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1/*
2 * builtin-top.c
3 *
4 * Builtin top command: Display a continuously updated profile of
5 * any workload, CPU or specific PID.
6 *
7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
8 * 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
9 *
10 * Improvements and fixes by:
11 *
12 * Arjan van de Ven <arjan@linux.intel.com>
13 * Yanmin Zhang <yanmin.zhang@intel.com>
14 * Wu Fengguang <fengguang.wu@intel.com>
15 * Mike Galbraith <efault@gmx.de>
16 * Paul Mackerras <paulus@samba.org>
17 *
18 * Released under the GPL v2. (and only v2, not any later version)
19 */
20#include "builtin.h"
21
22#include "perf.h"
23
24#include "util/annotate.h"
25#include "util/cache.h"
26#include "util/color.h"
27#include "util/evlist.h"
28#include "util/evsel.h"
29#include "util/session.h"
30#include "util/symbol.h"
31#include "util/thread.h"
32#include "util/thread_map.h"
33#include "util/top.h"
34#include "util/util.h"
35#include <linux/rbtree.h>
36#include "util/parse-options.h"
37#include "util/parse-events.h"
38#include "util/cpumap.h"
39#include "util/xyarray.h"
40#include "util/sort.h"
41
42#include "util/debug.h"
43
44#include <assert.h>
45#include <elf.h>
46#include <fcntl.h>
47
48#include <stdio.h>
49#include <termios.h>
50#include <unistd.h>
51#include <inttypes.h>
52
53#include <errno.h>
54#include <time.h>
55#include <sched.h>
56
57#include <sys/syscall.h>
58#include <sys/ioctl.h>
59#include <sys/poll.h>
60#include <sys/prctl.h>
61#include <sys/wait.h>
62#include <sys/uio.h>
63#include <sys/utsname.h>
64#include <sys/mman.h>
65
66#include <linux/unistd.h>
67#include <linux/types.h>
68
69void get_term_dimensions(struct winsize *ws)
70{
71 char *s = getenv("LINES");
72
73 if (s != NULL) {
74 ws->ws_row = atoi(s);
75 s = getenv("COLUMNS");
76 if (s != NULL) {
77 ws->ws_col = atoi(s);
78 if (ws->ws_row && ws->ws_col)
79 return;
80 }
81 }
82#ifdef TIOCGWINSZ
83 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
84 ws->ws_row && ws->ws_col)
85 return;
86#endif
87 ws->ws_row = 25;
88 ws->ws_col = 80;
89}
90
91static void perf_top__update_print_entries(struct perf_top *top)
92{
93 if (top->print_entries > 9)
94 top->print_entries -= 9;
95}
96
97static void perf_top__sig_winch(int sig __used, siginfo_t *info __used, void *arg)
98{
99 struct perf_top *top = arg;
100
101 get_term_dimensions(&top->winsize);
102 if (!top->print_entries
103 || (top->print_entries+4) > top->winsize.ws_row) {
104 top->print_entries = top->winsize.ws_row;
105 } else {
106 top->print_entries += 4;
107 top->winsize.ws_row = top->print_entries;
108 }
109 perf_top__update_print_entries(top);
110}
111
112static int perf_top__parse_source(struct perf_top *top, struct hist_entry *he)
113{
114 struct symbol *sym;
115 struct annotation *notes;
116 struct map *map;
117 int err = -1;
118
119 if (!he || !he->ms.sym)
120 return -1;
121
122 sym = he->ms.sym;
123 map = he->ms.map;
124
125 /*
126 * We can't annotate with just /proc/kallsyms
127 */
128 if (map->dso->symtab_type == SYMTAB__KALLSYMS) {
129 pr_err("Can't annotate %s: No vmlinux file was found in the "
130 "path\n", sym->name);
131 sleep(1);
132 return -1;
133 }
134
135 notes = symbol__annotation(sym);
136 if (notes->src != NULL) {
137 pthread_mutex_lock(¬es->lock);
138 goto out_assign;
139 }
140
141 pthread_mutex_lock(¬es->lock);
142
143 if (symbol__alloc_hist(sym) < 0) {
144 pthread_mutex_unlock(¬es->lock);
145 pr_err("Not enough memory for annotating '%s' symbol!\n",
146 sym->name);
147 sleep(1);
148 return err;
149 }
150
151 err = symbol__annotate(sym, map, 0);
152 if (err == 0) {
153out_assign:
154 top->sym_filter_entry = he;
155 }
156
157 pthread_mutex_unlock(¬es->lock);
158 return err;
159}
160
161static void __zero_source_counters(struct hist_entry *he)
162{
163 struct symbol *sym = he->ms.sym;
164 symbol__annotate_zero_histograms(sym);
165}
166
167static void ui__warn_map_erange(struct map *map, struct symbol *sym, u64 ip)
168{
169 struct utsname uts;
170 int err = uname(&uts);
171
172 ui__warning("Out of bounds address found:\n\n"
173 "Addr: %" PRIx64 "\n"
174 "DSO: %s %c\n"
175 "Map: %" PRIx64 "-%" PRIx64 "\n"
176 "Symbol: %" PRIx64 "-%" PRIx64 " %c %s\n"
177 "Arch: %s\n"
178 "Kernel: %s\n"
179 "Tools: %s\n\n"
180 "Not all samples will be on the annotation output.\n\n"
181 "Please report to linux-kernel@vger.kernel.org\n",
182 ip, map->dso->long_name, dso__symtab_origin(map->dso),
183 map->start, map->end, sym->start, sym->end,
184 sym->binding == STB_GLOBAL ? 'g' :
185 sym->binding == STB_LOCAL ? 'l' : 'w', sym->name,
186 err ? "[unknown]" : uts.machine,
187 err ? "[unknown]" : uts.release, perf_version_string);
188 if (use_browser <= 0)
189 sleep(5);
190
191 map->erange_warned = true;
192}
193
194static void perf_top__record_precise_ip(struct perf_top *top,
195 struct hist_entry *he,
196 int counter, u64 ip)
197{
198 struct annotation *notes;
199 struct symbol *sym;
200 int err;
201
202 if (he == NULL || he->ms.sym == NULL ||
203 ((top->sym_filter_entry == NULL ||
204 top->sym_filter_entry->ms.sym != he->ms.sym) && use_browser != 1))
205 return;
206
207 sym = he->ms.sym;
208 notes = symbol__annotation(sym);
209
210 if (pthread_mutex_trylock(¬es->lock))
211 return;
212
213 if (notes->src == NULL && symbol__alloc_hist(sym) < 0) {
214 pthread_mutex_unlock(¬es->lock);
215 pr_err("Not enough memory for annotating '%s' symbol!\n",
216 sym->name);
217 sleep(1);
218 return;
219 }
220
221 ip = he->ms.map->map_ip(he->ms.map, ip);
222 err = symbol__inc_addr_samples(sym, he->ms.map, counter, ip);
223
224 pthread_mutex_unlock(¬es->lock);
225
226 if (err == -ERANGE && !he->ms.map->erange_warned)
227 ui__warn_map_erange(he->ms.map, sym, ip);
228}
229
230static void perf_top__show_details(struct perf_top *top)
231{
232 struct hist_entry *he = top->sym_filter_entry;
233 struct annotation *notes;
234 struct symbol *symbol;
235 int more;
236
237 if (!he)
238 return;
239
240 symbol = he->ms.sym;
241 notes = symbol__annotation(symbol);
242
243 pthread_mutex_lock(¬es->lock);
244
245 if (notes->src == NULL)
246 goto out_unlock;
247
248 printf("Showing %s for %s\n", event_name(top->sym_evsel), symbol->name);
249 printf(" Events Pcnt (>=%d%%)\n", top->sym_pcnt_filter);
250
251 more = symbol__annotate_printf(symbol, he->ms.map, top->sym_evsel->idx,
252 0, top->sym_pcnt_filter, top->print_entries, 4);
253 if (top->zero)
254 symbol__annotate_zero_histogram(symbol, top->sym_evsel->idx);
255 else
256 symbol__annotate_decay_histogram(symbol, top->sym_evsel->idx);
257 if (more != 0)
258 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
259out_unlock:
260 pthread_mutex_unlock(¬es->lock);
261}
262
263static const char CONSOLE_CLEAR[] = "[H[2J";
264
265static struct hist_entry *perf_evsel__add_hist_entry(struct perf_evsel *evsel,
266 struct addr_location *al,
267 struct perf_sample *sample)
268{
269 struct hist_entry *he;
270
271 he = __hists__add_entry(&evsel->hists, al, NULL, sample->period);
272 if (he == NULL)
273 return NULL;
274
275 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
276 return he;
277}
278
279static void perf_top__print_sym_table(struct perf_top *top)
280{
281 char bf[160];
282 int printed = 0;
283 const int win_width = top->winsize.ws_col - 1;
284
285 puts(CONSOLE_CLEAR);
286
287 perf_top__header_snprintf(top, bf, sizeof(bf));
288 printf("%s\n", bf);
289
290 perf_top__reset_sample_counters(top);
291
292 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
293
294 if (top->sym_evsel->hists.stats.nr_lost_warned !=
295 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST]) {
296 top->sym_evsel->hists.stats.nr_lost_warned =
297 top->sym_evsel->hists.stats.nr_events[PERF_RECORD_LOST];
298 color_fprintf(stdout, PERF_COLOR_RED,
299 "WARNING: LOST %d chunks, Check IO/CPU overload",
300 top->sym_evsel->hists.stats.nr_lost_warned);
301 ++printed;
302 }
303
304 if (top->sym_filter_entry) {
305 perf_top__show_details(top);
306 return;
307 }
308
309 hists__collapse_resort_threaded(&top->sym_evsel->hists);
310 hists__output_resort_threaded(&top->sym_evsel->hists);
311 hists__decay_entries_threaded(&top->sym_evsel->hists,
