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/cache.h" 26 #include "util/color.h" 27 #include "util/evlist.h" 28 #include "util/evsel.h" 29 #include "util/machine.h" 30 #include "util/session.h" 31 #include "util/symbol.h" 32 #include "util/thread.h" 33 #include "util/thread_map.h" 34 #include "util/top.h" 35 #include "util/util.h" 36 #include <linux/rbtree.h> 37 #include "util/parse-options.h" 38 #include "util/parse-events.h" 39 #include "util/cpumap.h" 40 #include "util/xyarray.h" 41 #include "util/sort.h" 42 #include "util/intlist.h" 43 44 #include "util/debug.h" 45 46 #include <assert.h> 47 #include <elf.h> 48 #include <fcntl.h> 49 50 #include <stdio.h> 51 #include <termios.h> 52 #include <unistd.h> 53 #include <inttypes.h> 54 55 #include <errno.h> 56 #include <time.h> 57 #include <sched.h> 58 59 #include <sys/syscall.h> 60 #include <sys/ioctl.h> 61 #include <sys/poll.h> 62 #include <sys/prctl.h> 63 #include <sys/wait.h> 64 #include <sys/uio.h> 65 #include <sys/utsname.h> 66 #include <sys/mman.h> 67 68 #include <linux/unistd.h> 69 #include <linux/types.h> 70 71 static volatile int done; 72 73 static void perf_top__update_print_entries(struct perf_top *top) 74 { 75 if (top->print_entries > 9) 76 top->print_entries -= 9; 77 } 78 79 static void perf_top__sig_winch(int sig __maybe_unused, 80 siginfo_t *info __maybe_unused, void *arg) 81 { 82 struct perf_top *top = arg; 83 84 get_term_dimensions(&top->winsize); 85 if (!top->print_entries 86 || (top->print_entries+4) > top->winsize.ws_row) { 87 top->print_entries = top->winsize.ws_row; 88 } else { 89 top->print_entries += 4; 90 top->winsize.ws_row = top->print_entries; 91 } 92 perf_top__update_print_entries(top); 93 } 94 95 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he) 96 { 97 struct symbol *sym; 98 struct annotation *notes; 99 struct map *map; 100 int err = -1; 101 102 if (!he || !he->ms.sym) 103 return -1; 104 105 sym = he->ms.sym; 106 map = he->ms.map; 107 108 /* 109 * We can't annotate with just /proc/kallsyms 110 */ 111 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) { 112 pr_err("Can't annotate %s: No vmlinux file was found in the " 113 "path\n", sym->name); 114 sleep(1); 115 return -1; 116 } 117 118 notes = symbol__annotation(sym); 119 if (notes->src != NULL) { 120 pthread_mutex_lock(¬es->lock); 121 goto out_assign; 122 } 123 124 pthread_mutex_lock(¬es->lock); 125 126 if (symbol__alloc_hist(sym) < 0) { 127 pthread_mutex_unlock(¬es->lock); 128 pr_err("Not enough memory for annotating '%s' symbol!\n", 129 sym->name); 130 sleep(1); 131 return err; 132 } 133 134 err = symbol__annotate(sym, map, 0); 135 if (err == 0) { 136 out_assign: 137 top->sym_filter_entry = he; 138 } 139 140 pthread_mutex_unlock(¬es->lock); 141 return err; 142 } 143 144 static void __zero_source_counters(struct hist_entry *he) 145 { 146 struct symbol *sym = he->ms.sym; 147 symbol__annotate_zero_histograms(sym); 148 } 149 150 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip) 151 { 152 struct utsname uts; 153 int err = uname(&uts); 154 155 ui__warning("Out of bounds address found:\n\n" 156 "Addr: %" PRIx64 "\n" 157 "DSO: %s %c\n" 158 "Map: %" PRIx64 "-%" PRIx64 "\n" 159 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n" 160 "Arch: %s\n" 161 "Kernel: %s\n" 162 "Tools: %s\n\n" 163 "Not all samples will be on the annotation output.\n\n" 164 "Please report to linux-kernel@vger.kernel.org\n", 165 ip, map->dso->long_name, dso__symtab_origin(map->dso), 166 map->start, map->end, sym->start, sym->end, 167 sym->binding == STB_GLOBAL ? 