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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/cache.h"
26#include "util/color.h"
27#include "util/evlist.h"
28#include "util/evsel.h"
29#include "util/session.h"
30#include "util/symbol.h"
31#include "util/thread.h"
32#include "util/thread_map.h"
33#include "util/top.h"
34#include "util/util.h"
35#include <linux/rbtree.h>
36#include "util/parse-options.h"
37#include "util/parse-events.h"
38#include "util/cpumap.h"
39#include "util/xyarray.h"
40#include "util/sort.h"
41
42#include "util/debug.h"
43
44#include <assert.h>
45#include <elf.h>
46#include <fcntl.h>
47
48#include <stdio.h>
49#include <termios.h>
50#include <unistd.h>
51#include <inttypes.h>
52
53#include <errno.h>
54#include <time.h>
55#include <sched.h>
56
57#include <sys/syscall.h>
58#include <sys/ioctl.h>
59#include <sys/poll.h>
60#include <sys/prctl.h>
61#include <sys/wait.h>
62#include <sys/uio.h>
63#include <sys/utsname.h>
64#include <sys/mman.h>
65
66#include <linux/unistd.h>
67#include <linux/types.h>
68
69void get_term_dimensions(struct winsize *ws)
70{
71 char *s = getenv("LINES");
72
73 if (s != NULL) {
74 ws->ws_row = atoi(s);
75 s = getenv("COLUMNS");
76 if (s != NULL) {
77 ws->ws_col = atoi(s);
78 if (ws->ws_row && ws->ws_col)
79 return;
80 }
81 }
82#ifdef TIOCGWINSZ
83 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
84 ws->ws_row && ws->ws_col)
85 return;
86#endif
87 ws->ws_row = 25;
88 ws->ws_col = 80;
89}
90
91static void perf_top__update_print_entries(struct perf_top *top)
92{
93 if (top->print_entries > 9)
94 top->print_entries -= 9;
95}
96
97static void perf_top__sig_winch(int sig __used, siginfo_t *info __used, void *arg)
98{
99 struct perf_top *top = arg;
100
101 get_term_dimensions(&top->winsize);
102 if (!top->print_entries
103 || (top->print_entries+4) > top->winsize.ws_row) {
104 top->print_entries = top->winsize.ws_row;
105 } else {
106 top->print_entries += 4;
107 top->winsize.ws_row = top->print_entries;
108 }
109 perf_top__update_print_entries(top);
110}
111
112static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
113{
114 struct symbol *sym;
115 struct annotation *notes;
116 struct map *map;
117 int err = -1;
118
119 if (!he || !he->ms.sym)
120 return -1;
121
122 sym = he->ms.sym;
123 map = he->ms.map;
124
125 /*
126 * We can't annotate with just /proc/kallsyms
127 */
128 if (map->dso->symtab_type == SYMTAB__KALLSYMS) {
129 pr_err("Can't annotate %s: No vmlinux file was found in the "
130 "path\n", sym->name);
131 sleep(1);
132 return -1;
133 }
134
135 notes = symbol__annotation(sym);
136 if (notes->src != NULL) {
137 pthread_mutex_lock(¬es->lock);
138 goto out_assign;
139 }
140
141 pthread_mutex_lock(¬es->lock);
142
143 if (symbol__alloc_hist(sym) < 0) {
144 pthread_mutex_unlock(¬es->lock);
145 pr_err("Not enough memory for annotating '%s' symbol!\n",
146 sym->name);
147 sleep(1);
148 return err;
149 }
150
151 err = symbol__annotate(sym, map, 0);
152 if (err == 0) {
153out_assign:
154 top->sym_filter_entry = he;
155 }
156
157 pthread_mutex_unlock(¬es->lock);
158 return err;
159}
160
161static void __zero_source_counters(struct hist_entry *he)
162{
163 struct symbol *sym = he->ms.sym;
164 symbol__annotate_zero_histograms(sym);
165}
166
167static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
168{
169 struct utsname uts;
170 int err = uname(&uts);
171
172 ui__warning("Out of bounds address found:\n\n"
173 "Addr: %" PRIx64 "\n"
174 "DSO: %s %c\n"
175 "Map: %" PRIx64 "-%" PRIx64 "\n"
176 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
177 "Arch: %s\n"
178 "Kernel: %s\n"
179 "Tools: %s\n\n"
180 "Not all samples will be on the annotation output.\n\n"
181 "Please report to linux-kernel@vger.kernel.org\n",
182 ip, map->dso->long_name, dso__symtab_origin(map->dso),
183 map->start, map->end, sym->start, sym->end,
184 sym->binding == STB_GLOBAL ? 'g' :
185 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
186 err ? "[unknown]" : uts.machine,
187 err ? "[unknown]" : uts.release, perf_version_string);
188 if (use_browser <= 0)
189 sleep(5);
190
191 map->erange_warned = true;
192}
193
194static void perf_top__record_precise_ip(struct perf_top *top,
195 struct hist_entry *he,
196 int counter, u64 ip)
197{
198 struct annotation *notes;
199 struct symbol *sym;
200 int err;
201
202 if (he == NULL || he->ms.sym == NULL ||
203 ((top->sym_filter_entry == NULL ||
204 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
205 return;
206
207 sym = he->ms.sym;
208 notes = symbol__annotation(sym);
209
210 if (pthread_mutex_trylock(¬es->lock))
211 return;
212
213 if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
214 pthread_mutex_unlock(¬es->lock);
215 pr_err("Not enough memory for annotating '%s' symbol!\n",
216 sym->name);
217 sleep(1);
218 return;
219 }
220
221 ip = he->ms.map->map_ip(he->ms.map, ip);
222 err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
223
224 pthread_mutex_unlock(¬es->lock);
225
226 if (err == -ERANGE && !he->ms.map->erange_warned)
227 ui__warn_map_erange(he->ms.map, sym, ip);
228}
229
230static void perf_top__show_details(struct perf_top *top)
231{
232 struct hist_entry *he = top->sym_filter_entry;
233 struct annotation *notes;
234 struct symbol *symbol;
235 int more;
236
237 if (!he)
238 return;
239
240 symbol = he->ms.sym;
241 notes = symbol__annotation(symbol);
242
243 pthread_mutex_lock(¬es->lock);
244
245 if (notes->src == NULL)
246 goto out_unlock;
247
248 printf("Showing %s for %s\n", event_name(top->sym_evsel), symbol->name);
249 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
250
251 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
252 0, top->sym_pcnt_filter, top->print_entries, 4);
253 if (top->zero)
254 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
255 else
256 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
257 if (more != 0)
258 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
259out_unlock:
260 pthread_mutex_unlock(¬es->lock);
261}
262
263static const char CONSOLE_CLEAR[] = "[H[2J";
264
265static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
266 struct addr_location *al,
267 struct perf_sample *sample)
268{
269 struct hist_entry *he;
270
271 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
272 if (he == NULL)
273 return NULL;
274
275 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
276 return he;
277}
278
279static void perf_top__print_sym_table(struct perf_top *top)
280{
281 char bf[160];
282 int printed = 0;
283 const int win_width = top->winsize.ws_col - 1;
284
285 puts(CONSOLE_CLEAR);
286
287 perf_top__header_snprintf(top, bf, sizeof(bf));
288 printf("%s\n", bf);
289
290 perf_top__reset_sample_counters(top);
291
292 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
293
294 if (top->sym_evsel->hists.stats.nr_lost_warned !=
295 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
296 top->sym_evsel->hists.stats.nr_lost_warned =
297 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
298 color_fprintf(stdout, PERF_COLOR_RED,
299 "WARNING: LOST %d chunks, Check IO/CPU overload",
300 top->sym_evsel->hists.stats.nr_lost_warned);
301 ++printed;
302 }
303
304 if (top->sym_filter_entry) {
305 perf_top__show_details(top);
306 return;
307 }
308
309 hists__collapse_resort_threaded(&top->sym_evsel->hists);
310 hists__output_resort_threaded(&top->sym_evsel->hists);
311 hists__decay_entries_threaded(&top->sym_evsel->hists,
312 top->hide_user_symbols,
313 top->hide_kernel_symbols);
314 hists__output_recalc_col_len(&top->sym_evsel->hists,
315 top->winsize.ws_row - 3);
316 putchar('\n');
317 hists__fprintf(&top->sym_evsel->hists, NULL, false, false,
318 top->winsize.ws_row - 4 - printed, win_width, stdout);
319}
320
321static void prompt_integer(int *target, const char *msg)
322{
323 char *buf = malloc(0), *p;
324 size_t dummy = 0;
325 int tmp;
326
327 fprintf(stdout, "\n%s: ", msg);
328 if (getline(&buf, &dummy, stdin) < 0)
329 return;
330
331 p = strchr(buf, '\n');
332 if (p)
333 *p = 0;
334
335 p = buf;
336 while(*p) {
337 if (!isdigit(*p))
338 goto out_free;
339 p++;
340 }
341 tmp = strtoul(buf, NULL, 10);
342 *target = tmp;
343out_free:
344 free(buf);
345}
346
347static void prompt_percent(int *target, const char *msg)
348{
349 int tmp = 0;
350
351 prompt_integer(&tmp, msg);
352 if (tmp >= 0 && tmp <= 100)
353 *target = tmp;
354}
355
356static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
357{
358 char *buf = malloc(0), *p;
359 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
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(&top->sym_evsel->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", event_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 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 void perf_top__handle_keypress(struct perf_top *top, int c)
454{
455 if (!perf_top__key_mapped(top, c)) {
456 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
457 struct termios tc, save;
458
459 perf_top__print_mapped_keys(top);
460 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
461 fflush(stdout);
462
463 tcgetattr(0, &save);
464 tc = save;
465 tc.c_lflag &= ~(ICANON | ECHO);
466 tc.c_cc[VMIN] = 0;
467 tc.c_cc[VTIME] = 0;
468 tcsetattr(0, TCSANOW, &tc);
469
470 poll(&stdin_poll, 1, -1);
471 c = getc(stdin);
472
473 tcsetattr(0, TCSAFLUSH, &save);
474 if (!perf_top__key_mapped(top, c))
475 return;
476 }
477
478 switch (c) {
479 case 'd':
480 prompt_integer(&top->delay_secs, "Enter display delay");
481 if (top->delay_secs < 1)
482 top->delay_secs = 1;
483 break;
484 case 'e':
485 prompt_integer(&top->print_entries, "Enter display entries (lines)");
486 if (top->print_entries == 0) {
487 struct sigaction act = {
488 .sa_sigaction = perf_top__sig_winch,
489 .sa_flags = SA_SIGINFO,
490 };
491 perf_top__sig_winch(SIGWINCH, NULL, top);
492 sigaction(SIGWINCH, &act, NULL);
493 } else {
494 perf_top__sig_winch(SIGWINCH, NULL, top);
495 signal(SIGWINCH, SIG_DFL);
496 }
497 break;
498 case 'E':
499 if (top->evlist->nr_entries > 1) {
500 /* Select 0 as the default event: */
501 int counter = 0;
502
503 fprintf(stderr, "\nAvailable events:");
504
505 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
506 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, event_name(top->sym_evsel));
507
508 prompt_integer(&counter, "Enter details event counter");
509
510 if (counter >= top->evlist->nr_entries) {
511 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
512 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top->sym_evsel));
513 sleep(1);
514 break;
515 }
516 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
517 if (top->sym_evsel->idx == counter)
518 break;
519 } else
520 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
521 break;
522 case 'f':
523 prompt_integer(&top->count_filter, "Enter display event count filter");
524 break;
525 case 'F':
526 prompt_percent(&top->sym_pcnt_filter,
527 "Enter details display event filter (percent)");
528 break;
529 case 'K':
530 top->hide_kernel_symbols = !top->hide_kernel_symbols;
531 break;
532 case 'q':
533 case 'Q':
534 printf("exiting.\n");
535 if (top->dump_symtab)
536 perf_session__fprintf_dsos(top->session, stderr);
537 exit(0);
538 case 's':
539 perf_top__prompt_symbol(top, "Enter details symbol");
540 break;
541 case 'S':
542 if (!top->sym_filter_entry)
543 break;
544 else {
545 struct hist_entry *syme = top->sym_filter_entry;
546
547 top->sym_filter_entry = NULL;
548 __zero_source_counters(syme);
549 }
550 break;
551 case 'U':
552 top->hide_user_symbols = !top->hide_user_symbols;
553 break;
554 case 'z':
555 top->zero = !top->zero;
556 break;
557 default:
558 break;
559 }
560}
561
562static void perf_top__sort_new_samples(void *arg)
563{
564 struct perf_top *t = arg;
565 perf_top__reset_sample_counters(t);
566
567 if (t->evlist->selected != NULL)
568 t->sym_evsel = t->evlist->selected;
569
570 hists__collapse_resort_threaded(&t->sym_evsel->hists);
571 hists__output_resort_threaded(&t->sym_evsel->hists);
572 hists__decay_entries_threaded(&t->sym_evsel->hists,
573 t->hide_user_symbols,
574 t->hide_kernel_symbols);
575}
576
577static void *display_thread_tui(void *arg)
578{
579 struct perf_evsel *pos;
580 struct perf_top *top = arg;
581 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
582
583 perf_top__sort_new_samples(top);
584
585 /*
586 * Initialize the uid_filter_str, in the future the TUI will allow
587 * Zooming in/out UIDs. For now juse use whatever the user passed
588 * via --uid.
