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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
44#include "util/debug.h"
45
46#include <assert.h>
47#include <elf.h>
48#include <fcntl.h>
49
50#include <stdio.h>
51#include <termios.h>
52#include <unistd.h>
53#include <inttypes.h>
54
55#include <errno.h>
56#include <time.h>
57#include <sched.h>
58
59#include <sys/syscall.h>
60#include <sys/ioctl.h>
61#include <sys/poll.h>
62#include <sys/prctl.h>
63#include <sys/wait.h>
64#include <sys/uio.h>
65#include <sys/utsname.h>
66#include <sys/mman.h>
67
68#include <linux/unistd.h>
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 pr_err("Can't annotate %s: No vmlinux file was found in the "
107 "path\n", sym->name);
108 sleep(1);
109 return -1;
110 }
111
112 notes = symbol__annotation(sym);
113 if (notes->src != NULL) {
114 pthread_mutex_lock(¬es->lock);
115 goto out_assign;
116 }
117
118 pthread_mutex_lock(¬es->lock);
119
120 if (symbol__alloc_hist(sym) < 0) {
121 pthread_mutex_unlock(¬es->lock);
122 pr_err("Not enough memory for annotating '%s' symbol!\n",
123 sym->name);
124 sleep(1);
125 return err;
126 }
127
128 err = symbol__annotate(sym, map, 0);
129 if (err == 0) {
130out_assign:
131 top->sym_filter_entry = he;
132 }
133
134 pthread_mutex_unlock(¬es->lock);
135 return err;
136}
137
138static void __zero_source_counters(struct hist_entry *he)
139{
140 struct symbol *sym = he->ms.sym;
141 symbol__annotate_zero_histograms(sym);
142}
143
144static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
145{
146 struct utsname uts;
147 int err = uname(&uts);
148
149 ui__warning("Out of bounds address found:\n\n"
150 "Addr: %" PRIx64 "\n"
151 "DSO: %s %c\n"
152 "Map: %" PRIx64 "-%" PRIx64 "\n"
153 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
154 "Arch: %s\n"
155 "Kernel: %s\n"
156 "Tools: %s\n\n"
157 "Not all samples will be on the annotation output.\n\n"
158 "Please report to linux-kernel@vger.kernel.org\n",
159 ip, map->dso->long_name, dso__symtab_origin(map->dso),
160 map->start, map->end, sym->start, sym->end,
161 sym->binding == STB_GLOBAL ? 'g' :
162 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
163 err ? "[unknown]" : uts.machine,
164 err ? "[unknown]" : uts.release, perf_version_string);
165 if (use_browser <= 0)
166 sleep(5);
167
168 map->erange_warned = true;
169}
170
171static void perf_top__record_precise_ip(struct perf_top *top,
172 struct hist_entry *he,
173 int counter, u64 ip)
174{
175 struct annotation *notes;
176 struct symbol *sym;
177 int err;
178
179 if (he == NULL || he->ms.sym == NULL ||
180 ((top->sym_filter_entry == NULL ||
181 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
182 return;
183
184 sym = he->ms.sym;
185 notes = symbol__annotation(sym);
186
187 if (pthread_mutex_trylock(¬es->lock))
188 return;
189
190 if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
191 pthread_mutex_unlock(¬es->lock);
192 pr_err("Not enough memory for annotating '%s' symbol!\n",
193 sym->name);
194 sleep(1);
195 return;
196 }
197
198 ip = he->ms.map->map_ip(he->ms.map, ip);
199 err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
200
201 pthread_mutex_unlock(¬es->lock);
202
203 if (err == -ERANGE && !he->ms.map->erange_warned)
204 ui__warn_map_erange(he->ms.map, sym, ip);
205}
206
207static void perf_top__show_details(struct perf_top *top)
208{
209 struct hist_entry *he = top->sym_filter_entry;
210 struct annotation *notes;
211 struct symbol *symbol;
212 int more;
213
214 if (!he)
215 return;
216
217 symbol = he->ms.sym;
218 notes = symbol__annotation(symbol);
219
220 pthread_mutex_lock(¬es->lock);
221
222 if (notes->src == NULL)
223 goto out_unlock;
224
225 printf("Showing %s for %s\n", perf_evsel__name(top->sym_evsel), symbol->name);