312 top->hide_user_symbols,
313 top->hide_kernel_symbols);
314 hists__output_recalc_col_len(&top->sym_evsel->hists,
315 top->winsize.ws_row - 3);
316 putchar('\n');
317 hists__fprintf(&top->sym_evsel->hists, NULL, false, false,
318 top->winsize.ws_row - 4 - printed, win_width, stdout);
319}
320
321static void prompt_integer(int *target, const char *msg)
322{
323 char *buf = malloc(0), *p;
324 size_t dummy = 0;
325 int tmp;
326
327 fprintf(stdout, "\n%s: ", msg);
328 if (getline(&buf, &dummy, stdin) < 0)
329 return;
330
331 p = strchr(buf, '\n');
332 if (p)
333 *p = 0;
334
335 p = buf;
336 while(*p) {
337 if (!isdigit(*p))
338 goto out_free;
339 p++;
340 }
341 tmp = strtoul(buf, NULL, 10);
342 *target = tmp;
343out_free:
344 free(buf);
345}
346
347static void prompt_percent(int *target, const char *msg)
348{
349 int tmp = 0;
350
351 prompt_integer(&tmp, msg);
352 if (tmp >= 0 && tmp <= 100)
353 *target = tmp;
354}
355
356static void perf_top__prompt_symbol(struct perf_top *top, const char *msg)
357{
358 char *buf = malloc(0), *p;
359 struct hist_entry *syme = top->sym_filter_entry, *n, *found = NULL;
360 struct rb_node *next;
361 size_t dummy = 0;
362
363 /* zero counters of active symbol */
364 if (syme) {
365 __zero_source_counters(syme);
366 top->sym_filter_entry = NULL;
367 }
368
369 fprintf(stdout, "\n%s: ", msg);
370 if (getline(&buf, &dummy, stdin) < 0)
371 goto out_free;
372
373 p = strchr(buf, '\n');
374 if (p)
375 *p = 0;
376
377 next = rb_first(&top->sym_evsel->hists.entries);
378 while (next) {
379 n = rb_entry(next, struct hist_entry, rb_node);
380 if (n->ms.sym && !strcmp(buf, n->ms.sym->name)) {
381 found = n;
382 break;
383 }
384 next = rb_next(&n->rb_node);
385 }
386
387 if (!found) {
388 fprintf(stderr, "Sorry, %s is not active.\n", buf);
389 sleep(1);
390 } else
391 perf_top__parse_source(top, found);
392
393out_free:
394 free(buf);
395}
396
397static void perf_top__print_mapped_keys(struct perf_top *top)
398{
399 char *name = NULL;
400
401 if (top->sym_filter_entry) {
402 struct symbol *sym = top->sym_filter_entry->ms.sym;
403 name = sym->name;
404 }
405
406 fprintf(stdout, "\nMapped keys:\n");
407 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top->delay_secs);
408 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top->print_entries);
409
410 if (top->evlist->nr_entries > 1)
411 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top->sym_evsel));
412
413 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top->count_filter);
414
415 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", top->sym_pcnt_filter);
416 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
417 fprintf(stdout, "\t[S] stop annotation.\n");
418
419 fprintf(stdout,
420 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
421 top->hide_kernel_symbols ? "yes" : "no");
422 fprintf(stdout,
423 "\t[U] hide user symbols. \t(%s)\n",
424 top->hide_user_symbols ? "yes" : "no");
425 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top->zero ? 1 : 0);
426 fprintf(stdout, "\t[qQ] quit.\n");
427}
428
429static int perf_top__key_mapped(struct perf_top *top, int c)
430{
431 switch (c) {
432 case 'd':
433 case 'e':
434 case 'f':
435 case 'z':
436 case 'q':
437 case 'Q':
438 case 'K':
439 case 'U':
440 case 'F':
441 case 's':
442 case 'S':
443 return 1;
444 case 'E':
445 return top->evlist->nr_entries > 1 ? 1 : 0;
446 default:
447 break;
448 }
449
450 return 0;
451}
452
453static void perf_top__handle_keypress(struct perf_top *top, int c)
454{
455 if (!perf_top__key_mapped(top, c)) {
456 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
457 struct termios tc, save;
458
459 perf_top__print_mapped_keys(top);
460 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
461 fflush(stdout);
462
463 tcgetattr(0, &save);
464 tc = save;
465 tc.c_lflag &= ~(ICANON | ECHO);
466 tc.c_cc[VMIN] = 0;
467 tc.c_cc[VTIME] = 0;
468 tcsetattr(0, TCSANOW, &tc);
469
470 poll(&stdin_poll, 1, -1);
471 c = getc(stdin);
472
473 tcsetattr(0, TCSAFLUSH, &save);
474 if (!perf_top__key_mapped(top, c))
475 return;
476 }
477
478 switch (c) {
479 case 'd':
480 prompt_integer(&top->delay_secs, "Enter display delay");
481 if (top->delay_secs < 1)
482 top->delay_secs = 1;
483 break;
484 case 'e':
485 prompt_integer(&top->print_entries, "Enter display entries (lines)");
486 if (top->print_entries == 0) {
487 struct sigaction act = {
488 .sa_sigaction = perf_top__sig_winch,
489 .sa_flags = SA_SIGINFO,
490 };
491 perf_top__sig_winch(SIGWINCH, NULL, top);
492 sigaction(SIGWINCH, &act, NULL);
493 } else {
494 perf_top__sig_winch(SIGWINCH, NULL, top);
495 signal(SIGWINCH, SIG_DFL);
496 }
497 break;
498 case 'E':
499 if (top->evlist->nr_entries > 1) {
500 /* Select 0 as the default event: */
501 int counter = 0;
502
503 fprintf(stderr, "\nAvailable events:");
504
505 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
506 fprintf(stderr, "\n\t%d %s", top->sym_evsel->idx, event_name(top->sym_evsel));
507
508 prompt_integer(&counter, "Enter details event counter");
509
510 if (counter >= top->evlist->nr_entries) {
511 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
512 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top->sym_evsel));
513 sleep(1);
514 break;
515 }
516 list_for_each_entry(top->sym_evsel, &top->evlist->entries, node)
517 if (top->sym_evsel->idx == counter)
518 break;
519 } else
520 top->sym_evsel = list_entry(top->evlist->entries.next, struct perf_evsel, node);
521 break;
522 case 'f':
523 prompt_integer(&top->count_filter, "Enter display event count filter");
524 break;
525 case 'F':
526 prompt_percent(&top->sym_pcnt_filter,
527 "Enter details display event filter (percent)");
528 break;
529 case 'K':
530 top->hide_kernel_symbols = !top->hide_kernel_symbols;
531 break;
532 case 'q':
533 case 'Q':
534 printf("exiting.\n");
535 if (top->dump_symtab)
536 perf_session__fprintf_dsos(top->session, stderr);
537 exit(0);
538 case 's':
539 perf_top__prompt_symbol(top, "Enter details symbol");
540 break;
541 case 'S':
542 if (!top->sym_filter_entry)
543 break;
544 else {
545 struct hist_entry *syme = top->sym_filter_entry;
546
547 top->sym_filter_entry = NULL;
548 __zero_source_counters(syme);
549 }
550 break;
551 case 'U':
552 top->hide_user_symbols = !top->hide_user_symbols;
553 break;
554 case 'z':
555 top->zero = !top->zero;
556 break;
557 default:
558 break;
559 }
560}
561
562static void perf_top__sort_new_samples(void *arg)
563{
564 struct perf_top *t = arg;
565 perf_top__reset_sample_counters(t);
566
567 if (t->evlist->selected != NULL)
568 t->sym_evsel = t->evlist->selected;
569
570 hists__collapse_resort_threaded(&t->sym_evsel->hists);
571 hists__output_resort_threaded(&t->sym_evsel->hists);
572 hists__decay_entries_threaded(&t->sym_evsel->hists,
573 t->hide_user_symbols,
574 t->hide_kernel_symbols);
575}
576
577static void *display_thread_tui(void *arg)
578{
579 struct perf_evsel *pos;
580 struct perf_top *top = arg;
581 const char *help = "For a higher level overview, try: perf top --sort comm,dso";
582
583 perf_top__sort_new_samples(top);
584
585 /*
586 * Initialize the uid_filter_str, in the future the TUI will allow
587 * Zooming in/out UIDs. For now juse use whatever the user passed
588 * via --uid.
589 */
590 list_for_each_entry(pos, &top->evlist->entries, node)
591 pos->hists.uid_filter_str = top->target.uid_str;
592
593 perf_evlist__tui_browse_hists(top->evlist, help,
594 perf_top__sort_new_samples,
595 top, top->delay_secs);
596
597 exit_browser(0);
598 exit(0);
599 return NULL;
600}
601
602static void *display_thread(void *arg)
603{
604 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
605 struct termios tc, save;
606 struct perf_top *top = arg;
607 int delay_msecs, c;
608
609 tcgetattr(0, &save);
610 tc = save;
611 tc.c_lflag &= ~(ICANON | ECHO);
612 tc.c_cc[VMIN] = 0;
613 tc.c_cc[VTIME] = 0;
614
615 pthread__unblock_sigwinch();
616repeat:
617 delay_msecs = top->delay_secs * 1000;
618 tcsetattr(0, TCSANOW, &tc);
619 /* trash return*/
620 getc(stdin);
621
622 while (1) {
623 perf_top__print_sym_table(top);
624 /*
625 * Either timeout expired or we got an EINTR due to SIGWINCH,
626 * refresh screen in both cases.
