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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 <sys/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/unistd.h>
70#include <linux/types.h>
71
72static volatile int done;
73
74#define HEADER_LINE_NR 5
75
76static void perf_top__update_print_entries(struct perf_top *top)
77{
78 top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
79}
80
81static void perf_top__sig_winch(int sig __maybe_unused,
82 siginfo_t *info __maybe_unused, void *arg)
83{
84 struct perf_top *top = arg;
85
86 get_term_dimensions(&top->winsize);
87 perf_top__update_print_entries(top);
88}
89
90static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
91{
92 struct symbol *sym;
93 struct annotation *notes;
94 struct map *map;
95 int err = -1;
96
97 if (!he || !he->ms.sym)
98 return -1;
99
100 sym = he->ms.sym;
101 map = he->ms.map;
102
103
104
105
106 if (map->dso->symtab_type == DSO_BINARY_TYPE__KALLSYMS &&
107 !dso__is_kcore(map->dso)) {
108 pr_err("Can't annotate %s: No vmlinux file was found in the "
109 "path\n", sym->name);
110 sleep(1);
111 return -1;
112 }
113
114 notes = symbol__annotation(sym);
115 if (notes->src != NULL) {
116 pthread_mutex_lock(¬es->lock);
117 goto out_assign;
118 }
119
120 pthread_mutex_lock(¬es->lock);
121
122 if (symbol__alloc_hist(sym) < 0) {
123 pthread_mutex_unlock(¬es->lock);
124 pr_err("Not enough memory for annotating '%s' symbol!\n",
125 sym->name);
126 sleep(1);
127 return err;
128 }
129
130 err = symbol__annotate(sym, map, 0);
131 if (err == 0) {
132out_assign:
133 top->sym_filter_entry = he;
134 }
135
136 pthread_mutex_unlock(¬es->lock);
137 return err;
138}
139
140static void __zero_source_counters(struct hist_entry *he)
141{
142 struct symbol *sym = he->ms.sym;
143 symbol__annotate_zero_histograms(sym);
144}
145
146static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
147{
148 struct utsname uts;
149 int err = uname(&uts);
150
151 ui__warning("Out of bounds address found:\n\n"
152 "Addr: %" PRIx64 "\n"
153 "DSO: %s %c\n"
154 "Map: %" PRIx64 "-%" PRIx64 "\n"
155 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
156 "Arch: %s\n"
157 "Kernel: %s\n"
158 "Tools: %s\n\n"
159 "Not all samples will be on the annotation output.\n\n"
160 "Please report to linux-kernel@vger.kernel.org\n",
161 ip, map->dso->long_name, dso__symtab_origin(map->dso),
162 map->start, map->end, sym->start, sym->end,
163 sym->binding == STB_GLOBAL ? 'g' :
164 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
165 err ? "[unknown]" : uts.machine,
166 err ? "[unknown]" : uts.release, perf_version_string);
167 if (use_browser <= 0)
168 sleep(5);
169
170 map->erange_warned = true;
171}
172
173static void perf_top__record_precise_ip(struct perf_top *top,
174 struct hist_entry *he,
175 int counter, u64 ip)
176{
177 struct annotation *notes;
178 struct symbol *sym;
179 int err;
180
181 if (he == NULL || he->ms.sym == NULL ||
182 ((top->sym_filter_entry == NULL ||
183 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
184 return;
185
186 sym = he->ms.sym;
187 notes = symbol__annotation(sym);
188
189 if (pthread_mutex_trylock(¬es->lock))
190 return;
191
192 if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
193 pthread_mutex_unlock(¬es->lock);
194 pr_err("Not enough memory for annotating '%s' symbol!\n",
195 sym->name);
196 sleep(1);
197 return;
198 }
199
200 ip = he->ms.map->map_ip(he->ms.map, ip);
201 err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
202
203 pthread_mutex_unlock(¬es->lock);
204
205 if (err == -ERANGE && !he->ms.map->erange_warned)
206 ui__warn_map_erange(he->ms.map, sym, ip);
207}
208
