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>
9 * Improvements and fixes by:
11 * Arjan van de Ven <arjan@linux.intel.com>
12 * Yanmin Zhang <yanmin.zhang@intel.com>
13 * Wu Fengguang <fengguang.wu@intel.com>
14 * Mike Galbraith <efault@gmx.de>
15 * Paul Mackerras <paulus@samba.org>
17 * Released under the GPL v2. (and only v2, not any later version)
23 #include "util/color.h"
24 #include "util/evsel.h"
25 #include "util/session.h"
26 #include "util/symbol.h"
27 #include "util/thread.h"
28 #include "util/util.h"
29 #include <linux/rbtree.h>
30 #include "util/parse-options.h"
31 #include "util/parse-events.h"
32 #include "util/cpumap.h"
33 #include "util/xyarray.h"
35 #include "util/debug.h"
50 #include <sys/syscall.h>
51 #include <sys/ioctl.h>
53 #include <sys/prctl.h>
58 #include <linux/unistd.h>
59 #include <linux/types.h>
61 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
63 static bool system_wide = false;
65 static int default_interval = 0;
67 static int count_filter = 5;
68 static int print_entries;
70 static int target_pid = -1;
71 static int target_tid = -1;
72 static struct thread_map *threads;
73 static bool inherit = false;
74 static struct cpu_map *cpus;
75 static int realtime_prio = 0;
76 static bool group = false;
77 static unsigned int page_size;
78 static unsigned int mmap_pages = 16;
79 static int freq = 1000; /* 1 KHz */
81 static int delay_secs = 2;
82 static bool zero = false;
83 static bool dump_symtab = false;
85 static bool hide_kernel_symbols = false;
86 static bool hide_user_symbols = false;
87 static struct winsize winsize;
95 unsigned long count[MAX_COUNTERS];
97 struct source_line *next;
100 static const char *sym_filter = NULL;
101 struct sym_entry *sym_filter_entry = NULL;
102 struct sym_entry *sym_filter_entry_sched = NULL;
103 static int sym_pcnt_filter = 5;
104 static int sym_counter = 0;
105 static struct perf_evsel *sym_evsel = NULL;
106 static int display_weighted = -1;
107 static const char *cpu_list;
113 struct sym_entry_source {
114 struct source_line *source;
115 struct source_line *lines;
116 struct source_line **lines_tail;
117 pthread_mutex_t lock;
121 struct rb_node rb_node;
122 struct list_head node;
123 unsigned long snap_count;
129 struct sym_entry_source *src;
130 unsigned long count[0];
137 static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
139 return ((void *)self) + symbol_conf.priv_size;
142 void get_term_dimensions(struct winsize *ws)
144 char *s = getenv("LINES");
147 ws->ws_row = atoi(s);
148 s = getenv("COLUMNS");
150 ws->ws_col = atoi(s);
151 if (ws->ws_row && ws->ws_col)
156 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
157 ws->ws_row && ws->ws_col)
164 static void update_print_entries(struct winsize *ws)
166 print_entries = ws->ws_row;
168 if (print_entries > 9)
172 static void sig_winch_handler(int sig __used)
174 get_term_dimensions(&winsize);
175 update_print_entries(&winsize);
178 static int parse_source(struct sym_entry *syme)
181 struct sym_entry_source *source;
184 char command[PATH_MAX*2];
191 sym = sym_entry__symbol(syme);
195 * We can't annotate with just /proc/kallsyms
197 if (map->dso->origin == DSO__ORIG_KERNEL)
200 if (syme->src == NULL) {
201 syme->src = zalloc(sizeof(*source));
202 if (syme->src == NULL)
204 pthread_mutex_init(&syme->src->lock, NULL);
210 pthread_mutex_lock(&source->lock);
213 path = map->dso->long_name;
215 len = sym->end - sym->start;
218 "objdump --start-address=%#0*" PRIx64 " --stop-address=%#0*" PRIx64 " -dS %s",
219 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
220 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
222 file = popen(command, "r");
226 pthread_mutex_lock(&source->lock);
227 source->lines_tail = &source->lines;
228 while (!feof(file)) {
229 struct source_line *src;
233 src = malloc(sizeof(struct source_line));