627 */
628 switch (poll(&stdin_poll, 1, delay_msecs)) {
629 case 0:
630 continue;
631 case -1:
632 if (errno == EINTR)
633 continue;
634 /* Fall trhu */
635 default:
636 goto process_hotkey;
637 }
638 }
639process_hotkey:
640 c = getc(stdin);
641 tcsetattr(0, TCSAFLUSH, &save);
642
643 perf_top__handle_keypress(top, c);
644 goto repeat;
645
646 return NULL;
647}
648
649/* Tag samples to be skipped. */
650static const char *skip_symbols[] = {
651 "intel_idle",
652 "default_idle",
653 "native_safe_halt",
654 "cpu_idle",
655 "enter_idle",
656 "exit_idle",
657 "mwait_idle",
658 "mwait_idle_with_hints",
659 "poll_idle",
660 "ppc64_runlatch_off",
661 "pseries_dedicated_idle_sleep",
662 NULL
663};
664
665static int symbol_filter(struct map *map __used, struct symbol *sym)
666{
667 const char *name = sym->name;
668 int i;
669
670 /*
671 * ppc64 uses function descriptors and appends a '.' to the
672 * start of every instruction address. Remove it.
673 */
674 if (name[0] == '.')
675 name++;
676
677 if (!strcmp(name, "_text") ||
678 !strcmp(name, "_etext") ||
679 !strcmp(name, "_sinittext") ||
680 !strncmp("init_module", name, 11) ||
681 !strncmp("cleanup_module", name, 14) ||
682 strstr(name, "_text_start") ||
683 strstr(name, "_text_end"))
684 return 1;
685
686 for (i = 0; skip_symbols[i]; i++) {
687 if (!strcmp(skip_symbols[i], name)) {
688 sym->ignore = true;
689 break;
690 }
691 }
692
693 return 0;
694}
695
696static void perf_event__process_sample(struct perf_tool *tool,
697 const union perf_event *event,
698 struct perf_evsel *evsel,
699 struct perf_sample *sample,
700 struct machine *machine)
701{
702 struct perf_top *top = container_of(tool, struct perf_top, tool);
703 struct symbol *parent = NULL;
704 u64 ip = event->ip.ip;
705 struct addr_location al;
706 int err;
707
708 if (!machine && perf_guest) {
709 pr_err("Can't find guest [%d]'s kernel information\n",
710 event->ip.pid);
711 return;
712 }
713
714 if (!machine) {
715 pr_err("%u unprocessable samples recorded.",
716 top->session->hists.stats.nr_unprocessable_samples++);
717 return;
718 }
719
720 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
721 top->exact_samples++;
722
723 if (perf_event__preprocess_sample(event, machine, &al, sample,
724 symbol_filter) < 0 ||
725 al.filtered)
726 return;
727
728 if (!top->kptr_restrict_warned &&
729 symbol_conf.kptr_restrict &&
730 al.cpumode == PERF_RECORD_MISC_KERNEL) {
731 ui__warning(
732"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
733"Check /proc/sys/kernel/kptr_restrict.\n\n"
734"Kernel%s samples will not be resolved.\n",
735 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
736 " modules" : "");
737 if (use_browser <= 0)
738 sleep(5);
739 top->kptr_restrict_warned = true;
740 }
741
742 if (al.sym == NULL) {
743 const char *msg = "Kernel samples will not be resolved.\n";
744 /*
745 * As we do lazy loading of symtabs we only will know if the
746 * specified vmlinux file is invalid when we actually have a
747 * hit in kernel space and then try to load it. So if we get
748 * here and there are _no_ symbols in the DSO backing the
749 * kernel map, bail out.
750 *
751 * We may never get here, for instance, if we use -K/
752 * --hide-kernel-symbols, even if the user specifies an
753 * invalid --vmlinux ;-)
754 */
755 if (!top->kptr_restrict_warned && !top->vmlinux_warned &&
756 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
757 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
758 if (symbol_conf.vmlinux_name) {
759 ui__warning("The %s file can't be used.\n%s",
760 symbol_conf.vmlinux_name, msg);
761 } else {
762 ui__warning("A vmlinux file was not found.\n%s",
763 msg);
764 }
765
766 if (use_browser <= 0)
767 sleep(5);
768 top->vmlinux_warned = true;
769 }
770 }
771
772 if (al.sym == NULL || !al.sym->ignore) {
773 struct hist_entry *he;
774
775 if ((sort__has_parent || symbol_conf.use_callchain) &&
776 sample->callchain) {
777 err = machine__resolve_callchain(machine, evsel, al.thread,
778 sample->callchain, &parent);
779 if (err)
780 return;
781 }
782
783 he = perf_evsel__add_hist_entry(evsel, &al, sample);
784 if (he == NULL) {
785 pr_err("Problem incrementing symbol period, skipping event\n");
786 return;
787 }
788
789 if (symbol_conf.use_callchain) {
790 err = callchain_append(he->callchain, &callchain_cursor,
791 sample->period);
792 if (err)
793 return;
794 }
795
796 if (top->sort_has_symbols)
797 perf_top__record_precise_ip(top, he, evsel->idx, ip);
798 }
799
800 return;
801}
802
803static void perf_top__mmap_read_idx(struct perf_top *top, int idx)
804{
805 struct perf_sample sample;
806 struct perf_evsel *evsel;
807 struct perf_session *session = top->session;
808 union perf_event *event;
809 struct machine *machine;
810 u8 origin;
811 int ret;
812
813 while ((event = perf_evlist__mmap_read(top->evlist, idx)) != NULL) {
814 ret = perf_session__parse_sample(session, event, &sample);
815 if (ret) {
816 pr_err("Can't parse sample, err = %d\n", ret);
817 continue;
818 }
819
820 evsel = perf_evlist__id2evsel(session->evlist, sample.id);
821 assert(evsel != NULL);
822
823 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
824
825 if (event->header.type == PERF_RECORD_SAMPLE)
826 ++top->samples;
827
828 switch (origin) {
829 case PERF_RECORD_MISC_USER:
830 ++top->us_samples;
831 if (top->hide_user_symbols)
832 continue;
833 machine = perf_session__find_host_machine(session);
834 break;
835 case PERF_RECORD_MISC_KERNEL:
836 ++top->kernel_samples;
837 if (top->hide_kernel_symbols)
838 continue;
839 machine = perf_session__find_host_machine(session);
840 break;
841 case PERF_RECORD_MISC_GUEST_KERNEL:
842 ++top->guest_kernel_samples;
843 machine = perf_session__find_machine(session, event->ip.pid);
844 break;
845 case PERF_RECORD_MISC_GUEST_USER:
846 ++top->guest_us_samples;
847 /*
848 * TODO: we don't process guest user from host side
849 * except simple counting.
