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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/machine.h"
30#include "util/session.h"
31#include "util/symbol.h"
32#include "util/thread.h"
33#include "util/thread_map.h"
34#include "util/top.h"
35#include "util/util.h"
36#include <linux/rbtree.h>
37#include "util/parse-options.h"
38#include "util/parse-events.h"
39#include "util/cpumap.h"
40#include "util/xyarray.h"
41#include "util/sort.h"
42#include "util/intlist.h"
43#include "arch/common.h"
44
45#include "util/debug.h"
46
47#include <assert.h>
48#include <elf.h>
49#include <fcntl.h>
50
51#include <stdio.h>
52#include <termios.h>
53#include <unistd.h>
54#include <inttypes.h>
55
56#include <errno.h>
57#include <time.h>
58#include <sched.h>
59
60#include <sys/syscall.h>
61#include <sys/ioctl.h>
62#include <poll.h>
63#include <sys/prctl.h>
64#include <sys/wait.h>
65#include <sys/uio.h>
66#include <sys/utsname.h>
67#include <sys/mman.h>
68
69#include <linux/types.h>
70
71static volatile int done;
72
73#define HEADER_LINE_NR 5
74
75static void perf_top__update_print_entries(struct perf_top *top)
76{
77 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
78}
79
80static void perf_top__sig_winch(int sig __maybe_unused,
81 siginfo_t *info __maybe_unused, void *arg)
82{
83 struct perf_top *top = arg;
84
85 get_term_dimensions(&top->winsize);
86 perf_top__update_print_entries(top);
87}
88
89static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
90{
91 struct symbol *sym;
92 struct annotation *notes;
93 struct map *map;
94 int err = -1;
95
96 if (!he || !he->ms.sym)
97 return -1;
98
99 sym = he->ms.sym;
100 map = he->ms.map;
101
102
103
104
105 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
106 !dso__is_kcore(map->dso)) {
107 pr_err("Can't annotate %s: No vmlinux file was found in the "
108 "path\n", sym->name);
109 sleep(1);
110 return -1;
111 }
112
113 notes = symbol__annotation(sym);
114 if (notes->src != NULL) {
115 pthread_mutex_lock(¬es->lock);
116 goto out_assign;
117 }
118
119 pthread_mutex_lock(¬es->lock);
120
121 if (symbol__alloc_hist(sym) < 0) {
122 pthread_mutex_unlock(¬es->lock);
123 pr_err("Not enough memory for annotating '%s' symbol!\n",
124 sym->name);
125 sleep(1);
126 return err;
127 }
128
129 err = symbol__annotate(sym, map, 0);
130 if (err == 0) {
131out_assign:
132 top->sym_filter_entry = he;
133 }
134
135 pthread_mutex_unlock(¬es->lock);
136 return err;
137}
138
139static void __zero_source_counters(struct hist_entry *he)
140{
141 struct symbol *sym = he->ms.sym;
142 symbol__annotate_zero_histograms(sym);
143}
144
145static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
146{
147 struct utsname uts;
148 int err = uname(&uts);
149
150 ui__warning("Out of bounds address found:\n\n"
151 "Addr: %" PRIx64 "\n"
152 "DSO: %s %c\n"
153 "Map: %" PRIx64 "-%" PRIx64 "\n"
154 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
155 "Arch: %s\n"
156 "Kernel: %s\n"
157 "Tools: %s\n\n"
158 "Not all samples will be on the annotation output.\n\n"
159 "Please report to linux-kernel@vger.kernel.org\n",
160 ip, map->dso->long_name, dso__symtab_origin(map->dso),
161 map->start, map->end, sym->start, sym->end,
162 sym->binding == STB_GLOBAL ? 'g' :
163 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
164 err ? "[unknown]" : uts.machine,
165 err ? "[unknown]" : uts.release, perf_version_string);
166 if (use_browser <= 0)
167 sleep(5);
168
169 map->erange_warned = true;
170}
171
172static void perf_top__record_precise_ip(struct perf_top *top,
173 struct hist_entry *he,
174 int counter, u64 ip)
175{
176 struct annotation *notes;
177 struct symbol *sym;
178 int err = 0;
179
180 if (he == NULL || he->ms.sym == NULL ||
