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1/*
2 * builtin-top.c
3 *
4 * Builtin top command: Display a continuously updated profile of
5 * any workload, CPU or specific PID.
6 *
7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
8 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
9 *
10 * Improvements and fixes by:
11 *
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>
17 *
18 * Released under the GPL v2. (and only v2, not any later version)
19 */
20#include "builtin.h"
21
22#include "perf.h"
23
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/event.h"
31#include "util/machine.h"
32#include "util/session.h"
33#include "util/symbol.h"
34#include "util/thread.h"
35#include "util/thread_map.h"
36#include "util/top.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/term.h"
44#include "util/intlist.h"
45#include "util/parse-branch-options.h"
46#include "arch/common.h"
47
48#include "util/debug.h"
49
50#include <assert.h>
51#include <elf.h>
52#include <fcntl.h>
53
54#include <stdio.h>
55#include <termios.h>
56#include <unistd.h>
57#include <inttypes.h>
58
59#include <errno.h>
60#include <time.h>
61#include <sched.h>
62#include <signal.h>
63
64#include <sys/syscall.h>
65#include <sys/ioctl.h>
66#include <poll.h>
67#include <sys/prctl.h>
68#include <sys/wait.h>
69#include <sys/uio.h>
70#include <sys/utsname.h>
71#include <sys/mman.h>
72
73#include <linux/stringify.h>
74#include <linux/time64.h>
75#include <linux/types.h>
76
77#include "sane_ctype.h"
78
79static volatile int done;
80static volatile int resize;
81
82#define HEADER_LINE_NR 5
83
84static void perf_top__update_print_entries(struct perf_top *top)
85{
86 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
87}
88
89static void winch_sig(int sig __maybe_unused)
90{
91 resize = 1;
92}
93
94static void perf_top__resize(struct perf_top *top)
95{
96 get_term_dimensions(&top->winsize);
97 perf_top__update_print_entries(top);
98}
99
100static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
101{
102 struct perf_evsel *evsel = hists_to_evsel(he->hists);
103 struct symbol *sym;
104 struct annotation *notes;
105 struct map *map;
106 int err = -1;
107
108 if (!he || !he->ms.sym)
109 return -1;
110
111 sym = he->ms.sym;
112 map = he->ms.map;
113
114 /*
115 * We can't annotate with just /proc/kallsyms
116 */
117 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
118 !dso__is_kcore(map->dso)) {
119 pr_err("Can't annotate %s: No vmlinux file was found in the "
120 "path\n", sym->name);
121 sleep(1);
122 return -1;
123 }
124
125 notes = symbol__annotation(sym);
126 if (notes->src != NULL) {
127 pthread_mutex_lock(¬es->lock);
128 goto out_assign;
129 }
130
131 pthread_mutex_lock(¬es->lock);
132
133 if (symbol__alloc_hist(sym) < 0) {
134 pthread_mutex_unlock(¬es->lock);
135 pr_err("Not enough memory for annotating '%s' symbol!\n",
136 sym->name);
137 sleep(1);
138 return err;
139 }
140
141 err = symbol__annotate(sym, map, evsel, 0, NULL);
142 if (err == 0) {
143out_assign:
144 top->sym_filter_entry = he;
145 } else {
146 char msg[BUFSIZ];
147 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
148 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
149 }
150
151 pthread_mutex_unlock(¬es->lock);
152 return err;
153}
154
155static void __zero_source_counters(struct hist_entry *he)
156{
157 struct symbol *sym = he->ms.sym;
158 symbol__annotate_zero_histograms(sym);
159}
160
161static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
162{
163 struct utsname uts;
164 int err = uname(&uts);
165
166 ui__warning("Out of bounds address found:\n\n"
167 "Addr: %" PRIx64 "\n"
168 "DSO: %s %c\n"
169 "Map: %" PRIx64 "-%" PRIx64 "\n"
170 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
171 "Arch: %s\n"
172 "Kernel: %s\n"
173 "Tools: %s\n\n"
174 "Not all samples will be on the annotation output.\n\n"
175 "Please report to linux-kernel@vger.kernel.org\n",
176 ip, map->dso->long_name, dso__symtab_origin(map->dso),
177 map->start, map->end, sym->start, sym->end,
178 sym->binding == STB_GLOBAL ? 'g' :
179 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
180 err ? "[unknown]" : uts.machine,
181 err ? "[unknown]" : uts.release, perf_version_string);
182 if (use_browser <= 0)
183 sleep(5);
184
185 map->erange_warned = true;
186}
187
188static void perf_top__record_precise_ip(struct perf_top *top,
189 struct hist_entry *he,
190 struct perf_sample *sample,
191 int counter, u64 ip)
192{
193 struct annotation *notes;
194 struct symbol *sym = he->ms.sym;
195 int err = 0;
196
197 if (sym == NULL || (use_browser == 0 &&
198 (top->sym_filter_entry == NULL ||
199 top->sym_filter_entry->ms.sym != sym)))
200 return;
201
202 notes = symbol__annotation(sym);
203
204 if (pthread_mutex_trylock(¬es->lock))
205 return;
206
207 err = hist_entry__inc_addr_samples(he, sample, counter, ip);
208
209 pthread_mutex_unlock(¬es->lock);
210
211 if (unlikely(err)) {
212 /*
213 * This function is now called with he->hists->lock held.
214 * Release it before going to sleep.
215 */
216 pthread_mutex_unlock(&he->hists->lock);
217
218 if (err == -ERANGE && !he->ms.map->erange_warned)
219 ui__warn_map_erange(he->ms.map, sym, ip);
220 else if (err == -ENOMEM) {
221 pr_err("Not enough memory for annotating '%s' symbol!\n",
222 sym->name);
223 sleep(1);
224 }
225
226 pthread_mutex_lock(&he->hists->lock);
227 }
228}
229
230static void perf_top__show_details(struct perf_top *top)
231{
232 struct hist_entry *he = top->sym_filter_entry;
233 struct perf_evsel *evsel = hists_to_evsel(he->hists);
234 struct annotation *notes;
235 struct symbol *symbol;
236 int more;
237
238 if (!he)
239 return;
240
241 symbol = he->ms.sym;
242 notes = symbol__annotation(symbol);
243
244 pthread_mutex_lock(¬es->lock);
245
246 symbol__calc_percent(symbol, evsel);
247
248 if (notes->src == NULL)
249 goto out_unlock;
250
251 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
252 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
253
254 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
255 0, top->sym_pcnt_filter, top->print_entries, 4);
256
257 if (top->evlist->enabled) {
258 if (top->zero)
259 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
260 else
261 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
262 }
263 if (more != 0)
264 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
265out_unlock:
266 pthread_mutex_unlock(¬es->lock);
267}
268
269static void perf_top__print_sym_table(struct perf_top *top)
270{
271 char bf[160];
272 int printed = 0;
273 const int win_width = top->winsize.ws_col - 1;
274 struct perf_evsel *evsel = top->sym_evsel;
275 struct hists *hists = evsel__hists(evsel);
276
277 puts(CONSOLE_CLEAR);
278
279 perf_top__header_snprintf(top, bf, sizeof(bf));
280 printf("%s\n", bf);
281
282 perf_top__reset_sample_counters(top);
283
284 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
285
286 if (!top->record_opts.overwrite &&
287 (hists->stats.nr_lost_warned !=
288 hists->stats.nr_events[PERF_RECORD_LOST])) {
289 hists->stats.nr_lost_warned =
290 hists->stats.nr_events[PERF_RECORD_LOST];
291 color_fprintf(stdout, PERF_COLOR_RED,
292 "WARNING: LOST %d chunks, Check IO/CPU overload",
293 hists->stats.nr_lost_warned);
294 ++printed;
295 }
296
297 if (top->sym_filter_entry) {
298 perf_top__show_details(top);
299 return;
300 }
301
302 if (top->evlist->enabled) {
303 if (top->zero) {
304 hists__delete_entries(hists);
305 } else {
306 hists__decay_entries(hists, top->hide_user_symbols,
307 top->hide_kernel_symbols);
308 }
309 }
310
311 hists__collapse_resort(hists, NULL);
312 perf_evsel__output_resort(evsel, NULL);
313
314 hists__output_recalc_col_len(hists, top->print_entries - printed);
315 putchar('\n');
316 hists__fprintf(hists, false, top->print_entries - printed, win_width,
317 top->min_percent, stdout, symbol_conf.use_callchain);
318}
319
320static void prompt_integer(int *target, const char *msg)
321{
322 char *buf = malloc(0), *p;
323 size_t dummy = 0;
324 int tmp;
325
326 fprintf(stdout, "\n%s: ", msg);
327 if (getline(&buf, &dummy, stdin) < 0)
328 return;
329
330 p = strchr(buf, '\n');
331 if (p)
332 *p = 0;
333
334 p = buf;
335 while(*p) {
336 if (!isdigit(*p))
337 goto out_free;
338 p++;
339 }
340 tmp = strtoul(buf, NULL, 10);
341 *target = tmp;
342out_free:
343 free(buf);
344}
345
346static void prompt_percent(int *target, const char *msg)
347{
348 int tmp = 0;
349
350 prompt_integer(&tmp, msg);
351 if (tmp >= 0 && tmp <= 100)
352 *target = tmp;
353}
354
355static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
356{
357 char *buf = malloc(0), *p;
358 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
359 struct hists *hists = evsel__hists(top->sym_evsel);
360 struct rb_node *next;
361 size_t dummy = 0;
362
363 /* zero counters of active symbol */
364 if (syme) {
365 __zero_source_counters(syme);
366 top->sym_filter_entry = NULL;
367 }
368
369 fprintf(stdout, "\n%s: ", msg);
370 if (getline(&buf, &dummy, stdin) < 0)
371 goto out_free;
372
373 p = strchr(buf, '\n');
374 if (p)
375 *p = 0;
376
377 next = rb_first(&hists->entries);
378 while (next) {
379 n = rb_entry(next, struct hist_entry, rb_node);
380 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
381 found = n;
382 break;
383 }
384 next = rb_next(&n->rb_node);
385 }
386
387 if (!found) {
388 fprintf(stderr, "Sorry, %s is not active.\n", buf);
389 sleep(1);
390 } else
391 perf_top__parse_source(top, found);
392
393out_free:
394 free(buf);
395}
396
397static void perf_top__print_mapped_keys(struct perf_top *top)
398{
399 char *name = NULL;
400
