4 * Builtin top command: Display a continuously updated profile of
5 * any workload, CPU or specific PID.
7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
8 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
10 * Improvements and fixes by:
12 * Arjan van de Ven <arjan@linux.intel.com>
13 * Yanmin Zhang <yanmin.zhang@intel.com>
14 * Wu Fengguang <fengguang.wu@intel.com>
15 * Mike Galbraith <efault@gmx.de>
16 * Paul Mackerras <paulus@samba.org>
18 * Released under the GPL v2. (and only v2, not any later version)
24 #include "util/annotate.h"
25 #include "util/cache.h"
26 #include "util/color.h"
27 #include "util/evlist.h"
28 #include "util/evsel.h"
29 #include "util/session.h"
30 #include "util/symbol.h"
31 #include "util/thread.h"
32 #include "util/thread_map.h"
34 #include "util/util.h"
35 #include <linux/rbtree.h>
36 #include "util/parse-options.h"
37 #include "util/parse-events.h"
38 #include "util/cpumap.h"
39 #include "util/xyarray.h"
40 #include "util/sort.h"
42 #include "util/debug.h"
56 #include <sys/syscall.h>
57 #include <sys/ioctl.h>
59 #include <sys/prctl.h>
64 #include <linux/unistd.h>
65 #include <linux/types.h>
68 void get_term_dimensions(struct winsize *ws)
70 char *s = getenv("LINES");
74 s = getenv("COLUMNS");
77 if (ws->ws_row && ws->ws_col)
82 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
83 ws->ws_row && ws->ws_col)
90 static void perf_top__update_print_entries(struct perf_top *top)
92 top->print_entries = top->winsize.ws_row;
94 if (top->print_entries > 9)
95 top->print_entries -= 9;
98 static void perf_top__sig_winch(int sig __used, siginfo_t *info __used, void *arg)
100 struct perf_top *top = arg;
102 get_term_dimensions(&top->winsize);
103 perf_top__update_print_entries(top);
106 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
109 struct annotation *notes;
113 if (!he || !he->ms.sym)
120 * We can't annotate with just /proc/kallsyms
122 if (map->dso->symtab_type == SYMTAB__KALLSYMS) {
123 pr_err("Can't annotate %s: No vmlinux file was found in the "
124 "path\n", sym->name);
129 notes = symbol__annotation(sym);
130 if (notes->src != NULL) {
131 pthread_mutex_lock(¬es->lock);
135 pthread_mutex_lock(¬es->lock);
137 if (symbol__alloc_hist(sym) < 0) {
138 pthread_mutex_unlock(¬es->lock);
139 pr_err("Not enough memory for annotating '%s' symbol!\n",
145 err = symbol__annotate(sym, map, 0);
148 top->sym_filter_entry = he;
151 pthread_mutex_unlock(¬es->lock);
155 static void __zero_source_counters(struct hist_entry *he)
157 struct symbol *sym = he->ms.sym;
158 symbol__annotate_zero_histograms(sym);
161 static void perf_top__record_precise_ip(struct perf_top *top,
162 struct hist_entry *he,
165 struct annotation *notes;
168 if (he == NULL || he->ms.sym == NULL ||
169 ((top->sym_filter_entry == NULL ||
170 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
174 notes = symbol__annotation(sym);
176 if (pthread_mutex_trylock(¬es->lock))
179 if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
180 pthread_mutex_unlock(¬es->lock);
181 pr_err("Not enough memory for annotating '%s' symbol!\n",
187 ip = he->ms.map->map_ip(he->ms.map, ip);
188 symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
190 pthread_mutex_unlock(¬es->lock);
193 static void perf_top__show_details(struct perf_top *top)
195 struct hist_entry *he = top->sym_filter_entry;
196 struct annotation *notes;
197 struct symbol *symbol;
204 notes = symbol__annotation(symbol);
206 pthread_mutex_lock(¬es->lock);
208 if (notes->src == NULL)
211 printf("Showing %s for %s\n", event_name(top->sym_evsel), symbol->name);
212 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
214 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
215 0, top->sym_pcnt_filter, top->print_entries, 4);
217 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
