builtin-top.c revision 8a1715044713722b9fa01419a2148a4a2a67aae5
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 * 9 * Improvements and fixes by: 10 * 11 * Arjan van de Ven <arjan@linux.intel.com> 12 * Yanmin Zhang <yanmin.zhang@intel.com> 13 * Wu Fengguang <fengguang.wu@intel.com> 14 * Mike Galbraith <efault@gmx.de> 15 * Paul Mackerras <paulus@samba.org> 16 * 17 * Released under the GPL v2. (and only v2, not any later version) 18 */ 19#include "builtin.h" 20 21#include "perf.h" 22 23#include "util/annotate.h" 24#include "util/cache.h" 25#include "util/color.h" 26#include "util/evlist.h" 27#include "util/evsel.h" 28#include "util/session.h" 29#include "util/symbol.h" 30#include "util/thread.h" 31#include "util/thread_map.h" 32#include "util/top.h" 33#include "util/util.h" 34/* ANDROID_CHANGE_BEGIN */ 35#if 0 36#include <linux/rbtree.h> 37#else 38#include "util/include/linux/rbtree.h" 39#endif 40/* ANDROID_CHANGE_END */ 41#include "util/parse-options.h" 42#include "util/parse-events.h" 43#include "util/cpumap.h" 44#include "util/xyarray.h" 45 46#include "util/debug.h" 47 48#include <assert.h> 49#include <fcntl.h> 50 51#include <stdio.h> 52#include <termios.h> 53#include <unistd.h> 54#include <inttypes.h> 55 56#include <errno.h> 57#include <time.h> 58#include <sched.h> 59 60#include <sys/syscall.h> 61#include <sys/ioctl.h> 62#include <sys/poll.h> 63/* ANDROID_CHANGE_BEGIN */ 64#ifndef __APPLE__ 65#include <sys/prctl.h> 66#endif 67/* ANDROID_CHANGE_END */ 68#include <sys/wait.h> 69#include <sys/uio.h> 70#include <sys/mman.h> 71 72/* ANDROID_CHANGE_BEGIN */ 73#ifndef __APPLE__ 74/* Suppress kernel-name space pollution in <linux/types.h> below */ 75#include <features.h> 76#include <linux/unistd.h> 77#include <linux/types.h> 78#else 79#include "util/include/linux/types.h" 80#endif 81/* ANDROID_CHANGE_END */ 82 83static struct perf_top top = { 84 .count_filter = 5, 85 .delay_secs = 2, 86 .display_weighted = -1, 87 .target_pid = -1, 88 .target_tid = -1, 89 .active_symbols = LIST_HEAD_INIT(top.active_symbols), 90 .active_symbols_lock = PTHREAD_MUTEX_INITIALIZER, 91 .active_symbols_cond = PTHREAD_COND_INITIALIZER, 92 .freq = 1000, /* 1 KHz */ 93}; 94 95static bool system_wide = false; 96 97static bool use_tui, use_stdio; 98 99static int default_interval = 0; 100 101static bool kptr_restrict_warned; 102static bool vmlinux_warned; 103static bool inherit = false; 104static int realtime_prio = 0; 105static bool group = false; 106static unsigned int page_size; 107static unsigned int mmap_pages = 128; 108 109static bool dump_symtab = false; 110 111static struct winsize winsize; 112 113static const char *sym_filter = NULL; 114struct sym_entry *sym_filter_entry_sched = NULL; 115static int sym_pcnt_filter = 5; 116 117/* 118 * Source functions 119 */ 120 121void get_term_dimensions(struct winsize *ws) 122{ 123 char *s = getenv("LINES"); 124 125 if (s != NULL) { 126 ws->ws_row = atoi(s); 127 s = getenv("COLUMNS"); 128 if (s != NULL) { 129 ws->ws_col = atoi(s); 130 if (ws->ws_row && ws->ws_col) 131 return; 132 } 133 } 134#ifdef TIOCGWINSZ 135 if (ioctl(1, TIOCGWINSZ, ws) == 0 && 136 ws->ws_row && ws->ws_col) 137 return; 138#endif 139 ws->ws_row = 25; 140 ws->ws_col = 80; 141} 142 143static void update_print_entries(struct winsize *ws) 144{ 145 top.print_entries = ws->ws_row; 146 147 if (top.print_entries > 9) 148 top.print_entries -= 9; 149} 150 151static void sig_winch_handler(int sig __used) 152{ 153 get_term_dimensions(&winsize); 154 update_print_entries(&winsize); 155} 156 157static int parse_source(struct sym_entry *syme) 158{ 159 struct symbol *sym; 160 struct annotation *notes; 161 struct map *map; 162 int err = -1; 163 164 if (!syme) 165 return -1; 166 167 sym = sym_entry__symbol(syme); 168 map = syme->map; 169 170 /* 171 * We can't annotate with just /proc/kallsyms 172 */ 173 if (map->dso->symtab_type == SYMTAB__KALLSYMS) { 174 pr_err("Can't annotate %s: No vmlinux file was found in the " 175 "path\n", sym->name); 176 sleep(1); 177 return -1; 178 } 179 180 notes = symbol__annotation(sym); 181 if (notes->src != NULL) { 182 pthread_mutex_lock(¬es->lock); 183 goto out_assign; 184 } 185 186 pthread_mutex_lock(¬es->lock); 187 188 if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) { 189 pthread_mutex_unlock(¬es->lock); 190 pr_err("Not enough memory for annotating '%s' symbol!