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 mutex_lock(¬es->lock);
141 if (!symbol__hists(sym, top->evlist->core.nr_entries)) {
142 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 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)
199 EXCLUSIVE_LOCKS_REQUIRED(he->hists->lock)
201 struct annotation *notes;
202 struct symbol *sym = he->ms.sym;
205 if (sym == NULL || (use_browser == 0 &&
206 (top->sym_filter_entry == NULL ||
207 top->sym_filter_entry->ms.sym != sym)))
210 notes = symbol__annotation(sym);
212 if (!mutex_trylock(¬es->lock))
215 err = hist_entry__inc_addr_samples(he, sample, evsel, ip);
217 mutex_unlock(¬es->lock);
221 * This function is now called with he->hists->lock held.
222 * Release it before going to sleep.
224 mutex_unlock(&he->hists->lock);
226 if (err == -ERANGE && !he->ms.map->erange_warned)
227 ui__warn_map_erange(he->ms.map, sym, ip);
228 else if (err == -ENOMEM) {
229 pr_err("Not enough memory for annotating '%s' symbol!\n",
234 mutex_lock(&he->hists->lock);
238 static void perf_top__show_details(struct perf_top *top)
240 struct hist_entry *he = top->sym_filter_entry;
242 struct annotation *notes;
243 struct symbol *symbol;
249 evsel = hists_to_evsel(he->hists);
252 notes = symbol__annotation(symbol);
254 mutex_lock(¬es->lock);
256 symbol__calc_percent(symbol, evsel);
258 if (notes->src == NULL)
261 printf("Showing %s for %s\n", evsel__name(top->sym_evsel), symbol->name);
262 printf(" Events Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt);
264 more = symbol__annotate_printf(&he->ms, top->sym_evsel, &top->annotation_opts);
266 if (top->evlist->enabled) {
268 symbol__annotate_zero_histogram(symbol, top->sym_evsel->core.idx);
270 symbol__annotate_decay_histogram(symbol, top->sym_evsel->core.idx);
273 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
275 mutex_unlock(¬es->lock);
278 static void perf_top__resort_hists(struct perf_top *t)
280 struct evlist *evlist = t->evlist;
283 evlist__for_each_entry(evlist, pos) {
284 struct hists *hists = evsel__hists(pos);
287 * unlink existing entries so that they can be linked
288 * in a correct order in hists__match() below.
290 hists__unlink(hists);
292 if (evlist->enabled) {
294 hists__delete_entries(hists);
296 hists__decay_entries(hists, t->hide_user_symbols,
297 t->hide_kernel_symbols);
301 hists__collapse_resort(hists, NULL);
303 /* Non-group events are considered as leader */
304 if (symbol_conf.event_group && !evsel__is_group_leader(pos)) {
305 struct hists *leader_hists = evsel__hists(evsel__leader(pos));
307 hists__match(leader_hists, hists);
308 hists__link(leader_hists, hists);
312 evlist__for_each_entry(evlist, pos) {
313 evsel__output_resort(pos, NULL);
317 static void perf_top__print_sym_table(struct perf_top *top)
321 const int win_width = top->winsize.ws_col - 1;
322 struct evsel *evsel = top->sym_evsel;
323 struct hists *hists = evsel__hists(evsel);
327 perf_top__header_snprintf(top, bf, sizeof(bf));
330 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
332 if (!top->record_opts.overwrite &&
333 (top->evlist->stats.nr_lost_warned !=
334 top->evlist->stats.nr_events[PERF_RECORD_LOST])) {
335 top->evlist->stats.nr_lost_warned =
336 top->evlist->stats.nr_events[PERF_RECORD_LOST];
337 color_fprintf(stdout, PERF_COLOR_RED,
338 "WARNING: LOST %d chunks, Check IO/CPU overload",
339 top->evlist->stats.nr_lost_warned);
343 if (top->sym_filter_entry) {
344 perf_top__show_details(top);
348 perf_top__resort_hists(top);
350 hists__output_recalc_col_len(hists, top->print_entries - printed);
352 hists__fprintf(hists, false, top->print_entries - printed, win_width,
353 top->min_percent, stdout, !symbol_conf.use_callchain);
356 static void prompt_integer(int *target, const char *msg)
358 char *buf = malloc(0), *p;
362 fprintf(stdout, "\n%s: ", msg);
363 if (getline(&buf, &dummy, stdin) < 0)
366 p = strchr(buf, '\n');
376 tmp = strtoul(buf, NULL, 10);
382 static void prompt_percent(int *target, const char *msg)
386 prompt_integer(&tmp, msg);
387 if (tmp >= 0 && tmp <= 100)
391 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
393 char *buf = malloc(0), *p;
394 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
395 struct hists *hists = evsel__hists(top->sym_evsel);
396 struct rb_node *next;
399 /* zero counters of active symbol */