401 if (top->sym_filter_entry) {
402 struct symbol *sym = top->sym_filter_entry->ms.sym;
403 name = sym->name;
404 }
405
406 fprintf(stdout, "\nMapped keys:\n");
407 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
408 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
409
410 if (top->evlist->nr_entries > 1)
411 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
412
413 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
414
415 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
416 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
417 fprintf(stdout, "\t[S] stop annotation.\n");
418
419 fprintf(stdout,
420 "\t[K] hide kernel symbols. \t(%s)\n",
421 top->hide_kernel_symbols ? "yes" : "no");
422 fprintf(stdout,
423 "\t[U] hide user symbols. \t(%s)\n",
424 top->hide_user_symbols ? "yes" : "no");
425 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
426 fprintf(stdout, "\t[qQ] quit.\n");
427}
428
429static int perf_top__key_mapped(struct perf_top *top, int c)
430{
431 switch (c) {
432 case 'd':
433 case 'e':
434 case 'f':
435 case 'z':
436 case 'q':
437 case 'Q':
438 case 'K':
439 case 'U':
440 case 'F':
441 case 's':
442 case 'S':
443 return 1;
444 case 'E':
445 return top->evlist->nr_entries > 1 ? 1 : 0;
446 default:
447 break;
448 }
449
450 return 0;
451}
452
453static bool perf_top__handle_keypress(struct perf_top *top, int c)
454{
455 bool ret = true;
456
457 if (!perf_top__key_mapped(top, c)) {
458 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
459 struct termios save;
460
461 perf_top__print_mapped_keys(top);
462 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
463 fflush(stdout);
464
465 set_term_quiet_input(&save);
466
467 poll(&stdin_poll, 1, -1);
468 c = getc(stdin);
469
470 tcsetattr(0, TCSAFLUSH, &save);
471 if (!perf_top__key_mapped(top, c))
472 return ret;
473 }
474
475 switch (c) {
476 case 'd':
477 prompt_integer(&top->delay_secs, "Enter display delay");
478 if (top->delay_secs < 1)
479 top->delay_secs = 1;
480 break;
481 case 'e':
482 prompt_integer(&top->print_entries, "Enter display entries (lines)");
483 if (top->print_entries == 0) {
484 perf_top__resize(top);
485 signal(SIGWINCH, winch_sig);
486 } else {
487 signal(SIGWINCH, SIG_DFL);
488 }
489 break;
490 case 'E':
491 if (top->evlist->nr_entries > 1) {
492 /* Select 0 as the default event: */
493 int counter = 0;
494
495 fprintf(stderr, "\nAvailable events:");
496
497 evlist__for_each_entry(top->evlist, top->sym_evsel)
498 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
499
500 prompt_integer(&counter, "Enter details event counter");
501
502 if (counter >= top->evlist->nr_entries) {
503 top->sym_evsel = perf_evlist__first(top->evlist);
504 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
505 sleep(1);
506 break;
507 }
508 evlist__for_each_entry(top->evlist, top->sym_evsel)
509 if (top->sym_evsel->idx == counter)
510 break;
511 } else
512 top->sym_evsel = perf_evlist__first(top->evlist);
513 break;
514 case 'f':
515 prompt_integer(&top->count_filter, "Enter display event count filter");
516 break;
517 case 'F':
518 prompt_percent(&top->sym_pcnt_filter,
519 "Enter details display event filter (percent)");
520 break;
521 case 'K':
522 top->hide_kernel_symbols = !top->hide_kernel_symbols;
523 break;
524 case 'q':
525 case 'Q':
526 printf("exiting.\n");
527 if (top->dump_symtab)
528 perf_session__fprintf_dsos(top->session, stderr);
529 ret = false;
530 break;
531 case 's':
532 perf_top__prompt_symbol(top, "Enter details symbol");
533 break;
534 case 'S':
535 if (!top->sym_filter_entry)
536 break;
537 else {
538 struct hist_entry *syme = top->sym_filter_entry;
539
540 top->sym_filter_entry = NULL;
541 __zero_source_counters(syme);
542 }
543 break;
544 case 'U':
545 top->hide_user_symbols = !top->hide_user_symbols;
546 break;
547 case 'z':
548 top->zero = !top->zero;
549 break;
550 default:
551 break;
552 }
553
554 return ret;
555}
556
557static void perf_top__sort_new_samples(void *arg)
558{
559 struct perf_top *t = arg;
560 struct perf_evsel *evsel = t->sym_evsel;
561 struct hists *hists;
562
563 perf_top__reset_sample_counters(t);
564
565 if (t->evlist->selected != NULL)
566 t->sym_evsel = t->evlist->selected;
567
568 hists = evsel__hists(evsel);
569
570 if (t->evlist->enabled) {
571 if (t->zero) {
572 hists__delete_entries(hists);
573 } else {
574 hists__decay_entries(hists, t->hide_user_symbols,
575 t->hide_kernel_symbols);
576 }
577 }
578
579 hists__collapse_resort(hists, NULL);
580 perf_evsel__output_resort(evsel, NULL);
581}
582
583static void *display_thread_tui(void *arg)
584{
585 struct perf_evsel *pos;
586 struct perf_top *top = arg;
587 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
588 struct hist_browser_timer hbt = {
589 .timer = perf_top__sort_new_samples,
590 .arg = top,
591 .refresh = top->delay_secs,
592 };
593
594 /* In order to read symbols from other namespaces perf to needs to call
595 * setns(2). This isn't permitted if the struct_fs has multiple users.
596 * unshare(2) the fs so that we may continue to setns into namespaces
597 * that we're observing.
598 */
599 unshare(CLONE_FS);
600
601 perf_top__sort_new_samples(top);
602
603 /*
604 * Initialize the uid_filter_str, in the future the TUI will allow
605 * Zooming in/out UIDs. For now juse use whatever the user passed
606 * via --uid.
607 */
608 evlist__for_each_entry(top->evlist, pos) {
609 struct hists *hists = evsel__hists(pos);
610 hists->uid_filter_str = top->record_opts.target.uid_str;
611 }
612
613 perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
614 top->min_percent,
615 &top->session->header.env,
616 !top->record_opts.overwrite);
617
618 done = 1;
619 return NULL;
620}
621
622static void display_sig(int sig __maybe_unused)
623{
624 done = 1;
625}
626
627static void display_setup_sig(void)
628{
629 signal(SIGSEGV, sighandler_dump_stack);
630 signal(SIGFPE, sighandler_dump_stack);
631 signal(SIGINT, display_sig);
632 signal(SIGQUIT, display_sig);
633 signal(SIGTERM, display_sig);
634}
635
636static void *display_thread(void *arg)
637{
638 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
639 struct termios save;
640 struct perf_top *top = arg;
641 int delay_msecs, c;
642
643 /* In order to read symbols from other namespaces perf to needs to call
644 * setns(2). This isn't permitted if the struct_fs has multiple users.
645 * unshare(2) the fs so that we may continue to setns into namespaces
646 * that we're observing.
647 */
648 unshare(CLONE_FS);
649
650 display_setup_sig();
651 pthread__unblock_sigwinch();
652repeat:
653 delay_msecs = top->delay_secs * MSEC_PER_SEC;
654 set_term_quiet_input(&save);
655 /* trash return*/
656 getc(stdin);
657
658 while (!done) {
659 perf_top__print_sym_table(top);
660 /*
661 * Either timeout expired or we got an EINTR due to SIGWINCH,
662 * refresh screen in both cases.
663 */
664 switch (poll(&stdin_poll, 1, delay_msecs)) {
665 case 0:
666 continue;
667 case -1:
668 if (errno == EINTR)
669 continue;
670 __fallthrough;
671 default:
672 c = getc(stdin);
673 tcsetattr(0, TCSAFLUSH, &save);
674
675 if (perf_top__handle_keypress(top, c))
676 goto repeat;
677 done = 1;
678 }
679 }
680
681 tcsetattr(0, TCSAFLUSH, &save);
682 return NULL;
683}
684
685static int hist_iter__top_callback(struct hist_entry_iter *iter,
686 struct addr_location *al, bool single,
687 void *arg)
688{
689 struct perf_top *top = arg;
690 struct hist_entry *he = iter->he;
691 struct perf_evsel *evsel = iter->evsel;
692
693 if (perf_hpp_list.sym && single)
694 perf_top__record_precise_ip(top, he, iter->sample, evsel->idx, al->addr);
695
696 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
697 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
698 return 0;
699}
700
701static void perf_event__process_sample(struct perf_tool *tool,
702 const union perf_event *event,
703 struct perf_evsel *evsel,
704 struct perf_sample *sample,
705 struct machine *machine)
706{
707 struct perf_top *top = container_of(tool, struct perf_top, tool);
708 struct addr_location al;
709 int err;
710
711 if (!machine && perf_guest) {
712 static struct intlist *seen;
713
714 if (!seen)
715 seen = intlist__new(NULL);
716
717 if (!intlist__has_entry(seen, sample->pid)) {
718 pr_err("Can't find guest [%d]'s kernel information\n",
719 sample->pid);
720 intlist__add(seen, sample->pid);
721 }
722 return;
723 }
724
725 if (!machine) {
726 pr_err("%u unprocessable samples recorded.\r",
727 top->session->evlist->stats.nr_unprocessable_samples++);
728 return;
729 }
730
731 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
732 top->exact_samples++;
733
734 if (machine__resolve(machine, &al, sample) < 0)
735 return;
736
737 if (!machine->kptr_restrict_warned &&
738 symbol_conf.kptr_restrict &&
739 al.cpumode == PERF_RECORD_MISC_KERNEL) {
740 if (!perf_evlist__exclude_kernel(top->session->evlist)) {
741 ui__warning(
742"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
743"Check /proc/sys/kernel/kptr_restrict.\n\n"
744"Kernel%s samples will not be resolved.\n",
745 al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
746 " modules" : "");
747 if (use_browser <= 0)
748 sleep(5);
749 }
750 machine->kptr_restrict_warned = true;
751 }
752
753 if (al.sym == NULL) {
754 const char *msg = "Kernel samples will not be resolved.\n";
755 /*
756 * As we do lazy loading of symtabs we only will know if the
757 * specified vmlinux file is invalid when we actually have a
758 * hit in kernel space and then try to load it. So if we get
759 * here and there are _no_ symbols in the DSO backing the
760 * kernel map, bail out.
