1856 lines · c
1// SPDX-License-Identifier: GPL-2.0-only2/*3 * builtin-top.c4 *5 * Builtin top command: Display a continuously updated profile of6 * any workload, CPU or specific PID.7 *8 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>9 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>10 *11 * Improvements and fixes by:12 *13 * Arjan van de Ven <arjan@linux.intel.com>14 * Yanmin Zhang <yanmin.zhang@intel.com>15 * Wu Fengguang <fengguang.wu@intel.com>16 * Mike Galbraith <efault@gmx.de>17 * Paul Mackerras <paulus@samba.org>18 */19#include "builtin.h"20 21#include "perf.h"22 23#include "util/annotate.h"24#include "util/bpf-event.h"25#include "util/cgroup.h"26#include "util/config.h"27#include "util/color.h"28#include "util/dso.h"29#include "util/evlist.h"30#include "util/evsel.h"31#include "util/evsel_config.h"32#include "util/event.h"33#include "util/machine.h"34#include "util/map.h"35#include "util/mmap.h"36#include "util/session.h"37#include "util/thread.h"38#include "util/symbol.h"39#include "util/synthetic-events.h"40#include "util/top.h"41#include "util/util.h"42#include <linux/rbtree.h>43#include <subcmd/parse-options.h>44#include "util/parse-events.h"45#include "util/callchain.h"46#include "util/cpumap.h"47#include "util/sort.h"48#include "util/string2.h"49#include "util/term.h"50#include "util/intlist.h"51#include "util/parse-branch-options.h"52#include "arch/common.h"53#include "ui/ui.h"54 55#include "util/debug.h"56#include "util/ordered-events.h"57#include "util/pfm.h"58 59#include <assert.h>60#include <elf.h>61#include <fcntl.h>62 63#include <stdio.h>64#include <termios.h>65#include <unistd.h>66#include <inttypes.h>67 68#include <errno.h>69#include <time.h>70#include <sched.h>71#include <signal.h>72 73#include <sys/syscall.h>74#include <sys/ioctl.h>75#include <poll.h>76#include <sys/prctl.h>77#include <sys/wait.h>78#include <sys/uio.h>79#include <sys/utsname.h>80#include <sys/mman.h>81 82#include <linux/stringify.h>83#include <linux/time64.h>84#include <linux/types.h>85#include <linux/err.h>86 87#include <linux/ctype.h>88#include <perf/mmap.h>89 90static volatile sig_atomic_t done;91static volatile sig_atomic_t resize;92 93#define HEADER_LINE_NR 594 95static void perf_top__update_print_entries(struct perf_top *top)96{97 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;98}99 100static void winch_sig(int sig __maybe_unused)101{102 resize = 1;103}104 105static void perf_top__resize(struct perf_top *top)106{107 get_term_dimensions(&top->winsize);108 perf_top__update_print_entries(top);109}110 111static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)112{113 struct evsel *evsel;114 struct symbol *sym;115 struct annotation *notes;116 struct map *map;117 struct dso *dso;118 int err = -1;119 120 if (!he || !he->ms.sym)121 return -1;122 123 evsel = hists_to_evsel(he->hists);124 125 sym = he->ms.sym;126 map = he->ms.map;127 dso = map__dso(map);128 129 /*130 * We can't annotate with just /proc/kallsyms131 */132 if (dso__symtab_type(dso) == DSO_BINARY_TYPE__KALLSYMS && !dso__is_kcore(dso)) {133 pr_err("Can't annotate %s: No vmlinux file was found in the "134 "path\n", sym->name);135 sleep(1);136 return -1;137 }138 139 notes = symbol__annotation(sym);140 annotation__lock(notes);141 142 if (!symbol__hists(sym, top->evlist->core.nr_entries)) {143 annotation__unlock(notes);144 pr_err("Not enough memory for annotating '%s' symbol!\n",145 sym->name);146 sleep(1);147 return err;148 }149 150 err = symbol__annotate(&he->ms, evsel, NULL);151 if (err == 0) {152 top->sym_filter_entry = he;153 } else {154 char msg[BUFSIZ];155 symbol__strerror_disassemble(&he->ms, err, msg, sizeof(msg));156 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);157 }158 159 annotation__unlock(notes);160 return err;161}162 163static void __zero_source_counters(struct hist_entry *he)164{165 struct symbol *sym = he->ms.sym;166 symbol__annotate_zero_histograms(sym);167}168 169static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)170{171 struct utsname uts;172 int err = uname(&uts);173 struct dso *dso = map__dso(map);174 175 ui__warning("Out of bounds address found:\n\n"176 "Addr: %" PRIx64 "\n"177 "DSO: %s %c\n"178 "Map: %" PRIx64 "-%" PRIx64 "\n"179 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"180 "Arch: %s\n"181 "Kernel: %s\n"182 "Tools: %s\n\n"183 "Not all samples will be on the annotation output.\n\n"184 "Please report to linux-kernel@vger.kernel.org\n",185 ip, dso__long_name(dso), dso__symtab_origin(dso),186 map__start(map), map__end(map), sym->start, sym->end,187 sym->binding == STB_GLOBAL ? 'g' :188 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,189 err ? "[unknown]" : uts.machine,190 err ? "[unknown]" : uts.release, perf_version_string);191 if (use_browser <= 0)192 sleep(5);193 194 map__set_erange_warned(map);195}196 197static void perf_top__record_precise_ip(struct perf_top *top,198 struct hist_entry *he,199 struct perf_sample *sample,200 struct evsel *evsel, u64 ip)201 EXCLUSIVE_LOCKS_REQUIRED(he->hists->lock)202{203 struct annotation *notes;204 struct symbol *sym = he->ms.sym;205 int err = 0;206 207 if (sym == NULL || (use_browser == 0 &&208 (top->sym_filter_entry == NULL ||209 top->sym_filter_entry->ms.sym != sym)))210 return;211 212 notes = symbol__annotation(sym);213 214 if (!annotation__trylock(notes))215 return;216 217 err = hist_entry__inc_addr_samples(he, sample, evsel, ip);218 219 annotation__unlock(notes);220 221 if (unlikely(err)) {222 /*223 * This function is now called with he->hists->lock held.224 * Release it before going to sleep.225 */226 mutex_unlock(&he->hists->lock);227 228 if (err == -ERANGE && !map__erange_warned(he->ms.map))229 ui__warn_map_erange(he->ms.map, sym, ip);230 else if (err == -ENOMEM) {231 pr_err("Not enough memory for annotating '%s' symbol!