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[linux-2.6/next.git] / tools / perf / builtin-top.c
blobf2f3f4937aa245142eda2082274b7b200e41db4e
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
65 static 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
77 static bool system_wide = false;
78
79 static bool use_tui, use_stdio;
80
81 static int default_interval = 0;
82
83 static bool kptr_restrict_warned;
84 static bool vmlinux_warned;
85 static bool inherit = false;
86 static int realtime_prio = 0;
87 static bool group = false;
88 static unsigned int page_size;
89 static unsigned int mmap_pages = 128;
90
91 static bool dump_symtab = false;
92
93 static struct winsize winsize;
94
95 static const char *sym_filter = NULL;
96 struct sym_entry *sym_filter_entry_sched = NULL;
97 static int sym_pcnt_filter = 5;
98
99 /*
100 * Source functions
101 */
102
103 void 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
125 static 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
133 static void sig_winch_handler(int sig __used)
134 {
135 get_term_dimensions(&winsize);
136 update_print_entries(&winsize);
137 }
138
139 static 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(&notes->lock);
165 goto out_assign;
166 }
167
168 pthread_mutex_lock(&notes->lock);
169
170 if (symbol__alloc_hist(sym, top.evlist->nr_entries) < 0) {
171 pthread_mutex_unlock(&notes->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) {
180 out_assign:
181 top.sym_filter_entry = syme;
182 }
183
184 pthread_mutex_unlock(&notes->lock);
185 return err;
186 }
187
188 static 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
194 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
195 {
196 struct annotation *notes;
197 struct symbol *sym;
198
199 if (syme != top.sym_filter_entry)
200 return;
201
202 sym = sym_entry__symbol(syme);
203 notes = symbol__annotation(sym);
204
205 if (pthread_mutex_trylock(&notes->lock))
206 return;
207
208 ip = syme->map->map_ip(syme->map, ip);
209 symbol__inc_addr_samples(sym, syme->map, counter, ip);
210
211 pthread_mutex_unlock(&notes->lock);
212 }
213
214 static void show_details(struct sym_entry *syme)
215 {
216 struct annotation *notes;
217 struct symbol *symbol;
218 int more;
219
220 if (!syme)
221 return;
222
223 symbol = sym_entry__symbol(syme);
224 notes = symbol__annotation(symbol);
225
226 pthread_mutex_lock(&notes->lock);
227
228 if (notes->src == NULL)
229 goto out_unlock;
230
231 printf("Showing %s for %s\n", event_name(top.sym_evsel), symbol->name);
232 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
233
234 more = symbol__annotate_printf(symbol, syme->map, top.sym_evsel->idx,
235 0, sym_pcnt_filter, top.print_entries, 4);
236 if (top.zero)
237 symbol__annotate_zero_histogram(symbol, top.sym_evsel->idx);
238 else
239 symbol__annotate_decay_histogram(symbol, top.sym_evsel->idx);
240 if (more != 0)
241 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
242 out_unlock:
243 pthread_mutex_unlock(&notes->lock);
244 }
245
246 static const char CONSOLE_CLEAR[] = "\e[H\e[2J";
247
248 static void __list_insert_active_sym(struct sym_entry *syme)
249 {
250 list_add(&syme->node, &top.active_symbols);
251 }
252
253 static void print_sym_table(struct perf_session *session)
254 {
255 char bf[160];
256 int printed = 0;
257 struct rb_node *nd;
258 struct sym_entry *syme;
259 struct rb_root tmp = RB_ROOT;
