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mm: fix dubious code in __count_immobile_pages()
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / tools / perf / builtin-top.c
blob5a29d9cd948621a9e357c27a156baa3bff8b5556
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 #include <inttypes.h>
44
45 #include <errno.h>
46 #include <time.h>
47 #include <sched.h>
48 #include <pthread.h>
49
50 #include <sys/syscall.h>
51 #include <sys/ioctl.h>
52 #include <sys/poll.h>
53 #include <sys/prctl.h>
54 #include <sys/wait.h>
55 #include <sys/uio.h>
56 #include <sys/mman.h>
57
58 #include <linux/unistd.h>
59 #include <linux/types.h>
60
61 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
62
63 static bool system_wide = false;
64
65 static int default_interval = 0;
66
67 static int count_filter = 5;
68 static int print_entries;
69
70 static int target_pid = -1;
71 static int target_tid = -1;
72 static struct thread_map *threads;
73 static bool inherit = false;
74 static struct cpu_map *cpus;
75 static int realtime_prio = 0;
76 static bool group = false;
77 static unsigned int page_size;
78 static unsigned int mmap_pages = 16;
79 static int freq = 1000; /* 1 KHz */
80
81 static int delay_secs = 2;
82 static bool zero = false;
83 static bool dump_symtab = false;
84
85 static bool hide_kernel_symbols = false;
86 static bool hide_user_symbols = false;
87 static struct winsize winsize;
88
89 /*
90 * Source
91 */
92
93 struct source_line {
94 u64 eip;
95 unsigned long count[MAX_COUNTERS];
96 char *line;
97 struct source_line *next;
98 };
99
100 static const char *sym_filter = NULL;
101 struct sym_entry *sym_filter_entry = NULL;
102 struct sym_entry *sym_filter_entry_sched = NULL;
103 static int sym_pcnt_filter = 5;
104 static int sym_counter = 0;
105 static struct perf_evsel *sym_evsel = NULL;
106 static int display_weighted = -1;
107 static const char *cpu_list;
108
109 /*
110 * Symbols
111 */
112
113 struct sym_entry_source {
114 struct source_line *source;
115 struct source_line *lines;
116 struct source_line **lines_tail;
117 pthread_mutex_t lock;
118 };
119
120 struct sym_entry {
121 struct rb_node rb_node;
122 struct list_head node;
123 unsigned long snap_count;
124 double weight;
125 int skip;
126 u16 name_len;
127 u8 origin;
128 struct map *map;
129 struct sym_entry_source *src;
130 unsigned long count[0];
131 };
132
133 /*
134 * Source functions
135 */
136
137 static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
138 {
139 return ((void *)self) + symbol_conf.priv_size;
140 }
141
142 void get_term_dimensions(struct winsize *ws)
143 {
144 char *s = getenv("LINES");
145
146 if (s != NULL) {
147 ws->ws_row = atoi(s);
148 s = getenv("COLUMNS");
149 if (s != NULL) {
150 ws->ws_col = atoi(s);
151 if (ws->ws_row && ws->ws_col)
152 return;
153 }
154 }
155 #ifdef TIOCGWINSZ
156 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
157 ws->ws_row && ws->ws_col)
158 return;
159 #endif
160 ws->ws_row = 25;
161 ws->ws_col = 80;
162 }
163
164 static void update_print_entries(struct winsize *ws)
165 {
166 print_entries = ws->ws_row;
167
168 if (print_entries > 9)
169 print_entries -= 9;
170 }
171
172 static void sig_winch_handler(int sig __used)
173 {
174 get_term_dimensions(&winsize);
175 update_print_entries(&winsize);
176 }
177
178 static int parse_source(struct sym_entry *syme)
179 {
180 struct symbol *sym;
181 struct sym_entry_source *source;
182 struct map *map;
183 FILE *file;
184 char command[PATH_MAX*2];
185 const char *path;
186 u64 len;
187
188 if (!syme)
189 return -1;
190
191 sym = sym_entry__symbol(syme);
192 map = syme->map;
193
194 /*
195 * We can't annotate with just /proc/kallsyms
196 */
197 if (map->dso->origin == DSO__ORIG_KERNEL)
198 return -1;
199
200 if (syme->src == NULL) {
201 syme->src = zalloc(sizeof(*source));
202 if (syme->src == NULL)
203 return -1;
204 pthread_mutex_init(&syme->src->lock, NULL);
205 }
206
207 source = syme->src;
208
209 if (source->lines) {
210 pthread_mutex_lock(&source->lock);
211 goto out_assign;
212 }
213 path = map->dso->long_name;
214
215 len = sym->end - sym->start;
216
217 sprintf(command,
218 "objdump --start-address=%#0*" PRIx64 " --stop-address=%#0*" PRIx64 " -dS %s",
219 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
220 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
221
222 file = popen(command, "r");
223 if (!file)
224 return -1;
225