'g' : 168 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name, 169 err ? "[unknown]" : uts.machine, 170 err ? "[unknown]" : uts.release, perf_version_string); 171 if (use_browser <= 0) 172 sleep(5); 173 174 map->erange_warned = true; 175 } 176 177 static void perf_top__record_precise_ip(struct perf_top *top, 178 struct hist_entry *he, 179 int counter, u64 ip) 180 { 181 struct annotation *notes; 182 struct symbol *sym; 183 int err; 184 185 if (he == NULL || he->ms.sym == NULL || 186 ((top->sym_filter_entry == NULL || 187 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1)) 188 return; 189 190 sym = he->ms.sym; 191 notes = symbol__annotation(sym); 192 193 if (pthread_mutex_trylock(¬es->lock)) 194 return; 195 196 if (notes->src == NULL && symbol__alloc_hist(sym) < 0) { 197 pthread_mutex_unlock(¬es->lock); 198 pr_err("Not enough memory for annotating '%s' symbol!\n", 199 sym->name); 200 sleep(1); 201 return; 202 } 203 204 ip = he->ms.map->map_ip(he->ms.map, ip); 205 err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip); 206 207 pthread_mutex_unlock(¬es->lock); 208 209 if (err == -ERANGE && !he->ms.map->erange_warned) 210 ui__warn_map_erange(he->ms.map, sym, ip); 211 } 212 213 static void perf_top__show_details(struct perf_top *top) 214 { 215 struct hist_entry *he = top->sym_filter_entry; 216 struct annotation *notes; 217 struct symbol *symbol; 218 int more; 219 220 if (!he) 221 return; 222 223 symbol = he->ms.sym; 224 notes = symbol__annotation(symbol); 225 226 pthread_mutex_lock(¬es->lock); 227 228 if (notes->src == NULL) 229 goto out_unlock; 230 231 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name); 232 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter); 233 234 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx, 235 0, top->sym_pcnt_filter, top->print_entries, 4); 236 if (top->zero) 237 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx); 238 else 239 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx); 240 if (more != 0) 241 printf("%d lines not displayed, maybe increase display entries [e]\n", more); 242 out_unlock: 243 pthread_mutex_unlock(¬es->lock); 244 } 245 246 static const char CONSOLE_CLEAR[] = "[H[2J"; 247 248 static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel, 249 struct addr_location *al, 250 struct perf_sample *sample) 251 { 252 struct hist_entry *he; 253 254 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period); 255 if (he == NULL) 256 return NULL; 257 258 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); 259 return he; 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; 267 268 puts(CONSOLE_CLEAR); 269 270 perf_top__header_snprintf(top, bf, sizeof(bf)); 271 printf("%s\n", bf); 272 273 perf_top__reset_sample_counters(top); 274 275 printf("%-*.*s\n", win_width, win_width, graph_dotted_line); 276 277 if (top->sym_evsel->hists.stats.nr_lost_warned != 278 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) { 279 top->sym_evsel->hists.stats.nr_lost_warned = 280 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]; 281 color_fprintf(stdout, PERF_COLOR_RED, 282 "WARNING: LOST %d chunks, Check IO/CPU overload", 283 top->sym_evsel->hists.stats.nr_lost_warned); 284 ++printed; 285 } 286 287 if (top->sym_filter_entry) { 288 perf_top__show_details(top); 289 return; 290 } 291 292 hists__collapse_resort_threaded(&top->sym_evsel->hists); 293 hists__output_resort_threaded(&top->sym_evsel->hists); 294 hists__decay_entries_threaded(&top->sym_evsel->hists, 295 top->hide_user_symbols, 296 top->hide_kernel_symbols); 297 hists__output_recalc_col_len(&top->sym_evsel->hists, 298 top->winsize.ws_row - 3); 299 putchar('\n'); 300 hists__fprintf(&top->sym_evsel->hists, false, 301 top->winsize.ws_row - 4 - printed, win_width, stdout); 302 } 303 304 static void prompt_integer(int *target, const char *msg) 305 { 306 char *buf = malloc(0), *p; 307 size_t dummy = 0; 308 int tmp; 309 310 fprintf(stdout, "\n%s: ", msg); 311 if (getline(&buf, &dummy, stdin) < 0) 312 return; 313 314 p = strchr(buf, '\n'); 315 if (p) 316 *p = 0; 317 318 p = buf; 319 while(*p) { 320 if (!isdigit(*p)) 321 goto out_free; 322 p++; 323 } 324 tmp = strtoul(buf, NULL, 10); 325 *target = tmp; 326 out_free: 327 free(buf); 328 } 329 330 static void prompt_percent(int *target, const char *msg) 331 { 332 int tmp = 0; 333 334 prompt_integer(&tmp, msg); 335 if (tmp >= 0 && tmp <= 100) 336 *target = tmp; 337 } 338 339 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg) 340 { 341 char *buf = malloc(0), *p; 342 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL; 343 struct rb_node *next; 344 size_t dummy = 0; 345 346 /* zero counters of active symbol */ 347 if (syme) { 348 __zero_source_counters(syme); 349 top->sym_filter_entry = NULL; 350 } 351 352 fprintf(stdout, "\n%s: ", msg); 353 if (getline(&buf, &dummy, stdin) < 0) 354 goto out_free; 355 356 p = strchr(buf, '\n'); 357 if (p) 358 *p = 0; 359 360 next = rb_first(&top->sym_evsel->hists.entries); 361 while (next) { 362 n = rb_entry(next, struct hist_entry, rb_node); 363 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) { 364 found = n; 365 break; 366 } 367 next = rb_next(&n->rb_node); 368 } 369 370 if (!found) { 371 fprintf(stderr, "Sorry, %s is not active.\n", buf); 372 sleep(1); 373 } else 374 perf_top__parse_source(top, found); 375 376 out_free: 377 free(buf); 378 } 379 380 static void perf_top__print_mapped_keys(struct perf_top *top) 381 { 382 char *name = NULL; 383 384 if (top->sym_filter_entry) { 385 struct symbol *sym = top->sym_filter_entry->ms.sym; 386 name = sym->name; 387 } 388 389 fprintf(stdout, "\nMapped keys:\n"); 390 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs); 391 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries); 392 393 if (top->evlist->nr_entries > 1) 394 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel)); 395 396 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter); 397 398 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter); 399 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 400 fprintf(stdout, "\t[S] stop annotation.\n"); 401 402 fprintf(stdout, 403 "\t[K] hide kernel_symbols symbols. \t(%s)\n", 404 top->hide_kernel_symbols ? "yes" : "no"); 405 fprintf(stdout, 406 "\t[U] hide user symbols. \t(%s)\n", 407 top->hide_user_symbols ? "yes" : "no"); 408 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0); 409 fprintf(stdout, "\t[qQ] quit.\n"); 410 } 411 412 static int perf_top__key_mapped(struct perf_top *top, int c) 413 { 414 switch (c) { 415 case 'd': 416 case 'e': 417 case 'f': 418 case 'z': 419 case 'q': 420 case 'Q': 421 case 'K': 422 case 'U': 423 case 'F': 424 case 's': 425 case 'S': 426 return 1; 427 case 'E': 428 return top->evlist->nr_entries > 1 ? 1 : 0; 429 default: 430 break; 431 } 432 433 return 0; 434 } 435 436 static bool perf_top__handle_keypress(struct perf_top *top, int c) 437 { 438 bool ret = true; 439 440 if (!perf_top__key_mapped(top, c)) { 441 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 442 struct termios tc, save; 443 444 perf_top__print_mapped_keys(top); 445 fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 446 fflush(stdout); 447 448 tcgetattr(0, &save); 449 tc = save; 450 tc.c_lflag &= ~(ICANON | ECHO); 451 tc.c_cc[VMIN] = 0; 452 tc.c_cc[VTIME] = 0; 453 tcsetattr(0, TCSANOW, &tc); 454 455 poll(&stdin_poll, 1, -1); 456 c = getc(stdin); 457 458 tcsetattr(0, TCSAFLUSH, &save); 459 if (!perf_top__key_mapped(top, c)) 460 return ret; 461 } 462 463 switch (c) { 464 case 'd': 465 prompt_integer(&top->delay_secs, "Enter display delay"); 466 if (top->delay_secs < 1) 467 top->delay_secs = 1; 468 break; 469 case 'e': 470 prompt_integer(&top->print_entries, "Enter display entries (lines)"); 471 if (top->print_entries == 0) { 472 struct sigaction act = { 473 .sa_sigaction = perf_top__sig_winch, 474 .sa_flags = SA_SIGINFO, 475 }; 476 perf_top__sig_winch(SIGWINCH, NULL, top); 477 sigaction(SIGWINCH, &act, NULL); 478 } else { 479 perf_top__sig_winch(SIGWINCH, NULL, top); 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 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node) 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 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node) 