401 __zero_source_counters(syme);
402 top->sym_filter_entry = NULL;
405 fprintf(stdout, "\n%s: ", msg);
406 if (getline(&buf, &dummy, stdin) < 0)
409 p = strchr(buf, '\n');
413 next = rb_first_cached(&hists->entries);
415 n = rb_entry(next, struct hist_entry, rb_node);
416 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
420 next = rb_next(&n->rb_node);
424 fprintf(stderr, "Sorry, %s is not active.\n", buf);
427 perf_top__parse_source(top, found);
433 static void perf_top__print_mapped_keys(struct perf_top *top)
437 if (top->sym_filter_entry) {
438 struct symbol *sym = top->sym_filter_entry->ms.sym;
442 fprintf(stdout, "\nMapped keys:\n");
443 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
444 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
446 if (top->evlist->core.nr_entries > 1)
447 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", evsel__name(top->sym_evsel));
449 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
451 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt);
452 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
453 fprintf(stdout, "\t[S] stop annotation.\n");
456 "\t[K] hide kernel symbols. \t(%s)\n",
457 top->hide_kernel_symbols ? "yes" : "no");
459 "\t[U] hide user symbols. \t(%s)\n",
460 top->hide_user_symbols ? "yes" : "no");
461 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
462 fprintf(stdout, "\t[qQ] quit.\n");
465 static int perf_top__key_mapped(struct perf_top *top, int c)
481 return top->evlist->core.nr_entries > 1 ? 1 : 0;
489 static bool perf_top__handle_keypress(struct perf_top *top, int c)
493 if (!perf_top__key_mapped(top, c)) {
494 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
497 perf_top__print_mapped_keys(top);
498 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
501 set_term_quiet_input(&save);
503 poll(&stdin_poll, 1, -1);
506 tcsetattr(0, TCSAFLUSH, &save);
507 if (!perf_top__key_mapped(top, c))
513 prompt_integer(&top->delay_secs, "Enter display delay");
514 if (top->delay_secs < 1)
518 prompt_integer(&top->print_entries, "Enter display entries (lines)");
519 if (top->print_entries == 0) {
520 perf_top__resize(top);
521 signal(SIGWINCH, winch_sig);
523 signal(SIGWINCH, SIG_DFL);
527 if (top->evlist->core.nr_entries > 1) {
528 /* Select 0 as the default event: */
531 fprintf(stderr, "\nAvailable events:");
533 evlist__for_each_entry(top->evlist, top->sym_evsel)
534 fprintf(stderr, "\n\t%d %s", top->sym_evsel->core.idx, evsel__name(top->sym_evsel));
536 prompt_integer(&counter, "Enter details event counter");
538 if (counter >= top->evlist->core.nr_entries) {
539 top->sym_evsel = evlist__first(top->evlist);
540 fprintf(stderr, "Sorry, no such event, using %s.\n", evsel__name(top->sym_evsel));
544 evlist__for_each_entry(top->evlist, top->sym_evsel)
545 if (top->sym_evsel->core.idx == counter)
548 top->sym_evsel = evlist__first(top->evlist);
551 prompt_integer(&top->count_filter, "Enter display event count filter");
554 prompt_percent(&top->annotation_opts.min_pcnt,
555 "Enter details display event filter (percent)");
558 top->hide_kernel_symbols = !top->hide_kernel_symbols;
562 printf("exiting.\n");
563 if (top->dump_symtab)
564 perf_session__fprintf_dsos(top->session, stderr);
568 perf_top__prompt_symbol(top, "Enter details symbol");
571 if (!top->sym_filter_entry)
574 struct hist_entry *syme = top->sym_filter_entry;
576 top->sym_filter_entry = NULL;
577 __zero_source_counters(syme);
581 top->hide_user_symbols = !top->hide_user_symbols;
584 top->zero = !top->zero;
593 static void perf_top__sort_new_samples(void *arg)
595 struct perf_top *t = arg;
597 if (t->evlist->selected != NULL)
598 t->sym_evsel = t->evlist->selected;
600 perf_top__resort_hists(t);
602 if (t->lost || t->drop)
603 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n");
606 static void stop_top(void)
612 static void *display_thread_tui(void *arg)
615 struct perf_top *top = arg;
616 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
617 struct hist_browser_timer hbt = {
618 .timer = perf_top__sort_new_samples,
620 .refresh = top->delay_secs,
624 /* In order to read symbols from other namespaces perf to needs to call
625 * setns(2). This isn't permitted if the struct_fs has multiple users.
626 * unshare(2) the fs so that we may continue to setns into namespaces
627 * that we're observing.
