1 // SPDX-License-Identifier: GPL-2.0-only
5 * Builtin top command: Display a continuously updated profile of
6 * any workload, CPU or specific PID.
8 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
9 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
11 * Improvements and fixes by:
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>
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"
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"
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"
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"
55 #include "util/debug.h"
56 #include "util/ordered-events.h"
73 #include <sys/syscall.h>
74 #include <sys/ioctl.h>
76 #include <sys/prctl.h>
79 #include <sys/utsname.h>
82 #include <linux/stringify.h>
83 #include <linux/time64.h>
84 #include <linux/types.h>
85 #include <linux/err.h>
87 #include <linux/ctype.h>
88 #include <perf/mmap.h>
90 static volatile int done;
91 static volatile int resize;
93 #define HEADER_LINE_NR 5
95 static void perf_top__update_print_entries(struct perf_top *top)
97 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
100 static void winch_sig(int sig __maybe_unused)
105 static void perf_top__resize(struct perf_top *top)
107 get_term_dimensions(&top->winsize);
108 perf_top__update_print_entries(top);
111 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
115 struct annotation *notes;
119 if (!he || !he->ms.sym)
122 evsel = hists_to_evsel(he->hists);
128 * We can't annotate with just /proc/kallsyms
130 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
131 !dso__is_kcore(map->dso)) {
132 pr_err("Can't annotate %s: No vmlinux file was found in the "
133 "path\n", sym->name);
138 notes = symbol__annotation(sym);
139 pthread_mutex_lock(¬es->lock);
141 if (!symbol__hists(sym, top->evlist->core.nr_entries)) {
142 pthread_mutex_unlock(¬es->lock);
143 pr_err("Not enough memory for annotating '%s' symbol!\n",
149 err = symbol__annotate(&he->ms, evsel, &top->annotation_opts, NULL);
151 top->sym_filter_entry = he;
154 symbol__strerror_disassemble(&he->ms, err, msg, sizeof(msg));
155 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
158 pthread_mutex_unlock(¬es->lock);
162 static void __zero_source_counters(struct hist_entry *he)
164 struct symbol *sym = he->ms.sym;
165 symbol__annotate_zero_histograms(sym);
168 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
171 int err = uname(&uts);
173 ui__warning("Out of bounds address found:\n\n"
174 "Addr: %" PRIx64 "\n"
176 "Map: %" PRIx64 "-%" PRIx64 "\n"
177 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
181 "Not all samples will be on the annotation output.\n\n"
182 "Please report to linux-kernel@vger.kernel.org\n",
183 ip, map->dso->long_name, dso__symtab_origin(map->dso),
184 map->start, map->end, sym->start, sym->end,
185 sym->binding == STB_GLOBAL ? 'g' :
186 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
187 err ? "[unknown]" : uts.machine,
188 err ? "[unknown]" : uts.release, perf_version_string);
189 if (use_browser <= 0)
192 map->erange_warned = true;
195 static void perf_top__record_precise_ip(struct perf_top *top,
196 struct hist_entry *he,
197 struct perf_sample *sample,
198 struct evsel *evsel, u64 ip)
200 struct annotation *notes;
201 struct symbol *sym = he->ms.sym;
204 if (sym == NULL || (use_browser == 0 &&
205 (top->sym_filter_entry == NULL ||
206 top->sym_filter_entry->ms.sym != sym)))
209 notes = symbol__annotation(sym);
211 if (pthread_mutex_trylock(¬es->lock))
214 err = hist_entry__inc_addr_samples(he, sample, evsel, ip);
216 pthread_mutex_unlock(¬es->lock);
220 * This function is now called with he->hists->lock held.
221 * Release it before going to sleep.
223 pthread_mutex_unlock(&he->hists->lock);
225 if (err == -ERANGE && !he->ms.map->erange_warned)
226 ui__warn_map_erange(he->ms.map, sym, ip);
227 else if (err == -ENOMEM) {
228 pr_err("Not enough memory for annotating '%s' symbol!\n",
233 pthread_mutex_lock(&he->hists->lock);
237 static void perf_top__show_details(struct perf_top *top)
239 struct hist_entry *he = top->sym_filter_entry;
241 struct annotation *notes;
242 struct symbol *symbol;
248 evsel = hists_to_evsel(he->hists);
251 notes = symbol__annotation(symbol);
253 pthread_mutex_lock(¬es->lock);
255 symbol__calc_percent(symbol, evsel);
257 if (notes->src == NULL)
260 printf("Showing %s for %s\n", evsel__name(top->sym_evsel), symbol->name);
261 printf(" Events Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt);
263 more = symbol__annotate_printf(&he->ms, top->sym_evsel, &top->annotation_opts);
265 if (top->evlist->enabled) {
267 symbol__annotate_zero_histogram(symbol, top->sym_evsel->core.idx);
269 symbol__annotate_decay_histogram(symbol, top->sym_evsel->core.idx);
272 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
274 pthread_mutex_unlock(¬es->lock);
277 static void perf_top__resort_hists(struct perf_top *t)
279 struct evlist *evlist = t->evlist;
282 evlist__for_each_entry(evlist, pos) {
283 struct hists *hists = evsel__hists(pos);
286 * unlink existing entries so that they can be linked
287 * in a correct order in hists__match() below.