761 *
762 * We may never get here, for instance, if we use -K/
763 * --hide-kernel-symbols, even if the user specifies an
764 * invalid --vmlinux ;-)
765 */
766 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
767 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
768 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
769 if (symbol_conf.vmlinux_name) {
770 char serr[256];
771 dso__strerror_load(al.map->dso, serr, sizeof(serr));
772 ui__warning("The %s file can't be used: %s\n%s",
773 symbol_conf.vmlinux_name, serr, msg);
774 } else {
775 ui__warning("A vmlinux file was not found.\n%s",
776 msg);
777 }
778
779 if (use_browser <= 0)
780 sleep(5);
781 top->vmlinux_warned = true;
782 }
783 }
784
785 if (al.sym == NULL || !al.sym->idle) {
786 struct hists *hists = evsel__hists(evsel);
787 struct hist_entry_iter iter = {
788 .evsel = evsel,
789 .sample = sample,
790 .add_entry_cb = hist_iter__top_callback,
791 };
792
793 if (symbol_conf.cumulate_callchain)
794 iter.ops = &hist_iter_cumulative;
795 else
796 iter.ops = &hist_iter_normal;
797
798 pthread_mutex_lock(&hists->lock);
799
800 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
801 if (err < 0)
802 pr_err("Problem incrementing symbol period, skipping event\n");
803
804 pthread_mutex_unlock(&hists->lock);
805 }
806
807 addr_location__put(&al);
808}
809
810static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
811{
812 struct record_opts *opts = &top->record_opts;
813 struct perf_evlist *evlist = top->evlist;
814 struct perf_sample sample;
815 struct perf_evsel *evsel;
816 struct perf_mmap *md;
817 struct perf_session *session = top->session;
818 union perf_event *event;
819 struct machine *machine;
820 int ret;
821
822 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
823 if (perf_mmap__read_init(md) < 0)
824 return;
825
826 while ((event = perf_mmap__read_event(md)) != NULL) {
827 ret = perf_evlist__parse_sample(evlist, event, &sample);
828 if (ret) {
829 pr_err("Can't parse sample, err = %d\n", ret);
830 goto next_event;
831 }
832
833 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
834 assert(evsel != NULL);
835
836 if (event->header.type == PERF_RECORD_SAMPLE)
837 ++top->samples;
838
839 switch (sample.cpumode) {
840 case PERF_RECORD_MISC_USER:
841 ++top->us_samples;
842 if (top->hide_user_symbols)
843 goto next_event;
844 machine = &session->machines.host;
845 break;
846 case PERF_RECORD_MISC_KERNEL:
847 ++top->kernel_samples;
848 if (top->hide_kernel_symbols)
849 goto next_event;
850 machine = &session->machines.host;
851 break;
852 case PERF_RECORD_MISC_GUEST_KERNEL:
853 ++top->guest_kernel_samples;
854 machine = perf_session__find_machine(session,
855 sample.pid);
856 break;
857 case PERF_RECORD_MISC_GUEST_USER:
858 ++top->guest_us_samples;
859 /*
860 * TODO: we don't process guest user from host side
861 * except simple counting.
862 */
863 goto next_event;
864 default:
865 if (event->header.type == PERF_RECORD_SAMPLE)
866 goto next_event;
867 machine = &session->machines.host;
868 break;
869 }
870
871
872 if (event->header.type == PERF_RECORD_SAMPLE) {
873 perf_event__process_sample(&top->tool, event, evsel,
874 &sample, machine);
875 } else if (event->header.type < PERF_RECORD_MAX) {
876 hists__inc_nr_events(evsel__hists(evsel), event->header.type);
877 machine__process_event(machine, event, &sample);
878 } else
879 ++session->evlist->stats.nr_unknown_events;
880next_event:
881 perf_mmap__consume(md);
882 }
883
884 perf_mmap__read_done(md);
885}
886
887static void perf_top__mmap_read(struct perf_top *top)
888{
889 bool overwrite = top->record_opts.overwrite;
890 struct perf_evlist *evlist = top->evlist;
891 unsigned long long start, end;
892 int i;
893
894 start = rdclock();
895 if (overwrite)
896 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
897
898 for (i = 0; i < top->evlist->nr_mmaps; i++)
899 perf_top__mmap_read_idx(top, i);
900
901 if (overwrite) {
902 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
903 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
904 }
905 end = rdclock();
906
907 if ((end - start) > (unsigned long long)top->delay_secs * NSEC_PER_SEC)
908 ui__warning("Too slow to read ring buffer.\n"
909 "Please try increasing the period (-c) or\n"
910 "decreasing the freq (-F) or\n"
911 "limiting the number of CPUs (-C)\n");
912}
913
914/*
915 * Check per-event overwrite term.
916 * perf top should support consistent term for all events.
917 * - All events don't have per-event term
918 * E.g. "cpu/cpu-cycles/,cpu/instructions/"
919 * Nothing change, return 0.
920 * - All events have same per-event term
921 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
922 * Using the per-event setting to replace the opts->overwrite if
923 * they are different, then return 0.
924 * - Events have different per-event term
925 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
926 * Return -1
927 * - Some of the event set per-event term, but some not.
928 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
929 * Return -1
930 */
931static int perf_top__overwrite_check(struct perf_top *top)
932{
933 struct record_opts *opts = &top->record_opts;
934 struct perf_evlist *evlist = top->evlist;
935 struct perf_evsel_config_term *term;
936 struct list_head *config_terms;
937 struct perf_evsel *evsel;
938 int set, overwrite = -1;
939
940 evlist__for_each_entry(evlist, evsel) {
941 set = -1;
942 config_terms = &evsel->config_terms;
943 list_for_each_entry(term, config_terms, list) {
944 if (term->type == PERF_EVSEL__CONFIG_TERM_OVERWRITE)
945 set = term->val.overwrite ? 1 : 0;
946 }
947
948 /* no term for current and previous event (likely) */
949 if ((overwrite < 0) && (set < 0))
950 continue;
951
952 /* has term for both current and previous event, compare */
953 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
954 return -1;
955
956 /* no term for current event but has term for previous one */
957 if ((overwrite >= 0) && (set < 0))
958 return -1;
959
960 /* has term for current event */
961 if ((overwrite < 0) && (set >= 0)) {
962 /* if it's first event, set overwrite */
963 if (evsel == perf_evlist__first(evlist))
964 overwrite = set;
965 else
966 return -1;
967 }
968 }
969
970 if ((overwrite >= 0) && (opts->overwrite != overwrite))
971 opts->overwrite = overwrite;
972
973 return 0;
974}
975
976static int perf_top_overwrite_fallback(struct perf_top *top,
977 struct perf_evsel *evsel)
978{
979 struct record_opts *opts = &top->record_opts;
980 struct perf_evlist *evlist = top->evlist;
981 struct perf_evsel *counter;
982
983 if (!opts->overwrite)
984 return 0;
985
986 /* only fall back when first event fails */
987 if (evsel != perf_evlist__first(evlist))
988 return 0;
989
990 evlist__for_each_entry(evlist, counter)
991 counter->attr.write_backward = false;
992 opts->overwrite = false;
993 pr_debug2("fall back to non-overwrite mode\n");
994 return 1;
995}
996
997static int perf_top__start_counters(struct perf_top *top)
998{
999 char msg[BUFSIZ];
1000 struct perf_evsel *counter;
1001 struct perf_evlist *evlist = top->evlist;
1002 struct record_opts *opts = &top->record_opts;
1003
1004 if (perf_top__overwrite_check(top)) {
1005 ui__error("perf top only support consistent per-event "
1006 "overwrite setting for all events\n");
1007 goto out_err;
1008 }
1009
1010 perf_evlist__config(evlist, opts, &callchain_param);
1011
1012 evlist__for_each_entry(evlist, counter) {
1013try_again:
1014 if (perf_evsel__open(counter, top->evlist->cpus,
1015 top->evlist->threads) < 0) {
1016
1017 /*
1018 * Specially handle overwrite fall back.
1019 * Because perf top is the only tool which has
1020 * overwrite mode by default, support
1021 * both overwrite and non-overwrite mode, and
1022 * require consistent mode for all events.
1023 *
1024 * May move it to generic code with more tools
1025 * have similar attribute.