631 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
634 perf_top__sort_new_samples(top);
637 * Initialize the uid_filter_str, in the future the TUI will allow
638 * Zooming in/out UIDs. For now just use whatever the user passed
641 evlist__for_each_entry(top->evlist, pos) {
642 struct hists *hists = evsel__hists(pos);
643 hists->uid_filter_str = top->record_opts.target.uid_str;
646 ret = evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
647 &top->session->header.env, !top->record_opts.overwrite,
648 &top->annotation_opts);
649 if (ret == K_RELOAD) {
658 static void display_sig(int sig __maybe_unused)
663 static void display_setup_sig(void)
665 signal(SIGSEGV, sighandler_dump_stack);
666 signal(SIGFPE, sighandler_dump_stack);
667 signal(SIGINT, display_sig);
668 signal(SIGQUIT, display_sig);
669 signal(SIGTERM, display_sig);
672 static void *display_thread(void *arg)
674 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
676 struct perf_top *top = arg;
679 /* In order to read symbols from other namespaces perf to needs to call
680 * setns(2). This isn't permitted if the struct_fs has multiple users.
681 * unshare(2) the fs so that we may continue to setns into namespaces
682 * that we're observing.
686 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
689 pthread__unblock_sigwinch();
691 delay_msecs = top->delay_secs * MSEC_PER_SEC;
692 set_term_quiet_input(&save);
695 if (poll(&stdin_poll, 1, 0) > 0)
699 perf_top__print_sym_table(top);
701 * Either timeout expired or we got an EINTR due to SIGWINCH,
702 * refresh screen in both cases.
704 switch (poll(&stdin_poll, 1, delay_msecs)) {
713 tcsetattr(0, TCSAFLUSH, &save);
715 if (perf_top__handle_keypress(top, c))
721 tcsetattr(0, TCSAFLUSH, &save);
725 static int hist_iter__top_callback(struct hist_entry_iter *iter,
726 struct addr_location *al, bool single,
728 EXCLUSIVE_LOCKS_REQUIRED(iter->he->hists->lock)
730 struct perf_top *top = arg;
731 struct evsel *evsel = iter->evsel;
733 if (perf_hpp_list.sym && single)
734 perf_top__record_precise_ip(top, iter->he, iter->sample, evsel, al->addr);
736 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
737 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY),
742 static void perf_event__process_sample(struct perf_tool *tool,
743 const union perf_event *event,
745 struct perf_sample *sample,
746 struct machine *machine)
748 struct perf_top *top = container_of(tool, struct perf_top, tool);
749 struct addr_location al;
751 if (!machine && perf_guest) {
752 static struct intlist *seen;
755 seen = intlist__new(NULL);
757 if (!intlist__has_entry(seen, sample->pid)) {
758 pr_err("Can't find guest [%d]'s kernel information\n",
760 intlist__add(seen, sample->pid);
766 pr_err("%u unprocessable samples recorded.\r",
767 top->session->evlist->stats.nr_unprocessable_samples++);
771 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
772 top->exact_samples++;
774 if (machine__resolve(machine, &al, sample) < 0)
778 al.thread->lbr_stitch_enable = true;
780 if (!machine->kptr_restrict_warned &&
781 symbol_conf.kptr_restrict &&
782 al.cpumode == PERF_RECORD_MISC_KERNEL) {
783 if (!evlist__exclude_kernel(top->session->evlist)) {
785 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
786 "Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
787 "Kernel%s samples will not be resolved.\n",
788 al.map && map__has_symbols(al.map) ?
790 if (use_browser <= 0)
793 machine->kptr_restrict_warned = true;
796 if (al.sym == NULL && al.map != NULL) {
797 const char *msg = "Kernel samples will not be resolved.\n";
799 * As we do lazy loading of symtabs we only will know if the
800 * specified vmlinux file is invalid when we actually have a
801 * hit in kernel space and then try to load it. So if we get
802 * here and there are _no_ symbols in the DSO backing the
803 * kernel map, bail out.
805 * We may never get here, for instance, if we use -K/
806 * --hide-kernel-symbols, even if the user specifies an
807 * invalid --vmlinux ;-)
809 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
810 __map__is_kernel(al.map) && map__has_symbols(al.map)) {
811 if (symbol_conf.vmlinux_name) {
813 dso__strerror_load(al.map->dso, serr, sizeof(serr));
814 ui__warning("The %s file can't be used: %s\n%s",
815 symbol_conf.vmlinux_name, serr, msg);
817 ui__warning("A vmlinux file was not found.\n%s",
821 if (use_browser <= 0)
823 top->vmlinux_warned = true;
827 if (al.sym == NULL || !al.sym->idle) {
828 struct hists *hists = evsel__hists(evsel);
829 struct hist_entry_iter iter = {
832 .add_entry_cb = hist_iter__top_callback,
835 if (symbol_conf.cumulate_callchain)
836 iter.ops = &hist_iter_cumulative;
838 iter.ops = &hist_iter_normal;
840 mutex_lock(&hists->lock);
842 if (hist_entry_iter__add(&iter, &al, top->max_stack, top) < 0)
843 pr_err("Problem incrementing symbol period, skipping event\n");
845 mutex_unlock(&hists->lock);
848 addr_location__put(&al);
852 perf_top__process_lost(struct perf_top *top, union perf_event *event,
855 top->lost += event->lost.lost;
856 top->lost_total += event->lost.lost;
857 evsel->evlist->stats.total_lost += event->lost.lost;
861 perf_top__process_lost_samples(struct perf_top *top,
862 union perf_event *event,
865 top->lost += event->lost_samples.lost;
866 top->lost_total += event->lost_samples.lost;
867 evsel->evlist->stats.total_lost_samples += event->lost_samples.lost;
870 static u64 last_timestamp;
872 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
874 struct record_opts *opts = &top->record_opts;
875 struct evlist *evlist = top->evlist;
877 union perf_event *event;
879 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
880 if (perf_mmap__read_init(&md->core) < 0)
883 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
886 ret = evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
887 if (ret && ret != -1)
890 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0, NULL);
894 perf_mmap__consume(&md->core);
896 if (top->qe.rotate) {
897 mutex_lock(&top->qe.mutex);
898 top->qe.rotate = false;
899 cond_signal(&top->qe.cond);
900 mutex_unlock(&top->qe.mutex);
904 perf_mmap__read_done(&md->core);
907 static void perf_top__mmap_read(struct perf_top *top)
909 bool overwrite = top->record_opts.overwrite;
910 struct evlist *evlist = top->evlist;
914 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
916 for (i = 0; i < top->evlist->core.nr_mmaps; i++)
917 perf_top__mmap_read_idx(top, i);
920 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
921 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
926 * Check per-event overwrite term.