289 hists__unlink(hists);
291 if (evlist->enabled) {
293 hists__delete_entries(hists);
295 hists__decay_entries(hists, t->hide_user_symbols,
296 t->hide_kernel_symbols);
300 hists__collapse_resort(hists, NULL);
302 /* Non-group events are considered as leader */
303 if (symbol_conf.event_group && !evsel__is_group_leader(pos)) {
304 struct hists *leader_hists = evsel__hists(evsel__leader(pos));
306 hists__match(leader_hists, hists);
307 hists__link(leader_hists, hists);
311 evlist__for_each_entry(evlist, pos) {
312 evsel__output_resort(pos, NULL);
316 static void perf_top__print_sym_table(struct perf_top *top)
320 const int win_width = top->winsize.ws_col - 1;
321 struct evsel *evsel = top->sym_evsel;
322 struct hists *hists = evsel__hists(evsel);
326 perf_top__header_snprintf(top, bf, sizeof(bf));
329 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
331 if (!top->record_opts.overwrite &&
332 (top->evlist->stats.nr_lost_warned !=
333 top->evlist->stats.nr_events[PERF_RECORD_LOST])) {
334 top->evlist->stats.nr_lost_warned =
335 top->evlist->stats.nr_events[PERF_RECORD_LOST];
336 color_fprintf(stdout, PERF_COLOR_RED,
337 "WARNING: LOST %d chunks, Check IO/CPU overload",
338 top->evlist->stats.nr_lost_warned);
342 if (top->sym_filter_entry) {
343 perf_top__show_details(top);
347 perf_top__resort_hists(top);
349 hists__output_recalc_col_len(hists, top->print_entries - printed);
351 hists__fprintf(hists, false, top->print_entries - printed, win_width,
352 top->min_percent, stdout, !symbol_conf.use_callchain);
355 static void prompt_integer(int *target, const char *msg)
357 char *buf = malloc(0), *p;
361 fprintf(stdout, "\n%s: ", msg);
362 if (getline(&buf, &dummy, stdin) < 0)
365 p = strchr(buf, '\n');
375 tmp = strtoul(buf, NULL, 10);
381 static void prompt_percent(int *target, const char *msg)
385 prompt_integer(&tmp, msg);
386 if (tmp >= 0 && tmp <= 100)
390 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
392 char *buf = malloc(0), *p;
393 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
394 struct hists *hists = evsel__hists(top->sym_evsel);
395 struct rb_node *next;
398 /* zero counters of active symbol */
400 __zero_source_counters(syme);
401 top->sym_filter_entry = NULL;
404 fprintf(stdout, "\n%s: ", msg);
405 if (getline(&buf, &dummy, stdin) < 0)
408 p = strchr(buf, '\n');
412 next = rb_first_cached(&hists->entries);
414 n = rb_entry(next, struct hist_entry, rb_node);
415 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
419 next = rb_next(&n->rb_node);
423 fprintf(stderr, "Sorry, %s is not active.\n", buf);
426 perf_top__parse_source(top, found);
432 static void perf_top__print_mapped_keys(struct perf_top *top)
436 if (top->sym_filter_entry) {
437 struct symbol *sym = top->sym_filter_entry->ms.sym;
441 fprintf(stdout, "\nMapped keys:\n");
442 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
443 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
445 if (top->evlist->core.nr_entries > 1)
446 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", evsel__name(top->sym_evsel));
448 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
450 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt);
451 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
452 fprintf(stdout, "\t[S] stop annotation.\n");
455 "\t[K] hide kernel symbols. \t(%s)\n",
456 top->hide_kernel_symbols ? "yes" : "no");
458 "\t[U] hide user symbols. \t(%s)\n",
459 top->hide_user_symbols ? "yes" : "no");
460 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
461 fprintf(stdout, "\t[qQ] quit.\n");
464 static int perf_top__key_mapped(struct perf_top *top, int c)
480 return top->evlist->core.nr_entries > 1 ? 1 : 0;
488 static bool perf_top__handle_keypress(struct perf_top *top, int c)
492 if (!perf_top__key_mapped(top, c)) {
493 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
496 perf_top__print_mapped_keys(top);
497 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
500 set_term_quiet_input(&save);
502 poll(&stdin_poll, 1, -1);
505 tcsetattr(0, TCSAFLUSH, &save);
506 if (!perf_top__key_mapped(top, c))
512 prompt_integer(&top->delay_secs, "Enter display delay");
513 if (top->delay_secs < 1)
517 prompt_integer(&top->print_entries, "Enter display entries (lines)");
518 if (top->print_entries == 0) {
519 perf_top__resize(top);
520 signal(SIGWINCH, winch_sig);
522 signal(SIGWINCH, SIG_DFL);
526 if (top->evlist->core.nr_entries > 1) {
527 /* Select 0 as the default event: */
530 fprintf(stderr, "\nAvailable events:");
532 evlist__for_each_entry(top->evlist, top->sym_evsel)
533 fprintf(stderr, "\n\t%d %s", top->sym_evsel->core.idx, evsel__name(top->sym_evsel));
535 prompt_integer(&counter, "Enter details event counter");
537 if (counter >= top->evlist->core.nr_entries) {
538 top->sym_evsel = evlist__first(top->evlist);
539 fprintf(stderr, "Sorry, no such event, using %s.\n", evsel__name(top->sym_evsel));
543 evlist__for_each_entry(top->evlist, top->sym_evsel)