589 */
590 list_for_each_entry(pos, &top->evlist->entries, node)
591 pos->hists.uid_filter_str = top->target.uid_str;
592
593 perf_evlist__tui_browse_hists(top->evlist, help,
594 perf_top__sort_new_samples,
595 top, top->delay_secs);
596
597 exit_browser(0);
598 exit(0);
599 return NULL;
600}
601
602static void *display_thread(void *arg)
603{
604 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
605 struct termios tc, save;
606 struct perf_top *top = arg;
607 int delay_msecs, c;
608
609 tcgetattr(0, &save);
610 tc = save;
611 tc.c_lflag &= ~(ICANON | ECHO);
612 tc.c_cc[VMIN] = 0;
613 tc.c_cc[VTIME] = 0;
614
615 pthread__unblock_sigwinch();
616repeat:
617 delay_msecs = top->delay_secs * 1000;
618 tcsetattr(0, TCSANOW, &tc);
619 /* trash return*/
620 getc(stdin);
621
622 while (1) {
623 perf_top__print_sym_table(top);
624 /*
625 * Either timeout expired or we got an EINTR due to SIGWINCH,
626 * refresh screen in both cases.
627 */
628 switch (poll(&stdin_poll, 1, delay_msecs)) {
629 case 0:
630 continue;
631 case -1:
632 if (errno == EINTR)
633 continue;
634 /* Fall trhu */
635 default:
636 goto process_hotkey;
637 }
638 }
639process_hotkey:
640 c = getc(stdin);
641 tcsetattr(0, TCSAFLUSH, &save);
642
643 perf_top__handle_keypress(top, c);
644 goto repeat;
645
646 return NULL;
647}
648
649/* Tag samples to be skipped. */
650static const char *skip_symbols[] = {
651 "intel_idle",
652 "default_idle",
653 "native_safe_halt",
654 "cpu_idle",
655 "enter_idle",
656 "exit_idle",
657 "mwait_idle",
658 "mwait_idle_with_hints",
659 "poll_idle",
660 "ppc64_runlatch_off",
661 "pseries_dedicated_idle_sleep",
662 NULL
663};
664
665static int symbol_filter(struct map *map __used, struct symbol *sym)
666{
667 const char *name = sym->name;
668 int i;
669
670 /*
671 * ppc64 uses function descriptors and appends a '.' to the
672 * start of every instruction address. Remove it.
673 */
674 if (name[0] == '.')
675 name++;
676
677 if (!strcmp(name, "_text") ||
678 !strcmp(name, "_etext") ||
679 !strcmp(name, "_sinittext") ||
680 !strncmp("init_module", name, 11) ||
681 !strncmp("cleanup_module", name, 14) ||
682 strstr(name, "_text_start") ||
683 strstr(name, "_text_end"))
684 return 1;
685
686 for (i = 0; skip_symbols[i]; i++) {
687 if (!strcmp(skip_symbols[i], name)) {
688 sym->ignore = true;
689 break;
690 }
691 }
692
693 return 0;
694}
695
696static void perf_event__process_sample(struct perf_tool *tool,
697 const union perf_event *event,
698 struct perf_evsel *evsel,
699 struct perf_sample *sample,
700 struct machine *machine)
701{
702 struct perf_top *top = container_of(tool, struct perf_top, tool);
703 struct symbol *parent = NULL;
704 u64 ip = event->ip.ip;
705 struct addr_location al;
706 int err;
707
708 if (!machine && perf_guest) {
709 pr_err("Can't find guest [%d]'s kernel information\n",
710 event->ip.pid);
711 return;
712 }
713
714 if (!machine) {
715 pr_err("%u unprocessable samples recorded.",
716 top->session->hists.stats.nr_unprocessable_samples++);
717 return;
718 }
719
720 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
721 top->exact_samples++;
722
723 if (perf_event__preprocess_sample(event, machine, &al, sample,
724 symbol_filter) < 0 ||
725 al.filtered)
726 return;
727
728 if (!top->kptr_restrict_warned &&
729 symbol_conf.kptr_restrict &&
730 al.cpumode == PERF_RECORD_MISC_KERNEL) {
731 ui__warning(
732"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
733"Check /proc/sys/kernel/kptr_restrict.\n\n"
734"Kernel%s samples will not be resolved.\n",
735 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
736 " modules" : "");
737 if (use_browser <= 0)
738 sleep(5);
739 top->kptr_restrict_warned = true;
740 }
741
742 if (al.sym == NULL) {
743 const char *msg = "Kernel samples will not be resolved.\n";
744 /*
745 * As we do lazy loading of symtabs we only will know if the
746 * specified vmlinux file is invalid when we actually have a
747 * hit in kernel space and then try to load it. So if we get
748 * here and there are _no_ symbols in the DSO backing the
749 * kernel map, bail out.
750 *
751 * We may never get here, for instance, if we use -K/
752 * --hide-kernel-symbols, even if the user specifies an
753 * invalid --vmlinux ;-)
754 */
755 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
756 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
757 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
758 if (symbol_conf.vmlinux_name) {
759 ui__warning("The %s file can't be used.\n%s",
760 symbol_conf.vmlinux_name, msg);
761 } else {
762 ui__warning("A vmlinux file was not found.\n%s",
763 msg);
764 }
765
766 if (use_browser <= 0)
767 sleep(5);
768 top->vmlinux_warned = true;
769 }
770 }
771
772 if (al.sym == NULL || !al.sym->ignore) {
773 struct hist_entry *he;
774
775 if ((sort__has_parent || symbol_conf.use_callchain) &&
776 sample->callchain) {
777 err = machine__resolve_callchain(machine, evsel, al.thread,
778 sample->callchain, &parent);
779 if (err)
780 return;
781 }
782
783 he = perf_evsel__add_hist_entry(evsel, &al, sample);
784 if (he == NULL) {
785 pr_err("Problem incrementing symbol period, skipping event\n");
786 return;
787 }
788
789 if (symbol_conf.use_callchain) {
790 err = callchain_append(he->callchain, &callchain_cursor,
791 sample->period);
792 if (err)
793 return;
794 }
795
796 if (top->sort_has_symbols)
797 perf_top__record_precise_ip(top, he, evsel->idx, ip);
798 }
799
800 return;
801}
802
803static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
804{
805 struct perf_sample sample;
806 struct perf_evsel *evsel;
807 struct perf_session *session = top->session;
808 union perf_event *event;
809 struct machine *machine;
810 u8 origin;
811 int ret;
812
813 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
814 ret = perf_session__parse_sample(session, event, &sample);
815 if (ret) {
816 pr_err("Can't parse sample, err = %d\n", ret);
817 continue;
818 }
819
820 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
821 assert(evsel != NULL);
822
823 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
824
825 if (event->header.type == PERF_RECORD_SAMPLE)
826 ++top->samples;
827
828 switch (origin) {
829 case PERF_RECORD_MISC_USER:
830 ++top->us_samples;
831 if (top->hide_user_symbols)
832 continue;
833 machine = perf_session__find_host_machine(session);
834 break;
835 case PERF_RECORD_MISC_KERNEL:
836 ++top->kernel_samples;
837 if (top->hide_kernel_symbols)
838 continue;
839 machine = perf_session__find_host_machine(session);
840 break;
841 case PERF_RECORD_MISC_GUEST_KERNEL:
842 ++top->guest_kernel_samples;
843 machine = perf_session__find_machine(session, event->ip.pid);
844 break;
845 case PERF_RECORD_MISC_GUEST_USER:
846 ++top->guest_us_samples;
847 /*
848 * TODO: we don't process guest user from host side
849 * except simple counting.