181 ((top->sym_filter_entry == NULL ||
182 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
183 return;
184
185 sym = he->ms.sym;
186 notes = symbol__annotation(sym);
187
188 if (pthread_mutex_trylock(¬es->lock))
189 return;
190
191 ip = he->ms.map->map_ip(he->ms.map, ip);
192
193 if (ui__has_annotation())
194 err = hist_entry__inc_addr_samples(he, counter, ip);
195
196 pthread_mutex_unlock(¬es->lock);
197
198
199
200
201
202 pthread_mutex_unlock(&he->hists->lock);
203
204 if (err == -ERANGE && !he->ms.map->erange_warned)
205 ui__warn_map_erange(he->ms.map, sym, ip);
206 else if (err == -ENOMEM) {
207 pr_err("Not enough memory for annotating '%s' symbol!\n",
208 sym->name);
209 sleep(1);
210 }
211
212 pthread_mutex_lock(&he->hists->lock);
213}
214
215static void perf_top__show_details(struct perf_top *top)
216{
217 struct hist_entry *he = top->sym_filter_entry;
218 struct annotation *notes;
219 struct symbol *symbol;
220 int more;
221
222 if (!he)
223 return;
224
225 symbol = he->ms.sym;
226 notes = symbol__annotation(symbol);
227
228 pthread_mutex_lock(¬es->lock);
229
230 if (notes->src == NULL)
231 goto out_unlock;
232
233 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
234 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
235
236 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
237 0, top->sym_pcnt_filter, top->print_entries, 4);
238 if (top->zero)
239 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
240 else
241 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
242 if (more != 0)
243 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
244out_unlock:
245 pthread_mutex_unlock(¬es->lock);
246}
247
248static void perf_top__print_sym_table(struct perf_top *top)
249{
250 char bf[160];
251 int printed = 0;
252 const int win_width = top->winsize.ws_col - 1;
253 struct hists *hists = evsel__hists(top->sym_evsel);
254
255 puts(CONSOLE_CLEAR);
256
257 perf_top__header_snprintf(top, bf, sizeof(bf));
258 printf("%s\n", bf);
259
260 perf_top__reset_sample_counters(top);
261
262 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
263
264 if (hists->stats.nr_lost_warned !=
265 hists->stats.nr_events[PERF_RECORD_LOST]) {
266 hists->stats.nr_lost_warned =
267 hists->stats.nr_events[PERF_RECORD_LOST];
268 color_fprintf(stdout, PERF_COLOR_RED,
269 "WARNING: LOST %d chunks, Check IO/CPU overload",
270 hists->stats.nr_lost_warned);
271 ++printed;
272 }
273
274 if (top->sym_filter_entry) {
275 perf_top__show_details(top);
276 return;
277 }
278
279 if (top->zero) {
280 hists__delete_entries(hists);
281 } else {
282 hists__decay_entries(hists, top->hide_user_symbols,
283 top->hide_kernel_symbols);
284 }
285
286 hists__collapse_resort(hists, NULL);
287 hists__output_resort(hists, NULL);
288
289 hists__output_recalc_col_len(hists, top->print_entries - printed);
290 putchar('\n');
291 hists__fprintf(hists, false, top->print_entries - printed, win_width,
292 top->min_percent, stdout);
293}
294
295static void prompt_integer(int *target, const char *msg)
296{
297 char *buf = malloc(0), *p;
298 size_t dummy = 0;
299 int tmp;
300
301 fprintf(stdout, "\n%s: ", msg);
302 if (getline(&buf, &dummy, stdin) < 0)
303 return;
304
305 p = strchr(buf, '\n');
306 if (p)
307 *p = 0;
308
309 p = buf;
310 while(*p) {
311 if (!isdigit(*p))
312 goto out_free;
313 p++;
314 }
315 tmp = strtoul(buf, NULL, 10);
316 *target = tmp;
317out_free:
318 free(buf);
319}
320
321static void prompt_percent(int *target, const char *msg)
322{
323 int tmp = 0;
324
325 prompt_integer(&tmp, msg);
326 if (tmp >= 0 && tmp <= 100)
327 *target = tmp;
328}
329
330static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
331{
332 char *buf = malloc(0), *p;