544 if (top->sym_evsel->core.idx == counter)
547 top->sym_evsel = evlist__first(top->evlist);
550 prompt_integer(&top->count_filter, "Enter display event count filter");
553 prompt_percent(&top->annotation_opts.min_pcnt,
554 "Enter details display event filter (percent)");
557 top->hide_kernel_symbols = !top->hide_kernel_symbols;
561 printf("exiting.\n");
562 if (top->dump_symtab)
563 perf_session__fprintf_dsos(top->session, stderr);
567 perf_top__prompt_symbol(top, "Enter details symbol");
570 if (!top->sym_filter_entry)
573 struct hist_entry *syme = top->sym_filter_entry;
575 top->sym_filter_entry = NULL;
576 __zero_source_counters(syme);
580 top->hide_user_symbols = !top->hide_user_symbols;
583 top->zero = !top->zero;
592 static void perf_top__sort_new_samples(void *arg)
594 struct perf_top *t = arg;
596 if (t->evlist->selected != NULL)
597 t->sym_evsel = t->evlist->selected;
599 perf_top__resort_hists(t);
601 if (t->lost || t->drop)
602 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n");
605 static void stop_top(void)
611 static void *display_thread_tui(void *arg)
614 struct perf_top *top = arg;
615 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
616 struct hist_browser_timer hbt = {
617 .timer = perf_top__sort_new_samples,
619 .refresh = top->delay_secs,
623 /* In order to read symbols from other namespaces perf to needs to call
624 * setns(2). This isn't permitted if the struct_fs has multiple users.
625 * unshare(2) the fs so that we may continue to setns into namespaces
626 * that we're observing.
630 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
633 perf_top__sort_new_samples(top);
636 * Initialize the uid_filter_str, in the future the TUI will allow
637 * Zooming in/out UIDs. For now just use whatever the user passed
640 evlist__for_each_entry(top->evlist, pos) {
641 struct hists *hists = evsel__hists(pos);
642 hists->uid_filter_str = top->record_opts.target.uid_str;
645 ret = evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
646 &top->session->header.env, !top->record_opts.overwrite,
647 &top->annotation_opts);
648 if (ret == K_RELOAD) {
657 static void display_sig(int sig __maybe_unused)
662 static void display_setup_sig(void)
664 signal(SIGSEGV, sighandler_dump_stack);
665 signal(SIGFPE, sighandler_dump_stack);
666 signal(SIGINT, display_sig);
667 signal(SIGQUIT, display_sig);
668 signal(SIGTERM, display_sig);
671 static void *display_thread(void *arg)
673 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
675 struct perf_top *top = arg;
678 /* In order to read symbols from other namespaces perf to needs to call
679 * setns(2). This isn't permitted if the struct_fs has multiple users.
680 * unshare(2) the fs so that we may continue to setns into namespaces
681 * that we're observing.
685 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
688 pthread__unblock_sigwinch();
690 delay_msecs = top->delay_secs * MSEC_PER_SEC;
691 set_term_quiet_input(&save);
694 if (poll(&stdin_poll, 1, 0) > 0)
698 perf_top__print_sym_table(top);
700 * Either timeout expired or we got an EINTR due to SIGWINCH,
701 * refresh screen in both cases.
703 switch (poll(&stdin_poll, 1, delay_msecs)) {
712 tcsetattr(0, TCSAFLUSH, &save);
714 if (perf_top__handle_keypress(top, c))
720 tcsetattr(0, TCSAFLUSH, &save);
724 static int hist_iter__top_callback(struct hist_entry_iter *iter,
725 struct addr_location *al, bool single,
728 struct perf_top *top = arg;
729 struct hist_entry *he = iter->he;
730 struct evsel *evsel = iter->evsel;
732 if (perf_hpp_list.sym && single)
733 perf_top__record_precise_ip(top, he, iter->sample, evsel, al->addr);
735 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
736 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY),
741 static void perf_event__process_sample(struct perf_tool *tool,
742 const union perf_event *event,
744 struct perf_sample *sample,
745 struct machine *machine)
747 struct perf_top *top = container_of(tool, struct perf_top, tool);
748 struct addr_location al;
750 if (!machine && perf_guest) {
751 static struct intlist *seen;
754 seen = intlist__new(NULL);
756 if (!intlist__has_entry(seen, sample->pid)) {
757 pr_err("Can't find guest [%d]'s kernel information\n",
759 intlist__add(seen, sample->pid);
765 pr_err("%u unprocessable samples recorded.\r",
766 top->session->evlist->stats.nr_unprocessable_samples++);
770 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
771 top->exact_samples++;
773 if (machine__resolve(machine, &al, sample) < 0)
777 al.thread->lbr_stitch_enable = true;
779 if (!machine->kptr_restrict_warned &&
780 symbol_conf.kptr_restrict &&
781 al.cpumode == PERF_RECORD_MISC_KERNEL) {
782 if (!evlist__exclude_kernel(top->session->evlist)) {
784 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
785 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
786 "Kernel%s samples will not be resolved.\n",
787 al.map && map__has_symbols(al.map) ?