850 */
851 /* Fall thru */
852 default:
853 continue;
854 }
855
856
857 if (event->header.type == PERF_RECORD_SAMPLE) {
858 perf_event__process_sample(&top->tool, event, evsel,
859 &sample, machine);
860 } else if (event->header.type < PERF_RECORD_MAX) {
861 hists__inc_nr_events(&evsel->hists, event->header.type);
862 perf_event__process(&top->tool, event, &sample, machine);
863 } else
864 ++session->hists.stats.nr_unknown_events;
865 }
866}
867
868static void perf_top__mmap_read(struct perf_top *top)
869{
870 int i;
871
872 for (i = 0; i < top->evlist->nr_mmaps; i++)
873 perf_top__mmap_read_idx(top, i);
874}
875
876static void perf_top__start_counters(struct perf_top *top)
877{
878 struct perf_evsel *counter, *first;
879 struct perf_evlist *evlist = top->evlist;
880
881 first = list_entry(evlist->entries.next, struct perf_evsel, node);
882
883 list_for_each_entry(counter, &evlist->entries, node) {
884 struct perf_event_attr *attr = &counter->attr;
885 struct xyarray *group_fd = NULL;
886
887 if (top->group && counter != first)
888 group_fd = first->fd;
889
890 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
891
892 if (top->freq) {
893 attr->sample_type |= PERF_SAMPLE_PERIOD;
894 attr->freq = 1;
895 attr->sample_freq = top->freq;
896 }
897
898 if (evlist->nr_entries > 1) {
899 attr->sample_type |= PERF_SAMPLE_ID;
900 attr->read_format |= PERF_FORMAT_ID;
901 }
902
903 if (perf_target__has_cpu(&top->target))
904 attr->sample_type |= PERF_SAMPLE_CPU;
905
906 if (symbol_conf.use_callchain)
907 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
908
909 attr->mmap = 1;
910 attr->comm = 1;
911 attr->inherit = top->inherit;
912fallback_missing_features:
913 if (top->exclude_guest_missing)
914 attr->exclude_guest = attr->exclude_host = 0;
915retry_sample_id:
916 attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
917try_again:
918 if (perf_evsel__open(counter, top->evlist->cpus,
919 top->evlist->threads, top->group,
920 group_fd) < 0) {
921 int err = errno;
922
923 if (err == EPERM || err == EACCES) {
924 ui__error_paranoid();
925 goto out_err;
926 } else if (err == EINVAL) {
927 if (!top->exclude_guest_missing &&
928 (attr->exclude_guest || attr->exclude_host)) {
929 pr_debug("Old kernel, cannot exclude "
930 "guest or host samples.\n");
931 top->exclude_guest_missing = true;
932 goto fallback_missing_features;
933 } else if (!top->sample_id_all_missing) {
934 /*
935 * Old kernel, no attr->sample_id_type_all field
936 */
937 top->sample_id_all_missing = true;
938 goto retry_sample_id;
939 }
940 }
941 /*
942 * If it's cycles then fall back to hrtimer
943 * based cpu-clock-tick sw counter, which
944 * is always available even if no PMU support:
945 */
946 if (attr->type == PERF_TYPE_HARDWARE &&
947 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
948 if (verbose)
949 ui__warning("Cycles event not supported,\n"
950 "trying to fall back to cpu-clock-ticks\n");
951
952 attr->type = PERF_TYPE_SOFTWARE;
953 attr->config = PERF_COUNT_SW_CPU_CLOCK;
954 if (counter->name) {
955 free(counter->name);
956 counter->name = NULL;
957 }
958 goto try_again;
959 }
960
961 if (err == ENOENT) {
962 ui__error("The %s event is not supported.\n",
963 event_name(counter));
964 goto out_err;
965 } else if (err == EMFILE) {
966 ui__error("Too many events are opened.\n"
967 "Try again after reducing the number of events\n");
968 goto out_err;
969 }
970
971 ui__error("The sys_perf_event_open() syscall "
972 "returned with %d (%s). /bin/dmesg "
973 "may provide additional information.\n"
974 "No CONFIG_PERF_EVENTS=y kernel support "
975 "configured?\n", err, strerror(err));
976 goto out_err;
977 }
978 }
979
980 if (perf_evlist__mmap(evlist, top->mmap_pages, false) < 0) {
981 ui__error("Failed to mmap with %d (%s)\n",
982 errno, strerror(errno));
983 goto out_err;
984 }
985
986 return;
987
988out_err:
989 exit_browser(0);
990 exit(0);
991}
992
993static int perf_top__setup_sample_type(struct perf_top *top)
994{
995 if (!top->sort_has_symbols) {
996 if (symbol_conf.use_callchain) {
997 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
998 return -EINVAL;
999 }
1000 } else if (!top->dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
1001 if (callchain_register_param(&callchain_param) < 0) {
1002 ui__error("Can't register callchain params.\n");
1003 return -EINVAL;
1004 }
1005 }
1006
1007 return 0;
1008}
1009
1010static int __cmd_top(struct perf_top *top)
1011{
1012 pthread_t thread;
1013 int ret;
1014 /*
1015 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1016 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1017 */
1018 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1019 if (top->session == NULL)
1020 return -ENOMEM;
1021
1022 ret = perf_top__setup_sample_type(top);
1023 if (ret)
1024 goto out_delete;
1025
1026 if (perf_target__has_task(&top->target))
1027 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
1028 perf_event__process,
1029 &top->session->host_machine);
1030 else
1031 perf_event__synthesize_threads(&top->tool, perf_event__process,
1032 &top->session->host_machine);
1033 perf_top__start_counters(top);
1034 top->session->evlist = top->evlist;
1035 perf_session__update_sample_type(top->session);
1036
1037 /* Wait for a minimal set of events before starting the snapshot */
1038 poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1039
1040 perf_top__mmap_read(top);
1041
1042 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1043 display_thread), top)) {
1044 ui__error("Could not create display thread.\n");
1045 exit(-1);
1046 }
1047
1048 if (top->realtime_prio) {
1049 struct sched_param param;
1050
1051 param.sched_priority = top->realtime_prio;
1052 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1053 ui__error("Could not set realtime priority.\n");
1054 exit(-1);
1055 }
1056 }
1057
1058 while (1) {
1059 u64 hits = top->samples;
1060
1061 perf_top__mmap_read(top);
1062
1063 if (hits == top->samples)
1064 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1065 }
1066
1067out_delete:
1068 perf_session__delete(top->session);
1069 top->session = NULL;
1070
1071 return 0;
1072}
1073
1074static int
1075parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1076{
1077 struct perf_top *top = (struct perf_top *)opt->value;
1078 char *tok, *tok2;
1079 char *endptr;
1080
1081 /*
1082 * --no-call-graph
1083 */
1084 if (unset) {
1085 top->dont_use_callchains = true;
1086 return 0;
1087 }
1088
1089 symbol_conf.use_callchain = true;
1090
1091 if (!arg)
1092 return 0;
1093
1094 tok = strtok((char *)arg, ",");
1095 if (!tok)
1096 return -1;
1097
1098 /* get the output mode */
1099 if (!strncmp(tok, "graph", strlen(arg)))
1100 callchain_param.mode = CHAIN_GRAPH_ABS;
1101
1102 else if (!strncmp(tok, "flat", strlen(arg)))
1103 callchain_param.mode = CHAIN_FLAT;
1104
1105 else if (!strncmp(tok, "fractal", strlen(arg)))
1106 callchain_param.mode = CHAIN_GRAPH_REL;
1107
1108 else if (!strncmp(tok, "none", strlen(arg))) {
1109 callchain_param.mode = CHAIN_NONE;
1110 symbol_conf.use_callchain = false;
1111
1112 return 0;
1113 } else
1114 return -1;
1115
1116 /* get the min percentage */
1117 tok = strtok(NULL, ",");
1118 if (!tok)
1119 goto setup;
1120
1121 callchain_param.min_percent = strtod(tok, &endptr);
1122 if (tok == endptr)
1123 return -1;
1124
1125 /* get the print limit */
1126 tok2 = strtok(NULL, ",");
1127 if (!tok2)
1128 goto setup;
1129
1130 if (tok2[0] != 'c') {
1131 callchain_param.print_limit = strtod(tok2, &endptr);
1132 tok2 = strtok(NULL, ",");
1133 if (!tok2)
1134 goto setup;
1135 }
1136
1137 /* get the call chain order */
1138 if (!strcmp(tok2, "caller"))
1139 callchain_param.order = ORDER_CALLER;
1140 else if (!strcmp(tok2, "callee"))
1141 callchain_param.order = ORDER_CALLEE;
1142 else
1143 return -1;
1144setup:
1145 if (callchain_register_param(&callchain_param) < 0) {
1146 fprintf(stderr, "Can't register callchain params\n");
1147 return -1;
1148 }
1149 return 0;
1150}
1151
1152static const char * const top_usage[] = {
1153 "perf top [<options>]",
1154 NULL
1155};
1156
1157int cmd_top(int argc, const char **argv, const char *prefix __used)
1158{
1159 struct perf_evsel *pos;
1160 int status;
1161 char errbuf[BUFSIZ];
1162 struct perf_top top = {
1163 .count_filter = 5,
1164 .delay_secs = 2,
1165 .freq = 4000, /* 4 KHz */
1166 .mmap_pages = 128,
1167 .sym_pcnt_filter = 5,
1168 .target = {
1169 .uses_mmap = true,
1170 },
1171 };
1172 char callchain_default_opt[] = "fractal,0.5,callee";
1173 const struct option options[] = {
1174 OPT_CALLBACK('e', "event", &top.evlist, "event",
1175 "event selector. use 'perf list' to list available events",
1176 parse_events_option),
1177 OPT_INTEGER('c', "count", &top.default_interval,
1178 "event period to sample"),
1179 OPT_STRING('p', "pid", &top.target.pid, "pid",
1180 "profile events on existing process id"),
1181 OPT_STRING('t', "tid", &top.target.tid, "tid",
1182 "profile events on existing thread id"),
1183 OPT_BOOLEAN('a', "all-cpus", &top.target.system_wide,
1184 "system-wide collection from all CPUs"),
1185 OPT_STRING('C', "cpu", &top.target.cpu_list, "cpu",
1186 "list of cpus to monitor"),
1187 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1188 "file", "vmlinux pathname"),
1189 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1190 "hide kernel symbols"),
1191 OPT_UINTEGER('m', "mmap-pages", &top.mmap_pages, "number of mmap data pages"),
1192 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1193 "collect data with this RT SCHED_FIFO priority"),
1194 OPT_INTEGER('d', "delay", &top.delay_secs,
1195 "number of seconds to delay between refreshes"),
1196 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1197 "dump the symbol table used for profiling"),
1198 OPT_INTEGER('f', "count-filter", &top.count_filter,
1199 "only display functions with more events than this"),
1200 OPT_BOOLEAN('g', "group", &top.group,
1201 "put the counters into a counter group"),
1202 OPT_BOOLEAN('i', "inherit", &top.inherit,
1203 "child tasks inherit counters"),
1204 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1205 "symbol to annotate"),
1206 OPT_BOOLEAN('z', "zero", &top.zero,
1207 "zero history across updates"),
1208 OPT_INTEGER('F', "freq", &top.freq,
1209 "profile at this frequency"),
1210 OPT_INTEGER('E', "entries", &top.print_entries,
1211 "display this many functions"),
1212 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1213 "hide user symbols"),
1214 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1215 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1216 OPT_INCR('v', "verbose", &verbose,
1217 "be more verbose (show counter open errors, etc)"),
1218 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1219 "sort by key(s): pid, comm, dso, symbol, parent"),
1220 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1221 "Show a column with the number of samples"),
1222 OPT_CALLBACK_DEFAULT('G', "call-graph", &top, "output_type,min_percent, call_order",
1223 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1224 "Default: fractal,0.5,callee", &parse_callchain_opt,
1225 callchain_default_opt),
1226 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1227 "Show a column with the sum of periods"),
1228 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1229 "only consider symbols in these dsos"),
1230 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1231 "only consider symbols in these comms"),
1232 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1233 "only consider these symbols"),
1234 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1235 "Interleave source code with assembly code (default)"),
1236 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1237 "Display raw encoding of assembly instructions (default)"),
1238 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1239 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1240 OPT_STRING('u', "uid", &top.target.uid_str, "user", "user to profile"),
1241 OPT_END()
1242 };
1243
1244 top.evlist = perf_evlist__new(NULL, NULL);
1245 if (top.evlist == NULL)
1246 return -ENOMEM;
1247
1248 symbol_conf.exclude_other = false;
1249
1250 argc = parse_options(argc, argv, options, top_usage, 0);
1251 if (argc)
1252 usage_with_options(top_usage, options);
1253
1254 if (sort_order == default_sort_order)
1255 sort_order = "dso,symbol";
1256
1257 setup_sorting(top_usage, options);
1258
1259 if (top.use_stdio)
1260 use_browser = 0;
1261 else if (top.use_tui)
1262 use_browser = 1;
1263
1264 setup_browser(false);
1265
1266 status = perf_target__validate(&top.target);
1267 if (status) {
1268 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1269 ui__warning("%s", errbuf);
1270 }
1271
1272 status = perf_target__parse_uid(&top.target);
1273 if (status) {
1274 int saved_errno = errno;
1275
1276 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1277 ui__error("%s", errbuf);
1278
1279 status = -saved_errno;
1280 goto out_delete_evlist;
1281 }
1282
1283 if (perf_target__none(&top.target))
1284 top.target.system_wide = true;
1285
1286 if (perf_evlist__create_maps(top.evlist, &top.target) < 0)
1287 usage_with_options(top_usage, options);
1288
1289 if (!top.evlist->nr_entries &&
1290 perf_evlist__add_default(top.evlist) < 0) {
1291 ui__error("Not enough memory for event selector list\n");
1292 return -ENOMEM;
1293 }
1294
1295 symbol_conf.nr_events = top.evlist->nr_entries;
1296
1297 if (top.delay_secs < 1)
1298 top.delay_secs = 1;
1299
1300 /*
1301 * User specified count overrides default frequency.
1302 */
1303 if (top.default_interval)
1304 top.freq = 0;
1305 else if (top.freq) {
1306 top.default_interval = top.freq;
1307 } else {
1308 ui__error("frequency and count are zero, aborting\n");
1309 exit(EXIT_FAILURE);
1310 }
1311
1312 list_for_each_entry(pos, &top.evlist->entries, node) {
1313 /*
1314 * Fill in the ones not specifically initialized via -c:
1315 */
1316 if (!pos->attr.sample_period)
1317 pos->attr.sample_period = top.default_interval;
1318 }
1319
1320 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1321
1322 symbol_conf.priv_size = sizeof(struct annotation);
1323
1324 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1325 if (symbol__init() < 0)
1326 return -1;
1327
1328 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1329 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1330 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1331
1332 /*
1333 * Avoid annotation data structures overhead when symbols aren't on the
1334 * sort list.