260 const int win_width = winsize.ws_col - 1;
261 int sym_width, dso_width, dso_short_width;
262 float sum_ksamples = perf_top__decay_samples(&top, &tmp);
263
264 puts(CONSOLE_CLEAR);
265
266 perf_top__header_snprintf(&top, bf, sizeof(bf));
267 printf("%s\n", bf);
268
269 perf_top__reset_sample_counters(&top);
270
271 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
272
273 if (session->hists.stats.total_lost != 0) {
274 color_fprintf(stdout, PERF_COLOR_RED, "WARNING:");
275 printf(" LOST %" PRIu64 " events, Check IO/CPU overload\n",
276 session->hists.stats.total_lost);
277 }
278
279 if (top.sym_filter_entry) {
280 show_details(top.sym_filter_entry);
281 return;
282 }
283
284 perf_top__find_widths(&top, &tmp, &dso_width, &dso_short_width,
285 &sym_width);
286
287 if (sym_width + dso_width > winsize.ws_col - 29) {
288 dso_width = dso_short_width;
289 if (sym_width + dso_width > winsize.ws_col - 29)
290 sym_width = winsize.ws_col - dso_width - 29;
291 }
292 putchar('\n');
293 if (top.evlist->nr_entries == 1)
294 printf(" samples pcnt");
295 else
296 printf(" weight samples pcnt");
297
298 if (verbose)
299 printf(" RIP ");
300 printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
301 printf(" %s _______ _____",
302 top.evlist->nr_entries == 1 ? " " : "______");
303 if (verbose)
304 printf(" ________________");
305 printf(" %-*.*s", sym_width, sym_width, graph_line);
306 printf(" %-*.*s", dso_width, dso_width, graph_line);
307 puts("\n");
308
309 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
310 struct symbol *sym;
311 double pcnt;
312
313 syme = rb_entry(nd, struct sym_entry, rb_node);
314 sym = sym_entry__symbol(syme);
315 if (++printed > top.print_entries ||
316 (int)syme->snap_count < top.count_filter)
317 continue;
318
319 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
320 sum_ksamples));
321
322 if (top.evlist->nr_entries == 1 || !top.display_weighted)
323 printf("%20.2f ", syme->weight);
324 else
325 printf("%9.1f %10ld ", syme->weight, syme->snap_count);
326
327 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
328 if (verbose)
329 printf(" %016" PRIx64, sym->start);
330 printf(" %-*.*s", sym_width, sym_width, sym->name);
331 printf(" %-*.*s\n", dso_width, dso_width,
332 dso_width >= syme->map->dso->long_name_len ?
333 syme->map->dso->long_name :
334 syme->map->dso->short_name);
335 }
336 }
337
338 static void prompt_integer(int *target, const char *msg)
339 {
340 char *buf = malloc(0), *p;
341 size_t dummy = 0;
342 int tmp;
343
344 fprintf(stdout, "\n%s: ", msg);
345 if (getline(&buf, &dummy, stdin) < 0)
346 return;
347
348 p = strchr(buf, '\n');
349 if (p)
350 *p = 0;
351
352 p = buf;
353 while(*p) {
354 if (!isdigit(*p))
355 goto out_free;
356 p++;
357 }
358 tmp = strtoul(buf, NULL, 10);
359 *target = tmp;
360 out_free:
361 free(buf);
362 }
363
364 static void prompt_percent(int *target, const char *msg)
365 {
366 int tmp = 0;
367
368 prompt_integer(&tmp, msg);
369 if (tmp >= 0 && tmp <= 100)
370 *target = tmp;
371 }
372
373 static void prompt_symbol(struct sym_entry **target, const char *msg)
374 {
375 char *buf = malloc(0), *p;
376 struct sym_entry *syme = *target, *n, *found = NULL;
377 size_t dummy = 0;
378
379 /* zero counters of active symbol */
380 if (syme) {
381 __zero_source_counters(syme);
382 *target = NULL;
383 }
384
385 fprintf(stdout, "\n%s: ", msg);
386 if (getline(&buf, &dummy, stdin) < 0)