789 if (use_browser <= 0)
792 machine->kptr_restrict_warned = true;
795 if (al.sym == NULL && al.map != NULL) {
796 const char *msg = "Kernel samples will not be resolved.\n";
798 * As we do lazy loading of symtabs we only will know if the
799 * specified vmlinux file is invalid when we actually have a
800 * hit in kernel space and then try to load it. So if we get
801 * here and there are _no_ symbols in the DSO backing the
802 * kernel map, bail out.
804 * We may never get here, for instance, if we use -K/
805 * --hide-kernel-symbols, even if the user specifies an
806 * invalid --vmlinux ;-)
808 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
809 __map__is_kernel(al.map) && map__has_symbols(al.map)) {
810 if (symbol_conf.vmlinux_name) {
812 dso__strerror_load(al.map->dso, serr, sizeof(serr));
813 ui__warning("The %s file can't be used: %s\n%s",
814 symbol_conf.vmlinux_name, serr, msg);
816 ui__warning("A vmlinux file was not found.\n%s",
820 if (use_browser <= 0)
822 top->vmlinux_warned = true;
826 if (al.sym == NULL || !al.sym->idle) {
827 struct hists *hists = evsel__hists(evsel);
828 struct hist_entry_iter iter = {
831 .add_entry_cb = hist_iter__top_callback,
834 if (symbol_conf.cumulate_callchain)
835 iter.ops = &hist_iter_cumulative;
837 iter.ops = &hist_iter_normal;
839 pthread_mutex_lock(&hists->lock);
841 if (hist_entry_iter__add(&iter, &al, top->max_stack, top) < 0)
842 pr_err("Problem incrementing symbol period, skipping event\n");
844 pthread_mutex_unlock(&hists->lock);
847 addr_location__put(&al);
851 perf_top__process_lost(struct perf_top *top, union perf_event *event,
854 top->lost += event->lost.lost;
855 top->lost_total += event->lost.lost;
856 evsel->evlist->stats.total_lost += event->lost.lost;
860 perf_top__process_lost_samples(struct perf_top *top,
861 union perf_event *event,
864 top->lost += event->lost_samples.lost;
865 top->lost_total += event->lost_samples.lost;
866 evsel->evlist->stats.total_lost_samples += event->lost_samples.lost;
869 static u64 last_timestamp;
871 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
873 struct record_opts *opts = &top->record_opts;
874 struct evlist *evlist = top->evlist;
876 union perf_event *event;
878 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
879 if (perf_mmap__read_init(&md->core) < 0)
882 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
885 ret = evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
886 if (ret && ret != -1)
889 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0, NULL);
893 perf_mmap__consume(&md->core);
895 if (top->qe.rotate) {
896 pthread_mutex_lock(&top->qe.mutex);
897 top->qe.rotate = false;
898 pthread_cond_signal(&top->qe.cond);
899 pthread_mutex_unlock(&top->qe.mutex);
903 perf_mmap__read_done(&md->core);
906 static void perf_top__mmap_read(struct perf_top *top)
908 bool overwrite = top->record_opts.overwrite;
909 struct evlist *evlist = top->evlist;
913 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
915 for (i = 0; i < top->evlist->core.nr_mmaps; i++)
916 perf_top__mmap_read_idx(top, i);
919 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
920 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
925 * Check per-event overwrite term.
926 * perf top should support consistent term for all events.
927 * - All events don't have per-event term
928 * E.g. "cpu/cpu-cycles/,cpu/instructions/"
929 * Nothing change, return 0.
930 * - All events have same per-event term
931 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
932 * Using the per-event setting to replace the opts->overwrite if
933 * they are different, then return 0.
934 * - Events have different per-event term
935 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
937 * - Some of the event set per-event term, but some not.
938 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
941 static int perf_top__overwrite_check(struct perf_top *top)
943 struct record_opts *opts = &top->record_opts;
944 struct evlist *evlist = top->evlist;
945 struct evsel_config_term *term;
946 struct list_head *config_terms;
948 int set, overwrite = -1;
950 evlist__for_each_entry(evlist, evsel) {
952 config_terms = &evsel->config_terms;
953 list_for_each_entry(term, config_terms, list) {
954 if (term->type == EVSEL__CONFIG_TERM_OVERWRITE)
955 set = term->val.overwrite ? 1 : 0;
958 /* no term for current and previous event (likely) */
959 if ((overwrite < 0) && (set < 0))
962 /* has term for both current and previous event, compare */
963 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
966 /* no term for current event but has term for previous one */
967 if ((overwrite >= 0) && (set < 0))
970 /* has term for current event */
971 if ((overwrite < 0) && (set >= 0)) {
972 /* if it's first event, set overwrite */
973 if (evsel == evlist__first(evlist))
980 if ((overwrite >= 0) && (opts->overwrite != overwrite))
981 opts->overwrite = overwrite;
986 static int perf_top_overwrite_fallback(struct perf_top *top,
989 struct record_opts *opts = &top->record_opts;
990 struct evlist *evlist = top->evlist;
991 struct evsel *counter;
993 if (!opts->overwrite)
996 /* only fall back when first event fails */
997 if (evsel != evlist__first(evlist))
1000 evlist__for_each_entry(evlist, counter)
1001 counter->core.attr.write_backward = false;
1002 opts->overwrite = false;
1003 pr_debug2("fall back to non-overwrite mode\n");
1007 static int perf_top__start_counters(struct perf_top *top)
1010 struct evsel *counter;
1011 struct evlist *evlist = top->evlist;
1012 struct record_opts *opts = &top->record_opts;
1014 if (perf_top__overwrite_check(top)) {
1015 ui__error("perf top only support consistent per-event "
1016 "overwrite setting for all events\n");
1020 evlist__config(evlist, opts, &callchain_param);
1022 evlist__for_each_entry(evlist, counter) {
1024 if (evsel__open(counter, top->evlist->core.user_requested_cpus,
1025 top->evlist->core.threads) < 0) {
1028 * Specially handle overwrite fall back.