219 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
221 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
223 pthread_mutex_unlock(¬es->lock);
226 static const char CONSOLE_CLEAR[] = "
\e[H
\e[2J";
228 static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
229 struct addr_location *al,
230 struct perf_sample *sample)
232 struct hist_entry *he;
234 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
238 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
242 static void perf_top__print_sym_table(struct perf_top *top)
246 const int win_width = top->winsize.ws_col - 1;
250 perf_top__header_snprintf(top, bf, sizeof(bf));
253 perf_top__reset_sample_counters(top);
255 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
257 if (top->sym_evsel->hists.stats.nr_lost_warned !=
258 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
259 top->sym_evsel->hists.stats.nr_lost_warned =
260 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
261 color_fprintf(stdout, PERF_COLOR_RED,
262 "WARNING: LOST %d chunks, Check IO/CPU overload",
263 top->sym_evsel->hists.stats.nr_lost_warned);
267 if (top->sym_filter_entry) {
268 perf_top__show_details(top);
272 hists__collapse_resort_threaded(&top->sym_evsel->hists);
273 hists__output_resort_threaded(&top->sym_evsel->hists);
274 hists__decay_entries_threaded(&top->sym_evsel->hists,
275 top->hide_user_symbols,
276 top->hide_kernel_symbols);
277 hists__output_recalc_col_len(&top->sym_evsel->hists,
278 top->winsize.ws_row - 3);
280 hists__fprintf(&top->sym_evsel->hists, NULL, false, false,
281 top->winsize.ws_row - 4 - printed, win_width, stdout);
284 static void prompt_integer(int *target, const char *msg)
286 char *buf = malloc(0), *p;
290 fprintf(stdout, "\n%s: ", msg);
291 if (getline(&buf, &dummy, stdin) < 0)
294 p = strchr(buf, '\n');
304 tmp = strtoul(buf, NULL, 10);
310 static void prompt_percent(int *target, const char *msg)
314 prompt_integer(&tmp, msg);
315 if (tmp >= 0 && tmp <= 100)
319 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
321 char *buf = malloc(0), *p;
322 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
323 struct rb_node *next;
326 /* zero counters of active symbol */
328 __zero_source_counters(syme);
329 top->sym_filter_entry = NULL;
332 fprintf(stdout, "\n%s: ", msg);
333 if (getline(&buf, &dummy, stdin) < 0)
336 p = strchr(buf, '\n');
340 next = rb_first(&top->sym_evsel->hists.entries);
342 n = rb_entry(next, struct hist_entry, rb_node);
343 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
347 next = rb_next(&n->rb_node);
351 fprintf(stderr, "Sorry, %s is not active.\n", buf);
354 perf_top__parse_source(top, found);
360 static void perf_top__print_mapped_keys(struct perf_top *top)
364 if (top->sym_filter_entry) {
365 struct symbol *sym = top->sym_filter_entry->ms.sym;
369 fprintf(stdout, "\nMapped keys:\n");
370 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
371 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
373 if (top->evlist->nr_entries > 1)
374 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top->sym_evsel));
376 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
378 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
379 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
380 fprintf(stdout, "\t[S] stop annotation.\n");
383 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
384 top->hide_kernel_symbols ? "yes" : "no");
386 "\t[U] hide user symbols. \t(%s)\n",
387 top->hide_user_symbols ? "yes" : "no");
388 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
389 fprintf(stdout, "\t[qQ] quit.\n");
392 static int perf_top__key_mapped(struct perf_top *top, int c)
408 return top->evlist->nr_entries > 1 ? 1 : 0;
416 static void perf_top__handle_keypress(struct perf_top *top, int c)
