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>
67 static struct perf_top top = {
72 .freq = 1000, /* 1 KHz */
75 static bool system_wide = false;
77 static bool use_tui, use_stdio;
79 static bool sort_has_symbols;
81 static bool dont_use_callchains;
82 static char callchain_default_opt[] = "fractal,0.5,callee";
85 static int default_interval = 0;
87 static bool kptr_restrict_warned;
88 static bool vmlinux_warned;
89 static bool inherit = false;
90 static int realtime_prio = 0;
91 static bool group = false;
92 static bool sample_id_all_avail = true;
93 static unsigned int mmap_pages = 128;
95 static bool dump_symtab = false;
97 static struct winsize winsize;
99 static const char *sym_filter = NULL;
100 static int sym_pcnt_filter = 5;
106 void get_term_dimensions(struct winsize *ws)
108 char *s = getenv("LINES");
111 ws->ws_row = atoi(s);
112 s = getenv("COLUMNS");
114 ws->ws_col = atoi(s);
115 if (ws->ws_row && ws->ws_col)
120 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
121 ws->ws_row && ws->ws_col)
128 static void update_print_entries(struct winsize *ws)
130 top.print_entries = ws->ws_row;
132 if (top.print_entries > 9)
133 top.print_entries -= 9;
136 static void sig_winch_handler(int sig __used)
138 get_term_dimensions(&winsize);
139 update_print_entries(&winsize);
142 static int parse_source(struct hist_entry *he)
145 struct annotation *notes;
149 if (!he || !he->ms.sym)
156 * We can't annotate with just /proc/kallsyms
158 if (map->dso->symtab_type == SYMTAB__KALLSYMS) {
159 pr_err("Can't annotate %s: No vmlinux file was found in the "
160 "path\n", sym->name);
165 notes = symbol__annotation(sym);
166 if (notes->src != NULL) {
167 pthread_mutex_lock(¬es->lock);
171 pthread_mutex_lock(¬es->lock);
173 if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
174 pthread_mutex_unlock(¬es->lock);
175 pr_err("Not enough memory for annotating '%s' symbol!\n",
181 err = symbol__annotate(sym, map, 0);
184 top.sym_filter_entry = he;
187 pthread_mutex_unlock(¬es->lock);
191 static void __zero_source_counters(struct hist_entry *he)
193 struct symbol *sym = he->ms.sym;
194 symbol__annotate_zero_histograms(sym);
197 static void record_precise_ip(struct hist_entry *he, int counter, u64 ip)
199 struct annotation *notes;
202 if (he == NULL || he->ms.sym == NULL ||
203 ((top.sym_filter_entry == NULL ||
204 top.sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
208 notes = symbol__annotation(sym);
210 if (pthread_mutex_trylock(¬es->lock))
213 if (notes->src == NULL &&
214 symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
215 pthread_mutex_unlock(¬es->lock);
216 pr_err("Not enough memory for annotating '%s' symbol!\n",
222 ip = he->ms.map->map_ip(he->ms.map, ip);
223 symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
225 pthread_mutex_unlock(¬es->lock);
228 static void show_details(struct hist_entry *he)
230 struct annotation *notes;
231 struct symbol *symbol;
238 notes = symbol__annotation(symbol);
240 pthread_mutex_lock(¬es->lock);
242 if (notes->src == NULL)
245 printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
246 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
248 more = symbol__annotate_printf(symbol, he->ms.map, top.sym_evsel->idx,
249 0, sym_pcnt_filter, top.print_entries, 4);
251 symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
253 symbol__annotate_decay_histogram(symbol, top.sym_evsel->idx);
255 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
257 pthread_mutex_unlock(¬es->lock);
260 static const char CONSOLE_CLEAR[] = "
\e[H
\e[2J";
262 static struct hist_entry *
263 perf_session__add_hist_entry(struct perf_session *session,
264 struct addr_location *al,
265 struct perf_sample *sample,
266 struct perf_evsel *evsel)
268 struct hist_entry *he;
270 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
274 session->hists.stats.total_period += sample->period;
275 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
279 static void print_sym_table(void)
283 const int win_width = winsize.ws_col - 1;
287 perf_top__header_snprintf(&top, bf, sizeof(bf));
290 perf_top__reset_sample_counters(&top);
292 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
294 if (top.sym_evsel->hists.stats.nr_lost_warned !=