226 pthread_mutex_lock(&source->lock);
227 source->lines_tail = &source->lines;
228 while (!feof(file)) {
229 struct source_line *src;
230 size_t dummy = 0;
231 char *c, *sep;
232
233 src = malloc(sizeof(struct source_line));
234 assert(src != NULL);
235 memset(src, 0, sizeof(struct source_line));
236
237 if (getline(&src->line, &dummy, file) < 0)
238 break;
239 if (!src->line)
240 break;
241
242 c = strchr(src->line, '\n');
243 if (c)
244 *c = 0;
245
246 src->next = NULL;
247 *source->lines_tail = src;
248 source->lines_tail = &src->next;
249
250 src->eip = strtoull(src->line, &sep, 16);
251 if (*sep == ':')
252 src->eip = map__objdump_2ip(map, src->eip);
253 else /* this line has no ip info (e.g. source line) */
254 src->eip = 0;
255 }
256 pclose(file);
257 out_assign:
258 sym_filter_entry = syme;
259 pthread_mutex_unlock(&source->lock);
260 return 0;
261 }
262
263 static void __zero_source_counters(struct sym_entry *syme)
264 {
265 int i;
266 struct source_line *line;
267
268 line = syme->src->lines;
269 while (line) {
270 for (i = 0; i < nr_counters; i++)
271 line->count[i] = 0;
272 line = line->next;
273 }
274 }
275
276 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
277 {
278 struct source_line *line;
279
280 if (syme != sym_filter_entry)
281 return;
282
283 if (pthread_mutex_trylock(&syme->src->lock))
284 return;
285
286 if (syme->src == NULL || syme->src->source == NULL)
287 goto out_unlock;
288
289 for (line = syme->src->lines; line; line = line->next) {
290 /* skip lines without IP info */
291 if (line->eip == 0)
292 continue;
293 if (line->eip == ip) {
294 line->count[counter]++;
295 break;
296 }
297 if (line->eip > ip)
298 break;
299 }
300 out_unlock:
301 pthread_mutex_unlock(&syme->src->lock);
302 }
303
304 #define PATTERN_LEN (BITS_PER_LONG / 4 + 2)
305
306 static void lookup_sym_source(struct sym_entry *syme)
307 {
308 struct symbol *symbol = sym_entry__symbol(syme);
309 struct source_line *line;
310 char pattern[PATTERN_LEN + 1];
311
312 sprintf(pattern, "%0*" PRIx64 " <", BITS_PER_LONG / 4,
313 map__rip_2objdump(syme->map, symbol->start));
314
315 pthread_mutex_lock(&syme->src->lock);
316 for (line = syme->src->lines; line; line = line->next) {
317 if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
318 syme->src->source = line;
319 break;
320 }
321 }
322 pthread_mutex_unlock(&syme->src->lock);
323 }
324
325 static void show_lines(struct source_line *queue, int count, int total)
326 {
327 int i;
328 struct source_line *line;
329
330 line = queue;
331 for (i = 0; i < count; i++) {
332 float pcnt = 100.0*(float)line->count[sym_counter]/(float)total;
333
334 printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line);
335 line = line->next;
336 }
337 }
338
339 #define TRACE_COUNT 3
340
341 static void show_details(struct sym_entry *syme)
342 {
343 struct symbol *symbol;
344 struct source_line *line;
345 struct source_line *line_queue = NULL;
346 int displayed = 0;
347 int line_queue_count = 0, total = 0, more = 0;
348
349 if (!syme)
350 return;
351
352 if (!syme->src->source)
353 lookup_sym_source(syme);
354
355 if (!syme->src->source)
356 return;
357
358 symbol = sym_entry__symbol(syme);
359 printf("Showing %s for %s\n", event_name(sym_evsel), symbol->name);
360 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
361
362 pthread_mutex_lock(&syme->src->lock);
363 line = syme->src->source;
364 while (line) {
365 total += line->count[sym_counter];
366 line = line->next;
367 }
368
369 line = syme->src->source;
370 while (line) {
371 float pcnt = 0.0;
372
373 if (!line_queue_count)
374 line_queue = line;
375 line_queue_count++;
376
377 if (line->count[sym_counter])
378 pcnt = 100.0 * line->count[sym_counter] / (float)total;
379 if (pcnt >= (float)sym_pcnt_filter) {
380 if (displayed <= print_entries)
381 show_lines(line_queue, line_queue_count, total);
382 else more++;
383 displayed += line_queue_count;
384 line_queue_count = 0;
385 line_queue = NULL;
386 } else if (line_queue_count > TRACE_COUNT) {
387 line_queue = line_queue->next;
388 line_queue_count--;
389 }
390
391 line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
392 line = line->next;
393 }
394 pthread_mutex_unlock(&syme->src->lock);
395 if (more)
396 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
397 }
398
399 /*
400 * Symbols will be added here in event__process_sample and will get out
401 * after decayed.