235 memset(src, 0, sizeof(struct source_line));
237 if (getline(&src->line, &dummy, file) < 0)
242 c = strchr(src->line, '\n');
247 *source->lines_tail = src;
248 source->lines_tail = &src->next;
250 src->eip = strtoull(src->line, &sep, 16);
252 src->eip = map__objdump_2ip(map, src->eip);
253 else /* this line has no ip info (e.g. source line) */
258 sym_filter_entry = syme;
259 pthread_mutex_unlock(&source->lock);
263 static void __zero_source_counters(struct sym_entry *syme)
266 struct source_line *line;
268 line = syme->src->lines;
270 for (i = 0; i < nr_counters; i++)
276 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
278 struct source_line *line;
280 if (syme != sym_filter_entry)
283 if (pthread_mutex_trylock(&syme->src->lock))
286 if (syme->src == NULL || syme->src->source == NULL)
289 for (line = syme->src->lines; line; line = line->next) {
290 /* skip lines without IP info */
293 if (line->eip == ip) {
294 line->count[counter]++;
301 pthread_mutex_unlock(&syme->src->lock);
304 #define PATTERN_LEN (BITS_PER_LONG / 4 + 2)
306 static void lookup_sym_source(struct sym_entry *syme)
308 struct symbol *symbol = sym_entry__symbol(syme);
309 struct source_line *line;
310 char pattern[PATTERN_LEN + 1];
312 sprintf(pattern, "%0*" PRIx64 " <", BITS_PER_LONG / 4,
313 map__rip_2objdump(syme->map, symbol->start));
315 pthread_mutex_lock(&syme->src->lock);
316 for (line = syme->src->lines; line; line = line->next) {
317 if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
318 syme->src->source = line;
322 pthread_mutex_unlock(&syme->src->lock);
325 static void show_lines(struct source_line *queue, int count, int total)
328 struct source_line *line;
331 for (i = 0; i < count; i++) {
332 float pcnt = 100.0*(float)line->count[sym_counter]/(float)total;
334 printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line);
339 #define TRACE_COUNT 3
341 static void show_details(struct sym_entry *syme)
343 struct symbol *symbol;
344 struct source_line *line;
345 struct source_line *line_queue = NULL;
347 int line_queue_count = 0, total = 0, more = 0;
352 if (!syme->src->source)
353 lookup_sym_source(syme);
355 if (!syme->src->source)
358 symbol = sym_entry__symbol(syme);
359 printf("Showing %s for %s\n", event_name(sym_evsel), symbol->name);
360 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
362 pthread_mutex_lock(&syme->src->lock);
363 line = syme->src->source;
365 total += line->count[sym_counter];
369 line = syme->src->source;
373 if (!line_queue_count)
377 if (line->count[sym_counter])
378 pcnt = 100.0 * line->count[sym_counter] / (float)total;
379 if (pcnt >= (float)sym_pcnt_filter) {
380 if (displayed <= print_entries)
381 show_lines(line_queue, line_queue_count, total);
383 displayed += line_queue_count;
384 line_queue_count = 0;
386 } else if (line_queue_count > TRACE_COUNT) {
387 line_queue = line_queue->next;
391 line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
394 pthread_mutex_unlock(&syme->src->lock);
396 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
400 * Symbols will be added here in event__process_sample and will get out
403 static LIST_HEAD(active_symbols);
404 static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
407 * Ordering weight: count-1 * count-2 * ... / count-n
409 static double sym_weight(const struct sym_entry *sym)
411 double weight = sym->snap_count;
414 if (!display_weighted)
417 for (counter = 1; counter < nr_counters-1; counter++)
418 weight *= sym->count[counter];
420 weight /= (sym->count[counter] + 1);
426 static long kernel_samples, us_samples;
427 static long exact_samples;
428 static long guest_us_samples, guest_kernel_samples;
429 static const char CONSOLE_CLEAR[] = "
\e[H
\e[2J";
431 static void __list_insert_active_sym(struct sym_entry *syme)