418 if (!perf_top__key_mapped(top, c)) {
419 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
420 struct termios tc, save;
422 perf_top__print_mapped_keys(top);
423 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
428 tc.c_lflag &= ~(ICANON | ECHO);
431 tcsetattr(0, TCSANOW, &tc);
433 poll(&stdin_poll, 1, -1);
436 tcsetattr(0, TCSAFLUSH, &save);
437 if (!perf_top__key_mapped(top, c))
443 prompt_integer(&top->delay_secs, "Enter display delay");
444 if (top->delay_secs < 1)
448 prompt_integer(&top->print_entries, "Enter display entries (lines)");
449 if (top->print_entries == 0) {
450 struct sigaction act = {
451 .sa_sigaction = perf_top__sig_winch,
452 .sa_flags = SA_SIGINFO,
454 perf_top__sig_winch(SIGWINCH, NULL, top);
455 sigaction(SIGWINCH, &act, NULL);
457 signal(SIGWINCH, SIG_DFL);
460 if (top->evlist->nr_entries > 1) {
461 /* Select 0 as the default event: */
464 fprintf(stderr, "\nAvailable events:");
466 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
467 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, event_name(top->sym_evsel));
469 prompt_integer(&counter, "Enter details event counter");
471 if (counter >= top->evlist->nr_entries) {
472 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
473 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top->sym_evsel));
477 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
478 if (top->sym_evsel->idx == counter)
481 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
484 prompt_integer(&top->count_filter, "Enter display event count filter");
487 prompt_percent(&top->sym_pcnt_filter,
488 "Enter details display event filter (percent)");
491 top->hide_kernel_symbols = !top->hide_kernel_symbols;
495 printf("exiting.\n");
496 if (top->dump_symtab)
497 perf_session__fprintf_dsos(top->session, stderr);
500 perf_top__prompt_symbol(top, "Enter details symbol");
503 if (!top->sym_filter_entry)
506 struct hist_entry *syme = top->sym_filter_entry;
508 top->sym_filter_entry = NULL;
509 __zero_source_counters(syme);
513 top->hide_user_symbols = !top->hide_user_symbols;
516 top->zero = !top->zero;
523 static void perf_top__sort_new_samples(void *arg)
525 struct perf_top *t = arg;
526 perf_top__reset_sample_counters(t);
528 if (t->evlist->selected != NULL)
529 t->sym_evsel = t->evlist->selected;
531 hists__collapse_resort_threaded(&t->sym_evsel->hists);
532 hists__output_resort_threaded(&t->sym_evsel->hists);
533 hists__decay_entries_threaded(&t->sym_evsel->hists,
534 t->hide_user_symbols,
535 t->hide_kernel_symbols);
538 static void *display_thread_tui(void *arg)
540 struct perf_top *top = arg;
541 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
543 perf_top__sort_new_samples(top);
544 perf_evlist__tui_browse_hists(top->evlist, help,
545 perf_top__sort_new_samples,
546 top, top->delay_secs);
553 static void *display_thread(void *arg)
555 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
556 struct termios tc, save;
557 struct perf_top *top = arg;
562 tc.c_lflag &= ~(ICANON | ECHO);
566 pthread__unblock_sigwinch();
568 delay_msecs = top->delay_secs * 1000;
569 tcsetattr(0, TCSANOW, &tc);
574 perf_top__print_sym_table(top);
576 * Either timeout expired or we got an EINTR due to SIGWINCH,
577 * refresh screen in both cases.
579 switch (poll(&stdin_poll, 1, delay_msecs)) {
592 tcsetattr(0, TCSAFLUSH, &save);
594 perf_top__handle_keypress(top, c);
600 /* Tag samples to be skipped. */
601 static const char *skip_symbols[] = {
608 "mwait_idle_with_hints",
610 "ppc64_runlatch_off",
611 "pseries_dedicated_idle_sleep",
615 static int symbol_filter(struct map *map __used, struct symbol *sym)
617 const char *name = sym->name;
621 * ppc64 uses function descriptors and appends a '.' to the
622 * start of every instruction address. Remove it.
