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drm/i915: kill ring->get_active_head
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / tools / perf / builtin-top.c
blobb513e40974f46bf45f816d658d78d574762f5b17
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/session.h"
25 #include "util/symbol.h"
26 #include "util/thread.h"
27 #include "util/util.h"
28 #include <linux/rbtree.h>
29 #include "util/parse-options.h"
30 #include "util/parse-events.h"
31 #include "util/cpumap.h"
32
33 #include "util/debug.h"
34
35 #include <assert.h>
36 #include <fcntl.h>
37
38 #include <stdio.h>
39 #include <termios.h>
40 #include <unistd.h>
41
42 #include <errno.h>
43 #include <time.h>
44 #include <sched.h>
45 #include <pthread.h>
46
47 #include <sys/syscall.h>
48 #include <sys/ioctl.h>
49 #include <sys/poll.h>
50 #include <sys/prctl.h>
51 #include <sys/wait.h>
52 #include <sys/uio.h>
53 #include <sys/mman.h>
54
55 #include <linux/unistd.h>
56 #include <linux/types.h>
57
58 static int *fd[MAX_NR_CPUS][MAX_COUNTERS];
59
60 static bool system_wide = false;
61
62 static int default_interval = 0;
63
64 static int count_filter = 5;
65 static int print_entries;
66
67 static int target_pid = -1;
68 static int target_tid = -1;
69 static pid_t *all_tids = NULL;
70 static int thread_num = 0;
71 static bool inherit = false;
72 static int profile_cpu = -1;
73 static int nr_cpus = 0;
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 int display_weighted = -1;
105 static const char *cpu_list;
106
107 /*
108 * Symbols
109 */
110
111 struct sym_entry_source {
112 struct source_line *source;
113 struct source_line *lines;
114 struct source_line **lines_tail;
115 pthread_mutex_t lock;
116 };
117
118 struct sym_entry {
119 struct rb_node rb_node;
120 struct list_head node;
121 unsigned long snap_count;
122 double weight;
123 int skip;
124 u16 name_len;
125 u8 origin;
126 struct map *map;
127 struct sym_entry_source *src;
128 unsigned long count[0];
129 };
130
131 /*
132 * Source functions
133 */
134
135 static inline struct symbol *sym_entry__symbol(struct sym_entry *self)
136 {
137 return ((void *)self) + symbol_conf.priv_size;
138 }
139
140 void get_term_dimensions(struct winsize *ws)
141 {
142 char *s = getenv("LINES");
143
144 if (s != NULL) {
145 ws->ws_row = atoi(s);
146 s = getenv("COLUMNS");
147 if (s != NULL) {
148 ws->ws_col = atoi(s);
149 if (ws->ws_row && ws->ws_col)
150 return;
151 }
152 }
153 #ifdef TIOCGWINSZ
154 if (ioctl(1, TIOCGWINSZ, ws) == 0 &&
155 ws->ws_row && ws->ws_col)
156 return;
157 #endif
158 ws->ws_row = 25;
159 ws->ws_col = 80;
160 }
161
162 static void update_print_entries(struct winsize *ws)
163 {
164 print_entries = ws->ws_row;
165
166 if (print_entries > 9)
167 print_entries -= 9;
168 }
169
170 static void sig_winch_handler(int sig __used)
171 {
172 get_term_dimensions(&winsize);
173 update_print_entries(&winsize);
174 }
175
176 static int parse_source(struct sym_entry *syme)
177 {
178 struct symbol *sym;
179 struct sym_entry_source *source;
180 struct map *map;
181 FILE *file;
182 char command[PATH_MAX*2];
183 const char *path;
184 u64 len;
185
186 if (!syme)
187 return -1;
188
189 sym = sym_entry__symbol(syme);
190 map = syme->map;
191
192 /*
193 * We can't annotate with just /proc/kallsyms
194 */
195 if (map->dso->origin == DSO__ORIG_KERNEL)
196 return -1;
197
198 if (syme->src == NULL) {
199 syme->src = zalloc(sizeof(*source));
200 if (syme->src == NULL)
201 return -1;
202 pthread_mutex_init(&syme->src->lock, NULL);
203 }
204
205 source = syme->src;
206
207 if (source->lines) {
208 pthread_mutex_lock(&source->lock);
209 goto out_assign;
210 }
211 path = map->dso->long_name;
212
213 len = sym->end - sym->start;
214
215 sprintf(command,
216 "objdump --start-address=%#0*Lx --stop-address=%#0*Lx -dS %s",
217 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->start),
218 BITS_PER_LONG / 4, map__rip_2objdump(map, sym->end), path);
219
220 file = popen(command, "r");
221 if (!file)
222 return -1;
223
224 pthread_mutex_lock(&source->lock);
225 source->lines_tail = &source->lines;
226 while (!feof(file)) {
227 struct source_line *src;
228 size_t dummy = 0;
229 char *c, *sep;
230
231 src = malloc(sizeof(struct source_line));