333 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
334 struct hists *hists = evsel__hists(top->sym_evsel);
335 struct rb_node *next;
336 size_t dummy = 0;
337
338
339 if (syme) {
340 __zero_source_counters(syme);
341 top->sym_filter_entry = NULL;
342 }
343
344 fprintf(stdout, "\n%s: ", msg);
345 if (getline(&buf, &dummy, stdin) < 0)
346 goto out_free;
347
348 p = strchr(buf, '\n');
349 if (p)
350 *p = 0;
351
352 next = rb_first(&hists->entries);
353 while (next) {
354 n = rb_entry(next, struct hist_entry, rb_node);
355 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
356 found = n;
357 break;
358 }
359 next = rb_next(&n->rb_node);
360 }
361
362 if (!found) {
363 fprintf(stderr, "Sorry, %s is not active.\n", buf);
364 sleep(1);
365 } else
366 perf_top__parse_source(top, found);
367
368out_free:
369 free(buf);
370}
371
372static void perf_top__print_mapped_keys(struct perf_top *top)
373{
374 char *name = NULL;
375
376 if (top->sym_filter_entry) {
377 struct symbol *sym = top->sym_filter_entry->ms.sym;
378 name = sym->name;
379 }
380
381 fprintf(stdout, "\nMapped keys:\n");
382 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
383 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
384
385 if (top->evlist->nr_entries > 1)
386 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
387
388 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
389
390 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
391 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
392 fprintf(stdout, "\t[S] stop annotation.\n");
393
394 fprintf(stdout,
395 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
396 top->hide_kernel_symbols ? "yes" : "no");
397 fprintf(stdout,
398 "\t[U] hide user symbols. \t(%s)\n",
399 top->hide_user_symbols ? "yes" : "no");
400 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
401 fprintf(stdout, "\t[qQ] quit.\n");
402}
403
404static int perf_top__key_mapped(struct perf_top *top, int c)
405{
406 switch (c) {
407 case 'd':
408 case 'e':
409 case 'f':
410 case 'z':
411 case 'q':
412 case 'Q':
413 case 'K':
414 case 'U':
415 case 'F':
416 case 's':
417 case 'S':
418 return 1;
419 case 'E':
420 return top->evlist->nr_entries > 1 ? 1 : 0;
421 default:
422 break;
423 }
424
425 return 0;
426}
427
428static bool perf_top__handle_keypress(struct perf_top *top, int c)
429{
430 bool ret = true;
431
432 if (!perf_top__key_mapped(top, c)) {
433 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
434 struct termios save;
435
436 perf_top__print_mapped_keys(top);
437 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
438 fflush(stdout);
439
440 set_term_quiet_input(&save);
441
442 poll(&stdin_poll, 1, -1);
443 c = getc(stdin);
444
445 tcsetattr(0, TCSAFLUSH, &save);
446 if (!perf_top__key_mapped(top, c))
447 return ret;
448 }
449
450 switch (c) {
451 case 'd':
452 prompt_integer(&top->delay_secs, "Enter display delay");
453 if (top->delay_secs < 1)
454 top->delay_secs = 1;
455 break;
456 case 'e':
457 prompt_integer(&top->print_entries, "Enter display entries (lines)");
458 if (top->print_entries == 0) {
459 struct sigaction act = {
460 .sa_sigaction = perf_top__sig_winch,
461 .sa_flags = SA_SIGINFO,
462 };
463 perf_top__sig_winch(SIGWINCH, NULL, top);
464 sigaction(SIGWINCH, &act, NULL);
465 } else {
466 signal(SIGWINCH, SIG_DFL);
467 }
468 break;
469 case 'E':
470 if (top->evlist->nr_entries > 1) {
471
472 int counter = 0;
473
474 fprintf(stderr, "\nAvailable events:");
475
476 evlist__for_each(top->evlist, top->sym_evsel)
477 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
478
479 prompt_integer(&counter, "Enter details event counter");
480
481 if (counter >= top->evlist->nr_entries) {
482 top->sym_evsel = perf_evlist__first(top->evlist);
