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) < 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 && symbol__alloc_hist(sym) < 0) {
214 pthread_mutex_unlock(¬es->lock);
215 pr_err("Not enough memory for annotating '%s' symbol!\n",
221 ip = he->ms.map->map_ip(he->ms.map, ip);
222 symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
224 pthread_mutex_unlock(¬es->lock);
227 static void show_details(struct hist_entry *he)
229 struct annotation *notes;
230 struct symbol *symbol;
237 notes = symbol__annotation(symbol);
239 pthread_mutex_lock(¬es->lock);
241 if (notes->src == NULL)
244 printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
245 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
247 more = symbol__annotate_printf(symbol, he->ms.map, top.sym_evsel->idx,
248 0, sym_pcnt_filter, top.print_entries, 4);
250 symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
252 symbol__annotate_decay_histogram(symbol, top.sym_evsel->idx);
254 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
256 pthread_mutex_unlock(¬es->lock);
259 static const char CONSOLE_CLEAR[] = "
\e[H
\e[2J";
261 static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
262 struct addr_location *al,
263 struct perf_sample *sample)
265 struct hist_entry *he;
267 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
271 evsel->hists.stats.total_period += sample->period;
272 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
276 static void print_sym_table(void)
280 const int win_width = winsize.ws_col - 1;
284 perf_top__header_snprintf(&top, bf, sizeof(bf));
287 perf_top__reset_sample_counters(&top);
289 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
291 if (top.sym_evsel->hists.stats.nr_lost_warned !=
292 top.sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
293 top.sym_evsel->hists.stats.nr_lost_warned =
294 top.sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
295 color_fprintf(stdout, PERF_COLOR_RED,
296 "WARNING: LOST %d chunks, Check IO/CPU overload",
297 top.sym_evsel->hists.stats.nr_lost_warned);
301 if (top.sym_filter_entry) {
302 show_details(top.sym_filter_entry);
306 hists__collapse_resort_threaded(&top.sym_evsel->hists);
307 hists__output_resort_threaded(&top.sym_evsel->hists);
308 hists__decay_entries_threaded(&top.sym_evsel->hists,
309 top.hide_user_symbols,
310 top.hide_kernel_symbols);
311 hists__output_recalc_col_len(&top.sym_evsel->hists, winsize.ws_row - 3);
313 hists__fprintf(&top.sym_evsel->hists, NULL, false, false,
314 winsize.ws_row - 4 - printed, win_width, stdout);
317 static void prompt_integer(int *target, const char *msg)
319 char *buf = malloc(0), *p;
323 fprintf(stdout, "\n%s: ", msg);
324 if (getline(&buf, &dummy, stdin) < 0)
327 p = strchr(buf, '\n');
337 tmp = strtoul(buf, NULL, 10);
343 static void prompt_percent(int *target, const char *msg)
347 prompt_integer(&tmp, msg);
348 if (tmp >= 0 && tmp <= 100)
352 static void prompt_symbol(struct hist_entry **target, const char *msg)
354 char *buf = malloc(0), *p;
355 struct hist_entry *syme = *target, *n, *found = NULL;
356 struct rb_node *next;
359 /* zero counters of active symbol */
361 __zero_source_counters(syme);
365 fprintf(stdout, "\n%s: ", msg);
366 if (getline(&buf, &dummy, stdin) < 0)
369 p = strchr(buf, '\n');
373 next = rb_first(&top.sym_evsel->hists.entries);
375 n = rb_entry(next, struct hist_entry, rb_node);
376 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
380 next = rb_next(&n->rb_node);
384 fprintf(stderr, "Sorry, %s is not active.\n", buf);
394 static void print_mapped_keys(void)
398 if (top.sym_filter_entry) {
399 struct symbol *sym = top.sym_filter_entry->ms.sym;
403 fprintf(stdout, "\nMapped keys:\n");
404 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top.delay_secs);
405 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top.print_entries);
407 if (top.evlist->nr_entries > 1)
408 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top.sym_evsel));
410 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top.count_filter);