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->sym_pcnt_filter, 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 perf_top__reset_sample_counters(t); 554 555 if (t->evlist->selected != NULL) 556 t->sym_evsel = t->evlist->selected; 557 558 hists__collapse_resort_threaded(&t->sym_evsel->hists); 559 hists__output_resort_threaded(&t->sym_evsel->hists); 560 hists__decay_entries_threaded(&t->sym_evsel->hists, 561 t->hide_user_symbols, 562 t->hide_kernel_symbols); 563 } 564 565 static void *display_thread_tui(void *arg) 566 { 567 struct perf_evsel *pos; 568 struct perf_top *top = arg; 569 const char *help = "For a higher level overview, try: perf top --sort comm,dso"; 570 struct hist_browser_timer hbt = { 571 .timer = perf_top__sort_new_samples, 572 .arg = top, 573 .refresh = top->delay_secs, 574 }; 575 576 perf_top__sort_new_samples(top); 577 578 /* 579 * Initialize the uid_filter_str, in the future the TUI will allow 580 * Zooming in/out UIDs. For now juse use whatever the user passed 581 * via --uid. 582 */ 583 list_for_each_entry(pos, &top->evlist->entries, node) 584 pos->hists.uid_filter_str = top->record_opts.target.uid_str; 585 586 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, 587 &top->session->header.env); 588 589 done = 1; 590 return NULL; 591 } 592 593 static void *display_thread(void *arg) 594 { 595 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 596 struct termios tc, save; 597 struct perf_top *top = arg; 598 int delay_msecs, c; 599 600 tcgetattr(0, &save); 601 tc = save; 602 tc.c_lflag &= ~(ICANON | ECHO); 603 tc.c_cc[VMIN] = 0; 604 tc.c_cc[VTIME] = 0; 605 606 pthread__unblock_sigwinch(); 607 repeat: 608 delay_msecs = top->delay_secs * 1000; 609 tcsetattr(0, TCSANOW, &tc); 610 /* trash return*/ 611 getc(stdin); 612 613 while (!done) { 614 perf_top__print_sym_table(top); 615 /* 616 * Either timeout expired or we got an EINTR due to SIGWINCH, 617 * refresh screen in both cases. 618 */ 619 switch (poll(&stdin_poll, 1, delay_msecs)) { 620 case 0: 621 continue; 622 case -1: 623 if (errno == EINTR) 624 continue; 625 /* Fall trhu */ 626 default: 627 c = getc(stdin); 628 tcsetattr(0, TCSAFLUSH, &save); 629 630 if (perf_top__handle_keypress(top, c)) 631 goto repeat; 632 done = 1; 633 } 634 } 635 636 return NULL; 637 } 638 639 /* Tag samples to be skipped. */ 640 static const char *skip_symbols[] = { 641 "intel_idle", 642 "default_idle", 643 "native_safe_halt", 644 "cpu_idle", 645 "enter_idle", 646 "exit_idle", 647 "mwait_idle", 648 "mwait_idle_with_hints", 649 "poll_idle", 650 "ppc64_runlatch_off", 651 "pseries_dedicated_idle_sleep", 652 NULL 653 }; 654 655 static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym) 656 { 657 const char *name = sym->name; 658 int i; 659 660 /* 661 * ppc64 uses function descriptors and appends a '.' to the 662 * start of every instruction address. Remove it. 663 */ 664 if (name[0] == '.') 665 name++; 666 667 if (!strcmp(name, "_text") || 668 !strcmp(name, "_etext") || 669 !strcmp(name, "_sinittext") || 670 !strncmp("init_module", name, 11) || 671 !strncmp("cleanup_module", name, 14) || 672 strstr(name, "_text_start") || 673 strstr(name, "_text_end")) 674 return 1; 675 676 for (i = 0; skip_symbols[i]; i++) { 677 if (!strcmp(skip_symbols[i], name)) { 678 sym->ignore = true; 679 break; 680 } 681 } 682 683 return 0; 684 } 685 686 static void perf_event__process_sample(struct perf_tool *tool, 687 const union perf_event *event, 688 struct perf_evsel *evsel, 689 struct perf_sample *sample, 690 struct machine *machine) 691 { 692 struct perf_top *top = container_of(tool, struct perf_top, tool); 693 struct symbol *parent = NULL; 694 u64 ip = event->ip.ip; 695 struct addr_location al; 696 int err; 697 698 if (!machine && perf_guest) { 699 static struct intlist *seen; 700 701 if (!seen) 702 seen = intlist__new(NULL); 703 704 if (!intlist__has_entry(seen, event->ip.pid)) { 705 pr_err("Can't find guest [%d]'s kernel information\n", 706 event->ip.pid); 707 intlist__add(seen, event->ip.pid); 708 } 709 return; 710 } 711 712 if (!machine) { 713 pr_err("%u unprocessable samples recorded.