483 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
484 sleep(1);
485 break;
486 }
487 evlist__for_each(top->evlist, top->sym_evsel)
488 if (top->sym_evsel->idx == counter)
489 break;
490 } else
491 top->sym_evsel = perf_evlist__first(top->evlist);
492 break;
493 case 'f':
494 prompt_integer(&top->count_filter, "Enter display event count filter");
495 break;
496 case 'F':
497 prompt_percent(&top->sym_pcnt_filter,
498 "Enter details display event filter (percent)");
499 break;
500 case 'K':
501 top->hide_kernel_symbols = !top->hide_kernel_symbols;
502 break;
503 case 'q':
504 case 'Q':
505 printf("exiting.\n");
506 if (top->dump_symtab)
507 perf_session__fprintf_dsos(top->session, stderr);
508 ret = false;
509 break;
510 case 's':
511 perf_top__prompt_symbol(top, "Enter details symbol");
512 break;
513 case 'S':
514 if (!top->sym_filter_entry)
515 break;
516 else {
517 struct hist_entry *syme = top->sym_filter_entry;
518
519 top->sym_filter_entry = NULL;
520 __zero_source_counters(syme);
521 }
522 break;
523 case 'U':
524 top->hide_user_symbols = !top->hide_user_symbols;
525 break;
526 case 'z':
527 top->zero = !top->zero;
528 break;
529 default:
530 break;
531 }
532
533 return ret;
534}
535
536static void perf_top__sort_new_samples(void *arg)
537{
538 struct perf_top *t = arg;
539 struct hists *hists;
540
541 perf_top__reset_sample_counters(t);
542
543 if (t->evlist->selected != NULL)
544 t->sym_evsel = t->evlist->selected;
545
546 hists = evsel__hists(t->sym_evsel);
547
548 if (t->zero) {
549 hists__delete_entries(hists);
550 } else {
551 hists__decay_entries(hists, t->hide_user_symbols,
552 t->hide_kernel_symbols);
553 }
554
555 hists__collapse_resort(hists, NULL);
556 hists__output_resort(hists, NULL);
557}
558
559static void *display_thread_tui(void *arg)
560{
561 struct perf_evsel *pos;
562 struct perf_top *top = arg;
563 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
564 struct hist_browser_timer hbt = {
565 .timer = perf_top__sort_new_samples,
566 .arg = top,
567 .refresh = top->delay_secs,
568 };
569
570 perf_top__sort_new_samples(top);
571
572
573
574
575
576
577 evlist__for_each(top->evlist, pos) {
578 struct hists *hists = evsel__hists(pos);
579 hists->uid_filter_str = top->record_opts.target.uid_str;
580 }
581
582 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
583 &top->session->header.env);
584
585 done = 1;
586 return NULL;
587}
588
589static void display_sig(int sig __maybe_unused)
590{
591 done = 1;
592}
593
594static void display_setup_sig(void)
595{
596 signal(SIGSEGV, display_sig);
597 signal(SIGFPE, display_sig);
598 signal(SIGINT, display_sig);
599 signal(SIGQUIT, display_sig);
600 signal(SIGTERM, display_sig);
601}
602
603static void *display_thread(void *arg)
604{
605 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
606 struct termios save;
607 struct perf_top *top = arg;
608 int delay_msecs, c;
609
610 display_setup_sig();
611 pthread__unblock_sigwinch();
612repeat:
613 delay_msecs = top->delay_secs * 1000;
614 set_term_quiet_input(&save);
615
616 getc(stdin);
617
618 while (!done) {
619 perf_top__print_sym_table(top);
620
621
622
623
624 switch (poll(&stdin_poll, 1, delay_msecs)) {
625 case 0:
626 continue;
627 case -1:
628 if (errno == EINTR)
629 continue;
630
631 default:
632 c = getc(stdin);
633 tcsetattr(0, TCSAFLUSH, &save);
634
635 if (perf_top__handle_keypress(top, c))
636 goto repeat;
637 done = 1;
638 }
639 }
640
641 tcsetattr(0, TCSAFLUSH, &save);
642 return NULL;
643}
644
645static int symbol_filter(struct map *map, struct symbol *sym)
646{
647 const char *name = sym->name;
648
649 if (!map->dso->kernel)
650 return 0;
651
652
653
654
655 if (name[0] == '.')