850 */
851 /* Fall thru */
852 default:
853 continue;
854 }
855
856
857 if (event->header.type == PERF_RECORD_SAMPLE) {
858 perf_event__process_sample(&top->tool, event, evsel,
859 &sample, machine);
860 } else if (event->header.type < PERF_RECORD_MAX) {
861 hists__inc_nr_events(&evsel->hists, event->header.type);
862 perf_event__process(&top->tool, event, &sample, machine);
863 } else
864 ++session->hists.stats.nr_unknown_events;
865 }
866}
867
868static void perf_top__mmap_read(struct perf_top *top)
869{
870 int i;
871
872 for (i = 0; i < top->evlist->nr_mmaps; i++)
873 perf_top__mmap_read_idx(top, i);
874}
875
876static void perf_top__start_counters(struct perf_top *top)
877{
878 struct perf_evsel *counter, *first;
879 struct perf_evlist *evlist = top->evlist;
880
881 first = list_entry(evlist->entries.next, struct perf_evsel, node);
882
883 list_for_each_entry(counter, &evlist->entries, node) {
884 struct perf_event_attr *attr = &counter->attr;
885 struct xyarray *group_fd = NULL;
886
887 if (top->group && counter != first)
888 group_fd = first->fd;
889
890 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
891
892 if (top->freq) {
893 attr->sample_type |= PERF_SAMPLE_PERIOD;
894 attr->freq = 1;
895 attr->sample_freq = top->freq;
896 }
897
898 if (evlist->nr_entries > 1) {
899 attr->sample_type |= PERF_SAMPLE_ID;
900 attr->read_format |= PERF_FORMAT_ID;
901 }
902
903 if (perf_target__has_cpu(&top->target))
904 attr->sample_type |= PERF_SAMPLE_CPU;
905
906 if (symbol_conf.use_callchain)
907 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
908
909 attr->mmap = 1;
910 attr->comm = 1;
911 attr->inherit = top->inherit;
912fallback_missing_features:
913 if (top->exclude_guest_missing)
914 attr->exclude_guest = attr->exclude_host = 0;
915retry_sample_id:
916 attr->sample_id_all = top->sample_id_all_missing ? 0 : 1;
917try_again:
918 if (perf_evsel__open(counter, top->evlist->cpus,
919 top->evlist->threads, top->group,
920 group_fd) < 0) {
921 int err = errno;
922
923 if (err == EPERM || err == EACCES) {
924 ui__error_paranoid();
925 goto out_err;
926 } else if (err == EINVAL) {
927 if (!top->exclude_guest_missing &&
928 (attr->exclude_guest || attr->exclude_host)) {
929 pr_debug("Old kernel, cannot exclude "
930 "guest or host samples.\n");
931 top->exclude_guest_missing = true;
932 goto fallback_missing_features;
933 } else if (!top->sample_id_all_missing) {
934 /*
935 * Old kernel, no attr->sample_id_type_all field
936 */
937 top->sample_id_all_missing = true;
938 goto retry_sample_id;
939 }
940 }
941 /*
942 * If it's cycles then fall back to hrtimer
943 * based cpu-clock-tick sw counter, which
944 * is always available even if no PMU support:
945 */
946 if (attr->type == PERF_TYPE_HARDWARE &&
947 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
948 if (verbose)
949 ui__warning("Cycles event not supported,\n"
950 "trying to fall back to cpu-clock-ticks\n");
951
952 attr->type = PERF_TYPE_SOFTWARE;
953 attr->config = PERF_COUNT_SW_CPU_CLOCK;
954 if (counter->name) {
955 free(counter->name);
956 counter->name = NULL;
957 }
958 goto try_again;
959 }
960
961 if (err == ENOENT) {
962 ui__error("The %s event is not supported.\n",
963 event_name(counter));
964 goto out_err;
965 } else if (err == EMFILE) {
966 ui__error("Too many events are opened.\n"
967 "Try again after reducing the number of events\n");
968 goto out_err;
969 }
970
971 ui__error("The sys_perf_event_open() syscall "
972 "returned with %d (%s). /bin/dmesg "
973 "may provide additional information.\n"
974 "No CONFIG_PERF_EVENTS=y kernel support "
975 "configured?\n", err, strerror(err));
976 goto out_err;
977 }
978 }
979
980 if (perf_evlist__mmap(evlist, top->mmap_pages, false) < 0) {
981 ui__error("Failed to mmap with %d (%s)\n",
982 errno, strerror(errno));
983 goto out_err;
984 }
985
986 return;
987
988out_err:
989 exit_browser(0);
990 exit(0);
991}
992
993static int perf_top__setup_sample_type(struct perf_top *top)
994{
995 if (!top->sort_has_symbols) {
996 if (symbol_conf.use_callchain) {
997 ui__error("Selected -g but \"sym\" not present in --sort/-s.");
998 return -EINVAL;
999 }
1000 } else if (!top->dont_use_callchains && callchain_param.mode != CHAIN_NONE) {
1001 if (callchain_register_param(&callchain_param) < 0) {
1002 ui__error("Can't register callchain params.\n");
1003 return -EINVAL;
1004 }
1005 }
1006
1007 return 0;
1008}
1009
1010static int __cmd_top(struct perf_top *top)
1011{
1012 pthread_t thread;
1013 int ret;
1014 /*
1015 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1016 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1017 */
1018 top->session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1019 if (top->session == NULL)
1020 return -ENOMEM;
1021
1022 ret = perf_top__setup_sample_type(top);
1023 if (ret)
1024 goto out_delete;
1025
1026 if (perf_target__has_task(&top->target))
1027 perf_event__synthesize_thread_map(&top->tool, top->evlist->threads,
1028 perf_event__process,
1029 &top->session->host_machine);
1030 else
1031 perf_event__synthesize_threads(&top->tool, perf_event__process,
1032 &top->session->host_machine);
1033 perf_top__start_counters(top);
1034 top->session->evlist = top->evlist;
1035 perf_session__update_sample_type(top->session);
1036
1037 /* Wait for a minimal set of events before starting the snapshot */
1038 poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1039
1040 perf_top__mmap_read(top);
1041
1042 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
1043 display_thread), top)) {
1044 ui__error("Could not create display thread.\n");
1045 exit(-1);
1046 }
1047
1048 if (top->realtime_prio) {
1049 struct sched_param param;
1050
1051 param.sched_priority = top->realtime_prio;
1052 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
1053 ui__error("Could not set realtime priority.\n");
1054 exit(-1);
1055 }
1056 }
1057
1058 while (1) {
1059 u64 hits = top->samples;
1060
1061 perf_top__mmap_read(top);
1062
1063 if (hits == top->samples)
1064 ret = poll(top->evlist->pollfd, top->evlist->nr_fds, 100);
1065 }
1066
1067out_delete:
1068 perf_session__delete(top->session);
1069 top->session = NULL;
1070
1071 return 0;
1072}
1073
1074static int
1075parse_callchain_opt(const struct option *opt, const char *arg, int unset)
1076{
1077 struct perf_top *top = (struct perf_top *)opt->value;
1078 char *tok, *tok2;
1079 char *endptr;
1080
1081 /*
1082 * --no-call-graph
1083 */
1084 if (unset) {
1085 top->dont_use_callchains = true;
1086 return 0;
1087 }
1088
1089 symbol_conf.use_callchain = true;
1090
1091 if (!arg)
1092 return 0;
1093
1094 tok = strtok((char *)arg, ",");
1095 if (!tok)
1096 return -1;
1097
1098 /* get the output mode */
1099 if (!strncmp(tok, "graph", strlen(arg)))
1100 callchain_param.mode = CHAIN_GRAPH_ABS;
1101
1102 else if (!strncmp(tok, "flat", strlen(arg)))
1103 callchain_param.mode = CHAIN_FLAT;
1104
1105 else if (!strncmp(tok, "fractal", strlen(arg)))
1106 callchain_param.mode = CHAIN_GRAPH_REL;
1107
1108 else if (!strncmp(tok, "none", strlen(arg))) {
1109 callchain_param.mode = CHAIN_NONE;
1110 symbol_conf.use_callchain = false;
1111
1112 return 0;
1113 } else
1114 return -1;
1115
1116 /* get the min percentage */
1117 tok = strtok(NULL, ",");
1118 if (!tok)
1119 goto setup;
1120
1121 callchain_param.min_percent = strtod(tok, &endptr);
1122 if (tok == endptr)
1123 return -1;
1124
1125 /* get the print limit */
1126 tok2 = strtok(NULL, ",");
1127 if (!tok2)
1128 goto setup;
1129
1130 if (tok2[0] != 'c') {
1131 callchain_param.print_limit = strtod(tok2, &endptr);
1132 tok2 = strtok(NULL, ",");
1133 if (!tok2)
1134 goto setup;
1135 }
1136
1137 /* get the call chain order */
1138 if (!strcmp(tok2, "caller"))
1139 callchain_param.order = ORDER_CALLER;
1140 else if (!strcmp(tok2, "callee"))
1141 callchain_param.order = ORDER_CALLEE;
1142 else
1143 return -1;
1144setup:
1145 if (callchain_register_param(&callchain_param) < 0) {
1146 fprintf(stderr, "Can't register callchain params\n");
1147 return -1;
1148 }
1149 return 0;
1150}
1151
1152static const char * const top_usage[] = {
1153 "perf top [<options>]",
1154 NULL
1155};
1156
1157int cmd_top(int argc, const char **argv, const char *prefix __used)
1158{
1159 struct perf_evsel *pos;
1160 int status;
1161 char errbuf[BUFSIZ];
1162 struct perf_top top = {
1163 .count_filter = 5,
1164 .delay_secs = 2,
1165 .freq = 4000, /* 4 KHz */
1166 .mmap_pages = 128,
1167 .sym_pcnt_filter = 5,
1168 .target = {
1169 .uses_mmap = true,
1170 },
1171 };
1172 char callchain_default_opt[] = "fractal,0.5,callee";
1173 const struct option options[] = {
1174 OPT_CALLBACK('e', "event", &top.evlist, "event",
