syscall.h> 65 #include <sys/ioctl.h> 66 #include <poll.h> 67 #include <sys/prctl.h> 68 #include <sys/wait.h> 69 #include <sys/uio.h> 70 #include <sys/utsname.h> 71 #include <sys/mman.h> 72 73 #include <linux/stringify.h> 74 #include <linux/time64.h> 75 #include <linux/types.h> 76 77 #include "sane_ctype.h" 78 79 static volatile int done; 80 static volatile int resize; 81 82 #define HEADER_LINE_NR 5 83 84 static void perf_top__update_print_entries(struct perf_top *top) 85 { 86 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR; 87 } 88 89 static void winch_sig(int sig __maybe_unused) 90 { 91 resize = 1; 92 } 93 94 static void perf_top__resize(struct perf_top *top) 95 { 96 get_term_dimensions(&top->winsize); 97 perf_top__update_print_entries(top); 98 } 99 100 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he) 101 { 102 struct perf_evsel *evsel = hists_to_evsel(he->hists); 103 struct symbol *sym; 104 struct annotation *notes; 105 struct map *map; 106 int err = -1; 107 108 if (!he || !he->ms.sym) 109 return -1; 110 111 sym = he->ms.sym; 112 map = he->ms.map; 113 114 /* 115 * We can't annotate with just /proc/kallsyms 116 */ 117 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS && 118 !dso__is_kcore(map->dso)) { 119 pr_err("Can't annotate %s: No vmlinux file was found in the " 120 "path\n", sym->name); 121 sleep(1); 122 return -1; 123 } 124 125 notes = symbol__annotation(sym); 126 pthread_mutex_lock(¬es->lock); 127 128 if (!symbol__hists(sym, top->evlist->nr_entries)) { 129 pthread_mutex_unlock(¬es->lock); 130 pr_err("Not enough memory for annotating '%s' symbol!\n", 131 sym->name); 132 sleep(1); 133 return err; 134 } 135 136 err = symbol__annotate(sym, map, evsel, 0, &top->annotation_opts, NULL); 137 if (err == 0) { 138 top->sym_filter_entry = he; 139 } else { 140 char msg[BUFSIZ]; 141 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg)); 142 pr_err("Couldn't annotate %s: %s\n", sym->name, msg); 143 } 144 145 pthread_mutex_unlock(¬es->lock); 146 return err; 147 } 148 149 static void __zero_source_counters(struct hist_entry *he) 150 { 151 struct symbol *sym = he->ms.sym; 152 symbol__annotate_zero_histograms(sym); 153 } 154 155 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip) 156 { 157 struct utsname uts; 158 int err = uname(&uts); 159 160 ui__warning("Out of bounds address found:\n\n" 161 "Addr: %" PRIx64 "\n" 162 "DSO: %s %c\n" 163 "Map: %" PRIx64 "-%" PRIx64 "\n" 164 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n" 165 "Arch: %s\n" 166 "Kernel: %s\n" 167 "Tools: %s\n\n" 168 "Not all samples will be on the annotation output.\n\n" 169 "Please report to linux-kernel@vger.kernel.org\n", 170 ip, map->dso->long_name, dso__symtab_origin(map->dso), 171 map->start, map->end, sym->start, sym->end, 172 sym->binding == STB_GLOBAL ? 'g' : 173 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name, 174 err ? "[unknown]" : uts.machine, 175 err ? "[unknown]" : uts.release, perf_version_string); 176 if (use_browser <= 0) 177 sleep(5); 178 179 map->erange_warned = true; 180 } 181 182 static void perf_top__record_precise_ip(struct perf_top *top, 183 struct hist_entry *he, 184 struct perf_sample *sample, 185 struct perf_evsel *evsel, u64 ip) 186 { 187 struct annotation *notes; 188 struct symbol *sym = he->ms.sym; 189 int err = 0; 190 191 if (sym == NULL || (use_browser == 0 && 192 (top->sym_filter_entry == NULL || 193 top->sym_filter_entry->ms.sym != sym))) 194 return; 195 196 notes = symbol__annotation(sym); 197 198 if (pthread_mutex_trylock(¬es->lock)) 199 return; 200 201 err = hist_entry__inc_addr_samples(he, sample, evsel, ip); 202 203 pthread_mutex_unlock(¬es->lock); 204 205 if (unlikely(err)) { 206 /* 207 * This function is now called with he->hists->lock held. 208 * Release it before going to sleep. 209 */ 210 pthread_mutex_unlock(&he->hists->lock); 211 212 if (err == -ERANGE && !he->ms.map->erange_warned) 213 ui__warn_map_erange(he->ms.map, sym, ip); 214 else if (err == -ENOMEM) { 215 pr_err("Not enough memory for annotating '%s' symbol!\n", 216 sym->name); 217 sleep(1); 218 } 219 220 pthread_mutex_lock(&he->hists->lock); 221 } 222 } 223 224 static void perf_top__show_details(struct perf_top *top) 225 { 226 struct hist_entry *he = top->sym_filter_entry; 227 struct perf_evsel *evsel = hists_to_evsel(he->hists); 228 struct annotation *notes; 229 struct symbol *symbol; 230 int more; 231 232 if (!he) 233 return; 234 235 symbol = he->ms.sym; 236 notes = symbol__annotation(symbol); 237 238 pthread_mutex_lock(¬es->lock); 239 240 symbol__calc_percent(symbol, evsel); 241 242 if (notes->src == NULL) 243 goto out_unlock; 244 245 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name); 246 printf(" Events Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt); 247 248 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel, &top->annotation_opts); 249 250 if (top->evlist->enabled) { 251 if (top->zero) 252 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx); 253 else 254 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx); 255 } 256 if (more != 0) 257 printf("%d lines not displayed, maybe increase display entries [e]\n", more); 258 out_unlock: 259 pthread_mutex_unlock(¬es->lock); 260 } 261 262 static void perf_top__print_sym_table(struct perf_top *top) 263 { 264 char bf[160]; 265 int printed = 0; 266 const int win_width = top->winsize.ws_col - 1; 267 struct perf_evsel *evsel = top->sym_evsel; 268 struct hists *hists = evsel__hists(evsel); 269 270 puts(CONSOLE_CLEAR); 271 272 perf_top__header_snprintf(top, bf, sizeof(bf)); 273 printf("%s\n", bf); 274 275 perf_top__reset_sample_counters(top); 276 277 printf("%-*.