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"
41 #include "util/intlist.h"
43 #include "util/debug.h"
58 #include <sys/syscall.h>
59 #include <sys/ioctl.h>
61 #include <sys/prctl.h>
64 #include <sys/utsname.h>
67 #include <linux/unistd.h>
68 #include <linux/types.h>
70 void get_term_dimensions(struct winsize *ws)
72 char *s = getenv("LINES");
76 s = getenv("COLUMNS");
79 if (ws->ws_row && ws->ws_col)
84 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
85 ws->ws_row && ws->ws_col)
92 static void perf_top__update_print_entries(struct perf_top *top)
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 if (!top->print_entries
104 || (top->print_entries+4) > top->winsize.ws_row) {
105 top->print_entries = top->winsize.ws_row;
107 top->print_entries += 4;
108 top->winsize.ws_row = top->print_entries;
110 perf_top__update_print_entries(top);
113 static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
116 struct annotation *notes;
120 if (!he || !he->ms.sym)
127 * We can't annotate with just /proc/kallsyms
129 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS) {
130 pr_err("Can't annotate %s: No vmlinux file was found in the "
131 "path\n", sym->name);
136 notes = symbol__annotation(sym);
137 if (notes->src != NULL) {
138 pthread_mutex_lock(¬es->lock);
142 pthread_mutex_lock(¬es->lock);
144 if (symbol__alloc_hist(sym) < 0) {
145 pthread_mutex_unlock(¬es->lock);
146 pr_err("Not enough memory for annotating '%s' symbol!\n",
152 err = symbol__annotate(sym, map, 0);
155 top->sym_filter_entry = he;
158 pthread_mutex_unlock(¬es->lock);
162 static void __zero_source_counters(struct hist_entry *he)
164 struct symbol *sym = he->ms.sym;
165 symbol__annotate_zero_histograms(sym);
168 static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
171 int err = uname(&uts);
173 ui__warning("Out of bounds address found:\n\n"
174 "Addr: %" PRIx64 "\n"
176 "Map: %" PRIx64 "-%" PRIx64 "\n"
177 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
181 "Not all samples will be on the annotation output.\n\n"
182 "Please report to linux-kernel@vger.kernel.org\n",
183 ip, map->dso->long_name, dso__symtab_origin(map->dso),
184 map->start, map->end, sym->start, sym->end,
185 sym->binding == STB_GLOBAL ? 'g' :
186 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
187 err ? "[unknown]" : uts.machine,
188 err ? "[unknown]" : uts.release, perf_version_string);
189 if (use_browser <= 0)
192 map->erange_warned = true;
195 static void perf_top__record_precise_ip(struct perf_top *top,
196 struct hist_entry *he,
199 struct annotation *notes;
203 if (he == NULL || he->ms.sym == NULL ||
204 ((top->sym_filter_entry == NULL ||
205 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
209 notes = symbol__annotation(sym);
211 if (pthread_mutex_trylock(¬es->lock))
214 if (notes->src == NULL && symbol__alloc_hist(sym) < 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 err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
225 pthread_mutex_unlock(¬es->lock);
227 if (err == -ERANGE && !he->ms.map->erange_warned)
228 ui__warn_map_erange(he->ms.map, sym, ip);
231 static void perf_top__show_details(struct perf_top *top)
233 struct hist_entry *he = top->sym_filter_entry;
234 struct annotation *notes;
235 struct symbol *symbol;
242 notes = symbol__annotation(symbol);
244 pthread_mutex_lock(¬es->lock);
246 if (notes->src == NULL)
249 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
250 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
252 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
253 0, top->sym_pcnt_filter, top->print_entries, 4);
255 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
257 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
259 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