927 * perf top should support consistent term for all events.
928 * - All events don't have per-event term
929 * E.g. "cpu/cpu-cycles/,cpu/instructions/"
930 * Nothing change, return 0.
931 * - All events have same per-event term
932 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
933 * Using the per-event setting to replace the opts->overwrite if
934 * they are different, then return 0.
935 * - Events have different per-event term
936 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
938 * - Some of the event set per-event term, but some not.
939 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
942 static int perf_top__overwrite_check(struct perf_top *top)
944 struct record_opts *opts = &top->record_opts;
945 struct evlist *evlist = top->evlist;
946 struct evsel_config_term *term;
947 struct list_head *config_terms;
949 int set, overwrite = -1;
951 evlist__for_each_entry(evlist, evsel) {
953 config_terms = &evsel->config_terms;
954 list_for_each_entry(term, config_terms, list) {
955 if (term->type == EVSEL__CONFIG_TERM_OVERWRITE)
956 set = term->val.overwrite ? 1 : 0;
959 /* no term for current and previous event (likely) */
960 if ((overwrite < 0) && (set < 0))
963 /* has term for both current and previous event, compare */
964 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
967 /* no term for current event but has term for previous one */
968 if ((overwrite >= 0) && (set < 0))
971 /* has term for current event */
972 if ((overwrite < 0) && (set >= 0)) {
973 /* if it's first event, set overwrite */
974 if (evsel == evlist__first(evlist))
981 if ((overwrite >= 0) && (opts->overwrite != overwrite))
982 opts->overwrite = overwrite;
987 static int perf_top_overwrite_fallback(struct perf_top *top,
990 struct record_opts *opts = &top->record_opts;
991 struct evlist *evlist = top->evlist;
992 struct evsel *counter;
994 if (!opts->overwrite)
997 /* only fall back when first event fails */
998 if (evsel != evlist__first(evlist))
1001 evlist__for_each_entry(evlist, counter)
1002 counter->core.attr.write_backward = false;
1003 opts->overwrite = false;
1004 pr_debug2("fall back to non-overwrite mode\n");
1008 static int perf_top__start_counters(struct perf_top *top)
1011 struct evsel *counter;
1012 struct evlist *evlist = top->evlist;
1013 struct record_opts *opts = &top->record_opts;
1015 if (perf_top__overwrite_check(top)) {
1016 ui__error("perf top only support consistent per-event "
1017 "overwrite setting for all events\n");
1021 evlist__config(evlist, opts, &callchain_param);
1023 evlist__for_each_entry(evlist, counter) {
1025 if (evsel__open(counter, top->evlist->core.user_requested_cpus,
1026 top->evlist->core.threads) < 0) {
1029 * Specially handle overwrite fall back.
1030 * Because perf top is the only tool which has
1031 * overwrite mode by default, support
1032 * both overwrite and non-overwrite mode, and
1033 * require consistent mode for all events.
1035 * May move it to generic code with more tools
1036 * have similar attribute.