209static void perf_top__show_details(struct perf_top *top)
210{
211 struct hist_entry *he = top->sym_filter_entry;
212 struct annotation *notes;
213 struct symbol *symbol;
214 int more;
215
216 if (!he)
217 return;
218
219 symbol = he->ms.sym;
220 notes = symbol__annotation(symbol);
221
222 pthread_mutex_lock(¬es->lock);
223
224 if (notes->src == NULL)
225 goto out_unlock;
226
227 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
228 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
229
230 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
231 0, top->sym_pcnt_filter, top->print_entries, 4);
232 if (top->zero)
233 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
234 else
235 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
236 if (more != 0)
237 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
238out_unlock:
239 pthread_mutex_unlock(¬es->lock);
240}
241
242static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
243 struct addr_location *al,
244 struct perf_sample *sample)
245{
246 struct hist_entry *he;
247
248 pthread_mutex_lock(&evsel->hists.lock);
249 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period,
250 sample->weight);
251 pthread_mutex_unlock(&evsel->hists.lock);
252
253 if (he == NULL)
254 return NULL;
255
256 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
257 return he;
258}
259
260static void perf_top__print_sym_table(struct perf_top *top)
261{
262 char bf[160];
263 int printed = 0;
264 const int win_width = top->winsize.ws_col - 1;
265
266 puts(CONSOLE_CLEAR);
267
268 perf_top__header_snprintf(top, bf, sizeof(bf));
269 printf("%s\n", bf);
270
271 perf_top__reset_sample_counters(top);
272
273 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
274
275 if (top->sym_evsel->hists.stats.nr_lost_warned !=
276 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
277 top->sym_evsel->hists.stats.nr_lost_warned =
278 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
279 color_fprintf(stdout, PERF_COLOR_RED,
280 "WARNING: LOST %d chunks, Check IO/CPU overload",
281 top->sym_evsel->hists.stats.nr_lost_warned);
282 ++printed;
283 }
284
285 if (top->sym_filter_entry) {
286 perf_top__show_details(top);
287 return;
288 }
289
290 hists__collapse_resort(&top->sym_evsel->hists);
291 hists__output_resort(&top->sym_evsel->hists);
292 hists__decay_entries(&top->sym_evsel->hists,
293 top->hide_user_symbols,
294 top->hide_kernel_symbols);
295 hists__output_recalc_col_len(&top->sym_evsel->hists,
296 top->print_entries - printed);
297 putchar('\n');
298 hists__fprintf(&top->sym_evsel->hists, false,
299 top->print_entries - printed, win_width,
300 top->min_percent, stdout);
301}
302
303static void prompt_integer(int *target, const char *msg)
304{
305 char *buf = malloc(0), *p;
306 size_t dummy = 0;
307 int tmp;
308
309 fprintf(stdout, "\n%s: ", msg);
310 if (getline(&buf, &dummy, stdin) < 0)
311 return;
312
313 p = strchr(buf, '\n');
314 if (p)
315 *p = 0;
316
317 p = buf;
318 while(*p) {
319 if (!isdigit(*p))
320 goto out_free;
321 p++;
322 }
323 tmp = strtoul(buf, NULL, 10);
324 *target = tmp;
325out_free:
326 free(buf);
327}
328
329static void prompt_percent(int *target, const char *msg)
330{
331 int tmp = 0;
332
333 prompt_integer(&tmp, msg);
334 if (tmp >= 0 && tmp <= 100)
335 *target = tmp;
336}
337
338static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
339{
340 char *buf = malloc(0), *p;
341 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
342 struct rb_node *next;
343 size_t dummy = 0;
344
345
346 if (syme) {
347 __zero_source_counters(syme);
348 top->sym_filter_entry = NULL;
349 }
350
351 fprintf(stdout, "\n%s: ", msg);