1029 * Because perf top is the only tool which has
1030 * overwrite mode by default, support
1031 * both overwrite and non-overwrite mode, and
1032 * require consistent mode for all events.
1034 * May move it to generic code with more tools
1035 * have similar attribute.
1037 if (perf_missing_features.write_backward &&
1038 perf_top_overwrite_fallback(top, counter))
1041 if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
1043 ui__warning("%s\n", msg);
1047 evsel__open_strerror(counter, &opts->target, errno, msg, sizeof(msg));
1048 ui__error("%s\n", msg);
1053 if (evlist__mmap(evlist, opts->mmap_pages) < 0) {
1054 ui__error("Failed to mmap with %d (%s)\n",
1055 errno, str_error_r(errno, msg, sizeof(msg)));
1065 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
1067 if (callchain->mode != CHAIN_NONE) {
1068 if (callchain_register_param(callchain) < 0) {
1069 ui__error("Can't register callchain params.\n");
1077 static struct ordered_events *rotate_queues(struct perf_top *top)
1079 struct ordered_events *in = top->qe.in;
1081 if (top->qe.in == &top->qe.data[1])
1082 top->qe.in = &top->qe.data[0];
1084 top->qe.in = &top->qe.data[1];
1089 static void *process_thread(void *arg)
1091 struct perf_top *top = arg;
1094 struct ordered_events *out, *in = top->qe.in;
1096 if (!in->nr_events) {
1101 out = rotate_queues(top);
1103 pthread_mutex_lock(&top->qe.mutex);
1104 top->qe.rotate = true;
1105 pthread_cond_wait(&top->qe.cond, &top->qe.mutex);
1106 pthread_mutex_unlock(&top->qe.mutex);
1108 if (ordered_events__flush(out, OE_FLUSH__TOP))
1109 pr_err("failed to process events\n");
1116 * Allow only 'top->delay_secs' seconds behind samples.
1118 static int should_drop(struct ordered_event *qevent, struct perf_top *top)
1120 union perf_event *event = qevent->event;
1121 u64 delay_timestamp;
1123 if (event->header.type != PERF_RECORD_SAMPLE)
1126 delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC;
1127 return delay_timestamp < last_timestamp;
1130 static int deliver_event(struct ordered_events *qe,
1131 struct ordered_event *qevent)
1133 struct perf_top *top = qe->data;
1134 struct evlist *evlist = top->evlist;
1135 struct perf_session *session = top->session;
1136 union perf_event *event = qevent->event;
1137 struct perf_sample sample;
1138 struct evsel *evsel;
1139 struct machine *machine;
1142 if (should_drop(qevent, top)) {
1148 ret = evlist__parse_sample(evlist, event, &sample);
1150 pr_err("Can't parse sample, err = %d\n", ret);
1154 evsel = evlist__id2evsel(session->evlist, sample.id);
1155 assert(evsel != NULL);
1157 if (event->header.type == PERF_RECORD_SAMPLE) {
1158 if (evswitch__discard(&top->evswitch, evsel))
1163 switch (sample.cpumode) {
1164 case PERF_RECORD_MISC_USER:
1166 if (top->hide_user_symbols)
1168 machine = &session->machines.host;
1170 case PERF_RECORD_MISC_KERNEL:
1171 ++top->kernel_samples;
1172 if (top->hide_kernel_symbols)
1174 machine = &session->machines.host;
1176 case PERF_RECORD_MISC_GUEST_KERNEL:
1177 ++top->guest_kernel_samples;
1178 machine = perf_session__find_machine(session,
1181 case PERF_RECORD_MISC_GUEST_USER:
1182 ++top->guest_us_samples;
1184 * TODO: we don't process guest user from host side
1185 * except simple counting.