627 if (!strcmp(name, "_text") ||
628 !strcmp(name, "_etext") ||
629 !strcmp(name, "_sinittext") ||
630 !strncmp("init_module", name, 11) ||
631 !strncmp("cleanup_module", name, 14) ||
632 strstr(name, "_text_start") ||
633 strstr(name, "_text_end"))
636 for (i = 0; skip_symbols[i]; i++) {
637 if (!strcmp(skip_symbols[i], name)) {
646 static void perf_event__process_sample(struct perf_tool *tool,
647 const union perf_event *event,
648 struct perf_evsel *evsel,
649 struct perf_sample *sample,
650 struct machine *machine)
652 struct perf_top *top = container_of(tool, struct perf_top, tool);
653 struct symbol *parent = NULL;
654 u64 ip = event->ip.ip;
655 struct addr_location al;
658 if (!machine && perf_guest) {
659 pr_err("Can't find guest [%d]'s kernel information\n",
664 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
665 top->exact_samples++;
667 if (perf_event__preprocess_sample(event, machine, &al, sample,
668 symbol_filter) < 0 ||
672 if (!top->kptr_restrict_warned &&
673 symbol_conf.kptr_restrict &&
674 al.cpumode == PERF_RECORD_MISC_KERNEL) {
676 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
677 "Check /proc/sys/kernel/kptr_restrict.\n\n"
678 "Kernel%s samples will not be resolved.\n",
679 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
681 if (use_browser <= 0)
683 top->kptr_restrict_warned = true;
686 if (al.sym == NULL) {
687 const char *msg = "Kernel samples will not be resolved.\n";
689 * As we do lazy loading of symtabs we only will know if the
690 * specified vmlinux file is invalid when we actually have a
691 * hit in kernel space and then try to load it. So if we get
692 * here and there are _no_ symbols in the DSO backing the
693 * kernel map, bail out.
695 * We may never get here, for instance, if we use -K/
696 * --hide-kernel-symbols, even if the user specifies an
697 * invalid --vmlinux ;-)
699 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
700 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
701 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
702 if (symbol_conf.vmlinux_name) {
703 ui__warning("The %s file can't be used.\n%s",
704 symbol_conf.vmlinux_name, msg);
706 ui__warning("A vmlinux file was not found.\n%s",
710 if (use_browser <= 0)
712 top->vmlinux_warned = true;
716 if (al.sym == NULL || !al.sym->ignore) {
717 struct hist_entry *he;
719 if ((sort__has_parent || symbol_conf.use_callchain) &&
721 err = machine__resolve_callchain(machine, evsel, al.thread,
722 sample->callchain, &parent);
727 he = perf_evsel__add_hist_entry(evsel, &al, sample);
729 pr_err("Problem incrementing symbol period, skipping event\n");
733 if (symbol_conf.use_callchain) {
734 err = callchain_append(he->callchain, &evsel->hists.callchain_cursor,
740 if (top->sort_has_symbols)
741 perf_top__record_precise_ip(top, he, evsel->idx, ip);
747 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
749 struct perf_sample sample;
750 struct perf_evsel *evsel;
751 struct perf_session *session = top->session;
752 union perf_event *event;
753 struct machine *machine;
757 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
758 ret = perf_session__parse_sample(session, event, &sample);
760 pr_err("Can't parse sample, err = %d\n", ret);
764 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
765 assert(evsel != NULL);
767 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
769 if (event->header.type == PERF_RECORD_SAMPLE)
773 case PERF_RECORD_MISC_USER:
775 if (top->hide_user_symbols)
777 machine = perf_session__find_host_machine(session);
779 case PERF_RECORD_MISC_KERNEL:
780 ++top->kernel_samples;
781 if (top->hide_kernel_symbols)
783 machine = perf_session__find_host_machine(session);
785 case PERF_RECORD_MISC_GUEST_KERNEL:
786 ++top->guest_kernel_samples;
787 machine = perf_session__find_machine(session, event->ip.pid);
789 case PERF_RECORD_MISC_GUEST_USER:
790 ++top->guest_us_samples;
792 * TODO: we don't process guest user from host side
793 * except simple counting.