656 name++;
657
658 if (!strcmp(name, "_text") ||
659 !strcmp(name, "_etext") ||
660 !strcmp(name, "_sinittext") ||
661 !strncmp("init_module", name, 11) ||
662 !strncmp("cleanup_module", name, 14) ||
663 strstr(name, "_text_start") ||
664 strstr(name, "_text_end"))
665 return 1;
666
667 if (symbol__is_idle(sym))
668 sym->ignore = true;
669
670 return 0;
671}
672
673static int hist_iter__top_callback(struct hist_entry_iter *iter,
674 struct addr_location *al, bool single,
675 void *arg)
676{
677 struct perf_top *top = arg;
678 struct hist_entry *he = iter->he;
679 struct perf_evsel *evsel = iter->evsel;
680
681 if (sort__has_sym && single) {
682 u64 ip = al->addr;
683
684 if (al->map)
685 ip = al->map->unmap_ip(al->map, ip);
686
687 perf_top__record_precise_ip(top, he, evsel->idx, ip);
688 }
689
690 return 0;
691}
692
693static void perf_event__process_sample(struct perf_tool *tool,
694 const union perf_event *event,
695 struct perf_evsel *evsel,
696 struct perf_sample *sample,
697 struct machine *machine)
698{
699 struct perf_top *top = container_of(tool, struct perf_top, tool);
700 struct addr_location al;
701 int err;
702
703 if (!machine && perf_guest) {
704 static struct intlist *seen;
705
706 if (!seen)
707 seen = intlist__new(NULL);
708
709 if (!intlist__has_entry(seen, sample->pid)) {
710 pr_err("Can't find guest [%d]'s kernel information\n",
711 sample->pid);
712 intlist__add(seen, sample->pid);
713 }
714 return;
715 }
716
717 if (!machine) {
718 pr_err("%u unprocessable samples recorded.\r",
719 top->session->stats.nr_unprocessable_samples++);
720 return;
721 }
722
723 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
724 top->exact_samples++;
725
726 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0)
727 return;
728
729 if (!top->kptr_restrict_warned &&
730 symbol_conf.kptr_restrict &&
731 al.cpumode == PERF_RECORD_MISC_KERNEL) {
732 ui__warning(
733"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
734"Check /proc/sys/kernel/kptr_restrict.\n\n"
735"Kernel%s samples will not be resolved.\n",
736 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
737 " modules" : "");
738 if (use_browser <= 0)
739 sleep(5);
740 top->kptr_restrict_warned = true;
741 }
742
743 if (al.sym == NULL) {
744 const char *msg = "Kernel samples will not be resolved.\n";
745
746
747
748
749
750
751
752
753
754
755
756 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
757 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
758 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
759 if (symbol_conf.vmlinux_name) {
760 ui__warning("The %s file can't be used.\n%s",
761 symbol_conf.vmlinux_name, msg);
762 } else {
763 ui__warning("A vmlinux file was not found.\n%s",
764 msg);
765 }
766
767 if (use_browser <= 0)
768 sleep(5);
769 top->vmlinux_warned = true;
770 }
771 }
772
773 if (al.sym == NULL || !al.sym->ignore) {
774 struct hists *hists = evsel__hists(evsel);
775 struct hist_entry_iter iter = {
776 .add_entry_cb = hist_iter__top_callback,
777 };
778
779 if (symbol_conf.cumulate_callchain)
780 iter.ops = &hist_iter_cumulative;
781 else
782 iter.ops = &hist_iter_normal;
783
784 pthread_mutex_lock(&hists->lock);
785
786 err = hist_entry_iter__add(&iter, &al, evsel, sample,
787 top->max_stack, top);
788 if (err < 0)
789 pr_err("Problem incrementing symbol period, skipping event\n");
790
791 pthread_mutex_unlock(&hists->lock);
792 }
793
794 return;
795}
796
797static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
798{
799 struct perf_sample sample;
800 struct perf_evsel *evsel;
801 struct perf_session *session = top->session;
802 union perf_event *event;
803 struct machine *machine;
804 u8 origin;
805 int ret;
806
807 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
808 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
809 if (ret) {
810 pr_err("Can't parse sample, err = %d\n", ret);
811 goto next_event;
812 }
813
814 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
815 assert(evsel != NULL);
816
817 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
818
819 if (event->header.type == PERF_RECORD_SAMPLE)
820 ++top->samples;
821
822 switch (origin) {