387 goto out_free;
388
389 p = strchr(buf, '\n');
390 if (p)
391 *p = 0;
392
393 pthread_mutex_lock(&top.active_symbols_lock);
394 syme = list_entry(top.active_symbols.next, struct sym_entry, node);
395 pthread_mutex_unlock(&top.active_symbols_lock);
396
397 list_for_each_entry_safe_from(syme, n, &top.active_symbols, node) {
398 struct symbol *sym = sym_entry__symbol(syme);
399
400 if (!strcmp(buf, sym->name)) {
401 found = syme;
402 break;
403 }
404 }
405
406 if (!found) {
407 fprintf(stderr, "Sorry, %s is not active.\n", buf);
408 sleep(1);
409 return;
410 } else
411 parse_source(found);
412
413 out_free:
414 free(buf);
415 }
416
417 static void print_mapped_keys(void)
418 {
419 char *name = NULL;
420
421 if (top.sym_filter_entry) {
422 struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
423 name = sym->name;
424 }
425
426 fprintf(stdout, "\nMapped keys:\n");
427 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", top.delay_secs);
428 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", top.print_entries);
429
430 if (top.evlist->nr_entries > 1)
431 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(top.sym_evsel));
432
433 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", top.count_filter);
434
435 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
436 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
437 fprintf(stdout, "\t[S] stop annotation.\n");
438
439 if (top.evlist->nr_entries > 1)
440 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", top.display_weighted ? 1 : 0);
441
442 fprintf(stdout,
443 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
444 top.hide_kernel_symbols ? "yes" : "no");
445 fprintf(stdout,
446 "\t[U] hide user symbols. \t(%s)\n",
447 top.hide_user_symbols ? "yes" : "no");
448 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", top.zero ? 1 : 0);
449 fprintf(stdout, "\t[qQ] quit.\n");
450 }
451
452 static int key_mapped(int c)
453 {
454 switch (c) {
455 case 'd':
456 case 'e':
457 case 'f':
458 case 'z':
459 case 'q':
460 case 'Q':
461 case 'K':
462 case 'U':
463 case 'F':
464 case 's':
465 case 'S':
466 return 1;
467 case 'E':
468 case 'w':
469 return top.evlist->nr_entries > 1 ? 1 : 0;
470 default:
471 break;
472 }
473
474 return 0;
475 }
476
477 static void handle_keypress(struct perf_session *session, int c)
478 {
479 if (!key_mapped(c)) {
480 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
481 struct termios tc, save;
482
483 print_mapped_keys();
484 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
485 fflush(stdout);
486
487 tcgetattr(0, &save);
488 tc = save;
489 tc.c_lflag &= ~(ICANON | ECHO);
490 tc.c_cc[VMIN] = 0;
491 tc.c_cc[VTIME] = 0;
492 tcsetattr(0, TCSANOW, &tc);
493
494 poll(&stdin_poll, 1, -1);
495 c = getc(stdin);
496
497 tcsetattr(0, TCSAFLUSH, &save);
498 if (!key_mapped(c))
499 return;
500 }
501
502 switch (c) {
503 case 'd':
504 prompt_integer(&top.delay_secs, "Enter display delay");
505 if (top.delay_secs < 1)
506 top.delay_secs = 1;
507 break;
508 case 'e':
509 prompt_integer(&top.print_entries, "Enter display entries (lines)");
510 if (top.print_entries == 0) {
511 sig_winch_handler(SIGWINCH);
512 signal(SIGWINCH, sig_winch_handler);
513 } else
514 signal(SIGWINCH, SIG_DFL);
515 break;
516 case 'E':
517 if (top.evlist->nr_entries > 1) {
518 /* Select 0 as the default event: */
519 int counter = 0;
520