*s\n", win_width, win_width, graph_dotted_line); 278 279 if (!top->record_opts.overwrite && 280 (hists->stats.nr_lost_warned != 281 hists->stats.nr_events[PERF_RECORD_LOST])) { 282 hists->stats.nr_lost_warned = 283 hists->stats.nr_events[PERF_RECORD_LOST]; 284 color_fprintf(stdout, PERF_COLOR_RED, 285 "WARNING: LOST %d chunks, Check IO/CPU overload", 286 hists->stats.nr_lost_warned); 287 ++printed; 288 } 289 290 if (top->sym_filter_entry) { 291 perf_top__show_details(top); 292 return; 293 } 294 295 if (top->evlist->enabled) { 296 if (top->zero) { 297 hists__delete_entries(hists); 298 } else { 299 hists__decay_entries(hists, top->hide_user_symbols, 300 top->hide_kernel_symbols); 301 } 302 } 303 304 hists__collapse_resort(hists, NULL); 305 perf_evsel__output_resort(evsel, NULL); 306 307 hists__output_recalc_col_len(hists, top->print_entries - printed); 308 putchar('\n'); 309 hists__fprintf(hists, false, top->print_entries - printed, win_width, 310 top->min_percent, stdout, !symbol_conf.use_callchain); 311 } 312 313 static void prompt_integer(int *target, const char *msg) 314 { 315 char *buf = malloc(0), *p; 316 size_t dummy = 0; 317 int tmp; 318 319 fprintf(stdout, "\n%s: ", msg); 320 if (getline(&buf, &dummy, stdin) < 0) 321 return; 322 323 p = strchr(buf, '\n'); 324 if (p) 325 *p = 0; 326 327 p = buf; 328 while(*p) { 329 if (!isdigit(*p)) 330 goto out_free; 331 p++; 332 } 333 tmp = strtoul(buf, NULL, 10); 334 *target = tmp; 335 out_free: 336 free(buf); 337 } 338 339 static void prompt_percent(int *target, const char *msg) 340 { 341 int tmp = 0; 342 343 prompt_integer(&tmp, msg); 344 if (tmp >= 0 && tmp <= 100) 345 *target = tmp; 346 } 347 348 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg) 349 { 350 char *buf = malloc(0), *p; 351 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL; 352 struct hists *hists = evsel__hists(top->sym_evsel); 353 struct rb_node *next; 354 size_t dummy = 0; 355 356 /* zero counters of active symbol */ 357 if (syme) { 358 __zero_source_counters(syme); 359 top->sym_filter_entry = NULL; 360 } 361 362 fprintf(stdout, "\n%s: ", msg); 363 if (getline(&buf, &dummy, stdin) < 0) 364 goto out_free; 365 366 p = strchr(buf, '\n'); 367 if (p) 368 *p = 0; 369 370 next = rb_first(&hists->entries); 371 while (next) { 372 n = rb_entry(next, struct hist_entry, rb_node); 373 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) { 374 found = n; 375 break; 376 } 377 next = rb_next(&n->rb_node); 378 } 379 380 if (!found) { 381 fprintf(stderr, "Sorry, %s is not active.\n", buf); 382 sleep(1); 383 } else 384 perf_top__parse_source(top, found); 385 386 out_free: 387 free(buf); 388 } 389 390 static void perf_top__print_mapped_keys(struct perf_top *top) 391 { 392 char *name = NULL; 393 394 if (top->sym_filter_entry) { 395 struct symbol *sym = top->sym_filter_entry->ms.sym; 396 name = sym->name; 397 } 398 399 fprintf(stdout, "\nMapped keys:\n"); 400 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs); 401 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries); 402 403 if (top->evlist->nr_entries > 1) 404 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel)); 405 406 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter); 407 408 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt); 409 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 410 fprintf(stdout, "\t[S] stop annotation.\n"); 411 412 fprintf(stdout, 413 "\t[K] hide kernel symbols. \t(%s)\n", 414 top->hide_kernel_symbols ? "yes" : "no"); 415 fprintf(stdout, 416 "\t[U] hide user symbols. \t(%s)\n", 417 top->hide_user_symbols ? "yes" : "no"); 418 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0); 419 fprintf(stdout, "\t[qQ] quit.\n"); 420 } 421 422 static int perf_top__key_mapped(struct perf_top *top, int c) 423 { 424 switch (c) { 425 case 'd': 426 case 'e': 427 case 'f': 428 case 'z': 429 case 'q': 430 case 'Q': 431 case 'K': 432 case 'U': 433 case 'F': 434 case 's': 435 case 'S': 436 return 1; 437 case 'E': 438 return top->evlist->nr_entries > 1 ? 1 : 0; 439 default: 440 break; 441 } 442 443 return 0; 444 } 445 446 static bool perf_top__handle_keypress(struct perf_top *top, int c) 447 { 448 bool ret = true; 449 450 if (!perf_top__key_mapped(top, c)) { 451 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 452 struct termios save; 453 454 perf_top__print_mapped_keys(top); 455 fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 456 fflush(stdout); 457 458 set_term_quiet_input(&save); 459 460 poll(&stdin_poll, 1, -1); 461 c = getc(stdin); 462 463 tcsetattr(0, TCSAFLUSH, &save); 464 if (!perf_top__key_mapped(top, c)) 465 return ret; 466 } 467 468 switch (c) { 469 case 'd': 470 prompt_integer(&top->delay_secs, "Enter display delay"); 471 if (top->delay_secs < 1) 472 top->delay_secs = 1; 473 break; 474 case 'e': 475 prompt_integer(&top->print_entries, "Enter display entries (lines)"); 476 if (top->print_entries == 0) { 477 perf_top__resize(top); 478 signal(SIGWINCH, winch_sig); 