402 */
403 static LIST_HEAD(active_symbols);
404 static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
405
406 /*
407 * Ordering weight: count-1 * count-2 * ... / count-n
408 */
409 static double sym_weight(const struct sym_entry *sym)
410 {
411 double weight = sym->snap_count;
412 int counter;
413
414 if (!display_weighted)
415 return weight;
416
417 for (counter = 1; counter < nr_counters-1; counter++)
418 weight *= sym->count[counter];
419
420 weight /= (sym->count[counter] + 1);
421
422 return weight;
423 }
424
425 static long samples;
426 static long kernel_samples, us_samples;
427 static long exact_samples;
428 static long guest_us_samples, guest_kernel_samples;
429 static const char CONSOLE_CLEAR[] = "\e[H\e[2J";
430
431 static void __list_insert_active_sym(struct sym_entry *syme)
432 {
433 list_add(&syme->node, &active_symbols);
434 }
435
436 static void list_remove_active_sym(struct sym_entry *syme)
437 {
438 pthread_mutex_lock(&active_symbols_lock);
439 list_del_init(&syme->node);
440 pthread_mutex_unlock(&active_symbols_lock);
441 }
442
443 static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
444 {
445 struct rb_node **p = &tree->rb_node;
446 struct rb_node *parent = NULL;
447 struct sym_entry *iter;
448
449 while (*p != NULL) {
450 parent = *p;
451 iter = rb_entry(parent, struct sym_entry, rb_node);
452
453 if (se->weight > iter->weight)
454 p = &(*p)->rb_left;
455 else
456 p = &(*p)->rb_right;
457 }
458
459 rb_link_node(&se->rb_node, parent, p);
460 rb_insert_color(&se->rb_node, tree);
461 }
462
463 static void print_sym_table(void)
464 {
465 int printed = 0, j;
466 struct perf_evsel *counter;
467 int snap = !display_weighted ? sym_counter : 0;
468 float samples_per_sec = samples/delay_secs;
469 float ksamples_per_sec = kernel_samples/delay_secs;
470 float us_samples_per_sec = (us_samples)/delay_secs;
471 float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
472 float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
473 float esamples_percent = (100.0*exact_samples)/samples;
474 float sum_ksamples = 0.0;
475 struct sym_entry *syme, *n;
476 struct rb_root tmp = RB_ROOT;
477 struct rb_node *nd;
478 int sym_width = 0, dso_width = 0, dso_short_width = 0;
479 const int win_width = winsize.ws_col - 1;
480
481 samples = us_samples = kernel_samples = exact_samples = 0;
482 guest_kernel_samples = guest_us_samples = 0;
483
484 /* Sort the active symbols */
485 pthread_mutex_lock(&active_symbols_lock);
486 syme = list_entry(active_symbols.next, struct sym_entry, node);
487 pthread_mutex_unlock(&active_symbols_lock);
488
489 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
490 syme->snap_count = syme->count[snap];
491 if (syme->snap_count != 0) {
492
493 if ((hide_user_symbols &&
494 syme->origin == PERF_RECORD_MISC_USER) ||
495 (hide_kernel_symbols &&
496 syme->origin == PERF_RECORD_MISC_KERNEL)) {
497 list_remove_active_sym(syme);
498 continue;
499 }
500 syme->weight = sym_weight(syme);
501 rb_insert_active_sym(&tmp, syme);
502 sum_ksamples += syme->snap_count;
503
504 for (j = 0; j < nr_counters; j++)
505 syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
506 } else
507 list_remove_active_sym(syme);
508 }
509
510 puts(CONSOLE_CLEAR);
511
512 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
513 if (!perf_guest) {
514 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
515 " exact: %4.1f%% [",
516 samples_per_sec,
517 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
518 samples_per_sec)),
519 esamples_percent);
520 } else {
521 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
522 " guest kernel:%4.1f%% guest us:%4.1f%%"
523 " exact: %4.1f%% [",
524 samples_per_sec,
525 100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
526 samples_per_sec)),
527 100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
528 samples_per_sec)),
529 100.0 - (100.0 * ((samples_per_sec -
530 guest_kernel_samples_per_sec) /
531 samples_per_sec)),
532 100.0 - (100.0 * ((samples_per_sec -
533 guest_us_samples_per_sec) /
534 samples_per_sec)),
535 esamples_percent);
536 }
537
538 if (nr_counters == 1 || !display_weighted) {
539 struct perf_evsel *first;
540 first = list_entry(evsel_list.next, struct perf_evsel, node);
541 printf("%" PRIu64, (uint64_t)first->attr.sample_period);
542 if (freq)
543 printf("Hz ");
544 else
545 printf(" ");
546 }
547
548 if (!display_weighted)
549 printf("%s", event_name(sym_evsel));
550 else list_for_each_entry(counter, &evsel_list, node) {
551 if (counter->idx)
552 printf("/");
553
554 printf("%s", event_name(counter));
555 }
556
557 printf( "], ");
558
559 if (target_pid != -1)
560 printf(" (target_pid: %d", target_pid);
561 else if (target_tid != -1)
562 printf(" (target_tid: %d", target_tid);
563 else
564 printf(" (all");
565
566 if (cpu_list)
567 printf(", CPU%s: %s)\n", cpus->nr > 1 ? "s" : "", cpu_list);
568 else {
569 if (target_tid != -1)
570 printf(")\n");
571 else
572 printf(", %d CPU%s)\n", cpus->nr, cpus->nr > 1 ? "s" : "");
573 }
574
575 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
576
577 if (sym_filter_entry) {
578 show_details(sym_filter_entry);
579 return;
580 }
581
582 /*
583 * Find the longest symbol name that will be displayed
584 */
585 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
586 syme = rb_entry(nd, struct sym_entry, rb_node);
587 if (++printed > print_entries ||
588 (int)syme->snap_count < count_filter)
589 continue;
590
591 if (syme->map->dso->long_name_len > dso_width)
592 dso_width = syme->map->dso->long_name_len;
593
594 if (syme->map->dso->short_name_len > dso_short_width)
595 dso_short_width = syme->map->dso->short_name_len;
596
597 if (syme->name_len > sym_width)
598 sym_width = syme->name_len;
599 }
600
601 printed = 0;
602
603 if (sym_width + dso_width > winsize.ws_col - 29) {
604 dso_width = dso_short_width;
605 if (sym_width + dso_width > winsize.ws_col - 29)
606 sym_width = winsize.ws_col - dso_width - 29;
607 }
608 putchar('\n');
609 if (nr_counters == 1)
610 printf(" samples pcnt");
611 else
612 printf(" weight samples pcnt");
613
614 if (verbose)
615 printf(" RIP ");
616 printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
617 printf(" %s _______ _____",
618 nr_counters == 1 ? " " : "______");
619 if (verbose)
620 printf(" ________________");
621 printf(" %-*.*s", sym_width, sym_width, graph_line);
622 printf(" %-*.*s", dso_width, dso_width, graph_line);
623 puts("\n");
624
625 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
626 struct symbol *sym;
627 double pcnt;
628
629 syme = rb_entry(nd, struct sym_entry, rb_node);
630 sym = sym_entry__symbol(syme);
631 if (++printed > print_entries || (int)syme->snap_count < count_filter)
632 continue;
633
634 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
635 sum_ksamples));
636
637 if (nr_counters == 1 || !display_weighted)
638 printf("%20.2f ", syme->weight);
639 else
640 printf("%9.1f %10ld ", syme->weight, syme->snap_count);
641
642 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
643 if (verbose)
644 printf(" %016" PRIx64, sym->start);
645 printf(" %-*.*s", sym_width, sym_width, sym->name);
646 printf(" %-*.*s\n", dso_width, dso_width,
647 dso_width >= syme->map->dso->long_name_len ?