261 pthread_mutex_unlock(¬es->lock);
264 static const char CONSOLE_CLEAR[] = "
\e[H
\e[2J";
266 static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
267 struct addr_location *al,
268 struct perf_sample *sample)
270 struct hist_entry *he;
272 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
276 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
280 static void perf_top__print_sym_table(struct perf_top *top)
284 const int win_width = top->winsize.ws_col - 1;
288 perf_top__header_snprintf(top, bf, sizeof(bf));
291 perf_top__reset_sample_counters(top);
293 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
295 if (top->sym_evsel->hists.stats.nr_lost_warned !=
296 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
297 top->sym_evsel->hists.stats.nr_lost_warned =
298 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
299 color_fprintf(stdout, PERF_COLOR_RED,
300 "WARNING: LOST %d chunks, Check IO/CPU overload",
301 top->sym_evsel->hists.stats.nr_lost_warned);
305 if (top->sym_filter_entry) {
306 perf_top__show_details(top);
310 hists__collapse_resort_threaded(&top->sym_evsel->hists);
311 hists__output_resort_threaded(&top->sym_evsel->hists);
312 hists__decay_entries_threaded(&top->sym_evsel->hists,
313 top->hide_user_symbols,
314 top->hide_kernel_symbols);
315 hists__output_recalc_col_len(&top->sym_evsel->hists,
316 top->winsize.ws_row - 3);
318 hists__fprintf(&top->sym_evsel->hists, NULL, false, false,
319 top->winsize.ws_row - 4 - printed, win_width, stdout);
322 static void prompt_integer(int *target, const char *msg)
324 char *buf = malloc(0), *p;
328 fprintf(stdout, "\n%s: ", msg);
329 if (getline(&buf, &dummy, stdin) < 0)
332 p = strchr(buf, '\n');
342 tmp = strtoul(buf, NULL, 10);
348 static void prompt_percent(int *target, const char *msg)
352 prompt_integer(&tmp, msg);
353 if (tmp >= 0 && tmp <= 100)
357 static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
359 char *buf = malloc(0), *p;
360 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
361 struct rb_node *next;
364 /* zero counters of active symbol */
366 __zero_source_counters(syme);
367 top->sym_filter_entry = NULL;
370 fprintf(stdout, "\n%s: ", msg);
371 if (getline(&buf, &dummy, stdin) < 0)
374 p = strchr(buf, '\n');
378 next = rb_first(&top->sym_evsel->hists.entries);
380 n = rb_entry(next, struct hist_entry, rb_node);
381 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
385 next = rb_next(&n->rb_node);
389 fprintf(stderr, "Sorry, %s is not active.\n", buf);
392 perf_top__parse_source(top, found);
398 static void perf_top__print_mapped_keys(struct perf_top *top)
402 if (top->sym_filter_entry) {
403 struct symbol *sym = top->sym_filter_entry->ms.sym;
407 fprintf(stdout, "\nMapped keys:\n");
408 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
409 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
411 if (top->evlist->nr_entries > 1)
412 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
414 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
416 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
417 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
418 fprintf(stdout, "\t[S] stop annotation.\n");
421 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
422 top->hide_kernel_symbols ? "yes" : "no");
424 "\t[U] hide user symbols. \t(%s)\n",
425 top->hide_user_symbols ? "yes" : "no");
426 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
427 fprintf(stdout, "\t[qQ] quit.\n");
430 static int perf_top__key_mapped(struct perf_top *top, int c)
446 return top->evlist->nr_entries > 1 ? 1 : 0;
454 static void perf_top__handle_keypress(struct perf_top *top, int c)
456 if (!perf_top__key_mapped(top, c)) {
457 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
458 struct termios tc, save;
460 perf_top__print_mapped_keys(top);