412 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
413 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
414 fprintf(stdout, "\t[S] stop annotation.\n");
417 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
418 top.hide_kernel_symbols ? "yes" : "no");
420 "\t[U] hide user symbols. \t(%s)\n",
421 top.hide_user_symbols ? "yes" : "no");
422 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top.zero ? 1 : 0);
423 fprintf(stdout, "\t[qQ] quit.\n");
426 static int key_mapped(int c)
442 return top.evlist->nr_entries > 1 ? 1 : 0;
450 static void handle_keypress(int c)
452 if (!key_mapped(c)) {
453 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
454 struct termios tc, save;
457 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
462 tc.c_lflag &= ~(ICANON | ECHO);
465 tcsetattr(0, TCSANOW, &tc);
467 poll(&stdin_poll, 1, -1);
470 tcsetattr(0, TCSAFLUSH, &save);
477 prompt_integer(&top.delay_secs, "Enter display delay");
478 if (top.delay_secs < 1)
482 prompt_integer(&top.print_entries, "Enter display entries (lines)");
483 if (top.print_entries == 0) {
484 sig_winch_handler(SIGWINCH);
485 signal(SIGWINCH, sig_winch_handler);
487 signal(SIGWINCH, SIG_DFL);
490 if (top.evlist->nr_entries > 1) {
491 /* Select 0 as the default event: */
494 fprintf(stderr, "\nAvailable events:");
496 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
497 fprintf(stderr, "\n\t%d %s", top.sym_evsel->idx, event_name(top.sym_evsel));
499 prompt_integer(&counter, "Enter details event counter");
501 if (counter >= top.evlist->nr_entries) {
502 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
503 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top.sym_evsel));
507 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
508 if (top.sym_evsel->idx == counter)
511 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
514 prompt_integer(&top.count_filter, "Enter display event count filter");
517 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
520 top.hide_kernel_symbols = !top.hide_kernel_symbols;
524 printf("exiting.\n");
526 perf_session__fprintf_dsos(top.session, stderr);
529 prompt_symbol(&top.sym_filter_entry, "Enter details symbol");
532 if (!top.sym_filter_entry)
535 struct hist_entry *syme = top.sym_filter_entry;
537 top.sym_filter_entry = NULL;
538 __zero_source_counters(syme);
542 top.hide_user_symbols = !top.hide_user_symbols;
545 top.zero = !top.zero;
552 static void perf_top__sort_new_samples(void *arg)
554 struct perf_top *t = arg;
555 perf_top__reset_sample_counters(t);
557 if (t->evlist->selected != NULL)
558 t->sym_evsel = t->evlist->selected;
560 hists__collapse_resort_threaded(&t->sym_evsel->hists);
561 hists__output_resort_threaded(&t->sym_evsel->hists);
562 hists__decay_entries_threaded(&t->sym_evsel->hists,
563 top.hide_user_symbols,
564 top.hide_kernel_symbols);
567 static void *display_thread_tui(void *arg __used)
569 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
571 perf_top__sort_new_samples(&top);
572 perf_evlist__tui_browse_hists(top.evlist, help,
573 perf_top__sort_new_samples,
574 &top, top.delay_secs);
581 static void *display_thread(void *arg __used)
583 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
584 struct termios tc, save;
589 tc.c_lflag &= ~(ICANON | ECHO);
593 pthread__unblock_sigwinch();
595 delay_msecs = top.delay_secs * 1000;
596 tcsetattr(0, TCSANOW, &tc);
603 * Either timeout expired or we got an EINTR due to SIGWINCH,
604 * refresh screen in both cases.
606 switch (poll(&stdin_poll, 1, delay_msecs)) {
619 tcsetattr(0, TCSAFLUSH, &save);
627 /* Tag samples to be skipped. */
628 static const char *skip_symbols[] = {
635 "mwait_idle_with_hints",
637 "ppc64_runlatch_off",
638 "pseries_dedicated_idle_sleep",
642 static int symbol_filter(struct map *map __used, struct symbol *sym)
644 const char *name = sym->name;
648 * ppc64 uses function descriptors and appends a '.' to the
649 * start of every instruction address. Remove it.