232 assert(src != NULL);
233 memset(src, 0, sizeof(struct source_line));
234
235 if (getline(&src->line, &dummy, file) < 0)
236 break;
237 if (!src->line)
238 break;
239
240 c = strchr(src->line, '\n');
241 if (c)
242 *c = 0;
243
244 src->next = NULL;
245 *source->lines_tail = src;
246 source->lines_tail = &src->next;
247
248 src->eip = strtoull(src->line, &sep, 16);
249 if (*sep == ':')
250 src->eip = map__objdump_2ip(map, src->eip);
251 else /* this line has no ip info (e.g. source line) */
252 src->eip = 0;
253 }
254 pclose(file);
255 out_assign:
256 sym_filter_entry = syme;
257 pthread_mutex_unlock(&source->lock);
258 return 0;
259 }
260
261 static void __zero_source_counters(struct sym_entry *syme)
262 {
263 int i;
264 struct source_line *line;
265
266 line = syme->src->lines;
267 while (line) {
268 for (i = 0; i < nr_counters; i++)
269 line->count[i] = 0;
270 line = line->next;
271 }
272 }
273
274 static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip)
275 {
276 struct source_line *line;
277
278 if (syme != sym_filter_entry)
279 return;
280
281 if (pthread_mutex_trylock(&syme->src->lock))
282 return;
283
284 if (syme->src == NULL || syme->src->source == NULL)
285 goto out_unlock;
286
287 for (line = syme->src->lines; line; line = line->next) {
288 /* skip lines without IP info */
289 if (line->eip == 0)
290 continue;
291 if (line->eip == ip) {
292 line->count[counter]++;
293 break;
294 }
295 if (line->eip > ip)
296 break;
297 }
298 out_unlock:
299 pthread_mutex_unlock(&syme->src->lock);
300 }
301
302 #define PATTERN_LEN (BITS_PER_LONG / 4 + 2)
303
304 static void lookup_sym_source(struct sym_entry *syme)
305 {
306 struct symbol *symbol = sym_entry__symbol(syme);
307 struct source_line *line;
308 char pattern[PATTERN_LEN + 1];
309
310 sprintf(pattern, "%0*Lx <", BITS_PER_LONG / 4,
311 map__rip_2objdump(syme->map, symbol->start));
312
313 pthread_mutex_lock(&syme->src->lock);
314 for (line = syme->src->lines; line; line = line->next) {
315 if (memcmp(line->line, pattern, PATTERN_LEN) == 0) {
316 syme->src->source = line;
317 break;
318 }
319 }
320 pthread_mutex_unlock(&syme->src->lock);
321 }
322
323 static void show_lines(struct source_line *queue, int count, int total)
324 {
325 int i;
326 struct source_line *line;
327
328 line = queue;
329 for (i = 0; i < count; i++) {
330 float pcnt = 100.0*(float)line->count[sym_counter]/(float)total;
331
332 printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line);
333 line = line->next;
334 }
335 }
336
337 #define TRACE_COUNT 3
338
339 static void show_details(struct sym_entry *syme)
340 {
341 struct symbol *symbol;
342 struct source_line *line;
343 struct source_line *line_queue = NULL;
344 int displayed = 0;
345 int line_queue_count = 0, total = 0, more = 0;
346
347 if (!syme)
348 return;
349
350 if (!syme->src->source)
351 lookup_sym_source(syme);
352
353 if (!syme->src->source)
354 return;
355
356 symbol = sym_entry__symbol(syme);
357 printf("Showing %s for %s\n", event_name(sym_counter), symbol->name);
358 printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter);
359
360 pthread_mutex_lock(&syme->src->lock);
361 line = syme->src->source;
362 while (line) {
363 total += line->count[sym_counter];
364 line = line->next;
365 }
366
367 line = syme->src->source;
368 while (line) {
369 float pcnt = 0.0;
370
371 if (!line_queue_count)
372 line_queue = line;
373 line_queue_count++;
374
375 if (line->count[sym_counter])
376 pcnt = 100.0 * line->count[sym_counter] / (float)total;
377 if (pcnt >= (float)sym_pcnt_filter) {
378 if (displayed <= print_entries)
379 show_lines(line_queue, line_queue_count, total);
380 else more++;
381 displayed += line_queue_count;
382 line_queue_count = 0;
383 line_queue = NULL;
384 } else if (line_queue_count > TRACE_COUNT) {
385 line_queue = line_queue->next;
386 line_queue_count--;
387 }
388
389 line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8;
390 line = line->next;
391 }
392 pthread_mutex_unlock(&syme->src->lock);
393 if (more)
394 printf("%d lines not displayed, maybe increase display entries [e]\n", more);
395 }
396
397 /*
398 * Symbols will be added here in event__process_sample and will get out
399 * after decayed.