823 case PERF_RECORD_MISC_USER:
824 ++top->us_samples;
825 if (top->hide_user_symbols)
826 goto next_event;
827 machine = &session->machines.host;
828 break;
829 case PERF_RECORD_MISC_KERNEL:
830 ++top->kernel_samples;
831 if (top->hide_kernel_symbols)
832 goto next_event;
833 machine = &session->machines.host;
834 break;
835 case PERF_RECORD_MISC_GUEST_KERNEL:
836 ++top->guest_kernel_samples;
837 machine = perf_session__find_machine(session,
838 sample.pid);
839 break;
840 case PERF_RECORD_MISC_GUEST_USER:
841 ++top->guest_us_samples;
842
843
844
845
846
847 default:
848 goto next_event;
849 }
850
851
852 if (event->header.type == PERF_RECORD_SAMPLE) {
853 perf_event__process_sample(&top->tool, event, evsel,
854 &sample, machine);
855 } else if (event->header.type < PERF_RECORD_MAX) {
856 hists__inc_nr_events(evsel__hists(evsel), event->header.type);
857 machine__process_event(machine, event, &sample);
858 } else
859 ++session->stats.nr_unknown_events;
860next_event:
861 perf_evlist__mmap_consume(top->evlist, idx);
862 }
863}
864
865static void perf_top__mmap_read(struct perf_top *top)
866{
867 int i;
868
869 for (i = 0; i < top->evlist->nr_mmaps; i++)
870 perf_top__mmap_read_idx(top, i);
871}
872
873static int perf_top__start_counters(struct perf_top *top)
874{
875 char msg[512];
876 struct perf_evsel *counter;
877 struct perf_evlist *evlist = top->evlist;
878 struct record_opts *opts = &top->record_opts;
879
880 perf_evlist__config(evlist, opts);
881
882 evlist__for_each(evlist, counter) {
883try_again:
884 if (perf_evsel__open(counter, top->evlist->cpus,
885 top->evlist->threads) < 0) {
886 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
887 if (verbose)
888 ui__warning("%s\n", msg);
889 goto try_again;
890 }
891
892 perf_evsel__open_strerror(counter, &opts->target,
893 errno, msg, sizeof(msg));
894 ui__error("%s\n", msg);
895 goto out_err;
896 }
897 }
898
899 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
900 ui__error("Failed to mmap with %d (%s)\n",
901 errno, strerror_r(errno, msg, sizeof(msg)));
902 goto out_err;
903 }
904
905 return 0;
906
907out_err:
908 return -1;
909}
910
911static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused)
912{
913 if (!sort__has_sym) {
914 if (symbol_conf.use_callchain) {
915 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
916 return -EINVAL;
917 }
918 } else if (callchain_param.mode != CHAIN_NONE) {
919 if (callchain_register_param(&callchain_param) < 0) {
920 ui__error("Can't register callchain params.\n");
921 return -EINVAL;
922 }
923 }
924
925 return 0;
926}
927
928static int __cmd_top(struct perf_top *top)
929{
930 struct record_opts *opts = &top->record_opts;
931 pthread_t thread;
932 int ret;
933
934 top->session = perf_session__new(NULL, false, NULL);
935 if (top->session == NULL)
936 return -1;
937
938 machines__set_symbol_filter(&top->session->machines, symbol_filter);
939
940 if (!objdump_path) {
941 ret = perf_session_env__lookup_objdump(&top->session->header.env);
942 if (ret)
943 goto out_delete;
944 }
945
946 ret = perf_top__setup_sample_type(top);
947 if (ret)
948 goto out_delete;
949
950 machine__synthesize_threads(&top->session->machines.host, &opts->target,
951 top->evlist->threads, false);
952 ret = perf_top__start_counters(top);
953 if (ret)
954 goto out_delete;
955
956 top->session->evlist = top->evlist;
957 perf_session__set_id_hdr_size(top->session);
958
959
960
961
962
963
964
965
966
967 if (!target__none(&opts->target))
968 perf_evlist__enable(top->evlist);
969
970
971 perf_evlist__poll(top->evlist, 100);
972
973 perf_top__mmap_read(top);
974
975 ret = -1;
976 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
977 display_thread), top)) {
978 ui__error("Could not create display thread.\n");
979 goto out_delete;
980 }
981
982 if (top->realtime_prio) {
983 struct sched_param param;
984
985 param.sched_priority = top->realtime_prio;
986 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
987 ui__error("Could not set realtime priority.\n");
988 goto out_join;
989 }
990 }
991
992 while (!done) {
993 u64 hits = top->samples;
994
995 perf_top__mmap_read(top);
996
997 if (hits == top->samples)