1175 "event selector. use 'perf list' to list available events",
1176 parse_events_option),
1177 OPT_INTEGER('c', "count", &top.default_interval,
1178 "event period to sample"),
1179 OPT_STRING('p', "pid", &top.target.pid, "pid",
1180 "profile events on existing process id"),
1181 OPT_STRING('t', "tid", &top.target.tid, "tid",
1182 "profile events on existing thread id"),
1183 OPT_BOOLEAN('a', "all-cpus", &top.target.system_wide,
1184 "system-wide collection from all CPUs"),
1185 OPT_STRING('C', "cpu", &top.target.cpu_list, "cpu",
1186 "list of cpus to monitor"),
1187 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1188 "file", "vmlinux pathname"),
1189 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1190 "hide kernel symbols"),
1191 OPT_UINTEGER('m', "mmap-pages", &top.mmap_pages, "number of mmap data pages"),
1192 OPT_INTEGER('r', "realtime", &top.realtime_prio,
1193 "collect data with this RT SCHED_FIFO priority"),
1194 OPT_INTEGER('d', "delay", &top.delay_secs,
1195 "number of seconds to delay between refreshes"),
1196 OPT_BOOLEAN('D', "dump-symtab", &top.dump_symtab,
1197 "dump the symbol table used for profiling"),
1198 OPT_INTEGER('f', "count-filter", &top.count_filter,
1199 "only display functions with more events than this"),
1200 OPT_BOOLEAN('g', "group", &top.group,
1201 "put the counters into a counter group"),
1202 OPT_BOOLEAN('i', "inherit", &top.inherit,
1203 "child tasks inherit counters"),
1204 OPT_STRING(0, "sym-annotate", &top.sym_filter, "symbol name",
1205 "symbol to annotate"),
1206 OPT_BOOLEAN('z', "zero", &top.zero,
1207 "zero history across updates"),
1208 OPT_INTEGER('F', "freq", &top.freq,
1209 "profile at this frequency"),
1210 OPT_INTEGER('E', "entries", &top.print_entries,
1211 "display this many functions"),
1212 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1213 "hide user symbols"),
1214 OPT_BOOLEAN(0, "tui", &top.use_tui, "Use the TUI interface"),
1215 OPT_BOOLEAN(0, "stdio", &top.use_stdio, "Use the stdio interface"),
1216 OPT_INCR('v', "verbose", &verbose,
1217 "be more verbose (show counter open errors, etc)"),
1218 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
1219 "sort by key(s): pid, comm, dso, symbol, parent"),
1220 OPT_BOOLEAN('n', "show-nr-samples", &symbol_conf.show_nr_samples,
1221 "Show a column with the number of samples"),
1222 OPT_CALLBACK_DEFAULT('G', "call-graph", &top, "output_type,min_percent, call_order",
1223 "Display callchains using output_type (graph, flat, fractal, or none), min percent threshold and callchain order. "
1224 "Default: fractal,0.5,callee", &parse_callchain_opt,
1225 callchain_default_opt),
1226 OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
1227 "Show a column with the sum of periods"),
1228 OPT_STRING(0, "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
1229 "only consider symbols in these dsos"),
1230 OPT_STRING(0, "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
1231 "only consider symbols in these comms"),
1232 OPT_STRING(0, "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
1233 "only consider these symbols"),
1234 OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
1235 "Interleave source code with assembly code (default)"),
1236 OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
1237 "Display raw encoding of assembly instructions (default)"),
1238 OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
1239 "Specify disassembler style (e.g. -M intel for intel syntax)"),
1240 OPT_STRING('u', "uid", &top.target.uid_str, "user", "user to profile"),
1241 OPT_END()
1242 };
1243
1244 top.evlist = perf_evlist__new(NULL, NULL);
1245 if (top.evlist == NULL)
1246 return -ENOMEM;
1247
1248 symbol_conf.exclude_other = false;
1249
1250 argc = parse_options(argc, argv, options, top_usage, 0);
1251 if (argc)
1252 usage_with_options(top_usage, options);
1253
1254 if (sort_order == default_sort_order)
1255 sort_order = "dso,symbol";
1256
1257 setup_sorting(top_usage, options);
1258
1259 if (top.use_stdio)
1260 use_browser = 0;
1261 else if (top.use_tui)
1262 use_browser = 1;
1263
1264 setup_browser(false);
1265
1266 status = perf_target__validate(&top.target);
1267 if (status) {
1268 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1269 ui__warning("%s", errbuf);
1270 }
1271
1272 status = perf_target__parse_uid(&top.target);
1273 if (status) {
1274 int saved_errno = errno;
1275
1276 perf_target__strerror(&top.target, status, errbuf, BUFSIZ);
1277 ui__error("%s", errbuf);
1278
1279 status = -saved_errno;
1280 goto out_delete_evlist;
1281 }
1282
1283 if (perf_target__none(&top.target))
1284 top.target.system_wide = true;
1285
1286 if (perf_evlist__create_maps(top.evlist, &top.target) < 0)
1287 usage_with_options(top_usage, options);
1288
1289 if (!top.evlist->nr_entries &&
1290 perf_evlist__add_default(top.evlist) < 0) {
1291 ui__error("Not enough memory for event selector list\n");
1292 return -ENOMEM;
1293 }
1294
1295 symbol_conf.nr_events = top.evlist->nr_entries;
1296
1297 if (top.delay_secs < 1)
1298 top.delay_secs = 1;
1299
1300 /*
1301 * User specified count overrides default frequency.
1302 */
1303 if (top.default_interval)
1304 top.freq = 0;
1305 else if (top.freq) {
1306 top.default_interval = top.freq;
1307 } else {
1308 ui__error("frequency and count are zero, aborting\n");
1309 exit(EXIT_FAILURE);
1310 }
1311
1312 list_for_each_entry(pos, &top.evlist->entries, node) {
1313 /*
1314 * Fill in the ones not specifically initialized via -c:
1315 */
1316 if (!pos->attr.sample_period)
1317 pos->attr.sample_period = top.default_interval;
1318 }
1319
1320 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1321
1322 symbol_conf.priv_size = sizeof(struct annotation);
1323
1324 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1325 if (symbol__init() < 0)
1326 return -1;
1327
1328 sort_entry__setup_elide(&sort_dso, symbol_conf.dso_list, "dso", stdout);
1329 sort_entry__setup_elide(&sort_comm, symbol_conf.comm_list, "comm", stdout);
1330 sort_entry__setup_elide(&sort_sym, symbol_conf.sym_list, "symbol", stdout);
1331
1332 /*
1333 * Avoid annotation data structures overhead when symbols aren't on the
1334 * sort list.
1335 */
1336 top.sort_has_symbols = sort_sym.list.next != NULL;
1337
1338 get_term_dimensions(&top.winsize);
1339 if (top.print_entries == 0) {
1340 struct sigaction act = {
1341 .sa_sigaction = perf_top__sig_winch,
1342 .sa_flags = SA_SIGINFO,
1343 };
1344 perf_top__update_print_entries(&top);
1345 sigaction(SIGWINCH, &act, NULL);
1346 }
1347
1348 status = __cmd_top(&top);
1349
1350out_delete_evlist:
1351 perf_evlist__delete(top.evlist);
1352
1353 return status;
1354}
1/*
2 * builtin-top.c
3 *
4 * Builtin top command: Display a continuously updated profile of
5 * any workload, CPU or specific PID.
6 *
7 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
8 *
9 * Improvements and fixes by:
10 *
11 * Arjan van de Ven <arjan@linux.intel.com>
12 * Yanmin Zhang <yanmin.zhang@intel.com>
13 * Wu Fengguang <fengguang.wu@intel.com>
14 * Mike Galbraith <efault@gmx.de>
15 * Paul Mackerras <paulus@samba.org>
16 *
17 * Released under the GPL v2. (and only v2, not any later version)
18 */
19#include "builtin.h"
20
21#include "perf.h"
22
23#include "util/annotate.h"
24#include "util/cache.h"
25#include "util/color.h"
26#include "util/evlist.h"
27#include "util/evsel.h"
28#include "util/session.h"
29#include "util/symbol.h"
30#include "util/thread.h"
31#include "util/thread_map.h"
32#include "util/top.h"
33#include "util/util.h"
34#include <linux/rbtree.h>
35#include "util/parse-options.h"
36#include "util/parse-events.h"
37#include "util/cpumap.h"
38#include "util/xyarray.h"
39
40#include "util/debug.h"
41
42#include <assert.h>
43#include <fcntl.h>
44
45#include <stdio.h>
46#include <termios.h>
47#include <unistd.h>
48#include <inttypes.h>
49
50#include <errno.h>
51#include <time.h>
52#include <sched.h>
53
54#include <sys/syscall.h>
55#include <sys/ioctl.h>
56#include <sys/poll.h>
57#include <sys/prctl.h>
58#include <sys/wait.h>
59#include <sys/uio.h>
60#include <sys/mman.h>
61
62#include <linux/unistd.h>
63#include <linux/types.h>
64
65static struct perf_top top = {
66 .count_filter = 5,
67 .delay_secs = 2,
68 .display_weighted = -1,
69 .target_pid = -1,
70 .target_tid = -1,
71 .active_symbols = LIST_HEAD_INIT(top.active_symbols),
72 .active_symbols_lock = PTHREAD_MUTEX_INITIALIZER,
73 .active_symbols_cond = PTHREAD_COND_INITIALIZER,
74 .freq = 1000, /* 1 KHz */
75};
76
77static bool system_wide = false;
78
79static bool use_tui, use_stdio;
80
81static int default_interval = 0;
82
83static bool kptr_restrict_warned;