1189 if (event->header.type == PERF_RECORD_SAMPLE)
1191 machine = &session->machines.host;
1195 if (event->header.type == PERF_RECORD_SAMPLE) {
1196 perf_event__process_sample(&top->tool, event, evsel,
1198 } else if (event->header.type == PERF_RECORD_LOST) {
1199 perf_top__process_lost(top, event, evsel);
1200 } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) {
1201 perf_top__process_lost_samples(top, event, evsel);
1202 } else if (event->header.type < PERF_RECORD_MAX) {
1203 events_stats__inc(&session->evlist->stats, event->header.type);
1204 machine__process_event(machine, event, &sample);
1206 ++session->evlist->stats.nr_unknown_events;
1213 static void init_process_thread(struct perf_top *top)
1215 ordered_events__init(&top->qe.data[0], deliver_event, top);
1216 ordered_events__init(&top->qe.data[1], deliver_event, top);
1217 ordered_events__set_copy_on_queue(&top->qe.data[0], true);
1218 ordered_events__set_copy_on_queue(&top->qe.data[1], true);
1219 top->qe.in = &top->qe.data[0];
1220 pthread_mutex_init(&top->qe.mutex, NULL);
1221 pthread_cond_init(&top->qe.cond, NULL);
1224 static int __cmd_top(struct perf_top *top)
1226 struct record_opts *opts = &top->record_opts;
1227 pthread_t thread, thread_process;
1230 if (!top->annotation_opts.objdump_path) {
1231 ret = perf_env__lookup_objdump(&top->session->header.env,
1232 &top->annotation_opts.objdump_path);
1237 ret = callchain_param__setup_sample_type(&callchain_param);
1241 if (perf_session__register_idle_thread(top->session) < 0)
1244 if (top->nr_threads_synthesize > 1)
1245 perf_set_multithreaded();
1247 init_process_thread(top);
1249 if (opts->record_namespaces)
1250 top->tool.namespace_events = true;
1251 if (opts->record_cgroup) {
1252 #ifdef HAVE_FILE_HANDLE
1253 top->tool.cgroup_events = true;
1255 pr_err("cgroup tracking is not supported.\n");
1260 ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
1261 &top->session->machines.host,
1264 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n");
1266 ret = perf_event__synthesize_cgroups(&top->tool, perf_event__process,
1267 &top->session->machines.host);
1269 pr_debug("Couldn't synthesize cgroup events.\n");
1271 machine__synthesize_threads(&top->session->machines.host, &opts->target,
1272 top->evlist->core.threads, true, false,
1273 top->nr_threads_synthesize);
1275 if (top->nr_threads_synthesize > 1)
1276 perf_set_singlethreaded();
1278 if (perf_hpp_list.socket) {
1279 ret = perf_env__read_cpu_topology_map(&perf_env);
1281 char errbuf[BUFSIZ];
1282 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1284 ui__error("Could not read the CPU topology map: %s\n", err);
1289 ret = perf_top__start_counters(top);
1293 top->session->evlist = top->evlist;
1294 perf_session__set_id_hdr_size(top->session);
1297 * When perf is starting the traced process, all the events (apart from
1298 * group members) have enable_on_exec=1 set, so don't spoil it by
1299 * prematurely enabling them.
1301 * XXX 'top' still doesn't start workloads like record, trace, but should,
1302 * so leave the check here.
1304 if (!target__none(&opts->target))
1305 evlist__enable(top->evlist);
1308 if (pthread_create(&thread_process, NULL, process_thread, top)) {
1309 ui__error("Could not create process thread.\n");
1313 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1314 display_thread), top)) {
1315 ui__error("Could not create display thread.\n");
1316 goto out_join_thread;
1319 if (top->realtime_prio) {
1320 struct sched_param param;
1322 param.sched_priority = top->realtime_prio;
1323 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1324 ui__error("Could not set realtime priority.\n");
1329 /* Wait for a minimal set of events before starting the snapshot */
1330 evlist__poll(top->evlist, 100);
1332 perf_top__mmap_read(top);
1335 u64 hits = top->samples;
1337 perf_top__mmap_read(top);
1339 if (opts->overwrite || (hits == top->samples))
1340 ret = evlist__poll(top->evlist, 100);
1343 perf_top__resize(top);
1350 pthread_join(thread, NULL);
1352 pthread_cond_signal(&top->qe.cond);
1353 pthread_join(thread_process, NULL);
1358 callchain_opt(const struct option *opt, const char *arg, int unset)
1360 symbol_conf.use_callchain = true;
1361 return record_callchain_opt(opt, arg, unset);
1365 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1367 struct callchain_param *callchain = opt->value;
1369 callchain->enabled = !unset;
1370 callchain->record_mode = CALLCHAIN_FP;
1376 symbol_conf.use_callchain = false;
1377 callchain->record_mode = CALLCHAIN_NONE;
1381 return parse_callchain_top_opt(arg);
1384 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1386 if (!strcmp(var, "top.call-graph")) {
1387 var = "call-graph.record-mode";
1388 return perf_default_config(var, value, cb);
1390 if (!strcmp(var, "top.children")) {
1391 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1399 parse_percent_limit(const struct option *opt, const char *arg,
1400 int unset __maybe_unused)
1402 struct perf_top *top = opt->value;
1404 top->min_percent = strtof(arg, NULL);
1408 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1409 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1411 int cmd_top(int argc, const char **argv)
1413 char errbuf[BUFSIZ];
1414 struct perf_top top = {
1418 .mmap_pages = UINT_MAX,
1419 .user_freq = UINT_MAX,
1420 .user_interval = ULLONG_MAX,
1421 .freq = 4000, /* 4 KHz */
1426 * FIXME: This will lose PERF_RECORD_MMAP and other metadata
1427 * when we pause, fix that and reenable. Probably using a
1428 * separate evlist with a dummy event, i.e. a non-overwrite
1429 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE
1430 * stays in overwrite mode. -acme
1433 .sample_time = true,
1434 .sample_time_set = true,
1436 .max_stack = sysctl__max_stack(),
1437 .annotation_opts = annotation__default_options,
1438 .nr_threads_synthesize = UINT_MAX,
1440 struct record_opts *opts = &top.record_opts;
1441 struct target *target = &opts->target;
1442 const struct option options[] = {
1443 OPT_CALLBACK('e', "event", &top.evlist, "event",
1444 "event selector. use 'perf list' to list available events",
1445 parse_events_option),
1446 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1447 OPT_STRING('p', "pid", &target->pid, "pid",
1448 "profile events on existing process id"),
1449 OPT_STRING('t', "tid", &target->tid, "tid",
1450 "profile events on existing thread id"),
1451 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1452 "system-wide collection from all CPUs"),
1453 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1454 "list of cpus to monitor"),
1455 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1456 "file", "vmlinux pathname"),
1457 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1458 "don't load vmlinux even if found"),