461 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
466 tc.c_lflag &= ~(ICANON | ECHO);
469 tcsetattr(0, TCSANOW, &tc);
471 poll(&stdin_poll, 1, -1);
474 tcsetattr(0, TCSAFLUSH, &save);
475 if (!perf_top__key_mapped(top, c))
481 prompt_integer(&top->delay_secs, "Enter display delay");
482 if (top->delay_secs < 1)
486 prompt_integer(&top->print_entries, "Enter display entries (lines)");
487 if (top->print_entries == 0) {
488 struct sigaction act = {
489 .sa_sigaction = perf_top__sig_winch,
490 .sa_flags = SA_SIGINFO,
492 perf_top__sig_winch(SIGWINCH, NULL, top);
493 sigaction(SIGWINCH, &act, NULL);
495 perf_top__sig_winch(SIGWINCH, NULL, top);
496 signal(SIGWINCH, SIG_DFL);
500 if (top->evlist->nr_entries > 1) {
501 /* Select 0 as the default event: */
504 fprintf(stderr, "\nAvailable events:");
506 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
507 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
509 prompt_integer(&counter, "Enter details event counter");
511 if (counter >= top->evlist->nr_entries) {
512 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
513 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
517 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
518 if (top->sym_evsel->idx == counter)
521 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
524 prompt_integer(&top->count_filter, "Enter display event count filter");
527 prompt_percent(&top->sym_pcnt_filter,
528 "Enter details display event filter (percent)");
531 top->hide_kernel_symbols = !top->hide_kernel_symbols;
535 printf("exiting.\n");
536 if (top->dump_symtab)
537 perf_session__fprintf_dsos(top->session, stderr);
540 perf_top__prompt_symbol(top, "Enter details symbol");
543 if (!top->sym_filter_entry)
546 struct hist_entry *syme = top->sym_filter_entry;
548 top->sym_filter_entry = NULL;
549 __zero_source_counters(syme);
553 top->hide_user_symbols = !top->hide_user_symbols;
556 top->zero = !top->zero;
563 static void perf_top__sort_new_samples(void *arg)
565 struct perf_top *t = arg;
566 perf_top__reset_sample_counters(t);
568 if (t->evlist->selected != NULL)
569 t->sym_evsel = t->evlist->selected;
571 hists__collapse_resort_threaded(&t->sym_evsel->hists);
572 hists__output_resort_threaded(&t->sym_evsel->hists);
573 hists__decay_entries_threaded(&t->sym_evsel->hists,
574 t->hide_user_symbols,
575 t->hide_kernel_symbols);
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";
584 perf_top__sort_new_samples(top);
587 * Initialize the uid_filter_str, in the future the TUI will allow
588 * Zooming in/out UIDs. For now juse use whatever the user passed
591 list_for_each_entry(pos, &top->evlist->entries, node)
592 pos->hists.uid_filter_str = top->target.uid_str;
594 perf_evlist__tui_browse_hists(top->evlist, help,
595 perf_top__sort_new_samples,
596 top, top->delay_secs);
603 static void *display_thread(void *arg)
605 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
606 struct termios tc, save;
607 struct perf_top *top = arg;
612 tc.c_lflag &= ~(ICANON | ECHO);
616 pthread__unblock_sigwinch();
618 delay_msecs = top->delay_secs * 1000;
619 tcsetattr(0, TCSANOW, &tc);
624 perf_top__print_sym_table(top);
626 * Either timeout expired or we got an EINTR due to SIGWINCH,
627 * refresh screen in both cases.
629 switch (poll(&stdin_poll, 1, delay_msecs)) {
642 tcsetattr(0, TCSAFLUSH, &save);
644 perf_top__handle_keypress(top, c);
650 /* Tag samples to be skipped. */
651 static const char *skip_symbols[] = {
659 "mwait_idle_with_hints",
661 "ppc64_runlatch_off",
662 "pseries_dedicated_idle_sleep",
666 static int symbol_filter(struct map *map __used, struct symbol *sym)
668 const char *name = sym->name;
672 * ppc64 uses function descriptors and appends a '.' to the
673 * start of every instruction address. Remove it.