352 if (getline(&buf, &dummy, stdin) < 0)
353 goto out_free;
354
355 p = strchr(buf, '\n');
356 if (p)
357 *p = 0;
358
359 next = rb_first(&top->sym_evsel->hists.entries);
360 while (next) {
361 n = rb_entry(next, struct hist_entry, rb_node);
362 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
363 found = n;
364 break;
365 }
366 next = rb_next(&n->rb_node);
367 }
368
369 if (!found) {
370 fprintf(stderr, "Sorry, %s is not active.\n", buf);
371 sleep(1);
372 } else
373 perf_top__parse_source(top, found);
374
375out_free:
376 free(buf);
377}
378
379static void perf_top__print_mapped_keys(struct perf_top *top)
380{
381 char *name = NULL;
382
383 if (top->sym_filter_entry) {
384 struct symbol *sym = top->sym_filter_entry->ms.sym;
385 name = sym->name;
386 }
387
388 fprintf(stdout, "\nMapped keys:\n");
389 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
390 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
391
392 if (top->evlist->nr_entries > 1)
393 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", perf_evsel__name(top->sym_evsel));
394
395 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
396
397 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
398 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
399 fprintf(stdout, "\t[S] stop annotation.\n");
400
401 fprintf(stdout,
402 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
403 top->hide_kernel_symbols ? "yes" : "no");
404 fprintf(stdout,
405 "\t[U] hide user symbols. \t(%s)\n",
406 top->hide_user_symbols ? "yes" : "no");
407 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
408 fprintf(stdout, "\t[qQ] quit.\n");
409}
410
411static int perf_top__key_mapped(struct perf_top *top, int c)
412{
413 switch (c) {
414 case 'd':
415 case 'e':
416 case 'f':
417 case 'z':
418 case 'q':
419 case 'Q':
420 case 'K':
421 case 'U':
422 case 'F':
423 case 's':
424 case 'S':
425 return 1;
426 case 'E':
427 return top->evlist->nr_entries > 1 ? 1 : 0;
428 default:
429 break;
430 }
431
432 return 0;
433}
434
435static bool perf_top__handle_keypress(struct perf_top *top, int c)
436{
437 bool ret = true;
438
439 if (!perf_top__key_mapped(top, c)) {
440 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
441 struct termios tc, save;
442
443 perf_top__print_mapped_keys(top);
444 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
445 fflush(stdout);
446
447 tcgetattr(0, &save);
448 tc = save;
449 tc.c_lflag &= ~(ICANON | ECHO);
450 tc.c_cc[VMIN] = 0;
451 tc.c_cc[VTIME] = 0;
452 tcsetattr(0, TCSANOW, &tc);
453
454 poll(&stdin_poll, 1, -1);
455 c = getc(stdin);
456
457 tcsetattr(0, TCSAFLUSH, &save);
458 if (!perf_top__key_mapped(top, c))
459 return ret;
460 }
461
462 switch (c) {
463 case 'd':
464 prompt_integer(&top->delay_secs, "Enter display delay");
465 if (top->delay_secs < 1)
466 top->delay_secs = 1;
467 break;
468 case 'e':
469 prompt_integer(&top->print_entries, "Enter display entries (lines)");
470 if (top->print_entries == 0) {
471 struct sigaction act = {
472 .sa_sigaction = perf_top__sig_winch,
473 .sa_flags = SA_SIGINFO,
474 };
475 perf_top__sig_winch(SIGWINCH, NULL, top);
476 sigaction(SIGWINCH, &act, NULL);
477 } else {
478 signal(SIGWINCH, SIG_DFL);
479 }
480 break;
481 case 'E':
482 if (top->evlist->nr_entries > 1) {
483
484 int counter = 0;
485
486 fprintf(stderr, "\nAvailable events:");
487
488 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
489 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, perf_evsel__name(top->sym_evsel));
490
491 prompt_integer(&counter, "Enter details event counter");
492
493 if (counter >= top->evlist->nr_entries) {
494 top->sym_evsel = perf_evlist__first(top->evlist);