295 top.sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
296 top.sym_evsel->hists.stats.nr_lost_warned =
297 top.sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
298 color_fprintf(stdout, PERF_COLOR_RED,
299 "WARNING: LOST %d chunks, Check IO/CPU overload",
300 top.sym_evsel->hists.stats.nr_lost_warned);
304 if (top.sym_filter_entry) {
305 show_details(top.sym_filter_entry);
309 hists__collapse_resort_threaded(&top.sym_evsel->hists);
310 hists__output_resort_threaded(&top.sym_evsel->hists);
311 hists__decay_entries_threaded(&top.sym_evsel->hists,
312 top.hide_user_symbols,
313 top.hide_kernel_symbols);
314 hists__output_recalc_col_len(&top.sym_evsel->hists, winsize.ws_row - 3);
316 hists__fprintf(&top.sym_evsel->hists, NULL, false, false,
317 winsize.ws_row - 4 - printed, win_width, stdout);
320 static void prompt_integer(int *target, const char *msg)
322 char *buf = malloc(0), *p;
326 fprintf(stdout, "\n%s: ", msg);
327 if (getline(&buf, &dummy, stdin) < 0)
330 p = strchr(buf, '\n');
340 tmp = strtoul(buf, NULL, 10);
346 static void prompt_percent(int *target, const char *msg)
350 prompt_integer(&tmp, msg);
351 if (tmp >= 0 && tmp <= 100)
355 static void prompt_symbol(struct hist_entry **target, const char *msg)
357 char *buf = malloc(0), *p;
358 struct hist_entry *syme = *target, *n, *found = NULL;
359 struct rb_node *next;
362 /* zero counters of active symbol */
364 __zero_source_counters(syme);
368 fprintf(stdout, "\n%s: ", msg);
369 if (getline(&buf, &dummy, stdin) < 0)
372 p = strchr(buf, '\n');
376 next = rb_first(&top.sym_evsel->hists.entries);
378 n = rb_entry(next, struct hist_entry, rb_node);
379 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
383 next = rb_next(&n->rb_node);
387 fprintf(stderr, "Sorry, %s is not active.\n", buf);
397 static void print_mapped_keys(void)
401 if (top.sym_filter_entry) {
402 struct symbol *sym = top.sym_filter_entry->ms.sym;
406 fprintf(stdout, "\nMapped keys:\n");
407 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top.delay_secs);
408 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top.print_entries);
410 if (top.evlist->nr_entries > 1)
411 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top.sym_evsel));
413 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top.count_filter);
415 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
416 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
417 fprintf(stdout, "\t[S] stop annotation.\n");
420 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
421 top.hide_kernel_symbols ? "yes" : "no");
423 "\t[U] hide user symbols. \t(%s)\n",
424 top.hide_user_symbols ? "yes" : "no");
425 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top.zero ? 1 : 0);
426 fprintf(stdout, "\t[qQ] quit.\n");
429 static int key_mapped(int c)
445 return top.evlist->nr_entries > 1 ? 1 : 0;
453 static void handle_keypress(int c)
455 if (!key_mapped(c)) {
456 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
457 struct termios tc, save;
460 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
465 tc.c_lflag &= ~(ICANON | ECHO);
468 tcsetattr(0, TCSANOW, &tc);
470 poll(&stdin_poll, 1, -1);
473 tcsetattr(0, TCSAFLUSH, &save);
480 prompt_integer(&top.delay_secs, "Enter display delay");
481 if (top.delay_secs < 1)
485 prompt_integer(&top.print_entries, "Enter display entries (lines)");
486 if (top.print_entries == 0) {
487 sig_winch_handler(SIGWINCH);
488 signal(SIGWINCH, sig_winch_handler);
490 signal(SIGWINCH, SIG_DFL);
493 if (top.evlist->nr_entries > 1) {
494 /* Select 0 as the default event: */
497 fprintf(stderr, "\nAvailable events:");
499 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
500 fprintf(stderr, "\n\t%d %s", top.sym_evsel->idx, event_name(top.sym_evsel));
502 prompt_integer(&counter, "Enter details event counter");
504 if (counter >= top.evlist->nr_entries) {
505 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
506 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top.sym_evsel));
510 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
511 if (top.sym_evsel->idx == counter)
514 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
517 prompt_integer(&top.count_filter, "Enter display event count filter");
520 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