521 fprintf(stderr, "\nAvailable events:");
522
523 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
524 fprintf(stderr, "\n\t%d %s", top.sym_evsel->idx, event_name(top.sym_evsel));
525
526 prompt_integer(&counter, "Enter details event counter");
527
528 if (counter >= top.evlist->nr_entries) {
529 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
530 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(top.sym_evsel));
531 sleep(1);
532 break;
533 }
534 list_for_each_entry(top.sym_evsel, &top.evlist->entries, node)
535 if (top.sym_evsel->idx == counter)
536 break;
537 } else
538 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
539 break;
540 case 'f':
541 prompt_integer(&top.count_filter, "Enter display event count filter");
542 break;
543 case 'F':
544 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
545 break;
546 case 'K':
547 top.hide_kernel_symbols = !top.hide_kernel_symbols;
548 break;
549 case 'q':
550 case 'Q':
551 printf("exiting.\n");
552 if (dump_symtab)
553 perf_session__fprintf_dsos(session, stderr);
554 exit(0);
555 case 's':
556 prompt_symbol(&top.sym_filter_entry, "Enter details symbol");
557 break;
558 case 'S':
559 if (!top.sym_filter_entry)
560 break;
561 else {
562 struct sym_entry *syme = top.sym_filter_entry;
563
564 top.sym_filter_entry = NULL;
565 __zero_source_counters(syme);
566 }
567 break;
568 case 'U':
569 top.hide_user_symbols = !top.hide_user_symbols;
570 break;
571 case 'w':
572 top.display_weighted = ~top.display_weighted;
573 break;
574 case 'z':
575 top.zero = !top.zero;
576 break;
577 default:
578 break;
579 }
580 }
581
582 static void *display_thread_tui(void *arg __used)
583 {
584 int err = 0;
585 pthread_mutex_lock(&top.active_symbols_lock);
586 while (list_empty(&top.active_symbols)) {
587 err = pthread_cond_wait(&top.active_symbols_cond,
588 &top.active_symbols_lock);
589 if (err)
590 break;
591 }
592 pthread_mutex_unlock(&top.active_symbols_lock);
593 if (!err)
594 perf_top__tui_browser(&top);
595 exit_browser(0);
596 exit(0);
597 return NULL;
598 }
599
600 static void *display_thread(void *arg __used)
601 {
602 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
603 struct termios tc, save;
604 int delay_msecs, c;
605 struct perf_session *session = (struct perf_session *) arg;
606
607 tcgetattr(0, &save);
608 tc = save;
609 tc.c_lflag &= ~(ICANON | ECHO);
610 tc.c_cc[VMIN] = 0;
611 tc.c_cc[VTIME] = 0;
612
613 repeat:
614 delay_msecs = top.delay_secs * 1000;
615 tcsetattr(0, TCSANOW, &tc);
616 /* trash return*/
617 getc(stdin);
618
619 do {
620 print_sym_table(session);
621 } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
622
623 c = getc(stdin);
624 tcsetattr(0, TCSAFLUSH, &save);
625
626 handle_keypress(session, c);
627 goto repeat;
628
629 return NULL;
630 }
631
632 /* Tag samples to be skipped. */
633 static const char *skip_symbols[] = {
634 "default_idle",
635 "native_safe_halt",
636 "cpu_idle",
637 "enter_idle",
638 "exit_idle",
639 "mwait_idle",
640 "mwait_idle_with_hints",
641 "poll_idle",
642 "ppc64_runlatch_off",
643 "pseries_dedicated_idle_sleep",
644 NULL
645 };
646
647 static int symbol_filter(struct map *map, struct symbol *sym)
648 {
649 struct sym_entry *syme;
650 const char *name = sym->name;
651 int i;
652
653 /*
654 * ppc64 uses function descriptors and appends a '.' to the
655 * start of every instruction address. Remove it.
656 */
657 if (name[0] == '.')