\n", 191 sym->name); 192 sleep(1); 193 return err; 194 } 195 196 /* ANDROID_CHANGE_BEGIN */ 197#if 0 198 err = symbol__annotate(sym, syme->map, 0); 199#else 200 err = symbol__annotate(sym, syme->map, 0, false); 201#endif 202 /* ANDROID_CHANGE_END */ 203 if (err == 0) { 204out_assign: 205 top.sym_filter_entry = syme; 206 } 207 208 pthread_mutex_unlock(¬es->lock); 209 return err; 210} 211 212static void __zero_source_counters(struct sym_entry *syme) 213{ 214 struct symbol *sym = sym_entry__symbol(syme); 215 symbol__annotate_zero_histograms(sym); 216} 217 218static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip) 219{ 220 struct annotation *notes; 221 struct symbol *sym; 222 223 if (syme != top.sym_filter_entry) 224 return; 225 226 sym = sym_entry__symbol(syme); 227 notes = symbol__annotation(sym); 228 229 if (pthread_mutex_trylock(¬es->lock)) 230 return; 231 232 ip = syme->map->map_ip(syme->map, ip); 233 symbol__inc_addr_samples(sym, syme->map, counter, ip); 234 235 pthread_mutex_unlock(¬es->lock); 236} 237 238static void show_details(struct sym_entry *syme) 239{ 240 struct annotation *notes; 241 struct symbol *symbol; 242 int more; 243 244 if (!syme) 245 return; 246 247 symbol = sym_entry__symbol(syme); 248 notes = symbol__annotation(symbol); 249 250 pthread_mutex_lock(¬es->lock); 251 252 if (notes->src == NULL) 253 goto out_unlock; 254 255 printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name); 256 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter); 257 258 more = symbol__annotate_printf(symbol, syme->map, top.sym_evsel->idx, 259 0, sym_pcnt_filter, top.print_entries, 4); 260 if (top.zero) 261 symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx); 262 else 263 symbol__annotate_decay_histogram(symbol, top.sym_evsel->idx); 264 if (more != 0) 265 printf("%d lines not displayed, maybe increase display entries [e]\n", more); 266out_unlock: 267 pthread_mutex_unlock(¬es->lock); 268} 269 270static const char CONSOLE_CLEAR[] = "[H[2J"; 271 272static void __list_insert_active_sym(struct sym_entry *syme) 273{ 274 list_add(&syme->node, &top.active_symbols); 275} 276 277static void print_sym_table(struct perf_session *session) 278{ 279 char bf[160]; 280 int printed = 0; 281 struct rb_node *nd; 282 struct sym_entry *syme; 283 struct rb_root tmp = RB_ROOT; 284 const int win_width = winsize.ws_col - 1; 285 int sym_width, dso_width, dso_short_width; 286 float sum_ksamples = perf_top__decay_samples(&top, &tmp); 287 288 puts(CONSOLE_CLEAR); 289 290 perf_top__header_snprintf(&top, bf, sizeof(bf)); 291 printf("%s\n", bf); 292 293 perf_top__reset_sample_counters(&top); 294 295 printf("%-*.*s\n", win_width, win_width, graph_dotted_line); 296 297 if (session->hists.stats.total_lost != 0) { 298 color_fprintf(stdout, PERF_COLOR_RED, "WARNING:"); 299 printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n", 300 session->hists.stats.total_lost); 301 } 302 303 if (top.sym_filter_entry) { 304 show_details(top.sym_filter_entry); 305 return; 306 } 307 308 perf_top__find_widths(&top, &tmp, &dso_width, &dso_short_width, 309 &sym_width); 310 311 if (sym_width + dso_width > winsize.ws_col - 29) { 312 dso_width = dso_short_width; 313 if (sym_width + dso_width > winsize.ws_col - 29) 314 sym_width = winsize.ws_col - dso_width - 29; 315 } 316 putchar('\n'); 317 if (top.evlist->nr_entries == 1) 318 printf(" samples pcnt"); 319 else 320 printf(" weight samples pcnt"); 321 322 if (verbose) 323 printf(" RIP "); 324 printf(" %-*.