523 top.hide_kernel_symbols = !top.hide_kernel_symbols;
527 printf("exiting.\n");
529 perf_session__fprintf_dsos(top.session, stderr);
532 prompt_symbol(&top.sym_filter_entry, "Enter details symbol");
535 if (!top.sym_filter_entry)
538 struct hist_entry *syme = top.sym_filter_entry;
540 top.sym_filter_entry = NULL;
541 __zero_source_counters(syme);
545 top.hide_user_symbols = !top.hide_user_symbols;
548 top.zero = !top.zero;
555 static void perf_top__sort_new_samples(void *arg)
557 struct perf_top *t = arg;
558 perf_top__reset_sample_counters(t);
560 if (t->evlist->selected != NULL)
561 t->sym_evsel = t->evlist->selected;
563 hists__collapse_resort_threaded(&t->sym_evsel->hists);
564 hists__output_resort_threaded(&t->sym_evsel->hists);
565 hists__decay_entries_threaded(&t->sym_evsel->hists,
566 top.hide_user_symbols,
567 top.hide_kernel_symbols);
570 static void *display_thread_tui(void *arg __used)
572 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
574 perf_top__sort_new_samples(&top);
575 perf_evlist__tui_browse_hists(top.evlist, help,
576 perf_top__sort_new_samples,
577 &top, top.delay_secs);
584 static void *display_thread(void *arg __used)
586 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
587 struct termios tc, save;
592 tc.c_lflag &= ~(ICANON | ECHO);
596 pthread__unblock_sigwinch();
598 delay_msecs = top.delay_secs * 1000;
599 tcsetattr(0, TCSANOW, &tc);
606 * Either timeout expired or we got an EINTR due to SIGWINCH,
607 * refresh screen in both cases.
609 switch (poll(&stdin_poll, 1, delay_msecs)) {
622 tcsetattr(0, TCSAFLUSH, &save);
630 /* Tag samples to be skipped. */
631 static const char *skip_symbols[] = {
638 "mwait_idle_with_hints",
640 "ppc64_runlatch_off",
641 "pseries_dedicated_idle_sleep",
645 static int symbol_filter(struct map *map __used, struct symbol *sym)
647 const char *name = sym->name;
651 * ppc64 uses function descriptors and appends a '.' to the
652 * start of every instruction address. Remove it.
657 if (!strcmp(name, "_text") ||
658 !strcmp(name, "_etext") ||
659 !strcmp(name, "_sinittext") ||
660 !strncmp("init_module", name, 11) ||
661 !strncmp("cleanup_module", name, 14) ||
662 strstr(name, "_text_start") ||
663 strstr(name, "_text_end"))
666 for (i = 0; skip_symbols[i]; i++) {
667 if (!strcmp(skip_symbols[i], name)) {
676 static void perf_event__process_sample(const union perf_event *event,
677 struct perf_evsel *evsel,
678 struct perf_sample *sample,
679 struct perf_session *session)
681 struct symbol *parent = NULL;
682 u64 ip = event->ip.ip;
683 struct addr_location al;
684 struct machine *machine;
686 u8 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
691 case PERF_RECORD_MISC_USER:
693 if (top.hide_user_symbols)
695 machine = perf_session__find_host_machine(session);
697 case PERF_RECORD_MISC_KERNEL:
698 ++top.kernel_samples;
699 if (top.hide_kernel_symbols)
701 machine = perf_session__find_host_machine(session);
703 case PERF_RECORD_MISC_GUEST_KERNEL:
704 ++top.guest_kernel_samples;
705 machine = perf_session__find_machine(session, event->ip.pid);
707 case PERF_RECORD_MISC_GUEST_USER:
708 ++top.guest_us_samples;
710 * TODO: we don't process guest user from host side
711 * except simple counting.
718 if (!machine && perf_guest) {
719 pr_err("Can't find guest [%d]'s kernel information\n",
724 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
727 if (perf_event__preprocess_sample(event, session, &al, sample,
728 symbol_filter) < 0 ||
732 if (!kptr_restrict_warned &&
733 symbol_conf.kptr_restrict &&
734 al.cpumode == PERF_RECORD_MISC_KERNEL) {
736 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
737 "Check /proc/sys/kernel/kptr_restrict.\n\n"
738 "Kernel%s samples will not be resolved.\n",
739 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
741 if (use_browser <= 0)
743 kptr_restrict_warned = true;
746 if (al.sym == NULL) {
747 const char *msg = "Kernel samples will not be resolved.\n";
749 * As we do lazy loading of symtabs we only will know if the
750 * specified vmlinux file is invalid when we actually have a
751 * hit in kernel space and then try to load it. So if we get
752 * here and there are _no_ symbols in the DSO backing the
753 * kernel map, bail out.