801 if (event->header.type == PERF_RECORD_SAMPLE) {
802 perf_event__process_sample(&top->tool, event, evsel,
804 } else if (event->header.type < PERF_RECORD_MAX) {
805 hists__inc_nr_events(&evsel->hists, event->header.type);
806 perf_event__process(&top->tool, event, &sample, machine);
808 ++session->hists.stats.nr_unknown_events;
812 static void perf_top__mmap_read(struct perf_top *top)
816 for (i = 0; i < top->evlist->nr_mmaps; i++)
817 perf_top__mmap_read_idx(top, i);
820 static void perf_top__start_counters(struct perf_top *top)
822 struct perf_evsel *counter, *first;
823 struct perf_evlist *evlist = top->evlist;
825 first = list_entry(evlist->entries.next, struct perf_evsel, node);
827 list_for_each_entry(counter, &evlist->entries, node) {
828 struct perf_event_attr *attr = &counter->attr;
829 struct xyarray *group_fd = NULL;
831 if (top->group && counter != first)
832 group_fd = first->fd;
834 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
837 attr->sample_type |= PERF_SAMPLE_PERIOD;
839 attr->sample_freq = top->freq;
842 if (evlist->nr_entries > 1) {
843 attr->sample_type |= PERF_SAMPLE_ID;
844 attr->read_format |= PERF_FORMAT_ID;
847 if (symbol_conf.use_callchain)
848 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
852 attr->inherit = top->inherit;
854 attr->sample_id_all = top->sample_id_all_avail ? 1 : 0;
856 if (perf_evsel__open(counter, top->evlist->cpus,
857 top->evlist->threads, top->group,
861 if (err == EPERM || err == EACCES) {
862 ui__error_paranoid();
864 } else if (err == EINVAL && top->sample_id_all_avail) {
866 * Old kernel, no attr->sample_id_type_all field
868 top->sample_id_all_avail = false;
869 goto retry_sample_id;
872 * If it's cycles then fall back to hrtimer
873 * based cpu-clock-tick sw counter, which
874 * is always available even if no PMU support:
876 if (attr->type == PERF_TYPE_HARDWARE &&
877 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
879 ui__warning("Cycles event not supported,\n"
880 "trying to fall back to cpu-clock-ticks\n");
882 attr->type = PERF_TYPE_SOFTWARE;
883 attr->config = PERF_COUNT_SW_CPU_CLOCK;
888 ui__warning("The %s event is not supported.\n",
889 event_name(counter));
891 } else if (err == EMFILE) {
892 ui__warning("Too many events are opened.\n"
893 "Try again after reducing the number of events\n");
897 ui__warning("The sys_perf_event_open() syscall "
898 "returned with %d (%s). /bin/dmesg "
899 "may provide additional information.\n"
900 "No CONFIG_PERF_EVENTS=y kernel support "
901 "configured?\n", err, strerror(err));
906 if (perf_evlist__mmap(evlist, top->mmap_pages, false) < 0) {
907 ui__warning("Failed to mmap with %d (%s)\n",
908 errno, strerror(errno));
919 static int perf_top__setup_sample_type(struct perf_top *top)
921 if (!top->sort_has_symbols) {
922 if (symbol_conf.use_callchain) {
923 ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
926 } else if (!top->dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
927 if (callchain_register_param(&callchain_param) < 0) {
928 ui__warning("Can't register callchain params.\n");
936 static int __cmd_top(struct perf_top *top)
941 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
942 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
944 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
945 if (top->session == NULL)
948 ret = perf_top__setup_sample_type(top);
952 if (top->target_tid != -1)
953 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
955 &top->session->host_machine);
957 perf_event__synthesize_threads(&top->tool, perf_event__process,
958 &top->session->host_machine);
959 perf_top__start_counters(top);
960 top->session->evlist = top->evlist;
961 perf_session__update_sample_type(top->session);
963 /* Wait for a minimal set of events before starting the snapshot */
964 poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
966 perf_top__mmap_read(top);