433 list_add(&syme->node, &active_symbols);
436 static void list_remove_active_sym(struct sym_entry *syme)
438 pthread_mutex_lock(&active_symbols_lock);
439 list_del_init(&syme->node);
440 pthread_mutex_unlock(&active_symbols_lock);
443 static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
445 struct rb_node **p = &tree->rb_node;
446 struct rb_node *parent = NULL;
447 struct sym_entry *iter;
451 iter = rb_entry(parent, struct sym_entry, rb_node);
453 if (se->weight > iter->weight)
459 rb_link_node(&se->rb_node, parent, p);
460 rb_insert_color(&se->rb_node, tree);
463 static void print_sym_table(void)
466 struct perf_evsel *counter;
467 int snap = !display_weighted ? sym_counter : 0;
468 float samples_per_sec = samples/delay_secs;
469 float ksamples_per_sec = kernel_samples/delay_secs;
470 float us_samples_per_sec = (us_samples)/delay_secs;
471 float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
472 float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
473 float esamples_percent = (100.0*exact_samples)/samples;
474 float sum_ksamples = 0.0;
475 struct sym_entry *syme, *n;
476 struct rb_root tmp = RB_ROOT;
478 int sym_width = 0, dso_width = 0, dso_short_width = 0;
479 const int win_width = winsize.ws_col - 1;
481 samples = us_samples = kernel_samples = exact_samples = 0;
482 guest_kernel_samples = guest_us_samples = 0;
484 /* Sort the active symbols */
485 pthread_mutex_lock(&active_symbols_lock);
486 syme = list_entry(active_symbols.next, struct sym_entry, node);
487 pthread_mutex_unlock(&active_symbols_lock);
489 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
490 syme->snap_count = syme->count[snap];
491 if (syme->snap_count != 0) {
493 if ((hide_user_symbols &&
494 syme->origin == PERF_RECORD_MISC_USER) ||
495 (hide_kernel_symbols &&
496 syme->origin == PERF_RECORD_MISC_KERNEL)) {
497 list_remove_active_sym(syme);
500 syme->weight = sym_weight(syme);
501 rb_insert_active_sym(&tmp, syme);
502 sum_ksamples += syme->snap_count;
504 for (j = 0; j < nr_counters; j++)
505 syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
507 list_remove_active_sym(syme);
512 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
514 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
517 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
521 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
522 " guest kernel:%4.1f%% guest us:%4.1f%%"
525 100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
527 100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
529 100.0 - (100.0 * ((samples_per_sec -
530 guest_kernel_samples_per_sec) /
532 100.0 - (100.0 * ((samples_per_sec -
533 guest_us_samples_per_sec) /
538 if (nr_counters == 1 || !display_weighted) {
539 struct perf_evsel *first;
540 first = list_entry(evsel_list.next, struct perf_evsel, node);
541 printf("%" PRIu64, (uint64_t)first->attr.sample_period);
548 if (!display_weighted)
549 printf("%s", event_name(sym_evsel));
550 else list_for_each_entry(counter, &evsel_list, node) {
554 printf("%s", event_name(counter));
559 if (target_pid != -1)
560 printf(" (target_pid: %d", target_pid);
561 else if (target_tid != -1)
562 printf(" (target_tid: %d", target_tid);
567 printf(", CPU%s: %s)\n", cpus->nr > 1 ? "s" : "", cpu_list);
569 if (target_tid != -1)
572 printf(", %d CPU%s)\n", cpus->nr, cpus->nr > 1 ? "s" : "");
575 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
577 if (sym_filter_entry) {
578 show_details(sym_filter_entry);
583 * Find the longest symbol name that will be displayed
585 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
586 syme = rb_entry(nd, struct sym_entry, rb_node);
587 if (++printed > print_entries ||
588 (int)syme->snap_count < count_filter)
591 if (syme->map->dso->long_name_len > dso_width)
592 dso_width = syme->map->dso->long_name_len;