479 } else { 480 signal(SIGWINCH, SIG_DFL); 481 } 482 break; 483 case 'E': 484 if (top->evlist->nr_entries > 1) { 485 /* Select 0 as the default event: */ 486 int counter = 0; 487 488 fprintf(stderr, "\nAvailable events:"); 489 490 evlist__for_each_entry(top->evlist, top->sym_evsel) 491 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel)); 492 493 prompt_integer(&counter, "Enter details event counter"); 494 495 if (counter >= top->evlist->nr_entries) { 496 top->sym_evsel = perf_evlist__first(top->evlist); 497 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel)); 498 sleep(1); 499 break; 500 } 501 evlist__for_each_entry(top->evlist, top->sym_evsel) 502 if (top->sym_evsel->idx == counter) 503 break; 504 } else 505 top->sym_evsel = perf_evlist__first(top->evlist); 506 break; 507 case 'f': 508 prompt_integer(&top->count_filter, "Enter display event count filter"); 509 break; 510 case 'F': 511 prompt_percent(&top->annotation_opts.min_pcnt, 512 "Enter details display event filter (percent)"); 513 break; 514 case 'K': 515 top->hide_kernel_symbols = !top->hide_kernel_symbols; 516 break; 517 case 'q': 518 case 'Q': 519 printf("exiting.\n"); 520 if (top->dump_symtab) 521 perf_session__fprintf_dsos(top->session, stderr); 522 ret = false; 523 break; 524 case 's': 525 perf_top__prompt_symbol(top, "Enter details symbol"); 526 break; 527 case 'S': 528 if (!top->sym_filter_entry) 529 break; 530 else { 531 struct hist_entry *syme = top->sym_filter_entry; 532 533 top->sym_filter_entry = NULL; 534 __zero_source_counters(syme); 535 } 536 break; 537 case 'U': 538 top->hide_user_symbols = !top->hide_user_symbols; 539 break; 540 case 'z': 541 top->zero = !top->zero; 542 break; 543 default: 544 break; 545 } 546 547 return ret; 548 } 549 550 static void perf_top__sort_new_samples(void *arg) 551 { 552 struct perf_top *t = arg; 553 struct perf_evsel *evsel = t->sym_evsel; 554 struct hists *hists; 555 556 perf_top__reset_sample_counters(t); 557 558 if (t->evlist->selected != NULL) 559 t->sym_evsel = t->evlist->selected; 560 561 hists = evsel__hists(evsel); 562 563 if (t->evlist->enabled) { 564 if (t->zero) { 565 hists__delete_entries(hists); 566 } else { 567 hists__decay_entries(hists, t->hide_user_symbols, 568 t->hide_kernel_symbols); 569 } 570 } 571 572 hists__collapse_resort(hists, NULL); 573 perf_evsel__output_resort(evsel, NULL); 574 } 575 576 static void *display_thread_tui(void *arg) 577 { 578 struct perf_evsel *pos; 579 struct perf_top *top = arg; 580 const char *help = "For a higher level overview, try: perf top --sort comm,dso"; 581 struct hist_browser_timer hbt = { 582 .timer = perf_top__sort_new_samples, 583 .arg = top, 584 .refresh = top->delay_secs, 585 }; 586 587 /* In order to read symbols from other namespaces perf to needs to call 588 * setns(2). This isn't permitted if the struct_fs has multiple users. 589 * unshare(2) the fs so that we may continue to setns into namespaces 590 * that we're observing. 591 */ 592 unshare(CLONE_FS); 593 594 perf_top__sort_new_samples(top); 595 596 /* 597 * Initialize the uid_filter_str, in the future the TUI will allow 598 * Zooming in/out UIDs. For now juse use whatever the user passed 599 * via --uid. 600 */ 601 evlist__for_each_entry(top->evlist, pos) { 602 struct hists *hists = evsel__hists(pos); 603 hists->uid_filter_str = top->record_opts.target.uid_str; 604 } 605 606 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, 607 top->min_percent, 608 &top->session->header.env, 609 !top->record_opts.overwrite, 610 &top->annotation_opts); 611 612 done = 1; 613 return NULL; 614 } 615 616 static void display_sig(int sig __maybe_unused) 617 { 618 done = 1; 619 } 620 621 static void display_setup_sig(void) 622 { 623 signal(SIGSEGV, sighandler_dump_stack); 624 signal(SIGFPE, sighandler_dump_stack); 625 signal(SIGINT, display_sig); 626 signal(SIGQUIT, display_sig); 627 signal(SIGTERM, display_sig); 628 } 629 630 static void *display_thread(void *arg) 631 { 632 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 633 struct termios save; 634 struct perf_top *top = arg; 635 int delay_msecs, c; 636 637 /* In order to read symbols from other namespaces perf to needs to call 638 * setns(2). This isn't permitted if the struct_fs has multiple users. 639 * unshare(2) the fs so that we may continue to setns into namespaces 640 * that we're observing. 641 */ 642 unshare(CLONE_FS); 643 644 display_setup_sig(); 645 pthread__unblock_sigwinch(); 646 repeat: 647 delay_msecs = top->delay_secs * MSEC_PER_SEC; 648 set_term_quiet_input(&save); 649 /* trash return*/ 650 getc(stdin); 651 652 while (!done) { 653 perf_top__print_sym_table(top); 654 /* 655 * Either timeout expired or we got an EINTR due to SIGWINCH, 656 * refresh screen in both cases. 