968 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
969 display_thread), top)) {
970 printf("Could not create display thread.\n");
974 if (top->realtime_prio) {
975 struct sched_param param;
977 param.sched_priority = top->realtime_prio;
978 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
979 printf("Could not set realtime priority.\n");
985 u64 hits = top->samples;
987 perf_top__mmap_read(top);
989 if (hits == top->samples)
990 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
994 perf_session__delete(top->session);
1001 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1003 struct perf_top *top = (struct perf_top *)opt->value;
1011 top->dont_use_callchains = true;
1015 symbol_conf.use_callchain = true;
1020 tok = strtok((char *)arg, ",");
1024 /* get the output mode */
1025 if (!strncmp(tok, "graph", strlen(arg)))
1026 callchain_param.mode = CHAIN_GRAPH_ABS;
1028 else if (!strncmp(tok, "flat", strlen(arg)))
1029 callchain_param.mode = CHAIN_FLAT;
1031 else if (!strncmp(tok, "fractal", strlen(arg)))
1032 callchain_param.mode = CHAIN_GRAPH_REL;
1034 else if (!strncmp(tok, "none", strlen(arg))) {
1035 callchain_param.mode = CHAIN_NONE;
1036 symbol_conf.use_callchain = false;
1042 /* get the min percentage */
1043 tok = strtok(NULL, ",");
1047 callchain_param.min_percent = strtod(tok, &endptr);
1051 /* get the print limit */
1052 tok2 = strtok(NULL, ",");
1056 if (tok2[0] != 'c') {
1057 callchain_param.print_limit = strtod(tok2, &endptr);
1058 tok2 = strtok(NULL, ",");
1063 /* get the call chain order */
1064 if (!strcmp(tok2, "caller"))
1065 callchain_param.order = ORDER_CALLER;
1066 else if (!strcmp(tok2, "callee"))
1067 callchain_param.order = ORDER_CALLEE;
1071 if (callchain_register_param(&callchain_param) < 0) {
1072 fprintf(stderr, "Can't register callchain params\n");
1078 static const char * const top_usage[] = {
1079 "perf top [<options>]",
1083 int cmd_top(int argc, const char **argv, const char *prefix __used)
1085 struct perf_evsel *pos;
1086 int status = -ENOMEM;
1087 struct perf_top top = {
1092 .freq = 1000, /* 1 KHz */
1093 .sample_id_all_avail = true,
1095 .sym_pcnt_filter = 5,
1097 char callchain_default_opt[] = "fractal,0.5,callee";
1098 const struct option options[] = {
1099 OPT_CALLBACK('e', "event", &top.evlist, "event",
1100 "event selector. use 'perf list' to list available events",
1101 parse_events_option),
1102 OPT_INTEGER('c', "count", &top.default_interval,
1103 "event period to sample"),
1104 OPT_INTEGER('p', "pid", &top.target_pid,
1105 "profile events on existing process id"),
1106 OPT_INTEGER('t', "tid", &top.target_tid,
1107 "profile events on existing thread id"),
1108 OPT_BOOLEAN('a', "all-cpus", &top.system_wide,
1109 "system-wide collection from all CPUs"),
1110 OPT_STRING('C', "cpu", &top.cpu_list, "cpu",
1111 "list of cpus to monitor"),
1112 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1113 "file", "vmlinux pathname"),
1114 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1115 "hide kernel symbols"),
1116 OPT_UINTEGER('m', "mmap-pages", &top.mmap_pages, "number of mmap data pages"),
1117 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1118 "collect data with this RT SCHED_FIFO priority"),
1119 OPT_INTEGER('d', "delay", &top.delay_secs,
1120 "number of seconds to delay between refreshes"),
1121 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1122 "dump the symbol table used for profiling"),
1123 OPT_INTEGER('f', "count-filter", &top.count_filter,
1124 "only display functions with more events than this"),
1125 OPT_BOOLEAN('g', "group", &top.group,
1126 "put the counters into a counter group"),
1127 OPT_BOOLEAN('i', "inherit", &top.inherit,
1128 "child tasks inherit counters"),
1129 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1130 "symbol to annotate"),
1131 OPT_BOOLEAN('z', "zero", &top.zero,
1132 "zero history across updates"),
1133 OPT_INTEGER('F', "freq", &top.freq,