755 * We may never get here, for instance, if we use -K/
756 * --hide-kernel-symbols, even if the user specifies an
757 * invalid --vmlinux ;-)
759 if (!kptr_restrict_warned && !vmlinux_warned &&
760 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
761 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
762 if (symbol_conf.vmlinux_name) {
763 ui__warning("The %s file can't be used.\n%s",
764 symbol_conf.vmlinux_name, msg);
766 ui__warning("A vmlinux file was not found.\n%s",
770 if (use_browser <= 0)
772 vmlinux_warned = true;
776 if (al.sym == NULL || !al.sym->ignore) {
777 struct hist_entry *he;
779 if ((sort__has_parent || symbol_conf.use_callchain) &&
781 err = perf_session__resolve_callchain(session, al.thread,
782 sample->callchain, &parent);
787 he = perf_session__add_hist_entry(session, &al, sample, evsel);
789 pr_err("Problem incrementing symbol period, skipping event\n");
793 if (symbol_conf.use_callchain) {
794 err = callchain_append(he->callchain, &session->callchain_cursor,
800 if (sort_has_symbols)
801 record_precise_ip(he, evsel->idx, ip);
807 static void perf_session__mmap_read_idx(struct perf_session *self, int idx)
809 struct perf_sample sample;
810 struct perf_evsel *evsel;
811 union perf_event *event;
814 while ((event = perf_evlist__mmap_read(top.evlist, idx)) != NULL) {
815 ret = perf_session__parse_sample(self, event, &sample);
817 pr_err("Can't parse sample, err = %d\n", ret);
821 evsel = perf_evlist__id2evsel(self->evlist, sample.id);
822 assert(evsel != NULL);
824 if (event->header.type == PERF_RECORD_SAMPLE)
825 perf_event__process_sample(event, evsel, &sample, self);
826 else if (event->header.type < PERF_RECORD_MAX) {
827 hists__inc_nr_events(&evsel->hists, event->header.type);
828 perf_event__process(event, &sample, self);
830 ++self->hists.stats.nr_unknown_events;
834 static void perf_session__mmap_read(struct perf_session *self)
838 for (i = 0; i < top.evlist->nr_mmaps; i++)
839 perf_session__mmap_read_idx(self, i);
842 static void start_counters(struct perf_evlist *evlist)
844 struct perf_evsel *counter, *first;
846 first = list_entry(evlist->entries.next, struct perf_evsel, node);
848 list_for_each_entry(counter, &evlist->entries, node) {
849 struct perf_event_attr *attr = &counter->attr;
850 struct xyarray *group_fd = NULL;
852 if (group && counter != first)
853 group_fd = first->fd;
855 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
858 attr->sample_type |= PERF_SAMPLE_PERIOD;
860 attr->sample_freq = top.freq;
863 if (evlist->nr_entries > 1) {
864 attr->sample_type |= PERF_SAMPLE_ID;
865 attr->read_format |= PERF_FORMAT_ID;
868 if (symbol_conf.use_callchain)
869 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
873 attr->inherit = inherit;
875 attr->sample_id_all = sample_id_all_avail ? 1 : 0;
877 if (perf_evsel__open(counter, top.evlist->cpus,
878 top.evlist->threads, group,
882 if (err == EPERM || err == EACCES) {
883 ui__error_paranoid();
885 } else if (err == EINVAL && sample_id_all_avail) {
887 * Old kernel, no attr->sample_id_type_all field
889 sample_id_all_avail = false;
890 goto retry_sample_id;
893 * If it's cycles then fall back to hrtimer
894 * based cpu-clock-tick sw counter, which
895 * is always available even if no PMU support:
897 if (attr->type == PERF_TYPE_HARDWARE &&
898 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
900 ui__warning("Cycles event not supported,\n"
901 "trying to fall back to cpu-clock-ticks\n");
903 attr->type = PERF_TYPE_SOFTWARE;
904 attr->config = PERF_COUNT_SW_CPU_CLOCK;
909 ui__warning("The %s event is not supported.\n",
910 event_name(counter));
914 ui__warning("The sys_perf_event_open() syscall "
915 "returned with %d (%s). /bin/dmesg "
916 "may provide additional information.\n"
917 "No CONFIG_PERF_EVENTS=y kernel support "
918 "configured?\n", err, strerror(err));
923 if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) {
924 ui__warning("Failed to mmap with %d (%s)\n",
925 errno, strerror(errno));
936 static int setup_sample_type(void)
938 if (!sort_has_symbols) {
939 if (symbol_conf.use_callchain) {
940 ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
943 } else if (!dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