594 if (syme->map->dso->short_name_len > dso_short_width)
595 dso_short_width = syme->map->dso->short_name_len;
597 if (syme->name_len > sym_width)
598 sym_width = syme->name_len;
603 if (sym_width + dso_width > winsize.ws_col - 29) {
604 dso_width = dso_short_width;
605 if (sym_width + dso_width > winsize.ws_col - 29)
606 sym_width = winsize.ws_col - dso_width - 29;
609 if (nr_counters == 1)
610 printf(" samples pcnt");
612 printf(" weight samples pcnt");
616 printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
617 printf(" %s _______ _____",
618 nr_counters == 1 ? " " : "______");
620 printf(" ________________");
621 printf(" %-*.*s", sym_width, sym_width, graph_line);
622 printf(" %-*.*s", dso_width, dso_width, graph_line);
625 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
629 syme = rb_entry(nd, struct sym_entry, rb_node);
630 sym = sym_entry__symbol(syme);
631 if (++printed > print_entries || (int)syme->snap_count < count_filter)
634 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
637 if (nr_counters == 1 || !display_weighted)
638 printf("%20.2f ", syme->weight);
640 printf("%9.1f %10ld ", syme->weight, syme->snap_count);
642 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
644 printf(" %016" PRIx64, sym->start);
645 printf(" %-*.*s", sym_width, sym_width, sym->name);
646 printf(" %-*.*s\n", dso_width, dso_width,
647 dso_width >= syme->map->dso->long_name_len ?
648 syme->map->dso->long_name :
649 syme->map->dso->short_name);
653 static void prompt_integer(int *target, const char *msg)
655 char *buf = malloc(0), *p;
659 fprintf(stdout, "\n%s: ", msg);
660 if (getline(&buf, &dummy, stdin) < 0)
663 p = strchr(buf, '\n');
673 tmp = strtoul(buf, NULL, 10);
679 static void prompt_percent(int *target, const char *msg)
683 prompt_integer(&tmp, msg);
684 if (tmp >= 0 && tmp <= 100)
688 static void prompt_symbol(struct sym_entry **target, const char *msg)
690 char *buf = malloc(0), *p;
691 struct sym_entry *syme = *target, *n, *found = NULL;
694 /* zero counters of active symbol */
696 pthread_mutex_lock(&syme->src->lock);
697 __zero_source_counters(syme);
699 pthread_mutex_unlock(&syme->src->lock);
702 fprintf(stdout, "\n%s: ", msg);
703 if (getline(&buf, &dummy, stdin) < 0)
706 p = strchr(buf, '\n');
710 pthread_mutex_lock(&active_symbols_lock);
711 syme = list_entry(active_symbols.next, struct sym_entry, node);
712 pthread_mutex_unlock(&active_symbols_lock);
714 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
715 struct symbol *sym = sym_entry__symbol(syme);
717 if (!strcmp(buf, sym->name)) {
724 fprintf(stderr, "Sorry, %s is not active.\n", buf);
734 static void print_mapped_keys(void)
738 if (sym_filter_entry) {
739 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
743 fprintf(stdout, "\nMapped keys:\n");
744 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs);
745 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries);
748 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_evsel));
750 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
752 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
753 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
754 fprintf(stdout, "\t[S] stop annotation.\n");
757 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
760 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
761 hide_kernel_symbols ? "yes" : "no");
763 "\t[U] hide user symbols. \t(%s)\n",
764 hide_user_symbols ? "yes" : "no");
765 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
766 fprintf(stdout, "\t[qQ] quit.\n");
769 static int key_mapped(int c)
786 return nr_counters > 1 ? 1 : 0;
794 static void handle_keypress(struct perf_session *session, int c)
796 if (!key_mapped(c)) {
797 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
798 struct termios tc, save;
801 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
