?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
fs/ext4/inode.c: use pr_warn_ratelimited()
[linux/fpc-iii.git] / tools / perf / builtin-top.c
blob6ce4042421bd92b1574f50409cf60f506675ddfd
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/color.h"
24 #include "util/evsel.h"
25 #include "util/session.h"
26 #include "util/symbol.h"
27 #include "util/thread.h"
28 #include "util/util.h"
29 #include <linux/rbtree.h>
30 #include "util/parse-options.h"
31 #include "util/parse-events.h"
32 #include "util/cpumap.h"
33 #include "util/xyarray.h"
34
35 #include "util/debug.h"
36
37 #include <assert.h>
38 #include <fcntl.h>
39
40 #include <stdio.h>
41 #include <termios.h>
42 #include <unistd.h>
43
44 #include <errno.h>
45 #include <time.h>
46 #include <sched.h>
47 #include <pthread.h>
48
49 #include <sys/syscall.h>
50 #include <sys/ioctl.h>
51 #include <sys/poll.h>
52 #include <sys/prctl.h>
53 #include <sys/wait.h>
54 #include <sys/uio.h>
55 #include <sys/mman.h>
56
57 #include <linux/unistd.h>
58 #include <linux/types.h>
59
60 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
61
62 static bool system_wide = false;
63
64 static int default_interval = 0;
65
66 static int count_filter = 5;
67 static int print_entries;
68
69 static int target_pid = -1;
70 static int target_tid = -1;
71 static struct thread_map *threads;
72 static bool inherit = false;
73 static struct cpu_map *cpus;
74 static int realtime_prio = 0;
75 static bool group = false;
76 static unsigned int page_size;
77 static unsigned int mmap_pages = 16;
78 static int freq = 1000; /* 1 KHz */
79
80 static int delay_secs = 2;
81 static bool zero = false;
82 static bool dump_symtab = false;
83
84 static bool hide_kernel_symbols = false;
85 static bool hide_user_symbols = false;
86 static struct winsize winsize;
87
88 /*
89 * Source
90 */
91
92 struct source_line {
93 u64 eip;
94 unsigned long count[MAX_COUNTERS];
95 char *line;
96 struct source_line *next;
97 };
98
99 static const char *sym_filter = NULL;
100 struct sym_entry *sym_filter_entry = NULL;
101 struct sym_entry *sym_filter_entry_sched = NULL;
102 static int sym_pcnt_filter = 5;
103 static int sym_counter = 0;
104 static struct perf_evsel *sym_evsel = NULL;
105 static int display_weighted = -1;
106 static const char *cpu_list;
107
108 /*
109 * Symbols
110 */
111
112 struct sym_entry_source {
113 struct source_line *source;
114 struct source_line *lines;
115 struct source_line **lines_tail;
116 pthread_mutex_t lock;
117 };
118
119 struct sym_entry {
120 struct rb_node rb_node;
121 struct list_head node;
122 unsigned long snap_count;
123 double weight;
124 int skip;
125 u16 name_len;
126 u8 origin;
127 struct map *map;
128 struct sym_entry_source *src;
129 unsigned long count[0];
130 };
131
132 /*
133 * Source functions
134 */
135
136 static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
137 {
138 return ((void *)self) + symbol_conf.priv_size;
139 }
140
141 void get_term_dimensions(struct winsize *ws)
142 {
143 char *s = getenv("LINES");
144
145 if (s != NULL) {
146 ws->ws_row = atoi(s);
147 s = getenv("COLUMNS");
148 if (s != NULL) {
149 ws->ws_col = atoi(s);
150 if (ws->ws_row && ws->ws_col)
151 return;
152 }
153 }
154 #ifdef TIOCGWINSZ
155 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
156 ws->ws_row && ws->ws_col)
157 return;
158 #endif
159 ws->ws_row = 25;
160 ws->ws_col = 80;
161 }
162
163 static void update_print_entries(struct winsize *ws)
164 {
165 print_entries = ws->ws_row;
166
167 if (print_entries > 9)
168 print_entries -= 9;
169 }
170
171 static void sig_winch_handler(int sig __used)
172 {
173 get_term_dimensions(&winsize);
174 update_print_entries(&winsize);
175 }
176
177 static int parse_source(struct sym_entry *syme)
178 {
179 struct symbol *sym;
180 struct sym_entry_source *source;
181 struct map *map;
182 FILE *file;
183 char command[PATH_MAX*2];
184 const char *path;
185 u64 len;
186
187 if (!syme)
188 return -1;
189
190 sym = sym_entry__symbol(syme);
191 map = syme->map;
192
193 /*
194 * We can't annotate with just /proc/kallsyms
195 */
196 if (map->dso->origin == DSO__ORIG_KERNEL)
197 return -1;
198
199 if (syme->src == NULL) {
200 syme->src = zalloc(sizeof(*source));
201 if (syme->src == NULL)
202 return -1;
203 pthread_mutex_init(&syme->src->lock, NULL);
204 }
205
206 source = syme->src;
207
208 if (source->lines) {
209 pthread_mutex_lock(&source->lock);
210 goto out_assign;
211 }
212 path = map->dso->long_name;
213
214 len = sym->end - sym->start;
215
216 sprintf(command,
217 "objdump --start-address=%#0*Lx --stop-address=%#0*Lx -dS %s",
218 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
219 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
220
221 file = popen(command, "r");
222 if (!file)
223 return -1;
224
225 pthread_mutex_lock(&source->lock);
226 source->lines_tail = &source->lines;
227 while (!feof(file)) {
228 struct source_line *src;
229 size_t dummy = 0;
230 char *c, *sep;
231
232 src = malloc(sizeof(struct source_line));
233 assert(src != NULL);
234 memset(src, 0, sizeof(struct source_line));
235
236 if (getline(&src->line, &dummy, file) < 0)
237 break;
238 if (!src->line)
239 break;
240
241 c = strchr(src->line, '\n');
242 if (c)
243 *c = 0;
244
245 src->next = NULL;
246 *source->lines_tail = src;
247 source->lines_tail = &src->next;
248
249 src->eip = strtoull(src->line, &sep, 16);
250 if (*sep == ':')
251 src->eip = map__objdump_2ip(map, src->eip);
252 else /* this line has no ip info (e.g. source line) */
253 src->eip = 0;
254 }
255 pclose(file);
256 out_assign:
257 sym_filter_entry = syme;
258 pthread_mutex_unlock(&source->lock);
259 return 0;
260 }
261
262 static void __zero_source_counters(struct sym_entry *syme)
263 {
264 int i;
265 struct source_line *line;
266
267 line = syme->src->lines;
268 while (line) {
269 for (i = 0; i < nr_counters; i++)
270 line->count[i] = 0;
271 line = line->next;
272 }
273 }
274
275 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
276 {
277 struct source_line *line;
278
279 if (syme != sym_filter_entry)
280 return;
281
282 if (pthread_mutex_trylock(&syme->src->lock))
283 return;
284
285 if (syme->src == NULL || syme->src->source == NULL)
286 goto out_unlock;
287
288 for (line = syme->src->lines; line; line = line->next) {
289 /* skip lines without IP info */
290 if (line->eip == 0)
291 continue;
292 if (line->eip == ip) {
293 line->count[counter]++;
294 break;
295 }
296 if (line->eip > ip)
297 break;
298 }
299 out_unlock:
300 pthread_mutex_unlock(&syme->src->lock);
301 }
302
303 #define PATTERN_LEN (BITS_PER_LONG / 4 + 2)
304
305 static void lookup_sym_source(struct sym_entry *syme)
306 {
307 struct symbol *symbol = sym_entry__symbol(syme);
308 struct source_line *line;
309 char pattern[PATTERN_LEN + 1];
310
311 sprintf(pattern, "%0*Lx <", BITS_PER_LONG / 4,
312 map__rip_2objdump(syme->map, symbol->start));
313
314 pthread_mutex_lock(&syme->src->lock);
315 for (line = syme->src->lines; line; line = line->next) {
316 if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
317 syme->src->source = line;
318 break;
319 }
320 }
321 pthread_mutex_unlock(&syme->src->lock);
322 }
323
324 static void show_lines(struct source_line *queue, int count, int total)
325 {
326 int i;
327 struct source_line *line;
328
329 line = queue;
330 for (i = 0; i < count; i++) {
331 float pcnt = 100.0*(float)line->count[sym_counter]/(float)total;
332
333 printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line);
334 line = line->next;
335 }
336 }
337
338 #define TRACE_COUNT 3
339
340 static void show_details(struct sym_entry *syme)
341 {
342 struct symbol *symbol;
343 struct source_line *line;
344 struct source_line *line_queue = NULL;
345 int displayed = 0;
346 int line_queue_count = 0, total = 0, more = 0;
347
348 if (!syme)
349 return;
350
351 if (!syme->src->source)
352 lookup_sym_source(syme);
353
354 if (!syme->src->source)
355 return;
356
357 symbol = sym_entry__symbol(syme);
358 printf("Showing %s for %s\n", event_name(sym_evsel), symbol->name);
359 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
360
361 pthread_mutex_lock(&syme->src->lock);
362 line = syme->src->source;
363 while (line) {
364 total += line->count[sym_counter];
365 line = line->next;
366 }
367
368 line = syme->src->source;
369 while (line) {
370 float pcnt = 0.0;
371
372 if (!line_queue_count)
373 line_queue = line;
374 line_queue_count++;
375
376 if (line->count[sym_counter])
377 pcnt = 100.0 * line->count[sym_counter] / (float)total;
378 if (pcnt >= (float)sym_pcnt_filter) {
379 if (displayed <= print_entries)
380 show_lines(line_queue, line_queue_count, total);
381 else more++;
382 displayed += line_queue_count;
383 line_queue_count = 0;
384 line_queue = NULL;
385 } else if (line_queue_count > TRACE_COUNT) {
386 line_queue = line_queue->next;
387 line_queue_count--;
388 }
389
390 line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
391 line = line->next;
392 }
393 pthread_mutex_unlock(&syme->src->lock);
394 if (more)
395 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
396 }
397
398 /*
399 * Symbols will be added here in event__process_sample and will get out
400 * after decayed.
401 */
402 static LIST_HEAD(active_symbols);
403 static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
404
405 /*
406 * Ordering weight: count-1 * count-2 * ... / count-n
407 */
408 static double sym_weight(const struct sym_entry *sym)
409 {
410 double weight = sym->snap_count;
411 int counter;
412
413 if (!display_weighted)
414 return weight;
415
416 for (counter = 1; counter < nr_counters-1; counter++)
417 weight *= sym->count[counter];
418
419 weight /= (sym->count[counter] + 1);
420
421 return weight;
422 }
423
424 static long samples;
425 static long kernel_samples, us_samples;
426 static long exact_samples;
427 static long guest_us_samples, guest_kernel_samples;
428 static const char CONSOLE_CLEAR[] = "\e[H\e[2J";
429
430 static void __list_insert_active_sym(struct sym_entry *syme)
431 {
432 list_add(&syme->node, &active_symbols);
433 }
434
435 static void list_remove_active_sym(struct sym_entry *syme)
436 {
437 pthread_mutex_lock(&active_symbols_lock);
438 list_del_init(&syme->node);
439 pthread_mutex_unlock(&active_symbols_lock);
440 }
441
442 static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
443 {
444 struct rb_node **p = &tree->rb_node;
445 struct rb_node *parent = NULL;
446 struct sym_entry *iter;
447
448 while (*p != NULL) {
449 parent = *p;
450 iter = rb_entry(parent, struct sym_entry, rb_node);
451
452 if (se->weight > iter->weight)
453 p = &(*p)->rb_left;
454 else
455 p = &(*p)->rb_right;
456 }
457
458 rb_link_node(&se->rb_node, parent, p);
459 rb_insert_color(&se->rb_node, tree);
460 }
461
462 static void print_sym_table(void)
463 {
464 int printed = 0, j;
465 struct perf_evsel *counter;
466 int snap = !display_weighted ? sym_counter : 0;
467 float samples_per_sec = samples/delay_secs;
468 float ksamples_per_sec = kernel_samples/delay_secs;
469 float us_samples_per_sec = (us_samples)/delay_secs;
470 float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
471 float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
472 float esamples_percent = (100.0*exact_samples)/samples;
473 float sum_ksamples = 0.0;
474 struct sym_entry *syme, *n;
475 struct rb_root tmp = RB_ROOT;
476 struct rb_node *nd;
477 int sym_width = 0, dso_width = 0, dso_short_width = 0;
478 const int win_width = winsize.ws_col - 1;
479
480 samples = us_samples = kernel_samples = exact_samples = 0;
481 guest_kernel_samples = guest_us_samples = 0;
482
483 /* Sort the active symbols */
484 pthread_mutex_lock(&active_symbols_lock);
485 syme = list_entry(active_symbols.next, struct sym_entry, node);
486 pthread_mutex_unlock(&active_symbols_lock);
487
488 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
489 syme->snap_count = syme->count[snap];
490 if (syme->snap_count != 0) {
491
492 if ((hide_user_symbols &&
493 syme->origin == PERF_RECORD_MISC_USER) ||
494 (hide_kernel_symbols &&
495 syme->origin == PERF_RECORD_MISC_KERNEL)) {
496 list_remove_active_sym(syme);
497 continue;
498 }
499 syme->weight = sym_weight(syme);
500 rb_insert_active_sym(&tmp, syme);
501 sum_ksamples += syme->snap_count;
502
503 for (j = 0; j < nr_counters; j++)
504 syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
505 } else
506 list_remove_active_sym(syme);
507 }
508
509 puts(CONSOLE_CLEAR);
510
511 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
512 if (!perf_guest) {
513 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
514 " exact: %4.1f%% [",
515 samples_per_sec,
516 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
517 samples_per_sec)),
518 esamples_percent);
519 } else {
520 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
521 " guest kernel:%4.1f%% guest us:%4.1f%%"
522 " exact: %4.1f%% [",
523 samples_per_sec,
524 100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
525 samples_per_sec)),
526 100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
527 samples_per_sec)),
528 100.0 - (100.0 * ((samples_per_sec -
529 guest_kernel_samples_per_sec) /
530 samples_per_sec)),
531 100.0 - (100.0 * ((samples_per_sec -
532 guest_us_samples_per_sec) /
533 samples_per_sec)),
534 esamples_percent);
535 }
536
537 if (nr_counters == 1 || !display_weighted) {
538 struct perf_evsel *first;
539 first = list_entry(evsel_list.next, struct perf_evsel, node);
540 printf("%Ld", first->attr.sample_period);
541 if (freq)
542 printf("Hz ");
543 else
544 printf(" ");
545 }
546
547 if (!display_weighted)
548 printf("%s", event_name(sym_evsel));
549 else list_for_each_entry(counter, &evsel_list, node) {
550 if (counter->idx)
551 printf("/");
552
553 printf("%s", event_name(counter));
554 }
555
556 printf( "], ");
557
558 if (target_pid != -1)
559 printf(" (target_pid: %d", target_pid);
560 else if (target_tid != -1)
561 printf(" (target_tid: %d", target_tid);
562 else
563 printf(" (all");
564
565 if (cpu_list)
566 printf(", CPU%s: %s)\n", cpus->nr > 1 ? "s" : "", cpu_list);
567 else {
568 if (target_tid != -1)
569 printf(")\n");
570 else
571 printf(", %d CPU%s)\n", cpus->nr, cpus->nr > 1 ? "s" : "");
572 }
573
574 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
575
576 if (sym_filter_entry) {
577 show_details(sym_filter_entry);
578 return;
579 }
580
581 /*
582 * Find the longest symbol name that will be displayed
583 */
584 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
585 syme = rb_entry(nd, struct sym_entry, rb_node);
586 if (++printed > print_entries ||
587 (int)syme->snap_count < count_filter)
588 continue;
589
590 if (syme->map->dso->long_name_len > dso_width)
591 dso_width = syme->map->dso->long_name_len;
592
593 if (syme->map->dso->short_name_len > dso_short_width)
594 dso_short_width = syme->map->dso->short_name_len;
595
596 if (syme->name_len > sym_width)
597 sym_width = syme->name_len;
598 }
599
600 printed = 0;
601
602 if (sym_width + dso_width > winsize.ws_col - 29) {
603 dso_width = dso_short_width;
604 if (sym_width + dso_width > winsize.ws_col - 29)
605 sym_width = winsize.ws_col - dso_width - 29;
606 }
607 putchar('\n');
608 if (nr_counters == 1)
609 printf(" samples pcnt");
610 else
611 printf(" weight samples pcnt");
612
613 if (verbose)
614 printf(" RIP ");
615 printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
616 printf(" %s _______ _____",
617 nr_counters == 1 ? " " : "______");
618 if (verbose)
619 printf(" ________________");
620 printf(" %-*.*s", sym_width, sym_width, graph_line);
621 printf(" %-*.*s", dso_width, dso_width, graph_line);
622 puts("\n");
623
624 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
625 struct symbol *sym;
626 double pcnt;
627
628 syme = rb_entry(nd, struct sym_entry, rb_node);
629 sym = sym_entry__symbol(syme);
630 if (++printed > print_entries || (int)syme->snap_count < count_filter)
631 continue;
632
633 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
634 sum_ksamples));
635
636 if (nr_counters == 1 || !display_weighted)
637 printf("%20.2f ", syme->weight);
638 else
639 printf("%9.1f %10ld ", syme->weight, syme->snap_count);
640
641 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
642 if (verbose)
643 printf(" %016llx", sym->start);
644 printf(" %-*.*s", sym_width, sym_width, sym->name);
645 printf(" %-*.*s\n", dso_width, dso_width,
646 dso_width >= syme->map->dso->long_name_len ?
647 syme->map->dso->long_name :
648 syme->map->dso->short_name);
649 }
650 }
651
652 static void prompt_integer(int *target, const char *msg)
653 {
654 char *buf = malloc(0), *p;
655 size_t dummy = 0;
656 int tmp;
657
658 fprintf(stdout, "\n%s: ", msg);
659 if (getline(&buf, &dummy, stdin) < 0)
660 return;
661
662 p = strchr(buf, '\n');
663 if (p)
664 *p = 0;
665
666 p = buf;
667 while(*p) {
668 if (!isdigit(*p))
669 goto out_free;
670 p++;
671 }
672 tmp = strtoul(buf, NULL, 10);
673 *target = tmp;
674 out_free:
675 free(buf);
676 }
677
678 static void prompt_percent(int *target, const char *msg)
679 {
680 int tmp = 0;
681
682 prompt_integer(&tmp, msg);
683 if (tmp >= 0 && tmp <= 100)
684 *target = tmp;
685 }
686
687 static void prompt_symbol(struct sym_entry **target, const char *msg)
688 {
689 char *buf = malloc(0), *p;
690 struct sym_entry *syme = *target, *n, *found = NULL;
691 size_t dummy = 0;
692
693 /* zero counters of active symbol */
694 if (syme) {
695 pthread_mutex_lock(&syme->src->lock);
696 __zero_source_counters(syme);
697 *target = NULL;
698 pthread_mutex_unlock(&syme->src->lock);
699 }
700
701 fprintf(stdout, "\n%s: ", msg);
702 if (getline(&buf, &dummy, stdin) < 0)
703 goto out_free;
704
705 p = strchr(buf, '\n');
706 if (p)
707 *p = 0;
708
709 pthread_mutex_lock(&active_symbols_lock);
710 syme = list_entry(active_symbols.next, struct sym_entry, node);
711 pthread_mutex_unlock(&active_symbols_lock);
712
713 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
714 struct symbol *sym = sym_entry__symbol(syme);
715
716 if (!strcmp(buf, sym->name)) {
717 found = syme;
718 break;
719 }
720 }
721
722 if (!found) {
723 fprintf(stderr, "Sorry, %s is not active.\n", buf);
724 sleep(1);
725 return;
726 } else
727 parse_source(found);
728
729 out_free:
730 free(buf);
731 }
732
733 static void print_mapped_keys(void)
734 {
735 char *name = NULL;
736
737 if (sym_filter_entry) {
738 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
739 name = sym->name;
740 }
741
742 fprintf(stdout, "\nMapped keys:\n");
743 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs);
744 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries);
745
746 if (nr_counters > 1)
747 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_evsel));
748
749 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
750
751 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
752 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
753 fprintf(stdout, "\t[S] stop annotation.\n");
754
755 if (nr_counters > 1)
756 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
757
758 fprintf(stdout,
759 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
760 hide_kernel_symbols ? "yes" : "no");
761 fprintf(stdout,
762 "\t[U] hide user symbols. \t(%s)\n",
763 hide_user_symbols ? "yes" : "no");
764 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
765 fprintf(stdout, "\t[qQ] quit.\n");
766 }
767
768 static int key_mapped(int c)
769 {
770 switch (c) {
771 case 'd':
772 case 'e':
773 case 'f':
774 case 'z':
775 case 'q':
776 case 'Q':
777 case 'K':
778 case 'U':
779 case 'F':
780 case 's':
781 case 'S':
782 return 1;
783 case 'E':
784 case 'w':
785 return nr_counters > 1 ? 1 : 0;
786 default:
787 break;
788 }
789
790 return 0;
791 }
792
793 static void handle_keypress(struct perf_session *session, int c)
794 {
795 if (!key_mapped(c)) {
796 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
797 struct termios tc, save;
798
799 print_mapped_keys();
800 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
801 fflush(stdout);
802
803 tcgetattr(0, &save);
804 tc = save;
805 tc.c_lflag &= ~(ICANON | ECHO);
806 tc.c_cc[VMIN] = 0;
807 tc.c_cc[VTIME] = 0;
808 tcsetattr(0, TCSANOW, &tc);
809
810 poll(&stdin_poll, 1, -1);
811 c = getc(stdin);
812
813 tcsetattr(0, TCSAFLUSH, &save);
814 if (!key_mapped(c))
815 return;
816 }
817
818 switch (c) {
819 case 'd':
820 prompt_integer(&delay_secs, "Enter display delay");
821 if (delay_secs < 1)
822 delay_secs = 1;
823 break;
824 case 'e':
825 prompt_integer(&print_entries, "Enter display entries (lines)");
826 if (print_entries == 0) {
827 sig_winch_handler(SIGWINCH);
828 signal(SIGWINCH, sig_winch_handler);
829 } else
830 signal(SIGWINCH, SIG_DFL);
831 break;
832 case 'E':
833 if (nr_counters > 1) {
834 fprintf(stderr, "\nAvailable events:");
835
836 list_for_each_entry(sym_evsel, &evsel_list, node)
837 fprintf(stderr, "\n\t%d %s", sym_evsel->idx, event_name(sym_evsel));
838
839 prompt_integer(&sym_counter, "Enter details event counter");
840
841 if (sym_counter >= nr_counters) {
842 sym_evsel = list_entry(evsel_list.next, struct perf_evsel, node);
843 sym_counter = 0;
844 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(sym_evsel));
845 sleep(1);
846 break;
847 }
848 list_for_each_entry(sym_evsel, &evsel_list, node)
849 if (sym_evsel->idx == sym_counter)
850 break;
851 } else sym_counter = 0;
852 break;
853 case 'f':
854 prompt_integer(&count_filter, "Enter display event count filter");
855 break;
856 case 'F':
857 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
858 break;
859 case 'K':
860 hide_kernel_symbols = !hide_kernel_symbols;
861 break;
862 case 'q':
863 case 'Q':
864 printf("exiting.\n");
865 if (dump_symtab)
866 perf_session__fprintf_dsos(session, stderr);
867 exit(0);
868 case 's':
869 prompt_symbol(&sym_filter_entry, "Enter details symbol");
870 break;
871 case 'S':
872 if (!sym_filter_entry)
873 break;
874 else {
875 struct sym_entry *syme = sym_filter_entry;
876
877 pthread_mutex_lock(&syme->src->lock);
878 sym_filter_entry = NULL;
879 __zero_source_counters(syme);
880 pthread_mutex_unlock(&syme->src->lock);
881 }
882 break;
883 case 'U':
884 hide_user_symbols = !hide_user_symbols;
885 break;
886 case 'w':
887 display_weighted = ~display_weighted;
888 break;
889 case 'z':
890 zero = !zero;
891 break;
892 default:
893 break;
894 }
895 }
896
897 static void *display_thread(void *arg __used)
898 {
899 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
900 struct termios tc, save;
901 int delay_msecs, c;
902 struct perf_session *session = (struct perf_session *) arg;
903
904 tcgetattr(0, &save);
905 tc = save;
906 tc.c_lflag &= ~(ICANON | ECHO);
907 tc.c_cc[VMIN] = 0;
908 tc.c_cc[VTIME] = 0;
909
910 repeat:
911 delay_msecs = delay_secs * 1000;
912 tcsetattr(0, TCSANOW, &tc);
913 /* trash return*/
914 getc(stdin);
915
916 do {
917 print_sym_table();
918 } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
919
920 c = getc(stdin);
921 tcsetattr(0, TCSAFLUSH, &save);
922
923 handle_keypress(session, c);
924 goto repeat;
925
926 return NULL;
927 }
928
929 /* Tag samples to be skipped. */
930 static const char *skip_symbols[] = {
931 "default_idle",
932 "cpu_idle",
933 "enter_idle",
934 "exit_idle",
935 "mwait_idle",
936 "mwait_idle_with_hints",
937 "poll_idle",
938 "ppc64_runlatch_off",
939 "pseries_dedicated_idle_sleep",
940 NULL
941 };
942
943 static int symbol_filter(struct map *map, struct symbol *sym)
944 {
945 struct sym_entry *syme;
946 const char *name = sym->name;
947 int i;
948
949 /*
950 * ppc64 uses function descriptors and appends a '.' to the
951 * start of every instruction address. Remove it.
952 */
953 if (name[0] == '.')
954 name++;
955
956 if (!strcmp(name, "_text") ||
957 !strcmp(name, "_etext") ||
958 !strcmp(name, "_sinittext") ||
959 !strncmp("init_module", name, 11) ||
960 !strncmp("cleanup_module", name, 14) ||
961 strstr(name, "_text_start") ||
962 strstr(name, "_text_end"))
963 return 1;
964
965 syme = symbol__priv(sym);
966 syme->map = map;
967 syme->src = NULL;
968
969 if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
970 /* schedule initial sym_filter_entry setup */
971 sym_filter_entry_sched = syme;
972 sym_filter = NULL;
973 }
974
975 for (i = 0; skip_symbols[i]; i++) {
976 if (!strcmp(skip_symbols[i], name)) {
977 syme->skip = 1;
978 break;
979 }
980 }
981
982 if (!syme->skip)
983 syme->name_len = strlen(sym->name);
984
985 return 0;
986 }
987
988 static void event__process_sample(const event_t *self,
989 struct sample_data *sample,
990 struct perf_session *session,
991 struct perf_evsel *evsel)
992 {
993 u64 ip = self->ip.ip;
994 struct sym_entry *syme;
995 struct addr_location al;
996 struct machine *machine;
997 u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
998
999 ++samples;
1000
1001 switch (origin) {
1002 case PERF_RECORD_MISC_USER:
1003 ++us_samples;
1004 if (hide_user_symbols)
1005 return;
1006 machine = perf_session__find_host_machine(session);
1007 break;
1008 case PERF_RECORD_MISC_KERNEL:
1009 ++kernel_samples;
1010 if (hide_kernel_symbols)
1011 return;
1012 machine = perf_session__find_host_machine(session);
1013 break;
1014 case PERF_RECORD_MISC_GUEST_KERNEL:
1015 ++guest_kernel_samples;
1016 machine = perf_session__find_machine(session, self->ip.pid);
1017 break;
1018 case PERF_RECORD_MISC_GUEST_USER:
1019 ++guest_us_samples;
1020 /*
1021 * TODO: we don't process guest user from host side
1022 * except simple counting.
1023 */
1024 return;
1025 default:
1026 return;
1027 }
1028
1029 if (!machine && perf_guest) {
1030 pr_err("Can't find guest [%d]'s kernel information\n",
1031 self->ip.pid);
1032 return;
1033 }
1034
1035 if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
1036 exact_samples++;
1037
1038 if (event__preprocess_sample(self, session, &al, sample,
1039 symbol_filter) < 0 ||
1040 al.filtered)
1041 return;
1042
1043 if (al.sym == NULL) {
1044 /*
1045 * As we do lazy loading of symtabs we only will know if the
1046 * specified vmlinux file is invalid when we actually have a
1047 * hit in kernel space and then try to load it. So if we get
1048 * here and there are _no_ symbols in the DSO backing the
1049 * kernel map, bail out.
1050 *
1051 * We may never get here, for instance, if we use -K/
1052 * --hide-kernel-symbols, even if the user specifies an
1053 * invalid --vmlinux ;-)
1054 */
1055 if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
1056 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
1057 pr_err("The %s file can't be used\n",
1058 symbol_conf.vmlinux_name);
1059 exit(1);
1060 }
1061
1062 return;
1063 }
1064
1065 /* let's see, whether we need to install initial sym_filter_entry */
1066 if (sym_filter_entry_sched) {
1067 sym_filter_entry = sym_filter_entry_sched;
1068 sym_filter_entry_sched = NULL;
1069 if (parse_source(sym_filter_entry) < 0) {
1070 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
1071
1072 pr_err("Can't annotate %s", sym->name);
1073 if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
1074 pr_err(": No vmlinux file was found in the path:\n");
1075 machine__fprintf_vmlinux_path(machine, stderr);
1076 } else
1077 pr_err(".\n");
1078 exit(1);
1079 }
1080 }
1081
1082 syme = symbol__priv(al.sym);
1083 if (!syme->skip) {
1084 syme->count[evsel->idx]++;
1085 syme->origin = origin;
1086 record_precise_ip(syme, evsel->idx, ip);
1087 pthread_mutex_lock(&active_symbols_lock);
1088 if (list_empty(&syme->node) || !syme->node.next)
1089 __list_insert_active_sym(syme);
1090 pthread_mutex_unlock(&active_symbols_lock);
1091 }
1092 }
1093
1094 struct mmap_data {
1095 void *base;
1096 int mask;
1097 unsigned int prev;
1098 };
1099
1100 static int perf_evsel__alloc_mmap_per_thread(struct perf_evsel *evsel,
1101 int ncpus, int nthreads)
1102 {
1103 evsel->priv = xyarray__new(ncpus, nthreads, sizeof(struct mmap_data));
1104 return evsel->priv != NULL ? 0 : -ENOMEM;
1105 }
1106
1107 static void perf_evsel__free_mmap(struct perf_evsel *evsel)
1108 {
1109 xyarray__delete(evsel->priv);
1110 evsel->priv = NULL;
1111 }
1112
1113 static unsigned int mmap_read_head(struct mmap_data *md)
1114 {
1115 struct perf_event_mmap_page *pc = md->base;
1116 int head;
1117
1118 head = pc->data_head;
1119 rmb();
1120
1121 return head;
1122 }
1123
1124 static void perf_session__mmap_read_counter(struct perf_session *self,
1125 struct perf_evsel *evsel,
1126 int cpu, int thread_idx)
1127 {
1128 struct xyarray *mmap_array = evsel->priv;
1129 struct mmap_data *md = xyarray__entry(mmap_array, cpu, thread_idx);
1130 unsigned int head = mmap_read_head(md);
1131 unsigned int old = md->prev;
1132 unsigned char *data = md->base + page_size;
1133 struct sample_data sample;
1134 int diff;
1135
1136 /*
1137 * If we're further behind than half the buffer, there's a chance
1138 * the writer will bite our tail and mess up the samples under us.
1139 *
1140 * If we somehow ended up ahead of the head, we got messed up.
1141 *
1142 * In either case, truncate and restart at head.
1143 */
1144 diff = head - old;
1145 if (diff > md->mask / 2 || diff < 0) {
1146 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
1147
1148 /*
1149 * head points to a known good entry, start there.
1150 */
1151 old = head;
1152 }
1153
1154 for (; old != head;) {
1155 event_t *event = (event_t *)&data[old & md->mask];
1156
1157 event_t event_copy;
1158
1159 size_t size = event->header.size;
1160
1161 /*
1162 * Event straddles the mmap boundary -- header should always
1163 * be inside due to u64 alignment of output.
1164 */
1165 if ((old & md->mask) + size != ((old + size) & md->mask)) {
1166 unsigned int offset = old;
1167 unsigned int len = min(sizeof(*event), size), cpy;
1168 void *dst = &event_copy;
1169
1170 do {
1171 cpy = min(md->mask + 1 - (offset & md->mask), len);
1172 memcpy(dst, &data[offset & md->mask], cpy);
1173 offset += cpy;
1174 dst += cpy;
1175 len -= cpy;
1176 } while (len);
1177
1178 event = &event_copy;
1179 }
1180
1181 event__parse_sample(event, self, &sample);
1182 if (event->header.type == PERF_RECORD_SAMPLE)
1183 event__process_sample(event, &sample, self, evsel);
1184 else
1185 event__process(event, &sample, self);
1186 old += size;
1187 }
1188
1189 md->prev = old;
1190 }
1191
1192 static struct pollfd *event_array;
1193
1194 static void perf_session__mmap_read(struct perf_session *self)
1195 {
1196 struct perf_evsel *counter;
1197 int i, thread_index;
1198
1199 for (i = 0; i < cpus->nr; i++) {
1200 list_for_each_entry(counter, &evsel_list, node) {
1201 for (thread_index = 0;
1202 thread_index < threads->nr;
1203 thread_index++) {
1204 perf_session__mmap_read_counter(self,
1205 counter, i, thread_index);
1206 }
1207 }
1208 }
1209 }
1210
1211 int nr_poll;
1212 int group_fd;
1213
1214 static void start_counter(int i, struct perf_evsel *evsel)
1215 {
1216 struct xyarray *mmap_array = evsel->priv;
1217 struct mmap_data *mm;
1218 struct perf_event_attr *attr;
1219 int cpu = -1;
1220 int thread_index;
1221
1222 if (target_tid == -1)
1223 cpu = cpus->map[i];
1224
1225 attr = &evsel->attr;
1226
1227 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
1228
1229 if (freq) {
1230 attr->sample_type |= PERF_SAMPLE_PERIOD;
1231 attr->freq = 1;
1232 attr->sample_freq = freq;
1233 }
1234
1235 attr->inherit = (cpu < 0) && inherit;
1236 attr->mmap = 1;
1237
1238 for (thread_index = 0; thread_index < threads->nr; thread_index++) {
1239 try_again:
1240 FD(evsel, i, thread_index) = sys_perf_event_open(attr,
1241 threads->map[thread_index], cpu, group_fd, 0);
1242
1243 if (FD(evsel, i, thread_index) < 0) {
1244 int err = errno;
1245
1246 if (err == EPERM || err == EACCES)
1247 die("Permission error - are you root?\n"
1248 "\t Consider tweaking"
1249 " /proc/sys/kernel/perf_event_paranoid.\n");
1250 if (err == ENOENT)
1251 die("%s event is not supported. ", event_name(evsel));
1252 /*
1253 * If it's cycles then fall back to hrtimer
1254 * based cpu-clock-tick sw counter, which
1255 * is always available even if no PMU support:
1256 */
1257 if (attr->type == PERF_TYPE_HARDWARE
1258 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
1259
1260 if (verbose)
1261 warning(" ... trying to fall back to cpu-clock-ticks\n");
1262
1263 attr->type = PERF_TYPE_SOFTWARE;
1264 attr->config = PERF_COUNT_SW_CPU_CLOCK;
1265 goto try_again;
1266 }
1267 printf("\n");
1268 error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
1269 FD(evsel, i, thread_index), strerror(err));
1270 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
1271 exit(-1);
1272 }
1273 assert(FD(evsel, i, thread_index) >= 0);
1274 fcntl(FD(evsel, i, thread_index), F_SETFL, O_NONBLOCK);
1275
1276 /*
1277 * First counter acts as the group leader:
1278 */
1279 if (group && group_fd == -1)
1280 group_fd = FD(evsel, i, thread_index);
1281
1282 event_array[nr_poll].fd = FD(evsel, i, thread_index);
1283 event_array[nr_poll].events = POLLIN;
1284 nr_poll++;
1285
1286 mm = xyarray__entry(mmap_array, i, thread_index);
1287 mm->prev = 0;
1288 mm->mask = mmap_pages*page_size - 1;
1289 mm->base = mmap(NULL, (mmap_pages+1)*page_size,
1290 PROT_READ, MAP_SHARED, FD(evsel, i, thread_index), 0);
1291 if (mm->base == MAP_FAILED)
1292 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
1293 }
1294 }
1295
1296 static int __cmd_top(void)
1297 {
1298 pthread_t thread;
1299 struct perf_evsel *counter;
1300 int i, ret;
1301 /*
1302 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1303 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1304 */
1305 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1306 if (session == NULL)
1307 return -ENOMEM;
1308
1309 if (target_tid != -1)
1310 event__synthesize_thread(target_tid, event__process, session);
1311 else
1312 event__synthesize_threads(event__process, session);
1313
1314 for (i = 0; i < cpus->nr; i++) {
1315 group_fd = -1;
1316 list_for_each_entry(counter, &evsel_list, node)
1317 start_counter(i, counter);
1318 }
1319
1320 /* Wait for a minimal set of events before starting the snapshot */
1321 poll(&event_array[0], nr_poll, 100);
1322
1323 perf_session__mmap_read(session);
1324
1325 if (pthread_create(&thread, NULL, display_thread, session)) {
1326 printf("Could not create display thread.\n");
1327 exit(-1);
1328 }
1329
1330 if (realtime_prio) {
1331 struct sched_param param;
1332
1333 param.sched_priority = realtime_prio;
1334 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1335 printf("Could not set realtime priority.\n");
1336 exit(-1);
1337 }
1338 }
1339
1340 while (1) {
1341 int hits = samples;
1342
1343 perf_session__mmap_read(session);
1344
1345 if (hits == samples)
1346 ret = poll(event_array, nr_poll, 100);
1347 }
1348
1349 return 0;
1350 }
1351
1352 static const char * const top_usage[] = {
1353 "perf top [<options>]",
1354 NULL
1355 };
1356
1357 static const struct option options[] = {
1358 OPT_CALLBACK('e', "event", NULL, "event",
1359 "event selector. use 'perf list' to list available events",
1360 parse_events),
1361 OPT_INTEGER('c', "count", &default_interval,
1362 "event period to sample"),
1363 OPT_INTEGER('p', "pid", &target_pid,
1364 "profile events on existing process id"),
1365 OPT_INTEGER('t', "tid", &target_tid,
1366 "profile events on existing thread id"),
1367 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1368 "system-wide collection from all CPUs"),
1369 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1370 "list of cpus to monitor"),
1371 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1372 "file", "vmlinux pathname"),
1373 OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
1374 "hide kernel symbols"),
1375 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1376 OPT_INTEGER('r', "realtime", &realtime_prio,
1377 "collect data with this RT SCHED_FIFO priority"),
1378 OPT_INTEGER('d', "delay", &delay_secs,
1379 "number of seconds to delay between refreshes"),
1380 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1381 "dump the symbol table used for profiling"),
1382 OPT_INTEGER('f', "count-filter", &count_filter,
1383 "only display functions with more events than this"),
1384 OPT_BOOLEAN('g', "group", &group,
1385 "put the counters into a counter group"),
1386 OPT_BOOLEAN('i', "inherit", &inherit,
1387 "child tasks inherit counters"),
1388 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1389 "symbol to annotate"),
1390 OPT_BOOLEAN('z', "zero", &zero,
1391 "zero history across updates"),
1392 OPT_INTEGER('F', "freq", &freq,
1393 "profile at this frequency"),
1394 OPT_INTEGER('E', "entries", &print_entries,
1395 "display this many functions"),
1396 OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
1397 "hide user symbols"),
1398 OPT_INCR('v', "verbose", &verbose,
1399 "be more verbose (show counter open errors, etc)"),
1400 OPT_END()
1401 };
1402
1403 int cmd_top(int argc, const char **argv, const char *prefix __used)
1404 {
1405 struct perf_evsel *pos;
1406 int status = -ENOMEM;
1407
1408 page_size = sysconf(_SC_PAGE_SIZE);
1409
1410 argc = parse_options(argc, argv, options, top_usage, 0);
1411 if (argc)
1412 usage_with_options(top_usage, options);
1413
1414 if (target_pid != -1)
1415 target_tid = target_pid;
1416
1417 threads = thread_map__new(target_pid, target_tid);
1418 if (threads == NULL) {
1419 pr_err("Problems finding threads of monitor\n");
1420 usage_with_options(top_usage, options);
1421 }
1422
1423 event_array = malloc((sizeof(struct pollfd) *
1424 MAX_NR_CPUS * MAX_COUNTERS * threads->nr));
1425 if (!event_array)
1426 return -ENOMEM;
1427
1428 /* CPU and PID are mutually exclusive */
1429 if (target_tid > 0 && cpu_list) {
1430 printf("WARNING: PID switch overriding CPU\n");
1431 sleep(1);
1432 cpu_list = NULL;
1433 }
1434
1435 if (!nr_counters && perf_evsel_list__create_default() < 0) {
1436 pr_err("Not enough memory for event selector list\n");
1437 return -ENOMEM;
1438 }
1439
1440 if (delay_secs < 1)
1441 delay_secs = 1;
1442
1443 /*
1444 * User specified count overrides default frequency.
1445 */
1446 if (default_interval)
1447 freq = 0;
1448 else if (freq) {
1449 default_interval = freq;
1450 } else {
1451 fprintf(stderr, "frequency and count are zero, aborting\n");
1452 exit(EXIT_FAILURE);
1453 }
1454
1455 if (target_tid != -1)
1456 cpus = cpu_map__dummy_new();
1457 else
1458 cpus = cpu_map__new(cpu_list);
1459
1460 if (cpus == NULL)
1461 usage_with_options(top_usage, options);
1462
1463 list_for_each_entry(pos, &evsel_list, node) {
1464 if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, threads->nr) < 0 ||
1465 perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
1466 goto out_free_fd;
1467 /*
1468 * Fill in the ones not specifically initialized via -c:
1469 */
1470 if (pos->attr.sample_period)
1471 continue;
1472
1473 pos->attr.sample_period = default_interval;
1474 }
1475
1476 symbol_conf.priv_size = (sizeof(struct sym_entry) +
1477 (nr_counters + 1) * sizeof(unsigned long));
1478
1479 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1480 if (symbol__init() < 0)
1481 return -1;
1482
1483 get_term_dimensions(&winsize);
1484 if (print_entries == 0) {
1485 update_print_entries(&winsize);
1486 signal(SIGWINCH, sig_winch_handler);
1487 }
1488
1489 status = __cmd_top();
1490 out_free_fd:
1491 list_for_each_entry(pos, &evsel_list, node)
1492 perf_evsel__free_mmap(pos);
1493
1494 return status;
1495 }
Linux with added FPC-III support