678 if (!strcmp(name, "_text") ||
679 !strcmp(name, "_etext") ||
680 !strcmp(name, "_sinittext") ||
681 !strncmp("init_module", name, 11) ||
682 !strncmp("cleanup_module", name, 14) ||
683 strstr(name, "_text_start") ||
684 strstr(name, "_text_end"))
687 for (i = 0; skip_symbols[i]; i++) {
688 if (!strcmp(skip_symbols[i], name)) {
697 static void perf_event__process_sample(struct perf_tool *tool,
698 const union perf_event *event,
699 struct perf_evsel *evsel,
700 struct perf_sample *sample,
701 struct machine *machine)
703 struct perf_top *top = container_of(tool, struct perf_top, tool);
704 struct symbol *parent = NULL;
705 u64 ip = event->ip.ip;
706 struct addr_location al;
709 if (!machine && perf_guest) {
710 static struct intlist *seen;
713 seen = intlist__new();
715 if (!intlist__has_entry(seen, event->ip.pid)) {
716 pr_err("Can't find guest [%d]'s kernel information\n",
718 intlist__add(seen, event->ip.pid);
724 pr_err("%u unprocessable samples recorded.",
725 top->session->hists.stats.nr_unprocessable_samples++);
729 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
730 top->exact_samples++;
732 if (perf_event__preprocess_sample(event, machine, &al, sample,
733 symbol_filter) < 0 ||
737 if (!top->kptr_restrict_warned &&
738 symbol_conf.kptr_restrict &&
739 al.cpumode == PERF_RECORD_MISC_KERNEL) {
741 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
742 "Check /proc/sys/kernel/kptr_restrict.\n\n"
743 "Kernel%s samples will not be resolved.\n",
744 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
746 if (use_browser <= 0)
748 top->kptr_restrict_warned = true;
751 if (al.sym == NULL) {
752 const char *msg = "Kernel samples will not be resolved.\n";
754 * As we do lazy loading of symtabs we only will know if the
755 * specified vmlinux file is invalid when we actually have a
756 * hit in kernel space and then try to load it. So if we get
757 * here and there are _no_ symbols in the DSO backing the
758 * kernel map, bail out.
760 * We may never get here, for instance, if we use -K/
761 * --hide-kernel-symbols, even if the user specifies an
762 * invalid --vmlinux ;-)
764 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
765 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
766 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
767 if (symbol_conf.vmlinux_name) {
768 ui__warning("The %s file can't be used.\n%s",
769 symbol_conf.vmlinux_name, msg);
771 ui__warning("A vmlinux file was not found.\n%s",
775 if (use_browser <= 0)
777 top->vmlinux_warned = true;
781 if (al.sym == NULL || !al.sym->ignore) {
782 struct hist_entry *he;
784 if ((sort__has_parent || symbol_conf.use_callchain) &&
786 err = machine__resolve_callchain(machine, evsel,
794 he = perf_evsel__add_hist_entry(evsel, &al, sample);
796 pr_err("Problem incrementing symbol period, skipping event\n");
800 if (symbol_conf.use_callchain) {
801 err = callchain_append(he->callchain, &callchain_cursor,
807 if (top->sort_has_symbols)
808 perf_top__record_precise_ip(top, he, evsel->idx, ip);
814 static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
816 struct perf_sample sample;
817 struct perf_evsel *evsel;
818 struct perf_session *session = top->session;
819 union perf_event *event;
820 struct machine *machine;
824 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
825 ret = perf_evlist__parse_sample(top->evlist, event, &sample, false);
827 pr_err("Can't parse sample, err = %d\n", ret);
831 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
832 assert(evsel != NULL);
834 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
836 if (event->header.type == PERF_RECORD_SAMPLE)
840 case PERF_RECORD_MISC_USER:
842 if (top->hide_user_symbols)
844 machine = perf_session__find_host_machine(session);
846 case PERF_RECORD_MISC_KERNEL:
847 ++top->kernel_samples;
848 if (top->hide_kernel_symbols)
850 machine = perf_session__find_host_machine(session);
852 case PERF_RECORD_MISC_GUEST_KERNEL:
853 ++top->guest_kernel_samples;
854 machine = perf_session__find_machine(session, event->ip.pid);
856 case PERF_RECORD_MISC_GUEST_USER:
857 ++top->guest_us_samples;
859 * TODO: we don't process guest user from host side
860 * except simple counting.