648 syme->map->dso->long_name :
649 syme->map->dso->short_name);
650 }
651 }
652
653 static void prompt_integer(int *target, const char *msg)
654 {
655 char *buf = malloc(0), *p;
656 size_t dummy = 0;
657 int tmp;
658
659 fprintf(stdout, "\n%s: ", msg);
660 if (getline(&buf, &dummy, stdin) < 0)
661 return;
662
663 p = strchr(buf, '\n');
664 if (p)
665 *p = 0;
666
667 p = buf;
668 while(*p) {
669 if (!isdigit(*p))
670 goto out_free;
671 p++;
672 }
673 tmp = strtoul(buf, NULL, 10);
674 *target = tmp;
675 out_free:
676 free(buf);
677 }
678
679 static void prompt_percent(int *target, const char *msg)
680 {
681 int tmp = 0;
682
683 prompt_integer(&tmp, msg);
684 if (tmp >= 0 && tmp <= 100)
685 *target = tmp;
686 }
687
688 static void prompt_symbol(struct sym_entry **target, const char *msg)
689 {
690 char *buf = malloc(0), *p;
691 struct sym_entry *syme = *target, *n, *found = NULL;
692 size_t dummy = 0;
693
694 /* zero counters of active symbol */
695 if (syme) {
696 pthread_mutex_lock(&syme->src->lock);
697 __zero_source_counters(syme);
698 *target = NULL;
699 pthread_mutex_unlock(&syme->src->lock);
700 }
701
702 fprintf(stdout, "\n%s: ", msg);
703 if (getline(&buf, &dummy, stdin) < 0)
704 goto out_free;
705
706 p = strchr(buf, '\n');
707 if (p)
708 *p = 0;
709
710 pthread_mutex_lock(&active_symbols_lock);
711 syme = list_entry(active_symbols.next, struct sym_entry, node);
712 pthread_mutex_unlock(&active_symbols_lock);
713
714 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
715 struct symbol *sym = sym_entry__symbol(syme);
716
717 if (!strcmp(buf, sym->name)) {
718 found = syme;
719 break;
720 }
721 }
722
723 if (!found) {
724 fprintf(stderr, "Sorry, %s is not active.\n", buf);
725 sleep(1);
726 return;
727 } else
728 parse_source(found);
729
730 out_free:
731 free(buf);
732 }
733
734 static void print_mapped_keys(void)
735 {
736 char *name = NULL;
737
738 if (sym_filter_entry) {
739 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
740 name = sym->name;
741 }
742
743 fprintf(stdout, "\nMapped keys:\n");
744 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs);
745 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries);
746
747 if (nr_counters > 1)
748 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_evsel));
749
750 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
751
752 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
753 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
754 fprintf(stdout, "\t[S] stop annotation.\n");
755
756 if (nr_counters > 1)
757 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
758
759 fprintf(stdout,
760 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
761 hide_kernel_symbols ? "yes" : "no");
762 fprintf(stdout,
763 "\t[U] hide user symbols. \t(%s)\n",
764 hide_user_symbols ? "yes" : "no");
765 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
766 fprintf(stdout, "\t[qQ] quit.\n");
767 }
768
769 static int key_mapped(int c)
770 {
771 switch (c) {
772 case 'd':
773 case 'e':
774 case 'f':
775 case 'z':
776 case 'q':
777 case 'Q':
778 case 'K':
779 case 'U':
780 case 'F':
781 case 's':
782 case 'S':
783 return 1;
784 case 'E':
785 case 'w':
786 return nr_counters > 1 ? 1 : 0;
787 default:
788 break;
789 }
790
791 return 0;
792 }
793
794 static void handle_keypress(struct perf_session *session, int c)
795 {
796 if (!key_mapped(c)) {
797 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
798 struct termios tc, save;
799
800 print_mapped_keys();
801 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
802 fflush(stdout);
803
804 tcgetattr(0, &save);
805 tc = save;
806 tc.c_lflag &= ~(ICANON | ECHO);
807 tc.c_cc[VMIN] = 0;
808 tc.c_cc[VTIME] = 0;
809 tcsetattr(0, TCSANOW, &tc);
810
811 poll(&stdin_poll, 1, -1);
812 c = getc(stdin);
813
814 tcsetattr(0, TCSAFLUSH, &save);
815 if (!key_mapped(c))
816 return;
817 }
818
819 switch (c) {
820 case 'd':
821 prompt_integer(&delay_secs, "Enter display delay");
822 if (delay_secs < 1)
823 delay_secs = 1;
824 break;
825 case 'e':
826 prompt_integer(&print_entries, "Enter display entries (lines)");
827 if (print_entries == 0) {
828 sig_winch_handler(SIGWINCH);
829 signal(SIGWINCH, sig_winch_handler);
830 } else
831 signal(SIGWINCH, SIG_DFL);
832 break;
833 case 'E':
834 if (nr_counters > 1) {
835 fprintf(stderr, "\nAvailable events:");
836
837 list_for_each_entry(sym_evsel, &evsel_list, node)
838 fprintf(stderr, "\n\t%d %s", sym_evsel->idx, event_name(sym_evsel));
839