1459 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1460 "file", "kallsyms pathname"),
1461 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1462 "hide kernel symbols"),
1463 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1464 "number of mmap data pages", evlist__parse_mmap_pages),
1465 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1466 "collect data with this RT SCHED_FIFO priority"),
1467 OPT_INTEGER('d', "delay", &top.delay_secs,
1468 "number of seconds to delay between refreshes"),
1469 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1470 "dump the symbol table used for profiling"),
1471 OPT_INTEGER('f', "count-filter", &top.count_filter,
1472 "only display functions with more events than this"),
1473 OPT_BOOLEAN(0, "group", &opts->group,
1474 "put the counters into a counter group"),
1475 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1476 "child tasks do not inherit counters"),
1477 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1478 "symbol to annotate"),
1479 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1480 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
1481 "profile at this frequency",
1482 record__parse_freq),
1483 OPT_INTEGER('E', "entries", &top.print_entries,
1484 "display this many functions"),
1485 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1486 "hide user symbols"),
1487 #ifdef HAVE_SLANG_SUPPORT
1488 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1490 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1491 OPT_INCR('v', "verbose", &verbose,
1492 "be more verbose (show counter open errors, etc)"),
1493 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1494 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1495 " Please refer the man page for the complete list."),
1496 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1497 "output field(s): overhead, period, sample plus all of sort keys"),
1498 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1499 "Show a column with the number of samples"),
1500 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1501 NULL, "enables call-graph recording and display",
1503 OPT_CALLBACK(0, "call-graph", &callchain_param,
1504 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1505 top_callchain_help, &parse_callchain_opt),
1506 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1507 "Accumulate callchains of children and show total overhead as well"),
1508 OPT_INTEGER(0, "max-stack", &top.max_stack,
1509 "Set the maximum stack depth when parsing the callchain. "
1510 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1511 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1512 "ignore callees of these functions in call graphs",
1513 report_parse_ignore_callees_opt),
1514 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1515 "Show a column with the sum of periods"),
1516 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1517 "only consider symbols in these dsos"),
1518 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1519 "only consider symbols in these comms"),
1520 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1521 "only consider these symbols"),
1522 OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src,
1523 "Interleave source code with assembly code (default)"),
1524 OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw,
1525 "Display raw encoding of assembly instructions (default)"),
1526 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1527 "Enable kernel symbol demangling"),
1528 OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
1529 OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
1530 "objdump binary to use for disassembly and annotations"),
1531 OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
1532 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1533 OPT_STRING(0, "prefix", &top.annotation_opts.prefix, "prefix",
1534 "Add prefix to source file path names in programs (with --prefix-strip)"),
1535 OPT_STRING(0, "prefix-strip", &top.annotation_opts.prefix_strip, "N",
1536 "Strip first N entries of source file path name in programs (with --prefix)"),
1537 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1538 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1539 "Don't show entries under that percent", parse_percent_limit),
1540 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1541 "How to display percentage of filtered entries", parse_filter_percentage),
1542 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1544 "don't try to adjust column width, use these fixed values"),
1545 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1546 "per thread proc mmap processing timeout in ms"),
1547 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1548 "branch any", "sample any taken branches",
1549 parse_branch_stack),
1550 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1551 "branch filter mask", "branch stack filter modes",
1552 parse_branch_stack),
1553 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1554 "Show raw trace event output (do not use print fmt or plugins)"),
1555 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1556 "Show entries in a hierarchy"),
1557 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
1558 "Use a backward ring buffer, default: no"),
1559 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1560 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
1561 "number of thread to run event synthesize"),
1562 OPT_CALLBACK('G', "cgroup", &top.evlist, "name",
1563 "monitor event in cgroup name only", parse_cgroups),
1564 OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
1565 "Record namespaces events"),
1566 OPT_BOOLEAN(0, "all-cgroups", &opts->record_cgroup,
1567 "Record cgroup events"),
1568 OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,
1569 "Sort the output by the event at the index n in group. "
1570 "If n is invalid, sort by the first event. "
1571 "WARNING: should be used on grouped events."),
1572 OPT_BOOLEAN(0, "stitch-lbr", &top.stitch_lbr,
1573 "Enable LBR callgraph stitching approach"),
1575 OPT_CALLBACK(0, "pfm-events", &top.evlist, "event",
1576 "libpfm4 event selector. use 'perf list' to list available events",
1577 parse_libpfm_events_option),
1579 OPTS_EVSWITCH(&top.evswitch),
1582 const char * const top_usage[] = {
1583 "perf top [<options>]",
1586 int status = hists__init();
1591 top.annotation_opts.min_pcnt = 5;
1592 top.annotation_opts.context = 4;
1594 top.evlist = evlist__new();
1595 if (top.evlist == NULL)
1598 status = perf_config(perf_top_config, &top);
1602 * Since the per arch annotation init routine may need the cpuid, read
1603 * it here, since we are not getting this from the perf.data header.