944 if (callchain_register_param(&callchain_param) < 0) {
945 ui__warning("Can't register callchain params.\n");
953 static int __cmd_top(void)
958 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
959 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
961 top.session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
962 if (top.session == NULL)
965 ret = setup_sample_type();
969 if (top.target_tid != -1)
970 perf_event__synthesize_thread_map(top.evlist->threads,
971 perf_event__process, top.session);
973 perf_event__synthesize_threads(perf_event__process, top.session);
975 start_counters(top.evlist);
976 top.session->evlist = top.evlist;
977 perf_session__update_sample_type(top.session);
979 /* Wait for a minimal set of events before starting the snapshot */
980 poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
982 perf_session__mmap_read(top.session);
984 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
985 display_thread), NULL)) {
986 printf("Could not create display thread.\n");
991 struct sched_param param;
993 param.sched_priority = realtime_prio;
994 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
995 printf("Could not set realtime priority.\n");
1001 u64 hits = top.samples;
1003 perf_session__mmap_read(top.session);
1005 if (hits == top.samples)
1006 ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
1010 perf_session__delete(top.session);
1017 parse_callchain_opt(const struct option *opt __used, const char *arg,
1027 dont_use_callchains = true;
1031 symbol_conf.use_callchain = true;
1036 tok = strtok((char *)arg, ",");
1040 /* get the output mode */
1041 if (!strncmp(tok, "graph", strlen(arg)))
1042 callchain_param.mode = CHAIN_GRAPH_ABS;
1044 else if (!strncmp(tok, "flat", strlen(arg)))
1045 callchain_param.mode = CHAIN_FLAT;
1047 else if (!strncmp(tok, "fractal", strlen(arg)))
1048 callchain_param.mode = CHAIN_GRAPH_REL;
1050 else if (!strncmp(tok, "none", strlen(arg))) {
1051 callchain_param.mode = CHAIN_NONE;
1052 symbol_conf.use_callchain = false;
1060 /* get the min percentage */
1061 tok = strtok(NULL, ",");
1065 callchain_param.min_percent = strtod(tok, &endptr);
1069 /* get the print limit */
1070 tok2 = strtok(NULL, ",");
1074 if (tok2[0] != 'c') {
1075 callchain_param.print_limit = strtod(tok2, &endptr);
1076 tok2 = strtok(NULL, ",");
1081 /* get the call chain order */
1082 if (!strcmp(tok2, "caller"))
1083 callchain_param.order = ORDER_CALLER;
1084 else if (!strcmp(tok2, "callee"))
1085 callchain_param.order = ORDER_CALLEE;
1089 if (callchain_register_param(&callchain_param) < 0) {
1090 fprintf(stderr, "Can't register callchain params\n");
1096 static const char * const top_usage[] = {
1097 "perf top [<options>]",
1101 static const struct option options[] = {
1102 OPT_CALLBACK('e', "event", &top.evlist, "event",
1103 "event selector. use 'perf list' to list available events",
1104 parse_events_option),
1105 OPT_INTEGER('c', "count", &default_interval,
1106 "event period to sample"),
1107 OPT_INTEGER('p', "pid", &top.target_pid,
1108 "profile events on existing process id"),
1109 OPT_INTEGER('t', "tid", &top.target_tid,
1110 "profile events on existing thread id"),
1111 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1112 "system-wide collection from all CPUs"),
1113 OPT_STRING('C', "cpu", &top.cpu_list, "cpu",
1114 "list of cpus to monitor"),
1115 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1116 "file", "vmlinux pathname"),
1117 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1118 "hide kernel symbols"),
1119 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1120 OPT_INTEGER('r', "realtime", &realtime_prio,
1121 "collect data with this RT SCHED_FIFO priority"),
1122 OPT_INTEGER('d', "delay", &top.delay_secs,
1123 "number of seconds to delay between refreshes"),
1124 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1125 "dump the symbol table used for profiling"),
1126 OPT_INTEGER('f', "count-filter", &top.count_filter,
1127 "only display functions with more events than this"),
1128 OPT_BOOLEAN('g', "group", &group,
1129 "put the counters into a counter group"),
1130 OPT_BOOLEAN('i', "inherit", &inherit,
1131 "child tasks inherit counters"),