\n",232 sym->name);233 sleep(1);234 }235 236 mutex_lock(&he->hists->lock);237 }238}239 240static void perf_top__show_details(struct perf_top *top)241{242 struct hist_entry *he = top->sym_filter_entry;243 struct evsel *evsel;244 struct annotation *notes;245 struct symbol *symbol;246 int more;247 248 if (!he)249 return;250 251 evsel = hists_to_evsel(he->hists);252 253 symbol = he->ms.sym;254 notes = symbol__annotation(symbol);255 256 annotation__lock(notes);257 258 symbol__calc_percent(symbol, evsel);259 260 if (notes->src == NULL)261 goto out_unlock;262 263 printf("Showing %s for %s\n", evsel__name(top->sym_evsel), symbol->name);264 printf(" Events Pcnt (>=%d%%)\n", annotate_opts.min_pcnt);265 266 more = symbol__annotate_printf(&he->ms, top->sym_evsel);267 268 if (top->evlist->enabled) {269 if (top->zero)270 symbol__annotate_zero_histogram(symbol, top->sym_evsel->core.idx);271 else272 symbol__annotate_decay_histogram(symbol, top->sym_evsel->core.idx);273 }274 if (more != 0)275 printf("%d lines not displayed, maybe increase display entries [e]\n", more);276out_unlock:277 annotation__unlock(notes);278}279 280static void perf_top__resort_hists(struct perf_top *t)281{282 struct evlist *evlist = t->evlist;283 struct evsel *pos;284 285 evlist__for_each_entry(evlist, pos) {286 struct hists *hists = evsel__hists(pos);287 288 /*289 * unlink existing entries so that they can be linked290 * in a correct order in hists__match() below.291 */292 hists__unlink(hists);293 294 if (evlist->enabled) {295 if (t->zero) {296 hists__delete_entries(hists);297 } else {298 hists__decay_entries(hists, t->hide_user_symbols,299 t->hide_kernel_symbols);300 }301 }302 303 hists__collapse_resort(hists, NULL);304 305 /* Non-group events are considered as leader */306 if (symbol_conf.event_group && !evsel__is_group_leader(pos)) {307 struct hists *leader_hists = evsel__hists(evsel__leader(pos));308 309 hists__match(leader_hists, hists);310 hists__link(leader_hists, hists);311 }312 }313 314 evlist__for_each_entry(evlist, pos) {315 evsel__output_resort(pos, NULL);316 }317}318 319static void perf_top__print_sym_table(struct perf_top *top)320{321 char bf[160];322 int printed = 0;323 const int win_width = top->winsize.ws_col - 1;324 struct evsel *evsel = top->sym_evsel;325 struct hists *hists = evsel__hists(evsel);326 327 puts(CONSOLE_CLEAR);328 329 perf_top__header_snprintf(top, bf, sizeof(bf));330 printf("%s\n", bf);331 332 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);333 334 if (!top->record_opts.overwrite &&335 (top->evlist->stats.nr_lost_warned !=336 top->evlist->stats.nr_events[PERF_RECORD_LOST])) {337 top->evlist->stats.nr_lost_warned =338 top->evlist->stats.nr_events[PERF_RECORD_LOST];339 color_fprintf(stdout, PERF_COLOR_RED,340 "WARNING: LOST %d chunks, Check IO/CPU overload",341 top->evlist->stats.nr_lost_warned);342 ++printed;343 }344 345 if (top->sym_filter_entry) {346 perf_top__show_details(top);347 return;348 }349 350 perf_top__resort_hists(top);351 352 hists__output_recalc_col_len(hists, top->print_entries - printed);353 putchar('\n');354 hists__fprintf(hists, false, top->print_entries - printed, win_width,355 top->min_percent, stdout, !symbol_conf.use_callchain);356}357 358static void prompt_integer(int *target, const char *msg)359{360 char *buf = NULL, *p;361 size_t dummy = 0;362 int tmp;363 364 fprintf(stdout, "\n%s: ", msg);365 if (getline(&buf, &dummy, stdin) < 0)366 return;367 368 p = strchr(buf, '\n');369 if (p)370 *p = 0;371 372 p = buf;373 while(*p) {374 if (!isdigit(*p))375 goto out_free;376 p++;377 }378 tmp = strtoul(buf, NULL, 10);379 *target = tmp;380out_free:381 free(buf);382}383 384static void prompt_percent(int *target, const char *msg)385{386 int tmp = 0;387 388 prompt_integer(&tmp, msg);389 if (tmp >= 0 && tmp <= 100)390 *target = tmp;391}392 393static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)394{395 char *buf = NULL, *p;396 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;397 struct hists *hists = evsel__hists(top->sym_evsel);398 struct rb_node *next;399 size_t dummy = 0;400 401 /* zero counters of active symbol */402 if (syme) {403 __zero_source_counters(syme);404 top->sym_filter_entry = NULL;405 }406 407 fprintf(stdout, "\n%s: ", msg);408 if (getline(&buf, &dummy, stdin) < 0)409 goto out_free;410 411 p = strchr(buf, '\n');412 if (p)413 *p = 0;414 415 next = rb_first_cached(&hists->entries);416 while (next) {417 n = rb_entry(next, struct hist_entry, rb_node);418 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {419 found = n;420 break;421 }422 next = rb_next(&n->rb_node);423 }424 425 if (!found) {426 fprintf(stderr, "Sorry, %s is not active.\n", buf);427 sleep(1);428 } else429 perf_top__parse_source(top, found);430 431out_free:432 free(buf);433}434 435static void perf_top__print_mapped_keys(struct perf_top *top)436{437 char *name = NULL;438 439 if (top->sym_filter_entry) {440 struct symbol *sym = top->sym_filter_entry->ms.sym;441 name = sym->name;442 }443 444 fprintf(stdout, "\nMapped keys:\n");445 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);446 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);447 448 if (top->evlist->core.nr_entries > 1)449 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", evsel__name(top->sym_evsel));450 451 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);452 453 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", annotate_opts.min_pcnt);454 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");455 fprintf(stdout, "\t[S] stop annotation.\n");456 457 fprintf(stdout,458 "\t[K] hide kernel symbols. \t(%s)\n",459 top->hide_kernel_symbols ? "yes" : "no");460 fprintf(stdout,461 "\t[U] hide user symbols. \t(%s)\n",462 top->hide_user_symbols ? "yes" : "no");463 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);464 fprintf(stdout, "\t[qQ] quit.\n");465}466 467static int perf_top__key_mapped(struct perf_top *top, int c)468{469 switch (c) {470 case 'd':471 case 'e':472 case 'f':473 case 'z':474 case 'q':475 case 'Q':476 case 'K':477 case 'U':478 case 'F':479 case 's':480 case 'S':481 return 1;482 case 'E':483 return top->evlist->core.nr_entries > 1 ? 1 : 0;484 default:485 break;486 }487 488 return 0;489}490 491static bool perf_top__handle_keypress(struct perf_top *top, int c)492{493 bool ret = true;494 495 if (!perf_top__key_mapped(top, c)) {496 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };497 struct termios save;498 499 perf_top__print_mapped_keys(top);500 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");501 fflush(stdout);502 503 set_term_quiet_input(&save);504 505 poll(&stdin_poll, 1, -1);506 c = getc(stdin);507 508 tcsetattr(0, TCSAFLUSH, &save);509 if (!perf_top__key_mapped(top, c))510 return ret;511 }512 513 switch (c) {514 case 'd':515 prompt_integer(&top->delay_secs, "Enter display delay");516 if (top->delay_secs < 1)517 top->delay_secs = 1;518 break;519 case 'e':520 prompt_integer(&top->print_entries, "Enter display entries (lines)");521 if (top->print_entries == 0) {522 perf_top__resize(top);523 signal(SIGWINCH, winch_sig);524 } else {525 signal(SIGWINCH, SIG_DFL);526 }527 break;528 case 'E':529 if (top->evlist->core.nr_entries > 1) {530 /* Select 0 as the default event: */531 int counter = 0;532 533 fprintf(stderr, "\nAvailable events:");534 535 evlist__for_each_entry(top->evlist, top->sym_evsel)536 fprintf(stderr, "\n\t%d %s", top->sym_evsel->core.idx, evsel__name(top->sym_evsel));537 538 prompt_integer(&counter, "Enter details event counter");539 540 if (counter >= top->evlist->core.nr_entries) {541 top->sym_evsel = evlist__first(top->evlist);542 fprintf(stderr, "Sorry, no such event, using %s.\n", evsel__name(top->sym_evsel));543 sleep(1);544 break;545 }546 evlist__for_each_entry(top->evlist, top->sym_evsel)547 if (top->sym_evsel->core.idx == counter)548 break;549 } else550 top->sym_evsel = evlist__first(top->evlist);551 break;552 case 'f':553 prompt_integer(&top->count_filter, "Enter display event count filter");554 break;555 case 'F':556 prompt_percent(&annotate_opts.min_pcnt,557 "Enter details display event filter (percent)");558 break;559 case 'K':560 top->hide_kernel_symbols = !top->hide_kernel_symbols;561 break;562 case 'q':563 case 'Q':564 printf("exiting.\n");565 if (top->dump_symtab)566 perf_session__fprintf_dsos(top->session, stderr);567 ret = false;568 break;569 case 's':570 perf_top__prompt_symbol(top, "Enter details symbol");571 break;572 case 'S':573 if (!top->sym_filter_entry)574 break;575 else {576 struct hist_entry *syme = top->sym_filter_entry;577 578 top->sym_filter_entry = NULL;579 __zero_source_counters(syme);580 }581 break;582 case 'U':583 top->hide_user_symbols = !top->hide_user_symbols;584 break;585 case 'z':586 top->zero = !top->zero;587 break;588 default:589 break;590 }591 592 return ret;593}594 595static void perf_top__sort_new_samples(void *arg)596{597 struct perf_top *t = arg;598 599 if (t->evlist->selected != NULL)600 t->sym_evsel = t->evlist->selected;601 602 perf_top__resort_hists(t);603 604 if (t->lost || t->drop)605 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n");606}607 608static void stop_top(void)609{610 session_done = 1;611 done = 1;612}613 614static void *display_thread_tui(void *arg)615{616 struct evsel *pos;617 struct perf_top *top = arg;618 const char *help = "For a higher level overview, try: perf top --sort comm,dso";619 struct hist_browser_timer hbt = {620 .timer = perf_top__sort_new_samples,621 .arg = top,622 .refresh = top->delay_secs,623 };624 int ret;625 626 /* In order to read symbols from other namespaces perf to needs to call627 * setns(2). This isn't permitted if the struct_fs has multiple users.628 * unshare(2) the fs so that we may continue to setns into namespaces629 * that we're observing.630 */631 unshare(CLONE_FS);632 633 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);634 635repeat:636 perf_top__sort_new_samples(top);637 638 /*639 * Initialize the uid_filter_str, in the future the TUI will allow640 * Zooming in/out UIDs. For now just use whatever the user passed641 * via --uid.642 */643 evlist__for_each_entry(top->evlist, pos) {644 struct hists *hists = evsel__hists(pos);645 hists->uid_filter_str = top->record_opts.target.uid_str;646 }647 648 ret = evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,649 &top->session->header.env, !top->record_opts.overwrite);650 if (ret == K_RELOAD) {651 top->zero = true;652 goto repeat;653 } else654 stop_top();655 656 return NULL;657}658 659static void display_sig(int sig __maybe_unused)660{661 stop_top();662}663 664static void display_setup_sig(void)665{666 signal(SIGSEGV, sighandler_dump_stack);667 signal(SIGFPE, sighandler_dump_stack);668 signal(SIGINT, display_sig);669 signal(SIGQUIT, display_sig);670 signal(SIGTERM, display_sig);671}672 673static void *display_thread(void *arg)674{675 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };676 struct termios save;677 struct perf_top *top = arg;678 int delay_msecs, c;679 680 /* In order to read symbols from other namespaces perf to needs to call681 * setns(2). This isn't permitted if the struct_fs has multiple users.682 * unshare(2) the fs so that we may continue to setns into namespaces683 * that we're observing.684 */685 unshare(CLONE_FS);686 687 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);688 689 display_setup_sig();690 pthread__unblock_sigwinch();691repeat:692 delay_msecs = top->delay_secs * MSEC_PER_SEC;693 set_term_quiet_input(&save);694 /* trash return*/695 clearerr(stdin);696 if (poll(&stdin_poll, 1, 0) > 0)697 getc(stdin);698 699 while (!done) {700 perf_top__print_sym_table(top);701 /*702 * Either timeout expired or we got an EINTR due to SIGWINCH,703 * refresh screen in both cases.704 */705 switch (poll(&stdin_poll, 1, delay_msecs)) {706 case 0:707 continue;708 case -1:709 if (errno == EINTR)710 continue;711 fallthrough;712 default:713 c = getc(stdin);714 tcsetattr(0, TCSAFLUSH, &save);715 716 if (perf_top__handle_keypress(top, c))717 goto repeat;718 stop_top();719 }720 }721 722 tcsetattr(0, TCSAFLUSH, &save);723 return NULL;724}725 726static int hist_iter__top_callback(struct hist_entry_iter *iter,727 struct addr_location *al, bool single,728 void *arg)729 EXCLUSIVE_LOCKS_REQUIRED(iter->he->hists->lock)730{731 struct perf_top *top = arg;732 struct evsel *evsel = iter->evsel;733 734 if (perf_hpp_list.sym && single)735 perf_top__record_precise_ip(top, iter->he, iter->sample, evsel, al->addr);736 737 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,738 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY),739 NULL, evsel);740 return 0;741}742 743static void perf_event__process_sample(const struct perf_tool *tool,744 const union perf_event *event,745 struct evsel *evsel,746 struct perf_sample *sample,747 struct machine *machine)748{749 struct perf_top *top = container_of(tool, struct perf_top, tool);750 struct addr_location al;751 752 if (!machine && perf_guest) {753 static struct intlist *seen;754 755 if (!seen)756 seen = intlist__new(NULL);757 758 if (!intlist__has_entry(seen, sample->pid)) {759 pr_err("Can't find guest [%d]'s kernel information\n",760 sample->pid);761 intlist__add(seen, sample->pid);762 }763 return;764 }765 766 if (!machine) {767 pr_err("%u unprocessable samples recorded.\r",768 top->session->evlist->stats.nr_unprocessable_samples++);769 return;770 }771 772 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)773 top->exact_samples++;774 775 addr_location__init(&al);776 if (machine__resolve(machine, &al, sample) < 0)777 goto out;778 779 if (top->stitch_lbr)780 thread__set_lbr_stitch_enable(al.thread, true);781 782 if (!machine->kptr_restrict_warned &&783 symbol_conf.kptr_restrict &&784 al.cpumode == PERF_RECORD_MISC_KERNEL) {785 if (!evlist__exclude_kernel(top->session->evlist)) {786 ui__warning(787"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"788"Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"789"Kernel%s samples will not be resolved.\n",790 al.map && map__has_symbols(al.map) ?791 " modules" : "");792 if (use_browser <= 0)793 sleep(5);794 }795 machine->kptr_restrict_warned = true;796 }797 798 if (al.sym == NULL && al.map != NULL) {799 const char *msg = "Kernel samples will not be resolved.\n";800 /*801 * As we do lazy loading of symtabs we only will know if the802 * specified vmlinux file is invalid when we actually have a803 * hit in kernel space and then try to load it. So if we get804 * here and there are _no_ symbols in the DSO backing the805 * kernel map, bail out.806 *807 * We may never get here, for instance, if we use -K/808 * --hide-kernel-symbols, even if the user specifies an809 * invalid --vmlinux ;-)810 */811 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&812 __map__is_kernel(al.map) && map__has_symbols(al.map)) {813 if (symbol_conf.vmlinux_name) {814 char serr[256];815 816 dso__strerror_load(map__dso(al.map), serr, sizeof(serr));817 ui__warning("The %s file can't be used: %s\n%s",818 symbol_conf.vmlinux_name, serr, msg);819 } else {820 ui__warning("A vmlinux file was not found.\n%s",821 msg);822 }823 824 if (use_browser <= 0)825 sleep(5);826 top->vmlinux_warned = true;827 }828 }829 830 if (al.sym == NULL || !al.sym->idle) {831 struct hists *hists = evsel__hists(evsel);832 struct hist_entry_iter iter = {833 .evsel = evsel,834 .sample = sample,835 .add_entry_cb = hist_iter__top_callback,836 };837 838 if (symbol_conf.cumulate_callchain)839 iter.ops = &hist_iter_cumulative;840 else841 iter.ops = &hist_iter_normal;842 843 mutex_lock(&hists->lock);844 845 if (hist_entry_iter__add(&iter, &al, top->max_stack, top) < 0)846 pr_err("Problem incrementing symbol period, skipping event\n");847 848 mutex_unlock(&hists->lock);849 }850 851out:852 addr_location__exit(&al);853}854 855static void856perf_top__process_lost(struct perf_top *top, union perf_event *event,857 struct evsel *evsel)858{859 top->lost += event->lost.lost;860 top->lost_total += event->lost.lost;861 evsel->evlist->stats.total_lost += event->lost.lost;862}863 864static void865perf_top__process_lost_samples(struct perf_top *top,866 union perf_event *event,867 struct evsel *evsel)868{869 top->lost += event->lost_samples.lost;870 top->lost_total += event->lost_samples.lost;871 evsel->evlist->stats.total_lost_samples += event->lost_samples.lost;872}873 874static u64 last_timestamp;875 876static void perf_top__mmap_read_idx(struct perf_top *top, int idx)877{878 struct record_opts *opts = &top->record_opts;879 struct evlist *evlist = top->evlist;880 struct mmap *md;881 union perf_event *event;882 883 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];884 if (perf_mmap__read_init(&md->core) < 0)885 return;886 887 while ((event = perf_mmap__read_event(&md->core)) != NULL) {888 int ret;889 890 ret = evlist__parse_sample_timestamp(evlist, event, &last_timestamp);891 if (ret && ret != -1)892 break;893 894 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0, NULL);895 if (ret)896 break;897 898 perf_mmap__consume(&md->core);899 900 if (top->qe.rotate) {901 mutex_lock(&top->qe.mutex);902 top->qe.rotate = false;903 cond_signal(&top->qe.cond);904 mutex_unlock(&top->qe.mutex);905 }906 }907 908 perf_mmap__read_done(&md->core);909}910 911static void perf_top__mmap_read(struct perf_top *top)912{913 bool overwrite = top->record_opts.overwrite;914 struct evlist *evlist = top->evlist;915 int i;916 917 if (overwrite)918 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);919 920 for (i = 0; i < top->evlist->core.nr_mmaps; i++)921 perf_top__mmap_read_idx(top, i);922 923 if (overwrite) {924 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);925 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);926 }927}928 929/*930 * Check per-event overwrite term.931 * perf top should support consistent term for all events.932 * - All events don't have per-event term933 * E.g. "cpu/cpu-cycles/,cpu/instructions/"934 * Nothing change, return 0.935 * - All events have same per-event term936 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/937 * Using the per-event setting to replace the opts->overwrite if938 * they are different, then return 0.939 * - Events have different per-event term940 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"941 * Return -1942 * - Some of the event set per-event term, but some not.943 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"944 * Return -1945 */946static int perf_top__overwrite_check(struct perf_top *top)947{948 struct record_opts *opts = &top->record_opts;949 struct evlist *evlist = top->evlist;950 struct evsel_config_term *term;951 struct list_head *config_terms;952 struct evsel *evsel;953 int set, overwrite = -1;954 955 evlist__for_each_entry(evlist, evsel) {956 set = -1;957 config_terms = &evsel->config_terms;958 list_for_each_entry(term, config_terms, list) {959 if (term->type == EVSEL__CONFIG_TERM_OVERWRITE)960 set = term->val.overwrite ? 1 : 0;961 }962 963 /* no term for current and previous event (likely) */964 if ((overwrite < 0) && (set < 0))965 continue;966 967 /* has term for both current and previous event, compare */968 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))969 return -1;970 971 /* no term for current event but has term for previous one */972 if ((overwrite >= 0) && (set < 0))973 return -1;974 975 /* has term for current event */976 if ((overwrite < 0) && (set >= 0)) {977 /* if it's first event, set overwrite */978 if (evsel == evlist__first(evlist))979 overwrite = set;980 else981 return -1;982 }983 }984 985 if ((overwrite >= 0) && (opts->overwrite != overwrite))986 opts->overwrite = overwrite;987 988 return 0;989}990 991static int perf_top_overwrite_fallback(struct perf_top *top,992 struct evsel *evsel)993{994 struct record_opts *opts = &top->record_opts;995 struct evlist *evlist = top->evlist;996 struct evsel *counter;997 998 if (!opts->overwrite)999 return 0;1000 1001 /* only fall back when first event fails */1002 if (evsel != evlist__first(evlist))1003 return 0;1004 1005 evlist__for_each_entry(evlist, counter)1006 counter->core.attr.write_backward = false;1007 opts->overwrite = false;1008 pr_debug2("fall back to non-overwrite mode\n");1009 return 1;1010}1011 1012static int perf_top__start_counters(struct perf_top *top)1013{1014 char msg[BUFSIZ];1015 struct evsel *counter;1016 struct evlist *evlist = top->evlist;1017 struct record_opts *opts = &top->record_opts;1018 1019 if (perf_top__overwrite_check(top)) {1020 ui__error("perf top only support consistent per-event "1021 "overwrite setting for all events\n");1022 goto out_err;1023 }1024 1025 evlist__config(evlist, opts, &callchain_param);1026 1027 evlist__for_each_entry(evlist, counter) {1028try_again:1029 if (evsel__open(counter, counter->core.cpus,1030 counter->core.threads) < 0) {1031 1032 /*1033 * Specially handle overwrite fall back.1034 * Because perf top is the only tool which has1035 * overwrite mode by default, support1036 * both overwrite and non-overwrite mode, and1037 * require consistent mode for all events.1038 *1039 * May move it to generic code with more tools1040 * have similar attribute.1041 */1042 if (perf_missing_features.write_backward &&1043 perf_top_overwrite_fallback(top, counter))1044 goto try_again;1045 1046 if (evsel__fallback(counter, &opts->target, errno, msg, sizeof(msg))) {1047 if (verbose > 0)1048 ui__warning("%s\n", msg);1049 goto try_again;1050 }1051 1052 evsel__open_strerror(counter, &opts->target, errno, msg, sizeof(msg));1053 ui__error("%s\n", msg);1054 goto out_err;1055 }1056 }1057 1058 if (evlist__apply_filters(evlist, &counter, &opts->target)) {1059 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",1060 counter->filter ?: "BPF", evsel__name(counter), errno,1061 str_error_r(errno, msg, sizeof(msg)));1062 goto out_err;1063 }1064 1065 if (evlist__mmap(evlist, opts->mmap_pages) < 0) {1066 ui__error("Failed to mmap with %d (%s)\n",1067 errno, str_error_r(errno, msg, sizeof(msg)));1068 goto out_err;1069 }1070 1071 return 0;1072 1073out_err:1074 return -1;1075}1076 1077static int callchain_param__setup_sample_type(struct callchain_param *callchain)1078{1079 if (callchain->mode != CHAIN_NONE) {1080 if (callchain_register_param(callchain) < 0) {1081 ui__error("Can't register callchain params.\n");1082 return -EINVAL;1083 }1084 }1085 1086 return 0;1087}1088 1089static struct ordered_events *rotate_queues(struct perf_top *top)1090{1091 struct ordered_events *in = top->qe.in;1092 1093 if (top->qe.in == &top->qe.data[1])1094 top->qe.in = &top->qe.data[0];1095 else1096 top->qe.in = &top->qe.data[1];1097 1098 return in;1099}1100 1101static void *process_thread(void *arg)1102{1103 struct perf_top *top = arg;1104 1105 while (!done) {1106 struct ordered_events *out, *in = top->qe.in;1107 1108 if (!in->nr_events) {1109 usleep(100);1110 continue;1111 }1112 1113 out = rotate_queues(top);1114 1115 mutex_lock(&top->qe.mutex);1116 top->qe.rotate = true;1117 cond_wait(&top->qe.cond, &top->qe.mutex);1118 mutex_unlock(&top->qe.mutex);1119 1120 if (ordered_events__flush(out, OE_FLUSH__TOP))1121 pr_err("failed to process events\n");1122 }1123 1124 return NULL;1125}1126 1127/*1128 * Allow only 'top->delay_secs' seconds behind samples.1129 */1130static int should_drop(struct ordered_event *qevent, struct perf_top *top)1131{1132 union perf_event *event = qevent->event;1133 u64 delay_timestamp;1134 1135 if (event->header.type != PERF_RECORD_SAMPLE)1136 return false;1137 1138 delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC;1139 return delay_timestamp < last_timestamp;1140}1141 1142static int deliver_event(struct ordered_events *qe,1143 struct ordered_event *qevent)1144{1145 struct perf_top *top = qe->data;1146 struct evlist *evlist = top->evlist;1147 struct perf_session *session = top->session;1148 union perf_event *event = qevent->event;1149 struct perf_sample sample;1150 struct evsel *evsel;1151 struct machine *machine;1152 int ret = -1;1153 1154 if (should_drop(qevent, top)) {1155 top->drop++;1156 top->drop_total++;1157 return 0;1158 }1159 1160 ret = evlist__parse_sample(evlist, event, &sample);1161 if (ret) {1162 pr_err("Can't parse sample, err = %d\n", ret);1163 goto next_event;1164 }1165 1166 evsel = evlist__id2evsel(session->evlist, sample.id);1167 assert(evsel != NULL);1168 1169 if (event->header.type == PERF_RECORD_SAMPLE) {1170 if (evswitch__discard(&top->evswitch, evsel))1171 return 0;1172 ++top->samples;1173 }1174 1175 switch (sample.cpumode) {1176 case PERF_RECORD_MISC_USER:1177 ++top->us_samples;1178 if (top->hide_user_symbols)1179 goto next_event;1180 machine = &session->machines.host;1181 break;1182 case PERF_RECORD_MISC_KERNEL:1183 ++top->kernel_samples;1184 if (top->hide_kernel_symbols)1185 goto next_event;1186 machine = &session->machines.host;1187 break;1188 case PERF_RECORD_MISC_GUEST_KERNEL:1189 ++top->guest_kernel_samples;1190 machine = perf_session__find_machine(session,1191 sample.pid);1192 break;1193 case PERF_RECORD_MISC_GUEST_USER:1194 ++top->guest_us_samples;1195 /*1196 * TODO: we don't process guest user from host side1197 * except simple counting.1198 */1199 goto next_event;1200 default:1201 if (event->header.type == PERF_RECORD_SAMPLE)1202 goto next_event;1203 machine = &session->machines.host;1204 break;1205 }1206 1207 if (event->header.type == PERF_RECORD_SAMPLE) {1208 perf_event__process_sample(&top->tool, event, evsel,1209 &sample, machine);1210 } else if (event->header.type == PERF_RECORD_LOST) {1211 perf_top__process_lost(top, event, evsel);1212 } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) {1213 perf_top__process_lost_samples(top, event, evsel);1214 } else if (event->header.type < PERF_RECORD_MAX) {1215 events_stats__inc(&session->evlist->stats, event->header.type);1216 machine__process_event(machine, event, &sample);1217 } else1218 ++session->evlist->stats.nr_unknown_events;1219 1220 ret = 0;1221next_event:1222 return ret;1223}1224 1225static void init_process_thread(struct perf_top *top)1226{1227 ordered_events__init(&top->qe.data[0], deliver_event, top);1228 ordered_events__init(&top->qe.data[1], deliver_event, top);1229 ordered_events__set_copy_on_queue(&top->qe.data[0], true);1230 ordered_events__set_copy_on_queue(&top->qe.data[1], true);1231 top->qe.in = &top->qe.data[0];1232 mutex_init(&top->qe.mutex);1233 cond_init(&top->qe.cond);1234}1235 1236static void exit_process_thread(struct perf_top *top)1237{1238 ordered_events__free(&top->qe.data[0]);1239 ordered_events__free(&top->qe.data[1]);1240 mutex_destroy(&top->qe.mutex);1241 cond_destroy(&top->qe.cond);1242}1243 1244static int __cmd_top(struct perf_top *top)1245{1246 struct record_opts *opts = &top->record_opts;1247 pthread_t thread, thread_process;1248 int ret;1249 1250 if (!annotate_opts.objdump_path) {1251 ret = perf_env__lookup_objdump(&top->session->header.env,1252 &annotate_opts.objdump_path);1253 if (ret)1254 return ret;1255 }1256 1257 ret = callchain_param__setup_sample_type(&callchain_param);1258 if (ret)1259 return ret;1260 1261 if (perf_session__register_idle_thread(top->session) < 0)1262 return ret;1263 1264 if (top->nr_threads_synthesize > 1)1265 perf_set_multithreaded();1266 1267 init_process_thread(top);1268 1269 if (opts->record_namespaces)1270 top->tool.namespace_events = true;1271 if (opts->record_cgroup) {1272#ifdef HAVE_FILE_HANDLE1273 top->tool.cgroup_events = true;1274#else1275 pr_err("cgroup tracking is not supported.\n");1276 return -1;1277#endif1278 }1279 1280 ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,1281 &top->session->machines.host,1282 &top->record_opts);1283 if (ret < 0)1284 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n");1285 1286 ret = perf_event__synthesize_cgroups(&top->tool, perf_event__process,1287 &top->session->machines.host);1288 if (ret < 0)1289 pr_debug("Couldn't synthesize cgroup events.\n");1290 1291 machine__synthesize_threads(&top->session->machines.host, &opts->target,1292 top->evlist->core.threads, true, false,1293 top->nr_threads_synthesize);1294 1295 perf_set_multithreaded();1296 1297 if (perf_hpp_list.socket) {1298 ret = perf_env__read_cpu_topology_map(&perf_env);1299 if (ret < 0) {1300 char errbuf[BUFSIZ];1301 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));1302 1303 ui__error("Could not read the CPU topology map: %s\n", err);1304 return ret;1305 }1306 }1307 1308 evlist__uniquify_name(top->evlist);1309 ret = perf_top__start_counters(top);1310 if (ret)1311 return ret;1312 1313 top->session->evlist = top->evlist;1314 perf_session__set_id_hdr_size(top->session);1315 1316 /*1317 * When perf is starting the traced process, all the events (apart from1318 * group members) have enable_on_exec=1 set, so don't spoil it by1319 * prematurely enabling them.1320 *1321 * XXX 'top' still doesn't start workloads like record, trace, but should,1322 * so leave the check here.1323 */1324 if (!target__none(&opts->target))1325 evlist__enable(top->evlist);1326 1327 ret = -1;1328 if (pthread_create(&thread_process, NULL, process_thread, top)) {1329 ui__error("Could not create process thread.\n");1330 return ret;1331 }1332 1333 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :1334 display_thread), top)) {1335 ui__error("Could not create display thread.\n");1336 goto out_join_thread;1337 }1338 1339 if (top->realtime_prio) {1340 struct sched_param param;1341 1342 param.sched_priority = top->realtime_prio;1343 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {1344 ui__error("Could not set realtime priority.\n");1345 goto out_join;1346 }1347 }1348 1349 /* Wait for a minimal set of events before starting the snapshot */1350 evlist__poll(top->evlist, 100);1351 1352 perf_top__mmap_read(top);1353 1354 while (!done) {1355 u64 hits = top->samples;1356 1357 perf_top__mmap_read(top);1358 1359 if (opts->overwrite || (hits == top->samples))1360 ret = evlist__poll(top->evlist, 100);1361 1362 if (resize) {1363 perf_top__resize(top);1364 resize = 0;1365 }1366 }1367 1368 ret = 0;1369out_join:1370 pthread_join(thread, NULL);1371out_join_thread:1372 cond_signal(&top->qe.cond);1373 pthread_join(thread_process, NULL);1374 perf_set_singlethreaded();1375 exit_process_thread(top);1376 return ret;1377}1378 1379static int1380callchain_opt(const struct option *opt, const char *arg, int unset)1381{1382 symbol_conf.use_callchain = true;1383 return record_callchain_opt(opt, arg, unset);1384}1385 1386static int1387parse_callchain_opt(const struct option *opt, const char *arg, int unset)1388{1389 struct callchain_param *callchain = opt->value;1390 1391 callchain->enabled = !unset;1392 callchain->record_mode = CALLCHAIN_FP;1393 1394 /*1395 * --no-call-graph1396 */1397 if (unset) {1398 symbol_conf.use_callchain = false;1399 callchain->record_mode = CALLCHAIN_NONE;1400 return 0;1401 }1402 1403 return parse_callchain_top_opt(arg);1404}1405 1406static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)1407{1408 if (!strcmp(var, "top.call-graph")) {1409 var = "call-graph.record-mode";1410 return perf_default_config(var, value, cb);1411 }1412 if (!strcmp(var, "top.children")) {1413 symbol_conf.cumulate_callchain = perf_config_bool(var, value);1414 return 0;1415 }1416 1417 return 0;1418}1419 1420static int1421parse_percent_limit(const struct option *opt, const char *arg,1422 int unset __maybe_unused)1423{1424 struct perf_top *top = opt->value;1425 1426 top->min_percent = strtof(arg, NULL);1427 return 0;1428}1429 1430const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP1431 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";1432 1433int cmd_top(int argc, const char **argv)1434{1435 char errbuf[BUFSIZ];1436 struct perf_top top = {1437 .count_filter = 5,1438 .delay_secs = 2,1439 .record_opts = {1440 .mmap_pages = UINT_MAX,1441 .user_freq = UINT_MAX,1442 .user_interval = ULLONG_MAX,1443 .freq = 4000, /* 4 KHz */1444 .target = {1445 .uses_mmap = true,1446 },1447 /*1448 * FIXME: This will lose PERF_RECORD_MMAP and other metadata1449 * when we pause, fix that and reenable. Probably using a1450 * separate evlist with a dummy event, i.e. a non-overwrite1451 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE1452 * stays in overwrite mode. -acme1453 * */1454 .overwrite = 0,1455 .sample_time = true,1456 .sample_time_set = true,1457 },1458 .max_stack = sysctl__max_stack(),1459 .nr_threads_synthesize = UINT_MAX,1460 };1461 struct parse_events_option_args parse_events_option_args = {1462 .evlistp = &top.evlist,1463 };1464 bool branch_call_mode = false;1465 struct record_opts *opts = &top.record_opts;1466 struct target *target = &opts->target;1467 const char *disassembler_style = NULL, *objdump_path = NULL, *addr2line_path = NULL;1468 const struct option options[] = {1469 OPT_CALLBACK('e', "event", &parse_events_option_args, "event",1470 "event selector. use 'perf list' to list available events",1471 parse_events_option),1472 OPT_CALLBACK(0, "filter", &top.evlist, "filter",1473 "event filter", parse_filter),1474 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),1475 OPT_STRING('p', "pid", &target->pid, "pid",1476 "profile events on existing process id"),1477 OPT_STRING('t', "tid", &target->tid, "tid",1478 "profile events on existing thread id"),1479 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,1480 "system-wide collection from all CPUs"),1481 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",1482 "list of cpus to monitor"),1483 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,1484 "file", "vmlinux pathname"),1485 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,1486 "don't load vmlinux even if found"),1487 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,1488 "file", "kallsyms pathname"),1489 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,1490 "hide kernel symbols"),1491 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",1492 "number of mmap data pages", evlist__parse_mmap_pages),1493 OPT_INTEGER('r', "realtime", &top.realtime_prio,1494 "collect data with this RT SCHED_FIFO priority"),1495 OPT_INTEGER('d', "delay", &top.delay_secs,1496 "number of seconds to delay between refreshes"),1497 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,1498 "dump the symbol table used for profiling"),1499 OPT_INTEGER('f', "count-filter", &top.count_filter,1500 "only display functions with more events than this"),1501 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,1502 "child tasks do not inherit counters"),1503 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",1504 "symbol to annotate"),1505 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),1506 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",1507 "profile at this frequency",1508 record__parse_freq),1509 OPT_INTEGER('E', "entries", &top.print_entries,1510 "display this many functions"),1511 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,1512 "hide user symbols"),1513#ifdef HAVE_SLANG_SUPPORT1514 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),1515#endif1516 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),1517 OPT_INCR('v', "verbose", &verbose,1518 "be more verbose (show counter open errors, etc)"),1519 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",1520 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."1521 " Please refer the man page for the complete list."),1522 OPT_STRING(0, "fields", &field_order, "key[,keys...]",1523 "output field(s): overhead, period, sample plus all of sort keys"),1524 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,1525 "Show a column with the number of samples"),1526 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,1527 NULL, "enables call-graph recording and display",1528 &callchain_opt),1529 OPT_CALLBACK(0, "call-graph", &callchain_param,1530 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",1531 top_callchain_help, &parse_callchain_opt),1532 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,1533 "Accumulate callchains of children and show total overhead as well"),1534 OPT_INTEGER(0, "max-stack", &top.max_stack,1535 "Set the maximum stack depth when parsing the callchain. "1536 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),1537 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",1538 "ignore callees of these functions in call graphs",1539 report_parse_ignore_callees_opt),1540 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,1541 "Show a column with the sum of periods"),1542 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",1543 "only consider symbols in these dsos"),1544 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",1545 "only consider symbols in these comms"),1546 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",1547 "only consider these symbols"),1548 OPT_BOOLEAN(0, "source", &annotate_opts.annotate_src,1549 "Interleave source code with assembly code (default)"),1550 OPT_BOOLEAN(0, "asm-raw", &annotate_opts.show_asm_raw,1551 "Display raw encoding of assembly instructions (default)"),1552 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,1553 "Enable kernel symbol demangling"),1554 OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),1555 OPT_STRING(0, "objdump", &objdump_path, "path",1556 "objdump binary to use for disassembly and annotations"),1557 OPT_STRING(0, "addr2line", &addr2line_path, "path",1558 "addr2line binary to use for line numbers"),1559 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",1560 "Specify disassembler style (e.g. -M intel for intel syntax)"),1561 OPT_STRING(0, "prefix", &annotate_opts.prefix, "prefix",1562 "Add prefix to source file path names in programs (with --prefix-strip)"),1563 OPT_STRING(0, "prefix-strip", &annotate_opts.prefix_strip, "N",1564 "Strip first N entries of source file path name in programs (with --prefix)"),1565 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),1566 OPT_CALLBACK(0, "percent-limit", &top, "percent",1567 "Don't show entries under that percent", parse_percent_limit),1568 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",1569 "How to display percentage of filtered entries", parse_filter_percentage),1570 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,1571 "width[,width...]",1572 "don't try to adjust column width, use these fixed values"),1573 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,1574 "per thread proc mmap processing timeout in ms"),1575 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,1576 "branch any", "sample any taken branches",1577 parse_branch_stack),1578 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,1579 "branch filter mask", "branch stack filter modes",1580 parse_branch_stack),1581 OPT_BOOLEAN(0, "branch-history", &branch_call_mode,1582 "add last branch records to call history"),1583 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,1584 "Show raw trace event output (do not use print fmt or plugins)"),1585 OPT_BOOLEAN('H', "hierarchy", &symbol_conf.report_hierarchy,1586 "Show entries in a hierarchy"),1587 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,1588 "Use a backward ring buffer, default: no"),1589 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),1590 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,1591 "number of thread to run event synthesize"),1592 OPT_CALLBACK('G', "cgroup", &top.evlist, "name",1593 "monitor event in cgroup name only", parse_cgroups),1594 OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,1595 "Record namespaces events"),1596 OPT_BOOLEAN(0, "all-cgroups", &opts->record_cgroup,1597 "Record cgroup events"),1598 OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,1599 "Sort the output by the event at the index n in group. "1600 "If n is invalid, sort by the first event. "1601 "WARNING: should be used on grouped events."),1602 OPT_BOOLEAN(0, "stitch-lbr", &top.stitch_lbr,1603 "Enable LBR callgraph stitching approach"),1604#ifdef HAVE_LIBPFM1605 OPT_CALLBACK(0, "pfm-events", &top.evlist, "event",1606 "libpfm4 event selector. use 'perf list' to list available events",1607 parse_libpfm_events_option),1608#endif1609 OPTS_EVSWITCH(&top.evswitch),1610 OPT_END()1611 };1612 const char * const top_usage[] = {1613 "perf top [<options>]",1614 NULL1615 };1616 int status = hists__init();1617 1618 if (status < 0)1619 return status;1620 1621 annotation_options__init();1622 1623 annotate_opts.min_pcnt = 5;1624 annotate_opts.context = 4;1625 1626 top.evlist = evlist__new();1627 if (top.evlist == NULL)1628 return -ENOMEM;1629 1630 status = perf_config(perf_top_config, &top);1631 if (status)1632 return status;1633 /*1634 * Since the per arch annotation init routine may need the cpuid, read1635 * it here, since we are not getting this from the perf.data header.1636 */1637 status = perf_env__read_cpuid(&perf_env);1638 if (status) {1639 /*1640 * Some arches do not provide a get_cpuid(), so just use pr_debug, otherwise1641 * warn the user explicitly.1642 */1643 eprintf(status == ENOSYS ? 1 : 0, verbose,1644 "Couldn't read the cpuid for this machine: %s\n",1645 str_error_r(errno, errbuf, sizeof(errbuf)));1646 }1647 top.evlist->env = &perf_env;1648 1649 argc = parse_options(argc, argv, options, top_usage, 0);1650 if (argc)1651 usage_with_options(top_usage, options);1652 1653 if (disassembler_style) {1654 annotate_opts.disassembler_style = strdup(disassembler_style);1655 if (!annotate_opts.disassembler_style)1656 return -ENOMEM;1657 }1658 if (objdump_path) {1659 annotate_opts.objdump_path = strdup(objdump_path);1660 if (!annotate_opts.objdump_path)1661 return -ENOMEM;1662 }1663 if (addr2line_path) {1664 symbol_conf.addr2line_path = strdup(addr2line_path);1665 if (!symbol_conf.addr2line_path)1666 return -ENOMEM;1667 }1668 1669 status = symbol__validate_sym_arguments();1670 if (status)1671 goto out_delete_evlist;1672 1673 if (annotate_check_args() < 0)1674 goto out_delete_evlist;1675 1676 if (!top.evlist->core.nr_entries) {1677 bool can_profile_kernel = perf_event_paranoid_check(1);1678 int err = parse_event(top.evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu");1679 1680 if (err)1681 goto out_delete_evlist;1682 }1683 1684 status = evswitch__init(&top.evswitch, top.evlist, stderr);1685 if (status)1686 goto out_delete_evlist;1687 1688 if (symbol_conf.report_hierarchy) {1689 /* disable incompatible options */1690 symbol_conf.event_group = false;1691 symbol_conf.cumulate_callchain = false;1692 1693 if (field_order) {1694 pr_err("Error: --hierarchy and --fields options cannot be used together\n");1695 parse_options_usage(top_usage, options, "fields", 0);1696 parse_options_usage(NULL, options, "hierarchy", 0);1697 goto out_delete_evlist;1698 }1699 }1700 1701 if (top.stitch_lbr && !(callchain_param.record_mode == CALLCHAIN_LBR)) {1702 pr_err("Error: --stitch-lbr must be used with --call-graph lbr\n");1703 goto out_delete_evlist;1704 }1705 1706 if (nr_cgroups > 0 && opts->record_cgroup) {1707 pr_err("--cgroup and --all-cgroups cannot be used together\n");1708 goto out_delete_evlist;1709 }1710 1711 if (branch_call_mode) {1712 if (!opts->branch_stack)1713 opts->branch_stack = PERF_SAMPLE_BRANCH_ANY;1714 symbol_conf.use_callchain = true;1715 callchain_param.key = CCKEY_ADDRESS;1716 callchain_param.branch_callstack = true;1717 callchain_param.enabled = true;1718 if (callchain_param.record_mode == CALLCHAIN_NONE)1719 callchain_param.record_mode = CALLCHAIN_FP;1720 callchain_register_param(&callchain_param);1721 if (!sort_order)1722 sort_order = "srcline,symbol,dso";1723 }1724 1725 if (opts->branch_stack && callchain_param.enabled)1726 symbol_conf.show_branchflag_count = true;1727 1728 sort__mode = SORT_MODE__TOP;1729 /* display thread wants entries to be collapsed in a different tree */1730 perf_hpp_list.need_collapse = 1;1731 1732 if (top.use_stdio)1733 use_browser = 0;1734#ifdef HAVE_SLANG_SUPPORT1735 else if (top.use_tui)1736 use_browser = 1;1737#endif1738 1739 setup_browser(false);1740 1741 if (setup_sorting(top.evlist) < 0) {1742 if (sort_order)1743 parse_options_usage(top_usage, options, "s", 1);1744 if (field_order)1745 parse_options_usage(sort_order ? NULL : top_usage,1746 options, "fields", 0);1747 goto out_delete_evlist;1748 }1749 1750 status = target__validate(target);1751 if (status) {1752 target__strerror(target, status, errbuf, BUFSIZ);1753 ui__warning("%s\n", errbuf);1754 }1755 1756 status = target__parse_uid(target);1757 if (status) {1758 int saved_errno = errno;1759 1760 target__strerror(target, status, errbuf, BUFSIZ);1761 ui__error("%s\n", errbuf);1762 1763 status = -saved_errno;1764 goto out_delete_evlist;1765 }1766 1767 if (target__none(target))1768 target->system_wide = true;1769 1770 if (evlist__create_maps(top.evlist, target) < 0) {1771 ui__error("Couldn't create thread/CPU maps: %s\n",1772 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));1773 status = -errno;1774 goto out_delete_evlist;1775 }1776 1777 if (top.delay_secs < 1)1778 top.delay_secs = 1;1779 1780 if (record_opts__config(opts)) {1781 status = -EINVAL;1782 goto out_delete_evlist;1783 }1784 1785 top.sym_evsel = evlist__first(top.evlist);1786 1787 if (!callchain_param.enabled) {1788 symbol_conf.cumulate_callchain = false;1789 perf_hpp__cancel_cumulate();1790 }1791 1792 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)1793 callchain_param.order = ORDER_CALLER;1794 1795 status = symbol__annotation_init();1796 if (status < 0)1797 goto out_delete_evlist;1798 1799 annotation_config__init();1800 1801 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);1802 status = symbol__init(NULL);1803 if (status < 0)1804 goto out_delete_evlist;1805 1806 sort__setup_elide(stdout);1807 1808 get_term_dimensions(&top.winsize);1809 if (top.print_entries == 0) {1810 perf_top__update_print_entries(&top);1811 signal(SIGWINCH, winch_sig);1812 }1813 1814 top.session = perf_session__new(NULL, NULL);1815 if (IS_ERR(top.session)) {1816 status = PTR_ERR(top.session);1817 top.session = NULL;1818 goto out_delete_evlist;1819 }1820 1821#ifdef HAVE_LIBBPF_SUPPORT1822 if (!top.record_opts.no_bpf_event) {1823 top.sb_evlist = evlist__new();1824 1825 if (top.sb_evlist == NULL) {1826 pr_err("Couldn't create side band evlist.\n.");1827 status = -EINVAL;1828 goto out_delete_evlist;1829 }1830 1831 if (evlist__add_bpf_sb_event(top.sb_evlist, &perf_env)) {1832 pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");1833 status = -EINVAL;1834 goto out_delete_evlist;1835 }1836 }1837#endif1838 1839 if (evlist__start_sb_thread(top.sb_evlist, target)) {1840 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");1841 opts->no_bpf_event = true;1842 }1843 1844 status = __cmd_top(&top);1845 1846 if (!opts->no_bpf_event)1847 evlist__stop_sb_thread(top.sb_evlist);1848 1849out_delete_evlist:1850 evlist__delete(top.evlist);1851 perf_session__delete(top.session);1852 annotation_options__exit();1853 1854 return status;1855}1856