1038 if (perf_missing_features.write_backward &&
1039 perf_top_overwrite_fallback(top, counter))
1042 if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
1044 ui__warning("%s\n", msg);
1048 evsel__open_strerror(counter, &opts->target, errno, msg, sizeof(msg));
1049 ui__error("%s\n", msg);
1054 if (evlist__mmap(evlist, opts->mmap_pages) < 0) {
1055 ui__error("Failed to mmap with %d (%s)\n",
1056 errno, str_error_r(errno, msg, sizeof(msg)));
1066 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
1068 if (callchain->mode != CHAIN_NONE) {
1069 if (callchain_register_param(callchain) < 0) {
1070 ui__error("Can't register callchain params.\n");
1078 static struct ordered_events *rotate_queues(struct perf_top *top)
1080 struct ordered_events *in = top->qe.in;
1082 if (top->qe.in == &top->qe.data[1])
1083 top->qe.in = &top->qe.data[0];
1085 top->qe.in = &top->qe.data[1];
1090 static void *process_thread(void *arg)
1092 struct perf_top *top = arg;
1095 struct ordered_events *out, *in = top->qe.in;
1097 if (!in->nr_events) {
1102 out = rotate_queues(top);
1104 mutex_lock(&top->qe.mutex);
1105 top->qe.rotate = true;
1106 cond_wait(&top->qe.cond, &top->qe.mutex);
1107 mutex_unlock(&top->qe.mutex);
1109 if (ordered_events__flush(out, OE_FLUSH__TOP))
1110 pr_err("failed to process events\n");
1117 * Allow only 'top->delay_secs' seconds behind samples.
1119 static int should_drop(struct ordered_event *qevent, struct perf_top *top)
1121 union perf_event *event = qevent->event;
1122 u64 delay_timestamp;
1124 if (event->header.type != PERF_RECORD_SAMPLE)
1127 delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC;
1128 return delay_timestamp < last_timestamp;
1131 static int deliver_event(struct ordered_events *qe,
1132 struct ordered_event *qevent)
1134 struct perf_top *top = qe->data;
1135 struct evlist *evlist = top->evlist;
1136 struct perf_session *session = top->session;
1137 union perf_event *event = qevent->event;
1138 struct perf_sample sample;
1139 struct evsel *evsel;
1140 struct machine *machine;
1143 if (should_drop(qevent, top)) {
1149 ret = evlist__parse_sample(evlist, event, &sample);
1151 pr_err("Can't parse sample, err = %d\n", ret);
1155 evsel = evlist__id2evsel(session->evlist, sample.id);
1156 assert(evsel != NULL);
1158 if (event->header.type == PERF_RECORD_SAMPLE) {
1159 if (evswitch__discard(&top->evswitch, evsel))
1164 switch (sample.cpumode) {
1165 case PERF_RECORD_MISC_USER:
1167 if (top->hide_user_symbols)
1169 machine = &session->machines.host;
1171 case PERF_RECORD_MISC_KERNEL:
1172 ++top->kernel_samples;
1173 if (top->hide_kernel_symbols)
1175 machine = &session->machines.host;
1177 case PERF_RECORD_MISC_GUEST_KERNEL:
1178 ++top->guest_kernel_samples;
1179 machine = perf_session__find_machine(session,
1182 case PERF_RECORD_MISC_GUEST_USER:
1183 ++top->guest_us_samples;
1185 * TODO: we don't process guest user from host side
1186 * except simple counting.
1190 if (event->header.type == PERF_RECORD_SAMPLE)
1192 machine = &session->machines.host;
1196 if (event->header.type == PERF_RECORD_SAMPLE) {
1197 perf_event__process_sample(&top->tool, event, evsel,
1199 } else if (event->header.type == PERF_RECORD_LOST) {
1200 perf_top__process_lost(top, event, evsel);
1201 } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) {
1202 perf_top__process_lost_samples(top, event, evsel);
1203 } else if (event->header.type < PERF_RECORD_MAX) {
1204 events_stats__inc(&session->evlist->stats, event->header.type);
1205 machine__process_event(machine, event, &sample);
1207 ++session->evlist->stats.nr_unknown_events;
1214 static void init_process_thread(struct perf_top *top)
1216 ordered_events__init(&top->qe.data[0], deliver_event, top);
1217 ordered_events__init(&top->qe.data[1], deliver_event, top);
1218 ordered_events__set_copy_on_queue(&top->qe.data[0], true);
1219 ordered_events__set_copy_on_queue(&top->qe.data[1], true);
1220 top->qe.in = &top->qe.data[0];
1221 mutex_init(&top->qe.mutex);
1222 cond_init(&top->qe.cond);
1225 static int __cmd_top(struct perf_top *top)
1227 struct record_opts *opts = &top->record_opts;
1228 pthread_t thread, thread_process;
1231 if (!top->annotation_opts.objdump_path) {
1232 ret = perf_env__lookup_objdump(&top->session->header.env,
1233 &top->annotation_opts.objdump_path);
1238 ret = callchain_param__setup_sample_type(&callchain_param);
1242 if (perf_session__register_idle_thread(top->session) < 0)
1245 if (top->nr_threads_synthesize > 1)
1246 perf_set_multithreaded();
1248 init_process_thread(top);
1250 if (opts->record_namespaces)
1251 top->tool.namespace_events = true;
1252 if (opts->record_cgroup) {
1253 #ifdef HAVE_FILE_HANDLE
1254 top->tool.cgroup_events = true;
1256 pr_err("cgroup tracking is not supported.\n");
1261 ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
1262 &top->session->machines.host,
1265 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n");
1267 ret = perf_event__synthesize_cgroups(&top->tool, perf_event__process,
1268 &top->session->machines.host);
1270 pr_debug("Couldn't synthesize cgroup events.\n");
1272 machine__synthesize_threads(&top->session->machines.host, &opts->target,
1273 top->evlist->core.threads, true, false,
1274 top->nr_threads_synthesize);
1276 if (top->nr_threads_synthesize > 1)
1277 perf_set_singlethreaded();
1279 if (perf_hpp_list.socket) {
1280 ret = perf_env__read_cpu_topology_map(&perf_env);
1282 char errbuf[BUFSIZ];
1283 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1285 ui__error("Could not read the CPU topology map: %s\n", err);
1290 ret = perf_top__start_counters(top);
1294 top->session->evlist = top->evlist;
1295 perf_session__set_id_hdr_size(top->session);
1298 * When perf is starting the traced process, all the events (apart from
1299 * group members) have enable_on_exec=1 set, so don't spoil it by
1300 * prematurely enabling them.