84static bool vmlinux_warned;
85static bool inherit = false;
86static int realtime_prio = 0;
87static bool group = false;
88static unsigned int page_size;
89static unsigned int mmap_pages = 128;
90
91static bool dump_symtab = false;
92
93static struct winsize winsize;
94
95static const char *sym_filter = NULL;
96struct sym_entry *sym_filter_entry_sched = NULL;
97static int sym_pcnt_filter = 5;
98
99/*
100 * Source functions
101 */
102
103void get_term_dimensions(struct winsize *ws)
104{
105 char *s = getenv("LINES");
106
107 if (s != NULL) {
108 ws->ws_row = atoi(s);
109 s = getenv("COLUMNS");
110 if (s != NULL) {
111 ws->ws_col = atoi(s);
112 if (ws->ws_row && ws->ws_col)
113 return;
114 }
115 }
116#ifdef TIOCGWINSZ
117 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
118 ws->ws_row && ws->ws_col)
119 return;
120#endif
121 ws->ws_row = 25;
122 ws->ws_col = 80;
123}
124
125static void update_print_entries(struct winsize *ws)
126{
127 top.print_entries = ws->ws_row;
128
129 if (top.print_entries > 9)
130 top.print_entries -= 9;
131}
132
133static void sig_winch_handler(int sig __used)
134{
135 get_term_dimensions(&winsize);
136 update_print_entries(&winsize);
137}
138
139static int parse_source(struct sym_entry *syme)
140{
141 struct symbol *sym;
142 struct annotation *notes;
143 struct map *map;
144 int err = -1;
145
146 if (!syme)
147 return -1;
148
149 sym = sym_entry__symbol(syme);
150 map = syme->map;
151
152 /*
153 * We can't annotate with just /proc/kallsyms
154 */
155 if (map->dso->symtab_type == SYMTAB__KALLSYMS) {
156 pr_err("Can't annotate %s: No vmlinux file was found in the "
157 "path\n", sym->name);
158 sleep(1);
159 return -1;
160 }
161
162 notes = symbol__annotation(sym);
163 if (notes->src != NULL) {
164 pthread_mutex_lock(¬es->lock);
165 goto out_assign;
166 }
167
168 pthread_mutex_lock(¬es->lock);
169
170 if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
171 pthread_mutex_unlock(¬es->lock);
172 pr_err("Not enough memory for annotating '%s' symbol!\n",
173 sym->name);
174 sleep(1);
175 return err;
176 }
177
178 err = symbol__annotate(sym, syme->map, 0);
179 if (err == 0) {
180out_assign:
181 top.sym_filter_entry = syme;
182 }
183
184 pthread_mutex_unlock(¬es->lock);
185 return err;
186}
187
188static void __zero_source_counters(struct sym_entry *syme)
189{
190 struct symbol *sym = sym_entry__symbol(syme);
191 symbol__annotate_zero_histograms(sym);
192}
193
194static void record_precise_ip(struct sym_entry *syme, struct map *map,
195 int counter, u64 ip)
196{
197 struct annotation *notes;
198 struct symbol *sym;
199
200 if (syme != top.sym_filter_entry)
201 return;
202
203 sym = sym_entry__symbol(syme);
204 notes = symbol__annotation(sym);
205
206 if (pthread_mutex_trylock(¬es->lock))
207 return;
208
209 ip = map->map_ip(map, ip);
210 symbol__inc_addr_samples(sym, map, counter, ip);
211
212 pthread_mutex_unlock(¬es->lock);
213}
214
215static void show_details(struct sym_entry *syme)
216{
217 struct annotation *notes;
218 struct symbol *symbol;
219 int more;
220
221 if (!syme)
222 return;
223
224 symbol = sym_entry__symbol(syme);
225 notes = symbol__annotation(symbol);
226
227 pthread_mutex_lock(¬es->lock);
228
229 if (notes->src == NULL)
230 goto out_unlock;
231
232 printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
233 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
234
235 more = symbol__annotate_printf(symbol, syme->map, top.sym_evsel->idx,
236 0, sym_pcnt_filter, top.print_entries, 4);
237 if (top.zero)
238 symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
239 else
240 symbol__annotate_decay_histogram(symbol, top.sym_evsel->idx);
241 if (more != 0)
242 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
243out_unlock:
244 pthread_mutex_unlock(¬es->lock);
245}
246
247static const char CONSOLE_CLEAR[] = "[H[2J";
248
249static void __list_insert_active_sym(struct sym_entry *syme)
250{
251 list_add(&syme->node, &top.active_symbols);
252}
253
254static void print_sym_table(struct perf_session *session)
255{
256 char bf[160];
257 int printed = 0;
258 struct rb_node *nd;
259 struct sym_entry *syme;
260 struct rb_root tmp = RB_ROOT;
261 const int win_width = winsize.ws_col - 1;
262 int sym_width, dso_width, dso_short_width;
263 float sum_ksamples = perf_top__decay_samples(&top, &tmp);
264
265 puts(CONSOLE_CLEAR);
266
267 perf_top__header_snprintf(&top, bf, sizeof(bf));
268 printf("%s\n", bf);
269
270 perf_top__reset_sample_counters(&top);
271
272 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
273
274 if (session->hists.stats.total_lost != 0) {
275 color_fprintf(stdout, PERF_COLOR_RED, "WARNING:");
276 printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n",
277 session->hists.stats.total_lost);
278 }
279
280 if (top.sym_filter_entry) {
281 show_details(top.sym_filter_entry);
282 return;
283 }
284
285 perf_top__find_widths(&top, &tmp, &dso_width, &dso_short_width,
286 &sym_width);
287
288 if (sym_width + dso_width > winsize.ws_col - 29) {
289 dso_width = dso_short_width;
290 if (sym_width + dso_width > winsize.ws_col - 29)
291 sym_width = winsize.ws_col - dso_width - 29;
292 }
293 putchar('\n');
294 if (top.evlist->nr_entries == 1)
295 printf(" samples pcnt");
296 else
297 printf(" weight samples pcnt");
298
299 if (verbose)
300 printf(" RIP ");
301 printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
302 printf(" %s _______ _____",
303 top.evlist->nr_entries == 1 ? " " : "______");
304 if (verbose)
305 printf(" ________________");
306 printf(" %-*.*s", sym_width, sym_width, graph_line);
307 printf(" %-*.*s", dso_width, dso_width, graph_line);
308 puts("\n");
309
310 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
311 struct symbol *sym;
312 double pcnt;
313
314 syme = rb_entry(nd, struct sym_entry, rb_node);
315 sym = sym_entry__symbol(syme);
316 if (++printed > top.print_entries ||
317 (int)syme->snap_count < top.count_filter)
318 continue;
319
320 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
321 sum_ksamples));
322
323 if (top.evlist->nr_entries == 1 || !top.display_weighted)
324 printf("%20.2f ", syme->weight);
325 else
326 printf("%9.1f %10ld ", syme->weight, syme->snap_count);
327
328 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
329 if (verbose)
330 printf(" %016" PRIx64, sym->start);
331 printf(" %-*.*s", sym_width, sym_width, sym->name);
332 printf(" %-*.*s\n", dso_width, dso_width,
333 dso_width >= syme->map->dso->long_name_len ?
334 syme->map->dso->long_name :
335 syme->map->dso->short_name);
336 }
337}
338
339static void prompt_integer(int *target, const char *msg)
340{
341 char *buf = malloc(0), *p;
342 size_t dummy = 0;
343 int tmp;
344
345 fprintf(stdout, "\n%s: ", msg);
346 if (getline(&buf, &dummy, stdin) < 0)
347 return;
348
349 p = strchr(buf, '\n');
350 if (p)
351 *p = 0;
352
353 p = buf;
354 while(*p) {
355 if (!isdigit(*p))
356 goto out_free;
357 p++;
358 }
359 tmp = strtoul(buf, NULL, 10);
360 *target = tmp;
361out_free:
362 free(buf);
363}
364
365static void prompt_percent(int *target, const char *msg)
366{
367 int tmp = 0;
368
369 prompt_integer(&tmp, msg);
370 if (tmp >= 0 && tmp <= 100)
371 *target = tmp;
372}
373
374static void prompt_symbol(struct sym_entry **target, const char *msg)
375{
376 char *buf = malloc(0), *p;
377 struct sym_entry *syme = *target, *n, *found = NULL;
378 size_t dummy = 0;
379
380 /* zero counters of active symbol */
381 if (syme) {
382 __zero_source_counters(syme);
383 *target = NULL;
384 }
385
386 fprintf(stdout, "\n%s: ", msg);
387 if (getline(&buf, &dummy, stdin) < 0)
388 goto out_free;
389
390 p = strchr(buf, '\n');
391 if (p)
392 *p = 0;
393
394 pthread_mutex_lock(&top.active_symbols_lock);
395 syme = list_entry(top.active_symbols.next, struct sym_entry, node);
396 pthread_mutex_unlock(&top.active_symbols_lock);
397
398 list_for_each_entry_safe_from(syme, n, &top.active_symbols, node) {
399 struct symbol *sym = sym_entry__symbol(syme);
400
401 if (!strcmp(buf, sym->name)) {
402 found = syme;
403 break;
404 }
405 }
406
407 if (!found) {
408 fprintf(stderr, "Sorry, %s is not active.\n", buf);
409 sleep(1);
410 return;
411 } else
412 parse_source(found);
413
414out_free:
415 free(buf);
416}
417
418static void print_mapped_keys(void)
419{
420 char *name = NULL;
421
422 if (top.sym_filter_entry) {
423 struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
424 name = sym->name;
425 }
426
427 fprintf(stdout, "\nMapped keys:\n");
428 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top.delay_secs);
429 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top.print_entries);
430
431 if (top.evlist->nr_entries > 1)