1335 */
1336 top.sort_has_symbols = sort_sym.list.next != NULL;
1337
1338 get_term_dimensions(&top.winsize);
1339 if (top.print_entries == 0) {
1340 struct sigaction act = {
1341 .sa_sigaction = perf_top__sig_winch,
1342 .sa_flags = SA_SIGINFO,
1343 };
1344 perf_top__update_print_entries(&top);
1345 sigaction(SIGWINCH, &act, NULL);
1346 }
1347
1348 status = __cmd_top(&top);
1349
1350out_delete_evlist:
1351 perf_evlist__delete(top.evlist);
1352
1353 return status;
1354}
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * builtin-top.c
4 *
5 * Builtin top command: Display a continuously updated profile of
6 * any workload, CPU or specific PID.
7 *
8 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
9 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
10 *
11 * Improvements and fixes by:
12 *
13 * Arjan van de Ven <arjan@linux.intel.com>
14 * Yanmin Zhang <yanmin.zhang@intel.com>
15 * Wu Fengguang <fengguang.wu@intel.com>
16 * Mike Galbraith <efault@gmx.de>
17 * Paul Mackerras <paulus@samba.org>
18 */
19#include "builtin.h"
20
21#include "perf.h"
22
23#include "util/annotate.h"
24#include "util/bpf-event.h"
25#include "util/cgroup.h"
26#include "util/config.h"
27#include "util/color.h"
28#include "util/dso.h"
29#include "util/evlist.h"
30#include "util/evsel.h"
31#include "util/evsel_config.h"
32#include "util/event.h"
33#include "util/machine.h"
34#include "util/map.h"
35#include "util/mmap.h"
36#include "util/session.h"
37#include "util/thread.h"
38#include "util/symbol.h"
39#include "util/synthetic-events.h"
40#include "util/top.h"
41#include "util/util.h"
42#include <linux/rbtree.h>
43#include <subcmd/parse-options.h>
44#include "util/parse-events.h"
45#include "util/callchain.h"
46#include "util/cpumap.h"
47#include "util/sort.h"
48#include "util/string2.h"
49#include "util/term.h"
50#include "util/intlist.h"
51#include "util/parse-branch-options.h"
52#include "arch/common.h"
53#include "ui/ui.h"
54
55#include "util/debug.h"
56#include "util/ordered-events.h"
57#include "util/pfm.h"
58
59#include <assert.h>
60#include <elf.h>
61#include <fcntl.h>
62
63#include <stdio.h>
64#include <termios.h>
65#include <unistd.h>
66#include <inttypes.h>
67
68#include <errno.h>
69#include <time.h>
70#include <sched.h>
71#include <signal.h>
72
73#include <sys/syscall.h>
74#include <sys/ioctl.h>
75#include <poll.h>
76#include <sys/prctl.h>
77#include <sys/wait.h>
78#include <sys/uio.h>
79#include <sys/utsname.h>
80#include <sys/mman.h>
81
82#include <linux/stringify.h>
83#include <linux/time64.h>
84#include <linux/types.h>
85#include <linux/err.h>
86
87#include <linux/ctype.h>
88#include <perf/mmap.h>
89
90static volatile sig_atomic_t done;
91static volatile sig_atomic_t resize;
92
93#define HEADER_LINE_NR 5
94
95static void perf_top__update_print_entries(struct perf_top *top)
96{
97 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
98}
99
100static void winch_sig(int sig __maybe_unused)
101{
102 resize = 1;
103}
104
105static void perf_top__resize(struct perf_top *top)
106{
107 get_term_dimensions(&top->winsize);
108 perf_top__update_print_entries(top);
109}
110
111static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
112{
113 struct evsel *evsel;
114 struct symbol *sym;
115 struct annotation *notes;
116 struct map *map;
117 int err = -1;
118
119 if (!he || !he->ms.sym)
120 return -1;
121
122 evsel = hists_to_evsel(he->hists);
123
124 sym = he->ms.sym;
125 map = he->ms.map;
126
127 /*
128 * We can't annotate with just /proc/kallsyms
129 */
130 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
131 !dso__is_kcore(map->dso)) {
132 pr_err("Can't annotate %s: No vmlinux file was found in the "
133 "path\n", sym->name);
134 sleep(1);
135 return -1;
136 }
137
138 notes = symbol__annotation(sym);
139 mutex_lock(¬es->lock);
140
141 if (!symbol__hists(sym, top->evlist->core.nr_entries)) {
142 mutex_unlock(¬es->lock);
143 pr_err("Not enough memory for annotating '%s' symbol!\n",
144 sym->name);
145 sleep(1);
146 return err;
147 }
148
149 err = symbol__annotate(&he->ms, evsel, &top->annotation_opts, NULL);
150 if (err == 0) {
151 top->sym_filter_entry = he;
152 } else {
153 char msg[BUFSIZ];
154 symbol__strerror_disassemble(&he->ms, err, msg, sizeof(msg));
155 pr_err("Couldn't annotate %s: %s\n", sym->name, msg);
156 }
157
158 mutex_unlock(¬es->lock);
159 return err;
160}
161
162static void __zero_source_counters(struct hist_entry *he)
163{
164 struct symbol *sym = he->ms.sym;
165 symbol__annotate_zero_histograms(sym);
166}
167
168static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
169{
170 struct utsname uts;
171 int err = uname(&uts);
172
173 ui__warning("Out of bounds address found:\n\n"
174 "Addr: %" PRIx64 "\n"
175 "DSO: %s %c\n"
176 "Map: %" PRIx64 "-%" PRIx64 "\n"
177 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
178 "Arch: %s\n"
179 "Kernel: %s\n"
180 "Tools: %s\n\n"
181 "Not all samples will be on the annotation output.\n\n"
182 "Please report to linux-kernel@vger.kernel.org\n",
183 ip, map->dso->long_name, dso__symtab_origin(map->dso),
184 map->start, map->end, sym->start, sym->end,
185 sym->binding == STB_GLOBAL ? 'g' :
186 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
187 err ? "[unknown]" : uts.machine,
188 err ? "[unknown]" : uts.release, perf_version_string);
189 if (use_browser <= 0)
190 sleep(5);
191
192 map->erange_warned = true;
193}
194
195static void perf_top__record_precise_ip(struct perf_top *top,
196 struct hist_entry *he,
197 struct perf_sample *sample,
198 struct evsel *evsel, u64 ip)
199 EXCLUSIVE_LOCKS_REQUIRED(he->hists->lock)
200{
201 struct annotation *notes;
202 struct symbol *sym = he->ms.sym;
203 int err = 0;
204
205 if (sym == NULL || (use_browser == 0 &&
206 (top->sym_filter_entry == NULL ||
207 top->sym_filter_entry->ms.sym != sym)))
208 return;
209
210 notes = symbol__annotation(sym);
211
212 if (!mutex_trylock(¬es->lock))
213 return;
214
215 err = hist_entry__inc_addr_samples(he, sample, evsel, ip);
216
217 mutex_unlock(¬es->lock);
218
219 if (unlikely(err)) {
220 /*
221 * This function is now called with he->hists->lock held.
222 * Release it before going to sleep.
223 */
224 mutex_unlock(&he->hists->lock);
225
226 if (err == -ERANGE && !he->ms.map->erange_warned)
227 ui__warn_map_erange(he->ms.map, sym, ip);
228 else if (err == -ENOMEM) {
229 pr_err("Not enough memory for annotating '%s' symbol!\n",
230 sym->name);
231 sleep(1);
232 }
233
234 mutex_lock(&he->hists->lock);
235 }
236}
237
238static void perf_top__show_details(struct perf_top *top)
239{
240 struct hist_entry *he = top->sym_filter_entry;
241 struct evsel *evsel;
242 struct annotation *notes;
243 struct symbol *symbol;
244 int more;
245
246 if (!he)
247 return;
248
249 evsel = hists_to_evsel(he->hists);
250
251 symbol = he->ms.sym;
252 notes = symbol__annotation(symbol);
253
254 mutex_lock(¬es->lock);
255
256 symbol__calc_percent(symbol, evsel);
257
258 if (notes->src == NULL)
259 goto out_unlock;
260
261 printf("Showing %s for %s\n", evsel__name(top->sym_evsel), symbol->name);
262 printf(" Events Pcnt (>=%d%%)\n", top->annotation_opts.min_pcnt);
263
264 more = symbol__annotate_printf(&he->ms, top->sym_evsel, &top->annotation_opts);
265
266 if (top->evlist->enabled) {
267 if (top->zero)
268 symbol__annotate_zero_histogram(symbol, top->sym_evsel->core.idx);
269 else
270 symbol__annotate_decay_histogram(symbol, top->sym_evsel->core.idx);
271 }
272 if (more != 0)
273 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
274out_unlock:
275 mutex_unlock(¬es->lock);
276}
277
278static void perf_top__resort_hists(struct perf_top *t)
279{
280 struct evlist *evlist = t->evlist;
281 struct evsel *pos;
282
283 evlist__for_each_entry(evlist, pos) {
284 struct hists *hists = evsel__hists(pos);
285
286 /*
287 * unlink existing entries so that they can be linked
288 * in a correct order in hists__match() below.