654 if (!strcmp(name, "_text") ||
655 !strcmp(name, "_etext") ||
656 !strcmp(name, "_sinittext") ||
657 !strncmp("init_module", name, 11) ||
658 !strncmp("cleanup_module", name, 14) ||
659 strstr(name, "_text_start") ||
660 strstr(name, "_text_end"))
663 for (i = 0; skip_symbols[i]; i++) {
664 if (!strcmp(skip_symbols[i], name)) {
673 static void perf_event__process_sample(const union perf_event *event,
674 struct perf_evsel *evsel,
675 struct perf_sample *sample,
676 struct machine *machine)
678 struct symbol *parent = NULL;
679 u64 ip = event->ip.ip;
680 struct addr_location al;
683 if (!machine && perf_guest) {
684 pr_err("Can't find guest [%d]'s kernel information\n",
689 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
692 if (perf_event__preprocess_sample(event, machine, &al, sample,
693 symbol_filter) < 0 ||
697 if (!kptr_restrict_warned &&
698 symbol_conf.kptr_restrict &&
699 al.cpumode == PERF_RECORD_MISC_KERNEL) {
701 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
702 "Check /proc/sys/kernel/kptr_restrict.\n\n"
703 "Kernel%s samples will not be resolved.\n",
704 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
706 if (use_browser <= 0)
708 kptr_restrict_warned = true;
711 if (al.sym == NULL) {
712 const char *msg = "Kernel samples will not be resolved.\n";
714 * As we do lazy loading of symtabs we only will know if the
715 * specified vmlinux file is invalid when we actually have a
716 * hit in kernel space and then try to load it. So if we get
717 * here and there are _no_ symbols in the DSO backing the
718 * kernel map, bail out.
720 * We may never get here, for instance, if we use -K/
721 * --hide-kernel-symbols, even if the user specifies an
722 * invalid --vmlinux ;-)
724 if (!kptr_restrict_warned && !vmlinux_warned &&
725 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
726 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
727 if (symbol_conf.vmlinux_name) {
728 ui__warning("The %s file can't be used.\n%s",
729 symbol_conf.vmlinux_name, msg);
731 ui__warning("A vmlinux file was not found.\n%s",
735 if (use_browser <= 0)
737 vmlinux_warned = true;
741 if (al.sym == NULL || !al.sym->ignore) {
742 struct hist_entry *he;
744 if ((sort__has_parent || symbol_conf.use_callchain) &&
746 err = machine__resolve_callchain(machine, evsel, al.thread,
747 sample->callchain, &parent);
752 he = perf_evsel__add_hist_entry(evsel, &al, sample);
754 pr_err("Problem incrementing symbol period, skipping event\n");
758 if (symbol_conf.use_callchain) {
759 err = callchain_append(he->callchain, &evsel->hists.callchain_cursor,
765 if (sort_has_symbols)
766 record_precise_ip(he, evsel->idx, ip);
772 static void perf_session__mmap_read_idx(struct perf_session *self, int idx)
774 struct perf_sample sample;
775 struct perf_evsel *evsel;
776 union perf_event *event;
777 struct machine *machine;
781 while ((event = perf_evlist__mmap_read(top.evlist, idx)) != NULL) {
782 ret = perf_session__parse_sample(self, event, &sample);
784 pr_err("Can't parse sample, err = %d\n", ret);
788 evsel = perf_evlist__id2evsel(self->evlist, sample.id);
789 assert(evsel != NULL);
791 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
793 if (event->header.type == PERF_RECORD_SAMPLE)
797 case PERF_RECORD_MISC_USER:
799 if (top.hide_user_symbols)
801 machine = perf_session__find_host_machine(self);
803 case PERF_RECORD_MISC_KERNEL:
804 ++top.kernel_samples;
805 if (top.hide_kernel_symbols)
807 machine = perf_session__find_host_machine(self);
809 case PERF_RECORD_MISC_GUEST_KERNEL:
810 ++top.guest_kernel_samples;
811 machine = perf_session__find_machine(self, event->ip.pid);
813 case PERF_RECORD_MISC_GUEST_USER:
814 ++top.guest_us_samples;
816 * TODO: we don't process guest user from host side
817 * except simple counting.