495 fprintf(stderr, "Sorry, no such event, using %s.\n", perf_evsel__name(top->sym_evsel));
496 sleep(1);
497 break;
498 }
499 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
500 if (top->sym_evsel->idx == counter)
501 break;
502 } else
503 top->sym_evsel = perf_evlist__first(top->evlist);
504 break;
505 case 'f':
506 prompt_integer(&top->count_filter, "Enter display event count filter");
507 break;
508 case 'F':
509 prompt_percent(&top->sym_pcnt_filter,
510 "Enter details display event filter (percent)");
511 break;
512 case 'K':
513 top->hide_kernel_symbols = !top->hide_kernel_symbols;
514 break;
515 case 'q':
516 case 'Q':
517 printf("exiting.\n");
518 if (top->dump_symtab)
519 perf_session__fprintf_dsos(top->session, stderr);
520 ret = false;
521 break;
522 case 's':
523 perf_top__prompt_symbol(top, "Enter details symbol");
524 break;
525 case 'S':
526 if (!top->sym_filter_entry)
527 break;
528 else {
529 struct hist_entry *syme = top->sym_filter_entry;
530
531 top->sym_filter_entry = NULL;
532 __zero_source_counters(syme);
533 }
534 break;
535 case 'U':
536 top->hide_user_symbols = !top->hide_user_symbols;
537 break;
538 case 'z':
539 top->zero = !top->zero;
540 break;
541 default:
542 break;
543 }
544
545 return ret;
546}
547
548static void perf_top__sort_new_samples(void *arg)
549{
550 struct perf_top *t = arg;
551 perf_top__reset_sample_counters(t);
552
553 if (t->evlist->selected != NULL)
554 t->sym_evsel = t->evlist->selected;
555
556 hists__collapse_resort(&t->sym_evsel->hists);
557 hists__output_resort(&t->sym_evsel->hists);
558 hists__decay_entries(&t->sym_evsel->hists,
559 t->hide_user_symbols,
560 t->hide_kernel_symbols);
561}
562
563static void *display_thread_tui(void *arg)
564{
565 struct perf_evsel *pos;
566 struct perf_top *top = arg;
567 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
568 struct hist_browser_timer hbt = {
569 .timer = perf_top__sort_new_samples,
570 .arg = top,
571 .refresh = top->delay_secs,
572 };
573
574 perf_top__sort_new_samples(top);
575
576
577
578
579
580
581 list_for_each_entry(pos, &top->evlist->entries, node)
582 pos->hists.uid_filter_str = top->record_opts.target.uid_str;
583
584 perf_evlist__tui_browse_hists(top->evlist, help, &hbt, top->min_percent,
585 &top->session->header.env);
586
587 done = 1;
588 return NULL;
589}
590
591static void *display_thread(void *arg)
592{
593 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
594 struct termios tc, save;
595 struct perf_top *top = arg;
596 int delay_msecs, c;
597
598 tcgetattr(0, &save);
599 tc = save;
600 tc.c_lflag &= ~(ICANON | ECHO);
601 tc.c_cc[VMIN] = 0;
602 tc.c_cc[VTIME] = 0;
603
604 pthread__unblock_sigwinch();
605repeat:
606 delay_msecs = top->delay_secs * 1000;
607 tcsetattr(0, TCSANOW, &tc);
608
609 getc(stdin);
610
611 while (!done) {
612 perf_top__print_sym_table(top);
613
614
615
616
617 switch (poll(&stdin_poll, 1, delay_msecs)) {
618 case 0:
619 continue;
620 case -1:
621 if (errno == EINTR)
622 continue;
623
624 default:
625 c = getc(stdin);
626 tcsetattr(0, TCSAFLUSH, &save);
627
628 if (perf_top__handle_keypress(top, c))
629 goto repeat;
630 done = 1;
631 }
632 }
633
634 return NULL;
635}
636
637
638static const char *skip_symbols[] = {
639 "intel_idle",
640 "default_idle",
641 "native_safe_halt",
642 "cpu_idle",
643 "enter_idle",
644 "exit_idle",
645 "mwait_idle",
646 "mwait_idle_with_hints",
647 "poll_idle",
648 "ppc64_runlatch_off",
649 "pseries_dedicated_idle_sleep",
650 NULL
651};
652
653static int symbol_filter(struct map *map __maybe_unused, struct symbol *sym)
654{
655 const char *name = sym->name;
656 int i;
657
658
659
660
661
662 if (name[0] == '.')