840 prompt_integer(&sym_counter, "Enter details event counter");
841
842 if (sym_counter >= nr_counters) {
843 sym_evsel = list_entry(evsel_list.next, struct perf_evsel, node);
844 sym_counter = 0;
845 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(sym_evsel));
846 sleep(1);
847 break;
848 }
849 list_for_each_entry(sym_evsel, &evsel_list, node)
850 if (sym_evsel->idx == sym_counter)
851 break;
852 } else sym_counter = 0;
853 break;
854 case 'f':
855 prompt_integer(&count_filter, "Enter display event count filter");
856 break;
857 case 'F':
858 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
859 break;
860 case 'K':
861 hide_kernel_symbols = !hide_kernel_symbols;
862 break;
863 case 'q':
864 case 'Q':
865 printf("exiting.\n");
866 if (dump_symtab)
867 perf_session__fprintf_dsos(session, stderr);
868 exit(0);
869 case 's':
870 prompt_symbol(&sym_filter_entry, "Enter details symbol");
871 break;
872 case 'S':
873 if (!sym_filter_entry)
874 break;
875 else {
876 struct sym_entry *syme = sym_filter_entry;
877
878 pthread_mutex_lock(&syme->src->lock);
879 sym_filter_entry = NULL;
880 __zero_source_counters(syme);
881 pthread_mutex_unlock(&syme->src->lock);
882 }
883 break;
884 case 'U':
885 hide_user_symbols = !hide_user_symbols;
886 break;
887 case 'w':
888 display_weighted = ~display_weighted;
889 break;
890 case 'z':
891 zero = !zero;
892 break;
893 default:
894 break;
895 }
896 }
897
898 static void *display_thread(void *arg __used)
899 {
900 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
901 struct termios tc, save;
902 int delay_msecs, c;
903 struct perf_session *session = (struct perf_session *) arg;
904
905 tcgetattr(0, &save);
906 tc = save;
907 tc.c_lflag &= ~(ICANON | ECHO);
908 tc.c_cc[VMIN] = 0;
909 tc.c_cc[VTIME] = 0;
910
911 repeat:
912 delay_msecs = delay_secs * 1000;
913 tcsetattr(0, TCSANOW, &tc);
914 /* trash return*/
915 getc(stdin);
916
917 do {
918 print_sym_table();
919 } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
920
921 c = getc(stdin);
922 tcsetattr(0, TCSAFLUSH, &save);
923
924 handle_keypress(session, c);
925 goto repeat;
926
927 return NULL;
928 }
929
930 /* Tag samples to be skipped. */
931 static const char *skip_symbols[] = {
932 "default_idle",
933 "cpu_idle",
934 "enter_idle",
935 "exit_idle",
936 "mwait_idle",
937 "mwait_idle_with_hints",
938 "poll_idle",
939 "ppc64_runlatch_off",
940 "pseries_dedicated_idle_sleep",
941 NULL
942 };
943
944 static int symbol_filter(struct map *map, struct symbol *sym)
945 {
946 struct sym_entry *syme;
947 const char *name = sym->name;
948 int i;
949
950 /*
951 * ppc64 uses function descriptors and appends a '.' to the
952 * start of every instruction address. Remove it.
953 */
954 if (name[0] == '.')
955 name++;
956
957 if (!strcmp(name, "_text") ||
958 !strcmp(name, "_etext") ||
959 !strcmp(name, "_sinittext") ||
960 !strncmp("init_module", name, 11) ||
961 !strncmp("cleanup_module", name, 14) ||
962 strstr(name, "_text_start") ||
963 strstr(name, "_text_end"))
964 return 1;
965
966 syme = symbol__priv(sym);
967 syme->map = map;
968 syme->src = NULL;
969
970 if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
971 /* schedule initial sym_filter_entry setup */
972 sym_filter_entry_sched = syme;
973 sym_filter = NULL;
974 }
975
976 for (i = 0; skip_symbols[i]; i++) {
977 if (!strcmp(skip_symbols[i], name)) {
978 syme->skip = 1;
979 break;
980 }
981 }
982
983 if (!syme->skip)
984 syme->name_len = strlen(sym->name);
985
986 return 0;
987 }
988
989 static void event__process_sample(const event_t *self,
990 struct sample_data *sample,
991 struct perf_session *session,
992 struct perf_evsel *evsel)
993 {
994 u64 ip = self->ip.ip;
995 struct sym_entry *syme;
996 struct addr_location al;
997 struct machine *machine;
998 u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
999
1000 ++samples;
1001
1002 switch (origin) {
1003 case PERF_RECORD_MISC_USER:
1004 ++us_samples;
1005 if (hide_user_symbols)
1006 return;
1007 machine = perf_session__find_host_machine(session);
1008 break;
1009 case PERF_RECORD_MISC_KERNEL:
1010 ++kernel_samples;
1011 if (hide_kernel_symbols)
1012 return;
1013 machine = perf_session__find_host_machine(session);
1014 break;
1015 case PERF_RECORD_MISC_GUEST_KERNEL:
1016 ++guest_kernel_samples;
1017 machine = perf_session__find_machine(session, self->ip.pid);
1018 break;
1019 case PERF_RECORD_MISC_GUEST_USER:
1020 ++guest_us_samples;
1021 /*
1022 * TODO: we don't process guest user from host side
1023 * except simple counting.