806 tc.c_lflag &= ~(ICANON | ECHO);
809 tcsetattr(0, TCSANOW, &tc);
811 poll(&stdin_poll, 1, -1);
814 tcsetattr(0, TCSAFLUSH, &save);
821 prompt_integer(&delay_secs, "Enter display delay");
826 prompt_integer(&print_entries, "Enter display entries (lines)");
827 if (print_entries == 0) {
828 sig_winch_handler(SIGWINCH);
829 signal(SIGWINCH, sig_winch_handler);
831 signal(SIGWINCH, SIG_DFL);
834 if (nr_counters > 1) {
835 fprintf(stderr, "\nAvailable events:");
837 list_for_each_entry(sym_evsel, &evsel_list, node)
838 fprintf(stderr, "\n\t%d %s", sym_evsel->idx, event_name(sym_evsel));
840 prompt_integer(&sym_counter, "Enter details event counter");
842 if (sym_counter >= nr_counters) {
843 sym_evsel = list_entry(evsel_list.next, struct perf_evsel, node);
845 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(sym_evsel));
849 list_for_each_entry(sym_evsel, &evsel_list, node)
850 if (sym_evsel->idx == sym_counter)
852 } else sym_counter = 0;
855 prompt_integer(&count_filter, "Enter display event count filter");
858 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
861 hide_kernel_symbols = !hide_kernel_symbols;
865 printf("exiting.\n");
867 perf_session__fprintf_dsos(session, stderr);
870 prompt_symbol(&sym_filter_entry, "Enter details symbol");
873 if (!sym_filter_entry)
876 struct sym_entry *syme = sym_filter_entry;
878 pthread_mutex_lock(&syme->src->lock);
879 sym_filter_entry = NULL;
880 __zero_source_counters(syme);
881 pthread_mutex_unlock(&syme->src->lock);
885 hide_user_symbols = !hide_user_symbols;
888 display_weighted = ~display_weighted;
898 static void *display_thread(void *arg __used)
900 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
901 struct termios tc, save;
903 struct perf_session *session = (struct perf_session *) arg;
907 tc.c_lflag &= ~(ICANON | ECHO);
912 delay_msecs = delay_secs * 1000;
913 tcsetattr(0, TCSANOW, &tc);
919 } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
922 tcsetattr(0, TCSAFLUSH, &save);
924 handle_keypress(session, c);
930 /* Tag samples to be skipped. */
931 static const char *skip_symbols[] = {
937 "mwait_idle_with_hints",
939 "ppc64_runlatch_off",
940 "pseries_dedicated_idle_sleep",
944 static int symbol_filter(struct map *map, struct symbol *sym)
946 struct sym_entry *syme;
947 const char *name = sym->name;
951 * ppc64 uses function descriptors and appends a '.' to the
952 * start of every instruction address. Remove it.
957 if (!strcmp(name, "_text") ||
958 !strcmp(name, "_etext") ||
959 !strcmp(name, "_sinittext") ||
960 !strncmp("init_module", name, 11) ||
961 !strncmp("cleanup_module", name, 14) ||
962 strstr(name, "_text_start") ||
963 strstr(name, "_text_end"))
966 syme = symbol__priv(sym);
970 if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
971 /* schedule initial sym_filter_entry setup */
972 sym_filter_entry_sched = syme;
976 for (i = 0; skip_symbols[i]; i++) {
977 if (!strcmp(skip_symbols[i], name)) {
984 syme->name_len = strlen(sym->name);
989 static void event__process_sample(const event_t *self,
990 struct sample_data *sample,
991 struct perf_session *session,
992 struct perf_evsel *evsel)
994 u64 ip = self->ip.ip;
995 struct sym_entry *syme;
996 struct addr_location al;
997 struct machine *machine;
998 u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
1003 case PERF_RECORD_MISC_USER:
1005 if (hide_user_symbols)
1007 machine = perf_session__find_host_machine(session);
1009 case PERF_RECORD_MISC_KERNEL:
1011 if (hide_kernel_symbols)
1013 machine = perf_session__find_host_machine(session);
1015 case PERF_RECORD_MISC_GUEST_KERNEL:
1016 ++guest_kernel_samples;
1017 machine = perf_session__find_machine(session, self->ip.pid);
1019 case PERF_RECORD_MISC_GUEST_USER:
1022 * TODO: we don't process guest user from host side
1023 * except simple counting.