289 */
290 hists__unlink(hists);
291
292 if (evlist->enabled) {
293 if (t->zero) {
294 hists__delete_entries(hists);
295 } else {
296 hists__decay_entries(hists, t->hide_user_symbols,
297 t->hide_kernel_symbols);
298 }
299 }
300
301 hists__collapse_resort(hists, NULL);
302
303 /* Non-group events are considered as leader */
304 if (symbol_conf.event_group && !evsel__is_group_leader(pos)) {
305 struct hists *leader_hists = evsel__hists(evsel__leader(pos));
306
307 hists__match(leader_hists, hists);
308 hists__link(leader_hists, hists);
309 }
310 }
311
312 evlist__for_each_entry(evlist, pos) {
313 evsel__output_resort(pos, NULL);
314 }
315}
316
317static void perf_top__print_sym_table(struct perf_top *top)
318{
319 char bf[160];
320 int printed = 0;
321 const int win_width = top->winsize.ws_col - 1;
322 struct evsel *evsel = top->sym_evsel;
323 struct hists *hists = evsel__hists(evsel);
324
325 puts(CONSOLE_CLEAR);
326
327 perf_top__header_snprintf(top, bf, sizeof(bf));
328 printf("%s\n", bf);
329
330 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
331
332 if (!top->record_opts.overwrite &&
333 (top->evlist->stats.nr_lost_warned !=
334 top->evlist->stats.nr_events[PERF_RECORD_LOST])) {
335 top->evlist->stats.nr_lost_warned =
336 top->evlist->stats.nr_events[PERF_RECORD_LOST];
337 color_fprintf(stdout, PERF_COLOR_RED,
338 "WARNING: LOST %d chunks, Check IO/CPU overload",
339 top->evlist->stats.nr_lost_warned);
340 ++printed;
341 }
342
343 if (top->sym_filter_entry) {
344 perf_top__show_details(top);
345 return;
346 }
347
348 perf_top__resort_hists(top);
349
350 hists__output_recalc_col_len(hists, top->print_entries - printed);
351 putchar('\n');
352 hists__fprintf(hists, false, top->print_entries - printed, win_width,
353 top->min_percent, stdout, !symbol_conf.use_callchain);
354}
355
356static void prompt_integer(int *target, const char *msg)
357{
358 char *buf = malloc(0), *p;
359 size_t dummy = 0;
360 int tmp;
361
362 fprintf(stdout, "\n%s: ", msg);
363 if (getline(&buf, &dummy, stdin) < 0)
364 return;
365
366 p = strchr(buf, '\n');
367 if (p)
368 *p = 0;
369
370 p = buf;
371 while(*p) {
372 if (!isdigit(*p))
373 goto out_free;
374 p++;
375 }
376 tmp = strtoul(buf, NULL, 10);
377 *target = tmp;
378out_free:
379 free(buf);
380}
381
382static void prompt_percent(int *target, const char *msg)
383{
384 int tmp = 0;
385
386 prompt_integer(&tmp, msg);
387 if (tmp >= 0 && tmp <= 100)
388 *target = tmp;
389}
390
391static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
392{
393 char *buf = malloc(0), *p;
394 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
395 struct hists *hists = evsel__hists(top->sym_evsel);
396 struct rb_node *next;
397 size_t dummy = 0;
398
399 /* zero counters of active symbol */
400 if (syme) {
401 __zero_source_counters(syme);
402 top->sym_filter_entry = NULL;
403 }
404
405 fprintf(stdout, "\n%s: ", msg);
406 if (getline(&buf, &dummy, stdin) < 0)
407 goto out_free;
408
409 p = strchr(buf, '\n');
410 if (p)
411 *p = 0;
412
413 next = rb_first_cached(&hists->entries);
414 while (next) {
415 n = rb_entry(next, struct hist_entry, rb_node);
416 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
417 found = n;
418 break;
419 }
420 next = rb_next(&n->rb_node);
421 }
422
423 if (!found) {
424 fprintf(stderr, "Sorry, %s is not active.\n", buf);
425 sleep(1);
426 } else
427 perf_top__parse_source(top, found);
428
429out_free:
430 free(buf);
431}
432
433static void perf_top__print_mapped_keys(struct perf_top *top)
434{
435 char *name = NULL;
436
437 if (top->sym_filter_entry) {
438 struct symbol *sym = top->sym_filter_entry->ms.sym;
439 name = sym->name;
440 }
441
442 fprintf(stdout, "\nMapped keys:\n");
443 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
444 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
445
446 if (top->evlist->core.nr_entries > 1)
447 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", evsel__name(top->sym_evsel));
448
449 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
450
451 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->annotation_opts.min_pcnt);
452 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
453 fprintf(stdout, "\t[S] stop annotation.\n");
454
455 fprintf(stdout,
456 "\t[K] hide kernel symbols. \t(%s)\n",
457 top->hide_kernel_symbols ? "yes" : "no");
458 fprintf(stdout,
459 "\t[U] hide user symbols. \t(%s)\n",
460 top->hide_user_symbols ? "yes" : "no");
461 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
462 fprintf(stdout, "\t[qQ] quit.\n");
463}
464
465static int perf_top__key_mapped(struct perf_top *top, int c)
466{
467 switch (c) {
468 case 'd':
469 case 'e':
470 case 'f':
471 case 'z':
472 case 'q':
473 case 'Q':
474 case 'K':
475 case 'U':
476 case 'F':
477 case 's':
478 case 'S':
479 return 1;
480 case 'E':
481 return top->evlist->core.nr_entries > 1 ? 1 : 0;
482 default:
483 break;
484 }
485
486 return 0;
487}
488
489static bool perf_top__handle_keypress(struct perf_top *top, int c)
490{
491 bool ret = true;
492
493 if (!perf_top__key_mapped(top, c)) {
494 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
495 struct termios save;
496
497 perf_top__print_mapped_keys(top);
498 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
499 fflush(stdout);
500
501 set_term_quiet_input(&save);
502
503 poll(&stdin_poll, 1, -1);
504 c = getc(stdin);
505
506 tcsetattr(0, TCSAFLUSH, &save);
507 if (!perf_top__key_mapped(top, c))
508 return ret;
509 }
510
511 switch (c) {
512 case 'd':
513 prompt_integer(&top->delay_secs, "Enter display delay");
514 if (top->delay_secs < 1)
515 top->delay_secs = 1;
516 break;
517 case 'e':
518 prompt_integer(&top->print_entries, "Enter display entries (lines)");
519 if (top->print_entries == 0) {
520 perf_top__resize(top);
521 signal(SIGWINCH, winch_sig);
522 } else {
523 signal(SIGWINCH, SIG_DFL);
524 }
525 break;
526 case 'E':
527 if (top->evlist->core.nr_entries > 1) {
528 /* Select 0 as the default event: */
529 int counter = 0;
530
531 fprintf(stderr, "\nAvailable events:");
532
533 evlist__for_each_entry(top->evlist, top->sym_evsel)
534 fprintf(stderr, "\n\t%d %s", top->sym_evsel->core.idx, evsel__name(top->sym_evsel));
535
536 prompt_integer(&counter, "Enter details event counter");
537
538 if (counter >= top->evlist->core.nr_entries) {
539 top->sym_evsel = evlist__first(top->evlist);
540 fprintf(stderr, "Sorry, no such event, using %s.\n", evsel__name(top->sym_evsel));
541 sleep(1);
542 break;
543 }
544 evlist__for_each_entry(top->evlist, top->sym_evsel)
545 if (top->sym_evsel->core.idx == counter)
546 break;
547 } else
548 top->sym_evsel = evlist__first(top->evlist);
549 break;
550 case 'f':
551 prompt_integer(&top->count_filter, "Enter display event count filter");
552 break;
553 case 'F':
554 prompt_percent(&top->annotation_opts.min_pcnt,
555 "Enter details display event filter (percent)");
556 break;
557 case 'K':
558 top->hide_kernel_symbols = !top->hide_kernel_symbols;
559 break;
560 case 'q':
561 case 'Q':
562 printf("exiting.\n");
563 if (top->dump_symtab)
564 perf_session__fprintf_dsos(top->session, stderr);
565 ret = false;
566 break;
567 case 's':
568 perf_top__prompt_symbol(top, "Enter details symbol");
569 break;
570 case 'S':
571 if (!top->sym_filter_entry)
572 break;
573 else {
574 struct hist_entry *syme = top->sym_filter_entry;
575
576 top->sym_filter_entry = NULL;
577 __zero_source_counters(syme);
578 }
579 break;
580 case 'U':
581 top->hide_user_symbols = !top->hide_user_symbols;
582 break;
583 case 'z':
584 top->zero = !top->zero;
585 break;
586 default:
587 break;
588 }
589
590 return ret;
591}
592
593static void perf_top__sort_new_samples(void *arg)
594{
595 struct perf_top *t = arg;
596
597 if (t->evlist->selected != NULL)
598 t->sym_evsel = t->evlist->selected;
599
600 perf_top__resort_hists(t);
601
602 if (t->lost || t->drop)
603 pr_warning("Too slow to read ring buffer (change period (-c/-F) or limit CPUs (-C)\n");
604}
605
606static void stop_top(void)
607{
608 session_done = 1;
609 done = 1;
610}
611
612static void *display_thread_tui(void *arg)
613{
614 struct evsel *pos;
615 struct perf_top *top = arg;
616 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
617 struct hist_browser_timer hbt = {
618 .timer = perf_top__sort_new_samples,
619 .arg = top,
620 .refresh = top->delay_secs,
621 };
622 int ret;
623
624 /* In order to read symbols from other namespaces perf to needs to call
625 * setns(2). This isn't permitted if the struct_fs has multiple users.
626 * unshare(2) the fs so that we may continue to setns into namespaces
627 * that we're observing.
628 */
629 unshare(CLONE_FS);
630
631 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
632
633repeat:
634 perf_top__sort_new_samples(top);
635
636 /*
637 * Initialize the uid_filter_str, in the future the TUI will allow
638 * Zooming in/out UIDs. For now just use whatever the user passed
639 * via --uid.
640 */
641 evlist__for_each_entry(top->evlist, pos) {
642 struct hists *hists = evsel__hists(pos);
643 hists->uid_filter_str = top->record_opts.target.uid_str;
644 }
645
646 ret = evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
647 &top->session->header.env, !top->record_opts.overwrite,
648 &top->annotation_opts);
649 if (ret == K_RELOAD) {
650 top->zero = true;
651 goto repeat;
652 } else
653 stop_top();
654
655 return NULL;
656}
657
658static void display_sig(int sig __maybe_unused)
659{
660 stop_top();
661}
662
663static void display_setup_sig(void)
664{
665 signal(SIGSEGV, sighandler_dump_stack);
666 signal(SIGFPE, sighandler_dump_stack);
667 signal(SIGINT, display_sig);
668 signal(SIGQUIT, display_sig);
669 signal(SIGTERM, display_sig);
670}
671
672static void *display_thread(void *arg)
673{
674 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
675 struct termios save;
676 struct perf_top *top = arg;
677 int delay_msecs, c;
678
679 /* In order to read symbols from other namespaces perf to needs to call
680 * setns(2). This isn't permitted if the struct_fs has multiple users.
681 * unshare(2) the fs so that we may continue to setns into namespaces
682 * that we're observing.
683 */
684 unshare(CLONE_FS);
685
686 prctl(PR_SET_NAME, "perf-top-UI", 0, 0, 0);
687
688 display_setup_sig();
689 pthread__unblock_sigwinch();
690repeat:
691 delay_msecs = top->delay_secs * MSEC_PER_SEC;
692 set_term_quiet_input(&save);
693 /* trash return*/
694 clearerr(stdin);
695 if (poll(&stdin_poll, 1, 0) > 0)
696 getc(stdin);
697
698 while (!done) {
699 perf_top__print_sym_table(top);
700 /*
701 * Either timeout expired or we got an EINTR due to SIGWINCH,
702 * refresh screen in both cases.
703 */
704 switch (poll(&stdin_poll, 1, delay_msecs)) {
705 case 0:
706 continue;
707 case -1:
708 if (errno == EINTR)
709 continue;
710 __fallthrough;
711 default:
712 c = getc(stdin);
713 tcsetattr(0, TCSAFLUSH, &save);
714
715 if (perf_top__handle_keypress(top, c))
716 goto repeat;
717 stop_top();
718 }
719 }
720
721 tcsetattr(0, TCSAFLUSH, &save);
722 return NULL;
723}
724
725static int hist_iter__top_callback(struct hist_entry_iter *iter,
726 struct addr_location *al, bool single,
727 void *arg)
728 EXCLUSIVE_LOCKS_REQUIRED(iter->he->hists->lock)
729{
730 struct perf_top *top = arg;
731 struct evsel *evsel = iter->evsel;
732
733 if (perf_hpp_list.sym && single)
734 perf_top__record_precise_ip(top, iter->he, iter->sample, evsel, al->addr);
735
736 hist__account_cycles(iter->sample->branch_stack, al, iter->sample,
737 !(top->record_opts.branch_stack & PERF_SAMPLE_BRANCH_ANY),
738 NULL);
739 return 0;
740}
741
742static void perf_event__process_sample(struct perf_tool *tool,
743 const union perf_event *event,
744 struct evsel *evsel,
745 struct perf_sample *sample,
746 struct machine *machine)
747{
748 struct perf_top *top = container_of(tool, struct perf_top, tool);
749 struct addr_location al;
750
751 if (!machine && perf_guest) {
752 static struct intlist *seen;
753
754 if (!seen)
755 seen = intlist__new(NULL);
756
757 if (!intlist__has_entry(seen, sample->pid)) {
758 pr_err("Can't find guest [%d]'s kernel information\n",
759 sample->pid);
760 intlist__add(seen, sample->pid);
761 }
762 return;
763 }
764
765 if (!machine) {
766 pr_err("%u unprocessable samples recorded.\r",
767 top->session->evlist->stats.nr_unprocessable_samples++);
768 return;
769 }
770
771 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
772 top->exact_samples++;
773
774 if (machine__resolve(machine, &al, sample) < 0)
775 return;
776
777 if (top->stitch_lbr)
778 al.thread->lbr_stitch_enable = true;
779
780 if (!machine->kptr_restrict_warned &&
781 symbol_conf.kptr_restrict &&
782 al.cpumode == PERF_RECORD_MISC_KERNEL) {
783 if (!evlist__exclude_kernel(top->session->evlist)) {
784 ui__warning(
785"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
786"Check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n"
787"Kernel%s samples will not be resolved.\n",
788 al.map && map__has_symbols(al.map) ?