825 if (event->header.type == PERF_RECORD_SAMPLE)
826 perf_event__process_sample(event, evsel, &sample, machine);
827 else if (event->header.type < PERF_RECORD_MAX) {
828 hists__inc_nr_events(&evsel->hists, event->header.type);
829 perf_event__process(&top.ops, event, &sample, machine);
831 ++self->hists.stats.nr_unknown_events;
835 static void perf_session__mmap_read(struct perf_session *self)
839 for (i = 0; i < top.evlist->nr_mmaps; i++)
840 perf_session__mmap_read_idx(self, i);
843 static void start_counters(struct perf_evlist *evlist)
845 struct perf_evsel *counter, *first;
847 first = list_entry(evlist->entries.next, struct perf_evsel, node);
849 list_for_each_entry(counter, &evlist->entries, node) {
850 struct perf_event_attr *attr = &counter->attr;
851 struct xyarray *group_fd = NULL;
853 if (group && counter != first)
854 group_fd = first->fd;
856 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
859 attr->sample_type |= PERF_SAMPLE_PERIOD;
861 attr->sample_freq = top.freq;
864 if (evlist->nr_entries > 1) {
865 attr->sample_type |= PERF_SAMPLE_ID;
866 attr->read_format |= PERF_FORMAT_ID;
869 if (symbol_conf.use_callchain)
870 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
874 attr->inherit = inherit;
876 attr->sample_id_all = sample_id_all_avail ? 1 : 0;
878 if (perf_evsel__open(counter, top.evlist->cpus,
879 top.evlist->threads, group,
883 if (err == EPERM || err == EACCES) {
884 ui__error_paranoid();
886 } else if (err == EINVAL && sample_id_all_avail) {
888 * Old kernel, no attr->sample_id_type_all field
890 sample_id_all_avail = false;
891 goto retry_sample_id;
894 * If it's cycles then fall back to hrtimer
895 * based cpu-clock-tick sw counter, which
896 * is always available even if no PMU support:
898 if (attr->type == PERF_TYPE_HARDWARE &&
899 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
901 ui__warning("Cycles event not supported,\n"
902 "trying to fall back to cpu-clock-ticks\n");
904 attr->type = PERF_TYPE_SOFTWARE;
905 attr->config = PERF_COUNT_SW_CPU_CLOCK;
910 ui__warning("The %s event is not supported.\n",
911 event_name(counter));
915 ui__warning("The sys_perf_event_open() syscall "
916 "returned with %d (%s). /bin/dmesg "
917 "may provide additional information.\n"
918 "No CONFIG_PERF_EVENTS=y kernel support "
919 "configured?\n", err, strerror(err));
924 if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) {
925 ui__warning("Failed to mmap with %d (%s)\n",
926 errno, strerror(errno));
937 static int setup_sample_type(void)
939 if (!sort_has_symbols) {
940 if (symbol_conf.use_callchain) {
941 ui__warning("Selected -g but \"sym\" not present in --sort/-s.");
944 } else if (!dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
945 if (callchain_register_param(&callchain_param) < 0) {
946 ui__warning("Can't register callchain params.\n");
954 static int __cmd_top(void)
959 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
960 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
962 top.session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
963 if (top.session == NULL)
966 ret = setup_sample_type();
970 if (top.target_tid != -1)
971 perf_event__synthesize_thread_map(&top.ops, top.evlist->threads,
973 &top.session->host_machine);
975 perf_event__synthesize_threads(&top.ops, perf_event__process,
976 &top.session->host_machine);
977 start_counters(top.evlist);
978 top.session->evlist = top.evlist;
979 perf_session__update_sample_type(top.session);
981 /* Wait for a minimal set of events before starting the snapshot */
982 poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
984 perf_session__mmap_read(top.session);
986 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
987 display_thread), NULL)) {