226 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
227
228 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel,
229 0, top->sym_pcnt_filter, top->print_entries, 4);
230 if (top->zero)
231 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
232 else
233 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
234 if (more != 0)
235 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
236out_unlock:
237 pthread_mutex_unlock(¬es->lock);
238}
239
240static const char CONSOLE_CLEAR[] = "[H[2J";
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 = event->ip.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, event->ip.pid)) {
703 pr_err("Can't find guest [%d]'s kernel information\n",
704 event->ip.pid);
705 intlist__add(seen, event->ip.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,
720 symbol_filter) < 0 ||
721 al.filtered)
722 return;
723
724 if (!top->kptr_restrict_warned &&
725 symbol_conf.kptr_restrict &&
726 al.cpumode == PERF_RECORD_MISC_KERNEL) {
727 ui__warning(
728"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
729"Check /proc/sys/kernel/kptr_restrict.\n\n"
730"Kernel%s samples will not be resolved.\n",
731 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
732 " modules" : "");
733 if (use_browser <= 0)
734 sleep(5);
735 top->kptr_restrict_warned = true;
736 }
737
738 if (al.sym == NULL) {
739 const char *msg = "Kernel samples will not be resolved.\n";
740
741
742
743
744
745
746
747
748
749
750
751 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
752 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
753 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
754 if (symbol_conf.vmlinux_name) {
755 ui__warning("The %s file can't be used.\n%s",
756 symbol_conf.vmlinux_name, msg);
757 } else {
758 ui__warning("A vmlinux file was not found.\n%s",
759 msg);
760 }
761
762 if (use_browser <= 0)
763 sleep(5);
764 top->vmlinux_warned = true;
765 }
766 }
767
768 if (al.sym == NULL || !al.sym->ignore) {
769 struct hist_entry *he;
770
771 if ((sort__has_parent || symbol_conf.use_callchain) &&
772 sample->callchain) {
773 err = machine__resolve_callchain(machine, evsel,
774 al.thread, sample,
775 &parent);
776
777 if (err)
778 return;
779 }
780
781 he = perf_evsel__add_hist_entry(evsel, &al, sample);
782 if (he == NULL) {
783 pr_err("Problem incrementing symbol period, skipping event\n");
784 return;
785 }
786
787 if (symbol_conf.use_callchain) {
788 err = callchain_append(he->callchain, &callchain_cursor,
789 sample->period);
790 if (err)
791 return;
792 }
793
794 if (sort__has_sym)
795 perf_top__record_precise_ip(top, he, evsel->idx, ip);
796 }
797
798 return;
799}
800
801static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
802{
803 struct perf_sample sample;
804 struct perf_evsel *evsel;
805 struct perf_session *session = top->session;
806 union perf_event *event;
807 struct machine *machine;
808 u8 origin;
809 int ret;
810
811 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
812 ret = perf_evlist__parse_sample(top->evlist, event, &sample);
813 if (ret) {
814 pr_err("Can't parse sample, err = %d\n", ret);
815 continue;
816 }
817
818 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
819 assert(evsel != NULL);
820
821 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
822
823 if (event->header.type == PERF_RECORD_SAMPLE)
824 ++top->samples;
825
826 switch (origin) {
827 case PERF_RECORD_MISC_USER:
828 ++top->us_samples;
829 if (top->hide_user_symbols)
830 continue;
831 machine = &session->machines.host;
832 break;
833 case PERF_RECORD_MISC_KERNEL:
834 ++top->kernel_samples;
835 if (top->hide_kernel_symbols)
836 continue;
837 machine = &session->machines.host;
838 break;
839 case PERF_RECORD_MISC_GUEST_KERNEL:
840 ++top->guest_kernel_samples;
841 machine = perf_session__find_machine(session, event->ip.pid);
842 break;
843 case PERF_RECORD_MISC_GUEST_USER:
844 ++top->guest_us_samples;
845
846
847
848
849
850 default:
851 continue;
852 }
853
854
855 if (event->header.type == PERF_RECORD_SAMPLE) {
856 perf_event__process_sample(&top->tool, event, evsel,
857 &sample, machine);
858 } else if (event->header.type < PERF_RECORD_MAX) {
859 hists__inc_nr_events(&evsel->hists, event->header.type);
860 machine__process_event(machine, event);
861 } else
862 ++session->stats.nr_unknown_events;
863 }
864}
865
866static void perf_top__mmap_read(struct perf_top *top)
867{
868 int i;
869
870 for (i = 0; i < top->evlist->nr_mmaps; i++)
871 perf_top__mmap_read_idx(top, i);
872}
873
874static int perf_top__start_counters(struct perf_top *top)
875{
876 char msg[512];
877 struct perf_evsel *counter;
878 struct perf_evlist *evlist = top->evlist;
879 struct perf_record_opts *opts = &top->record_opts;
880
881 perf_evlist__config(evlist, opts);
882
883 list_for_each_entry(counter, &evlist->entries, node) {
884try_again:
885 if (perf_evsel__open(counter, top->evlist->cpus,
886 top->evlist->threads) < 0) {
887 if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
888 if (verbose)
889 ui__warning("%s\n", msg);
890 goto try_again;
891 }
892
893 perf_evsel__open_strerror(counter, &opts->target,
894 errno, msg, sizeof(msg));
895 ui__error("%s\n", msg);
896 goto out_err;
897 }
898 }
899
900 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
901 ui__error("Failed to mmap with %d (%s)\n",
902 errno, strerror(errno));
903 goto out_err;
904 }
905
906 return 0;
907
908out_err:
909 return -1;
910}
911
912static int perf_top__setup_sample_type(struct perf_top *top __maybe_unused)
913{
914 if (!sort__has_sym) {
915 if (symbol_conf.use_callchain) {
916 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
917 return -EINVAL;
918 }
919 } else if (callchain_param.mode != CHAIN_NONE) {
920 if (callchain_register_param(&callchain_param) < 0) {
921 ui__error("Can't register callchain params.\n");
922 return -EINVAL;
923 }
924 }
925
926 return 0;
927}
928
929static int __cmd_top(struct perf_top *top)
930{
931 struct perf_record_opts *opts = &top->record_opts;
932 pthread_t thread;
933 int ret;
934
935
936
937
938 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
939 if (top->session == NULL)
940 return -ENOMEM;
941
942 ret = perf_top__setup_sample_type(top);
943 if (ret)
944 goto out_delete;
945
946 if (perf_target__has_task(&opts->target))
947 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
948 perf_event__process,
949 &top->session->machines.host);
950 else
951 perf_event__synthesize_threads(&top->tool, perf_event__process,
952 &top->session->machines.host);
953
954 ret = perf_top__start_counters(top);
955 if (ret)
956 goto out_delete;
957
958 top->session->evlist = top->evlist;
959 perf_session__set_id_hdr_size(top->session);
960
961
962
963
964
965
966
967
968
969 if (!perf_target__none(&opts->target))
970 perf_evlist__enable(top->evlist);
971
972
973 poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
974
975 perf_top__mmap_read(top);
976
977 ret = -1;
978 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
979 display_thread), top)) {
980 ui__error("Could not create display thread.\n");
981 goto out_delete;
982 }
983
984 if (top->realtime_prio) {
985 struct sched_param param;
986
987 param.sched_priority = top->realtime_prio;
988 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
989 ui__error("Could not set realtime priority.\n");
990 goto out_delete;
991 }
992 }
993
994 while (!done) {
995 u64 hits = top->samples;
996
997 perf_top__mmap_read(top);
998
999 if (hits == top->samples)