663 name++;
664
665 if (!strcmp(name, "_text") ||
666 !strcmp(name, "_etext") ||
667 !strcmp(name, "_sinittext") ||
668 !strncmp("init_module", name, 11) ||
669 !strncmp("cleanup_module", name, 14) ||
670 strstr(name, "_text_start") ||
671 strstr(name, "_text_end"))
672 return 1;
673
674 for (i = 0; skip_symbols[i]; i++) {
675 if (!strcmp(skip_symbols[i], name)) {
676 sym->ignore = true;
677 break;
678 }
679 }
680
681 return 0;
682}
683
684static void perf_event__process_sample(struct perf_tool *tool,
685 const union perf_event *event,
686 struct perf_evsel *evsel,
687 struct perf_sample *sample,
688 struct machine *machine)
689{
690 struct perf_top *top = container_of(tool, struct perf_top, tool);
691 struct symbol *parent = NULL;
692 u64 ip = sample->ip;
693 struct addr_location al;
694 int err;
695
696 if (!machine && perf_guest) {
697 static struct intlist *seen;
698
699 if (!seen)
700 seen = intlist__new(NULL);
701
702 if (!intlist__has_entry(seen, sample->pid)) {
703 pr_err("Can't find guest [%d]'s kernel information\n",
704 sample->pid);
705 intlist__add(seen, sample->pid);
706 }
707 return;
708 }
709
710 if (!machine) {
711 pr_err("%u unprocessable samples recorded.\r",
712 top->session->stats.nr_unprocessable_samples++);
713 return;
714 }
715
716 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
717 top->exact_samples++;
718
719 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0 ||
720 al.filtered)
721 return;
722
723 if (!top->kptr_restrict_warned &&
724 symbol_conf.kptr_restrict &&
725 al.cpumode == PERF_RECORD_MISC_KERNEL) {
726 ui__warning(
727"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
728"Check /proc/sys/kernel/kptr_restrict.\n\n"
729"Kernel%s samples will not be resolved.\n",
730 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
731 " modules" : "");
732 if (use_browser <= 0)
733 sleep(5);
734 top->kptr_restrict_warned = true;
735 }
736
737 if (al.sym == NULL) {
738 const char *msg = "Kernel samples will not be resolved.\n";
739
740
741
742
743
744
745
746
747
748
749
750 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
751 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
752 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
753 if (symbol_conf.vmlinux_name) {
754 ui__warning("The %s file can't be used.\n%s",
755 symbol_conf.vmlinux_name, msg);
756 } else {
757 ui__warning("A vmlinux file was not found.\n%s",
758 msg);
759 }
760
761 if (use_browser <= 0)
762 sleep(5);
763 top->vmlinux_warned = true;
764 }
765 }
766
767 if (al.sym == NULL || !al.sym->ignore) {
768 struct hist_entry *he;
769
770 if ((sort__has_parent || symbol_conf.use_callchain) &&
771 sample->callchain) {
772 err = machine__resolve_callchain(machine, evsel,
773 al.thread, sample,
774 &parent, &al);
775 if (err)
776 return;
777 }
778
779 he = perf_evsel__add_hist_entry(evsel, &al, sample);
780 if (he == NULL) {
781 pr_err("Problem incrementing symbol period, skipping event\n");
782 return;
783 }
784
785 if (symbol_conf.use_callchain) {
786 err = callchain_append(he->callchain, &callchain_cursor,
787 sample->period);
788 if (err)
789 return;
790 }
791
792 if (sort__has_sym)
793 perf_top__record_precise_ip(top, he, evsel->idx, ip);
794 }
795
796 return;
797}
798
799static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
800{
801 struct perf_sample sample;
802 struct perf_evsel *evsel;
803 struct perf_session *session = top->session;
804 union perf_event *event;
805 struct machine *machine;
806 u8 origin;
807 int ret;
808
809 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
810 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
811 if (ret) {
812 pr_err("Can't parse sample, err = %d\n", ret);
813 goto next_event;
814 }
815
816 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
817 assert(evsel != NULL);
818
819 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
820
821 if (event->header.type == PERF_RECORD_SAMPLE)
822 ++top->samples;
823
824 switch (origin) {
825 case PERF_RECORD_MISC_USER:
826 ++top->us_samples;
827 if (top->hide_user_symbols)
828 goto next_event;