868 if (event->header.type == PERF_RECORD_SAMPLE) {
869 perf_event__process_sample(&top->tool, event, evsel,
871 } else if (event->header.type < PERF_RECORD_MAX) {
872 hists__inc_nr_events(&evsel->hists, event->header.type);
873 perf_event__process(&top->tool, event, &sample, machine);
875 ++session->hists.stats.nr_unknown_events;
879 static void perf_top__mmap_read(struct perf_top *top)
883 for (i = 0; i < top->evlist->nr_mmaps; i++)
884 perf_top__mmap_read_idx(top, i);
887 static void perf_top__start_counters(struct perf_top *top)
889 struct perf_evsel *counter, *first;
890 struct perf_evlist *evlist = top->evlist;
892 first = list_entry(evlist->entries.next, struct perf_evsel, node);
894 list_for_each_entry(counter, &evlist->entries, node) {
895 struct perf_event_attr *attr = &counter->attr;
896 struct xyarray *group_fd = NULL;
898 if (top->group && counter != first)
899 group_fd = first->fd;
901 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
904 attr->sample_type |= PERF_SAMPLE_PERIOD;
906 attr->sample_freq = top->freq;
909 if (evlist->nr_entries > 1) {
910 attr->sample_type |= PERF_SAMPLE_ID;
911 attr->read_format |= PERF_FORMAT_ID;
914 if (perf_target__has_cpu(&top->target))
915 attr->sample_type |= PERF_SAMPLE_CPU;
917 if (symbol_conf.use_callchain)
918 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
922 attr->inherit = top->inherit;
923 fallback_missing_features:
924 if (top->exclude_guest_missing)
925 attr->exclude_guest = attr->exclude_host = 0;
927 attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
929 if (perf_evsel__open(counter, top->evlist->cpus,
930 top->evlist->threads, top->group,
934 if (err == EPERM || err == EACCES) {
935 ui__error_paranoid();
937 } else if (err == EINVAL) {
938 if (!top->exclude_guest_missing &&
939 (attr->exclude_guest || attr->exclude_host)) {
940 pr_debug("Old kernel, cannot exclude "
941 "guest or host samples.\n");
942 top->exclude_guest_missing = true;
943 goto fallback_missing_features;
944 } else if (!top->sample_id_all_missing) {
946 * Old kernel, no attr->sample_id_type_all field
948 top->sample_id_all_missing = true;
949 goto retry_sample_id;
953 * If it's cycles then fall back to hrtimer
954 * based cpu-clock-tick sw counter, which
955 * is always available even if no PMU support:
957 if ((err == ENOENT || err == ENXIO) &&
958 (attr->type == PERF_TYPE_HARDWARE) &&
959 (attr->config == PERF_COUNT_HW_CPU_CYCLES)) {
962 ui__warning("Cycles event not supported,\n"
963 "trying to fall back to cpu-clock-ticks\n");
965 attr->type = PERF_TYPE_SOFTWARE;
966 attr->config = PERF_COUNT_SW_CPU_CLOCK;
969 counter->name = NULL;
975 ui__error("The %s event is not supported.\n",
976 perf_evsel__name(counter));
978 } else if (err == EMFILE) {
979 ui__error("Too many events are opened.\n"
980 "Try again after reducing the number of events\n");
984 ui__error("The sys_perf_event_open() syscall "
985 "returned with %d (%s). /bin/dmesg "
986 "may provide additional information.\n"
987 "No CONFIG_PERF_EVENTS=y kernel support "
988 "configured?\n", err, strerror(err));
993 if (perf_evlist__mmap(evlist, top->mmap_pages, false) < 0) {
994 ui__error("Failed to mmap with %d (%s)\n",
995 errno, strerror(errno));
1006 static int perf_top__setup_sample_type(struct perf_top *top)
1008 if (!top->sort_has_symbols) {
1009 if (symbol_conf.use_callchain) {
1010 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
1013 } else if (!top->dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
1014 if (callchain_register_param(&callchain_param) < 0) {
1015 ui__error("Can't register callchain params.\n");
1023 static int __cmd_top(struct perf_top *top)
1028 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1029 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1031 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1032 if (top->session == NULL)
1035 ret = perf_top__setup_sample_type(top);
1039 if (perf_target__has_task(&top->target))
1040 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
1041 perf_event__process,
1042 &top->session->host_machine);
1044 perf_event__synthesize_threads(&top->tool, perf_event__process,
1045 &top->session->host_machine);
1046 perf_top__start_counters(top);