998 ret = perf_evlist__poll(top->evlist, 100);
999 }
1000
1001 ret = 0;
1002out_join:
1003 pthread_join(thread, NULL);
1004out_delete:
1005 perf_session__delete(top->session);
1006 top->session = NULL;
1007
1008 return ret;
1009}
1010
1011static int
1012callchain_opt(const struct option *opt, const char *arg, int unset)
1013{
1014 symbol_conf.use_callchain = true;
1015 return record_callchain_opt(opt, arg, unset);
1016}
1017
1018static int
1019parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1020{
1021 symbol_conf.use_callchain = true;
1022 return record_parse_callchain_opt(opt, arg, unset);
1023}
1024
1025static int perf_top_config(const char *var, const char *value, void *cb)
1026{
1027 if (!strcmp(var, "top.call-graph"))
1028 var = "call-graph.record-mode";
1029 if (!strcmp(var, "top.children")) {
1030 symbol_conf.cumulate_callchain = perf_config_bool(var, value);
1031 return 0;
1032 }
1033
1034 return perf_default_config(var, value, cb);
1035}
1036
1037static int
1038parse_percent_limit(const struct option *opt, const char *arg,
1039 int unset __maybe_unused)
1040{
1041 struct perf_top *top = opt->value;
1042
1043 top->min_percent = strtof(arg, NULL);
1044 return 0;
1045}
1046
1047int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1048{
1049 char errbuf[BUFSIZ];
1050 struct perf_top top = {
1051 .count_filter = 5,
1052 .delay_secs = 2,
1053 .record_opts = {
1054 .mmap_pages = UINT_MAX,
1055 .user_freq = UINT_MAX,
1056 .user_interval = ULLONG_MAX,
1057 .freq = 4000,
1058 .target = {
1059 .uses_mmap = true,
1060 },
1061 },
1062 .max_stack = PERF_MAX_STACK_DEPTH,
1063 .sym_pcnt_filter = 5,
1064 };
1065 struct record_opts *opts = &top.record_opts;
1066 struct target *target = &opts->target;
1067 const struct option options[] = {
1068 OPT_CALLBACK('e', "event", &top.evlist, "event",
1069 "event selector. use 'perf list' to list available events",
1070 parse_events_option),
1071 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1072 OPT_STRING('p', "pid", &target->pid, "pid",
1073 "profile events on existing process id"),
1074 OPT_STRING('t', "tid", &target->tid, "tid",
1075 "profile events on existing thread id"),
1076 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1077 "system-wide collection from all CPUs"),
1078 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1079 "list of cpus to monitor"),
1080 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1081 "file", "vmlinux pathname"),
1082 OPT_BOOLEAN(0, "ignore-vmlinux", &symbol_conf.ignore_vmlinux,
1083 "don't load vmlinux even if found"),
1084 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1085 "hide kernel symbols"),
1086 OPT_CALLBACK('m', "mmap-pages", &opts->mmap_pages, "pages",
1087 "number of mmap data pages",
1088 perf_evlist__parse_mmap_pages),
1089 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1090 "collect data with this RT SCHED_FIFO priority"),
1091 OPT_INTEGER('d', "delay", &top.delay_secs,
1092 "number of seconds to delay between refreshes"),
1093 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1094 "dump the symbol table used for profiling"),
1095 OPT_INTEGER('f', "count-filter", &top.count_filter,
1096 "only display functions with more events than this"),
1097 OPT_BOOLEAN(0, "group", &opts->group,
1098 "put the counters into a counter group"),
1099 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1100 "child tasks do not inherit counters"),
1101 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1102 "symbol to annotate"),
1103 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1104 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1105 OPT_INTEGER('E', "entries", &top.print_entries,
1106 "display this many functions"),
1107 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1108 "hide user symbols"),
1109 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1110 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1111 OPT_INCR('v', "verbose", &verbose,
1112 "be more verbose (show counter open errors, etc)"),
1113 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1114 "sort by key(s): pid, comm, dso, symbol, parent, cpu, srcline, ..."