1026 */
1027 if (perf_missing_features.write_backward &&
1028 perf_top_overwrite_fallback(top, counter))
1029 goto try_again;
1030
1031 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
1032 if (verbose > 0)
1033 ui__warning("%s\n", msg);
1034 goto try_again;
1035 }
1036
1037 perf_evsel__open_strerror(counter, &opts->target,
1038 errno, msg, sizeof(msg));
1039 ui__error("%s\n", msg);
1040 goto out_err;
1041 }
1042 }
1043
1044 if (perf_evlist__mmap(evlist, opts->mmap_pages) < 0) {
1045 ui__error("Failed to mmap with %d (%s)\n",
1046 errno, str_error_r(errno, msg, sizeof(msg)));
1047 goto out_err;
1048 }
1049
1050 return 0;
1051
1052out_err:
1053 return -1;
1054}
1055
1056static int callchain_param__setup_sample_type(struct callchain_param *callchain)
1057{
1058 if (!perf_hpp_list.sym) {
1059 if (callchain->enabled) {
1060 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
1061 return -EINVAL;
1062 }
1063 } else if (callchain->mode != CHAIN_NONE) {
1064 if (callchain_register_param(callchain) < 0) {
1065 ui__error("Can't register callchain params.\n");
1066 return -EINVAL;
1067 }
1068 }
1069
1070 return 0;
1071}
1072
1073static int __cmd_top(struct perf_top *top)
1074{
1075 char msg[512];
1076 struct perf_evsel *pos;
1077 struct perf_evsel_config_term *err_term;
1078 struct perf_evlist *evlist = top->evlist;
1079 struct record_opts *opts = &top->record_opts;
1080 pthread_t thread;
1081 int ret;
1082
1083 top->session = perf_session__new(NULL, false, NULL);
1084 if (top->session == NULL)
1085 return -1;
1086
1087 if (!objdump_path) {
1088 ret = perf_env__lookup_objdump(&top->session->header.env);
1089 if (ret)
1090 goto out_delete;
1091 }
1092
1093 ret = callchain_param__setup_sample_type(&callchain_param);
1094 if (ret)
1095 goto out_delete;
1096
1097 if (perf_session__register_idle_thread(top->session) < 0)
1098 goto out_delete;
1099
1100 if (top->nr_threads_synthesize > 1)
1101 perf_set_multithreaded();
1102
1103 machine__synthesize_threads(&top->session->machines.host, &opts->target,
1104 top->evlist->threads, false,
1105 opts->proc_map_timeout,
1106 top->nr_threads_synthesize);
1107
1108 if (top->nr_threads_synthesize > 1)
1109 perf_set_singlethreaded();
1110
1111 if (perf_hpp_list.socket) {
1112 ret = perf_env__read_cpu_topology_map(&perf_env);
1113 if (ret < 0)
1114 goto out_err_cpu_topo;
1115 }
1116
1117 ret = perf_top__start_counters(top);
1118 if (ret)
1119 goto out_delete;
1120
1121 ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term);
1122 if (ret) {
1123 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
1124 err_term->val.drv_cfg, perf_evsel__name(pos), errno,
1125 str_error_r(errno, msg, sizeof(msg)));
1126 goto out_delete;
1127 }
1128
1129 top->session->evlist = top->evlist;
1130 perf_session__set_id_hdr_size(top->session);
1131
1132 /*
1133 * When perf is starting the traced process, all the events (apart from
1134 * group members) have enable_on_exec=1 set, so don't spoil it by
1135 * prematurely enabling them.
1136 *
1137 * XXX 'top' still doesn't start workloads like record, trace, but should,
1138 * so leave the check here.
1139 */
1140 if (!target__none(&opts->target))
1141 perf_evlist__enable(top->evlist);
1142
1143 /* Wait for a minimal set of events before starting the snapshot */
1144 perf_evlist__poll(top->evlist, 100);
1145
1146 perf_top__mmap_read(top);
1147
1148 ret = -1;
1149 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1150 display_thread), top)) {
1151 ui__error("Could not create display thread.\n");
1152 goto out_delete;
1153 }
1154
1155 if (top->realtime_prio) {
1156 struct sched_param param;
1157
1158 param.sched_priority = top->realtime_prio;
1159 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1160 ui__error("Could not set realtime priority.\n");
1161 goto out_join;
1162 }
1163 }
1164
1165 while (!done) {
1166 u64 hits = top->samples;
1167
1168 perf_top__mmap_read(top);
1169
1170 if (opts->overwrite || (hits == top->samples))
1171 ret = perf_evlist__poll(top->evlist, 100);
1172
1173 if (resize) {
1174 perf_top__resize(top);
1175 resize = 0;
1176 }
1177 }
1178
1179 ret = 0;
1180out_join:
1181 pthread_join(thread, NULL);
1182out_delete:
1183 perf_session__delete(top->session);
1184 top->session = NULL;
1185
1186 return ret;
1187
1188out_err_cpu_topo: {
1189 char errbuf[BUFSIZ];
1190 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1191
1192 ui__error("Could not read the CPU topology map: %s\n", err);
1193 goto out_delete;
1194}
1195}
1196
1197static int
1198callchain_opt(const struct option *opt, const char *arg, int unset)
1199{
1200 symbol_conf.use_callchain = true;
1201 return record_callchain_opt(opt, arg, unset);
1202}
1203
1204static int
1205parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1206{
1207 struct callchain_param *callchain = opt->value;
1208
1209 callchain->enabled = !unset;
1210 callchain->record_mode = CALLCHAIN_FP;
1211
1212 /*
1213 * --no-call-graph
1214 */
1215 if (unset) {
1216 symbol_conf.use_callchain = false;
1217 callchain->record_mode = CALLCHAIN_NONE;
1218 return 0;
1219 }
1220
1221 return parse_callchain_top_opt(arg);
1222}
1223
1224static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1225{
1226 if (!strcmp(var, "top.call-graph")) {
1227 var = "call-graph.record-mode";
1228 return perf_default_config(var, value, cb);
1229 }
1230 if (!strcmp(var, "top.children")) {
1231 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1232 return 0;
1233 }
1234
1235 return 0;
1236}
1237
1238static int
1239parse_percent_limit(const struct option *opt, const char *arg,
1240 int unset __maybe_unused)
1241{
1242 struct perf_top *top = opt->value;
1243
1244 top->min_percent = strtof(arg, NULL);
1245 return 0;
1246}
1247
1248const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1249 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1250
1251int cmd_top(int argc, const char **argv)
1252{
1253 char errbuf[BUFSIZ];
1254 struct perf_top top = {
1255 .count_filter = 5,
1256 .delay_secs = 2,
1257 .record_opts = {
1258 .mmap_pages = UINT_MAX,
1259 .user_freq = UINT_MAX,
1260 .user_interval = ULLONG_MAX,
1261 .freq = 4000, /* 4 KHz */
1262 .target = {
1263 .uses_mmap = true,
1264 },
1265 .proc_map_timeout = 500,
1266 .overwrite = 1,
1267 },
1268 .max_stack = sysctl_perf_event_max_stack,
1269 .sym_pcnt_filter = 5,
1270 .nr_threads_synthesize = UINT_MAX,
1271 };
1272 struct record_opts *opts = &top.record_opts;
1273 struct target *target = &opts->target;
1274 const struct option options[] = {
1275 OPT_CALLBACK('e', "event", &top.evlist, "event",
1276 "event selector. use 'perf list' to list available events",
1277 parse_events_option),
1278 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1279 OPT_STRING('p', "pid", &target->pid, "pid",
1280 "profile events on existing process id"),
1281 OPT_STRING('t', "tid", &target->tid, "tid",
1282 "profile events on existing thread id"),
1283 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1284 "system-wide collection from all CPUs"),
1285 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1286 "list of cpus to monitor"),
1287 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1288 "file", "vmlinux pathname"),
1289 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1290 "don't load vmlinux even if found"),
1291 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1292 "hide kernel symbols"),
1293 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1294 "number of mmap data pages",
1295 perf_evlist__parse_mmap_pages),
1296 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1297 "collect data with this RT SCHED_FIFO priority"),
1298 OPT_INTEGER('d', "delay", &top.delay_secs,
1299 "number of seconds to delay between refreshes"),
1300 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1301 "dump the symbol table used for profiling"),
1302 OPT_INTEGER('f', "count-filter", &top.count_filter,
1303 "only display functions with more events than this"),
1304 OPT_BOOLEAN(0, "group", &opts->group,
1305 "put the counters into a counter group"),
1306 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1307 "child tasks do not inherit counters"),
1308 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1309 "symbol to annotate"),
1310 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1311 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
1312 "profile at this frequency",
1313 record__parse_freq),
1314 OPT_INTEGER('E', "entries", &top.print_entries,
1315 "display this many functions"),
1316 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1317 "hide user symbols"),
1318 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1319 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1320 OPT_INCR('v', "verbose", &verbose,
1321 "be more verbose (show counter open errors, etc)"),
1322 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1323 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1324 " Please refer the man page for the complete list."),
1325 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1326 "output field(s): overhead, period, sample plus all of sort keys"),
1327 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1328 "Show a column with the number of samples"),
1329 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1330 NULL, "enables call-graph recording and display",
1331 &callchain_opt),
1332 OPT_CALLBACK(0, "call-graph", &callchain_param,
1333 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1334 top_callchain_help, &parse_callchain_opt),
1335 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1336 "Accumulate callchains of children and show total overhead as well"),
1337 OPT_INTEGER(0, "max-stack", &top.max_stack,
1338 "Set the maximum stack depth when parsing the callchain. "
1339 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1340 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1341 "ignore callees of these functions in call graphs",
1342 report_parse_ignore_callees_opt),
1343 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1344 "Show a column with the sum of periods"),