1030 if (!machine && perf_guest) {
1031 pr_err("Can't find guest [%d]'s kernel information\n",
1036 if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
1039 if (event__preprocess_sample(self, session, &al, sample,
1040 symbol_filter) < 0 ||
1044 if (al.sym == NULL) {
1046 * As we do lazy loading of symtabs we only will know if the
1047 * specified vmlinux file is invalid when we actually have a
1048 * hit in kernel space and then try to load it. So if we get
1049 * here and there are _no_ symbols in the DSO backing the
1050 * kernel map, bail out.
1052 * We may never get here, for instance, if we use -K/
1053 * --hide-kernel-symbols, even if the user specifies an
1054 * invalid --vmlinux ;-)
1056 if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
1057 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
1058 pr_err("The %s file can't be used\n",
1059 symbol_conf.vmlinux_name);
1066 /* let's see, whether we need to install initial sym_filter_entry */
1067 if (sym_filter_entry_sched) {
1068 sym_filter_entry = sym_filter_entry_sched;
1069 sym_filter_entry_sched = NULL;
1070 if (parse_source(sym_filter_entry) < 0) {
1071 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
1073 pr_err("Can't annotate %s", sym->name);
1074 if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
1075 pr_err(": No vmlinux file was found in the path:\n");
1076 machine__fprintf_vmlinux_path(machine, stderr);
1083 syme = symbol__priv(al.sym);
1085 syme->count[evsel->idx]++;
1086 syme->origin = origin;
1087 record_precise_ip(syme, evsel->idx, ip);
1088 pthread_mutex_lock(&active_symbols_lock);
1089 if (list_empty(&syme->node) || !syme->node.next)
1090 __list_insert_active_sym(syme);
1091 pthread_mutex_unlock(&active_symbols_lock);
1101 static int perf_evsel__alloc_mmap_per_thread(struct perf_evsel *evsel,
1102 int ncpus, int nthreads)
1104 evsel->priv = xyarray__new(ncpus, nthreads, sizeof(struct mmap_data));
1105 return evsel->priv != NULL ? 0 : -ENOMEM;
1108 static void perf_evsel__free_mmap(struct perf_evsel *evsel)
1110 xyarray__delete(evsel->priv);
1114 static unsigned int mmap_read_head(struct mmap_data *md)
1116 struct perf_event_mmap_page *pc = md->base;
1119 head = pc->data_head;
1125 static void perf_session__mmap_read_counter(struct perf_session *self,
1126 struct perf_evsel *evsel,
1127 int cpu, int thread_idx)
1129 struct xyarray *mmap_array = evsel->priv;
1130 struct mmap_data *md = xyarray__entry(mmap_array, cpu, thread_idx);
1131 unsigned int head = mmap_read_head(md);
1132 unsigned int old = md->prev;
1133 unsigned char *data = md->base + page_size;
1134 struct sample_data sample;
1138 * If we're further behind than half the buffer, there's a chance
1139 * the writer will bite our tail and mess up the samples under us.
1141 * If we somehow ended up ahead of the head, we got messed up.
1143 * In either case, truncate and restart at head.
1146 if (diff > md->mask / 2 || diff < 0) {
1147 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
1150 * head points to a known good entry, start there.
1155 for (; old != head;) {
1156 event_t *event = (event_t *)&data[old & md->mask];
1160 size_t size = event->header.size;
1163 * Event straddles the mmap boundary -- header should always
1164 * be inside due to u64 alignment of output.