\r", 714 top->session->stats.nr_unprocessable_samples++); 715 return; 716 } 717 718 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) 719 top->exact_samples++; 720 721 if (perf_event__preprocess_sample(event, machine, &al, sample, 722 symbol_filter) < 0 || 723 al.filtered) 724 return; 725 726 if (!top->kptr_restrict_warned && 727 symbol_conf.kptr_restrict && 728 al.cpumode == PERF_RECORD_MISC_KERNEL) { 729 ui__warning( 730 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 731 "Check /proc/sys/kernel/kptr_restrict.\n\n" 732 "Kernel%s samples will not be resolved.\n", 733 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ? 734 " modules" : ""); 735 if (use_browser <= 0) 736 sleep(5); 737 top->kptr_restrict_warned = true; 738 } 739 740 if (al.sym == NULL) { 741 const char *msg = "Kernel samples will not be resolved.\n"; 742 /* 743 * As we do lazy loading of symtabs we only will know if the 744 * specified vmlinux file is invalid when we actually have a 745 * hit in kernel space and then try to load it. So if we get 746 * here and there are _no_ symbols in the DSO backing the 747 * kernel map, bail out. 748 * 749 * We may never get here, for instance, if we use -K/ 750 * --hide-kernel-symbols, even if the user specifies an 751 * invalid --vmlinux ;-) 752 */ 753 if (!top->kptr_restrict_warned && !top->vmlinux_warned && 754 al.map == machine->vmlinux_maps[MAP__FUNCTION] && 755 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) { 756 if (symbol_conf.vmlinux_name) { 757 ui__warning("The %s file can't be used.\n%s", 758 symbol_conf.vmlinux_name, msg); 759 } else { 760 ui__warning("A vmlinux file was not found.\n%s", 761 msg); 762 } 763 764 if (use_browser <= 0) 765 sleep(5); 766 top->vmlinux_warned = true; 767 } 768 } 769 770 if (al.sym == NULL || !al.sym->ignore) { 771 struct hist_entry *he; 772 773 if ((sort__has_parent || symbol_conf.use_callchain) && 774 sample->callchain) { 775 err = machine__resolve_callchain(machine, evsel, 776 al.thread, sample, 777 &parent); 778 779 if (err) 780 return; 781 } 782 783 he = perf_evsel__add_hist_entry(evsel, &al, sample); 784 if (he == NULL) { 785 pr_err("Problem incrementing symbol period, skipping event\n"); 786 return; 787 } 788 789 if (symbol_conf.use_callchain) { 790 err = callchain_append(he->callchain, &callchain_cursor, 791 sample->period); 792 if (err) 793 return; 794 } 795 796 if (top->sort_has_symbols) 797 perf_top__record_precise_ip(top, he, evsel->idx, ip); 798 } 799 800 return; 801 } 802 803 static void perf_top__mmap_read_idx(struct perf_top *top, int idx) 804 { 805 struct perf_sample sample; 806 struct perf_evsel *evsel; 807 struct perf_session *session = top->session; 808 union perf_event *event; 809 struct machine *machine; 810 u8 origin; 811 int ret; 812 813 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) { 814 ret = perf_evlist__parse_sample(top->evlist, event, &sample); 815 if (ret) { 816 pr_err("Can't parse sample, err = %d\n", ret); 817 continue; 818 } 819 820 evsel = perf_evlist__id2evsel(session->evlist, sample.id); 821 assert(evsel != NULL); 822 823 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 824 825 if (event->header.type == PERF_RECORD_SAMPLE) 826 ++top->samples; 827 828 switch (origin) { 829 case PERF_RECORD_MISC_USER: 830 ++top->us_samples; 831 if (top->hide_user_symbols) 832 continue; 833 machine = &session->machines.host; 834 break; 835 case PERF_RECORD_MISC_KERNEL: 836 ++top->kernel_samples; 837 if (top->hide_kernel_symbols) 838 continue; 839 machine = &session->machines.host; 840 break; 841 case PERF_RECORD_MISC_GUEST_KERNEL: 842 ++top->guest_kernel_samples; 843 machine = perf_session__find_machine(session, event->ip.pid); 844 break; 845 case PERF_RECORD_MISC_GUEST_USER: 846 ++top->guest_us_samples; 847 /* 848 * TODO: we don't process guest user from host side 849 * except simple counting. 