658 name++;
659
660 if (!strcmp(name, "_text") ||
661 !strcmp(name, "_etext") ||
662 !strcmp(name, "_sinittext") ||
663 !strncmp("init_module", name, 11) ||
664 !strncmp("cleanup_module", name, 14) ||
665 strstr(name, "_text_start") ||
666 strstr(name, "_text_end"))
667 return 1;
668
669 syme = symbol__priv(sym);
670 syme->map = map;
671 symbol__annotate_init(map, sym);
672
673 if (!top.sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
674 /* schedule initial sym_filter_entry setup */
675 sym_filter_entry_sched = syme;
676 sym_filter = NULL;
677 }
678
679 for (i = 0; skip_symbols[i]; i++) {
680 if (!strcmp(skip_symbols[i], name)) {
681 sym->ignore = true;
682 break;
683 }
684 }
685
686 return 0;
687 }
688
689 static void perf_event__process_sample(const union perf_event *event,
690 struct perf_sample *sample,
691 struct perf_session *session)
692 {
693 u64 ip = event->ip.ip;
694 struct sym_entry *syme;
695 struct addr_location al;
696 struct machine *machine;
697 u8 origin = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
698
699 ++top.samples;
700
701 switch (origin) {
702 case PERF_RECORD_MISC_USER:
703 ++top.us_samples;
704 if (top.hide_user_symbols)
705 return;
706 machine = perf_session__find_host_machine(session);
707 break;
708 case PERF_RECORD_MISC_KERNEL:
709 ++top.kernel_samples;
710 if (top.hide_kernel_symbols)
711 return;
712 machine = perf_session__find_host_machine(session);
713 break;
714 case PERF_RECORD_MISC_GUEST_KERNEL:
715 ++top.guest_kernel_samples;
716 machine = perf_session__find_machine(session, event->ip.pid);
717 break;
718 case PERF_RECORD_MISC_GUEST_USER:
719 ++top.guest_us_samples;
720 /*
721 * TODO: we don't process guest user from host side
722 * except simple counting.
723 */
724 return;
725 default:
726 return;
727 }
728
729 if (!machine && perf_guest) {
730 pr_err("Can't find guest [%d]'s kernel information\n",
731 event->ip.pid);
732 return;
733 }
734
735 if (event->header.misc & PERF_RECORD_MISC_EXACT_IP)
736 top.exact_samples++;
737
738 if (perf_event__preprocess_sample(event, session, &al, sample,
739 symbol_filter) < 0 ||
740 al.filtered)
741 return;
742
743 if (!kptr_restrict_warned &&
744 symbol_conf.kptr_restrict &&
745 al.cpumode == PERF_RECORD_MISC_KERNEL) {
746 ui__warning(
747 "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
748 "Check /proc/sys/kernel/kptr_restrict.\n\n"
749 "Kernel%s samples will not be resolved.\n",
750 !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ?
751 " modules" : "");
752 if (use_browser <= 0)
753 sleep(5);
754 kptr_restrict_warned = true;
755 }
756
757 if (al.sym == NULL) {
758 const char *msg = "Kernel samples will not be resolved.\n";
759 /*
760 * As we do lazy loading of symtabs we only will know if the
761 * specified vmlinux file is invalid when we actually have a
762 * hit in kernel space and then try to load it. So if we get
763 * here and there are _no_ symbols in the DSO backing the
764 * kernel map, bail out.