1166 if ((old & md->mask) + size != ((old + size) & md->mask)) {
1167 unsigned int offset = old;
1168 unsigned int len = min(sizeof(*event), size), cpy;
1169 void *dst = &event_copy;
1172 cpy = min(md->mask + 1 - (offset & md->mask), len);
1173 memcpy(dst, &data[offset & md->mask], cpy);
1179 event = &event_copy;
1182 event__parse_sample(event, self, &sample);
1183 if (event->header.type == PERF_RECORD_SAMPLE)
1184 event__process_sample(event, &sample, self, evsel);
1186 event__process(event, &sample, self);
1193 static struct pollfd *event_array;
1195 static void perf_session__mmap_read(struct perf_session *self)
1197 struct perf_evsel *counter;
1198 int i, thread_index;
1200 for (i = 0; i < cpus->nr; i++) {
1201 list_for_each_entry(counter, &evsel_list, node) {
1202 for (thread_index = 0;
1203 thread_index < threads->nr;
1205 perf_session__mmap_read_counter(self,
1206 counter, i, thread_index);
1215 static void start_counter(int i, struct perf_evsel *evsel)
1217 struct xyarray *mmap_array = evsel->priv;
1218 struct mmap_data *mm;
1219 struct perf_event_attr *attr;
1223 if (target_tid == -1)
1226 attr = &evsel->attr;
1228 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
1231 attr->sample_type |= PERF_SAMPLE_PERIOD;
1233 attr->sample_freq = freq;
1236 attr->inherit = (cpu < 0) && inherit;
1239 for (thread_index = 0; thread_index < threads->nr; thread_index++) {
1241 FD(evsel, i, thread_index) = sys_perf_event_open(attr,
1242 threads->map[thread_index], cpu, group_fd, 0);
1244 if (FD(evsel, i, thread_index) < 0) {
1247 if (err == EPERM || err == EACCES)
1248 die("Permission error - are you root?\n"
1249 "\t Consider tweaking"
1250 " /proc/sys/kernel/perf_event_paranoid.\n");
1252 * If it's cycles then fall back to hrtimer
1253 * based cpu-clock-tick sw counter, which
1254 * is always available even if no PMU support:
1256 if (attr->type == PERF_TYPE_HARDWARE
1257 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
1260 warning(" ... trying to fall back to cpu-clock-ticks\n");
1262 attr->type = PERF_TYPE_SOFTWARE;
1263 attr->config = PERF_COUNT_SW_CPU_CLOCK;
1267 error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
1268 FD(evsel, i, thread_index), strerror(err));
1269 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
1272 assert(FD(evsel, i, thread_index) >= 0);
1273 fcntl(FD(evsel, i, thread_index), F_SETFL, O_NONBLOCK);
1276 * First counter acts as the group leader:
1278 if (group && group_fd == -1)
1279 group_fd = FD(evsel, i, thread_index);
1281 event_array[nr_poll].fd = FD(evsel, i, thread_index);
1282 event_array[nr_poll].events = POLLIN;
1285 mm = xyarray__entry(mmap_array, i, thread_index);
1287 mm->mask = mmap_pages*page_size - 1;
1288 mm->base = mmap(NULL, (mmap_pages+1)*page_size,
1289 PROT_READ, MAP_SHARED, FD(evsel, i, thread_index), 0);
1290 if (mm->base == MAP_FAILED)
1291 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
1295 static int __cmd_top(void)
1298 struct perf_evsel *counter;
1301 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1302 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1304 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1305 if (session == NULL)
1308 if (target_tid != -1)
1309 event__synthesize_thread_map(threads, event__process, session);
1311 event__synthesize_threads(event__process, session);
1313 for (i = 0; i < cpus->nr; i++) {
1315 list_for_each_entry(counter, &evsel_list, node)
1316 start_counter(i, counter);
1319 /* Wait for a minimal set of events before starting the snapshot */
1320 poll(&event_array[0], nr_poll, 100);
1322 perf_session__mmap_read(session);
1324 if (pthread_create(&thread, NULL, display_thread, session)) {
1325 printf("Could not create display thread.\n");
1329 if (realtime_prio) {
1330 struct sched_param param;
1332 param.sched_priority = realtime_prio;
1333 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1334 printf("Could not set realtime priority.\n");
1342 perf_session__mmap_read(session);
1344 if (hits == samples)
1345 ret = poll(event_array, nr_poll, 100);
1351 static const char * const top_usage[] = {