850 */ 851 /* Fall thru */ 852 default: 853 continue; 854 } 855 856 857 if (event->header.type == PERF_RECORD_SAMPLE) { 858 perf_event__process_sample(&top->tool, event, evsel, 859 &sample, machine); 860 } else if (event->header.type < PERF_RECORD_MAX) { 861 hists__inc_nr_events(&evsel->hists, event->header.type); 862 machine__process_event(machine, event); 863 } else 864 ++session->stats.nr_unknown_events; 865 } 866 } 867 868 static void perf_top__mmap_read(struct perf_top *top) 869 { 870 int i; 871 872 for (i = 0; i < top->evlist->nr_mmaps; i++) 873 perf_top__mmap_read_idx(top, i); 874 } 875 876 static int perf_top__start_counters(struct perf_top *top) 877 { 878 char msg[512]; 879 struct perf_evsel *counter; 880 struct perf_evlist *evlist = top->evlist; 881 struct perf_record_opts *opts = &top->record_opts; 882 883 perf_evlist__config(evlist, opts); 884 885 list_for_each_entry(counter, &evlist->entries, node) { 886 try_again: 887 if (perf_evsel__open(counter, top->evlist->cpus, 888 top->evlist->threads) < 0) { 889 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 890 if (verbose) 891 ui__warning("%s\n", msg); 892 goto try_again; 893 } 894 895 perf_evsel__open_strerror(counter, &opts->target, 896 errno, msg, sizeof(msg)); 897 ui__error("%s\n", msg); 898 goto out_err; 899 } 900 } 901 902 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { 903 ui__error("Failed to mmap with %d (%s)\n", 904 errno, strerror(errno)); 905 goto out_err; 906 } 907 908 return 0; 909 910 out_err: 911 return -1; 912 } 913 914 static int perf_top__setup_sample_type(struct perf_top *top) 915 { 916 if (!top->sort_has_symbols) { 917 if (symbol_conf.use_callchain) { 918 ui__error("Selected -g but \"sym\" not present in --sort/-s."); 919 return -EINVAL; 920 } 921 } else if (callchain_param.mode != CHAIN_NONE) { 922 if (callchain_register_param(&callchain_param) < 0) { 923 ui__error("Can't register callchain params.\n"); 924 return -EINVAL; 925 } 926 } 927 928 return 0; 929 } 930 931 static int __cmd_top(struct perf_top *top) 932 { 933 struct perf_record_opts *opts = &top->record_opts; 934 pthread_t thread; 935 int ret; 936 /* 937 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this 938 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now. 939 */ 940 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL); 941 if (top->session == NULL) 942 return -ENOMEM; 943 944 ret = perf_top__setup_sample_type(top); 945 if (ret) 946 goto out_delete; 947 948 if (perf_target__has_task(&opts->target)) 949 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads, 950 perf_event__process, 951 &top->session->machines.host); 952 else 953 perf_event__synthesize_threads(&top->tool, perf_event__process, 954 &top->session->machines.host); 955 956 ret = perf_top__start_counters(top); 957 if (ret) 958 goto out_delete; 959 960 top->session->evlist = top->evlist; 961 perf_session__set_id_hdr_size(top->session); 962 963 /* 964 * When perf is starting the traced process, all the events (apart from 965 * group members) have enable_on_exec=1 set, so don't spoil it by 966 * prematurely enabling them. 967 * 968 * XXX 'top' still doesn't start workloads like record, trace, but should, 969 * so leave the check here. 970 */ 971 if (!perf_target__none(&opts->target)) 972 perf_evlist__enable(top->evlist); 973 974 /* Wait for a minimal set of events before starting the snapshot */ 975 poll(top->evlist->pollfd, top->evlist->nr_fds, 100); 976 977 perf_top__mmap_read(top); 978 979 ret = -1; 980 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : 981 display_thread), top)) { 982 ui__error("Could not create display thread.\n"); 983 goto out_delete; 984 } 985 986 if (top->realtime_prio) { 987 struct sched_param param; 988 989 param.sched_priority = top->realtime_prio; 990 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 991 ui__error("Could not set realtime priority.