1345 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1346 "only consider symbols in these dsos"),
1347 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1348 "only consider symbols in these comms"),
1349 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1350 "only consider these symbols"),
1351 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1352 "Interleave source code with assembly code (default)"),
1353 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1354 "Display raw encoding of assembly instructions (default)"),
1355 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1356 "Enable kernel symbol demangling"),
1357 OPT_STRING(0, "objdump", &objdump_path, "path",
1358 "objdump binary to use for disassembly and annotations"),
1359 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1360 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1361 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1362 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1363 "Don't show entries under that percent", parse_percent_limit),
1364 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1365 "How to display percentage of filtered entries", parse_filter_percentage),
1366 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1367 "width[,width...]",
1368 "don't try to adjust column width, use these fixed values"),
1369 OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1370 "per thread proc mmap processing timeout in ms"),
1371 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1372 "branch any", "sample any taken branches",
1373 parse_branch_stack),
1374 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1375 "branch filter mask", "branch stack filter modes",
1376 parse_branch_stack),
1377 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1378 "Show raw trace event output (do not use print fmt or plugins)"),
1379 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1380 "Show entries in a hierarchy"),
1381 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1382 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
1383 "number of thread to run event synthesize"),
1384 OPT_END()
1385 };
1386 const char * const top_usage[] = {
1387 "perf top [<options>]",
1388 NULL
1389 };
1390 int status = hists__init();
1391
1392 if (status < 0)
1393 return status;
1394
1395 top.evlist = perf_evlist__new();
1396 if (top.evlist == NULL)
1397 return -ENOMEM;
1398
1399 status = perf_config(perf_top_config, &top);
1400 if (status)
1401 return status;
1402
1403 argc = parse_options(argc, argv, options, top_usage, 0);
1404 if (argc)
1405 usage_with_options(top_usage, options);
1406
1407 if (!top.evlist->nr_entries &&
1408 perf_evlist__add_default(top.evlist) < 0) {
1409 pr_err("Not enough memory for event selector list\n");
1410 goto out_delete_evlist;
1411 }
1412
1413 if (symbol_conf.report_hierarchy) {
1414 /* disable incompatible options */
1415 symbol_conf.event_group = false;
1416 symbol_conf.cumulate_callchain = false;
1417
1418 if (field_order) {
1419 pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1420 parse_options_usage(top_usage, options, "fields", 0);
1421 parse_options_usage(NULL, options, "hierarchy", 0);
1422 goto out_delete_evlist;
1423 }
1424 }
1425
1426 sort__mode = SORT_MODE__TOP;
1427 /* display thread wants entries to be collapsed in a different tree */
1428 perf_hpp_list.need_collapse = 1;
1429
1430 if (top.use_stdio)
1431 use_browser = 0;
1432 else if (top.use_tui)
1433 use_browser = 1;
1434
1435 setup_browser(false);
1436
1437 if (setup_sorting(top.evlist) < 0) {
1438 if (sort_order)
1439 parse_options_usage(top_usage, options, "s", 1);
1440 if (field_order)
1441 parse_options_usage(sort_order ? NULL : top_usage,
1442 options, "fields", 0);
1443 goto out_delete_evlist;
1444 }
1445
1446 status = target__validate(target);
1447 if (status) {
1448 target__strerror(target, status, errbuf, BUFSIZ);
1449 ui__warning("%s\n", errbuf);
1450 }
1451
1452 status = target__parse_uid(target);
1453 if (status) {
1454 int saved_errno = errno;
1455
1456 target__strerror(target, status, errbuf, BUFSIZ);
1457 ui__error("%s\n", errbuf);
1458
1459 status = -saved_errno;
1460 goto out_delete_evlist;
1461 }
1462
1463 if (target__none(target))
1464 target->system_wide = true;
1465
1466 if (perf_evlist__create_maps(top.evlist, target) < 0) {
1467 ui__error("Couldn't create thread/CPU maps: %s\n",
1468 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1469 goto out_delete_evlist;
1470 }
1471
1472 symbol_conf.nr_events = top.evlist->nr_entries;
1473
1474 if (top.delay_secs < 1)
1475 top.delay_secs = 1;
1476
1477 if (record_opts__config(opts)) {
1478 status = -EINVAL;
1479 goto out_delete_evlist;
1480 }
1481
1482 top.sym_evsel = perf_evlist__first(top.evlist);
1483
1484 if (!callchain_param.enabled) {
1485 symbol_conf.cumulate_callchain = false;
1486 perf_hpp__cancel_cumulate();
1487 }
1488
1489 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1490 callchain_param.order = ORDER_CALLER;
1491
1492 status = symbol__annotation_init();
1493 if (status < 0)
1494 goto out_delete_evlist;
1495
1496 annotation_config__init();
1497
1498 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1499 if (symbol__init(NULL) < 0)
1500 return -1;
1501
1502 sort__setup_elide(stdout);
1503
1504 get_term_dimensions(&top.winsize);
1505 if (top.print_entries == 0) {
1506 perf_top__update_print_entries(&top);
1507 signal(SIGWINCH, winch_sig);
1508 }
1509
1510 status = __cmd_top(&top);
1511
1512out_delete_evlist:
1513 perf_evlist__delete(top.evlist);
1514
1515 return status;
1516}
1/*
2 * builtin-top.c
3 *
4 * Builtin top command: Display a continuously updated profile of
5 * any workload, CPU or specific PID.
6 *
7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
8 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
9 *
10 * Improvements and fixes by:
11 *
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>
17 *
18 * Released under the GPL v2. (and only v2, not any later version)
19 */
20#include "builtin.h"
21
22#include "perf.h"
23
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"
35#include "util/top.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"
46
47#include "util/debug.h"
48
49#include <assert.h>
50#include <elf.h>
51#include <fcntl.h>
52
53#include <stdio.h>
54#include <termios.h>
55#include <unistd.h>
56#include <inttypes.h>
57
58#include <errno.h>
59#include <time.h>
60#include <sched.h>
61
62#include <sys/syscall.h>
63#include <sys/ioctl.h>
64#include <poll.h>
65#include <sys/prctl.h>
66#include <sys/wait.h>
67#include <sys/uio.h>
68#include <sys/utsname.h>
69#include <sys/mman.h>
70
71#include <linux/stringify.h>
72#include <linux/time64.h>
73#include <linux/types.h>
74
75static volatile int done;
76
77#define HEADER_LINE_NR 5
78
79static void perf_top__update_print_entries(struct perf_top *top)
80{
81 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
82}
83
84static void perf_top__sig_winch(int sig __maybe_unused,
85 siginfo_t *info __maybe_unused, void *arg)
86{
87 struct perf_top *top = arg;
88
89 get_term_dimensions(&top->winsize);
90 perf_top__update_print_entries(top);
91}
92
93static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
94{
95 struct symbol *sym;
96 struct annotation *notes;
97 struct map *map;
98 int err = -1;
99
100 if (!he || !he->ms.sym)
101 return -1;
102
103 sym = he->ms.sym;
104 map = he->ms.map;
105
106 /*
107 * We can't annotate with just /proc/kallsyms
108 */
109 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
110 !dso__is_kcore(map->dso)) {
111 pr_err("Can't annotate %s: No vmlinux file was found in the "
112 "path\n", sym->name);
113 sleep(1);
114 return -1;
115 }
116
117 notes = symbol__annotation(sym);
118 if (notes->src != NULL) {
119 pthread_mutex_lock(¬es->lock);
120 goto out_assign;
121 }
122
123 pthread_mutex_lock(¬es->lock);
124
125 if (symbol__alloc_hist(sym) < 0) {
126 pthread_mutex_unlock(¬es->lock);
127 pr_err("Not enough memory for annotating '%s' symbol!\n",
128 sym->name);
129 sleep(1);
130 return err;
131 }
132
133 err = symbol__disassemble(sym, map, NULL, 0);
134 if (err == 0) {
135out_assign:
136 top->sym_filter_entry = he;
137 } else {
138 char msg[BUFSIZ];
139 symbol__strerror_disassemble(sym, map, err, msg, sizeof(msg));
140 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
141 }
142
143 pthread_mutex_unlock(¬es->lock);
144 return err;
145}
146
147static void __zero_source_counters(struct hist_entry *he)
148{
149 struct symbol *sym = he->ms.sym;
150 symbol__annotate_zero_histograms(sym);
151}
152
153static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
154{
155 struct utsname uts;
156 int err = uname(&uts);
157
158 ui__warning("Out of bounds address found:\n\n"
159 "Addr: %" PRIx64 "\n"
160 "DSO: %s %c\n"
161 "Map: %" PRIx64 "-%" PRIx64 "\n"
162 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
163 "Arch: %s\n"
164 "Kernel: %s\n"
165 "Tools: %s\n\n"
166 "Not all samples will be on the annotation output.\n\n"
167 "Please report to linux-kernel@vger.kernel.org\n",
168 ip, map->dso->long_name, dso__symtab_origin(map->dso),
169 map->start, map->end, sym->start, sym->end,
170 sym->binding == STB_GLOBAL ? 'g' :
171 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
172 err ? "[unknown]" : uts.machine,
173 err ? "[unknown]" : uts.release, perf_version_string);
174 if (use_browser <= 0)
175 sleep(5);
176
177 map->erange_warned = true;
178}
179
180static void perf_top__record_precise_ip(struct perf_top *top,
181 struct hist_entry *he,
182 int counter, u64 ip)
183{
184 struct annotation *notes;
185 struct symbol *sym = he->ms.sym;
186 int err = 0;
187
188 if (sym == NULL || (use_browser == 0 &&
189 (top->sym_filter_entry == NULL ||
190 top->sym_filter_entry->ms.sym != sym)))
191 return;
192
193 notes = symbol__annotation(sym);
194
195 if (pthread_mutex_trylock(¬es->lock))
196 return;
197
198 err = hist_entry__inc_addr_samples(he, counter, ip);
199
200 pthread_mutex_unlock(¬es->lock);
201
202 if (unlikely(err)) {
203 /*
204 * This function is now called with he->hists->lock held.
205 * Release it before going to sleep.