1352 "perf top [<options>]",
1356 static const struct option options[] = {
1357 OPT_CALLBACK('e', "event", NULL, "event",
1358 "event selector. use 'perf list' to list available events",
1360 OPT_INTEGER('c', "count", &default_interval,
1361 "event period to sample"),
1362 OPT_INTEGER('p', "pid", &target_pid,
1363 "profile events on existing process id"),
1364 OPT_INTEGER('t', "tid", &target_tid,
1365 "profile events on existing thread id"),
1366 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1367 "system-wide collection from all CPUs"),
1368 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1369 "list of cpus to monitor"),
1370 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1371 "file", "vmlinux pathname"),
1372 OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
1373 "hide kernel symbols"),
1374 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1375 OPT_INTEGER('r', "realtime", &realtime_prio,
1376 "collect data with this RT SCHED_FIFO priority"),
1377 OPT_INTEGER('d', "delay", &delay_secs,
1378 "number of seconds to delay between refreshes"),
1379 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1380 "dump the symbol table used for profiling"),
1381 OPT_INTEGER('f', "count-filter", &count_filter,
1382 "only display functions with more events than this"),
1383 OPT_BOOLEAN('g', "group", &group,
1384 "put the counters into a counter group"),
1385 OPT_BOOLEAN('i', "inherit", &inherit,
1386 "child tasks inherit counters"),
1387 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1388 "symbol to annotate"),
1389 OPT_BOOLEAN('z', "zero", &zero,
1390 "zero history across updates"),
1391 OPT_INTEGER('F', "freq", &freq,
1392 "profile at this frequency"),
1393 OPT_INTEGER('E', "entries", &print_entries,
1394 "display this many functions"),
1395 OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
1396 "hide user symbols"),
1397 OPT_INCR('v', "verbose", &verbose,
1398 "be more verbose (show counter open errors, etc)"),
1402 int cmd_top(int argc, const char **argv, const char *prefix __used)
1404 struct perf_evsel *pos;
1405 int status = -ENOMEM;
1407 page_size = sysconf(_SC_PAGE_SIZE);
1409 argc = parse_options(argc, argv, options, top_usage, 0);
1411 usage_with_options(top_usage, options);
1413 if (target_pid != -1)
1414 target_tid = target_pid;
1416 threads = thread_map__new(target_pid, target_tid);
1417 if (threads == NULL) {
1418 pr_err("Problems finding threads of monitor\n");
1419 usage_with_options(top_usage, options);
1422 event_array = malloc((sizeof(struct pollfd) *
1423 MAX_NR_CPUS * MAX_COUNTERS * threads->nr));
1427 /* CPU and PID are mutually exclusive */
1428 if (target_tid > 0 && cpu_list) {
1429 printf("WARNING: PID switch overriding CPU\n");
1434 if (!nr_counters && perf_evsel_list__create_default() < 0) {
1435 pr_err("Not enough memory for event selector list\n");
1443 * User specified count overrides default frequency.
1445 if (default_interval)
1448 default_interval = freq;
1450 fprintf(stderr, "frequency and count are zero, aborting\n");
1454 if (target_tid != -1)
1455 cpus = cpu_map__dummy_new();
1457 cpus = cpu_map__new(cpu_list);
1460 usage_with_options(top_usage, options);
1462 list_for_each_entry(pos, &evsel_list, node) {
1463 if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, threads->nr) < 0 ||
1464 perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
1467 * Fill in the ones not specifically initialized via -c:
1469 if (pos->attr.sample_period)
1472 pos->attr.sample_period = default_interval;
1475 sym_evsel = list_entry(evsel_list.next, struct perf_evsel, node);
1477 symbol_conf.priv_size = (sizeof(struct sym_entry) +
1478 (nr_counters + 1) * sizeof(unsigned long));
1480 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1481 if (symbol__init() < 0)
1484 get_term_dimensions(&winsize);
1485 if (print_entries == 0) {
1486 update_print_entries(&winsize);
1487 signal(SIGWINCH, sig_winch_handler);
1490 status = __cmd_top();
1492 list_for_each_entry(pos, &evsel_list, node)
1493 perf_evsel__free_mmap(pos);
1494 perf_evsel_list__delete();