829 machine = &session->machines.host;
830 break;
831 case PERF_RECORD_MISC_KERNEL:
832 ++top->kernel_samples;
833 if (top->hide_kernel_symbols)
834 goto next_event;
835 machine = &session->machines.host;
836 break;
837 case PERF_RECORD_MISC_GUEST_KERNEL:
838 ++top->guest_kernel_samples;
839 machine = perf_session__find_machine(session,
840 sample.pid);
841 break;
842 case PERF_RECORD_MISC_GUEST_USER:
843 ++top->guest_us_samples;
844
845
846
847
848
849 default:
850 goto next_event;
851 }
852
853
854 if (event->header.type == PERF_RECORD_SAMPLE) {
855 perf_event__process_sample(&top->tool, event, evsel,
856 &sample, machine);
857 } else if (event->header.type < PERF_RECORD_MAX) {
858 hists__inc_nr_events(&evsel->hists, event->header.type);
859 machine__process_event(machine, event);
860 } else
861 ++session->stats.nr_unknown_events;
862next_event:
863 perf_evlist__mmap_consume(top->evlist, idx);
864 }
865}
866
867static void perf_top__mmap_read(struct perf_top *top)
868{
869 int i;
870
871 for (i = 0; i < top->evlist->nr_mmaps; i++)
872 perf_top__mmap_read_idx(top, i);
873}
874
875static int perf_top__start_counters(struct perf_top *top)
876{
877 char msg[512];
878 struct perf_evsel *counter;
879 struct perf_evlist *evlist = top->evlist;
880 struct perf_record_opts *opts = &top->record_opts;
881
882 perf_evlist__config(evlist, opts);
883
884 list_for_each_entry(counter, &evlist->entries, node) {
885try_again:
886 if (perf_evsel__open(counter, top->evlist->cpus,
887 top->evlist->threads) < 0) {
888 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
889 if (verbose)
890 ui__warning("%s\n", msg);
891 goto try_again;
892 }
893
894 perf_evsel__open_strerror(counter, &opts->target,
895 errno, msg, sizeof(msg));
896 ui__error("%s\n", msg);
897 goto out_err;
898 }
899 }
900
901 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
902 ui__error("Failed to mmap with %d (%s)\n",
903 errno, strerror(errno));
904 goto out_err;
905 }
906
907 return 0;
908
909out_err:
910 return -1;
911}
912
913static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused)
914{
915 if (!sort__has_sym) {
916 if (symbol_conf.use_callchain) {
917 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
918 return -EINVAL;
919 }
920 } else if (callchain_param.mode != CHAIN_NONE) {
921 if (callchain_register_param(&callchain_param) < 0) {
922 ui__error("Can't register callchain params.\n");
923 return -EINVAL;
924 }
925 }
926
927 return 0;
928}
929
930static int __cmd_top(struct perf_top *top)
931{
932 struct perf_record_opts *opts = &top->record_opts;
933 pthread_t thread;
934 int ret;
935
936
937
938
939 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
940 if (top->session == NULL)
941 return -ENOMEM;
942
943 machines__set_symbol_filter(&top->session->machines, symbol_filter);
944
945 if (!objdump_path) {
946 ret = perf_session_env__lookup_objdump(&top->session->header.env);
947 if (ret)
948 goto out_delete;
949 }
950
951 ret = perf_top__setup_sample_type(top);
952 if (ret)
953 goto out_delete;
954
955 if (perf_target__has_task(&opts->target))
956 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
957 perf_event__process,
958 &top->session->machines.host);
959 else
960 perf_event__synthesize_threads(&top->tool, perf_event__process,
961 &top->session->machines.host);
962
963 ret = perf_top__start_counters(top);
964 if (ret)
965 goto out_delete;
966
967 top->session->evlist = top->evlist;
968 perf_session__set_id_hdr_size(top->session);
969
970
971
972
973
974
975
976
977
978 if (!perf_target__none(&opts->target))
979 perf_evlist__enable(top->evlist);
980
981
982 poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
983
984 perf_top__mmap_read(top);
985
986 ret = -1;
987 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
988 display_thread), top)) {
989 ui__error("Could not create display thread.\n");
990 goto out_delete;
991 }
992
993 if (top->realtime_prio) {
994 struct sched_param param;
995
996 param.sched_priority = top->realtime_prio;
997 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