1000 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1001 }
1002
1003 ret = 0;
1004out_delete:
1005 perf_session__delete(top->session);
1006 top->session = NULL;
1007
1008 return ret;
1009}
1010
1011static int
1012parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1013{
1014
1015
1016
1017 if (unset)
1018 return 0;
1019
1020 symbol_conf.use_callchain = true;
1021
1022 return record_parse_callchain_opt(opt, arg, unset);
1023}
1024
1025static int
1026parse_percent_limit(const struct option *opt, const char *arg,
1027 int unset __maybe_unused)
1028{
1029 struct perf_top *top = opt->value;
1030
1031 top->min_percent = strtof(arg, NULL);
1032 return 0;
1033}
1034
1035int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
1036{
1037 int status;
1038 char errbuf[BUFSIZ];
1039 struct perf_top top = {
1040 .count_filter = 5,
1041 .delay_secs = 2,
1042 .record_opts = {
1043 .mmap_pages = UINT_MAX,
1044 .user_freq = UINT_MAX,
1045 .user_interval = ULLONG_MAX,
1046 .freq = 4000,
1047 .target = {
1048 .uses_mmap = true,
1049 },
1050 },
1051 .sym_pcnt_filter = 5,
1052 };
1053 struct perf_record_opts *opts = &top.record_opts;
1054 struct perf_target *target = &opts->target;
1055 const struct option options[] = {
1056 OPT_CALLBACK('e', "event", &top.evlist, "event",
1057 "event selector. use 'perf list' to list available events",
1058 parse_events_option),
1059 OPT_U64('c', "count", &opts->user_interval, "event period to sample"),
1060 OPT_STRING('p', "pid", &target->pid, "pid",
1061 "profile events on existing process id"),
1062 OPT_STRING('t', "tid", &target->tid, "tid",
1063 "profile events on existing thread id"),
1064 OPT_BOOLEAN('a', "all-cpus", &target->system_wide,
1065 "system-wide collection from all CPUs"),
1066 OPT_STRING('C', "cpu", &target->cpu_list, "cpu",
1067 "list of cpus to monitor"),
1068 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1069 "file", "vmlinux pathname"),
1070 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1071 "hide kernel symbols"),
1072 OPT_UINTEGER('m', "mmap-pages", &opts->mmap_pages,
1073 "number of mmap data pages"),
1074 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1075 "collect data with this RT SCHED_FIFO priority"),
1076 OPT_INTEGER('d', "delay", &top.delay_secs,
1077 "number of seconds to delay between refreshes"),
1078 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1079 "dump the symbol table used for profiling"),
1080 OPT_INTEGER('f', "count-filter", &top.count_filter,
1081 "only display functions with more events than this"),
1082 OPT_BOOLEAN('g', "group", &opts->group,
1083 "put the counters into a counter group"),
1084 OPT_BOOLEAN('i', "no-inherit", &opts->no_inherit,
1085 "child tasks do not inherit counters"),
1086 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1087 "symbol to annotate"),
1088 OPT_BOOLEAN('z', "zero", &top.zero, "zero history across updates"),
1089 OPT_UINTEGER('F', "freq", &opts->user_freq, "profile at this frequency"),
1090 OPT_INTEGER('E', "entries", &top.print_entries,
1091 "display this many functions"),
1092 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1093 "hide user symbols"),
1094 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1095 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1096 OPT_INCR('v', "verbose", &verbose,
1097 "be more verbose (show counter open errors, etc)"),
1098 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1099 "sort by key(s): pid, comm, dso, symbol, parent, weight, local_weight"),
1100 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1101 "Show a column with the number of samples"),
1102 OPT_CALLBACK_DEFAULT('G', "call-graph", &top.record_opts,
1103 "mode[,dump_size]", record_callchain_help,
1104 &parse_callchain_opt, "fp"),
1105 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1106 "Show a column with the sum of periods"),
1107 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1108 "only consider symbols in these dsos"),
1109 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1110 "only consider symbols in these comms"),
1111 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1112 "only consider these symbols"),
1113 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1114 "Interleave source code with assembly code (default)"),
1115 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1116 "Display raw encoding of assembly instructions (default)"),
1117 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1118 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1119 OPT_STRING('u', "uid", &target->uid_str, "user", "user to profile"),
1120 OPT_CALLBACK(0, "percent-limit", &top, "percent",
1121 "Don't show entries under that percent", parse_percent_limit),
1122 OPT_END()
1123 };
1124 const char * const top_usage[] = {
1125 "perf top [<options>]",
1126 NULL
1127 };
1128
1129 top.evlist = perf_evlist__new();
1130 if (top.evlist == NULL)
1131 return -ENOMEM;
1132
1133 argc = parse_options(argc, argv, options, top_usage, 0);
1134 if (argc)
1135 usage_with_options(top_usage, options);
1136
1137 if (sort_order == default_sort_order)
1138 sort_order = "dso,symbol";
1139
1140 if (setup_sorting() < 0)
1141 usage_with_options(top_usage, options);
1142
1143
1144 sort__need_collapse = 1;
1145
1146 if (top.use_stdio)
1147 use_browser = 0;
1148 else if (top.use_tui)
1149 use_browser = 1;
1150
1151 setup_browser(false);
1152
1153 status = perf_target__validate(target);
1154 if (status) {
1155 perf_target__strerror(target, status, errbuf, BUFSIZ);
1156 ui__warning("%s", errbuf);
1157 }
1158
1159 status = perf_target__parse_uid(target);
1160 if (status) {
1161 int saved_errno = errno;
1162
1163 perf_target__strerror(target, status, errbuf, BUFSIZ);
1164 ui__error("%s", errbuf);
1165
1166 status = -saved_errno;
1167 goto out_delete_evlist;
1168 }
1169
1170 if (perf_target__none(target))
1171 target->system_wide = true;
1172
1173 if (perf_evlist__create_maps(top.evlist, target) < 0)
1174 usage_with_options(top_usage, options);
1175
1176 if (!top.evlist->nr_entries &&
1177 perf_evlist__add_default(top.evlist) < 0) {
1178 ui__error("Not enough memory for event selector list\n");
1179 goto out_delete_maps;
1180 }
1181
1182 symbol_conf.nr_events = top.evlist->nr_entries;
1183
1184 if (top.delay_secs < 1)
1185 top.delay_secs = 1;
1186
1187 if (opts->user_interval != ULLONG_MAX)
1188 opts->default_interval = opts->user_interval;
1189 if (opts->user_freq != UINT_MAX)
1190 opts->freq = opts->user_freq;
1191
1192
1193
1194
1195 if (opts->default_interval)
1196 opts->freq = 0;
1197 else if (opts->freq) {
1198 opts->default_interval = opts->freq;
1199 } else {
1200 ui__error("frequency and count are zero, aborting\n");
1201 status = -EINVAL;
1202 goto out_delete_maps;
1203 }
1204
1205 top.sym_evsel = perf_evlist__first(top.evlist);
1206
1207 symbol_conf.priv_size = sizeof(struct annotation);
1208
1209 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1210 if (symbol__init() < 0)
1211 return -1;
1212
1213 sort__setup_elide(stdout);
1214
1215 get_term_dimensions(&top.winsize);
1216 if (top.print_entries == 0) {
1217 struct sigaction act = {
1218 .sa_sigaction = perf_top__sig_winch,
1219 .sa_flags = SA_SIGINFO,
1220 };
1221 perf_top__update_print_entries(&top);
1222 sigaction(SIGWINCH, &act, NULL);
1223 }
1224
1225 status = __cmd_top(&top);
1226
1227out_delete_maps:
1228 perf_evlist__delete_maps(top.evlist);
1229out_delete_evlist:
1230 perf_evlist__delete(top.evlist);
1231
1232 return status;
1233}
1234