1302 * XXX 'top' still doesn't start workloads like record, trace, but should,
1303 * so leave the check here.
1305 if (!target__none(&opts->target))
1306 evlist__enable(top->evlist);
1309 if (pthread_create(&thread_process, NULL, process_thread, top)) {
1310 ui__error("Could not create process thread.\n");
1314 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1315 display_thread), top)) {
1316 ui__error("Could not create display thread.\n");
1317 goto out_join_thread;
1320 if (top->realtime_prio) {
1321 struct sched_param param;
1323 param.sched_priority = top->realtime_prio;
1324 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1325 ui__error("Could not set realtime priority.\n");
1330 /* Wait for a minimal set of events before starting the snapshot */
1331 evlist__poll(top->evlist, 100);
1333 perf_top__mmap_read(top);
1336 u64 hits = top->samples;
1338 perf_top__mmap_read(top);
1340 if (opts->overwrite || (hits == top->samples))
1341 ret = evlist__poll(top->evlist, 100);
1344 perf_top__resize(top);
1351 pthread_join(thread, NULL);
1353 cond_signal(&top->qe.cond);
1354 pthread_join(thread_process, NULL);
1359 callchain_opt(const struct option *opt, const char *arg, int unset)
1361 symbol_conf.use_callchain = true;
1362 return record_callchain_opt(opt, arg, unset);
1366 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1368 struct callchain_param *callchain = opt->value;
1370 callchain->enabled = !unset;
1371 callchain->record_mode = CALLCHAIN_FP;
1377 symbol_conf.use_callchain = false;
1378 callchain->record_mode = CALLCHAIN_NONE;
1382 return parse_callchain_top_opt(arg);
1385 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1387 if (!strcmp(var, "top.call-graph")) {
1388 var = "call-graph.record-mode";
1389 return perf_default_config(var, value, cb);
1391 if (!strcmp(var, "top.children")) {
1392 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1400 parse_percent_limit(const struct option *opt, const char *arg,
1401 int unset __maybe_unused)
1403 struct perf_top *top = opt->value;
1405 top->min_percent = strtof(arg, NULL);
1409 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1410 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1412 int cmd_top(int argc, const char **argv)
1414 char errbuf[BUFSIZ];
1415 struct perf_top top = {
1419 .mmap_pages = UINT_MAX,
1420 .user_freq = UINT_MAX,
1421 .user_interval = ULLONG_MAX,
1422 .freq = 4000, /* 4 KHz */
1427 * FIXME: This will lose PERF_RECORD_MMAP and other metadata
1428 * when we pause, fix that and reenable. Probably using a
1429 * separate evlist with a dummy event, i.e. a non-overwrite
1430 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE
1431 * stays in overwrite mode. -acme
1434 .sample_time = true,
1435 .sample_time_set = true,
1437 .max_stack = sysctl__max_stack(),
1438 .annotation_opts = annotation__default_options,
1439 .nr_threads_synthesize = UINT_MAX,
1441 struct record_opts *opts = &top.record_opts;
1442 struct target *target = &opts->target;
1443 const struct option options[] = {
1444 OPT_CALLBACK('e', "event", &top.evlist, "event",
1445 "event selector. use 'perf list' to list available events",
1446 parse_events_option),
1447 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1448 OPT_STRING('p', "pid", &target->pid, "pid",
1449 "profile events on existing process id"),
1450 OPT_STRING('t', "tid", &target->tid, "tid",
1451 "profile events on existing thread id"),
1452 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1453 "system-wide collection from all CPUs"),
1454 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1455 "list of cpus to monitor"),
1456 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1457 "file", "vmlinux pathname"),
1458 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1459 "don't load vmlinux even if found"),
1460 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1461 "file", "kallsyms pathname"),
1462 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1463 "hide kernel symbols"),
1464 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1465 "number of mmap data pages", evlist__parse_mmap_pages),
1466 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1467 "collect data with this RT SCHED_FIFO priority"),
1468 OPT_INTEGER('d', "delay", &top.delay_secs,
1469 "number of seconds to delay between refreshes"),
1470 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1471 "dump the symbol table used for profiling"),
1472 OPT_INTEGER('f', "count-filter", &top.count_filter,
1473 "only display functions with more events than this"),
1474 OPT_BOOLEAN(0, "group", &opts->group,
1475 "put the counters into a counter group"),
1476 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1477 "child tasks do not inherit counters"),
1478 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1479 "symbol to annotate"),
1480 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1481 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
1482 "profile at this frequency",
1483 record__parse_freq),
1484 OPT_INTEGER('E', "entries", &top.print_entries,
1485 "display this many functions"),
1486 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1487 "hide user symbols"),
1488 #ifdef HAVE_SLANG_SUPPORT
1489 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1491 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1492 OPT_INCR('v', "verbose", &verbose,