998 ui__error("Could not set realtime priority.\n");
999 goto out_delete;
1000 }
1001 }
1002
1003 while (!done) {
1004 u64 hits = top->samples;
1005
1006 perf_top__mmap_read(top);
1007
1008 if (hits == top->samples)
1009 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1010 }
1011
1012 ret = 0;
1013out_delete:
1014 perf_session__delete(top->session);
1015 top->session = NULL;
1016
1017 return ret;
1018}
1019
1020static int
1021callchain_opt(const struct option *opt, const char *arg, int unset)
1022{
1023 symbol_conf.use_callchain = true;
1024 return record_callchain_opt(opt, arg, unset);
1025}
1026
1027static int
1028parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1029{
1030 symbol_conf.use_callchain = true;
1031 return record_parse_callchain_opt(opt, arg, unset);
1032}
1033
1034static int
1035parse_percent_limit(const struct option *opt, const char *arg,
1036 int unset __maybe_unused)
1037{
1038 struct perf_top *top = opt->value;
1039
1040 top->min_percent = strtof(arg, NULL);
1041 return 0;
1042}
1043
1044int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1045{
1046 int status;
1047 char errbuf[BUFSIZ];
1048 struct perf_top top = {
1049 .count_filter = 5,
1050 .delay_secs = 2,
1051 .record_opts = {
1052 .mmap_pages = UINT_MAX,
1053 .user_freq = UINT_MAX,
1054 .user_interval = ULLONG_MAX,
1055 .freq = 4000,
1056 .target = {
1057 .uses_mmap = true,
1058 },
1059 },
1060 .sym_pcnt_filter = 5,
1061 };
1062 struct perf_record_opts *opts = &top.record_opts;
1063 struct perf_target *target = &opts->target;
1064 const struct option options[] = {
1065 OPT_CALLBACK('e', "event", &top.evlist, "event",
1066 "event selector. use 'perf list' to list available events",
1067 parse_events_option),
1068 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1069 OPT_STRING('p', "pid", &target->pid, "pid",
1070 "profile events on existing process id"),
1071 OPT_STRING('t', "tid", &target->tid, "tid",
1072 "profile events on existing thread id"),
1073 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1074 "system-wide collection from all CPUs"),
1075 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1076 "list of cpus to monitor"),
1077 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1078 "file", "vmlinux pathname"),
1079 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1080 "hide kernel symbols"),
1081 OPT_UINTEGER('m', "mmap-pages", &opts->mmap_pages,
1082 "number of mmap data pages"),
1083 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1084 "collect data with this RT SCHED_FIFO priority"),
1085 OPT_INTEGER('d', "delay", &top.delay_secs,
1086 "number of seconds to delay between refreshes"),
1087 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1088 "dump the symbol table used for profiling"),
1089 OPT_INTEGER('f', "count-filter", &top.count_filter,
1090 "only display functions with more events than this"),
1091 OPT_BOOLEAN('g', "group", &opts->group,
1092 "put the counters into a counter group"),
1093 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1094 "child tasks do not inherit counters"),
1095 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1096 "symbol to annotate"),
1097 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1098 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1099 OPT_INTEGER('E', "entries", &top.print_entries,
1100 "display this many functions"),
1101 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1102 "hide user symbols"),
1103 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1104 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1105 OPT_INCR('v', "verbose", &verbose,
1106 "be more verbose (show counter open errors, etc)"),
1107 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1108 "sort by key(s): pid, comm, dso, symbol, parent, weight, local_weight"),
1109 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1110 "Show a column with the number of samples"),
1111 OPT_CALLBACK_NOOPT('G', NULL, &top.record_opts,
1112 NULL, "enables call-graph recording",
1113 &callchain_opt),
1114 OPT_CALLBACK(0, "call-graph", &top.record_opts,