1047 top->session->evlist = top->evlist;
1048 perf_session__set_id_hdr_size(top->session);
1050 /* Wait for a minimal set of events before starting the snapshot */
1051 poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1053 perf_top__mmap_read(top);
1055 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1056 display_thread), top)) {
1057 ui__error("Could not create display thread.\n");
1061 if (top->realtime_prio) {
1062 struct sched_param param;
1064 param.sched_priority = top->realtime_prio;
1065 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1066 ui__error("Could not set realtime priority.\n");
1072 u64 hits = top->samples;
1074 perf_top__mmap_read(top);
1076 if (hits == top->samples)
1077 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1081 perf_session__delete(top->session);
1082 top->session = NULL;
1088 parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1090 struct perf_top *top = (struct perf_top *)opt->value;
1098 top->dont_use_callchains = true;
1102 symbol_conf.use_callchain = true;
1107 tok = strtok((char *)arg, ",");
1111 /* get the output mode */
1112 if (!strncmp(tok, "graph", strlen(arg)))
1113 callchain_param.mode = CHAIN_GRAPH_ABS;
1115 else if (!strncmp(tok, "flat", strlen(arg)))
1116 callchain_param.mode = CHAIN_FLAT;
1118 else if (!strncmp(tok, "fractal", strlen(arg)))
1119 callchain_param.mode = CHAIN_GRAPH_REL;
1121 else if (!strncmp(tok, "none", strlen(arg))) {
1122 callchain_param.mode = CHAIN_NONE;
1123 symbol_conf.use_callchain = false;
1129 /* get the min percentage */
1130 tok = strtok(NULL, ",");
1134 callchain_param.min_percent = strtod(tok, &endptr);
1138 /* get the print limit */
1139 tok2 = strtok(NULL, ",");
1143 if (tok2[0] != 'c') {
1144 callchain_param.print_limit = strtod(tok2, &endptr);
1145 tok2 = strtok(NULL, ",");
1150 /* get the call chain order */
1151 if (!strcmp(tok2, "caller"))
1152 callchain_param.order = ORDER_CALLER;
1153 else if (!strcmp(tok2, "callee"))
1154 callchain_param.order = ORDER_CALLEE;
1158 if (callchain_register_param(&callchain_param) < 0) {
1159 fprintf(stderr, "Can't register callchain params\n");
1165 static const char * const top_usage[] = {
1166 "perf top [<options>]",
1170 int cmd_top(int argc, const char **argv, const char *prefix __used)
1172 struct perf_evsel *pos;
1174 char errbuf[BUFSIZ];
1175 struct perf_top top = {
1178 .freq = 4000, /* 4 KHz */
1180 .sym_pcnt_filter = 5,
1185 char callchain_default_opt[] = "fractal,0.5,callee";
1186 const struct option options[] = {
1187 OPT_CALLBACK('e', "event", &top.evlist, "event",
1188 "event selector. use 'perf list' to list available events",
1189 parse_events_option),
1190 OPT_INTEGER('c', "count", &top.default_interval,
1191 "event period to sample"),
1192 OPT_STRING('p', "pid", &top.target.pid, "pid",
1193 "profile events on existing process id"),
1194 OPT_STRING('t', "tid", &top.target.tid, "tid",
1195 "profile events on existing thread id"),
1196 OPT_BOOLEAN('a', "all-cpus", &top.target.system_wide,
1197 "system-wide collection from all CPUs"),
1198 OPT_STRING('C', "cpu", &top.target.cpu_list, "cpu",
1199 "list of cpus to monitor"),
1200 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1201 "file", "vmlinux pathname"),
1202 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1203 "hide kernel symbols"),
1204 OPT_UINTEGER('m', "mmap-pages", &top.mmap_pages, "number of mmap data pages"),
1205 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1206 "collect data with this RT SCHED_FIFO priority"),
1207 OPT_INTEGER('d', "delay", &top.delay_secs,
1208 "number of seconds to delay between refreshes"),
1209 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1210 "dump the symbol table used for profiling"),
1211 OPT_INTEGER('f', "count-filter", &top.count_filter,
1212 "only display functions with more events than this"),
1213 OPT_BOOLEAN('g', "group", &top.group,
1214 "put the counters into a counter group"),
1215 OPT_BOOLEAN('i', "inherit", &top.inherit,
1216 "child tasks inherit counters"),
1217 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1218 "symbol to annotate"),
1219 OPT_BOOLEAN('z', "zero", &top.zero,
1220 "zero history across updates"),