789 " modules" : "");
790 if (use_browser <= 0)
791 sleep(5);
792 }
793 machine->kptr_restrict_warned = true;
794 }
795
796 if (al.sym == NULL && al.map != NULL) {
797 const char *msg = "Kernel samples will not be resolved.\n";
798 /*
799 * As we do lazy loading of symtabs we only will know if the
800 * specified vmlinux file is invalid when we actually have a
801 * hit in kernel space and then try to load it. So if we get
802 * here and there are _no_ symbols in the DSO backing the
803 * kernel map, bail out.
804 *
805 * We may never get here, for instance, if we use -K/
806 * --hide-kernel-symbols, even if the user specifies an
807 * invalid --vmlinux ;-)
808 */
809 if (!machine->kptr_restrict_warned && !top->vmlinux_warned &&
810 __map__is_kernel(al.map) && map__has_symbols(al.map)) {
811 if (symbol_conf.vmlinux_name) {
812 char serr[256];
813 dso__strerror_load(al.map->dso, serr, sizeof(serr));
814 ui__warning("The %s file can't be used: %s\n%s",
815 symbol_conf.vmlinux_name, serr, msg);
816 } else {
817 ui__warning("A vmlinux file was not found.\n%s",
818 msg);
819 }
820
821 if (use_browser <= 0)
822 sleep(5);
823 top->vmlinux_warned = true;
824 }
825 }
826
827 if (al.sym == NULL || !al.sym->idle) {
828 struct hists *hists = evsel__hists(evsel);
829 struct hist_entry_iter iter = {
830 .evsel = evsel,
831 .sample = sample,
832 .add_entry_cb = hist_iter__top_callback,
833 };
834
835 if (symbol_conf.cumulate_callchain)
836 iter.ops = &hist_iter_cumulative;
837 else
838 iter.ops = &hist_iter_normal;
839
840 mutex_lock(&hists->lock);
841
842 if (hist_entry_iter__add(&iter, &al, top->max_stack, top) < 0)
843 pr_err("Problem incrementing symbol period, skipping event\n");
844
845 mutex_unlock(&hists->lock);
846 }
847
848 addr_location__put(&al);
849}
850
851static void
852perf_top__process_lost(struct perf_top *top, union perf_event *event,
853 struct evsel *evsel)
854{
855 top->lost += event->lost.lost;
856 top->lost_total += event->lost.lost;
857 evsel->evlist->stats.total_lost += event->lost.lost;
858}
859
860static void
861perf_top__process_lost_samples(struct perf_top *top,
862 union perf_event *event,
863 struct evsel *evsel)
864{
865 top->lost += event->lost_samples.lost;
866 top->lost_total += event->lost_samples.lost;
867 evsel->evlist->stats.total_lost_samples += event->lost_samples.lost;
868}
869
870static u64 last_timestamp;
871
872static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
873{
874 struct record_opts *opts = &top->record_opts;
875 struct evlist *evlist = top->evlist;
876 struct mmap *md;
877 union perf_event *event;
878
879 md = opts->overwrite ? &evlist->overwrite_mmap[idx] : &evlist->mmap[idx];
880 if (perf_mmap__read_init(&md->core) < 0)
881 return;
882
883 while ((event = perf_mmap__read_event(&md->core)) != NULL) {
884 int ret;
885
886 ret = evlist__parse_sample_timestamp(evlist, event, &last_timestamp);
887 if (ret && ret != -1)
888 break;
889
890 ret = ordered_events__queue(top->qe.in, event, last_timestamp, 0, NULL);
891 if (ret)
892 break;
893
894 perf_mmap__consume(&md->core);
895
896 if (top->qe.rotate) {
897 mutex_lock(&top->qe.mutex);
898 top->qe.rotate = false;
899 cond_signal(&top->qe.cond);
900 mutex_unlock(&top->qe.mutex);
901 }
902 }
903
904 perf_mmap__read_done(&md->core);
905}
906
907static void perf_top__mmap_read(struct perf_top *top)
908{
909 bool overwrite = top->record_opts.overwrite;
910 struct evlist *evlist = top->evlist;
911 int i;
912
913 if (overwrite)
914 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_DATA_PENDING);
915
916 for (i = 0; i < top->evlist->core.nr_mmaps; i++)
917 perf_top__mmap_read_idx(top, i);
918
919 if (overwrite) {
920 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
921 evlist__toggle_bkw_mmap(evlist, BKW_MMAP_RUNNING);
922 }
923}
924
925/*
926 * Check per-event overwrite term.
927 * perf top should support consistent term for all events.
928 * - All events don't have per-event term
929 * E.g. "cpu/cpu-cycles/,cpu/instructions/"
930 * Nothing change, return 0.
931 * - All events have same per-event term
932 * E.g. "cpu/cpu-cycles,no-overwrite/,cpu/instructions,no-overwrite/
933 * Using the per-event setting to replace the opts->overwrite if
934 * they are different, then return 0.
935 * - Events have different per-event term
936 * E.g. "cpu/cpu-cycles,overwrite/,cpu/instructions,no-overwrite/"
937 * Return -1
938 * - Some of the event set per-event term, but some not.
939 * E.g. "cpu/cpu-cycles/,cpu/instructions,no-overwrite/"
940 * Return -1
941 */
942static int perf_top__overwrite_check(struct perf_top *top)
943{
944 struct record_opts *opts = &top->record_opts;
945 struct evlist *evlist = top->evlist;
946 struct evsel_config_term *term;
947 struct list_head *config_terms;
948 struct evsel *evsel;
949 int set, overwrite = -1;
950
951 evlist__for_each_entry(evlist, evsel) {
952 set = -1;
953 config_terms = &evsel->config_terms;
954 list_for_each_entry(term, config_terms, list) {
955 if (term->type == EVSEL__CONFIG_TERM_OVERWRITE)
956 set = term->val.overwrite ? 1 : 0;
957 }
958
959 /* no term for current and previous event (likely) */
960 if ((overwrite < 0) && (set < 0))
961 continue;
962
963 /* has term for both current and previous event, compare */
964 if ((overwrite >= 0) && (set >= 0) && (overwrite != set))
965 return -1;
966
967 /* no term for current event but has term for previous one */
968 if ((overwrite >= 0) && (set < 0))
969 return -1;
970
971 /* has term for current event */
972 if ((overwrite < 0) && (set >= 0)) {
973 /* if it's first event, set overwrite */
974 if (evsel == evlist__first(evlist))
975 overwrite = set;
976 else
977 return -1;
978 }
979 }
980
981 if ((overwrite >= 0) && (opts->overwrite != overwrite))
982 opts->overwrite = overwrite;
983
984 return 0;
985}
986
987static int perf_top_overwrite_fallback(struct perf_top *top,
988 struct evsel *evsel)
989{
990 struct record_opts *opts = &top->record_opts;
991 struct evlist *evlist = top->evlist;
992 struct evsel *counter;
993
994 if (!opts->overwrite)
995 return 0;
996
997 /* only fall back when first event fails */
998 if (evsel != evlist__first(evlist))
999 return 0;
1000
1001 evlist__for_each_entry(evlist, counter)
1002 counter->core.attr.write_backward = false;
1003 opts->overwrite = false;
1004 pr_debug2("fall back to non-overwrite mode\n");
1005 return 1;
1006}
1007
1008static int perf_top__start_counters(struct perf_top *top)
1009{
1010 char msg[BUFSIZ];
1011 struct evsel *counter;
1012 struct evlist *evlist = top->evlist;
1013 struct record_opts *opts = &top->record_opts;
1014
1015 if (perf_top__overwrite_check(top)) {
1016 ui__error("perf top only support consistent per-event "
1017 "overwrite setting for all events\n");
1018 goto out_err;
1019 }
1020
1021 evlist__config(evlist, opts, &callchain_param);
1022
1023 evlist__for_each_entry(evlist, counter) {
1024try_again:
1025 if (evsel__open(counter, top->evlist->core.user_requested_cpus,
1026 top->evlist->core.threads) < 0) {
1027
1028 /*
1029 * Specially handle overwrite fall back.
1030 * Because perf top is the only tool which has
1031 * overwrite mode by default, support
1032 * both overwrite and non-overwrite mode, and
1033 * require consistent mode for all events.
1034 *
1035 * May move it to generic code with more tools
1036 * have similar attribute.
1037 */
1038 if (perf_missing_features.write_backward &&
1039 perf_top_overwrite_fallback(top, counter))
1040 goto try_again;
1041
1042 if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
1043 if (verbose > 0)
1044 ui__warning("%s\n", msg);
1045 goto try_again;
1046 }
1047
1048 evsel__open_strerror(counter, &opts->target, errno, msg, sizeof(msg));
1049 ui__error("%s\n", msg);
1050 goto out_err;
1051 }
1052 }
1053
1054 if (evlist__mmap(evlist, opts->mmap_pages) < 0) {
1055 ui__error("Failed to mmap with %d (%s)\n",
1056 errno, str_error_r(errno, msg, sizeof(msg)));
1057 goto out_err;
1058 }
1059
1060 return 0;
1061
1062out_err:
1063 return -1;
1064}
1065
1066static int callchain_param__setup_sample_type(struct callchain_param *callchain)
1067{
1068 if (callchain->mode != CHAIN_NONE) {
1069 if (callchain_register_param(callchain) < 0) {
1070 ui__error("Can't register callchain params.\n");
1071 return -EINVAL;
1072 }
1073 }
1074
1075 return 0;
1076}
1077
1078static struct ordered_events *rotate_queues(struct perf_top *top)
1079{
1080 struct ordered_events *in = top->qe.in;
1081
1082 if (top->qe.in == &top->qe.data[1])
1083 top->qe.in = &top->qe.data[0];
1084 else
1085 top->qe.in = &top->qe.data[1];
1086
1087 return in;
1088}
1089
1090static void *process_thread(void *arg)
1091{
1092 struct perf_top *top = arg;
1093
1094 while (!done) {
1095 struct ordered_events *out, *in = top->qe.in;
1096
1097 if (!in->nr_events) {
1098 usleep(100);
1099 continue;
1100 }
1101
1102 out = rotate_queues(top);
1103
1104 mutex_lock(&top->qe.mutex);
1105 top->qe.rotate = true;
1106 cond_wait(&top->qe.cond, &top->qe.mutex);
1107 mutex_unlock(&top->qe.mutex);
1108
1109 if (ordered_events__flush(out, OE_FLUSH__TOP))
1110 pr_err("failed to process events\n");
1111 }
1112
1113 return NULL;
1114}
1115
1116/*
1117 * Allow only 'top->delay_secs' seconds behind samples.