1132 OPT_STRING(0, "sym-annotate", &sym_filter, "symbol name",
1133 "symbol to annotate"),
1134 OPT_BOOLEAN('z', "zero", &top.zero,
1135 "zero history across updates"),
1136 OPT_INTEGER('F', "freq", &top.freq,
1137 "profile at this frequency"),
1138 OPT_INTEGER('E', "entries", &top.print_entries,
1139 "display this many functions"),
1140 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1141 "hide user symbols"),
1142 OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"),
1143 OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
1144 OPT_INCR('v', "verbose", &verbose,
1145 "be more verbose (show counter open errors, etc)"),
1146 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1147 "sort by key(s): pid, comm, dso, symbol, parent"),
1148 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1149 "Show a column with the number of samples"),
1150 OPT_CALLBACK_DEFAULT('G', "call-graph", NULL, "output_type,min_percent, call_order",
1151 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1152 "Default: fractal,0.5,callee", &parse_callchain_opt,
1153 callchain_default_opt),
1154 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1155 "Show a column with the sum of periods"),
1156 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1157 "only consider symbols in these dsos"),
1158 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1159 "only consider symbols in these comms"),
1160 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1161 "only consider these symbols"),
1162 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1163 "Interleave source code with assembly code (default)"),
1164 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1165 "Display raw encoding of assembly instructions (default)"),
1166 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1167 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1171 int cmd_top(int argc, const char **argv, const char *prefix __used)
1173 struct perf_evsel *pos;
1174 int status = -ENOMEM;
1176 top.evlist = perf_evlist__new(NULL, NULL);
1177 if (top.evlist == NULL)
1180 symbol_conf.exclude_other = false;
1182 argc = parse_options(argc, argv, options, top_usage, 0);
1184 usage_with_options(top_usage, options);
1186 if (sort_order == default_sort_order)
1187 sort_order = "dso,symbol";
1189 setup_sorting(top_usage, options);
1196 setup_browser(false);
1198 /* CPU and PID are mutually exclusive */
1199 if (top.target_tid > 0 && top.cpu_list) {
1200 printf("WARNING: PID switch overriding CPU\n");
1202 top.cpu_list = NULL;
1205 if (top.target_pid != -1)
1206 top.target_tid = top.target_pid;
1208 if (perf_evlist__create_maps(top.evlist, top.target_pid,
1209 top.target_tid, top.cpu_list) < 0)
1210 usage_with_options(top_usage, options);
1212 if (!top.evlist->nr_entries &&
1213 perf_evlist__add_default(top.evlist) < 0) {
1214 pr_err("Not enough memory for event selector list\n");
1218 if (top.delay_secs < 1)
1222 * User specified count overrides default frequency.
1224 if (default_interval)
1226 else if (top.freq) {
1227 default_interval = top.freq;
1229 fprintf(stderr, "frequency and count are zero, aborting\n");
1233 list_for_each_entry(pos, &top.evlist->entries, node) {
1234 if (perf_evsel__alloc_fd(pos, top.evlist->cpus->nr,
1235 top.evlist->threads->nr) < 0)
1238 * Fill in the ones not specifically initialized via -c:
1240 if (pos->attr.sample_period)
1243 pos->attr.sample_period = default_interval;
1246 if (perf_evlist__alloc_pollfd(top.evlist) < 0 ||
1247 perf_evlist__alloc_mmap(top.evlist) < 0)
1250 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1252 symbol_conf.priv_size = sizeof(struct annotation);
1254 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1255 if (symbol__init() < 0)
1258 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1259 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1260 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1263 * Avoid annotation data structures overhead when symbols aren't on the
1266 sort_has_symbols = sort_sym.list.next != NULL;
1268 get_term_dimensions(&winsize);
1269 if (top.print_entries == 0) {
1270 update_print_entries(&winsize);
1271 signal(SIGWINCH, sig_winch_handler);
1274 status = __cmd_top();
1276 perf_evlist__delete(top.evlist);