657 */ 658 switch (poll(&stdin_poll, 1, delay_msecs)) { 659 case 0: 660 continue; 661 case -1: 662 if (errno == EINTR) 663 continue; 664 __fallthrough; 665 default: 666 c = getc(stdin); 667 tcsetattr(0, TCSAFLUSH, &save); 668 669 if (perf_top__handle_keypress(top, c)) 670 goto repeat; 671 done = 1; 672 } 673 } 674 675 tcsetattr(0, TCSAFLUSH, &save); 676 return NULL; 677 } 678 679 static int hist_iter__top_callback(struct hist_entry_iter *iter, 680 struct addr_location *al, bool single, 681 void *arg) 682 { 683 struct perf_top *top = arg; 684 struct hist_entry *he = iter->he; 685 struct perf_evsel *evsel = iter->evsel; 686 687 if (perf_hpp_list.sym && single) 688 perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr); 689 690 hist__account_cycles(iter->sample->branch_stack, al, iter->sample, 691 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY)); 692 return 0; 693 } 694 695 static void perf_event__process_sample(struct perf_tool *tool, 696 const union perf_event *event, 697 struct perf_evsel *evsel, 698 struct perf_sample *sample, 699 struct machine *machine) 700 { 701 struct perf_top *top = container_of(tool, struct perf_top, tool); 702 struct addr_location al; 703 int err; 704 705 if (!machine && perf_guest) { 706 static struct intlist *seen; 707 708 if (!seen) 709 seen = intlist__new(NULL); 710 711 if (!intlist__has_entry(seen, sample->pid)) { 712 pr_err("Can't find guest [%d]'s kernel information\n", 713 sample->pid); 714 intlist__add(seen, sample->pid); 715 } 716 return; 717 } 718 719 if (!machine) { 720 pr_err("%u unprocessable samples recorded.\r", 721 top->session->evlist->stats.nr_unprocessable_samples++); 722 return; 723 } 724 725 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) 726 top->exact_samples++; 727 728 if (machine__resolve(machine, &al, sample) < 0) 729 return; 730 731 if (!machine->kptr_restrict_warned && 732 symbol_conf.kptr_restrict && 733 al.cpumode == PERF_RECORD_MISC_KERNEL) { 734 if (!perf_evlist__exclude_kernel(top->session->evlist)) { 735 ui__warning( 736 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 737 "Check /proc/sys/kernel/kptr_restrict.\n\n" 738 "Kernel%s samples will not be resolved.\n", 739 al.map && map__has_symbols(al.map) ? 740 " modules" : ""); 741 if (use_browser <= 0) 742 sleep(5); 743 } 744 machine->kptr_restrict_warned = true; 745 } 746 747 if (al.sym == NULL && al.map != NULL) { 748 const char *msg = "Kernel samples will not be resolved.\n"; 749 /* 750 * As we do lazy loading of symtabs we only will know if the 751 * specified vmlinux file is invalid when we actually have a 752 * hit in kernel space and then try to load it. So if we get 753 * here and there are _no_ symbols in the DSO backing the 754 * kernel map, bail out. 755 * 756 * We may never get here, for instance, if we use -K/ 757 * --hide-kernel-symbols, even if the user specifies an 758 * invalid --vmlinux ;-) 759 */ 760 if (!machine->kptr_restrict_warned && !top->vmlinux_warned && 761 __map__is_kernel(al.map) && map__has_symbols(al.map)) { 762 if (symbol_conf.vmlinux_name) { 763 char serr[256]; 764 dso__strerror_load(al.map->dso, serr, sizeof(serr)); 765 ui__warning("The %s file can't be used: %s\n%s", 766 symbol_conf.vmlinux_name, serr, msg); 767 } else { 768 ui__warning("A vmlinux file was not found.\n%s", 769 msg); 770 } 771 772 if (use_browser <= 0) 773 sleep(5); 774 top->vmlinux_warned = true; 775 } 776 } 777 778 if (al.sym == NULL || !al.sym->idle) { 779 struct hists *hists = evsel__hists(evsel); 780 struct hist_entry_iter iter = { 781 .evsel = evsel, 782 .sample = sample, 783 .add_entry_cb = hist_iter__top_callback, 784 }; 785 786 if (symbol_conf.cumulate_callchain) 787 iter.ops = &hist_iter_cumulative; 788 else 789 iter.ops = &hist_iter_normal; 790 791 pthread_mutex_lock(&hists->lock); 792 793 err = hist_entry_iter__add(&iter, &al, top->max_stack, top); 794 if (err < 0) 795 pr_err("Problem incrementing symbol period, skipping event\n"); 796 797 pthread_mutex_unlock(&hists->lock); 798 } 799 800 addr_location__put(&al); 801 } 802 803 static void perf_top__mmap_read_idx(struct perf_top *top, int idx) 804 { 805 struct record_opts *opts = &top->record_opts; 806 struct perf_evlist *evlist = top->evlist; 807 struct perf_sample sample; 808 struct perf_evsel *evsel; 809 struct perf_mmap *md; 810 struct perf_session *session = top->session; 811 union perf_event *event; 812 struct machine *machine; 813 int ret; 814 815 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx]; 816 if (perf_mmap__read_init(md) < 0) 817 return; 818 819 while ((event = perf_mmap__read_event(md)) != NULL) { 820 ret = perf_evlist__parse_sample(evlist, event, &sample); 821 if (ret) { 822 pr_err("Can't parse sample, err = %d\n", ret); 823 goto next_event; 824 } 825 826 evsel = perf_evlist__id2evsel(session->evlist, sample.id); 827 assert(evsel != NULL); 828 829 if (event->header.type == PERF_RECORD_SAMPLE) 830 ++top->samples; 831 832 switch (sample.cpumode) { 833 case PERF_RECORD_MISC_USER: 834 ++top->us_samples; 835 if (top->hide_user_symbols) 836 goto next_event; 837 machine = &session->machines.host; 838 break; 839 case PERF_RECORD_MISC_KERNEL: 840 ++top->kernel_samples; 841 if (top->hide_kernel_symbols) 842 goto next_event; 843 machine = &session->machines.host; 844 break; 845 case PERF_RECORD_MISC_GUEST_KERNEL: 846 ++top->guest_kernel_samples; 847 machine = perf_session__find_machine(session, 848 sample.pid); 849 break; 850 case PERF_RECORD_MISC_GUEST_USER: 851 ++top->guest_us_samples; 852 /* 853 * TODO: we don't process guest user from host side 854 * except simple counting. 