1493 "be more verbose (show counter open errors, etc)"),
1494 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1495 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1496 " Please refer the man page for the complete list."),
1497 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1498 "output field(s): overhead, period, sample plus all of sort keys"),
1499 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1500 "Show a column with the number of samples"),
1501 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1502 NULL, "enables call-graph recording and display",
1504 OPT_CALLBACK(0, "call-graph", &callchain_param,
1505 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1506 top_callchain_help, &parse_callchain_opt),
1507 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1508 "Accumulate callchains of children and show total overhead as well"),
1509 OPT_INTEGER(0, "max-stack", &top.max_stack,
1510 "Set the maximum stack depth when parsing the callchain. "
1511 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1512 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1513 "ignore callees of these functions in call graphs",
1514 report_parse_ignore_callees_opt),
1515 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1516 "Show a column with the sum of periods"),
1517 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1518 "only consider symbols in these dsos"),
1519 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1520 "only consider symbols in these comms"),
1521 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1522 "only consider these symbols"),
1523 OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src,
1524 "Interleave source code with assembly code (default)"),
1525 OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw,
1526 "Display raw encoding of assembly instructions (default)"),
1527 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1528 "Enable kernel symbol demangling"),
1529 OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
1530 OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
1531 "objdump binary to use for disassembly and annotations"),
1532 OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
1533 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1534 OPT_STRING(0, "prefix", &top.annotation_opts.prefix, "prefix",
1535 "Add prefix to source file path names in programs (with --prefix-strip)"),
1536 OPT_STRING(0, "prefix-strip", &top.annotation_opts.prefix_strip, "N",
1537 "Strip first N entries of source file path name in programs (with --prefix)"),
1538 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1539 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1540 "Don't show entries under that percent", parse_percent_limit),
1541 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1542 "How to display percentage of filtered entries", parse_filter_percentage),
1543 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1545 "don't try to adjust column width, use these fixed values"),
1546 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1547 "per thread proc mmap processing timeout in ms"),
1548 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1549 "branch any", "sample any taken branches",
1550 parse_branch_stack),
1551 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1552 "branch filter mask", "branch stack filter modes",
1553 parse_branch_stack),
1554 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1555 "Show raw trace event output (do not use print fmt or plugins)"),
1556 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1557 "Show entries in a hierarchy"),
1558 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
1559 "Use a backward ring buffer, default: no"),
1560 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1561 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
1562 "number of thread to run event synthesize"),
1563 OPT_CALLBACK('G', "cgroup", &top.evlist, "name",
1564 "monitor event in cgroup name only", parse_cgroups),
1565 OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
1566 "Record namespaces events"),
1567 OPT_BOOLEAN(0, "all-cgroups", &opts->record_cgroup,
1568 "Record cgroup events"),
1569 OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,
1570 "Sort the output by the event at the index n in group. "
1571 "If n is invalid, sort by the first event. "
1572 "WARNING: should be used on grouped events."),
1573 OPT_BOOLEAN(0, "stitch-lbr", &top.stitch_lbr,
1574 "Enable LBR callgraph stitching approach"),
1576 OPT_CALLBACK(0, "pfm-events", &top.evlist, "event",
1577 "libpfm4 event selector. use 'perf list' to list available events",
1578 parse_libpfm_events_option),
1580 OPTS_EVSWITCH(&top.evswitch),
1583 const char * const top_usage[] = {
1584 "perf top [<options>]",
1587 int status = hists__init();
1592 top.annotation_opts.min_pcnt = 5;
1593 top.annotation_opts.context = 4;
1595 top.evlist = evlist__new();
1596 if (top.evlist == NULL)
1599 status = perf_config(perf_top_config, &top);
1603 * Since the per arch annotation init routine may need the cpuid, read
1604 * it here, since we are not getting this from the perf.data header.
1606 status = perf_env__read_cpuid(&perf_env);
1609 * Some arches do not provide a get_cpuid(), so just use pr_debug, otherwise
1610 * warn the user explicitly.