432 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top.sym_evsel));
433
434 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top.count_filter);
435
436 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
437 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
438 fprintf(stdout, "\t[S] stop annotation.\n");
439
440 if (top.evlist->nr_entries > 1)
441 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", top.display_weighted ? 1 : 0);
442
443 fprintf(stdout,
444 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
445 top.hide_kernel_symbols ? "yes" : "no");
446 fprintf(stdout,
447 "\t[U] hide user symbols. \t(%s)\n",
448 top.hide_user_symbols ? "yes" : "no");
449 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top.zero ? 1 : 0);
450 fprintf(stdout, "\t[qQ] quit.\n");
451}
452
453static int key_mapped(int c)
454{
455 switch (c) {
456 case 'd':
457 case 'e':
458 case 'f':
459 case 'z':
460 case 'q':
461 case 'Q':
462 case 'K':
463 case 'U':
464 case 'F':
465 case 's':
466 case 'S':
467 return 1;
468 case 'E':
469 case 'w':
470 return top.evlist->nr_entries > 1 ? 1 : 0;
471 default:
472 break;
473 }
474
475 return 0;
476}
477
478static void handle_keypress(struct perf_session *session, int c)
479{
480 if (!key_mapped(c)) {
481 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
482 struct termios tc, save;
483
484 print_mapped_keys();
485 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
486 fflush(stdout);
487
488 tcgetattr(0, &save);
489 tc = save;
490 tc.c_lflag &= ~(ICANON | ECHO);
491 tc.c_cc[VMIN] = 0;
492 tc.c_cc[VTIME] = 0;
493 tcsetattr(0, TCSANOW, &tc);
494
495 poll(&stdin_poll, 1, -1);
496 c = getc(stdin);
497
498 tcsetattr(0, TCSAFLUSH, &save);
499 if (!key_mapped(c))
500 return;
501 }
502
503 switch (c) {
504 case 'd':
505 prompt_integer(&top.delay_secs, "Enter display delay");
506 if (top.delay_secs < 1)
507 top.delay_secs = 1;
508 break;
509 case 'e':
510 prompt_integer(&top.print_entries, "Enter display entries (lines)");
511 if (top.print_entries == 0) {
512 sig_winch_handler(SIGWINCH);
513 signal(SIGWINCH, sig_winch_handler);
514 } else
515 signal(SIGWINCH, SIG_DFL);
516 break;
517 case 'E':
518 if (top.evlist->nr_entries > 1) {
519 /* Select 0 as the default event: */
520 int counter = 0;
521
522 fprintf(stderr, "\nAvailable events:");
523
524 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
525 fprintf(stderr, "\n\t%d %s", top.sym_evsel->idx, event_name(top.sym_evsel));
526
527 prompt_integer(&counter, "Enter details event counter");
528
529 if (counter >= top.evlist->nr_entries) {
530 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
531 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top.sym_evsel));
532 sleep(1);
533 break;
534 }
535 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
536 if (top.sym_evsel->idx == counter)
537 break;
538 } else
539 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
540 break;
541 case 'f':
542 prompt_integer(&top.count_filter, "Enter display event count filter");
543 break;
544 case 'F':
545 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
546 break;
547 case 'K':
548 top.hide_kernel_symbols = !top.hide_kernel_symbols;
549 break;
550 case 'q':
551 case 'Q':
552 printf("exiting.\n");
553 if (dump_symtab)
554 perf_session__fprintf_dsos(session, stderr);
555 exit(0);
556 case 's':
557 prompt_symbol(&top.sym_filter_entry, "Enter details symbol");
558 break;
559 case 'S':
560 if (!top.sym_filter_entry)
561 break;
562 else {
563 struct sym_entry *syme = top.sym_filter_entry;
564
565 top.sym_filter_entry = NULL;
566 __zero_source_counters(syme);
567 }
568 break;
569 case 'U':
570 top.hide_user_symbols = !top.hide_user_symbols;
571 break;
572 case 'w':
573 top.display_weighted = ~top.display_weighted;
574 break;
575 case 'z':
576 top.zero = !top.zero;
577 break;
578 default:
579 break;
580 }
581}
582
583static void *display_thread_tui(void *arg __used)
584{
585 int err = 0;
586 pthread_mutex_lock(&top.active_symbols_lock);
587 while (list_empty(&top.active_symbols)) {
588 err = pthread_cond_wait(&top.active_symbols_cond,
589 &top.active_symbols_lock);
590 if (err)
591 break;
592 }
593 pthread_mutex_unlock(&top.active_symbols_lock);
594 if (!err)
595 perf_top__tui_browser(&top);
596 exit_browser(0);
597 exit(0);
598 return NULL;
599}
600
601static void *display_thread(void *arg __used)
602{
603 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
604 struct termios tc, save;
605 int delay_msecs, c;
606 struct perf_session *session = (struct perf_session *) arg;
607
608 tcgetattr(0, &save);
609 tc = save;
610 tc.c_lflag &= ~(ICANON | ECHO);
611 tc.c_cc[VMIN] = 0;
612 tc.c_cc[VTIME] = 0;
613
614repeat:
615 delay_msecs = top.delay_secs * 1000;
616 tcsetattr(0, TCSANOW, &tc);
617 /* trash return*/
618 getc(stdin);
619
620 do {
621 print_sym_table(session);
622 } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
623
624 c = getc(stdin);
625 tcsetattr(0, TCSAFLUSH, &save);
626
627 handle_keypress(session, c);
628 goto repeat;
629
630 return NULL;
631}
632
633/* Tag samples to be skipped. */
634static const char *skip_symbols[] = {
635 "default_idle",
636 "native_safe_halt",
637 "cpu_idle",
638 "enter_idle",
639 "exit_idle",
640 "mwait_idle",
641 "mwait_idle_with_hints",
642 "poll_idle",
643 "ppc64_runlatch_off",
644 "pseries_dedicated_idle_sleep",
645 NULL
646};
647
648static int symbol_filter(struct map *map, struct symbol *sym)
649{
650 struct sym_entry *syme;
651 const char *name = sym->name;
652 int i;
653
654 /*
655 * ppc64 uses function descriptors and appends a '.' to the
656 * start of every instruction address. Remove it.
657 */
658 if (name[0] == '.')
659 name++;
660
661 if (!strcmp(name, "_text") ||
662 !strcmp(name, "_etext") ||
663 !strcmp(name, "_sinittext") ||
664 !strncmp("init_module", name, 11) ||
665 !strncmp("cleanup_module", name, 14) ||
666 strstr(name, "_text_start") ||
667 strstr(name, "_text_end"))
668 return 1;
669
670 syme = symbol__priv(sym);
671 syme->map = map;
672 symbol__annotate_init(map, sym);
673
674 if (!top.sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
675 /* schedule initial sym_filter_entry setup */
676 sym_filter_entry_sched = syme;
677 sym_filter = NULL;
678 }
679
680 for (i = 0; skip_symbols[i]; i++) {
681 if (!strcmp(skip_symbols[i], name)) {
682 sym->ignore = true;
683 break;
684 }
685 }
686
687 return 0;
688}
689
690static void perf_event__process_sample(const union perf_event *event,
691 struct perf_sample *sample,
692 struct perf_session *session)
693{
694 u64 ip = event->ip.ip;
695 struct sym_entry *syme;
696 struct addr_location al;
697 struct machine *machine;
698 u8 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
699
700 ++top.samples;
701
702 switch (origin) {
703 case PERF_RECORD_MISC_USER:
704 ++top.us_samples;
705 if (top.hide_user_symbols)
706 return;
707 machine = perf_session__find_host_machine(session);
708 break;
709 case PERF_RECORD_MISC_KERNEL:
710 ++top.kernel_samples;
711 if (top.hide_kernel_symbols)
712 return;
713 machine = perf_session__find_host_machine(session);
714 break;
715 case PERF_RECORD_MISC_GUEST_KERNEL:
716 ++top.guest_kernel_samples;
717 machine = perf_session__find_machine(session, event->ip.pid);
718 break;
719 case PERF_RECORD_MISC_GUEST_USER:
720 ++top.guest_us_samples;
721 /*
722 * TODO: we don't process guest user from host side
723 * except simple counting.
724 */
725 return;
726 default:
727 return;
728 }
729
730 if (!machine && perf_guest) {
731 pr_err("Can't find guest [%d]'s kernel information\n",
732 event->ip.pid);
733 return;
734 }
735
736 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
737 top.exact_samples++;
738
739 if (perf_event__preprocess_sample(event, session, &al, sample,
740 symbol_filter) < 0 ||
741 al.filtered)
742 return;
743
744 if (!kptr_restrict_warned &&
745 symbol_conf.kptr_restrict &&
746 al.cpumode == PERF_RECORD_MISC_KERNEL) {
747 ui__warning(
748"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
749"Check /proc/sys/kernel/kptr_restrict.\n\n"
750"Kernel%s samples will not be resolved.\n",
751 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
752 " modules" : "");
753 if (use_browser <= 0)
754 sleep(5);
755 kptr_restrict_warned = true;
756 }
757
758 if (al.sym == NULL) {
759 const char *msg = "Kernel samples will not be resolved.\n";
760 /*
761 * As we do lazy loading of symtabs we only will know if the
762 * specified vmlinux file is invalid when we actually have a
763 * hit in kernel space and then try to load it. So if we get
764 * here and there are _no_ symbols in the DSO backing the
765 * kernel map, bail out.