206 */
207 pthread_mutex_unlock(&he->hists->lock);
208
209 if (err == -ERANGE && !he->ms.map->erange_warned)
210 ui__warn_map_erange(he->ms.map, sym, ip);
211 else if (err == -ENOMEM) {
212 pr_err("Not enough memory for annotating '%s' symbol!\n",
213 sym->name);
214 sleep(1);
215 }
216
217 pthread_mutex_lock(&he->hists->lock);
218 }
219}
220
221static void perf_top__show_details(struct perf_top *top)
222{
223 struct hist_entry *he = top->sym_filter_entry;
224 struct annotation *notes;
225 struct symbol *symbol;
226 int more;
227
228 if (!he)
229 return;
230
231 symbol = he->ms.sym;
232 notes = symbol__annotation(symbol);
233
234 pthread_mutex_lock(¬es->lock);
235
236 if (notes->src == NULL)
237 goto out_unlock;
238
239 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
240 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
241
242 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
243 0, top->sym_pcnt_filter, top->print_entries, 4);
244
245 if (top->evlist->enabled) {
246 if (top->zero)
247 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
248 else
249 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
250 }
251 if (more != 0)
252 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
253out_unlock:
254 pthread_mutex_unlock(¬es->lock);
255}
256
257static void perf_top__print_sym_table(struct perf_top *top)
258{
259 char bf[160];
260 int printed = 0;
261 const int win_width = top->winsize.ws_col - 1;
262 struct perf_evsel *evsel = top->sym_evsel;
263 struct hists *hists = evsel__hists(evsel);
264
265 puts(CONSOLE_CLEAR);
266
267 perf_top__header_snprintf(top, bf, sizeof(bf));
268 printf("%s\n", bf);
269
270 perf_top__reset_sample_counters(top);
271
272 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
273
274 if (hists->stats.nr_lost_warned !=
275 hists->stats.nr_events[PERF_RECORD_LOST]) {
276 hists->stats.nr_lost_warned =
277 hists->stats.nr_events[PERF_RECORD_LOST];
278 color_fprintf(stdout, PERF_COLOR_RED,
279 "WARNING: LOST %d chunks, Check IO/CPU overload",
280 hists->stats.nr_lost_warned);
281 ++printed;
282 }
283
284 if (top->sym_filter_entry) {
285 perf_top__show_details(top);
286 return;
287 }
288
289 if (top->evlist->enabled) {
290 if (top->zero) {
291 hists__delete_entries(hists);
292 } else {
293 hists__decay_entries(hists, top->hide_user_symbols,
294 top->hide_kernel_symbols);
295 }
296 }
297
298 hists__collapse_resort(hists, NULL);
299 perf_evsel__output_resort(evsel, NULL);
300
301 hists__output_recalc_col_len(hists, top->print_entries - printed);
302 putchar('\n');
303 hists__fprintf(hists, false, top->print_entries - printed, win_width,
304 top->min_percent, stdout, symbol_conf.use_callchain);
305}
306
307static void prompt_integer(int *target, const char *msg)
308{
309 char *buf = malloc(0), *p;
310 size_t dummy = 0;
311 int tmp;
312
313 fprintf(stdout, "\n%s: ", msg);
314 if (getline(&buf, &dummy, stdin) < 0)
315 return;
316
317 p = strchr(buf, '\n');
318 if (p)
319 *p = 0;
320
321 p = buf;
322 while(*p) {
323 if (!isdigit(*p))
324 goto out_free;
325 p++;
326 }
327 tmp = strtoul(buf, NULL, 10);
328 *target = tmp;
329out_free:
330 free(buf);
331}
332
333static void prompt_percent(int *target, const char *msg)
334{
335 int tmp = 0;
336
337 prompt_integer(&tmp, msg);
338 if (tmp >= 0 && tmp <= 100)
339 *target = tmp;
340}
341
342static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
343{
344 char *buf = malloc(0), *p;
345 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
346 struct hists *hists = evsel__hists(top->sym_evsel);
347 struct rb_node *next;
348 size_t dummy = 0;
349
350 /* zero counters of active symbol */
351 if (syme) {
352 __zero_source_counters(syme);
353 top->sym_filter_entry = NULL;
354 }
355
356 fprintf(stdout, "\n%s: ", msg);
357 if (getline(&buf, &dummy, stdin) < 0)
358 goto out_free;
359
360 p = strchr(buf, '\n');
361 if (p)
362 *p = 0;
363
364 next = rb_first(&hists->entries);
365 while (next) {
366 n = rb_entry(next, struct hist_entry, rb_node);
367 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
368 found = n;
369 break;
370 }
371 next = rb_next(&n->rb_node);
372 }
373
374 if (!found) {
375 fprintf(stderr, "Sorry, %s is not active.\n", buf);
376 sleep(1);
377 } else
378 perf_top__parse_source(top, found);
379
380out_free:
381 free(buf);
382}
383
384static void perf_top__print_mapped_keys(struct perf_top *top)
385{
386 char *name = NULL;
387
388 if (top->sym_filter_entry) {
389 struct symbol *sym = top->sym_filter_entry->ms.sym;
390 name = sym->name;
391 }
392
393 fprintf(stdout, "\nMapped keys:\n");
394 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
395 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
396
397 if (top->evlist->nr_entries > 1)
398 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
399
400 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
401
402 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
403 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
404 fprintf(stdout, "\t[S] stop annotation.\n");
405
406 fprintf(stdout,
407 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
408 top->hide_kernel_symbols ? "yes" : "no");
409 fprintf(stdout,
410 "\t[U] hide user symbols. \t(%s)\n",
411 top->hide_user_symbols ? "yes" : "no");
412 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
413 fprintf(stdout, "\t[qQ] quit.\n");
414}
415
416static int perf_top__key_mapped(struct perf_top *top, int c)
417{
418 switch (c) {
419 case 'd':
420 case 'e':
421 case 'f':
422 case 'z':
423 case 'q':
424 case 'Q':
425 case 'K':
426 case 'U':
427 case 'F':
428 case 's':
429 case 'S':
430 return 1;
431 case 'E':
432 return top->evlist->nr_entries > 1 ? 1 : 0;
433 default:
434 break;
435 }
436
437 return 0;
438}
439
440static bool perf_top__handle_keypress(struct perf_top *top, int c)
441{
442 bool ret = true;
443
444 if (!perf_top__key_mapped(top, c)) {
445 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
446 struct termios save;
447
448 perf_top__print_mapped_keys(top);
449 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
450 fflush(stdout);
451
452 set_term_quiet_input(&save);
453
454 poll(&stdin_poll, 1, -1);
455 c = getc(stdin);
456
457 tcsetattr(0, TCSAFLUSH, &save);
458 if (!perf_top__key_mapped(top, c))
459 return ret;
460 }
461
462 switch (c) {
463 case 'd':
464 prompt_integer(&top->delay_secs, "Enter display delay");
465 if (top->delay_secs < 1)
466 top->delay_secs = 1;
467 break;
468 case 'e':
469 prompt_integer(&top->print_entries, "Enter display entries (lines)");
470 if (top->print_entries == 0) {
471 struct sigaction act = {
472 .sa_sigaction = perf_top__sig_winch,
473 .sa_flags = SA_SIGINFO,
474 };
475 perf_top__sig_winch(SIGWINCH, NULL, top);
476 sigaction(SIGWINCH, &act, NULL);
477 } else {
478 signal(SIGWINCH, SIG_DFL);
479 }
480 break;
481 case 'E':
482 if (top->evlist->nr_entries > 1) {
483 /* Select 0 as the default event: */
484 int counter = 0;
485
486 fprintf(stderr, "\nAvailable events:");
487
488 evlist__for_each_entry(top->evlist, top->sym_evsel)
489 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
490
491 prompt_integer(&counter, "Enter details event counter");
492
493 if (counter >= top->evlist->nr_entries) {
494 top->sym_evsel = perf_evlist__first(top->evlist);
495 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
496 sleep(1);
497 break;
498 }
499 evlist__for_each_entry(top->evlist, top->sym_evsel)
500 if (top->sym_evsel->idx == counter)
501 break;
502 } else
503 top->sym_evsel = perf_evlist__first(top->evlist);
504 break;
505 case 'f':
506 prompt_integer(&top->count_filter, "Enter display event count filter");
507 break;
508 case 'F':
509 prompt_percent(&top->sym_pcnt_filter,
510 "Enter details display event filter (percent)");
511 break;
512 case 'K':
513 top->hide_kernel_symbols = !top->hide_kernel_symbols;
514 break;
515 case 'q':
516 case 'Q':
517 printf("exiting.\n");
518 if (top->dump_symtab)
519 perf_session__fprintf_dsos(top->session, stderr);
520 ret = false;
521 break;
522 case 's':
523 perf_top__prompt_symbol(top, "Enter details symbol");
524 break;
525 case 'S':
526 if (!top->sym_filter_entry)
527 break;
528 else {
529 struct hist_entry *syme = top->sym_filter_entry;
530
531 top->sym_filter_entry = NULL;
532 __zero_source_counters(syme);
533 }
534 break;
535 case 'U':
536 top->hide_user_symbols = !top->hide_user_symbols;
537 break;
538 case 'z':
539 top->zero = !top->zero;
540 break;
541 default:
542 break;
543 }
544
545 return ret;
546}
547
548static void perf_top__sort_new_samples(void *arg)
549{
550 struct perf_top *t = arg;
551 struct perf_evsel *evsel = t->sym_evsel;
552 struct hists *hists;
553
554 perf_top__reset_sample_counters(t);
555
556 if (t->evlist->selected != NULL)
557 t->sym_evsel = t->evlist->selected;
558
559 hists = evsel__hists(evsel);
560
561 if (t->evlist->enabled) {
562 if (t->zero) {
563 hists__delete_entries(hists);
564 } else {
565 hists__decay_entries(hists, t->hide_user_symbols,
566 t->hide_kernel_symbols);
567 }
568 }
569
570 hists__collapse_resort(hists, NULL);
571 perf_evsel__output_resort(evsel, NULL);
572}
573
574static void *display_thread_tui(void *arg)
575{
576 struct perf_evsel *pos;
577 struct perf_top *top = arg;
578 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
579 struct hist_browser_timer hbt = {
580 .timer = perf_top__sort_new_samples,
581 .arg = top,
582 .refresh = top->delay_secs,
583 };
584
585 perf_top__sort_new_samples(top);
586
587 /*
588 * Initialize the uid_filter_str, in the future the TUI will allow
589 * Zooming in/out UIDs. For now juse use whatever the user passed
590 * via --uid.
591 */
592 evlist__for_each_entry(top->evlist, pos) {
593 struct hists *hists = evsel__hists(pos);
594 hists->uid_filter_str = top->record_opts.target.uid_str;
595 }
596
597 perf_evlist__tui_browse_hists(top->evlist, help, &hbt,
598 top->min_percent,
599 &top->session->header.env);
600
601 done = 1;
602 return NULL;
603}
604
605static void display_sig(int sig __maybe_unused)
606{
607 done = 1;
608}
609
610static void display_setup_sig(void)
611{
612 signal(SIGSEGV, sighandler_dump_stack);
613 signal(SIGFPE, sighandler_dump_stack);
614 signal(SIGINT, display_sig);
615 signal(SIGQUIT, display_sig);
616 signal(SIGTERM, display_sig);
617}
618
619static void *display_thread(void *arg)
620{
621 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
622 struct termios save;
623 struct perf_top *top = arg;
624 int delay_msecs, c;
625
626 display_setup_sig();
627 pthread__unblock_sigwinch();
628repeat:
629 delay_msecs = top->delay_secs * MSEC_PER_SEC;
630 set_term_quiet_input(&save);
631 /* trash return*/
632 getc(stdin);
633
634 while (!done) {
635 perf_top__print_sym_table(top);
636 /*
637 * Either timeout expired or we got an EINTR due to SIGWINCH,
638 * refresh screen in both cases.