1605 status = perf_env__read_cpuid(&perf_env);
1608 * Some arches do not provide a get_cpuid(), so just use pr_debug, otherwise
1609 * warn the user explicitly.
1611 eprintf(status == ENOSYS ? 1 : 0, verbose,
1612 "Couldn't read the cpuid for this machine: %s\n",
1613 str_error_r(errno, errbuf, sizeof(errbuf)));
1615 top.evlist->env = &perf_env;
1617 argc = parse_options(argc, argv, options, top_usage, 0);
1619 usage_with_options(top_usage, options);
1621 status = symbol__validate_sym_arguments();
1623 goto out_delete_evlist;
1625 if (annotate_check_args(&top.annotation_opts) < 0)
1626 goto out_delete_evlist;
1628 if (!top.evlist->core.nr_entries &&
1629 evlist__add_default(top.evlist) < 0) {
1630 pr_err("Not enough memory for event selector list\n");
1631 goto out_delete_evlist;
1634 status = evswitch__init(&top.evswitch, top.evlist, stderr);
1636 goto out_delete_evlist;
1638 if (symbol_conf.report_hierarchy) {
1639 /* disable incompatible options */
1640 symbol_conf.event_group = false;
1641 symbol_conf.cumulate_callchain = false;
1644 pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1645 parse_options_usage(top_usage, options, "fields", 0);
1646 parse_options_usage(NULL, options, "hierarchy", 0);
1647 goto out_delete_evlist;
1651 if (top.stitch_lbr && !(callchain_param.record_mode == CALLCHAIN_LBR)) {
1652 pr_err("Error: --stitch-lbr must be used with --call-graph lbr\n");
1653 goto out_delete_evlist;
1656 if (nr_cgroups > 0 && opts->record_cgroup) {
1657 pr_err("--cgroup and --all-cgroups cannot be used together\n");
1658 goto out_delete_evlist;
1661 if (opts->branch_stack && callchain_param.enabled)
1662 symbol_conf.show_branchflag_count = true;
1664 sort__mode = SORT_MODE__TOP;
1665 /* display thread wants entries to be collapsed in a different tree */
1666 perf_hpp_list.need_collapse = 1;
1670 #ifdef HAVE_SLANG_SUPPORT
1671 else if (top.use_tui)
1675 setup_browser(false);
1677 if (setup_sorting(top.evlist) < 0) {
1679 parse_options_usage(top_usage, options, "s", 1);
1681 parse_options_usage(sort_order ? NULL : top_usage,
1682 options, "fields", 0);
1683 goto out_delete_evlist;
1686 status = target__validate(target);
1688 target__strerror(target, status, errbuf, BUFSIZ);
1689 ui__warning("%s\n", errbuf);
1692 status = target__parse_uid(target);
1694 int saved_errno = errno;
1696 target__strerror(target, status, errbuf, BUFSIZ);
1697 ui__error("%s\n", errbuf);
1699 status = -saved_errno;
1700 goto out_delete_evlist;
1703 if (target__none(target))
1704 target->system_wide = true;
1706 if (evlist__create_maps(top.evlist, target) < 0) {
1707 ui__error("Couldn't create thread/CPU maps: %s\n",
1708 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1709 goto out_delete_evlist;
1712 if (top.delay_secs < 1)
1715 if (record_opts__config(opts)) {
1717 goto out_delete_evlist;
1720 top.sym_evsel = evlist__first(top.evlist);
1722 if (!callchain_param.enabled) {
1723 symbol_conf.cumulate_callchain = false;
1724 perf_hpp__cancel_cumulate();
1727 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1728 callchain_param.order = ORDER_CALLER;
1730 status = symbol__annotation_init();
1732 goto out_delete_evlist;
1734 annotation_config__init(&top.annotation_opts);
1736 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1737 status = symbol__init(NULL);
1739 goto out_delete_evlist;
1741 sort__setup_elide(stdout);
1743 get_term_dimensions(&top.winsize);
1744 if (top.print_entries == 0) {
1745 perf_top__update_print_entries(&top);
1746 signal(SIGWINCH, winch_sig);
1749 top.session = perf_session__new(NULL, NULL);
1750 if (IS_ERR(top.session)) {
1751 status = PTR_ERR(top.session);
1752 goto out_delete_evlist;
1755 #ifdef HAVE_LIBBPF_SUPPORT
1756 if (!top.record_opts.no_bpf_event) {
1757 top.sb_evlist = evlist__new();
1759 if (top.sb_evlist == NULL) {
1760 pr_err("Couldn't create side band evlist.\n.");
1761 goto out_delete_evlist;
1764 if (evlist__add_bpf_sb_event(top.sb_evlist, &perf_env)) {
1765 pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");
1766 goto out_delete_evlist;
1771 if (evlist__start_sb_thread(top.sb_evlist, target)) {
1772 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
1773 opts->no_bpf_event = true;
1776 status = __cmd_top(&top);
1778 if (!opts->no_bpf_event)
1779 evlist__stop_sb_thread(top.sb_evlist);
1782 evlist__delete(top.evlist);
1783 perf_session__delete(top.session);