1612 eprintf(status == ENOSYS ? 1 : 0, verbose,
1613 "Couldn't read the cpuid for this machine: %s\n",
1614 str_error_r(errno, errbuf, sizeof(errbuf)));
1616 top.evlist->env = &perf_env;
1618 argc = parse_options(argc, argv, options, top_usage, 0);
1620 usage_with_options(top_usage, options);
1622 status = symbol__validate_sym_arguments();
1624 goto out_delete_evlist;
1626 if (annotate_check_args(&top.annotation_opts) < 0)
1627 goto out_delete_evlist;
1629 if (!top.evlist->core.nr_entries &&
1630 evlist__add_default(top.evlist) < 0) {
1631 pr_err("Not enough memory for event selector list\n");
1632 goto out_delete_evlist;
1635 status = evswitch__init(&top.evswitch, top.evlist, stderr);
1637 goto out_delete_evlist;
1639 if (symbol_conf.report_hierarchy) {
1640 /* disable incompatible options */
1641 symbol_conf.event_group = false;
1642 symbol_conf.cumulate_callchain = false;
1645 pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1646 parse_options_usage(top_usage, options, "fields", 0);
1647 parse_options_usage(NULL, options, "hierarchy", 0);
1648 goto out_delete_evlist;
1652 if (top.stitch_lbr && !(callchain_param.record_mode == CALLCHAIN_LBR)) {
1653 pr_err("Error: --stitch-lbr must be used with --call-graph lbr\n");
1654 goto out_delete_evlist;
1657 if (nr_cgroups > 0 && opts->record_cgroup) {
1658 pr_err("--cgroup and --all-cgroups cannot be used together\n");
1659 goto out_delete_evlist;
1662 if (opts->branch_stack && callchain_param.enabled)
1663 symbol_conf.show_branchflag_count = true;
1665 sort__mode = SORT_MODE__TOP;
1666 /* display thread wants entries to be collapsed in a different tree */
1667 perf_hpp_list.need_collapse = 1;
1671 #ifdef HAVE_SLANG_SUPPORT
1672 else if (top.use_tui)
1676 setup_browser(false);
1678 if (setup_sorting(top.evlist) < 0) {
1680 parse_options_usage(top_usage, options, "s", 1);
1682 parse_options_usage(sort_order ? NULL : top_usage,
1683 options, "fields", 0);
1684 goto out_delete_evlist;
1687 status = target__validate(target);
1689 target__strerror(target, status, errbuf, BUFSIZ);
1690 ui__warning("%s\n", errbuf);
1693 status = target__parse_uid(target);
1695 int saved_errno = errno;
1697 target__strerror(target, status, errbuf, BUFSIZ);
1698 ui__error("%s\n", errbuf);
1700 status = -saved_errno;
1701 goto out_delete_evlist;
1704 if (target__none(target))
1705 target->system_wide = true;
1707 if (evlist__create_maps(top.evlist, target) < 0) {
1708 ui__error("Couldn't create thread/CPU maps: %s\n",
1709 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1711 goto out_delete_evlist;
1714 if (top.delay_secs < 1)
1717 if (record_opts__config(opts)) {
1719 goto out_delete_evlist;
1722 top.sym_evsel = evlist__first(top.evlist);
1724 if (!callchain_param.enabled) {
1725 symbol_conf.cumulate_callchain = false;
1726 perf_hpp__cancel_cumulate();
1729 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1730 callchain_param.order = ORDER_CALLER;
1732 status = symbol__annotation_init();
1734 goto out_delete_evlist;
1736 annotation_config__init(&top.annotation_opts);
1738 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1739 status = symbol__init(NULL);
1741 goto out_delete_evlist;
1743 sort__setup_elide(stdout);
1745 get_term_dimensions(&top.winsize);
1746 if (top.print_entries == 0) {
1747 perf_top__update_print_entries(&top);
1748 signal(SIGWINCH, winch_sig);
1751 top.session = perf_session__new(NULL, NULL);
1752 if (IS_ERR(top.session)) {
1753 status = PTR_ERR(top.session);
1754 goto out_delete_evlist;
1757 #ifdef HAVE_LIBBPF_SUPPORT
1758 if (!top.record_opts.no_bpf_event) {
1759 top.sb_evlist = evlist__new();
1761 if (top.sb_evlist == NULL) {
1762 pr_err("Couldn't create side band evlist.\n.");
1764 goto out_delete_evlist;
1767 if (evlist__add_bpf_sb_event(top.sb_evlist, &perf_env)) {
1768 pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");
1770 goto out_delete_evlist;
1775 if (evlist__start_sb_thread(top.sb_evlist, target)) {
1776 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
1777 opts->no_bpf_event = true;
1780 status = __cmd_top(&top);
1782 if (!opts->no_bpf_event)
1783 evlist__stop_sb_thread(top.sb_evlist);
1786 evlist__delete(top.evlist);
1787 perf_session__delete(top.session);