988 printf("Could not create display thread.\n");
993 struct sched_param param;
995 param.sched_priority = realtime_prio;
996 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
997 printf("Could not set realtime priority.\n");
1003 u64 hits = top.samples;
1005 perf_session__mmap_read(top.session);
1007 if (hits == top.samples)
1008 ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
1012 perf_session__delete(top.session);
1019 parse_callchain_opt(const struct option *opt __used, const char *arg,
1029 dont_use_callchains = true;
1033 symbol_conf.use_callchain = true;
1038 tok = strtok((char *)arg, ",");
1042 /* get the output mode */
1043 if (!strncmp(tok, "graph", strlen(arg)))
1044 callchain_param.mode = CHAIN_GRAPH_ABS;
1046 else if (!strncmp(tok, "flat", strlen(arg)))
1047 callchain_param.mode = CHAIN_FLAT;
1049 else if (!strncmp(tok, "fractal", strlen(arg)))
1050 callchain_param.mode = CHAIN_GRAPH_REL;
1052 else if (!strncmp(tok, "none", strlen(arg))) {
1053 callchain_param.mode = CHAIN_NONE;
1054 symbol_conf.use_callchain = false;
1062 /* get the min percentage */
1063 tok = strtok(NULL, ",");
1067 callchain_param.min_percent = strtod(tok, &endptr);
1071 /* get the print limit */
1072 tok2 = strtok(NULL, ",");
1076 if (tok2[0] != 'c') {
1077 callchain_param.print_limit = strtod(tok2, &endptr);
1078 tok2 = strtok(NULL, ",");
1083 /* get the call chain order */
1084 if (!strcmp(tok2, "caller"))
1085 callchain_param.order = ORDER_CALLER;
1086 else if (!strcmp(tok2, "callee"))
1087 callchain_param.order = ORDER_CALLEE;
1091 if (callchain_register_param(&callchain_param) < 0) {
1092 fprintf(stderr, "Can't register callchain params\n");
1098 static const char * const top_usage[] = {
1099 "perf top [<options>]",
1103 static const struct option options[] = {
1104 OPT_CALLBACK('e', "event", &top.evlist, "event",
1105 "event selector. use 'perf list' to list available events",
1106 parse_events_option),
1107 OPT_INTEGER('c', "count", &default_interval,
1108 "event period to sample"),
1109 OPT_INTEGER('p', "pid", &top.target_pid,
1110 "profile events on existing process id"),
1111 OPT_INTEGER('t', "tid", &top.target_tid,
1112 "profile events on existing thread id"),
1113 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1114 "system-wide collection from all CPUs"),
1115 OPT_STRING('C', "cpu", &top.cpu_list, "cpu",
1116 "list of cpus to monitor"),
1117 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1118 "file", "vmlinux pathname"),
1119 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1120 "hide kernel symbols"),
1121 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1122 OPT_INTEGER('r', "realtime", &realtime_prio,
1123 "collect data with this RT SCHED_FIFO priority"),
1124 OPT_INTEGER('d', "delay", &top.delay_secs,
1125 "number of seconds to delay between refreshes"),
1126 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1127 "dump the symbol table used for profiling"),
1128 OPT_INTEGER('f', "count-filter", &top.count_filter,
1129 "only display functions with more events than this"),
1130 OPT_BOOLEAN('g', "group", &group,
1131 "put the counters into a counter group"),
1132 OPT_BOOLEAN('i', "inherit", &inherit,
1133 "child tasks inherit counters"),
1134 OPT_STRING(0, "sym-annotate", &sym_filter, "symbol name",
1135 "symbol to annotate"),
1136 OPT_BOOLEAN('z', "zero", &top.zero,
1137 "zero history across updates"),
1138 OPT_INTEGER('F', "freq", &top.freq,
1139 "profile at this frequency"),
1140 OPT_INTEGER('E', "entries", &top.print_entries,
1141 "display this many functions"),
1142 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1143 "hide user symbols"),
1144 OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"),
1145 OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
1146 OPT_INCR('v', "verbose", &verbose,
1147 "be more verbose (show counter open errors, etc)"),
1148 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1149 "sort by key(s): pid, comm, dso, symbol, parent"),
1150 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1151 "Show a column with the number of samples"),
1152 OPT_CALLBACK_DEFAULT('G', "call-graph", NULL, "output_type,min_percent, call_order",
1153 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1154 "Default: fractal,0.5,callee", &parse_callchain_opt,
1155 callchain_default_opt),
1156 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1157 "Show a column with the sum of periods"),
1158 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1159 "only consider symbols in these dsos"),
1160 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1161 "only consider symbols in these comms"),
1162 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1163 "only consider these symbols"),
1164 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1165 "Interleave source code with assembly code (default)"),
1166 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1167 "Display raw encoding of assembly instructions (default)"),
1168 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1169 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1173 int cmd_top(int argc, const char **argv, const char *prefix __used)
1175 struct perf_evsel *pos;
1176 int status = -ENOMEM;
1178 top.evlist = perf_evlist__new(NULL, NULL);
1179 if (top.evlist == NULL)
1182 symbol_conf.exclude_other = false;
1184 argc = parse_options(argc, argv, options, top_usage, 0);
1186 usage_with_options(top_usage, options);
1188 if (sort_order == default_sort_order)
1189 sort_order = "dso,symbol";
1191 setup_sorting(top_usage, options);
1198 setup_browser(false);
1200 /* CPU and PID are mutually exclusive */
1201 if (top.target_tid > 0 && top.cpu_list) {
1202 printf("WARNING: PID switch overriding CPU\n");
1204 top.cpu_list = NULL;
1207 if (top.target_pid != -1)
1208 top.target_tid = top.target_pid;
1210 if (perf_evlist__create_maps(top.evlist, top.target_pid,
1211 top.target_tid, top.cpu_list) < 0)
1212 usage_with_options(top_usage, options);
1214 if (!top.evlist->nr_entries &&
1215 perf_evlist__add_default(top.evlist) < 0) {
1216 pr_err("Not enough memory for event selector list\n");
1220 symbol_conf.nr_events = top.evlist->nr_entries;
1222 if (top.delay_secs < 1)
1226 * User specified count overrides default frequency.
1228 if (default_interval)
1230 else if (top.freq) {
1231 default_interval = top.freq;
1233 fprintf(stderr, "frequency and count are zero, aborting\n");
1237 list_for_each_entry(pos, &top.evlist->entries, node) {
1238 if (perf_evsel__alloc_fd(pos, top.evlist->cpus->nr,
1239 top.evlist->threads->nr) < 0)
1242 * Fill in the ones not specifically initialized via -c:
1244 if (pos->attr.sample_period)
1247 pos->attr.sample_period = default_interval;
1250 if (perf_evlist__alloc_pollfd(top.evlist) < 0 ||
1251 perf_evlist__alloc_mmap(top.evlist) < 0)
1254 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1256 symbol_conf.priv_size = sizeof(struct annotation);
1258 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1259 if (symbol__init() < 0)
1262 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1263 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1264 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1267 * Avoid annotation data structures overhead when symbols aren't on the
1270 sort_has_symbols = sort_sym.list.next != NULL;
1272 get_term_dimensions(&winsize);
1273 if (top.print_entries == 0) {
1274 update_print_entries(&winsize);
1275 signal(SIGWINCH, sig_winch_handler);
1278 status = __cmd_top();
1280 perf_evlist__delete(top.evlist);