1115 "mode[,dump_size]", record_callchain_help,
1116 &parse_callchain_opt),
1117 OPT_CALLBACK(0, "ignore-callees", NULL, "regex",
1118 "ignore callees of these functions in call graphs",
1119 report_parse_ignore_callees_opt),
1120 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1121 "Show a column with the sum of periods"),
1122 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1123 "only consider symbols in these dsos"),
1124 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1125 "only consider symbols in these comms"),
1126 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1127 "only consider these symbols"),
1128 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1129 "Interleave source code with assembly code (default)"),
1130 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1131 "Display raw encoding of assembly instructions (default)"),
1132 OPT_STRING(0, "objdump", &objdump_path, "path",
1133 "objdump binary to use for disassembly and annotations"),
1134 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1135 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1136 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1137 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1138 "Don't show entries under that percent", parse_percent_limit),
1139 OPT_END()
1140 };
1141 const char * const top_usage[] = {
1142 "perf top [<options>]",
1143 NULL
1144 };
1145
1146 top.evlist = perf_evlist__new();
1147 if (top.evlist == NULL)
1148 return -ENOMEM;
1149
1150 argc = parse_options(argc, argv, options, top_usage, 0);
1151 if (argc)
1152 usage_with_options(top_usage, options);
1153
1154 if (sort_order == default_sort_order)
1155 sort_order = "dso,symbol";
1156
1157 if (setup_sorting() < 0)
1158 usage_with_options(top_usage, options);
1159
1160
1161 sort__need_collapse = 1;
1162
1163 if (top.use_stdio)
1164 use_browser = 0;
1165 else if (top.use_tui)
1166 use_browser = 1;
1167
1168 setup_browser(false);
1169
1170 status = perf_target__validate(target);
1171 if (status) {
1172 perf_target__strerror(target, status, errbuf, BUFSIZ);
1173 ui__warning("%s", errbuf);
1174 }
1175
1176 status = perf_target__parse_uid(target);
1177 if (status) {
1178 int saved_errno = errno;
1179
1180 perf_target__strerror(target, status, errbuf, BUFSIZ);
1181 ui__error("%s", errbuf);
1182
1183 status = -saved_errno;
1184 goto out_delete_evlist;
1185 }
1186
1187 if (perf_target__none(target))
1188 target->system_wide = true;
1189
1190 if (perf_evlist__create_maps(top.evlist, target) < 0)
1191 usage_with_options(top_usage, options);
1192
1193 if (!top.evlist->nr_entries &&
1194 perf_evlist__add_default(top.evlist) < 0) {
1195 ui__error("Not enough memory for event selector list\n");
1196 goto out_delete_maps;
1197 }
1198
1199 symbol_conf.nr_events = top.evlist->nr_entries;
1200
1201 if (top.delay_secs < 1)
1202 top.delay_secs = 1;
1203
1204 if (opts->user_interval != ULLONG_MAX)
1205 opts->default_interval = opts->user_interval;
1206 if (opts->user_freq != UINT_MAX)
1207 opts->freq = opts->user_freq;
1208
1209
1210
1211
1212 if (opts->default_interval)
1213 opts->freq = 0;
1214 else if (opts->freq) {
1215 opts->default_interval = opts->freq;
1216 } else {
1217 ui__error("frequency and count are zero, aborting\n");
1218 status = -EINVAL;
1219 goto out_delete_maps;
1220 }
1221
1222 top.sym_evsel = perf_evlist__first(top.evlist);
1223
1224 symbol_conf.priv_size = sizeof(struct annotation);
1225
1226 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1227 if (symbol__init() < 0)
1228 return -1;
1229
1230 sort__setup_elide(stdout);
1231
1232 get_term_dimensions(&top.winsize);
1233 if (top.print_entries == 0) {
1234 struct sigaction act = {
1235 .sa_sigaction = perf_top__sig_winch,
1236 .sa_flags = SA_SIGINFO,
1237 };
1238 perf_top__update_print_entries(&top);
1239 sigaction(SIGWINCH, &act, NULL);
1240 }
1241
1242 status = __cmd_top(&top);
1243
1244out_delete_maps:
1245 perf_evlist__delete_maps(top.evlist);
1246out_delete_evlist:
1247 perf_evlist__delete(top.evlist);
1248
1249 return status;
1250}
1251