1118 */
1119static int should_drop(struct ordered_event *qevent, struct perf_top *top)
1120{
1121 union perf_event *event = qevent->event;
1122 u64 delay_timestamp;
1123
1124 if (event->header.type != PERF_RECORD_SAMPLE)
1125 return false;
1126
1127 delay_timestamp = qevent->timestamp + top->delay_secs * NSEC_PER_SEC;
1128 return delay_timestamp < last_timestamp;
1129}
1130
1131static int deliver_event(struct ordered_events *qe,
1132 struct ordered_event *qevent)
1133{
1134 struct perf_top *top = qe->data;
1135 struct evlist *evlist = top->evlist;
1136 struct perf_session *session = top->session;
1137 union perf_event *event = qevent->event;
1138 struct perf_sample sample;
1139 struct evsel *evsel;
1140 struct machine *machine;
1141 int ret = -1;
1142
1143 if (should_drop(qevent, top)) {
1144 top->drop++;
1145 top->drop_total++;
1146 return 0;
1147 }
1148
1149 ret = evlist__parse_sample(evlist, event, &sample);
1150 if (ret) {
1151 pr_err("Can't parse sample, err = %d\n", ret);
1152 goto next_event;
1153 }
1154
1155 evsel = evlist__id2evsel(session->evlist, sample.id);
1156 assert(evsel != NULL);
1157
1158 if (event->header.type == PERF_RECORD_SAMPLE) {
1159 if (evswitch__discard(&top->evswitch, evsel))
1160 return 0;
1161 ++top->samples;
1162 }
1163
1164 switch (sample.cpumode) {
1165 case PERF_RECORD_MISC_USER:
1166 ++top->us_samples;
1167 if (top->hide_user_symbols)
1168 goto next_event;
1169 machine = &session->machines.host;
1170 break;
1171 case PERF_RECORD_MISC_KERNEL:
1172 ++top->kernel_samples;
1173 if (top->hide_kernel_symbols)
1174 goto next_event;
1175 machine = &session->machines.host;
1176 break;
1177 case PERF_RECORD_MISC_GUEST_KERNEL:
1178 ++top->guest_kernel_samples;
1179 machine = perf_session__find_machine(session,
1180 sample.pid);
1181 break;
1182 case PERF_RECORD_MISC_GUEST_USER:
1183 ++top->guest_us_samples;
1184 /*
1185 * TODO: we don't process guest user from host side
1186 * except simple counting.
1187 */
1188 goto next_event;
1189 default:
1190 if (event->header.type == PERF_RECORD_SAMPLE)
1191 goto next_event;
1192 machine = &session->machines.host;
1193 break;
1194 }
1195
1196 if (event->header.type == PERF_RECORD_SAMPLE) {
1197 perf_event__process_sample(&top->tool, event, evsel,
1198 &sample, machine);
1199 } else if (event->header.type == PERF_RECORD_LOST) {
1200 perf_top__process_lost(top, event, evsel);
1201 } else if (event->header.type == PERF_RECORD_LOST_SAMPLES) {
1202 perf_top__process_lost_samples(top, event, evsel);
1203 } else if (event->header.type < PERF_RECORD_MAX) {
1204 events_stats__inc(&session->evlist->stats, event->header.type);
1205 machine__process_event(machine, event, &sample);
1206 } else
1207 ++session->evlist->stats.nr_unknown_events;
1208
1209 ret = 0;
1210next_event:
1211 return ret;
1212}
1213
1214static void init_process_thread(struct perf_top *top)
1215{
1216 ordered_events__init(&top->qe.data[0], deliver_event, top);
1217 ordered_events__init(&top->qe.data[1], deliver_event, top);
1218 ordered_events__set_copy_on_queue(&top->qe.data[0], true);
1219 ordered_events__set_copy_on_queue(&top->qe.data[1], true);
1220 top->qe.in = &top->qe.data[0];
1221 mutex_init(&top->qe.mutex);
1222 cond_init(&top->qe.cond);
1223}
1224
1225static int __cmd_top(struct perf_top *top)
1226{
1227 struct record_opts *opts = &top->record_opts;
1228 pthread_t thread, thread_process;
1229 int ret;
1230
1231 if (!top->annotation_opts.objdump_path) {
1232 ret = perf_env__lookup_objdump(&top->session->header.env,
1233 &top->annotation_opts.objdump_path);
1234 if (ret)
1235 return ret;
1236 }
1237
1238 ret = callchain_param__setup_sample_type(&callchain_param);
1239 if (ret)
1240 return ret;
1241
1242 if (perf_session__register_idle_thread(top->session) < 0)
1243 return ret;
1244
1245 if (top->nr_threads_synthesize > 1)
1246 perf_set_multithreaded();
1247
1248 init_process_thread(top);
1249
1250 if (opts->record_namespaces)
1251 top->tool.namespace_events = true;
1252 if (opts->record_cgroup) {
1253#ifdef HAVE_FILE_HANDLE
1254 top->tool.cgroup_events = true;
1255#else
1256 pr_err("cgroup tracking is not supported.\n");
1257 return -1;
1258#endif
1259 }
1260
1261 ret = perf_event__synthesize_bpf_events(top->session, perf_event__process,
1262 &top->session->machines.host,
1263 &top->record_opts);
1264 if (ret < 0)
1265 pr_debug("Couldn't synthesize BPF events: Pre-existing BPF programs won't have symbols resolved.\n");
1266
1267 ret = perf_event__synthesize_cgroups(&top->tool, perf_event__process,
1268 &top->session->machines.host);
1269 if (ret < 0)
1270 pr_debug("Couldn't synthesize cgroup events.\n");
1271
1272 machine__synthesize_threads(&top->session->machines.host, &opts->target,
1273 top->evlist->core.threads, true, false,
1274 top->nr_threads_synthesize);
1275
1276 if (top->nr_threads_synthesize > 1)
1277 perf_set_singlethreaded();
1278
1279 if (perf_hpp_list.socket) {
1280 ret = perf_env__read_cpu_topology_map(&perf_env);
1281 if (ret < 0) {
1282 char errbuf[BUFSIZ];
1283 const char *err = str_error_r(-ret, errbuf, sizeof(errbuf));
1284
1285 ui__error("Could not read the CPU topology map: %s\n", err);
1286 return ret;
1287 }
1288 }
1289
1290 ret = perf_top__start_counters(top);
1291 if (ret)
1292 return ret;
1293
1294 top->session->evlist = top->evlist;
1295 perf_session__set_id_hdr_size(top->session);
1296
1297 /*
1298 * When perf is starting the traced process, all the events (apart from
1299 * group members) have enable_on_exec=1 set, so don't spoil it by
1300 * prematurely enabling them.
1301 *
1302 * XXX 'top' still doesn't start workloads like record, trace, but should,
1303 * so leave the check here.
1304 */
1305 if (!target__none(&opts->target))
1306 evlist__enable(top->evlist);
1307
1308 ret = -1;
1309 if (pthread_create(&thread_process, NULL, process_thread, top)) {
1310 ui__error("Could not create process thread.\n");
1311 return ret;
1312 }
1313
1314 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1315 display_thread), top)) {
1316 ui__error("Could not create display thread.\n");
1317 goto out_join_thread;
1318 }
1319
1320 if (top->realtime_prio) {
1321 struct sched_param param;
1322
1323 param.sched_priority = top->realtime_prio;
1324 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1325 ui__error("Could not set realtime priority.\n");
1326 goto out_join;
1327 }
1328 }
1329
1330 /* Wait for a minimal set of events before starting the snapshot */
1331 evlist__poll(top->evlist, 100);
1332
1333 perf_top__mmap_read(top);
1334
1335 while (!done) {
1336 u64 hits = top->samples;
1337
1338 perf_top__mmap_read(top);
1339
1340 if (opts->overwrite || (hits == top->samples))
1341 ret = evlist__poll(top->evlist, 100);
1342
1343 if (resize) {
1344 perf_top__resize(top);
1345 resize = 0;
1346 }
1347 }
1348
1349 ret = 0;
1350out_join:
1351 pthread_join(thread, NULL);
1352out_join_thread:
1353 cond_signal(&top->qe.cond);
1354 pthread_join(thread_process, NULL);
1355 return ret;
1356}
1357
1358static int
1359callchain_opt(const struct option *opt, const char *arg, int unset)
1360{
1361 symbol_conf.use_callchain = true;
1362 return record_callchain_opt(opt, arg, unset);
1363}
1364
1365static int
1366parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1367{
1368 struct callchain_param *callchain = opt->value;
1369
1370 callchain->enabled = !unset;
1371 callchain->record_mode = CALLCHAIN_FP;
1372
1373 /*
1374 * --no-call-graph
1375 */
1376 if (unset) {
1377 symbol_conf.use_callchain = false;
1378 callchain->record_mode = CALLCHAIN_NONE;
1379 return 0;
1380 }
1381
1382 return parse_callchain_top_opt(arg);
1383}
1384
1385static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
1386{
1387 if (!strcmp(var, "top.call-graph")) {
1388 var = "call-graph.record-mode";
1389 return perf_default_config(var, value, cb);
1390 }
1391 if (!strcmp(var, "top.children")) {
1392 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1393 return 0;
1394 }
1395
1396 return 0;
1397}
1398
1399static int
1400parse_percent_limit(const struct option *opt, const char *arg,
1401 int unset __maybe_unused)
1402{
1403 struct perf_top *top = opt->value;
1404
1405 top->min_percent = strtof(arg, NULL);
1406 return 0;
1407}
1408
1409const char top_callchain_help[] = CALLCHAIN_RECORD_HELP CALLCHAIN_REPORT_HELP
1410 "\n\t\t\t\tDefault: fp,graph,0.5,caller,function";
1411
1412int cmd_top(int argc, const char **argv)
1413{
1414 char errbuf[BUFSIZ];
1415 struct perf_top top = {
1416 .count_filter = 5,
1417 .delay_secs = 2,
1418 .record_opts = {
1419 .mmap_pages = UINT_MAX,
1420 .user_freq = UINT_MAX,
1421 .user_interval = ULLONG_MAX,
1422 .freq = 4000, /* 4 KHz */
1423 .target = {
1424 .uses_mmap = true,
1425 },
1426 /*
1427 * FIXME: This will lose PERF_RECORD_MMAP and other metadata
1428 * when we pause, fix that and reenable. Probably using a
1429 * separate evlist with a dummy event, i.e. a non-overwrite
1430 * ring buffer just for metadata events, while PERF_RECORD_SAMPLE
1431 * stays in overwrite mode. -acme
1432 * */
1433 .overwrite = 0,
1434 .sample_time = true,
1435 .sample_time_set = true,
1436 },
1437 .max_stack = sysctl__max_stack(),
1438 .annotation_opts = annotation__default_options,
1439 .nr_threads_synthesize = UINT_MAX,
1440 };
1441 struct record_opts *opts = &top.record_opts;
1442 struct target *target = &opts->target;
1443 const struct option options[] = {
1444 OPT_CALLBACK('e', "event", &top.evlist, "event",
1445 "event selector. use 'perf list' to list available events",
1446 parse_events_option),
1447 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1448 OPT_STRING('p', "pid", &target->pid, "pid",
1449 "profile events on existing process id"),
1450 OPT_STRING('t', "tid", &target->tid, "tid",
1451 "profile events on existing thread id"),
1452 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1453 "system-wide collection from all CPUs"),
1454 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1455 "list of cpus to monitor"),
1456 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1457 "file", "vmlinux pathname"),
1458 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1459 "don't load vmlinux even if found"),
1460 OPT_STRING(0, "kallsyms", &symbol_conf.kallsyms_name,
1461 "file", "kallsyms pathname"),
1462 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1463 "hide kernel symbols"),
1464 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1465 "number of mmap data pages", evlist__parse_mmap_pages),
1466 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1467 "collect data with this RT SCHED_FIFO priority"),
1468 OPT_INTEGER('d', "delay", &top.delay_secs,
1469 "number of seconds to delay between refreshes"),
1470 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1471 "dump the symbol table used for profiling"),
1472 OPT_INTEGER('f', "count-filter", &top.count_filter,
1473 "only display functions with more events than this"),
1474 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1475 "child tasks do not inherit counters"),
1476 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1477 "symbol to annotate"),
1478 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1479 OPT_CALLBACK('F', "freq", &top.record_opts, "freq or 'max'",
1480 "profile at this frequency",
1481 record__parse_freq),