1134 "profile at this frequency"),
1135 OPT_INTEGER('E', "entries", &top.print_entries,
1136 "display this many functions"),
1137 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1138 "hide user symbols"),
1139 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1140 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1141 OPT_INCR('v', "verbose", &verbose,
1142 "be more verbose (show counter open errors, etc)"),
1143 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1144 "sort by key(s): pid, comm, dso, symbol, parent"),
1145 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1146 "Show a column with the number of samples"),
1147 OPT_CALLBACK_DEFAULT('G', "call-graph", &top, "output_type,min_percent, call_order",
1148 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1149 "Default: fractal,0.5,callee", &parse_callchain_opt,
1150 callchain_default_opt),
1151 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1152 "Show a column with the sum of periods"),
1153 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1154 "only consider symbols in these dsos"),
1155 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1156 "only consider symbols in these comms"),
1157 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1158 "only consider these symbols"),
1159 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1160 "Interleave source code with assembly code (default)"),
1161 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1162 "Display raw encoding of assembly instructions (default)"),
1163 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1164 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1168 top.evlist = perf_evlist__new(NULL, NULL);
1169 if (top.evlist == NULL)
1172 symbol_conf.exclude_other = false;
1174 argc = parse_options(argc, argv, options, top_usage, 0);
1176 usage_with_options(top_usage, options);
1178 if (sort_order == default_sort_order)
1179 sort_order = "dso,symbol";
1181 setup_sorting(top_usage, options);
1185 else if (top.use_tui)
1188 setup_browser(false);
1190 /* CPU and PID are mutually exclusive */
1191 if (top.target_tid > 0 && top.cpu_list) {
1192 printf("WARNING: PID switch overriding CPU\n");
1194 top.cpu_list = NULL;
1197 if (top.target_pid != -1)
1198 top.target_tid = top.target_pid;
1200 if (perf_evlist__create_maps(top.evlist, top.target_pid,
1201 top.target_tid, top.cpu_list) < 0)
1202 usage_with_options(top_usage, options);
1204 if (!top.evlist->nr_entries &&
1205 perf_evlist__add_default(top.evlist) < 0) {
1206 pr_err("Not enough memory for event selector list\n");
1210 symbol_conf.nr_events = top.evlist->nr_entries;
1212 if (top.delay_secs < 1)
1216 * User specified count overrides default frequency.
1218 if (top.default_interval)
1220 else if (top.freq) {
1221 top.default_interval = top.freq;
1223 fprintf(stderr, "frequency and count are zero, aborting\n");
1227 list_for_each_entry(pos, &top.evlist->entries, node) {
1229 * Fill in the ones not specifically initialized via -c:
1231 if (!pos->attr.sample_period)
1232 pos->attr.sample_period = top.default_interval;
1235 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1237 symbol_conf.priv_size = sizeof(struct annotation);
1239 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1240 if (symbol__init() < 0)
1243 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1244 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1245 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1248 * Avoid annotation data structures overhead when symbols aren't on the
1251 top.sort_has_symbols = sort_sym.list.next != NULL;
1253 get_term_dimensions(&top.winsize);
1254 if (top.print_entries == 0) {
1255 struct sigaction act = {
1256 .sa_sigaction = perf_top__sig_winch,
1257 .sa_flags = SA_SIGINFO,
1259 perf_top__update_print_entries(&top);
1260 sigaction(SIGWINCH, &act, NULL);
1263 status = __cmd_top(&top);
1265 perf_evlist__delete(top.evlist);