*s DSO\n", sym_width, sym_width, "function"); 325 printf(" %s _______ _____", 326 top.evlist->nr_entries == 1 ? " " : "______"); 327 if (verbose) 328 printf(" ________________"); 329 printf(" %-*.*s", sym_width, sym_width, graph_line); 330 printf(" %-*.*s", dso_width, dso_width, graph_line); 331 puts("\n"); 332 333 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) { 334 struct symbol *sym; 335 double pcnt; 336 337 syme = rb_entry(nd, struct sym_entry, rb_node); 338 sym = sym_entry__symbol(syme); 339 if (++printed > top.print_entries || 340 (int)syme->snap_count < top.count_filter) 341 continue; 342 343 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) / 344 sum_ksamples)); 345 346 if (top.evlist->nr_entries == 1 || !top.display_weighted) 347 printf("%20.2f ", syme->weight); 348 else 349 printf("%9.1f %10ld ", syme->weight, syme->snap_count); 350 351 percent_color_fprintf(stdout, "%4.1f%%", pcnt); 352 if (verbose) 353 printf(" %016" PRIx64, sym->start); 354 printf(" %-*.*s", sym_width, sym_width, sym->name); 355 printf(" %-*.*s\n", dso_width, dso_width, 356 dso_width >= syme->map->dso->long_name_len ? 357 syme->map->dso->long_name : 358 syme->map->dso->short_name); 359 } 360} 361 362static void prompt_integer(int *target, const char *msg) 363{ 364 char *buf = malloc(0), *p; 365 size_t dummy = 0; 366 int tmp; 367 368 fprintf(stdout, "\n%s: ", msg); 369 if (getline(&buf, &dummy, stdin) < 0) 370 return; 371 372 p = strchr(buf, '\n'); 373 if (p) 374 *p = 0; 375 376 p = buf; 377 while(*p) { 378 if (!isdigit(*p)) 379 goto out_free; 380 p++; 381 } 382 tmp = strtoul(buf, NULL, 10); 383 *target = tmp; 384out_free: 385 free(buf); 386} 387 388static void prompt_percent(int *target, const char *msg) 389{ 390 int tmp = 0; 391 392 prompt_integer(&tmp, msg); 393 if (tmp >= 0 && tmp <= 100) 394 *target = tmp; 395} 396 397static void prompt_symbol(struct sym_entry **target, const char *msg) 398{ 399 char *buf = malloc(0), *p; 400 struct sym_entry *syme = *target, *n, *found = NULL; 401 size_t dummy = 0; 402 403 /* zero counters of active symbol */ 404 if (syme) { 405 __zero_source_counters(syme); 406 *target = NULL; 407 } 408 409 fprintf(stdout, "\n%s: ", msg); 410 if (getline(&buf, &dummy, stdin) < 0) 411 goto out_free; 412 413 p = strchr(buf, '\n'); 414 if (p) 415 *p = 0; 416 417 pthread_mutex_lock(&top.active_symbols_lock); 418 syme = list_entry(top.active_symbols.next, struct sym_entry, node); 419 pthread_mutex_unlock(&top.active_symbols_lock); 420 421 list_for_each_entry_safe_from(syme, n, &top.active_symbols, node) { 422 struct symbol *sym = sym_entry__symbol(syme); 423 424 if (!strcmp(buf, sym->name)) { 425 found = syme; 426 break; 427 } 428 } 429 430 if (!found) { 431 fprintf(stderr, "Sorry, %s is not active.\n", buf); 432 sleep(1); 433 return; 434 } else 435 parse_source(found); 436 437out_free: 438 free(buf); 439} 440 441static void print_mapped_keys(void) 442{ 443 char *name = NULL; 444 445 if (top.sym_filter_entry) { 446 struct symbol *sym = sym_entry__symbol(top.sym_filter_entry); 447 name = sym->name; 448 } 449 450 fprintf(stdout, "\nMapped keys:\n"); 451 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top.delay_secs); 452 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top.print_entries); 453 454 if (top.evlist->nr_entries > 1) 455 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top.sym_evsel)); 456 457 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top.count_filter); 458 459 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter); 460 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); 461 fprintf(stdout, "\t[S] stop annotation.\n"); 462 463 if (top.evlist->nr_entries > 1) 464 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", top.display_weighted ? 1 : 0); 465 466 fprintf(stdout, 467 "\t[K] hide kernel_symbols symbols. \t(%s)\n", 468 top.hide_kernel_symbols ? "yes" : "no"); 469 fprintf(stdout, 470 "\t[U] hide user symbols. \t(%s)\n", 471 top.hide_user_symbols ? "yes" : "no"); 472 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top.zero ? 1 : 0); 473 fprintf(stdout, "\t[qQ] quit.\n"); 474} 475 476static int key_mapped(int c) 477{ 478 switch (c) { 479 case 'd': 480 case 'e': 481 case 'f': 482 case 'z': 483 case 'q': 484 case 'Q': 485 case 'K': 486 case 'U': 487 case 'F': 488 case 's': 489 case 'S': 490 return 1; 491 case 'E': 492 case 'w': 493 return top.evlist->nr_entries > 1 ? 1 : 0; 494 default: 495 break; 496 } 497 498 return 0; 499} 500 501static void handle_keypress(struct perf_session *session, int c) 502{ 503 if (!key_mapped(c)) { 504 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 505 struct termios tc, save; 506 507 print_mapped_keys(); 508 fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); 509 fflush(stdout); 510 511 tcgetattr(0, &save); 512 tc = save; 513 tc.c_lflag &= ~(ICANON | ECHO); 514 tc.c_cc[VMIN] = 0; 515 tc.c_cc[VTIME] = 0; 516 tcsetattr(0, TCSANOW, &tc); 517 518 poll(&stdin_poll, 1, -1); 519 c = getc(stdin); 520 521 tcsetattr(0, TCSAFLUSH, &save); 522 if (!key_mapped(c)) 523 return; 524 } 525 526 switch (c) { 527 case 'd': 528 prompt_integer(&top.delay_secs, "Enter display delay"); 529 if (top.delay_secs < 1) 530 top.delay_secs = 1; 531 break; 532 case 'e': 533 prompt_integer(&top.print_entries, "Enter display entries (lines)"); 534 if (top.print_entries == 0) { 535 sig_winch_handler(SIGWINCH); 536 signal(SIGWINCH, sig_winch_handler); 537 } else 538 signal(SIGWINCH, SIG_DFL); 539 break; 540 case 'E': 541 if (top.evlist->nr_entries > 1) { 542 /* Select 0 as the default event: */ 543 int counter = 0; 544 545 fprintf(stderr, "\nAvailable events:"); 546 547 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node) 548 fprintf(stderr, "\n\t%d %s", top.sym_evsel->idx, event_name(top.sym_evsel)); 549 550 prompt_integer(&counter, "Enter details event counter"); 551 552 if (counter >= top.evlist->nr_entries) { 553 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node); 554 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top.sym_evsel)); 555 sleep(1); 556 break; 557 } 558 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node) 559 if (top.sym_evsel->idx == counter) 560 break; 561 } else 562 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node); 563 break; 564 case 'f': 565 prompt_integer(&top.count_filter, "Enter display event count filter"); 566 break; 567 case 'F': 568 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)"); 569 break; 570 case 'K': 571 top.hide_kernel_symbols = !top.hide_kernel_symbols; 572 break; 573 case 'q': 574 case 'Q': 575 printf("exiting.\n"); 576 if (dump_symtab) 577 perf_session__fprintf_dsos(session, stderr); 578 exit(0); 579 case 's': 580 prompt_symbol(&top.sym_filter_entry, "Enter details symbol"); 581 break; 582 case 'S': 583 if (!top.sym_filter_entry) 584 break; 585 else { 586 struct sym_entry *syme = top.sym_filter_entry; 587 588 top.sym_filter_entry = NULL; 589 __zero_source_counters(syme); 590 } 591 break; 592 case 'U': 593 top.hide_user_symbols = !top.hide_user_symbols; 594 break; 595 case 'w': 596 top.display_weighted = ~top.display_weighted; 597 break; 598 case 'z': 599 top.zero = !top.zero; 600 break; 601 default: 602 break; 603 } 604} 605 606static void *display_thread_tui(void *arg __used) 607{ 608 int err = 0; 609 pthread_mutex_lock(&top.active_symbols_lock); 610 while (list_empty(&top.active_symbols)) { 611 err = pthread_cond_wait(&top.active_symbols_cond, 612 &top.active_symbols_lock); 613 if (err) 614 break; 615 } 616 pthread_mutex_unlock(&top.active_symbols_lock); 617 if (!err) 618 perf_top__tui_browser(&top); 619 exit_browser(0); 620 exit(0); 621 return NULL; 622} 623 624static void *display_thread(void *arg __used) 625{ 626 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; 627 struct termios tc, save; 628 int delay_msecs, c; 629 struct perf_session *session = (struct perf_session *) arg; 630 631 tcgetattr(0, &save); 632 tc = save; 633 tc.c_lflag &= ~(ICANON | ECHO); 634 tc.c_cc[VMIN] = 0; 635 tc.c_cc[VTIME] = 0; 636 637repeat: 638 delay_msecs = top.delay_secs * 1000; 639 tcsetattr(0, TCSANOW, &tc); 640 /* trash return*/ 641 getc(stdin); 642 643 do { 644 print_sym_table(session); 645 } while (!poll(&stdin_poll, 1, delay_msecs) == 1); 646 647 c = getc(stdin); 648 tcsetattr(0, TCSAFLUSH, &save); 649 650 handle_keypress(session, c); 651 goto repeat; 652 653 return NULL; 654} 655 656/* Tag samples to be skipped. */ 657static const char *skip_symbols[] = { 658 "default_idle", 659 "native_safe_halt", 660 "cpu_idle", 661 "enter_idle", 662 "exit_idle", 663 "mwait_idle", 664 "mwait_idle_with_hints", 665 "poll_idle", 666 "ppc64_runlatch_off", 667 "pseries_dedicated_idle_sleep", 668 NULL 669}; 670 671static int symbol_filter(struct map *map, struct symbol *sym) 672{ 673 struct sym_entry *syme; 674 const char *name = sym->name; 675 int i; 676 677 /* 678 * ppc64 uses function descriptors and appends a '.' to the 679 * start of every instruction address. Remove it. 680 */ 681 if (name[0] == '.') 682 name++; 683 684 if (!strcmp(name, "_text") || 685 !strcmp(name, "_etext") || 686 !strcmp(name, "_sinittext") || 687 !strncmp("init_module", name, 11) || 688 !strncmp("cleanup_module", name, 14) || 689 strstr(name, "_text_start") || 690 strstr(name, "_text_end")) 691 return 1; 692 693 syme = symbol__priv(sym); 694 syme->map = map; 695 symbol__annotate_init(map, sym); 696 697 if (!top.sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) { 698 /* schedule initial sym_filter_entry setup */ 699 sym_filter_entry_sched = syme; 700 sym_filter = NULL; 701 } 702 703 for (i = 0; skip_symbols[i]; i++) { 704 if (!strcmp(skip_symbols[i], name)) { 705 sym->ignore = true; 706 break; 707 } 708 } 709 710 return 0; 711} 712 713static void perf_event__process_sample(const union perf_event *event, 714 struct perf_sample *sample, 715 struct perf_session *session) 716{ 717 u64 ip = event->ip.ip; 718 struct sym_entry *syme; 719 struct addr_location al; 720 struct machine *machine; 721 u8 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 722 723 ++top.samples; 724 725 switch (origin) { 726 case PERF_RECORD_MISC_USER: 727 ++top.us_samples; 728 if (top.hide_user_symbols) 729 return; 730 machine = perf_session__find_host_machine(session); 731 break; 732 case PERF_RECORD_MISC_KERNEL: 733 ++top.kernel_samples; 734 if (top.hide_kernel_symbols) 735 return; 736 machine = perf_session__find_host_machine(session); 737 break; 738 case PERF_RECORD_MISC_GUEST_KERNEL: 739 ++top.guest_kernel_samples; 740 machine = perf_session__find_machine(session, event->ip.pid); 741 break; 742 case PERF_RECORD_MISC_GUEST_USER: 743 ++top.guest_us_samples; 744 /* 745 * TODO: we don't process guest user from host side 746 * except simple counting. 747 */ 748 return; 749 default: 750 return; 751 } 752 753 if (!machine && perf_guest) { 754 pr_err("Can't find guest [%d]'s kernel information\n", 755 event->ip.pid); 756 return; 757 } 758 759 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP) 760 top.exact_samples++; 761 762 if (perf_event__preprocess_sample(event, session, &al, sample, 763 symbol_filter) < 0 || 764 al.filtered) 765 return; 766 767 if (!kptr_restrict_warned && 768 symbol_conf.kptr_restrict && 769 al.cpumode == PERF_RECORD_MISC_KERNEL) { 770 ui__warning( 771"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" 772"Check /proc/sys/kernel/kptr_restrict.\n\n" 773"Kernel%s samples will not be resolved.\n", 774 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ? 775 " modules" : ""); 776 if (use_browser <= 0) 777 sleep(5); 778 kptr_restrict_warned = true; 779 } 780 781 if (al.sym == NULL) { 782 const char *msg = "Kernel samples will not be resolved.\n"; 783 /* 784 * As we do lazy loading of symtabs we only will know if the 785 * specified vmlinux file is invalid when we actually have a 786 * hit in kernel space and then try to load it. So if we get 787 * here and there are _no_ symbols in the DSO backing the 788 * kernel map, bail out. 789 * 790 * We may never get here, for instance, if we use -K/ 791 * --hide-kernel-symbols, even if the user specifies an 792 * invalid --vmlinux ;-) 793 */ 794 if (!kptr_restrict_warned && !vmlinux_warned && 795 al.map == machine->vmlinux_maps[MAP__FUNCTION] && 796 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) { 797 if (symbol_conf.vmlinux_name) { 798 ui__warning("The %s file can't be used.\n%s", 799 symbol_conf.vmlinux_name, msg); 800 } else { 801 ui__warning("A vmlinux file was not found.\n%s", 802 msg); 803 } 804 805 if (use_browser <= 0) 806 sleep(5); 807 vmlinux_warned = true; 808 } 809 810 return; 811 } 812 813 /* let's see, whether we need to install initial sym_filter_entry */ 814 if (sym_filter_entry_sched) { 815 top.sym_filter_entry = sym_filter_entry_sched; 816 sym_filter_entry_sched = NULL; 817 if (parse_source(top.sym_filter_entry) < 0) { 818 struct symbol *sym = sym_entry__symbol(top.sym_filter_entry); 819 820 pr_err("Can't annotate %s", sym->name); 821 if (top.sym_filter_entry->map->dso->symtab_type == SYMTAB__KALLSYMS) { 822 pr_err(": No vmlinux file was found in the path:\n"); 823 machine__fprintf_vmlinux_path(machine, stderr); 824 } else 825 pr_err(".\n"); 826 exit(1); 827 } 828 } 829 830 syme = symbol__priv(al.sym); 831 if (!al.sym->ignore) { 832 struct perf_evsel *evsel; 833 834 evsel = perf_evlist__id2evsel(top.evlist, sample->id); 835 assert(evsel != NULL); 836 syme->count[evsel->idx]++; 837 record_precise_ip(syme, evsel->idx, ip); 838 pthread_mutex_lock(&top.active_symbols_lock); 839 if (list_empty(&syme->node) || !syme->node.next) { 840 static bool first = true; 841 __list_insert_active_sym(syme); 842 if (first) { 843 pthread_cond_broadcast(&top.active_symbols_cond); 844 first = false; 845 } 846 } 847 pthread_mutex_unlock(&top.active_symbols_lock); 848 } 849} 850 851static void perf_session__mmap_read_idx(struct perf_session *self, int idx) 852{ 853 struct perf_sample sample; 854 union perf_event *event; 855 int ret; 856 857 while ((event = perf_evlist__mmap_read(top.evlist, idx)) != NULL) { 858 ret = perf_session__parse_sample(self, event, &sample); 859 if (ret) { 860 pr_err("Can't parse sample, err = %d\n", ret); 861 continue; 862 } 863 864 if (event->header.type == PERF_RECORD_SAMPLE) 865 perf_event__process_sample(event, &sample, self); 866 else 867 perf_event__process(event, &sample, self); 868 } 869} 870 871static void perf_session__mmap_read(struct perf_session *self) 872{ 873 int i; 874 875 for (i = 0; i < top.evlist->nr_mmaps; i++) 876 perf_session__mmap_read_idx(self, i); 877} 878 879static void start_counters(struct perf_evlist *evlist) 880{ 881 struct perf_evsel *counter; 882 883 list_for_each_entry(counter, &evlist->entries, node) { 884 struct perf_event_attr *attr = &counter->attr; 885 886 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; 887 888 if (top.freq) { 889 attr->sample_type |= PERF_SAMPLE_PERIOD; 890 attr->freq = 1; 891 attr->sample_freq = top.freq; 892 } 893 894 if (evlist->nr_entries > 1) { 895 attr->sample_type |= PERF_SAMPLE_ID; 896 attr->read_format |= PERF_FORMAT_ID; 897 } 898 899 attr->mmap = 1; 900 attr->inherit = inherit; 901try_again: 902 if (perf_evsel__open(counter, top.evlist->cpus, 903 top.evlist->threads, group) < 0) { 904 int err = errno; 905 906 if (err == EPERM || err == EACCES) { 907 ui__warning_paranoid(); 908 goto out_err; 909 } 910 /* 911 * If it's cycles then fall back to hrtimer 912 * based cpu-clock-tick sw counter, which 913 * is always available even if no PMU support: 914 */ 915 if (attr->type == PERF_TYPE_HARDWARE && 916 attr->config == PERF_COUNT_HW_CPU_CYCLES) { 917 if (verbose) 918 ui__warning("Cycles event not supported,\n" 919 "trying to fall back to cpu-clock-ticks\n"); 920 921 attr->type = PERF_TYPE_SOFTWARE; 922 attr->config = PERF_COUNT_SW_CPU_CLOCK; 923 goto try_again; 924 } 925 926 if (err == ENOENT) { 927 ui__warning("The %s event is not supported.