1024 */
1025 return;
1026 default:
1027 return;
1028 }
1029
1030 if (!machine && perf_guest) {
1031 pr_err("Can't find guest [%d]'s kernel information\n",
1032 self->ip.pid);
1033 return;
1034 }
1035
1036 if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
1037 exact_samples++;
1038
1039 if (event__preprocess_sample(self, session, &al, sample,
1040 symbol_filter) < 0 ||
1041 al.filtered)
1042 return;
1043
1044 if (al.sym == NULL) {
1045 /*
1046 * As we do lazy loading of symtabs we only will know if the
1047 * specified vmlinux file is invalid when we actually have a
1048 * hit in kernel space and then try to load it. So if we get
1049 * here and there are _no_ symbols in the DSO backing the
1050 * kernel map, bail out.
1051 *
1052 * We may never get here, for instance, if we use -K/
1053 * --hide-kernel-symbols, even if the user specifies an
1054 * invalid --vmlinux ;-)
1055 */
1056 if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
1057 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
1058 pr_err("The %s file can't be used\n",
1059 symbol_conf.vmlinux_name);
1060 exit(1);
1061 }
1062
1063 return;
1064 }
1065
1066 /* let's see, whether we need to install initial sym_filter_entry */
1067 if (sym_filter_entry_sched) {
1068 sym_filter_entry = sym_filter_entry_sched;
1069 sym_filter_entry_sched = NULL;
1070 if (parse_source(sym_filter_entry) < 0) {
1071 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
1072
1073 pr_err("Can't annotate %s", sym->name);
1074 if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
1075 pr_err(": No vmlinux file was found in the path:\n");
1076 machine__fprintf_vmlinux_path(machine, stderr);
1077 } else
1078 pr_err(".\n");
1079 exit(1);
1080 }
1081 }
1082
1083 syme = symbol__priv(al.sym);
1084 if (!syme->skip) {
1085 syme->count[evsel->idx]++;
1086 syme->origin = origin;
1087 record_precise_ip(syme, evsel->idx, ip);
1088 pthread_mutex_lock(&active_symbols_lock);
1089 if (list_empty(&syme->node) || !syme->node.next)
1090 __list_insert_active_sym(syme);
1091 pthread_mutex_unlock(&active_symbols_lock);
1092 }
1093 }
1094
1095 struct mmap_data {
1096 void *base;
1097 int mask;
1098 unsigned int prev;
1099 };
1100
1101 static int perf_evsel__alloc_mmap_per_thread(struct perf_evsel *evsel,
1102 int ncpus, int nthreads)
1103 {
1104 evsel->priv = xyarray__new(ncpus, nthreads, sizeof(struct mmap_data));
1105 return evsel->priv != NULL ? 0 : -ENOMEM;
1106 }
1107
1108 static void perf_evsel__free_mmap(struct perf_evsel *evsel)
1109 {
1110 xyarray__delete(evsel->priv);
1111 evsel->priv = NULL;
1112 }
1113
1114 static unsigned int mmap_read_head(struct mmap_data *md)
1115 {
1116 struct perf_event_mmap_page *pc = md->base;
1117 int head;
1118
1119 head = pc->data_head;
1120 rmb();
1121
1122 return head;
1123 }
1124
1125 static void perf_session__mmap_read_counter(struct perf_session *self,
1126 struct perf_evsel *evsel,
1127 int cpu, int thread_idx)
1128 {
1129 struct xyarray *mmap_array = evsel->priv;
1130 struct mmap_data *md = xyarray__entry(mmap_array, cpu, thread_idx);
1131 unsigned int head = mmap_read_head(md);
1132 unsigned int old = md->prev;
1133 unsigned char *data = md->base + page_size;
1134 struct sample_data sample;
1135 int diff;
1136
1137 /*
1138 * If we're further behind than half the buffer, there's a chance
1139 * the writer will bite our tail and mess up the samples under us.
1140 *
1141 * If we somehow ended up ahead of the head, we got messed up.
1142 *
1143 * In either case, truncate and restart at head.
1144 */
1145 diff = head - old;
1146 if (diff > md->mask / 2 || diff < 0) {
1147 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
1148
1149 /*
1150 * head points to a known good entry, start there.
1151 */
1152 old = head;
1153 }
1154
1155 for (; old != head;) {
1156 event_t *event = (event_t *)&data[old & md->mask];
1157
1158 event_t event_copy;
1159
1160 size_t size = event->header.size;
1161
1162 /*
1163 * Event straddles the mmap boundary -- header should always
1164 * be inside due to u64 alignment of output.