855 */ 856 goto next_event; 857 default: 858 if (event->header.type == PERF_RECORD_SAMPLE) 859 goto next_event; 860 machine = &session->machines.host; 861 break; 862 } 863 864 865 if (event->header.type == PERF_RECORD_SAMPLE) { 866 perf_event__process_sample(&top->tool, event, evsel, 867 &sample, machine); 868 } else if (event->header.type < PERF_RECORD_MAX) { 869 hists__inc_nr_events(evsel__hists(evsel), event->header.type); 870 machine__process_event(machine, event, &sample); 871 } else 872 ++session->evlist->stats.nr_unknown_events; 873 next_event: 874 perf_mmap__consume(md); 875 } 876 877 perf_mmap__read_done(md); 878 } 879 880 static void perf_top__mmap_read(struct perf_top *top) 881 { 882 bool overwrite = top->record_opts.overwrite; 883 struct perf_evlist *evlist = top->evlist; 884 unsigned long long start, end; 885 int i; 886 887 start = rdclock(); 888 if (overwrite) 889 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING); 890 891 for (i = 0; i < top->evlist->nr_mmaps; i++) 892 perf_top__mmap_read_idx(top, i); 893 894 if (overwrite) { 895 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); 896 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING); 897 } 898 end = rdclock(); 899 900 if ((end - start) > (unsigned long long)top->delay_secs * NSEC_PER_SEC) 901 ui__warning("Too slow to read ring buffer.\n" 902 "Please try increasing the period (-c) or\n" 903 "decreasing the freq (-F) or\n" 904 "limiting the number of CPUs (-C)\n"); 905 } 906 907 /* 908 * Check per-event overwrite term. 909 * perf top should support consistent term for all events. 910 * - All events don't have per-event term 911 * E.g. "cpu/cpu-cycles/,cpu/instructions/" 912 * Nothing change, return 0. 913 * - All events have same per-event term 914 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/ 915 * Using the per-event setting to replace the opts->overwrite if 916 * they are different, then return 0. 917 * - Events have different per-event term 918 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/" 919 * Return -1 920 * - Some of the event set per-event term, but some not. 921 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/" 922 * Return -1 923 */ 924 static int perf_top__overwrite_check(struct perf_top *top) 925 { 926 struct record_opts *opts = &top->record_opts; 927 struct perf_evlist *evlist = top->evlist; 928 struct perf_evsel_config_term *term; 929 struct list_head *config_terms; 930 struct perf_evsel *evsel; 931 int set, overwrite = -1; 932 933 evlist__for_each_entry(evlist, evsel) { 934 set = -1; 935 config_terms = &evsel->config_terms; 936 list_for_each_entry(term, config_terms, list) { 937 if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE) 938 set = term->val.overwrite ? 1 : 0; 939 } 940 941 /* no term for current and previous event (likely) */ 942 if ((overwrite < 0) && (set < 0)) 943 continue; 944 945 /* has term for both current and previous event, compare */ 946 if ((overwrite >= 0) && (set >= 0) && (overwrite != set)) 947 return -1; 948 949 /* no term for current event but has term for previous one */ 950 if ((overwrite >= 0) && (set < 0)) 951 return -1; 952 953 /* has term for current event */ 954 if ((overwrite < 0) && (set >= 0)) { 955 /* if it's first event, set overwrite */ 956 if (evsel == perf_evlist__first(evlist)) 957 overwrite = set; 958 else 959 return -1; 960 } 961 } 962 963 if ((overwrite >= 0) && (opts->overwrite != overwrite)) 964 opts->overwrite = overwrite; 965 966 return 0; 967 } 968 969 static int perf_top_overwrite_fallback(struct perf_top *top, 970 struct perf_evsel *evsel) 971 { 972 struct record_opts *opts = &top->record_opts; 973 struct perf_evlist *evlist = top->evlist; 974 struct perf_evsel *counter; 975 976 if (!opts->overwrite) 977 return 0; 978 979 /* only fall back when first event fails */ 980 if (evsel != perf_evlist__first(evlist)) 981 return 0; 982 983 evlist__for_each_entry(evlist, counter) 984 counter->attr.write_backward = false; 985 opts->overwrite = false; 986 pr_debug2("fall back to non-overwrite mode\n"); 987 return 1; 988 } 989 990 static int perf_top__start_counters(struct perf_top *top) 991 { 992 char msg[BUFSIZ]; 993 struct perf_evsel *counter; 994 struct perf_evlist *evlist = top->evlist; 995 struct record_opts *opts = &top->record_opts; 996 997 if (perf_top__overwrite_check(top)) { 998 ui__error("perf top only support consistent per-event " 999 "overwrite setting for all events\n"); 1000 goto out_err; 1001 } 1002 1003 perf_evlist__config(evlist, opts, &callchain_param); 1004 1005 evlist__for_each_entry(evlist, counter) { 1006 try_again: 1007 if (perf_evsel__open(counter, top->evlist->cpus, 1008 top->evlist->threads) < 0) { 1009 1010 /* 1011 * Specially handle overwrite fall back. 1012 * Because perf top is the only tool which has 1013 * overwrite mode by default, support 1014 * both overwrite and non-overwrite mode, and 1015 * require consistent mode for all events. 1016 * 1017 * May move it to generic code with more tools 1018 * have similar attribute. 1019 */ 1020 if (perf_missing_features.write_backward && 1021 perf_top_overwrite_fallback(top, counter)) 1022 goto try_again; 1023 1024 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 1025 if (verbose > 0) 1026 ui__warning("%s\n", msg); 1027 goto try_again; 1028 } 1029 1030 perf_evsel__open_strerror(counter, &opts->target, 1031 errno, msg, sizeof(msg)); 1032 ui__error("%s\n", msg); 1033 goto out_err; 1034 } 1035 } 1036 1037 if (perf_evlist__mmap(evlist, opts->mmap_pages) < 0) { 1038 ui__error("Failed to mmap with %d (%s)\n", 1039 errno, str_error_r(errno, msg, sizeof(msg))); 1040 goto out_err; 1041 } 1042 1043 return 0; 1044 1045 out_err: 1046 return -1; 1047 } 1048 1049 static int callchain_param__setup_sample_type(struct callchain_param *callchain) 1050 { 1051 if (!perf_hpp_list.sym) { 1052 if (callchain->enabled) { 1053 ui__error("Selected -g but \"sym\" not present in --sort/-s."); 1054 return -EINVAL; 1055 } 1056 } else if (callchain->mode != CHAIN_NONE) { 1057 if (callchain_register_param(callchain) < 0) { 1058 ui__error("Can't register callchain params.