766 *
767 * We may never get here, for instance, if we use -K/
768 * --hide-kernel-symbols, even if the user specifies an
769 * invalid --vmlinux ;-)
770 */
771 if (!kptr_restrict_warned && !vmlinux_warned &&
772 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
773 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
774 if (symbol_conf.vmlinux_name) {
775 ui__warning("The %s file can't be used.\n%s",
776 symbol_conf.vmlinux_name, msg);
777 } else {
778 ui__warning("A vmlinux file was not found.\n%s",
779 msg);
780 }
781
782 if (use_browser <= 0)
783 sleep(5);
784 vmlinux_warned = true;
785 }
786
787 return;
788 }
789
790 /* let's see, whether we need to install initial sym_filter_entry */
791 if (sym_filter_entry_sched) {
792 top.sym_filter_entry = sym_filter_entry_sched;
793 sym_filter_entry_sched = NULL;
794 if (parse_source(top.sym_filter_entry) < 0) {
795 struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
796
797 pr_err("Can't annotate %s", sym->name);
798 if (top.sym_filter_entry->map->dso->symtab_type == SYMTAB__KALLSYMS) {
799 pr_err(": No vmlinux file was found in the path:\n");
800 machine__fprintf_vmlinux_path(machine, stderr);
801 } else
802 pr_err(".\n");
803 exit(1);
804 }
805 }
806
807 syme = symbol__priv(al.sym);
808 if (!al.sym->ignore) {
809 struct perf_evsel *evsel;
810
811 evsel = perf_evlist__id2evsel(top.evlist, sample->id);
812 assert(evsel != NULL);
813 syme->count[evsel->idx]++;
814 record_precise_ip(syme, al.map, evsel->idx, ip);
815 pthread_mutex_lock(&top.active_symbols_lock);
816 if (list_empty(&syme->node) || !syme->node.next) {
817 static bool first = true;
818 __list_insert_active_sym(syme);
819 if (first) {
820 pthread_cond_broadcast(&top.active_symbols_cond);
821 first = false;
822 }
823 }
824 pthread_mutex_unlock(&top.active_symbols_lock);
825 }
826}
827
828static void perf_session__mmap_read_idx(struct perf_session *self, int idx)
829{
830 struct perf_sample sample;
831 union perf_event *event;
832 int ret;
833
834 while ((event = perf_evlist__mmap_read(top.evlist, idx)) != NULL) {
835 ret = perf_session__parse_sample(self, event, &sample);
836 if (ret) {
837 pr_err("Can't parse sample, err = %d\n", ret);
838 continue;
839 }
840
841 if (event->header.type == PERF_RECORD_SAMPLE)
842 perf_event__process_sample(event, &sample, self);
843 else
844 perf_event__process(event, &sample, self);
845 }
846}
847
848static void perf_session__mmap_read(struct perf_session *self)
849{
850 int i;
851
852 for (i = 0; i < top.evlist->nr_mmaps; i++)
853 perf_session__mmap_read_idx(self, i);
854}
855
856static void start_counters(struct perf_evlist *evlist)
857{
858 struct perf_evsel *counter;
859
860 list_for_each_entry(counter, &evlist->entries, node) {
861 struct perf_event_attr *attr = &counter->attr;
862
863 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
864
865 if (top.freq) {
866 attr->sample_type |= PERF_SAMPLE_PERIOD;
867 attr->freq = 1;
868 attr->sample_freq = top.freq;
869 }
870
871 if (evlist->nr_entries > 1) {
872 attr->sample_type |= PERF_SAMPLE_ID;
873 attr->read_format |= PERF_FORMAT_ID;
874 }
875
876 attr->mmap = 1;
877 attr->inherit = inherit;
878try_again:
879 if (perf_evsel__open(counter, top.evlist->cpus,
880 top.evlist->threads, group) < 0) {
881 int err = errno;
882
883 if (err == EPERM || err == EACCES) {
884 ui__warning_paranoid();
885 goto out_err;
886 }
887 /*
888 * If it's cycles then fall back to hrtimer
889 * based cpu-clock-tick sw counter, which
890 * is always available even if no PMU support:
891 */
892 if (attr->type == PERF_TYPE_HARDWARE &&
893 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
894 if (verbose)
895 ui__warning("Cycles event not supported,\n"
896 "trying to fall back to cpu-clock-ticks\n");
897
898 attr->type = PERF_TYPE_SOFTWARE;
899 attr->config = PERF_COUNT_SW_CPU_CLOCK;
900 goto try_again;
901 }
902
903 if (err == ENOENT) {
904 ui__warning("The %s event is not supported.\n",
905 event_name(counter));
906 goto out_err;
907 }
908
909 ui__warning("The sys_perf_event_open() syscall "
910 "returned with %d (%s). /bin/dmesg "
911 "may provide additional information.\n"
912 "No CONFIG_PERF_EVENTS=y kernel support "
913 "configured?\n", err, strerror(err));
914 goto out_err;
915 }
916 }
917
918 if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) {
919 ui__warning("Failed to mmap with %d (%s)\n",
920 errno, strerror(errno));
921 goto out_err;
922 }
923
924 return;
925
926out_err:
927 exit_browser(0);
928 exit(0);
929}
930
931static int __cmd_top(void)
932{
933 pthread_t thread;
934 int ret __used;
935 /*
936 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
937 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
938 */
939 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
940 if (session == NULL)
941 return -ENOMEM;
942
943 if (top.target_tid != -1)
944 perf_event__synthesize_thread_map(top.evlist->threads,
945 perf_event__process, session);
946 else
947 perf_event__synthesize_threads(perf_event__process, session);
948
949 start_counters(top.evlist);
950 session->evlist = top.evlist;
951 perf_session__update_sample_type(session);
952
953 /* Wait for a minimal set of events before starting the snapshot */
954 poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
955
956 perf_session__mmap_read(session);
957
958 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
959 display_thread), session)) {
960 printf("Could not create display thread.\n");
961 exit(-1);
962 }
963
964 if (realtime_prio) {
965 struct sched_param param;
966
967 param.sched_priority = realtime_prio;
968 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
969 printf("Could not set realtime priority.\n");
970 exit(-1);
971 }
972 }
973
974 while (1) {
975 u64 hits = top.samples;
976
977 perf_session__mmap_read(session);
978
979 if (hits == top.samples)
980 ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
981 }
982
983 return 0;
984}
985
986static const char * const top_usage[] = {
987 "perf top [<options>]",
988 NULL
989};
990
991static const struct option options[] = {
992 OPT_CALLBACK('e', "event", &top.evlist, "event",
993 "event selector. use 'perf list' to list available events",
994 parse_events_option),
995 OPT_INTEGER('c', "count", &default_interval,
996 "event period to sample"),
997 OPT_INTEGER('p', "pid", &top.target_pid,
998 "profile events on existing process id"),
999 OPT_INTEGER('t', "tid", &top.target_tid,
1000 "profile events on existing thread id"),
1001 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1002 "system-wide collection from all CPUs"),
1003 OPT_STRING('C', "cpu", &top.cpu_list, "cpu",
1004 "list of cpus to monitor"),
1005 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1006 "file", "vmlinux pathname"),
1007 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1008 "hide kernel symbols"),
1009 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1010 OPT_INTEGER('r', "realtime", &realtime_prio,
1011 "collect data with this RT SCHED_FIFO priority"),
1012 OPT_INTEGER('d', "delay", &top.delay_secs,
1013 "number of seconds to delay between refreshes"),
1014 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1015 "dump the symbol table used for profiling"),
1016 OPT_INTEGER('f', "count-filter", &top.count_filter,
1017 "only display functions with more events than this"),
1018 OPT_BOOLEAN('g', "group", &group,
1019 "put the counters into a counter group"),
1020 OPT_BOOLEAN('i', "inherit", &inherit,
1021 "child tasks inherit counters"),
1022 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1023 "symbol to annotate"),
1024 OPT_BOOLEAN('z', "zero", &top.zero,
1025 "zero history across updates"),
1026 OPT_INTEGER('F', "freq", &top.freq,
1027 "profile at this frequency"),
1028 OPT_INTEGER('E', "entries", &top.print_entries,
1029 "display this many functions"),
1030 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1031 "hide user symbols"),
1032 OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"),
1033 OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
1034 OPT_INCR('v', "verbose", &verbose,
1035 "be more verbose (show counter open errors, etc)"),
1036 OPT_END()
1037};
1038
1039int cmd_top(int argc, const char **argv, const char *prefix __used)
1040{
1041 struct perf_evsel *pos;
1042 int status = -ENOMEM;
1043
1044 top.evlist = perf_evlist__new(NULL, NULL);
1045 if (top.evlist == NULL)
1046 return -ENOMEM;
1047
1048 page_size = sysconf(_SC_PAGE_SIZE);
1049
1050 argc = parse_options(argc, argv, options, top_usage, 0);
1051 if (argc)
1052 usage_with_options(top_usage, options);
1053
1054 /*
1055 * XXX For now start disabled, only using TUI if explicitely asked for.
1056 * Change that when handle_keys equivalent gets written, live annotation
1057 * done, etc.
1058 */
1059 use_browser = 0;
1060
1061 if (use_stdio)
1062 use_browser = 0;
1063 else if (use_tui)
1064 use_browser = 1;
1065
1066 setup_browser(false);
1067
1068 /* CPU and PID are mutually exclusive */
1069 if (top.target_tid > 0 && top.cpu_list) {
1070 printf("WARNING: PID switch overriding CPU\n");
1071 sleep(1);
1072 top.cpu_list = NULL;
1073 }
1074
1075 if (top.target_pid != -1)
1076 top.target_tid = top.target_pid;
1077
1078 if (perf_evlist__create_maps(top.evlist, top.target_pid,
1079 top.target_tid, top.cpu_list) < 0)
1080 usage_with_options(top_usage, options);
1081
1082 if (!top.evlist->nr_entries &&
1083 perf_evlist__add_default(top.evlist) < 0) {
1084 pr_err("Not enough memory for event selector list\n");
1085 return -ENOMEM;
1086 }
1087
1088 if (top.delay_secs < 1)
1089 top.delay_secs = 1;
1090
1091 /*
1092 * User specified count overrides default frequency.
1093 */
1094 if (default_interval)
1095 top.freq = 0;
1096 else if (top.freq) {
1097 default_interval = top.freq;
1098 } else {
1099 fprintf(stderr, "frequency and count are zero, aborting\n");
1100 exit(EXIT_FAILURE);
1101 }
1102
1103 list_for_each_entry(pos, &top.evlist->entries, node) {
1104 if (perf_evsel__alloc_fd(pos, top.evlist->cpus->nr,
1105 top.evlist->threads->nr) < 0)
1106 goto out_free_fd;
1107 /*
1108 * Fill in the ones not specifically initialized via -c:
1109 */
1110 if (pos->attr.sample_period)
1111 continue;
1112
1113 pos->attr.sample_period = default_interval;
1114 }
1115
1116 if (perf_evlist__alloc_pollfd(top.evlist) < 0 ||
1117 perf_evlist__alloc_mmap(top.evlist) < 0)
1118 goto out_free_fd;
1119
1120 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1121
1122 symbol_conf.priv_size = (sizeof(struct sym_entry) + sizeof(struct annotation) +
1123 (top.evlist->nr_entries + 1) * sizeof(unsigned long));
1124
1125 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1126 if (symbol__init() < 0)
1127 return -1;
1128
1129 get_term_dimensions(&winsize);
1130 if (top.print_entries == 0) {
1131 update_print_entries(&winsize);
1132 signal(SIGWINCH, sig_winch_handler);
1133 }
1134
1135 status = __cmd_top();
1136out_free_fd:
1137 perf_evlist__delete(top.evlist);
1138
1139 return status;
1140}