1165 */
1166 if ((old & md->mask) + size != ((old + size) & md->mask)) {
1167 unsigned int offset = old;
1168 unsigned int len = min(sizeof(*event), size), cpy;
1169 void *dst = &event_copy;
1170
1171 do {
1172 cpy = min(md->mask + 1 - (offset & md->mask), len);
1173 memcpy(dst, &data[offset & md->mask], cpy);
1174 offset += cpy;
1175 dst += cpy;
1176 len -= cpy;
1177 } while (len);
1178
1179 event = &event_copy;
1180 }
1181
1182 event__parse_sample(event, self, &sample);
1183 if (event->header.type == PERF_RECORD_SAMPLE)
1184 event__process_sample(event, &sample, self, evsel);
1185 else
1186 event__process(event, &sample, self);
1187 old += size;
1188 }
1189
1190 md->prev = old;
1191 }
1192
1193 static struct pollfd *event_array;
1194
1195 static void perf_session__mmap_read(struct perf_session *self)
1196 {
1197 struct perf_evsel *counter;
1198 int i, thread_index;
1199
1200 for (i = 0; i < cpus->nr; i++) {
1201 list_for_each_entry(counter, &evsel_list, node) {
1202 for (thread_index = 0;
1203 thread_index < threads->nr;
1204 thread_index++) {
1205 perf_session__mmap_read_counter(self,
1206 counter, i, thread_index);
1207 }
1208 }
1209 }
1210 }
1211
1212 int nr_poll;
1213 int group_fd;
1214
1215 static void start_counter(int i, struct perf_evsel *evsel)
1216 {
1217 struct xyarray *mmap_array = evsel->priv;
1218 struct mmap_data *mm;
1219 struct perf_event_attr *attr;
1220 int cpu = -1;
1221 int thread_index;
1222
1223 if (target_tid == -1)
1224 cpu = cpus->map[i];
1225
1226 attr = &evsel->attr;
1227
1228 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
1229
1230 if (freq) {
1231 attr->sample_type |= PERF_SAMPLE_PERIOD;
1232 attr->freq = 1;
1233 attr->sample_freq = freq;
1234 }
1235
1236 attr->inherit = (cpu < 0) && inherit;
1237 attr->mmap = 1;
1238
1239 for (thread_index = 0; thread_index < threads->nr; thread_index++) {
1240 try_again:
1241 FD(evsel, i, thread_index) = sys_perf_event_open(attr,
1242 threads->map[thread_index], cpu, group_fd, 0);
1243
1244 if (FD(evsel, i, thread_index) < 0) {
1245 int err = errno;
1246
1247 if (err == EPERM || err == EACCES)
1248 die("Permission error - are you root?\n"
1249 "\t Consider tweaking"
1250 " /proc/sys/kernel/perf_event_paranoid.\n");
1251 /*
1252 * If it's cycles then fall back to hrtimer
1253 * based cpu-clock-tick sw counter, which
1254 * is always available even if no PMU support:
1255 */
1256 if (attr->type == PERF_TYPE_HARDWARE
1257 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
1258
1259 if (verbose)
1260 warning(" ... trying to fall back to cpu-clock-ticks\n");
1261
1262 attr->type = PERF_TYPE_SOFTWARE;
1263 attr->config = PERF_COUNT_SW_CPU_CLOCK;
1264 goto try_again;
1265 }
1266 printf("\n");
1267 error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
1268 FD(evsel, i, thread_index), strerror(err));
1269 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
1270 exit(-1);
1271 }
1272 assert(FD(evsel, i, thread_index) >= 0);
1273 fcntl(FD(evsel, i, thread_index), F_SETFL, O_NONBLOCK);
1274
1275 /*
1276 * First counter acts as the group leader:
1277 */
1278 if (group && group_fd == -1)
1279 group_fd = FD(evsel, i, thread_index);
1280
1281 event_array[nr_poll].fd = FD(evsel, i, thread_index);
1282 event_array[nr_poll].events = POLLIN;
1283 nr_poll++;
1284
1285 mm = xyarray__entry(mmap_array, i, thread_index);
1286 mm->prev = 0;
1287 mm->mask = mmap_pages*page_size - 1;
1288 mm->base = mmap(NULL, (mmap_pages+1)*page_size,
1289 PROT_READ, MAP_SHARED, FD(evsel, i, thread_index), 0);
1290 if (mm->base == MAP_FAILED)
1291 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
1292 }
1293 }
1294
1295 static int __cmd_top(void)
1296 {
1297 pthread_t thread;
1298 struct perf_evsel *counter;
1299 int i, ret;
1300 /*
1301 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1302 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1303 */
1304 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false, NULL);
1305 if (session == NULL)
1306 return -ENOMEM;
1307
1308 if (target_tid != -1)
1309 event__synthesize_thread_map(threads, event__process, session);
1310 else
1311 event__synthesize_threads(event__process, session);
1312
1313 for (i = 0; i < cpus->nr; i++) {
1314 group_fd = -1;
1315 list_for_each_entry(counter, &evsel_list, node)
1316 start_counter(i, counter);
1317 }
1318
1319 /* Wait for a minimal set of events before starting the snapshot */
1320 poll(&event_array[0], nr_poll, 100);
1321
1322 perf_session__mmap_read(session);
1323
1324 if (pthread_create(&thread, NULL, display_thread, session)) {
1325 printf("Could not create display thread.\n");
1326 exit(-1);
1327 }
1328
1329 if (realtime_prio) {
1330 struct sched_param param;
1331
1332 param.sched_priority = realtime_prio;
1333 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1334 printf("Could not set realtime priority.\n");
1335 exit(-1);
1336 }
1337 }
1338
1339 while (1) {
1340 int hits = samples;
1341