765 *
766 * We may never get here, for instance, if we use -K/
767 * --hide-kernel-symbols, even if the user specifies an
768 * invalid --vmlinux ;-)
769 */
770 if (!kptr_restrict_warned && !vmlinux_warned &&
771 al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
772 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
773 if (symbol_conf.vmlinux_name) {
774 ui__warning("The %s file can't be used.\n%s",
775 symbol_conf.vmlinux_name, msg);
776 } else {
777 ui__warning("A vmlinux file was not found.\n%s",
778 msg);
779 }
780
781 if (use_browser <= 0)
782 sleep(5);
783 vmlinux_warned = true;
784 }
785
786 return;
787 }
788
789 /* let's see, whether we need to install initial sym_filter_entry */
790 if (sym_filter_entry_sched) {
791 top.sym_filter_entry = sym_filter_entry_sched;
792 sym_filter_entry_sched = NULL;
793 if (parse_source(top.sym_filter_entry) < 0) {
794 struct symbol *sym = sym_entry__symbol(top.sym_filter_entry);
795
796 pr_err("Can't annotate %s", sym->name);
797 if (top.sym_filter_entry->map->dso->symtab_type == SYMTAB__KALLSYMS) {
798 pr_err(": No vmlinux file was found in the path:\n");
799 machine__fprintf_vmlinux_path(machine, stderr);
800 } else
801 pr_err(".\n");
802 exit(1);
803 }
804 }
805
806 syme = symbol__priv(al.sym);
807 if (!al.sym->ignore) {
808 struct perf_evsel *evsel;
809
810 evsel = perf_evlist__id2evsel(top.evlist, sample->id);
811 assert(evsel != NULL);
812 syme->count[evsel->idx]++;
813 record_precise_ip(syme, evsel->idx, ip);
814 pthread_mutex_lock(&top.active_symbols_lock);
815 if (list_empty(&syme->node) || !syme->node.next) {
816 static bool first = true;
817 __list_insert_active_sym(syme);
818 if (first) {
819 pthread_cond_broadcast(&top.active_symbols_cond);
820 first = false;
821 }
822 }
823 pthread_mutex_unlock(&top.active_symbols_lock);
824 }
825 }
826
827 static void perf_session__mmap_read_idx(struct perf_session *self, int idx)
828 {
829 struct perf_sample sample;
830 union perf_event *event;
831 int ret;
832
833 while ((event = perf_evlist__mmap_read(top.evlist, idx)) != NULL) {
834 ret = perf_session__parse_sample(self, event, &sample);
835 if (ret) {
836 pr_err("Can't parse sample, err = %d\n", ret);
837 continue;
838 }
839
840 if (event->header.type == PERF_RECORD_SAMPLE)
841 perf_event__process_sample(event, &sample, self);
842 else
843 perf_event__process(event, &sample, self);
844 }
845 }
846
847 static void perf_session__mmap_read(struct perf_session *self)
848 {
849 int i;
850
851 for (i = 0; i < top.evlist->nr_mmaps; i++)
852 perf_session__mmap_read_idx(self, i);
853 }
854
855 static void start_counters(struct perf_evlist *evlist)
856 {
857 struct perf_evsel *counter;
858
859 list_for_each_entry(counter, &evlist->entries, node) {
860 struct perf_event_attr *attr = &counter->attr;
861
862 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
863
864 if (top.freq) {
865 attr->sample_type |= PERF_SAMPLE_PERIOD;
866 attr->freq = 1;
867 attr->sample_freq = top.freq;
868 }
869
870 if (evlist->nr_entries > 1) {
871 attr->sample_type |= PERF_SAMPLE_ID;
872 attr->read_format |= PERF_FORMAT_ID;
873 }
874
875 attr->mmap = 1;
876 attr->inherit = inherit;
877 try_again:
878 if (perf_evsel__open(counter, top.evlist->cpus,
879 top.evlist->threads, group) < 0) {
880 int err = errno;
881
882 if (err == EPERM || err == EACCES) {
883 ui__warning_paranoid();
884 goto out_err;
885 }
886 /*
887 * If it's cycles then fall back to hrtimer
888 * based cpu-clock-tick sw counter, which
889 * is always available even if no PMU support:
890 */
891 if (attr->type == PERF_TYPE_HARDWARE &&
892 attr->config == PERF_COUNT_HW_CPU_CYCLES) {
893 if (verbose)
894 ui__warning("Cycles event not supported,\n"
895 "trying to fall back to cpu-clock-ticks\n");
896
897 attr->type = PERF_TYPE_SOFTWARE;
898 attr->config = PERF_COUNT_SW_CPU_CLOCK;
899 goto try_again;
900 }
901
902 if (err == ENOENT) {
903 ui__warning("The %s event is not supported.\n",
904 event_name(counter));
905 goto out_err;
906 }
907
908 ui__warning("The sys_perf_event_open() syscall "
909 "returned with %d (%s). /bin/dmesg "
910 "may provide additional information.\n"
911 "No CONFIG_PERF_EVENTS=y kernel support "
912 "configured?\n", err, strerror(err));
913 goto out_err;
914 }
915 }
916
917 if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) {
918 ui__warning("Failed to mmap with %d (%s)\n",
919 errno, strerror(errno));
920 goto out_err;
921 }
922
923 return;
924
925 out_err:
926 exit_browser(0);
927 exit(0);
928 }
929
930 static int __cmd_top(void)
931 {
932 pthread_t thread;
933 int ret __used;
934 /*
935 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
936 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
937 */
938 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
939 if (session == NULL)
940 return -ENOMEM;
941
942 if (top.target_tid != -1)
943 perf_event__synthesize_thread_map(top.evlist->threads,
944 perf_event__process, session);
945 else
946 perf_event__synthesize_threads(perf_event__process, session);
947
948 start_counters(top.evlist);
949 session->evlist = top.evlist;
950 perf_session__update_sample_type(session);
951
952 /* Wait for a minimal set of events before starting the snapshot */
953 poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
954
955 perf_session__mmap_read(session);
956
957 if (pthread_create(&thread, NULL, (use_browser > 0 ? display_thread_tui :
958 display_thread), session)) {
959 printf("Could not create display thread.\n");
960 exit(-1);
961 }
962
963 if (realtime_prio) {
964 struct sched_param param;
965
966 param.sched_priority = realtime_prio;
967 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
968 printf("Could not set realtime priority.\n");
969 exit(-1);
970 }
971 }
972
973 while (1) {
974 u64 hits = top.samples;
975
976 perf_session__mmap_read(session);
977
978 if (hits == top.samples)
979 ret = poll(top.evlist->pollfd, top.evlist->nr_fds, 100);
980 }
981
982 return 0;
983 }
984
985 static const char * const top_usage[] = {
986 "perf top [<options>]",
987 NULL
988 };
989
990 static const struct option options[] = {
991 OPT_CALLBACK('e', "event", &top.evlist, "event",
992 "event selector. use 'perf list' to list available events",
993 parse_events),
994 OPT_INTEGER('c', "count", &default_interval,
995 "event period to sample"),
996 OPT_INTEGER('p', "pid", &top.target_pid,
997 "profile events on existing process id"),
998 OPT_INTEGER('t', "tid", &top.target_tid,
999 "profile events on existing thread id"),
1000 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1001 "system-wide collection from all CPUs"),
1002 OPT_STRING('C', "cpu", &top.cpu_list, "cpu",
1003 "list of cpus to monitor"),
1004 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1005 "file", "vmlinux pathname"),
1006 OPT_BOOLEAN('K', "hide_kernel_symbols", &top.hide_kernel_symbols,
1007 "hide kernel symbols"),
1008 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1009 OPT_INTEGER('r', "realtime", &realtime_prio,
1010 "collect data with this RT SCHED_FIFO priority"),
1011 OPT_INTEGER('d', "delay", &top.delay_secs,
1012 "number of seconds to delay between refreshes"),
1013 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1014 "dump the symbol table used for profiling"),
1015 OPT_INTEGER('f', "count-filter", &top.count_filter,
1016 "only display functions with more events than this"),
1017 OPT_BOOLEAN('g', "group", &group,
1018 "put the counters into a counter group"),
1019 OPT_BOOLEAN('i', "inherit", &inherit,
1020 "child tasks inherit counters"),
1021 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1022 "symbol to annotate"),
1023 OPT_BOOLEAN('z', "zero", &top.zero,
1024 "zero history across updates"),
1025 OPT_INTEGER('F', "freq", &top.freq,
1026 "profile at this frequency"),
1027 OPT_INTEGER('E', "entries", &top.print_entries,
1028 "display this many functions"),
1029 OPT_BOOLEAN('U', "hide_user_symbols", &top.hide_user_symbols,
1030 "hide user symbols"),
1031 OPT_BOOLEAN(0, "tui", &use_tui, "Use the TUI interface"),
1032 OPT_BOOLEAN(0, "stdio", &use_stdio, "Use the stdio interface"),
1033 OPT_INCR('v', "verbose", &verbose,
1034 "be more verbose (show counter open errors, etc)"),
1035 OPT_END()
1036 };
1037
1038 int cmd_top(int argc, const char **argv, const char *prefix __used)
1039 {
1040 struct perf_evsel *pos;
1041 int status = -ENOMEM;
1042
1043 top.evlist = perf_evlist__new(NULL, NULL);
1044 if (top.evlist == NULL)
1045 return -ENOMEM;
1046
1047 page_size = sysconf(_SC_PAGE_SIZE);
1048
1049 argc = parse_options(argc, argv, options, top_usage, 0);
1050 if (argc)
1051 usage_with_options(top_usage, options);
1052
1053 /*
1054 * XXX For now start disabled, only using TUI if explicitely asked for.
1055 * Change that when handle_keys equivalent gets written, live annotation
1056 * done, etc.
1057 */
1058 use_browser = 0;
1059
1060 if (use_stdio)
1061 use_browser = 0;
1062 else if (use_tui)
1063 use_browser = 1;
1064
1065 setup_browser(false);
1066
1067 /* CPU and PID are mutually exclusive */
1068 if (top.target_tid > 0 && top.cpu_list) {
1069 printf("WARNING: PID switch overriding CPU\n");
1070 sleep(1);
1071 top.cpu_list = NULL;
1072 }
1073
1074 if (top.target_pid != -1)
1075 top.target_tid = top.target_pid;
1076
1077 if (perf_evlist__create_maps(top.evlist, top.target_pid,
1078 top.target_tid, top.cpu_list) < 0)
1079 usage_with_options(top_usage, options);
1080
1081 if (!top.evlist->nr_entries &&
1082 perf_evlist__add_default(top.evlist) < 0) {
1083 pr_err("Not enough memory for event selector list\n");
1084 return -ENOMEM;
1085 }
1086
1087 if (top.delay_secs < 1)
1088 top.delay_secs = 1;
1089
1090 /*
1091 * User specified count overrides default frequency.
1092 */
1093 if (default_interval)
1094 top.freq = 0;
1095 else if (top.freq) {
1096 default_interval = top.freq;
1097 } else {
1098 fprintf(stderr, "frequency and count are zero, aborting\n");
1099 exit(EXIT_FAILURE);
1100 }
1101
1102 list_for_each_entry(pos, &top.evlist->entries, node) {
1103 if (perf_evsel__alloc_fd(pos, top.evlist->cpus->nr,
1104 top.evlist->threads->nr) < 0)
1105 goto out_free_fd;
1106 /*
1107 * Fill in the ones not specifically initialized via -c:
1108 */
1109 if (pos->attr.sample_period)
1110 continue;
1111
1112 pos->attr.sample_period = default_interval;
1113 }
1114
1115 if (perf_evlist__alloc_pollfd(top.evlist) < 0 ||
1116 perf_evlist__alloc_mmap(top.evlist) < 0)
1117 goto out_free_fd;
1118
1119 top.sym_evsel = list_entry(top.evlist->entries.next, struct perf_evsel, node);
1120
1121 symbol_conf.priv_size = (sizeof(struct sym_entry) + sizeof(struct annotation) +
1122 (top.evlist->nr_entries + 1) * sizeof(unsigned long));
1123
1124 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1125 if (symbol__init() < 0)
1126 return -1;
1127
1128 get_term_dimensions(&winsize);
1129 if (top.print_entries == 0) {
1130 update_print_entries(&winsize);
1131 signal(SIGWINCH, sig_winch_handler);
1132 }
1133
1134 status = __cmd_top();
1135 out_free_fd:
1136 perf_evlist__delete(top.evlist);
1137
1138 return status;
1139 }
linux-next