1221 OPT_INTEGER('F', "freq", &top.freq,
1222 "profile at this frequency"),
1223 OPT_INTEGER('E', "entries", &top.print_entries,
1224 "display this many functions"),
1225 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1226 "hide user symbols"),
1227 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1228 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1229 OPT_INCR('v', "verbose", &verbose,
1230 "be more verbose (show counter open errors, etc)"),
1231 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1232 "sort by key(s): pid, comm, dso, symbol, parent"),
1233 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1234 "Show a column with the number of samples"),
1235 OPT_CALLBACK_DEFAULT('G', "call-graph", &top, "output_type,min_percent, call_order",
1236 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1237 "Default: fractal,0.5,callee", &parse_callchain_opt,
1238 callchain_default_opt),
1239 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1240 "Show a column with the sum of periods"),
1241 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1242 "only consider symbols in these dsos"),
1243 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1244 "only consider symbols in these comms"),
1245 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1246 "only consider these symbols"),
1247 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1248 "Interleave source code with assembly code (default)"),
1249 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1250 "Display raw encoding of assembly instructions (default)"),
1251 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1252 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1253 OPT_STRING('u', "uid", &top.target.uid_str, "user", "user to profile"),
1257 top.evlist = perf_evlist__new(NULL, NULL);
1258 if (top.evlist == NULL)
1261 symbol_conf.exclude_other = false;
1263 argc = parse_options(argc, argv, options, top_usage, 0);
1265 usage_with_options(top_usage, options);
1267 if (sort_order == default_sort_order)
1268 sort_order = "dso,symbol";
1270 setup_sorting(top_usage, options);
1274 else if (top.use_tui)
1277 setup_browser(false);
1279 status = perf_target__validate(&top.target);
1281 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1282 ui__warning("%s", errbuf);
1285 status = perf_target__parse_uid(&top.target);
1287 int saved_errno = errno;
1289 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1290 ui__error("%s", errbuf);
1292 status = -saved_errno;
1293 goto out_delete_evlist;
1296 if (perf_target__none(&top.target))
1297 top.target.system_wide = true;
1299 if (perf_evlist__create_maps(top.evlist, &top.target) < 0)
1300 usage_with_options(top_usage, options);
1302 if (!top.evlist->nr_entries &&
1303 perf_evlist__add_default(top.evlist) < 0) {
1304 ui__error("Not enough memory for event selector list\n");
1308 symbol_conf.nr_events = top.evlist->nr_entries;
1310 if (top.delay_secs < 1)
1314 * User specified count overrides default frequency.
1316 if (top.default_interval)
1318 else if (top.freq) {
1319 top.default_interval = top.freq;
1321 ui__error("frequency and count are zero, aborting\n");
1325 list_for_each_entry(pos, &top.evlist->entries, node) {
1327 * Fill in the ones not specifically initialized via -c:
1329 if (!pos->attr.sample_period)
1330 pos->attr.sample_period = top.default_interval;
1333 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1335 symbol_conf.priv_size = sizeof(struct annotation);
1337 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1338 if (symbol__init() < 0)
1341 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1342 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1343 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1346 * Avoid annotation data structures overhead when symbols aren't on the
1349 top.sort_has_symbols = sort_sym.list.next != NULL;
1351 get_term_dimensions(&top.winsize);
1352 if (top.print_entries == 0) {
1353 struct sigaction act = {
1354 .sa_sigaction = perf_top__sig_winch,
1355 .sa_flags = SA_SIGINFO,
1357 perf_top__update_print_entries(&top);
1358 sigaction(SIGWINCH, &act, NULL);
1361 status = __cmd_top(&top);
1364 perf_evlist__delete(top.evlist);