1115 " Please refer the man page for the complete list."),
1116 OPT_STRING(0, "fields", &field_order, "key[,keys...]",
1117 "output field(s): overhead, period, sample plus all of sort keys"),
1118 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1119 "Show a column with the number of samples"),
1120 OPT_CALLBACK_NOOPT('g', NULL, &top.record_opts,
1121 NULL, "enables call-graph recording",
1122 &callchain_opt),
1123 OPT_CALLBACK(0, "call-graph", &top.record_opts,
1124 "mode[,dump_size]", record_callchain_help,
1125 &parse_callchain_opt),
1126 OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
1127 "Accumulate callchains of children and show total overhead as well"),
1128 OPT_INTEGER(0, "max-stack", &top.max_stack,
1129 "Set the maximum stack depth when parsing the callchain. "
1130 "Default: " __stringify(PERF_MAX_STACK_DEPTH)),
1131 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1132 "ignore callees of these functions in call graphs",
1133 report_parse_ignore_callees_opt),
1134 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1135 "Show a column with the sum of periods"),
1136 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1137 "only consider symbols in these dsos"),
1138 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1139 "only consider symbols in these comms"),
1140 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1141 "only consider these symbols"),
1142 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1143 "Interleave source code with assembly code (default)"),
1144 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1145 "Display raw encoding of assembly instructions (default)"),
1146 OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
1147 "Enable kernel symbol demangling"),
1148 OPT_STRING(0, "objdump", &objdump_path, "path",
1149 "objdump binary to use for disassembly and annotations"),
1150 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1151 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1152 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1153 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1154 "Don't show entries under that percent", parse_percent_limit),
1155 OPT_CALLBACK(0, "percentage", NULL, "relative|absolute",
1156 "How to display percentage of filtered entries", parse_filter_percentage),
1157 OPT_STRING('w', "column-widths", &symbol_conf.col_width_list_str,
1158 "width[,width...]",
1159 "don't try to adjust column width, use these fixed values"),
1160 OPT_END()
1161 };
1162 const char * const top_usage[] = {
1163 "perf top [<options>]",
1164 NULL
1165 };
1166 int status = hists__init();
1167
1168 if (status < 0)
1169 return status;
1170
1171 top.evlist = perf_evlist__new();
1172 if (top.evlist == NULL)
1173 return -ENOMEM;
1174
1175 perf_config(perf_top_config, &top);
1176
1177 argc = parse_options(argc, argv, options, top_usage, 0);
1178 if (argc)
1179 usage_with_options(top_usage, options);
1180
1181 sort__mode = SORT_MODE__TOP;
1182
1183 sort__need_collapse = 1;
1184
1185 if (setup_sorting() < 0) {
1186 if (sort_order)
1187 parse_options_usage(top_usage, options, "s", 1);
1188 if (field_order)
1189 parse_options_usage(sort_order ? NULL : top_usage,
1190 options, "fields", 0);
1191 goto out_delete_evlist;
1192 }
1193
1194 if (top.use_stdio)
1195 use_browser = 0;
1196 else if (top.use_tui)
1197 use_browser = 1;
1198
1199 setup_browser(false);
1200
1201 status = target__validate(target);
1202 if (status) {
1203 target__strerror(target, status, errbuf, BUFSIZ);
1204 ui__warning("%s\n", errbuf);
1205 }
1206
1207 status = target__parse_uid(target);
1208 if (status) {
1209 int saved_errno = errno;
1210
1211 target__strerror(target, status, errbuf, BUFSIZ);
1212 ui__error("%s\n", errbuf);
1213
1214 status = -saved_errno;
1215 goto out_delete_evlist;
1216 }
1217
1218 if (target__none(target))
1219 target->system_wide = true;
1220
1221 if (perf_evlist__create_maps(top.evlist, target) < 0)
1222 usage_with_options(top_usage, options);
1223
1224 if (!top.evlist->nr_entries &&
1225 perf_evlist__add_default(top.evlist) < 0) {
1226 ui__error("Not enough memory for event selector list\n");
1227 goto out_delete_evlist;
1228 }
1229
1230 symbol_conf.nr_events = top.evlist->nr_entries;
1231
1232 if (top.delay_secs < 1)
1233 top.delay_secs = 1;
1234
1235 if (record_opts__config(opts)) {
1236 status = -EINVAL;
1237 goto out_delete_evlist;
1238 }
1239
1240 top.sym_evsel = perf_evlist__first(top.evlist);
1241
1242 if (!symbol_conf.use_callchain) {
1243 symbol_conf.cumulate_callchain = false;
1244 perf_hpp__cancel_cumulate();
1245 }
1246
1247 symbol_conf.priv_size = sizeof(struct annotation);
1248
1249 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1250 if (symbol__init(NULL) < 0)
1251 return -1;
1252
1253 sort__setup_elide(stdout);
1254
1255 get_term_dimensions(&top.winsize);
1256 if (top.print_entries == 0) {
1257 struct sigaction act = {
1258 .sa_sigaction = perf_top__sig_winch,
1259 .sa_flags = SA_SIGINFO,
1260 };
1261 perf_top__update_print_entries(&top);
1262 sigaction(SIGWINCH, &act, NULL);
1263 }
1264
1265 status = __cmd_top(&top);
1266
1267out_delete_evlist:
1268 perf_evlist__delete(top.evlist);
1269
1270 return status;
1271}
1272