639 */
640 switch (poll(&stdin_poll, 1, delay_msecs)) {
641 case 0:
642 continue;
643 case -1:
644 if (errno == EINTR)
645 continue;
646 /* Fall trhu */
647 default:
648 c = getc(stdin);
649 tcsetattr(0, TCSAFLUSH, &save);
650
651 if (perf_top__handle_keypress(top, c))
652 goto repeat;
653 done = 1;
654 }
655 }
656
657 tcsetattr(0, TCSAFLUSH, &save);
658 return NULL;
659}
660
661static int hist_iter__top_callback(struct hist_entry_iter *iter,
662 struct addr_location *al, bool single,
663 void *arg)
664{
665 struct perf_top *top = arg;
666 struct hist_entry *he = iter->he;
667 struct perf_evsel *evsel = iter->evsel;
668
669 if (perf_hpp_list.sym && single)
670 perf_top__record_precise_ip(top, he, evsel->idx, al->addr);
671
672 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
673 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY));
674 return 0;
675}
676
677static void perf_event__process_sample(struct perf_tool *tool,
678 const union perf_event *event,
679 struct perf_evsel *evsel,
680 struct perf_sample *sample,
681 struct machine *machine)
682{
683 struct perf_top *top = container_of(tool, struct perf_top, tool);
684 struct addr_location al;
685 int err;
686
687 if (!machine && perf_guest) {
688 static struct intlist *seen;
689
690 if (!seen)
691 seen = intlist__new(NULL);
692
693 if (!intlist__has_entry(seen, sample->pid)) {
694 pr_err("Can't find guest [%d]'s kernel information\n",
695 sample->pid);
696 intlist__add(seen, sample->pid);
697 }
698 return;
699 }
700
701 if (!machine) {
702 pr_err("%u unprocessable samples recorded.\r",
703 top->session->evlist->stats.nr_unprocessable_samples++);
704 return;
705 }
706
707 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
708 top->exact_samples++;
709
710 if (machine__resolve(machine, &al, sample) < 0)
711 return;
712
713 if (!machine->kptr_restrict_warned &&
714 symbol_conf.kptr_restrict &&
715 al.cpumode == PERF_RECORD_MISC_KERNEL) {
716 ui__warning(
717"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
718"Check /proc/sys/kernel/kptr_restrict.\n\n"
719"Kernel%s samples will not be resolved.\n",
720 al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
721 " modules" : "");
722 if (use_browser <= 0)
723 sleep(5);
724 machine->kptr_restrict_warned = true;
725 }
726
727 if (al.sym == NULL) {
728 const char *msg = "Kernel samples will not be resolved.\n";
729 /*
730 * As we do lazy loading of symtabs we only will know if the
731 * specified vmlinux file is invalid when we actually have a
732 * hit in kernel space and then try to load it. So if we get
733 * here and there are _no_ symbols in the DSO backing the
734 * kernel map, bail out.
735 *
736 * We may never get here, for instance, if we use -K/
737 * --hide-kernel-symbols, even if the user specifies an
738 * invalid --vmlinux ;-)
739 */
740 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
741 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
742 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
743 if (symbol_conf.vmlinux_name) {
744 char serr[256];
745 dso__strerror_load(al.map->dso, serr, sizeof(serr));
746 ui__warning("The %s file can't be used: %s\n%s",
747 symbol_conf.vmlinux_name, serr, msg);
748 } else {
749 ui__warning("A vmlinux file was not found.\n%s",
750 msg);
751 }
752
753 if (use_browser <= 0)
754 sleep(5);
755 top->vmlinux_warned = true;
756 }
757 }
758
759 if (al.sym == NULL || !al.sym->idle) {
760 struct hists *hists = evsel__hists(evsel);
761 struct hist_entry_iter iter = {
762 .evsel = evsel,
763 .sample = sample,
764 .add_entry_cb = hist_iter__top_callback,
765 };
766
767 if (symbol_conf.cumulate_callchain)
768 iter.ops = &hist_iter_cumulative;
769 else
770 iter.ops = &hist_iter_normal;
771
772 pthread_mutex_lock(&hists->lock);
773
774 err = hist_entry_iter__add(&iter, &al, top->max_stack, top);
775 if (err < 0)
776 pr_err("Problem incrementing symbol period, skipping event\n");
777
778 pthread_mutex_unlock(&hists->lock);
779 }
780
781 addr_location__put(&al);
782}
783
784static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
785{
786 struct perf_sample sample;
787 struct perf_evsel *evsel;
788 struct perf_session *session = top->session;
789 union perf_event *event;
790 struct machine *machine;
791 int ret;
792
793 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
794 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
795 if (ret) {
796 pr_err("Can't parse sample, err = %d\n", ret);
797 goto next_event;
798 }
799
800 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
801 assert(evsel != NULL);
802
803 if (event->header.type == PERF_RECORD_SAMPLE)
804 ++top->samples;
805
806 switch (sample.cpumode) {
807 case PERF_RECORD_MISC_USER:
808 ++top->us_samples;
809 if (top->hide_user_symbols)
810 goto next_event;
811 machine = &session->machines.host;
812 break;
813 case PERF_RECORD_MISC_KERNEL:
814 ++top->kernel_samples;
815 if (top->hide_kernel_symbols)
816 goto next_event;
817 machine = &session->machines.host;
818 break;
819 case PERF_RECORD_MISC_GUEST_KERNEL:
820 ++top->guest_kernel_samples;
821 machine = perf_session__find_machine(session,
822 sample.pid);
823 break;
824 case PERF_RECORD_MISC_GUEST_USER:
825 ++top->guest_us_samples;
826 /*
827 * TODO: we don't process guest user from host side
828 * except simple counting.
829 */
830 goto next_event;
831 default:
832 if (event->header.type == PERF_RECORD_SAMPLE)
833 goto next_event;
834 machine = &session->machines.host;
835 break;
836 }
837
838
839 if (event->header.type == PERF_RECORD_SAMPLE) {
840 perf_event__process_sample(&top->tool, event, evsel,
841 &sample, machine);
842 } else if (event->header.type < PERF_RECORD_MAX) {
843 hists__inc_nr_events(evsel__hists(evsel), event->header.type);
844 machine__process_event(machine, event, &sample);
845 } else
846 ++session->evlist->stats.nr_unknown_events;
847next_event:
848 perf_evlist__mmap_consume(top->evlist, idx);
849 }
850}
851
852static void perf_top__mmap_read(struct perf_top *top)
853{
854 int i;
855
856 for (i = 0; i < top->evlist->nr_mmaps; i++)
857 perf_top__mmap_read_idx(top, i);
858}
859
860static int perf_top__start_counters(struct perf_top *top)
861{
862 char msg[512];
863 struct perf_evsel *counter;
864 struct perf_evlist *evlist = top->evlist;
865 struct record_opts *opts = &top->record_opts;
866
867 perf_evlist__config(evlist, opts, &callchain_param);
868
869 evlist__for_each_entry(evlist, counter) {
870try_again:
871 if (perf_evsel__open(counter, top->evlist->cpus,
872 top->evlist->threads) < 0) {
873 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
874 if (verbose)
875 ui__warning("%s\n", msg);
876 goto try_again;
877 }
878
879 perf_evsel__open_strerror(counter, &opts->target,
880 errno, msg, sizeof(msg));
881 ui__error("%s\n", msg);
882 goto out_err;
883 }
884 }
885
886 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
887 ui__error("Failed to mmap with %d (%s)\n",
888 errno, str_error_r(errno, msg, sizeof(msg)));
889 goto out_err;
890 }
891
892 return 0;
893
894out_err:
895 return -1;
896}
897
898static int callchain_param__setup_sample_type(struct callchain_param *callchain)
899{
900 if (!perf_hpp_list.sym) {
901 if (callchain->enabled) {
902 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
903 return -EINVAL;
904 }
905 } else if (callchain->mode != CHAIN_NONE) {
906 if (callchain_register_param(callchain) < 0) {
907 ui__error("Can't register callchain params.\n");
908 return -EINVAL;
909 }
910 }
911
912 return 0;
913}
914
915static int __cmd_top(struct perf_top *top)
916{
917 char msg[512];
918 struct perf_evsel *pos;
919 struct perf_evsel_config_term *err_term;
920 struct perf_evlist *evlist = top->evlist;
921 struct record_opts *opts = &top->record_opts;
922 pthread_t thread;
923 int ret;
924
925 top->session = perf_session__new(NULL, false, NULL);
926 if (top->session == NULL)
927 return -1;
928
929 if (!objdump_path) {
930 ret = perf_env__lookup_objdump(&top->session->header.env);
931 if (ret)
932 goto out_delete;
933 }
934
935 ret = callchain_param__setup_sample_type(&callchain_param);
936 if (ret)
937 goto out_delete;
938
939 if (perf_session__register_idle_thread(top->session) < 0)
940 goto out_delete;
941
942 machine__synthesize_threads(&top->session->machines.host, &opts->target,
943 top->evlist->threads, false, opts->proc_map_timeout);
944
945 if (perf_hpp_list.socket) {
946 ret = perf_env__read_cpu_topology_map(&perf_env);
947 if (ret < 0)
948 goto out_err_cpu_topo;
949 }
950
951 ret = perf_top__start_counters(top);
952 if (ret)
953 goto out_delete;
954
955 ret = perf_evlist__apply_drv_configs(evlist, &pos, &err_term);
956 if (ret) {
957 error("failed to set config \"%s\" on event %s with %d (%s)\n",
958 err_term->val.drv_cfg, perf_evsel__name(pos), errno,
959 str_error_r(errno, msg, sizeof(msg)));
960 goto out_delete;
961 }
962
963 top->session->evlist = top->evlist;
964 perf_session__set_id_hdr_size(top->session);
965
966 /*
967 * When perf is starting the traced process, all the events (apart from
968 * group members) have enable_on_exec=1 set, so don't spoil it by
969 * prematurely enabling them.
970 *
971 * XXX 'top' still doesn't start workloads like record, trace, but should,
972 * so leave the check here.