\n"); 992 goto out_delete; 993 } 994 } 995 996 while (!done) { 997 u64 hits = top->samples; 998 999 perf_top__mmap_read(top); 1000 1001 if (hits == top->samples) 1002 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100); 1003 } 1004 1005 ret = 0; 1006 out_delete: 1007 perf_session__delete(top->session); 1008 top->session = NULL; 1009 1010 return ret; 1011 } 1012 1013 static int 1014 parse_callchain_opt(const struct option *opt, const char *arg, int unset) 1015 { 1016 /* 1017 * --no-call-graph 1018 */ 1019 if (unset) 1020 return 0; 1021 1022 symbol_conf.use_callchain = true; 1023 1024 return record_parse_callchain_opt(opt, arg, unset); 1025 } 1026 1027 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) 1028 { 1029 int status; 1030 char errbuf[BUFSIZ]; 1031 struct perf_top top = { 1032 .count_filter = 5, 1033 .delay_secs = 2, 1034 .record_opts = { 1035 .mmap_pages = UINT_MAX, 1036 .user_freq = UINT_MAX, 1037 .user_interval = ULLONG_MAX, 1038 .freq = 4000, /* 4 KHz */ 1039 .target = { 1040 .uses_mmap = true, 1041 }, 1042 }, 1043 .sym_pcnt_filter = 5, 1044 }; 1045 struct perf_record_opts *opts = &top.record_opts; 1046 struct perf_target *target = &opts->target; 1047 const struct option options[] = { 1048 OPT_CALLBACK('e', "event", &top.evlist, "event", 1049 "event selector. use 'perf list' to list available events", 1050 parse_events_option), 1051 OPT_U64('c', "count", &opts->user_interval, "event period to sample"), 1052 OPT_STRING('p', "pid", &target->pid, "pid", 1053 "profile events on existing process id"), 1054 OPT_STRING('t', "tid", &target->tid, "tid", 1055 "profile events on existing thread id"), 1056 OPT_BOOLEAN('a', "all-cpus", &target->system_wide, 1057 "system-wide collection from all CPUs"), 1058 OPT_STRING('C', "cpu", &target->cpu_list, "cpu", 1059 "list of cpus to monitor"), 1060 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 1061 "file", "vmlinux pathname"), 1062 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, 1063 "hide kernel symbols"), 1064 OPT_UINTEGER('m', "mmap-pages", &opts->mmap_pages, 1065 "number of mmap data pages"), 1066 OPT_INTEGER('r', "realtime", &top.realtime_prio, 1067 "collect data with this RT SCHED_FIFO priority"), 1068 OPT_INTEGER('d', "delay", &top.delay_secs, 1069 "number of seconds to delay between refreshes"), 1070 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab, 1071 "dump the symbol table used for profiling"), 1072 OPT_INTEGER('f', "count-filter", &top.count_filter, 1073 "only display functions with more events than this"), 1074 OPT_BOOLEAN('g', "group", &opts->group, 1075 "put the counters into a counter group"), 1076 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit, 1077 "child tasks do not inherit counters"), 1078 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name", 1079 "symbol to annotate"), 1080 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"), 1081 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"), 1082 OPT_INTEGER('E', "entries", &top.print_entries, 1083 "display this many functions"), 1084 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, 1085 "hide user symbols"), 1086 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"), 1087 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"), 1088 OPT_INCR('v', "verbose", &verbose, 1089 "be more verbose (show counter open errors, etc)"), 1090 OPT_STRING('s', "sort", &sort_order, "key[,key2...]", 1091 "sort by key(s): pid, comm, dso, symbol, parent"), 1092 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, 1093 "Show a column with the number of samples"), 1094 OPT_CALLBACK_DEFAULT('G', "call-graph", &top.record_opts, 1095 "mode[,dump_size]", record_callchain_help, 1096 &parse_callchain_opt, "fp"), 1097 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, 1098 "Show a column with the sum of periods"), 1099 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", 1100 "only consider symbols in these dsos"), 1101 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]", 1102 "only consider symbols in these comms"), 1103 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", 1104 "only consider these symbols"), 1105 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src, 1106 "Interleave source code with assembly code (default)"), 1107 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw, 1108 "Display raw encoding of assembly instructions (default)"), 1109 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style", 1110 "Specify disassembler style (e.g. -M intel for intel syntax)"), 1111 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"), 1112 OPT_END() 1113 }; 1114 const char * const top_usage[] = { 1115 "perf top [<options>]", 1116 NULL 1117 }; 1118 1119 top.evlist = perf_evlist__new(NULL, NULL); 1120 if (top.evlist == NULL) 1121 return -ENOMEM; 1122 1123 symbol_conf.exclude_other = false; 1124 1125 argc = parse_options(argc, argv, options, top_usage, 0); 1126 if (argc) 1127 usage_with_options(top_usage, options); 1128 1129 if (sort_order == default_sort_order) 1130 sort_order = "dso,symbol"; 1131 1132 if (setup_sorting() < 0) 1133 usage_with_options(top_usage, options); 1134 1135 if (top.use_stdio) 1136 use_browser = 0; 1137 else if (top.use_tui) 1138 use_browser = 1; 1139 1140 setup_browser(false); 1141 1142 status = perf_target__validate(target); 1143 if (status) { 1144 perf_target__strerror(target, status, errbuf, BUFSIZ); 1145 ui__warning("%s", errbuf); 1146 } 1147 1148 status = perf_target__parse_uid(target); 1149 if (status) { 1150 int saved_errno = errno; 1151 1152 perf_target__strerror(target, status, errbuf, BUFSIZ); 1153 ui__error("%s", errbuf); 1154 1155 status = -saved_errno; 1156 goto out_delete_evlist; 1157 } 1158 1159 if (perf_target__none(target)) 1160 target->system_wide = true; 1161 1162 if (perf_evlist__create_maps(top.evlist, target) < 0) 1163 usage_with_options(top_usage, options); 1164 1165 if (!top.evlist->nr_entries && 1166 perf_evlist__add_default(top.evlist) < 0) { 1167 ui__error("Not enough memory for event selector list\n"); 1168 goto out_delete_maps; 1169 } 1170 1171 symbol_conf.nr_events = top.evlist->nr_entries; 1172 1173 if (top.delay_secs < 1) 1174 top.delay_secs = 1; 1175 1176 if (opts->user_interval != ULLONG_MAX) 1177 opts->default_interval = opts->user_interval; 1178 if (opts->user_freq != UINT_MAX) 1179 opts->freq = opts->user_freq; 1180 1181 /* 1182 * User specified count overrides default frequency. 1183 */ 1184 if (opts->default_interval) 1185 opts->freq = 0; 1186 else if (opts->freq) { 1187 opts->default_interval = opts->freq; 1188 } else { 1189 ui__error("frequency and count are zero, aborting\n"); 1190 status = -EINVAL; 1191 goto out_delete_maps; 1192 } 1193 1194 top.sym_evsel = perf_evlist__first(top.evlist); 1195 1196 symbol_conf.priv_size = sizeof(struct annotation); 1197 1198 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); 1199 if (symbol__init() < 0) 1200 return -1; 1201 1202 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout); 1203 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout); 1204 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout); 1205 1206 /* 1207 * Avoid annotation data structures overhead when symbols aren't on the 1208 * sort list. 1209 */ 1210 top.sort_has_symbols = sort_sym.list.next != NULL; 1211 1212 get_term_dimensions(&top.winsize); 1213 if (top.print_entries == 0) { 1214 struct sigaction act = { 1215 .sa_sigaction = perf_top__sig_winch, 1216 .sa_flags = SA_SIGINFO, 1217 }; 1218 perf_top__update_print_entries(&top); 1219 sigaction(SIGWINCH, &act, NULL); 1220 } 1221 1222 status = __cmd_top(&top); 1223 1224 out_delete_maps: 1225 perf_evlist__delete_maps(top.evlist); 1226 out_delete_evlist: 1227 perf_evlist__delete(top.evlist); 1228 1229 return status; 1230 } 1231