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, 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 sample->weight); 256 if (he == NULL) 257 return NULL; 258 259 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE); 260 return he; 261 } 262 263 static void perf_top__print_sym_table(struct perf_top *top) 264 { 265 char bf[160]; 266 int printed = 0; 267 const int win_width = top->winsize.ws_col - 1; 268 269 puts(CONSOLE_CLEAR); 270 271 perf_top__header_snprintf(top, bf, sizeof(bf)); 272 printf("%s\n", bf); 273 274 perf_top__reset_sample_counters(top); 275 276 printf("%-*.*s\n", win_width, win_width, graph_dotted_line); 277 278 if (top->sym_evsel->hists.stats.nr_lost_warned != 279 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) { 280 top->sym_evsel->hists.stats.nr_lost_warned = 281 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]; 282 color_fprintf(stdout, PERF_COLOR_RED, 283 "WARNING: LOST %d chunks, Check IO/CPU overload", 284 top->sym_evsel->hists.stats.nr_lost_warned); 285 ++printed; 286 } 287 288 if (top->sym_filter_entry) { 289 perf_top__show_details(top); 290 return; 291 } 292 293 hists__collapse_resort_threaded(&top->sym_evsel->hists); 294 hists__output_resort_threaded(&top->sym_evsel->hists); 295 hists__decay_entries_threaded(&top->sym_evsel->hists, 296 top->hide_user_symbols, 297 top->hide_kernel_symbols); 298 hists__output_recalc_col_len(&top->sym_evsel->hists, 299 top->winsize.ws_row - 3); 300 putchar('\n'); 301 hists__fprintf(&top->sym_evsel->hists, false, 302 top->winsize.ws_row - 4 - printed, win_width, stdout); 303 } 304 305 static void prompt_integer(int *target, const char *msg) 306 { 307 char *buf = malloc(0), *p; 308 size_t dummy = 0; 309 int tmp; 310 311 fprintf(stdout, "\n%s: ", msg); 312 if (getline(&buf, &dummy, stdin) < 0) 313 return; 314 315 p = strchr(buf, '\n'); 316 if (p) 317 *p = 0; 318 319 p = buf; 320 while(*p) { 321 if (!isdigit(*p)) 322 goto out_free; 323 p++; 324 } 325 tmp = strtoul(buf, NULL, 10); 326 *target = tmp; 327 out_free: 328 free(buf); 329 } 330 331 static void prompt_percent(int *target, const char *msg) 332 { 333 int tmp = 0; 334 335 prompt_integer(&tmp, msg); 336 if (tmp >= 0 && tmp <= 100) 337 *target = tmp; 338 } 339 340 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg) 341 { 342 char *buf = malloc(0), *p; 343 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL; 344 struct rb_node *next; 345 size_t dummy = 0; 346 347 /* zero counters of active symbol */ 348 if (syme) { 349 __zero_source_counters(syme); 350 top->sym_filter_entry = NULL; 351 } 352 353 fprintf(stdout, "\n%s: ", msg); 354 if (getline(&buf, &dummy, stdin) < 0) 355 goto out_free; 356 357 p = strchr(buf, '\n'); 358 if (p) 359 *p = 0; 360 361 next = rb_first(&top->sym_evsel->hists.entries); 362 while (next) { 363 n = rb_entry(next, struct hist_entry, rb_node); 364 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) { 365 found = n; 366 break; 367 } 368 next = rb_next(&n->rb_node); 369 } 370 371 if (!found) { 372 fprintf(stderr, "Sorry, %s is not active.\n", buf); 373 sleep(1); 374 } else 375 perf_top__parse_source(top, found); 376 377 out_free: 378 free(buf); 379 } 380 381 static void perf_top__print_mapped_keys(struct perf_top *top) 382 { 383 char *name = NULL; 384 385 if (top->sym_filter_entry) { 386 struct symbol *sym = top->sym_filter_entry->ms.sym; 387 name = sym->name; 388 } 389 390 fprintf(stdout, "\nMapped keys:\n"); 391 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs); 392 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries); 393 394 if (top->evlist->nr_entries > 1) 395 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel)); 396 397 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter); 398 399 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter); 400 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 401 fprintf(stdout, "\t[S] stop annotation.\n"); 402 403 fprintf(stdout, 404 "\t[K] hide kernel_symbols symbols. \t(%s)\n", 405 top->hide_kernel_symbols ? "yes" : "no"); 406 fprintf(stdout, 407 "\t[U] hide user symbols. \t(%s)\n", 408 top->hide_user_symbols ? "yes" : "no"); 409 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0); 410 fprintf(stdout, "\t[qQ] quit.\n"); 411 } 412 413 static int perf_top__key_mapped(struct perf_top *top, int c) 414 { 415 switch (c) { 416 case 'd': 417 case 'e': 418 case 'f': 419 case 'z': 420 case 'q': 421 case 'Q': 422 case 'K': 423 case 'U': 424 case 'F': 425 case 's': 426 case 'S': 427 return 1; 428 case 'E': 429 return top->evlist->nr_entries > 1 ? 1 : 0; 430 default: 431 break; 432 } 433 434 return 0; 435 } 436 437 static bool perf_top__handle_keypress(struct perf_top *top, int c) 438 { 439 bool ret = true; 440 441 if (!perf_top__key_mapped(top, c)) { 442 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 443 struct termios tc, save; 444 445 perf_top__print_mapped_keys(top); 446 fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 447 fflush(stdout); 448 449 tcgetattr(0, &save); 450 tc = save; 451 tc.c_lflag &= ~(ICANON | ECHO); 452 tc.c_cc[VMIN] = 0; 453 tc.c_cc[VTIME] = 0; 454 tcsetattr(0, TCSANOW, &tc); 455 456 poll(&stdin_poll, 1, -1); 457 c = getc(stdin); 458 459 tcsetattr(0, TCSAFLUSH, &save); 460 if (!perf_top__key_mapped(top, c)) 461 return ret; 462 } 463 464 switch (c) { 465 case 'd': 466 prompt_integer(&top->delay_secs, "Enter display delay"); 467 if (top->delay_secs < 1) 468 top->delay_secs = 1; 469 break; 470 case 'e': 471 prompt_integer(&top->print_entries, "Enter display entries (lines)"); 472 if (top->print_entries == 0) { 473 struct sigaction act = { 474 .sa_sigaction = perf_top__sig_winch, 475 .sa_flags = SA_SIGINFO, 476 }; 477 perf_top__sig_winch(SIGWINCH, NULL, top); 478 sigaction(SIGWINCH, &act, NULL); 479 } else { 480 perf_top__sig_winch(SIGWINCH, NULL, top); 481 signal(SIGWINCH, SIG_DFL); 482 } 483 break; 484 case 'E': 485 if (top->evlist->nr_entries > 1) { 486 /* Select 0 as the default event: */ 487 int counter = 0; 488 489 fprintf(stderr, "\nAvailable events:"); 490 491 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node) 492 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel)); 493 494 prompt_integer(&counter, "Enter details event counter"); 495 496 if (counter >= top->evlist->nr_entries) { 497 top->sym_evsel = perf_evlist__first(top->evlist); 498 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel)); 499 sleep(1); 500 break; 501 } 502 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node) 503 if (top->sym_evsel->idx == counter) 504 break; 505 } else 506 top->sym_evsel = perf_evlist__first(top->evlist); 507 break; 508 case 'f': 509 prompt_integer(&top->count_filter, "Enter display event count filter"); 510 break; 511 case 'F': 512 prompt_percent(&top->sym_pcnt_filter, 513 "Enter details display event filter (percent)"); 514 break; 515 case 'K': 516 top->hide_kernel_symbols = !top->hide_kernel_symbols; 517 break; 518 case 'q': 519 case 'Q': 520 printf("exiting.\n"); 521 if (top->dump_symtab) 522 perf_session__fprintf_dsos(top->session, stderr); 523 ret = false; 524 break; 525 case 's': 526 perf_top__prompt_symbol(top, "Enter details symbol"); 527 break; 528 case 'S': 529 if (!top->sym_filter_entry) 530 break; 531 else { 532 struct hist_entry *syme = top->sym_filter_entry; 533 534 top->sym_filter_entry = NULL; 535 __zero_source_counters(syme); 536 } 537 break; 538 case 'U': 539 top->hide_user_symbols = !top->hide_user_symbols; 540 break; 541 case 'z': 542 top->zero = !top->zero; 543 break; 544 default: 545 break; 546 } 547 548 return ret; 549 } 550 551 static void perf_top__sort_new_samples(void *arg) 552 { 553 struct perf_top *t = arg; 554 perf_top__reset_sample_counters(t); 555 556 if (t->evlist->selected != NULL) 557 t->sym_evsel = t->evlist->selected; 558 559 hists__collapse_resort_threaded(&t->sym_evsel->hists); 560 hists__output_resort_threaded(&t->sym_evsel->hists); 561 hists__decay_entries_threaded(&t->sym_evsel->hists, 562 t->hide_user_symbols, 563 t->hide_kernel_symbols); 564 } 565 566 static void *display_thread_tui(void *arg) 567 { 568 struct perf_evsel *pos; 569 struct perf_top *top = arg; 570 const char *help = "For a higher level overview, try: perf top --sort comm,dso"; 571 struct hist_browser_timer hbt = { 572 .timer = perf_top__sort_new_samples, 573 .arg = top, 574 .refresh = top->delay_secs, 575 }; 576 577 perf_top__sort_new_samples(top); 578 579 /* 580 * Initialize the uid_filter_str, in the future the TUI will allow 581 * Zooming in/out UIDs. For now juse use whatever the user passed 582 * via --uid. 583 */ 584 list_for_each_entry(pos, &top->evlist->entries, node) 585 pos->hists.uid_filter_str = top->record_opts.target.uid_str; 586 587 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, 588 &top->session->header.env); 589 590 done = 1; 591 return NULL; 592 } 593 594 static void *display_thread(void *arg) 595 { 596 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 597 struct termios tc, save; 598 struct perf_top *top = arg; 599 int delay_msecs, c; 600 601 tcgetattr(0, &save); 602 tc = save; 603 tc.c_lflag &= ~(ICANON | ECHO); 604 tc.c_cc[VMIN] = 0; 605 tc.c_cc[VTIME] = 0; 606 607 pthread__unblock_sigwinch(); 608 repeat: 609 delay_msecs = top->delay_secs * 1000; 610 tcsetattr(0, TCSANOW, &tc); 611 /* trash return*/ 612 getc(stdin); 613 614 while (!done) { 615 perf_top__print_sym_table(top); 616 /* 617 * Either timeout expired or we got an EINTR due to SIGWINCH, 618 * refresh screen in both cases. 619 */ 620 switch (poll(&stdin_poll, 1, delay_msecs)) { 621 case 0: 622 continue; 623 case -1: 624 if (errno == EINTR) 625 continue; 626 /* Fall trhu */ 627 default: 628 c = getc(stdin); 629 tcsetattr(0, TCSAFLUSH, &save); 630 631 if (perf_top__handle_keypress(top, c)) 632 goto repeat; 633 done = 1; 634 } 635 } 636 637 return NULL; 638 } 639 640 /* Tag samples to be skipped. */ 641 static const char *skip_symbols[] = { 642 "intel_idle", 643 "default_idle", 644 "native_safe_halt", 645 "cpu_idle", 646 "enter_idle", 647 "exit_idle", 648 "mwait_idle", 649 "mwait_idle_with_hints", 650 "poll_idle", 651 "ppc64_runlatch_off", 652 "pseries_dedicated_idle_sleep", 653 NULL 654 }; 655 656 static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym) 657 { 658 const char *name = sym->name; 659 int i; 660 661 /* 662 * ppc64 uses function descriptors and appends a '.' to the 663 * start of every instruction address. Remove it. 664 */ 665 if (name[0] == '.') 666 name++; 667 668 if (!strcmp(name, "_text") || 669 !strcmp(name, "_etext") || 670 !strcmp(name, "_sinittext") || 671 !strncmp("init_module", name, 11) || 672 !strncmp("cleanup_module", name, 14) || 673 strstr(name, "_text_start") || 674 strstr(name, "_text_end")) 675 return 1; 676 677 for (i = 0; skip_symbols[i]; i++) { 678 if (!strcmp(skip_symbols[i], name)) { 679 sym->ignore = true; 680 break; 681 } 682 } 683 684 return 0; 685 } 686 687 static void perf_event__process_sample(struct perf_tool *tool, 688 const union perf_event *event, 689 struct perf_evsel *evsel, 690 struct perf_sample *sample, 691 struct machine *machine) 692 { 693 struct perf_top *top = container_of(tool, struct perf_top, tool); 694 struct symbol *parent = NULL; 695 u64 ip = event->ip.ip; 696 struct addr_location al; 697 int err; 698 699 if (!machine && perf_guest) { 700 static struct intlist *seen; 701 702 if (!seen) 703 seen = intlist__new(NULL); 704 705 if (!intlist__has_entry(seen, event->ip.pid)) { 706 pr_err("Can't find guest [%d]'s kernel information\n", 707 event->ip.pid); 708 intlist__add(seen, event->ip.pid); 709 } 710 return; 711 } 712 713 if (!machine) { 714 pr_err("%u unprocessable samples recorded.\r", 715 top->session->stats.nr_unprocessable_samples++); 716 return; 717 } 718 719 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) 720 top->exact_samples++; 721 722 if (perf_event__preprocess_sample(event, machine, &al, sample, 723 symbol_filter) < 0 || 724 al.filtered) 725 return; 726 727 if (!top->kptr_restrict_warned && 728 symbol_conf.kptr_restrict && 729 al.cpumode == PERF_RECORD_MISC_KERNEL) { 730 ui__warning( 731 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 732 "Check /proc/sys/kernel/kptr_restrict.\n\n" 733 "Kernel%s samples will not be resolved.\n", 734 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ? 735 " modules" : ""); 736 if (use_browser <= 0) 737 sleep(5); 738 top->kptr_restrict_warned = true; 739 } 740 741 if (al.sym == NULL) { 742 const char *msg = "Kernel samples will not be resolved.\n"; 743 /* 744 * As we do lazy loading of symtabs we only will know if the 745 * specified vmlinux file is invalid when we actually have a 746 * hit in kernel space and then try to load it. So if we get 747 * here and there are _no_ symbols in the DSO backing the 748 * kernel map, bail out. 749 * 750 * We may never get here, for instance, if we use -K/ 751 * --hide-kernel-symbols, even if the user specifies an 752 * invalid --vmlinux ;-) 753 */ 754 if (!top->kptr_restrict_warned && !top->vmlinux_warned && 755 al.map == machine->vmlinux_maps[MAP__FUNCTION] && 756 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) { 757 if (symbol_conf.vmlinux_name) { 758 ui__warning("The %s file can't be used.\n%s", 759 symbol_conf.vmlinux_name, msg); 760 } else { 761 ui__warning("A vmlinux file was not found.\n%s", 762 msg); 763 } 764 765 if (use_browser <= 0) 766 sleep(5); 767 top->vmlinux_warned = true; 768 } 769 } 770 771 if (al.sym == NULL || !al.sym->ignore) { 772 struct hist_entry *he; 773 774 if ((sort__has_parent || symbol_conf.use_callchain) && 775 sample->callchain) { 776 err = machine__resolve_callchain(machine, evsel, 777 al.thread, sample, 778 &parent); 779 780 if (err) 781 return; 782 } 783 784 he = perf_evsel__add_hist_entry(evsel, &al, sample); 785 if (he == NULL) { 786 pr_err("Problem incrementing symbol period, skipping event\n"); 787 return; 788 } 789 790 if (symbol_conf.use_callchain) { 791 err = callchain_append(he->callchain, &callchain_cursor, 792 sample->period); 793 if (err) 794 return; 795 } 796 797 if (top->sort_has_symbols) 798 perf_top__record_precise_ip(top, he, evsel->idx, ip); 799 } 800 801 return; 802 } 803 804 static void perf_top__mmap_read_idx(struct perf_top *top, int idx) 805 { 806 struct perf_sample sample; 807 struct perf_evsel *evsel; 808 struct perf_session *session = top->session; 809 union perf_event *event; 810 struct machine *machine; 811 u8 origin; 812 int ret; 813 814 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) { 815 ret = perf_evlist__parse_sample(top->evlist, event, &sample); 816 if (ret) { 817 pr_err("Can't parse sample, err = %d\n", ret); 818 continue; 819 } 820 821 evsel = perf_evlist__id2evsel(session->evlist, sample.id); 822 assert(evsel != NULL); 823 824 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 825 826 if (event->header.type == PERF_RECORD_SAMPLE) 827 ++top->samples; 828 829 switch (origin) { 830 case PERF_RECORD_MISC_USER: 831 ++top->us_samples; 832 if (top->hide_user_symbols) 833 continue; 834 machine = &session->machines.host; 835 break; 836 case PERF_RECORD_MISC_KERNEL: 837 ++top->kernel_samples; 838 if (top->hide_kernel_symbols) 839 continue; 840 machine = &session->machines.host; 841 break; 842 case PERF_RECORD_MISC_GUEST_KERNEL: 843 ++top->guest_kernel_samples; 844 machine = perf_session__find_machine(session, event->ip.pid); 845 break; 846 case PERF_RECORD_MISC_GUEST_USER: 847 ++top->guest_us_samples; 848 /* 849 * TODO: we don't process guest user from host side 850 * except simple counting. 851 */ 852 /* Fall thru */ 853 default: 854 continue; 855 } 856 857 858 if (event->header.type == PERF_RECORD_SAMPLE) { 859 perf_event__process_sample(&top->tool, event, evsel, 860 &sample, machine); 861 } else if (event->header.type < PERF_RECORD_MAX) { 862 hists__inc_nr_events(&evsel->hists, event->header.type); 863 machine__process_event(machine, event); 864 } else 865 ++session->stats.nr_unknown_events; 866 } 867 } 868 869 static void perf_top__mmap_read(struct perf_top *top) 870 { 871 int i; 872 873 for (i = 0; i < top->evlist->nr_mmaps; i++) 874 perf_top__mmap_read_idx(top, i); 875 } 876 877 static int perf_top__start_counters(struct perf_top *top) 878 { 879 char msg[512]; 880 struct perf_evsel *counter; 881 struct perf_evlist *evlist = top->evlist; 882 struct perf_record_opts *opts = &top->record_opts; 883 884 perf_evlist__config(evlist, opts); 885 886 list_for_each_entry(counter, &evlist->entries, node) { 887 try_again: 888 if (perf_evsel__open(counter, top->evlist->cpus, 889 top->evlist->threads) < 0) { 890 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 891 if (verbose) 892 ui__warning("%s\n", msg); 893 goto try_again; 894 } 895 896 perf_evsel__open_strerror(counter, &opts->target, 897 errno, msg, sizeof(msg)); 898 ui__error("%s\n", msg); 899 goto out_err; 900 } 901 } 902 903 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) { 904 ui__error("Failed to mmap with %d (%s)\n", 905 errno, strerror(errno)); 906 goto out_err; 907 } 908 909 return 0; 910 911 out_err: 912 return -1; 913 } 914 915 static int perf_top__setup_sample_type(struct perf_top *top) 916 { 917 if (!top->sort_has_symbols) { 918 if (symbol_conf.use_callchain) { 919 ui__error("Selected -g but \"sym\" not present in --sort/-s."); 920 return -EINVAL; 921 } 922 } else if (callchain_param.mode != CHAIN_NONE) { 923 if (callchain_register_param(&callchain_param) < 0) { 924 ui__error("Can't register callchain params.\n"); 925 return -EINVAL; 926 } 927 } 928 929 return 0; 930 } 931 932 static int __cmd_top(struct perf_top *top) 933 { 934 struct perf_record_opts *opts = &top->record_opts; 935 pthread_t thread; 936 int ret; 937 /* 938 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this 939 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now. 940 */ 941 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL); 942 if (top->session == NULL) 943 return -ENOMEM; 944 945 ret = perf_top__setup_sample_type(top); 946 if (ret) 947 goto out_delete; 948 949 if (perf_target__has_task(&opts->target)) 950 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads, 951 perf_event__process, 952 &top->session->machines.host); 953 else 954 perf_event__synthesize_threads(&top->tool, perf_event__process, 955 &top->session->machines.host); 956 957 ret = perf_top__start_counters(top); 958 if (ret) 959 goto out_delete; 960 961 top->session->evlist = top->evlist; 962 perf_session__set_id_hdr_size(top->session); 963 964 /* 965 * When perf is starting the traced process, all the events (apart from 966 * group members) have enable_on_exec=1 set, so don't spoil it by 967 * prematurely enabling them. 968 * 969 * XXX 'top' still doesn't start workloads like record, trace, but should, 970 * so leave the check here. 971 */ 972 if (!perf_target__none(&opts->target)) 973 perf_evlist__enable(top->evlist); 974 975 /* Wait for a minimal set of events before starting the snapshot */ 976 poll(top->evlist->pollfd, top->evlist->nr_fds, 100); 977 978 perf_top__mmap_read(top); 979 980 ret = -1; 981 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : 982 display_thread), top)) { 983 ui__error("Could not create display thread.\n"); 984 goto out_delete; 985 } 986 987 if (top->realtime_prio) { 988 struct sched_param param; 989 990 param.sched_priority = top->realtime_prio; 991 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 992 ui__error("Could not set realtime priority.\n"); 993 goto out_delete; 994 } 995 } 996 997 while (!done) { 998 u64 hits = top->samples; 999 1000 perf_top__mmap_read(top); 1001 1002 if (hits == top->samples) 1003 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100); 1004 } 1005 1006 ret = 0; 1007 out_delete: 1008 perf_session__delete(top->session); 1009 top->session = NULL; 1010 1011 return ret; 1012 } 1013 1014 static int 1015 parse_callchain_opt(const struct option *opt, const char *arg, int unset) 1016 { 1017 /* 1018 * --no-call-graph 1019 */ 1020 if (unset) 1021 return 0; 1022 1023 symbol_conf.use_callchain = true; 1024 1025 return record_parse_callchain_opt(opt, arg, unset); 1026 } 1027 1028 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) 1029 { 1030 int status; 1031 char errbuf[BUFSIZ]; 1032 struct perf_top top = { 1033 .count_filter = 5, 1034 .delay_secs = 2, 1035 .record_opts = { 1036 .mmap_pages = UINT_MAX, 1037 .user_freq = UINT_MAX, 1038 .user_interval = ULLONG_MAX, 1039 .freq = 4000, /* 4 KHz */ 1040 .target = { 1041 .uses_mmap = true, 1042 }, 1043 }, 1044 .sym_pcnt_filter = 5, 1045 }; 1046 struct perf_record_opts *opts = &top.record_opts; 1047 struct perf_target *target = &opts->target; 1048 const struct option options[] = { 1049 OPT_CALLBACK('e', "event", &top.evlist, "event", 1050 "event selector. use 'perf list' to list available events", 1051 parse_events_option), 1052 OPT_U64('c', "count", &opts->user_interval, "event period to sample"), 1053 OPT_STRING('p', "pid", &target->pid, "pid", 1054 "profile events on existing process id"), 1055 OPT_STRING('t', "tid", &target->tid, "tid", 1056 "profile events on existing thread id"), 1057 OPT_BOOLEAN('a', "all-cpus", &target->system_wide, 1058 "system-wide collection from all CPUs"), 1059 OPT_STRING('C', "cpu", &target->cpu_list, "cpu", 1060 "list of cpus to monitor"), 1061 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 1062 "file", "vmlinux pathname"), 1063 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, 1064 "hide kernel symbols"), 1065 OPT_UINTEGER('m', "mmap-pages", &opts->mmap_pages, 1066 "number of mmap data pages"), 1067 OPT_INTEGER('r', "realtime", &top.realtime_prio, 1068 "collect data with this RT SCHED_FIFO priority"), 1069 OPT_INTEGER('d', "delay", &top.delay_secs, 1070 "number of seconds to delay between refreshes"), 1071 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab, 1072 "dump the symbol table used for profiling"), 1073 OPT_INTEGER('f', "count-filter", &top.count_filter, 1074 "only display functions with more events than this"), 1075 OPT_BOOLEAN('g', "group", &opts->group, 1076 "put the counters into a counter group"), 1077 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit, 1078 "child tasks do not inherit counters"), 1079 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name", 1080 "symbol to annotate"), 1081 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"), 1082 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"), 1083 OPT_INTEGER('E', "entries", &top.print_entries, 1084 "display this many functions"), 1085 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, 1086 "hide user symbols"), 1087 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"), 1088 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"), 1089 OPT_INCR('v', "verbose", &verbose, 1090 "be more verbose (show counter open errors, etc)"), 1091 OPT_STRING('s', "sort", &sort_order, "key[,key2...]", 1092 "sort by key(s): pid, comm, dso, symbol, parent, weight, local_weight"), 1093 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples, 1094 "Show a column with the number of samples"), 1095 OPT_CALLBACK_DEFAULT('G', "call-graph", &top.record_opts, 1096 "mode[,dump_size]", record_callchain_help, 1097 &parse_callchain_opt, "fp"), 1098 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period, 1099 "Show a column with the sum of periods"), 1100 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]", 1101 "only consider symbols in these dsos"), 1102 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]", 1103 "only consider symbols in these comms"), 1104 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]", 1105 "only consider these symbols"), 1106 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src, 1107 "Interleave source code with assembly code (default)"), 1108 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw, 1109 "Display raw encoding of assembly instructions (default)"), 1110 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style", 1111 "Specify disassembler style (e.g. -M intel for intel syntax)"), 1112 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"), 1113 OPT_END() 1114 }; 1115 const char * const top_usage[] = { 1116 "perf top [<options>]", 1117 NULL 1118 }; 1119 1120 top.evlist = perf_evlist__new(); 1121 if (top.evlist == NULL) 1122 return -ENOMEM; 1123 1124 symbol_conf.exclude_other = false; 1125 1126 argc = parse_options(argc, argv, options, top_usage, 0); 1127 if (argc) 1128 usage_with_options(top_usage, options); 1129 1130 if (sort_order == default_sort_order) 1131 sort_order = "dso,symbol"; 1132 1133 if (setup_sorting() < 0) 1134 usage_with_options(top_usage, options); 1135 1136 if (top.use_stdio) 1137 use_browser = 0; 1138 else if (top.use_tui) 1139 use_browser = 1; 1140 1141 setup_browser(false); 1142 1143 status = perf_target__validate(target); 1144 if (status) { 1145 perf_target__strerror(target, status, errbuf, BUFSIZ); 1146 ui__warning("%s", errbuf); 1147 } 1148 1149 status = perf_target__parse_uid(target); 1150 if (status) { 1151 int saved_errno = errno; 1152 1153 perf_target__strerror(target, status, errbuf, BUFSIZ); 1154 ui__error("%s", errbuf); 1155 1156 status = -saved_errno; 1157 goto out_delete_evlist; 1158 } 1159 1160 if (perf_target__none(target)) 1161 target->system_wide = true; 1162 1163 if (perf_evlist__create_maps(top.evlist, target) < 0) 1164 usage_with_options(top_usage, options); 1165 1166 if (!top.evlist->nr_entries && 1167 perf_evlist__add_default(top.evlist) < 0) { 1168 ui__error("Not enough memory for event selector list\n"); 1169 goto out_delete_maps; 1170 } 1171 1172 symbol_conf.nr_events = top.evlist->nr_entries; 1173 1174 if (top.delay_secs < 1) 1175 top.delay_secs = 1; 1176 1177 if (opts->user_interval != ULLONG_MAX) 1178 opts->default_interval = opts->user_interval; 1179 if (opts->user_freq != UINT_MAX) 1180 opts->freq = opts->user_freq; 1181 1182 /* 1183 * User specified count overrides default frequency. 1184 */ 1185 if (opts->default_interval) 1186 opts->freq = 0; 1187 else if (opts->freq) { 1188 opts->default_interval = opts->freq; 1189 } else { 1190 ui__error("frequency and count are zero, aborting\n"); 1191 status = -EINVAL; 1192 goto out_delete_maps; 1193 } 1194 1195 top.sym_evsel = perf_evlist__first(top.evlist); 1196 1197 symbol_conf.priv_size = sizeof(struct annotation); 1198 1199 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); 1200 if (symbol__init() < 0) 1201 return -1; 1202 1203 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout); 1204 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout); 1205 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout); 1206 1207 /* 1208 * Avoid annotation data structures overhead when symbols aren't on the 1209 * sort list. 1210 */ 1211 top.sort_has_symbols = sort_sym.list.next != NULL; 1212 1213 get_term_dimensions(&top.winsize); 1214 if (top.print_entries == 0) { 1215 struct sigaction act = { 1216 .sa_sigaction = perf_top__sig_winch, 1217 .sa_flags = SA_SIGINFO, 1218 }; 1219 perf_top__update_print_entries(&top); 1220 sigaction(SIGWINCH, &act, NULL); 1221 } 1222 1223 status = __cmd_top(&top); 1224 1225 out_delete_maps: 1226 perf_evlist__delete_maps(top.evlist); 1227 out_delete_evlist: 1228 perf_evlist__delete(top.evlist); 1229 1230 return status; 1231 } 1232