973 */
974 if (!target__none(&opts->target))
975 perf_evlist__enable(top->evlist);
976
977 /* Wait for a minimal set of events before starting the snapshot */
978 perf_evlist__poll(top->evlist, 100);
979
980 perf_top__mmap_read(top);
981
982 ret = -1;
983 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
984 display_thread), top)) {
985 ui__error("Could not create display thread.\n");
986 goto out_delete;
987 }
988
989 if (top->realtime_prio) {
990 struct sched_param param;
991
992 param.sched_priority = top->realtime_prio;
993 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
994 ui__error("Could not set realtime priority.\n");
995 goto out_join;
996 }
997 }
998
999 while (!done) {
1000 u64 hits = top->samples;
1001
1002 perf_top__mmap_read(top);
1003
1004 if (hits == top->samples)
1005 ret = perf_evlist__poll(top->evlist, 100);
1006 }
1007
1008 ret = 0;
1009out_join:
1010 pthread_join(thread, NULL);
1011out_delete:
1012 perf_session__delete(top->session);
1013 top->session = NULL;
1014
1015 return ret;
1016
1017out_err_cpu_topo: {
1018 char errbuf[BUFSIZ];
1019 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1020
1021 ui__error("Could not read the CPU topology map: %s\n", err);
1022 goto out_delete;
1023}
1024}
1025
1026static int
1027callchain_opt(const struct option *opt, const char *arg, int unset)
1028{
1029 symbol_conf.use_callchain = true;
1030 return record_callchain_opt(opt, arg, unset);
1031}
1032
1033static int
1034parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1035{
1036 struct callchain_param *callchain = opt->value;
1037
1038 callchain->enabled = !unset;
1039 callchain->record_mode = CALLCHAIN_FP;
1040
1041 /*
1042 * --no-call-graph
1043 */
1044 if (unset) {
1045 symbol_conf.use_callchain = false;
1046 callchain->record_mode = CALLCHAIN_NONE;
1047 return 0;
1048 }
1049
1050 return parse_callchain_top_opt(arg);
1051}
1052
1053static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1054{
1055 if (!strcmp(var, "top.call-graph"))
1056 var = "call-graph.record-mode"; /* fall-through */
1057 if (!strcmp(var, "top.children")) {
1058 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1059 return 0;
1060 }
1061
1062 return 0;
1063}
1064
1065static int
1066parse_percent_limit(const struct option *opt, const char *arg,
1067 int unset __maybe_unused)
1068{
1069 struct perf_top *top = opt->value;
1070
1071 top->min_percent = strtof(arg, NULL);
1072 return 0;
1073}
1074
1075const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1076 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1077
1078int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1079{
1080 char errbuf[BUFSIZ];
1081 struct perf_top top = {
1082 .count_filter = 5,
1083 .delay_secs = 2,
1084 .record_opts = {
1085 .mmap_pages = UINT_MAX,
1086 .user_freq = UINT_MAX,
1087 .user_interval = ULLONG_MAX,
1088 .freq = 4000, /* 4 KHz */
1089 .target = {
1090 .uses_mmap = true,
1091 },
1092 .proc_map_timeout = 500,
1093 },
1094 .max_stack = sysctl_perf_event_max_stack,
1095 .sym_pcnt_filter = 5,
1096 };
1097 struct record_opts *opts = &top.record_opts;
1098 struct target *target = &opts->target;
1099 const struct option options[] = {
1100 OPT_CALLBACK('e', "event", &top.evlist, "event",
1101 "event selector. use 'perf list' to list available events",
1102 parse_events_option),
1103 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1104 OPT_STRING('p', "pid", &target->pid, "pid",
1105 "profile events on existing process id"),
1106 OPT_STRING('t', "tid", &target->tid, "tid",
1107 "profile events on existing thread id"),
1108 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1109 "system-wide collection from all CPUs"),
1110 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1111 "list of cpus to monitor"),
1112 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1113 "file", "vmlinux pathname"),
1114 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1115 "don't load vmlinux even if found"),
1116 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1117 "hide kernel symbols"),
1118 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1119 "number of mmap data pages",
1120 perf_evlist__parse_mmap_pages),
1121 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1122 "collect data with this RT SCHED_FIFO priority"),
1123 OPT_INTEGER('d', "delay", &top.delay_secs,
1124 "number of seconds to delay between refreshes"),
1125 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1126 "dump the symbol table used for profiling"),
1127 OPT_INTEGER('f', "count-filter", &top.count_filter,
1128 "only display functions with more events than this"),
1129 OPT_BOOLEAN(0, "group", &opts->group,
1130 "put the counters into a counter group"),
1131 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1132 "child tasks do not inherit counters"),
1133 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1134 "symbol to annotate"),
1135 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1136 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1137 OPT_INTEGER('E', "entries", &top.print_entries,
1138 "display this many functions"),
1139 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1140 "hide user symbols"),
1141 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1142 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1143 OPT_INCR('v', "verbose", &verbose,
1144 "be more verbose (show counter open errors, etc)"),
1145 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1146 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1147 " Please refer the man page for the complete list."),
1148 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1149 "output field(s): overhead, period, sample plus all of sort keys"),
1150 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1151 "Show a column with the number of samples"),
1152 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1153 NULL, "enables call-graph recording and display",
1154 &callchain_opt),
1155 OPT_CALLBACK(0, "call-graph", &callchain_param,
1156 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1157 top_callchain_help, &parse_callchain_opt),
1158 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1159 "Accumulate callchains of children and show total overhead as well"),
1160 OPT_INTEGER(0, "max-stack", &top.max_stack,
1161 "Set the maximum stack depth when parsing the callchain. "
1162 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1163 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1164 "ignore callees of these functions in call graphs",
1165 report_parse_ignore_callees_opt),
1166 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1167 "Show a column with the sum of periods"),
1168 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1169 "only consider symbols in these dsos"),
1170 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1171 "only consider symbols in these comms"),
1172 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1173 "only consider these symbols"),
1174 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1175 "Interleave source code with assembly code (default)"),
1176 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1177 "Display raw encoding of assembly instructions (default)"),
1178 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1179 "Enable kernel symbol demangling"),
1180 OPT_STRING(0, "objdump", &objdump_path, "path",
1181 "objdump binary to use for disassembly and annotations"),
1182 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1183 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1184 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1185 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1186 "Don't show entries under that percent", parse_percent_limit),
1187 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1188 "How to display percentage of filtered entries", parse_filter_percentage),
1189 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1190 "width[,width...]",
1191 "don't try to adjust column width, use these fixed values"),
1192 OPT_UINTEGER(0, "proc-map-timeout", &opts->proc_map_timeout,
1193 "per thread proc mmap processing timeout in ms"),
1194 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1195 "branch any", "sample any taken branches",
1196 parse_branch_stack),
1197 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1198 "branch filter mask", "branch stack filter modes",
1199 parse_branch_stack),
1200 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1201 "Show raw trace event output (do not use print fmt or plugins)"),
1202 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1203 "Show entries in a hierarchy"),
1204 OPT_END()
1205 };
1206 const char * const top_usage[] = {
1207 "perf top [<options>]",
1208 NULL
1209 };
1210 int status = hists__init();
1211
1212 if (status < 0)
1213 return status;
1214
1215 top.evlist = perf_evlist__new();
1216 if (top.evlist == NULL)
1217 return -ENOMEM;
1218
1219 perf_config(perf_top_config, &top);
1220
1221 argc = parse_options(argc, argv, options, top_usage, 0);
1222 if (argc)
1223 usage_with_options(top_usage, options);
1224
1225 if (!top.evlist->nr_entries &&
1226 perf_evlist__add_default(top.evlist) < 0) {
1227 pr_err("Not enough memory for event selector list\n");
1228 goto out_delete_evlist;
1229 }
1230
1231 if (symbol_conf.report_hierarchy) {
1232 /* disable incompatible options */
1233 symbol_conf.event_group = false;
1234 symbol_conf.cumulate_callchain = false;
1235
1236 if (field_order) {
1237 pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1238 parse_options_usage(top_usage, options, "fields", 0);
1239 parse_options_usage(NULL, options, "hierarchy", 0);
1240 goto out_delete_evlist;
1241 }
1242 }
1243
1244 sort__mode = SORT_MODE__TOP;
1245 /* display thread wants entries to be collapsed in a different tree */
1246 perf_hpp_list.need_collapse = 1;
1247
1248 if (top.use_stdio)
1249 use_browser = 0;
1250 else if (top.use_tui)
1251 use_browser = 1;
1252
1253 setup_browser(false);
1254
1255 if (setup_sorting(top.evlist) < 0) {
1256 if (sort_order)
1257 parse_options_usage(top_usage, options, "s", 1);
1258 if (field_order)
1259 parse_options_usage(sort_order ? NULL : top_usage,
1260 options, "fields", 0);
1261 goto out_delete_evlist;
1262 }
1263
1264 status = target__validate(target);
1265 if (status) {
1266 target__strerror(target, status, errbuf, BUFSIZ);
1267 ui__warning("%s\n", errbuf);
1268 }
1269
1270 status = target__parse_uid(target);
1271 if (status) {
1272 int saved_errno = errno;
1273
1274 target__strerror(target, status, errbuf, BUFSIZ);
1275 ui__error("%s\n", errbuf);
1276
1277 status = -saved_errno;
1278 goto out_delete_evlist;
1279 }
1280
1281 if (target__none(target))
1282 target->system_wide = true;
1283
1284 if (perf_evlist__create_maps(top.evlist, target) < 0) {
1285 ui__error("Couldn't create thread/CPU maps: %s\n",
1286 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1287 goto out_delete_evlist;
1288 }
1289
1290 symbol_conf.nr_events = top.evlist->nr_entries;
1291
1292 if (top.delay_secs < 1)
1293 top.delay_secs = 1;
1294
1295 if (record_opts__config(opts)) {
1296 status = -EINVAL;
1297 goto out_delete_evlist;
1298 }
1299
1300 top.sym_evsel = perf_evlist__first(top.evlist);
1301
1302 if (!callchain_param.enabled) {
1303 symbol_conf.cumulate_callchain = false;
1304 perf_hpp__cancel_cumulate();
1305 }
1306
1307 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1308 callchain_param.order = ORDER_CALLER;
1309
1310 status = symbol__annotation_init();
1311 if (status < 0)
1312 goto out_delete_evlist;
1313
1314 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1315 if (symbol__init(NULL) < 0)
1316 return -1;
1317
1318 sort__setup_elide(stdout);
1319
1320 get_term_dimensions(&top.winsize);
1321 if (top.print_entries == 0) {
1322 struct sigaction act = {
1323 .sa_sigaction = perf_top__sig_winch,
1324 .sa_flags = SA_SIGINFO,
1325 };
1326 perf_top__update_print_entries(&top);
1327 sigaction(SIGWINCH, &act, NULL);
1328 }
1329
1330 status = __cmd_top(&top);
1331
1332out_delete_evlist:
1333 perf_evlist__delete(top.evlist);
1334
1335 return status;
1336}