1342 perf_session__mmap_read(session);
1343
1344 if (hits == samples)
1345 ret = poll(event_array, nr_poll, 100);
1346 }
1347
1348 return 0;
1349 }
1350
1351 static const char * const top_usage[] = {
1352 "perf top [<options>]",
1353 NULL
1354 };
1355
1356 static const struct option options[] = {
1357 OPT_CALLBACK('e', "event", NULL, "event",
1358 "event selector. use 'perf list' to list available events",
1359 parse_events),
1360 OPT_INTEGER('c', "count", &default_interval,
1361 "event period to sample"),
1362 OPT_INTEGER('p', "pid", &target_pid,
1363 "profile events on existing process id"),
1364 OPT_INTEGER('t', "tid", &target_tid,
1365 "profile events on existing thread id"),
1366 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1367 "system-wide collection from all CPUs"),
1368 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1369 "list of cpus to monitor"),
1370 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1371 "file", "vmlinux pathname"),
1372 OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
1373 "hide kernel symbols"),
1374 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1375 OPT_INTEGER('r', "realtime", &realtime_prio,
1376 "collect data with this RT SCHED_FIFO priority"),
1377 OPT_INTEGER('d', "delay", &delay_secs,
1378 "number of seconds to delay between refreshes"),
1379 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1380 "dump the symbol table used for profiling"),
1381 OPT_INTEGER('f', "count-filter", &count_filter,
1382 "only display functions with more events than this"),
1383 OPT_BOOLEAN('g', "group", &group,
1384 "put the counters into a counter group"),
1385 OPT_BOOLEAN('i', "inherit", &inherit,
1386 "child tasks inherit counters"),
1387 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1388 "symbol to annotate"),
1389 OPT_BOOLEAN('z', "zero", &zero,
1390 "zero history across updates"),
1391 OPT_INTEGER('F', "freq", &freq,
1392 "profile at this frequency"),
1393 OPT_INTEGER('E', "entries", &print_entries,
1394 "display this many functions"),
1395 OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
1396 "hide user symbols"),
1397 OPT_INCR('v', "verbose", &verbose,
1398 "be more verbose (show counter open errors, etc)"),
1399 OPT_END()
1400 };
1401
1402 int cmd_top(int argc, const char **argv, const char *prefix __used)
1403 {
1404 struct perf_evsel *pos;
1405 int status = -ENOMEM;
1406
1407 page_size = sysconf(_SC_PAGE_SIZE);
1408
1409 argc = parse_options(argc, argv, options, top_usage, 0);
1410 if (argc)
1411 usage_with_options(top_usage, options);
1412
1413 if (target_pid != -1)
1414 target_tid = target_pid;
1415
1416 threads = thread_map__new(target_pid, target_tid);
1417 if (threads == NULL) {
1418 pr_err("Problems finding threads of monitor\n");
1419 usage_with_options(top_usage, options);
1420 }
1421
1422 event_array = malloc((sizeof(struct pollfd) *
1423 MAX_NR_CPUS * MAX_COUNTERS * threads->nr));
1424 if (!event_array)
1425 return -ENOMEM;
1426
1427 /* CPU and PID are mutually exclusive */
1428 if (target_tid > 0 && cpu_list) {
1429 printf("WARNING: PID switch overriding CPU\n");
1430 sleep(1);
1431 cpu_list = NULL;
1432 }
1433
1434 if (!nr_counters && perf_evsel_list__create_default() < 0) {
1435 pr_err("Not enough memory for event selector list\n");
1436 return -ENOMEM;
1437 }
1438
1439 if (delay_secs < 1)
1440 delay_secs = 1;
1441
1442 /*
1443 * User specified count overrides default frequency.
1444 */
1445 if (default_interval)
1446 freq = 0;
1447 else if (freq) {
1448 default_interval = freq;
1449 } else {
1450 fprintf(stderr, "frequency and count are zero, aborting\n");
1451 exit(EXIT_FAILURE);
1452 }
1453
1454 if (target_tid != -1)
1455 cpus = cpu_map__dummy_new();
1456 else
1457 cpus = cpu_map__new(cpu_list);
1458
1459 if (cpus == NULL)
1460 usage_with_options(top_usage, options);
1461
1462 list_for_each_entry(pos, &evsel_list, node) {
1463 if (perf_evsel__alloc_mmap_per_thread(pos, cpus->nr, threads->nr) < 0 ||
1464 perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
1465 goto out_free_fd;
1466 /*
1467 * Fill in the ones not specifically initialized via -c:
1468 */
1469 if (pos->attr.sample_period)
1470 continue;
1471
1472 pos->attr.sample_period = default_interval;
1473 }
1474
1475 sym_evsel = list_entry(evsel_list.next, struct perf_evsel, node);
1476
1477 symbol_conf.priv_size = (sizeof(struct sym_entry) +
1478 (nr_counters + 1) * sizeof(unsigned long));
1479
1480 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1481 if (symbol__init() < 0)
1482 return -1;
1483
1484 get_term_dimensions(&winsize);
1485 if (print_entries == 0) {
1486 update_print_entries(&winsize);
1487 signal(SIGWINCH, sig_winch_handler);
1488 }
1489
1490 status = __cmd_top();
1491 out_free_fd:
1492 list_for_each_entry(pos, &evsel_list, node)
1493 perf_evsel__free_mmap(pos);
1494 perf_evsel_list__delete();
1495
1496 return status;
1497 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree