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