\n"); 1059 return -EINVAL; 1060 } 1061 } 1062 1063 return 0; 1064 } 1065 1066 static int __cmd_top(struct perf_top *top) 1067 { 1068 char msg[512]; 1069 struct perf_evsel *pos; 1070 struct perf_evsel_config_term *err_term; 1071 struct perf_evlist *evlist = top->evlist; 1072 struct record_opts *opts = &top->record_opts; 1073 pthread_t thread; 1074 int ret; 1075 1076 top->session = perf_session__new(NULL, false, NULL); 1077 if (top->session == NULL) 1078 return -1; 1079 1080 if (!top->annotation_opts.objdump_path) { 1081 ret = perf_env__lookup_objdump(&top->session->header.env, 1082 &top->annotation_opts.objdump_path); 1083 if (ret) 1084 goto out_delete; 1085 } 1086 1087 ret = callchain_param__setup_sample_type(&callchain_param); 1088 if (ret) 1089 goto out_delete; 1090 1091 if (perf_session__register_idle_thread(top->session) < 0) 1092 goto out_delete; 1093 1094 if (top->nr_threads_synthesize > 1) 1095 perf_set_multithreaded(); 1096 1097 machine__synthesize_threads(&top->session->machines.host, &opts->target, 1098 top->evlist->threads, false, 1099 opts->proc_map_timeout, 1100 top->nr_threads_synthesize); 1101 1102 if (top->nr_threads_synthesize > 1) 1103 perf_set_singlethreaded(); 1104 1105 if (perf_hpp_list.socket) { 1106 ret = perf_env__read_cpu_topology_map(&perf_env); 1107 if (ret < 0) 1108 goto out_err_cpu_topo; 1109 } 1110 1111 ret = perf_top__start_counters(top); 1112 if (ret) 1113 goto out_delete; 1114 1115 ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term); 1116 if (ret) { 1117 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n", 1118 err_term->val.drv_cfg, perf_evsel__name(pos), errno, 1119 str_error_r(errno, msg, sizeof(msg))); 1120 goto out_delete; 1121 } 1122 1123 top->session->evlist = top->evlist; 1124 perf_session__set_id_hdr_size(top->session); 1125 1126 /* 1127 * When perf is starting the traced process, all the events (apart from 1128 * group members) have enable_on_exec=1 set, so don't spoil it by 1129 * prematurely enabling them. 1130 * 1131 * XXX 'top' still doesn't start workloads like record, trace, but should, 1132 * so leave the check here. 1133 */ 1134 if (!target__none(&opts->target)) 1135 perf_evlist__enable(top->evlist); 1136 1137 ret = -1; 1138 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : 1139 display_thread), top)) { 1140 ui__error("Could not create display thread.\n"); 1141 goto out_delete; 1142 } 1143 1144 if (top->realtime_prio) { 1145 struct sched_param param; 1146 1147 param.sched_priority = top->realtime_prio; 1148 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 1149 ui__error("Could not set realtime priority.\n"); 1150 goto out_join; 1151 } 1152 } 1153 1154 /* Wait for a minimal set of events before starting the snapshot */ 1155 perf_evlist__poll(top->evlist, 100); 1156 1157 perf_top__mmap_read(top); 1158 1159 while (!done) { 1160 u64 hits = top->samples; 1161 1162 perf_top__mmap_read(top); 1163 1164 if (opts->overwrite || (hits == top->samples)) 1165 ret = perf_evlist__poll(top->evlist, 100); 1166 1167 if (resize) { 1168 perf_top__resize(top); 1169 resize = 0; 1170 } 1171 } 1172 1173 ret = 0; 1174 out_join: 1175 pthread_join(thread, NULL); 1176 out_delete: 1177 perf_session__delete(top->session); 1178 top->session = NULL; 1179 1180 return ret; 1181 1182 out_err_cpu_topo: { 1183 char errbuf[BUFSIZ]; 1184 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf)); 1185 1186 ui__error("Could not read the CPU topology map: %s\n", err); 1187 goto out_delete; 1188 } 1189 } 1190 1191 static int 1192 callchain_opt(const struct option *opt, const char *arg, int unset) 1193 { 1194 symbol_conf.use_callchain = true; 1195 return record_callchain_opt(opt, arg, unset); 1196 } 1197 1198 static int 1199 parse_callchain_opt(const struct option *opt, const char *arg, int unset) 1200 { 1201 struct callchain_param *callchain = opt->value; 1202 1203 callchain->enabled = !unset; 1204 callchain->record_mode = CALLCHAIN_FP; 1205 1206 /* 1207 * --no-call-graph 1208 */ 1209 if (unset) { 1210 symbol_conf.use_callchain = false; 1211 callchain->record_mode = CALLCHAIN_NONE; 1212 return 0; 1213 } 1214 1215 return parse_callchain_top_opt(arg); 1216 } 1217 1218 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused) 1219 { 1220 if (!strcmp(var, "top.call-graph")) { 1221 var = "call-graph.record-mode"; 1222 return perf_default_config(var, value, cb); 1223 } 1224 if (!strcmp(var, "top.children")) { 1225 symbol_conf.cumulate_callchain = perf_config_bool(var, value); 1226 return 0; 1227 } 1228 1229 return 0; 1230 } 1231 1232 static int 1233 parse_percent_limit(const struct option *opt, const char *arg, 1234 int unset __maybe_unused) 1235 { 1236 struct perf_top *top = opt->value; 1237 1238 top->min_percent = strtof(arg, NULL); 1239 return 0; 1240 } 1241 