\n", 928 event_name(counter)); 929 goto out_err; 930 } 931 932 ui__warning("The sys_perf_event_open() syscall " 933 "returned with %d (%s). /bin/dmesg " 934 "may provide additional information.\n" 935 "No CONFIG_PERF_EVENTS=y kernel support " 936 "configured?\n", err, strerror(err)); 937 goto out_err; 938 } 939 } 940 941 if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) { 942 ui__warning("Failed to mmap with %d (%s)\n", 943 errno, strerror(errno)); 944 goto out_err; 945 } 946 947 return; 948 949out_err: 950 exit_browser(0); 951 exit(0); 952} 953 954static int __cmd_top(void) 955{ 956 /* ANDROID_CHANGE_BEGIN */ 957#ifndef __APPLE__ 958 pthread_t thread; 959 int ret __used; 960 /* 961 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this 962 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now. 963 */ 964 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL); 965 if (session == NULL) 966 return -ENOMEM; 967 968 if (top.target_tid != -1) 969 perf_event__synthesize_thread_map(top.evlist->threads, 970 perf_event__process, session); 971 else 972 perf_event__synthesize_threads(perf_event__process, session); 973 974 start_counters(top.evlist); 975 session->evlist = top.evlist; 976 perf_session__update_sample_type(session); 977 978 /* Wait for a minimal set of events before starting the snapshot */ 979 poll(top.evlist->pollfd, top.evlist->nr_fds, 100); 980 981 perf_session__mmap_read(session); 982 983 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui : 984 display_thread), session)) { 985 printf("Could not create display thread.\n"); 986 exit(-1); 987 } 988 989 if (realtime_prio) { 990 struct sched_param param; 991 992 param.sched_priority = realtime_prio; 993 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { 994 printf("Could not set realtime priority.\n"); 995 exit(-1); 996 } 997 } 998 999 while (1) { 1000 u64 hits = top.samples; 1001 1002 perf_session__mmap_read(session); 1003 1004 if (hits == top.samples) 1005 ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100); 1006 } 1007 1008 return 0; 1009#else 1010 return -1; 1011#endif 1012 /* ANDROID_CHANGE_END */ 1013} 1014 1015static const char * const top_usage[] = { 1016 "perf top [<options>]", 1017 NULL 1018}; 1019 1020static const struct option options[] = { 1021 OPT_CALLBACK('e', "event", &top.evlist, "event", 1022 "event selector. use 'perf list' to list available events", 1023 parse_events), 1024 OPT_INTEGER('c', "count", &default_interval, 1025 "event period to sample"), 1026 OPT_INTEGER('p', "pid", &top.target_pid, 1027 "profile events on existing process id"), 1028 OPT_INTEGER('t', "tid", &top.target_tid, 1029 "profile events on existing thread id"), 1030 OPT_BOOLEAN('a', "all-cpus", &system_wide, 1031 "system-wide collection from all CPUs"), 1032 OPT_STRING('C', "cpu", &top.cpu_list, "cpu", 1033 "list of cpus to monitor"), 1034 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name, 1035 "file", "vmlinux pathname"), 1036 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols, 1037 "hide kernel symbols"), 1038 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"), 1039 OPT_INTEGER('r', "realtime", &realtime_prio, 1040 "collect data with this RT SCHED_FIFO priority"), 1041 OPT_INTEGER('d', "delay", &top.delay_secs, 1042 "number of seconds to delay between refreshes"), 1043 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, 1044 "dump the symbol table used for profiling"), 1045 OPT_INTEGER('f', "count-filter", &top.count_filter, 1046 "only display functions with more events than this"), 1047 OPT_BOOLEAN('g', "group", &group, 1048 "put the counters into a counter group"), 1049 OPT_BOOLEAN('i', "inherit", &inherit, 1050 "child tasks inherit counters"), 1051 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name", 1052 "symbol to annotate"), 1053 OPT_BOOLEAN('z', "zero", &top.zero, 1054 "zero history across updates"), 1055 OPT_INTEGER('F', "freq", &top.freq, 1056 "profile at this frequency"), 1057 OPT_INTEGER('E', "entries", &top.print_entries, 1058 "display this many functions"), 1059 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols, 1060 "hide user symbols"), 1061 OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"), 1062 OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"), 1063 OPT_INCR('v', "verbose", &verbose, 1064 "be more verbose (show counter open errors, etc)"), 1065 OPT_END() 1066}; 1067 1068int cmd_top(int argc, const char **argv, const char *prefix __used) 1069{ 1070 struct perf_evsel *pos; 1071 int status = -ENOMEM; 1072 1073 top.evlist = perf_evlist__new(NULL, NULL); 1074 if (top.evlist == NULL) 1075 return -ENOMEM; 1076 1077 page_size = sysconf(_SC_PAGE_SIZE); 1078 1079 argc = parse_options(argc, argv, options, top_usage, 0); 1080 if (argc) 1081 usage_with_options(top_usage, options); 1082 1083 /* 1084 * XXX For now start disabled, only using TUI if explicitely asked for. 1085 * Change that when handle_keys equivalent gets written, live annotation 1086 * done, etc. 1087 */ 1088 use_browser = 0; 1089 1090 if (use_stdio) 1091 use_browser = 0; 1092 else if (use_tui) 1093 use_browser = 1; 1094 1095 setup_browser(false); 1096 1097 /* CPU and PID are mutually exclusive */ 1098 if (top.target_tid > 0 && top.cpu_list) { 1099 printf("WARNING: PID switch overriding CPU\n"); 1100 sleep(1); 1101 top.cpu_list = NULL; 1102 } 1103 1104 if (top.target_pid != -1) 1105 top.target_tid = top.target_pid; 1106 1107 if (perf_evlist__create_maps(top.evlist, top.target_pid, 1108 top.target_tid, top.cpu_list) < 0) 1109 usage_with_options(top_usage, options); 1110 1111 if (!top.evlist->nr_entries && 1112 perf_evlist__add_default(top.evlist) < 0) { 1113 pr_err("Not enough memory for event selector list\n"); 1114 return -ENOMEM; 1115 } 1116 1117 if (top.delay_secs < 1) 1118 top.delay_secs = 1; 1119 1120 /* 1121 * User specified count overrides default frequency. 1122 */ 1123 if (default_interval) 1124 top.freq = 0; 1125 else if (top.freq) { 1126 default_interval = top.freq; 1127 } else { 1128 fprintf(stderr, "frequency and count are zero, aborting\n"); 1129 exit(EXIT_FAILURE); 1130 } 1131 1132 list_for_each_entry(pos, &top.evlist->entries, node) { 1133 if (perf_evsel__alloc_fd(pos, top.evlist->cpus->nr, 1134 top.evlist->threads->nr) < 0) 1135 goto out_free_fd; 1136 /* 1137 * Fill in the ones not specifically initialized via -c: 1138 */ 1139 if (pos->attr.sample_period) 1140 continue; 1141 1142 pos->attr.sample_period = default_interval; 1143 } 1144 1145 if (perf_evlist__alloc_pollfd(top.evlist) < 0 || 1146 perf_evlist__alloc_mmap(top.evlist) < 0) 1147 goto out_free_fd; 1148 1149 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node); 1150 1151 symbol_conf.priv_size = (sizeof(struct sym_entry) + sizeof(struct annotation) + 1152 (top.evlist->nr_entries + 1) * sizeof(unsigned long)); 1153 1154 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); 1155 if (symbol__init() < 0) 1156 return -1; 1157 1158 get_term_dimensions(&winsize); 1159 if (top.print_entries == 0) { 1160 update_print_entries(&winsize); 1161 signal(SIGWINCH, sig_winch_handler); 1162 } 1163 1164 status = __cmd_top(); 1165out_free_fd: 1166 perf_evlist__delete(top.evlist); 1167 1168 return status; 1169} 1170