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/config.h"
26 #include "util/color.h"
27 #include "util/drv_configs.h"
28 #include "util/evlist.h"
29 #include "util/evsel.h"
30 #include "util/machine.h"
31 #include "util/session.h"
32 #include "util/symbol.h"
33 #include "util/thread.h"
34 #include "util/thread_map.h"
36 #include "util/util.h"
37 #include <linux/rbtree.h>
38 #include <subcmd/parse-options.h>
39 #include "util/parse-events.h"
40 #include "util/cpumap.h"
41 #include "util/xyarray.h"
42 #include "util/sort.h"
43 #include "util/intlist.h"
44 #include "util/parse-branch-options.h"
45 #include "arch/common.h"
47 #include "util/debug.h"
62 #include <sys/syscall.h>
63 #include <sys/ioctl.h>
65 #include <sys/prctl.h>
68 #include <sys/utsname.h>
71 #include <linux/stringify.h>
72 #include <linux/time64.h>
73 #include <linux/types.h>
75 static volatile int done;
76 static volatile int resize;
78 #define HEADER_LINE_NR 5
80 static void perf_top__update_print_entries(struct perf_top *top)
82 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
85 static void perf_top__sig_winch(int sig __maybe_unused,
86 siginfo_t *info __maybe_unused, void *arg __maybe_unused)
91 static void perf_top__resize(struct perf_top *top)
93 get_term_dimensions(&top->winsize);
94 perf_top__update_print_entries(top);
97 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
100 struct annotation *notes;
104 if (!he || !he->ms.sym)
111 * We can't annotate with just /proc/kallsyms
113 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
114 !dso__is_kcore(map->dso)) {
115 pr_err("Can't annotate %s: No vmlinux file was found in the "
116 "path\n", sym->name);
121 notes = symbol__annotation(sym);
122 if (notes->src != NULL) {
123 pthread_mutex_lock(¬es->lock);
127 pthread_mutex_lock(¬es->lock);
129 if (symbol__alloc_hist(sym) < 0) {
130 pthread_mutex_unlock(¬es->lock);
131 pr_err("Not enough memory for annotating '%s' symbol!\n",
137 err = symbol__disassemble(sym, map, 0);
140 top->sym_filter_entry = he;
143 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
144 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
147 pthread_mutex_unlock(¬es->lock);
151 static void __zero_source_counters(struct hist_entry *he)
153 struct symbol *sym = he->ms.sym;
154 symbol__annotate_zero_histograms(sym);
157 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
160 int err = uname(&uts);
162 ui__warning("Out of bounds address found:\n\n"
163 "Addr: %" PRIx64 "\n"
165 "Map: %" PRIx64 "-%" PRIx64 "\n"
166 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
170 "Not all samples will be on the annotation output.\n\n"
171 "Please report to linux-kernel@vger.kernel.org\n",
172 ip, map->dso->long_name, dso__symtab_origin(map->dso),
173 map->start, map->end, sym->start, sym->end,
174 sym->binding == STB_GLOBAL ? 'g' :
175 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
176 err ? "[unknown]" : uts.machine,
177 err ? "[unknown]" : uts.release, perf_version_string);
178 if (use_browser <= 0)
181 map->erange_warned = true;
184 static void perf_top__record_precise_ip(struct perf_top *top,
185 struct hist_entry *he,
188 struct annotation *notes;
189 struct symbol *sym = he->ms.sym;
192 if (sym == NULL || (use_browser == 0 &&
193 (top->sym_filter_entry == NULL ||
194 top->sym_filter_entry->ms.sym != sym)))
197 notes = symbol__annotation(sym);
199 if (pthread_mutex_trylock(¬es->lock))
202 err = hist_entry__inc_addr_samples(he, counter, ip);
204 pthread_mutex_unlock(¬es->lock);
208 * This function is now called with he->hists->lock held.
209 * Release it before going to sleep.
211 pthread_mutex_unlock(&he->hists->lock);
213 if (err == -ERANGE && !he->ms.map->erange_warned)
214 ui__warn_map_erange(he->ms.map, sym, ip);
215 else if (err == -ENOMEM) {
216 pr_err("Not enough memory for annotating '%s' symbol!\n",
221 pthread_mutex_lock(&he->hists->lock);
225 static void perf_top__show_details(struct perf_top *top)
227 struct hist_entry *he = top->sym_filter_entry;
228 struct annotation *notes;
229 struct symbol *symbol;
236 notes = symbol__annotation(symbol);
238 pthread_mutex_lock(¬es->lock);
240 if (notes->src == NULL)
243 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
244 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
246 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
247 0, top->sym_pcnt_filter, top->print_entries, 4);
249 if (top->evlist->enabled) {
251 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
253 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
256 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
258 pthread_mutex_unlock(¬es->lock);
261 static void perf_top__print_sym_table(struct perf_top *top)
265 const int win_width = top->winsize.ws_col - 1;
266 struct perf_evsel *evsel = top->sym_evsel;
267 struct hists *hists = evsel__hists(evsel);
271 perf_top__header_snprintf(top, bf, sizeof(bf));
274 perf_top__reset_sample_counters(top);
276 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
278 if (hists->stats.nr_lost_warned !=
279 hists->stats.nr_events[PERF_RECORD_LOST]) {
280 hists->stats.nr_lost_warned =
281 hists->stats.nr_events[PERF_RECORD_LOST];
282 color_fprintf(stdout, PERF_COLOR_RED,
283 "WARNING: LOST %d chunks, Check IO/CPU overload",
284 hists->stats.nr_lost_warned);
288 if (top->sym_filter_entry) {
289 perf_top__show_details(top);
293 if (top->evlist->enabled) {
295 hists__delete_entries(hists);
297 hists__decay_entries(hists, top->hide_user_symbols,
298 top->hide_kernel_symbols);
302 hists__collapse_resort(hists, NULL);
303 perf_evsel__output_resort(evsel, NULL);
305 hists__output_recalc_col_len(hists, top->print_entries - printed);
307 hists__fprintf(hists, false, top->print_entries - printed, win_width,
308 top->min_percent, stdout, symbol_conf.use_callchain);
311 static void prompt_integer(int *target, const char *msg)
313 char *buf = malloc(0), *p;
317 fprintf(stdout, "\n%s: ", msg);
318 if (getline(&buf, &dummy, stdin) < 0)
321 p = strchr(buf, '\n');
331 tmp = strtoul(buf, NULL, 10);
337 static void prompt_percent(int *target, const char *msg)
341 prompt_integer(&tmp, msg);
342 if (tmp >= 0 && tmp <= 100)
346 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
348 char *buf = malloc(0), *p;
349 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
350 struct hists *hists = evsel__hists(top->sym_evsel);
351 struct rb_node *next;
354 /* zero counters of active symbol */
356 __zero_source_counters(syme);
357 top->sym_filter_entry = NULL;
360 fprintf(stdout, "\n%s: ", msg);
361 if (getline(&buf, &dummy, stdin) < 0)
364 p = strchr(buf, '\n');
368 next = rb_first(&hists->entries);
370 n = rb_entry(next, struct hist_entry, rb_node);
371 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
375 next = rb_next(&n->rb_node);
379 fprintf(stderr, "Sorry, %s is not active.\n", buf);
382 perf_top__parse_source(top, found);
388 static void perf_top__print_mapped_keys(struct perf_top *top)
392 if (top->sym_filter_entry) {
393 struct symbol *sym = top->sym_filter_entry->ms.sym;
397 fprintf(stdout, "\nMapped keys:\n");
398 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
399 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
401 if (top->evlist->nr_entries > 1)
402 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
404 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
406 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
407 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
408 fprintf(stdout, "\t[S] stop annotation.\n");
411 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
412 top->hide_kernel_symbols ? "yes" : "no");
414 "\t[U] hide user symbols. \t(%s)\n",
415 top->hide_user_symbols ? "yes" : "no");
416 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
417 fprintf(stdout, "\t[qQ] quit.\n");
420 static int perf_top__key_mapped(struct perf_top *top, int c)
436 return top->evlist->nr_entries > 1 ? 1 : 0;
444 static bool perf_top__handle_keypress(struct perf_top *top, int c)
448 if (!perf_top__key_mapped(top, c)) {
449 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
452 perf_top__print_mapped_keys(top);
453 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
456 set_term_quiet_input(&save);
458 poll(&stdin_poll, 1, -1);
461 tcsetattr(0, TCSAFLUSH, &save);
462 if (!perf_top__key_mapped(top, c))
468 prompt_integer(&top->delay_secs, "Enter display delay");
469 if (top->delay_secs < 1)
473 prompt_integer(&top->print_entries, "Enter display entries (lines)");
474 if (top->print_entries == 0) {
475 struct sigaction act = {
476 .sa_sigaction = perf_top__sig_winch,
477 .sa_flags = SA_SIGINFO,
479 perf_top__resize(top);
480 sigaction(SIGWINCH, &act, NULL);
482 signal(SIGWINCH, SIG_DFL);
486 if (top->evlist->nr_entries > 1) {
487 /* Select 0 as the default event: */
490 fprintf(stderr, "\nAvailable events:");
492 evlist__for_each_entry(top->evlist, top->sym_evsel)
493 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
495 prompt_integer(&counter, "Enter details event counter");
497 if (counter >= top->evlist->nr_entries) {
498 top->sym_evsel = perf_evlist__first(top->evlist);
499 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
503 evlist__for_each_entry(top->evlist, top->sym_evsel)
504 if (top->sym_evsel->idx == counter)
507 top->sym_evsel = perf_evlist__first(top->evlist);
510 prompt_integer(&top->count_filter, "Enter display event count filter");
513 prompt_percent(&top->sym_pcnt_filter,
514 "Enter details display event filter (percent)");
517 top->hide_kernel_symbols = !top->hide_kernel_symbols;
521 printf("exiting.\n");
522 if (top->dump_symtab)
523 perf_session__fprintf_dsos(top->session, stderr);
527 perf_top__prompt_symbol(top, "Enter details symbol");
530 if (!top->sym_filter_entry)
533 struct hist_entry *syme = top->sym_filter_entry;
535 top->sym_filter_entry = NULL;
536 __zero_source_counters(syme);
540 top->hide_user_symbols = !top->hide_user_symbols;
543 top->zero = !top->zero;
552 static void perf_top__sort_new_samples(void *arg)
554 struct perf_top *t = arg;
555 struct perf_evsel *evsel = t->sym_evsel;
558 perf_top__reset_sample_counters(t);
560 if (t->evlist->selected != NULL)
561 t->sym_evsel = t->evlist->selected;
563 hists = evsel__hists(evsel);
565 if (t->evlist->enabled) {
567 hists__delete_entries(hists);
569 hists__decay_entries(hists, t->hide_user_symbols,
570 t->hide_kernel_symbols);
574 hists__collapse_resort(hists, NULL);
575 perf_evsel__output_resort(evsel, NULL);
578 static void *display_thread_tui(void *arg)
580 struct perf_evsel *pos;
581 struct perf_top *top = arg;
582 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
583 struct hist_browser_timer hbt = {
584 .timer = perf_top__sort_new_samples,
586 .refresh = top->delay_secs,
589 perf_top__sort_new_samples(top);
592 * Initialize the uid_filter_str, in the future the TUI will allow
593 * Zooming in/out UIDs. For now juse use whatever the user passed
596 evlist__for_each_entry(top->evlist, pos) {
597 struct hists *hists = evsel__hists(pos);
598 hists->uid_filter_str = top->record_opts.target.uid_str;
601 perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
603 &top->session->header.env);
609 static void display_sig(int sig __maybe_unused)
614 static void display_setup_sig(void)
616 signal(SIGSEGV, sighandler_dump_stack);
617 signal(SIGFPE, sighandler_dump_stack);
618 signal(SIGINT, display_sig);
619 signal(SIGQUIT, display_sig);
620 signal(SIGTERM, display_sig);
623 static void *display_thread(void *arg)
625 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
627 struct perf_top *top = arg;
631 pthread__unblock_sigwinch();
633 delay_msecs = top->delay_secs * MSEC_PER_SEC;
634 set_term_quiet_input(&save);
637 if (poll(&stdin_poll, 1, 0) > 0)
641 perf_top__print_sym_table(top);
643 * Either timeout expired or we got an EINTR due to SIGWINCH,
644 * refresh screen in both cases.
646 switch (poll(&stdin_poll, 1, delay_msecs)) {
655 tcsetattr(0, TCSAFLUSH, &save);
657 if (perf_top__handle_keypress(top, c))
663 tcsetattr(0, TCSAFLUSH, &save);
667 static int hist_iter__top_callback(struct hist_entry_iter *iter,
668 struct addr_location *al, bool single,
671 struct perf_top *top = arg;
672 struct hist_entry *he = iter->he;
673 struct perf_evsel *evsel = iter->evsel;
675 if (perf_hpp_list.sym && single)
676 perf_top__record_precise_ip(top, he, evsel->idx, al->addr);
678 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
679 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
683 static void perf_event__process_sample(struct perf_tool *tool,
684 const union perf_event *event,
685 struct perf_evsel *evsel,
686 struct perf_sample *sample,
687 struct machine *machine)
689 struct perf_top *top = container_of(tool, struct perf_top, tool);
690 struct addr_location al;
693 if (!machine && perf_guest) {
694 static struct intlist *seen;
697 seen = intlist__new(NULL);
699 if (!intlist__has_entry(seen, sample->pid)) {
700 pr_err("Can't find guest [%d]'s kernel information\n",
702 intlist__add(seen, sample->pid);
708 pr_err("%u unprocessable samples recorded.\r",
709 top->session->evlist->stats.nr_unprocessable_samples++);
713 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
714 top->exact_samples++;
716 if (machine__resolve(machine, &al, sample) < 0)
719 if (!machine->kptr_restrict_warned &&
720 symbol_conf.kptr_restrict &&
721 al.cpumode == PERF_RECORD_MISC_KERNEL) {
723 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
724 "Check /proc/sys/kernel/kptr_restrict.\n\n"
725 "Kernel%s samples will not be resolved.\n",
726 al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
728 if (use_browser <= 0)
730 machine->kptr_restrict_warned = true;
733 if (al.sym == NULL) {
734 const char *msg = "Kernel samples will not be resolved.\n";
736 * As we do lazy loading of symtabs we only will know if the
737 * specified vmlinux file is invalid when we actually have a
738 * hit in kernel space and then try to load it. So if we get
739 * here and there are _no_ symbols in the DSO backing the
740 * kernel map, bail out.
742 * We may never get here, for instance, if we use -K/
743 * --hide-kernel-symbols, even if the user specifies an
744 * invalid --vmlinux ;-)
746 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
747 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
748 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
749 if (symbol_conf.vmlinux_name) {
751 dso__strerror_load(al.map->dso, serr, sizeof(serr));
752 ui__warning("The %s file can't be used: %s\n%s",
753 symbol_conf.vmlinux_name, serr, msg);
755 ui__warning("A vmlinux file was not found.\n%s",
759 if (use_browser <= 0)
761 top->vmlinux_warned = true;
765 if (al.sym == NULL || !al.sym->idle) {
766 struct hists *hists = evsel__hists(evsel);
767 struct hist_entry_iter iter = {
770 .add_entry_cb = hist_iter__top_callback,
773 if (symbol_conf.cumulate_callchain)
774 iter.ops = &hist_iter_cumulative;
776 iter.ops = &hist_iter_normal;
778 pthread_mutex_lock(&hists->lock);
780 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
782 pr_err("Problem incrementing symbol period, skipping event\n");
784 pthread_mutex_unlock(&hists->lock);
787 addr_location__put(&al);
790 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
792 struct perf_sample sample;
793 struct perf_evsel *evsel;
794 struct perf_session *session = top->session;
795 union perf_event *event;
796 struct machine *machine;
799 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
800 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
802 pr_err("Can't parse sample, err = %d\n", ret);
806 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
807 assert(evsel != NULL);
809 if (event->header.type == PERF_RECORD_SAMPLE)
812 switch (sample.cpumode) {
813 case PERF_RECORD_MISC_USER:
815 if (top->hide_user_symbols)
817 machine = &session->machines.host;
819 case PERF_RECORD_MISC_KERNEL:
820 ++top->kernel_samples;
821 if (top->hide_kernel_symbols)
823 machine = &session->machines.host;
825 case PERF_RECORD_MISC_GUEST_KERNEL:
826 ++top->guest_kernel_samples;
827 machine = perf_session__find_machine(session,
830 case PERF_RECORD_MISC_GUEST_USER:
831 ++top->guest_us_samples;
833 * TODO: we don't process guest user from host side
834 * except simple counting.
838 if (event->header.type == PERF_RECORD_SAMPLE)
840 machine = &session->machines.host;
845 if (event->header.type == PERF_RECORD_SAMPLE) {
846 perf_event__process_sample(&top->tool, event, evsel,
848 } else if (event->header.type < PERF_RECORD_MAX) {
849 hists__inc_nr_events(evsel__hists(evsel), event->header.type);
850 machine__process_event(machine, event, &sample);
852 ++session->evlist->stats.nr_unknown_events;
854 perf_evlist__mmap_consume(top->evlist, idx);
858 static void perf_top__mmap_read(struct perf_top *top)
862 for (i = 0; i < top->evlist->nr_mmaps; i++)
863 perf_top__mmap_read_idx(top, i);
866 static int perf_top__start_counters(struct perf_top *top)
869 struct perf_evsel *counter;
870 struct perf_evlist *evlist = top->evlist;
871 struct record_opts *opts = &top->record_opts;
873 perf_evlist__config(evlist, opts, &callchain_param);
875 evlist__for_each_entry(evlist, counter) {
877 if (perf_evsel__open(counter, top->evlist->cpus,
878 top->evlist->threads) < 0) {
879 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
881 ui__warning("%s\n", msg);
885 perf_evsel__open_strerror(counter, &opts->target,
886 errno, msg, sizeof(msg));
887 ui__error("%s\n", msg);
892 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
893 ui__error("Failed to mmap with %d (%s)\n",
894 errno, str_error_r(errno, msg, sizeof(msg)));
904 static int callchain_param__setup_sample_type(struct callchain_param *callchain)
906 if (!perf_hpp_list.sym) {
907 if (callchain->enabled) {
908 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
911 } else if (callchain->mode != CHAIN_NONE) {
912 if (callchain_register_param(callchain) < 0) {
913 ui__error("Can't register callchain params.\n");
921 static int __cmd_top(struct perf_top *top)
924 struct perf_evsel *pos;
925 struct perf_evsel_config_term *err_term;
926 struct perf_evlist *evlist = top->evlist;
927 struct record_opts *opts = &top->record_opts;
931 top->session = perf_session__new(NULL, false, NULL);
932 if (top->session == NULL)
936 ret = perf_env__lookup_objdump(&top->session->header.env);
941 ret = callchain_param__setup_sample_type(&callchain_param);
945 if (perf_session__register_idle_thread(top->session) < 0)
948 machine__synthesize_threads(&top->session->machines.host, &opts->target,
949 top->evlist->threads, false, opts->proc_map_timeout);
951 if (perf_hpp_list.socket) {
952 ret = perf_env__read_cpu_topology_map(&perf_env);
954 goto out_err_cpu_topo;
957 ret = perf_top__start_counters(top);
961 ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term);
963 error("failed to set config \"%s\" on event %s with %d (%s)\n",
964 err_term->val.drv_cfg, perf_evsel__name(pos), errno,
965 str_error_r(errno, msg, sizeof(msg)));
969 top->session->evlist = top->evlist;
970 perf_session__set_id_hdr_size(top->session);
973 * When perf is starting the traced process, all the events (apart from
974 * group members) have enable_on_exec=1 set, so don't spoil it by
975 * prematurely enabling them.
977 * XXX 'top' still doesn't start workloads like record, trace, but should,
978 * so leave the check here.
980 if (!target__none(&opts->target))
981 perf_evlist__enable(top->evlist);
983 /* Wait for a minimal set of events before starting the snapshot */
984 perf_evlist__poll(top->evlist, 100);
986 perf_top__mmap_read(top);
989 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
990 display_thread), top)) {
991 ui__error("Could not create display thread.\n");
995 if (top->realtime_prio) {
996 struct sched_param param;
998 param.sched_priority = top->realtime_prio;
999 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1000 ui__error("Could not set realtime priority.\n");
1006 u64 hits = top->samples;
1008 perf_top__mmap_read(top);
1010 if (hits == top->samples)
1011 ret = perf_evlist__poll(top->evlist, 100);
1014 perf_top__resize(top);
1021 pthread_join(thread, NULL);
1023 perf_session__delete(top->session);
1024 top->session = NULL;
1029 char errbuf[BUFSIZ];
1030 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1032 ui__error("Could not read the CPU topology map: %s\n", err);
1038 callchain_opt(const struct option *opt, const char *arg, int unset)
1040 symbol_conf.use_callchain = true;
1041 return record_callchain_opt(opt, arg, unset);
1045 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1047 struct callchain_param *callchain = opt->value;
1049 callchain->enabled = !unset;
1050 callchain->record_mode = CALLCHAIN_FP;
1056 symbol_conf.use_callchain = false;
1057 callchain->record_mode = CALLCHAIN_NONE;
1061 return parse_callchain_top_opt(arg);
1064 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1066 if (!strcmp(var, "top.call-graph")) {
1067 var = "call-graph.record-mode";
1068 return perf_default_config(var, value, cb);
1070 if (!strcmp(var, "top.children")) {
1071 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1079 parse_percent_limit(const struct option *opt, const char *arg,
1080 int unset __maybe_unused)
1082 struct perf_top *top = opt->value;
1084 top->min_percent = strtof(arg, NULL);
1088 const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1089 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1091 int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1093 char errbuf[BUFSIZ];
1094 struct perf_top top = {
1098 .mmap_pages = UINT_MAX,
1099 .user_freq = UINT_MAX,
1100 .user_interval = ULLONG_MAX,
1101 .freq = 4000, /* 4 KHz */
1105 .proc_map_timeout = 500,
1107 .max_stack = sysctl_perf_event_max_stack,
1108 .sym_pcnt_filter = 5,
1110 struct record_opts *opts = &top.record_opts;
1111 struct target *target = &opts->target;
1112 const struct option options[] = {
1113 OPT_CALLBACK('e', "event", &top.evlist, "event",
1114 "event selector. use 'perf list' to list available events",
1115 parse_events_option),
1116 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1117 OPT_STRING('p', "pid", &target->pid, "pid",
1118 "profile events on existing process id"),
1119 OPT_STRING('t', "tid", &target->tid, "tid",
1120 "profile events on existing thread id"),
1121 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1122 "system-wide collection from all CPUs"),
1123 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1124 "list of cpus to monitor"),
1125 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1126 "file", "vmlinux pathname"),
1127 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1128 "don't load vmlinux even if found"),
1129 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1130 "hide kernel symbols"),
1131 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1132 "number of mmap data pages",
1133 perf_evlist__parse_mmap_pages),
1134 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1135 "collect data with this RT SCHED_FIFO priority"),
1136 OPT_INTEGER('d', "delay", &top.delay_secs,
1137 "number of seconds to delay between refreshes"),
1138 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1139 "dump the symbol table used for profiling"),
1140 OPT_INTEGER('f', "count-filter", &top.count_filter,
1141 "only display functions with more events than this"),
1142 OPT_BOOLEAN(0, "group", &opts->group,
1143 "put the counters into a counter group"),
1144 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1145 "child tasks do not inherit counters"),
1146 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1147 "symbol to annotate"),
1148 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1149 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1150 OPT_INTEGER('E', "entries", &top.print_entries,
1151 "display this many functions"),
1152 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1153 "hide user symbols"),
1154 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1155 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1156 OPT_INCR('v', "verbose", &verbose,
1157 "be more verbose (show counter open errors, etc)"),
1158 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1159 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1160 " Please refer the man page for the complete list."),
1161 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1162 "output field(s): overhead, period, sample plus all of sort keys"),
1163 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1164 "Show a column with the number of samples"),
1165 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1166 NULL, "enables call-graph recording and display",
1168 OPT_CALLBACK(0, "call-graph", &callchain_param,
1169 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1170 top_callchain_help, &parse_callchain_opt),
1171 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1172 "Accumulate callchains of children and show total overhead as well"),
1173 OPT_INTEGER(0, "max-stack", &top.max_stack,
1174 "Set the maximum stack depth when parsing the callchain. "
1175 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1176 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1177 "ignore callees of these functions in call graphs",
1178 report_parse_ignore_callees_opt),
1179 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1180 "Show a column with the sum of periods"),
1181 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1182 "only consider symbols in these dsos"),
1183 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1184 "only consider symbols in these comms"),
1185 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1186 "only consider these symbols"),
1187 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1188 "Interleave source code with assembly code (default)"),
1189 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1190 "Display raw encoding of assembly instructions (default)"),
1191 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1192 "Enable kernel symbol demangling"),
1193 OPT_STRING(0, "objdump", &objdump_path, "path",
1194 "objdump binary to use for disassembly and annotations"),
1195 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1196 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1197 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1198 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1199 "Don't show entries under that percent", parse_percent_limit),
1200 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1201 "How to display percentage of filtered entries", parse_filter_percentage),
1202 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1204 "don't try to adjust column width, use these fixed values"),
1205 OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1206 "per thread proc mmap processing timeout in ms"),
1207 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1208 "branch any", "sample any taken branches",
1209 parse_branch_stack),
1210 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1211 "branch filter mask", "branch stack filter modes",
1212 parse_branch_stack),
1213 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1214 "Show raw trace event output (do not use print fmt or plugins)"),
1215 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1216 "Show entries in a hierarchy"),
1219 const char * const top_usage[] = {
1220 "perf top [<options>]",
1223 int status = hists__init();
1228 top.evlist = perf_evlist__new();
1229 if (top.evlist == NULL)
1232 perf_config(perf_top_config, &top);
1234 argc = parse_options(argc, argv, options, top_usage, 0);
1236 usage_with_options(top_usage, options);
1238 if (!top.evlist->nr_entries &&
1239 perf_evlist__add_default(top.evlist) < 0) {
1240 pr_err("Not enough memory for event selector list\n");
1241 goto out_delete_evlist;
1244 if (symbol_conf.report_hierarchy) {
1245 /* disable incompatible options */
1246 symbol_conf.event_group = false;
1247 symbol_conf.cumulate_callchain = false;
1250 pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1251 parse_options_usage(top_usage, options, "fields", 0);
1252 parse_options_usage(NULL, options, "hierarchy", 0);
1253 goto out_delete_evlist;
1257 sort__mode = SORT_MODE__TOP;
1258 /* display thread wants entries to be collapsed in a different tree */
1259 perf_hpp_list.need_collapse = 1;
1263 else if (top.use_tui)
1266 setup_browser(false);
1268 if (setup_sorting(top.evlist) < 0) {
1270 parse_options_usage(top_usage, options, "s", 1);
1272 parse_options_usage(sort_order ? NULL : top_usage,
1273 options, "fields", 0);
1274 goto out_delete_evlist;
1277 status = target__validate(target);
1279 target__strerror(target, status, errbuf, BUFSIZ);
1280 ui__warning("%s\n", errbuf);
1283 status = target__parse_uid(target);
1285 int saved_errno = errno;
1287 target__strerror(target, status, errbuf, BUFSIZ);
1288 ui__error("%s\n", errbuf);
1290 status = -saved_errno;
1291 goto out_delete_evlist;
1294 if (target__none(target))
1295 target->system_wide = true;
1297 if (perf_evlist__create_maps(top.evlist, target) < 0) {
1298 ui__error("Couldn't create thread/CPU maps: %s\n",
1299 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1300 goto out_delete_evlist;
1303 symbol_conf.nr_events = top.evlist->nr_entries;
1305 if (top.delay_secs < 1)
1308 if (record_opts__config(opts)) {
1310 goto out_delete_evlist;
1313 top.sym_evsel = perf_evlist__first(top.evlist);
1315 if (!callchain_param.enabled) {
1316 symbol_conf.cumulate_callchain = false;
1317 perf_hpp__cancel_cumulate();
1320 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1321 callchain_param.order = ORDER_CALLER;
1323 status = symbol__annotation_init();
1325 goto out_delete_evlist;
1327 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1328 status = symbol__init(NULL);
1330 goto out_delete_evlist;
1332 sort__setup_elide(stdout);
1334 get_term_dimensions(&top.winsize);
1335 if (top.print_entries == 0) {
1336 struct sigaction act = {
1337 .sa_sigaction = perf_top__sig_winch,
1338 .sa_flags = SA_SIGINFO,
1340 perf_top__update_print_entries(&top);
1341 sigaction(SIGWINCH, &act, NULL);
1344 status = __cmd_top(&top);
1347 perf_evlist__delete(top.evlist);