1242 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP 1243 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function"; 1244 1245 int cmd_top(int argc, const char **argv) 1246 { 1247 char errbuf[BUFSIZ]; 1248 struct perf_top top = { 1249 .count_filter = 5, 1250 .delay_secs = 2, 1251 .record_opts = { 1252 .mmap_pages = UINT_MAX, 1253 .user_freq = UINT_MAX, 1254 .user_interval = ULLONG_MAX, 1255 .freq = 4000, /* 4 KHz */ 1256 .target = { 1257 .uses_mmap = true, 1258 }, 1259 .proc_map_timeout = 500, 1260 /* 1261 * FIXME: This will lose PERF_RECORD_MMAP and other metadata 1262 * when we pause, fix that and reenable. Probably using a 1263 * separate evlist with a dummy event, i.e. a non-overwrite 1264 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE 1265 * stays in overwrite mode. -acme 1266 * */ 1267 .overwrite = 0, 1268 }, 1269 .max_stack = sysctl__max_stack(), 1270 .annotation_opts = annotation__default_options, 1271 .nr_threads_synthesize = UINT_MAX, 1272 }; 1273 struct record_opts *opts = &top.record_opts; 1274 struct target *target = &opts->target; 1275 const struct option options[] = { 1276 OPT_CALLBACK('e', "event", &top.evlist, "event", 1277 "event selector. use 'perf list' to list available events", 1278 parse_events_option), 1279 OPT_U64('c', "count", &opts->user_interval, "event period to sample"), 1280 OPT_STRING('p', "pid", &target->pid, "pid", 1281 "profile events on existing process id"), 1282 OPT_STRING('t', "tid", &target->tid, "tid", 1283 "profile events on existing thread id"), 1284 OPT_BOOLEAN('a', "all-cpus", &target->system_wide, 1285 "system-wide collection from all CPUs"), 1286 OPT_STRING('C', "cpu", &target->cpu_list, "cpu", 1287 "list of cpus to monitor"), 1288 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 1289 "file", "vmlinux pathname"), 1290 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux, 1291 "don't load vmlinux even if found"), 1292 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, 1293 "hide kernel symbols"), 1294 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages", 1295 "number of mmap data pages", 1296 perf_evlist__parse_mmap_pages), 1297 OPT_INTEGER('r', "realtime", &top.realtime_prio, 1298 "collect data with this RT SCHED_FIFO priority"), 1299 OPT_INTEGER('d', "delay", &top.delay_secs, 1300 "number of seconds to delay between refreshes"), 1301 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab, 1302 "dump the symbol table used for profiling"), 1303 OPT_INTEGER('f', "count-filter", &top.count_filter, 1304 "only display functions with more events than this"), 1305 OPT_BOOLEAN(0, "group", &opts->group, 1306 "put the counters into a counter group"), 1307 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit, 1308 "child tasks do not inherit counters"), 1309 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name", 1310 "symbol to annotate"), 1311 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"), 1312 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'", 1313 "profile at this frequency", 1314 record__parse_freq), 1315 OPT_INTEGER('E', "entries", &top.print_entries, 1316 "display this many functions"), 1317 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, 1318 "hide user symbols"), 1319 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"), 1320 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"), 1321 OPT_INCR('v', "verbose", &verbose, 1322 "be more verbose (show counter open errors, etc)"), 1323 OPT_STRING('s', "sort", &sort_order, "key[,key2...]", 1324 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..." 1325 " Please refer the man page for the complete list."), 1326 OPT_STRING(0, "fields", &field_order, "key[,keys...]", 1327 "output field(s): overhead, period, sample plus all of sort keys"), 1328 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, 1329 "Show a column with the number of samples"), 1330 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, 1331 NULL, "enables call-graph recording and display", 1332 &callchain_opt), 1333 OPT_CALLBACK(0, "call-graph", &callchain_param, 1334 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]", 1335 top_callchain_help, &parse_callchain_opt), 1336 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain, 1337 "Accumulate callchains of children and show total overhead as well"), 1338 OPT_INTEGER(0, "max-stack", &top.max_stack, 1339 "Set the maximum stack depth when parsing the callchain. " 1340 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)), 1341 OPT_CALLBACK(0, "ignore-callees", NULL, "regex", 1342 "ignore callees of these functions in call graphs", 1343 report_parse_ignore_callees_opt), 1344 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, 1345 "Show a column with the sum of periods"), 1346 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", 1347 "only consider symbols in these dsos"), 1348 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]", 1349 "only consider symbols in these comms"), 1350 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", 1351 "only consider these symbols"), 1352 OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src, 1353 "Interleave source code with assembly code (default)"), 1354 OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw, 1355 "Display raw encoding of assembly instructions (default)"), 1356 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel, 1357 "Enable kernel symbol demangling"), 1358 OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path", 1359 "objdump binary to use for disassembly and annotations"), 1360 OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style", 1361 "Specify disassembler style (e.g. -M intel for intel syntax)"), 1362 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"), 1363 OPT_CALLBACK(0, "percent-limit", &top, "percent", 1364 "Don't show entries under that percent", parse_percent_limit), 1365 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute", 1366 "How to display percentage of filtered entries", parse_filter_percentage), 1367 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str, 1368 "width[,width...]", 1369 "don't try to adjust column width, use these fixed values"), 1370 OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout, 1371 "per thread proc mmap processing timeout in ms"), 1372 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack, 1373 "branch any", "sample any taken branches", 1374 parse_branch_stack), 1375 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack, 1376 "branch filter mask", "branch stack filter modes", 1377 parse_branch_stack), 1378 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace, 1379 "Show raw trace event output (do not use print fmt or plugins)"), 1380 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy, 1381 "Show entries in a hierarchy"), 1382 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite, 1383 "Use a backward ring buffer, default: no"), 1384 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"), 1385 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize, 1386 "number of thread to run event synthesize"), 1387 OPT_END() 1388 }; 1389 const char * const top_usage[] = { 1390 "perf top [<options>]", 1391 NULL 1392 }; 1393 int status = hists__init(); 1394 1395 if (status < 0) 1396 return status; 1397 1398 top.annotation_opts.min_pcnt = 5; 1399 top.annotation_opts.context = 4; 1400 1401 top.evlist = perf_evlist__new(); 1402 if (top.evlist == NULL) 1403 return -ENOMEM; 1404 1405 status = perf_config(perf_top_config, &top); 1406 if (status) 1407 return status; 1408 1409 argc = parse_options(argc, argv, options, top_usage, 0); 1410 if (argc) 1411 usage_with_options(top_usage, options); 1412 1413 if (!top.evlist->nr_entries && 1414 perf_evlist__add_default(top.evlist) < 0) { 1415 pr_err("Not enough memory for event selector list\n"); 1416 goto out_delete_evlist; 1417 } 1418 1419 if (symbol_conf.report_hierarchy) { 1420 /* disable incompatible options */ 1421 symbol_conf.event_group = false; 1422 symbol_conf.cumulate_callchain = false; 1423 1424 if (field_order) { 1425 pr_err("Error: --hierarchy and --fields options cannot be used together\n"); 1426 parse_options_usage(top_usage, options, "fields", 0); 1427 parse_options_usage(NULL, options, "hierarchy", 0); 1428 goto out_delete_evlist; 1429 } 1430 } 1431 1432 sort__mode = SORT_MODE__TOP; 1433 /* display thread wants entries to be collapsed in a different tree */ 1434 perf_hpp_list.need_collapse = 1; 1435 1436 if (top.use_stdio) 1437 use_browser = 0; 1438 else if (top.use_tui) 1439 use_browser = 1; 1440 1441 setup_browser(false); 1442 1443 if (setup_sorting(top.evlist) < 0) { 1444 if (sort_order) 1445 parse_options_usage(top_usage, options, "s", 1); 1446 if (field_order) 1447 parse_options_usage(sort_order ? NULL : top_usage, 1448 options, "fields", 0); 1449 goto out_delete_evlist; 1450 } 1451 1452 status = target__validate(target); 1453 if (status) { 1454 target__strerror(target, status, errbuf, BUFSIZ); 1455 ui__warning("%s\n", errbuf); 1456 } 1457 1458 status = target__parse_uid(target); 1459 if (status) { 1460 int saved_errno = errno; 1461 1462 target__strerror(target, status, errbuf, BUFSIZ); 1463 ui__error("%s\n", errbuf); 1464 1465 status = -saved_errno; 1466 goto out_delete_evlist; 1467 } 1468 1469 if (target__none(target)) 1470 target->system_wide = true; 1471 1472 if (perf_evlist__create_maps(top.evlist, target) < 0) { 1473 ui__error("Couldn't create thread/CPU maps: %s\n", 1474 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf))); 1475 goto out_delete_evlist; 1476 } 1477 1478 if (top.delay_secs < 1) 1479 top.delay_secs = 1; 1480 1481 if (record_opts__config(opts)) { 1482 status = -EINVAL; 1483 goto out_delete_evlist; 1484 } 1485 1486 top.sym_evsel = perf_evlist__first(top.evlist); 1487 1488 if (!callchain_param.enabled) { 1489 symbol_conf.cumulate_callchain = false; 1490 perf_hpp__cancel_cumulate(); 1491 } 1492 1493 if (symbol_conf.cumulate_callchain && !callchain_param.order_set) 1494 callchain_param.order = ORDER_CALLER; 1495 1496 status = symbol__annotation_init(); 1497 if (status < 0) 1498 goto out_delete_evlist; 1499 1500 annotation_config__init(); 1501 1502 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); 1503 if (symbol__init(NULL) < 0) 1504 return -1; 1505 1506 sort__setup_elide(stdout); 1507 1508 get_term_dimensions(&top.winsize); 1509 if (top.print_entries == 0) { 1510 perf_top__update_print_entries(&top); 1511 signal(SIGWINCH, winch_sig); 1512 } 1513 1514 status = __cmd_top(&top); 1515 1516 out_delete_evlist: 1517 perf_evlist__delete(top.evlist); 1518 1519 return status; 1520 } 1521