1482 OPT_INTEGER('E', "entries", &top.print_entries,
1483 "display this many functions"),
1484 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1485 "hide user symbols"),
1486#ifdef HAVE_SLANG_SUPPORT
1487 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1488#endif
1489 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1490 OPT_INCR('v', "verbose", &verbose,
1491 "be more verbose (show counter open errors, etc)"),
1492 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1493 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1494 " Please refer the man page for the complete list."),
1495 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1496 "output field(s): overhead, period, sample plus all of sort keys"),
1497 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1498 "Show a column with the number of samples"),
1499 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1500 NULL, "enables call-graph recording and display",
1501 &callchain_opt),
1502 OPT_CALLBACK(0, "call-graph", &callchain_param,
1503 "record_mode[,record_size],print_type,threshold[,print_limit],order,sort_key[,branch]",
1504 top_callchain_help, &parse_callchain_opt),
1505 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1506 "Accumulate callchains of children and show total overhead as well"),
1507 OPT_INTEGER(0, "max-stack", &top.max_stack,
1508 "Set the maximum stack depth when parsing the callchain. "
1509 "Default: kernel.perf_event_max_stack or " __stringify(PERF_MAX_STACK_DEPTH)),
1510 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1511 "ignore callees of these functions in call graphs",
1512 report_parse_ignore_callees_opt),
1513 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1514 "Show a column with the sum of periods"),
1515 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1516 "only consider symbols in these dsos"),
1517 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1518 "only consider symbols in these comms"),
1519 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1520 "only consider these symbols"),
1521 OPT_BOOLEAN(0, "source", &top.annotation_opts.annotate_src,
1522 "Interleave source code with assembly code (default)"),
1523 OPT_BOOLEAN(0, "asm-raw", &top.annotation_opts.show_asm_raw,
1524 "Display raw encoding of assembly instructions (default)"),
1525 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1526 "Enable kernel symbol demangling"),
1527 OPT_BOOLEAN(0, "no-bpf-event", &top.record_opts.no_bpf_event, "do not record bpf events"),
1528 OPT_STRING(0, "objdump", &top.annotation_opts.objdump_path, "path",
1529 "objdump binary to use for disassembly and annotations"),
1530 OPT_STRING('M', "disassembler-style", &top.annotation_opts.disassembler_style, "disassembler style",
1531 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1532 OPT_STRING(0, "prefix", &top.annotation_opts.prefix, "prefix",
1533 "Add prefix to source file path names in programs (with --prefix-strip)"),
1534 OPT_STRING(0, "prefix-strip", &top.annotation_opts.prefix_strip, "N",
1535 "Strip first N entries of source file path name in programs (with --prefix)"),
1536 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1537 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1538 "Don't show entries under that percent", parse_percent_limit),
1539 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1540 "How to display percentage of filtered entries", parse_filter_percentage),
1541 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1542 "width[,width...]",
1543 "don't try to adjust column width, use these fixed values"),
1544 OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout,
1545 "per thread proc mmap processing timeout in ms"),
1546 OPT_CALLBACK_NOOPT('b', "branch-any", &opts->branch_stack,
1547 "branch any", "sample any taken branches",
1548 parse_branch_stack),
1549 OPT_CALLBACK('j', "branch-filter", &opts->branch_stack,
1550 "branch filter mask", "branch stack filter modes",
1551 parse_branch_stack),
1552 OPT_BOOLEAN(0, "raw-trace", &symbol_conf.raw_trace,
1553 "Show raw trace event output (do not use print fmt or plugins)"),
1554 OPT_BOOLEAN(0, "hierarchy", &symbol_conf.report_hierarchy,
1555 "Show entries in a hierarchy"),
1556 OPT_BOOLEAN(0, "overwrite", &top.record_opts.overwrite,
1557 "Use a backward ring buffer, default: no"),
1558 OPT_BOOLEAN(0, "force", &symbol_conf.force, "don't complain, do it"),
1559 OPT_UINTEGER(0, "num-thread-synthesize", &top.nr_threads_synthesize,
1560 "number of thread to run event synthesize"),
1561 OPT_CALLBACK('G', "cgroup", &top.evlist, "name",
1562 "monitor event in cgroup name only", parse_cgroups),
1563 OPT_BOOLEAN(0, "namespaces", &opts->record_namespaces,
1564 "Record namespaces events"),
1565 OPT_BOOLEAN(0, "all-cgroups", &opts->record_cgroup,
1566 "Record cgroup events"),
1567 OPT_INTEGER(0, "group-sort-idx", &symbol_conf.group_sort_idx,
1568 "Sort the output by the event at the index n in group. "
1569 "If n is invalid, sort by the first event. "
1570 "WARNING: should be used on grouped events."),
1571 OPT_BOOLEAN(0, "stitch-lbr", &top.stitch_lbr,
1572 "Enable LBR callgraph stitching approach"),
1573#ifdef HAVE_LIBPFM
1574 OPT_CALLBACK(0, "pfm-events", &top.evlist, "event",
1575 "libpfm4 event selector. use 'perf list' to list available events",
1576 parse_libpfm_events_option),
1577#endif
1578 OPTS_EVSWITCH(&top.evswitch),
1579 OPT_END()
1580 };
1581 const char * const top_usage[] = {
1582 "perf top [<options>]",
1583 NULL
1584 };
1585 int status = hists__init();
1586
1587 if (status < 0)
1588 return status;
1589
1590 top.annotation_opts.min_pcnt = 5;
1591 top.annotation_opts.context = 4;
1592
1593 top.evlist = evlist__new();
1594 if (top.evlist == NULL)
1595 return -ENOMEM;
1596
1597 status = perf_config(perf_top_config, &top);
1598 if (status)
1599 return status;
1600 /*
1601 * Since the per arch annotation init routine may need the cpuid, read
1602 * it here, since we are not getting this from the perf.data header.
1603 */
1604 status = perf_env__read_cpuid(&perf_env);
1605 if (status) {
1606 /*
1607 * Some arches do not provide a get_cpuid(), so just use pr_debug, otherwise
1608 * warn the user explicitly.
1609 */
1610 eprintf(status == ENOSYS ? 1 : 0, verbose,
1611 "Couldn't read the cpuid for this machine: %s\n",
1612 str_error_r(errno, errbuf, sizeof(errbuf)));
1613 }
1614 top.evlist->env = &perf_env;
1615
1616 argc = parse_options(argc, argv, options, top_usage, 0);
1617 if (argc)
1618 usage_with_options(top_usage, options);
1619
1620 status = symbol__validate_sym_arguments();
1621 if (status)
1622 goto out_delete_evlist;
1623
1624 if (annotate_check_args(&top.annotation_opts) < 0)
1625 goto out_delete_evlist;
1626
1627 if (!top.evlist->core.nr_entries &&
1628 evlist__add_default(top.evlist) < 0) {
1629 pr_err("Not enough memory for event selector list\n");
1630 goto out_delete_evlist;
1631 }
1632
1633 status = evswitch__init(&top.evswitch, top.evlist, stderr);
1634 if (status)
1635 goto out_delete_evlist;
1636
1637 if (symbol_conf.report_hierarchy) {
1638 /* disable incompatible options */
1639 symbol_conf.event_group = false;
1640 symbol_conf.cumulate_callchain = false;
1641
1642 if (field_order) {
1643 pr_err("Error: --hierarchy and --fields options cannot be used together\n");
1644 parse_options_usage(top_usage, options, "fields", 0);
1645 parse_options_usage(NULL, options, "hierarchy", 0);
1646 goto out_delete_evlist;
1647 }
1648 }
1649
1650 if (top.stitch_lbr && !(callchain_param.record_mode == CALLCHAIN_LBR)) {
1651 pr_err("Error: --stitch-lbr must be used with --call-graph lbr\n");
1652 goto out_delete_evlist;
1653 }
1654
1655 if (nr_cgroups > 0 && opts->record_cgroup) {
1656 pr_err("--cgroup and --all-cgroups cannot be used together\n");
1657 goto out_delete_evlist;
1658 }
1659
1660 if (opts->branch_stack && callchain_param.enabled)
1661 symbol_conf.show_branchflag_count = true;
1662
1663 sort__mode = SORT_MODE__TOP;
1664 /* display thread wants entries to be collapsed in a different tree */
1665 perf_hpp_list.need_collapse = 1;
1666
1667 if (top.use_stdio)
1668 use_browser = 0;
1669#ifdef HAVE_SLANG_SUPPORT
1670 else if (top.use_tui)
1671 use_browser = 1;
1672#endif
1673
1674 setup_browser(false);
1675
1676 if (setup_sorting(top.evlist) < 0) {
1677 if (sort_order)
1678 parse_options_usage(top_usage, options, "s", 1);
1679 if (field_order)
1680 parse_options_usage(sort_order ? NULL : top_usage,
1681 options, "fields", 0);
1682 goto out_delete_evlist;
1683 }
1684
1685 status = target__validate(target);
1686 if (status) {
1687 target__strerror(target, status, errbuf, BUFSIZ);
1688 ui__warning("%s\n", errbuf);
1689 }
1690
1691 status = target__parse_uid(target);
1692 if (status) {
1693 int saved_errno = errno;
1694
1695 target__strerror(target, status, errbuf, BUFSIZ);
1696 ui__error("%s\n", errbuf);
1697
1698 status = -saved_errno;
1699 goto out_delete_evlist;
1700 }
1701
1702 if (target__none(target))
1703 target->system_wide = true;
1704
1705 if (evlist__create_maps(top.evlist, target) < 0) {
1706 ui__error("Couldn't create thread/CPU maps: %s\n",
1707 errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf)));
1708 status = -errno;
1709 goto out_delete_evlist;
1710 }
1711
1712 if (top.delay_secs < 1)
1713 top.delay_secs = 1;
1714
1715 if (record_opts__config(opts)) {
1716 status = -EINVAL;
1717 goto out_delete_evlist;
1718 }
1719
1720 top.sym_evsel = evlist__first(top.evlist);
1721
1722 if (!callchain_param.enabled) {
1723 symbol_conf.cumulate_callchain = false;
1724 perf_hpp__cancel_cumulate();
1725 }
1726
1727 if (symbol_conf.cumulate_callchain && !callchain_param.order_set)
1728 callchain_param.order = ORDER_CALLER;
1729
1730 status = symbol__annotation_init();
1731 if (status < 0)
1732 goto out_delete_evlist;
1733
1734 annotation_config__init(&top.annotation_opts);
1735
1736 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1737 status = symbol__init(NULL);
1738 if (status < 0)
1739 goto out_delete_evlist;
1740
1741 sort__setup_elide(stdout);
1742
1743 get_term_dimensions(&top.winsize);
1744 if (top.print_entries == 0) {
1745 perf_top__update_print_entries(&top);
1746 signal(SIGWINCH, winch_sig);
1747 }
1748
1749 top.session = perf_session__new(NULL, NULL);
1750 if (IS_ERR(top.session)) {
1751 status = PTR_ERR(top.session);
1752 goto out_delete_evlist;
1753 }
1754
1755#ifdef HAVE_LIBBPF_SUPPORT
1756 if (!top.record_opts.no_bpf_event) {
1757 top.sb_evlist = evlist__new();
1758
1759 if (top.sb_evlist == NULL) {
1760 pr_err("Couldn't create side band evlist.\n.");
1761 status = -EINVAL;
1762 goto out_delete_evlist;
1763 }
1764
1765 if (evlist__add_bpf_sb_event(top.sb_evlist, &perf_env)) {
1766 pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n.");
1767 status = -EINVAL;
1768 goto out_delete_evlist;
1769 }
1770 }
1771#endif
1772
1773 if (evlist__start_sb_thread(top.sb_evlist, target)) {
1774 pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n");
1775 opts->no_bpf_event = true;
1776 }
1777
1778 status = __cmd_top(&top);
1779
1780 if (!opts->no_bpf_event)
1781 evlist__stop_sb_thread(top.sb_evlist);
1782
1783out_delete_evlist:
1784 evlist__delete(top.evlist);
1785 perf_session__delete(top.session);
1786
1787 return status;
1788}