400 */
401 static LIST_HEAD(active_symbols);
402 static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER;
403
404 /*
405 * Ordering weight: count-1 * count-2 * ... / count-n
406 */
407 static double sym_weight(const struct sym_entry *sym)
408 {
409 double weight = sym->snap_count;
410 int counter;
411
412 if (!display_weighted)
413 return weight;
414
415 for (counter = 1; counter < nr_counters-1; counter++)
416 weight *= sym->count[counter];
417
418 weight /= (sym->count[counter] + 1);
419
420 return weight;
421 }
422
423 static long samples;
424 static long kernel_samples, us_samples;
425 static long exact_samples;
426 static long guest_us_samples, guest_kernel_samples;
427 static const char CONSOLE_CLEAR[] = "\e[H\e[2J";
428
429 static void __list_insert_active_sym(struct sym_entry *syme)
430 {
431 list_add(&syme->node, &active_symbols);
432 }
433
434 static void list_remove_active_sym(struct sym_entry *syme)
435 {
436 pthread_mutex_lock(&active_symbols_lock);
437 list_del_init(&syme->node);
438 pthread_mutex_unlock(&active_symbols_lock);
439 }
440
441 static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se)
442 {
443 struct rb_node **p = &tree->rb_node;
444 struct rb_node *parent = NULL;
445 struct sym_entry *iter;
446
447 while (*p != NULL) {
448 parent = *p;
449 iter = rb_entry(parent, struct sym_entry, rb_node);
450
451 if (se->weight > iter->weight)
452 p = &(*p)->rb_left;
453 else
454 p = &(*p)->rb_right;
455 }
456
457 rb_link_node(&se->rb_node, parent, p);
458 rb_insert_color(&se->rb_node, tree);
459 }
460
461 static void print_sym_table(void)
462 {
463 int printed = 0, j;
464 int counter, snap = !display_weighted ? sym_counter : 0;
465 float samples_per_sec = samples/delay_secs;
466 float ksamples_per_sec = kernel_samples/delay_secs;
467 float us_samples_per_sec = (us_samples)/delay_secs;
468 float guest_kernel_samples_per_sec = (guest_kernel_samples)/delay_secs;
469 float guest_us_samples_per_sec = (guest_us_samples)/delay_secs;
470 float esamples_percent = (100.0*exact_samples)/samples;
471 float sum_ksamples = 0.0;
472 struct sym_entry *syme, *n;
473 struct rb_root tmp = RB_ROOT;
474 struct rb_node *nd;
475 int sym_width = 0, dso_width = 0, dso_short_width = 0;
476 const int win_width = winsize.ws_col - 1;
477
478 samples = us_samples = kernel_samples = exact_samples = 0;
479 guest_kernel_samples = guest_us_samples = 0;
480
481 /* Sort the active symbols */
482 pthread_mutex_lock(&active_symbols_lock);
483 syme = list_entry(active_symbols.next, struct sym_entry, node);
484 pthread_mutex_unlock(&active_symbols_lock);
485
486 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
487 syme->snap_count = syme->count[snap];
488 if (syme->snap_count != 0) {
489
490 if ((hide_user_symbols &&
491 syme->origin == PERF_RECORD_MISC_USER) ||
492 (hide_kernel_symbols &&
493 syme->origin == PERF_RECORD_MISC_KERNEL)) {
494 list_remove_active_sym(syme);
495 continue;
496 }
497 syme->weight = sym_weight(syme);
498 rb_insert_active_sym(&tmp, syme);
499 sum_ksamples += syme->snap_count;
500
501 for (j = 0; j < nr_counters; j++)
502 syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8;
503 } else
504 list_remove_active_sym(syme);
505 }
506
507 puts(CONSOLE_CLEAR);
508
509 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
510 if (!perf_guest) {
511 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%%"
512 " exact: %4.1f%% [",
513 samples_per_sec,
514 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) /
515 samples_per_sec)),
516 esamples_percent);
517 } else {
518 printf(" PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%"
519 " guest kernel:%4.1f%% guest us:%4.1f%%"
520 " exact: %4.1f%% [",
521 samples_per_sec,
522 100.0 - (100.0 * ((samples_per_sec-ksamples_per_sec) /
523 samples_per_sec)),
524 100.0 - (100.0 * ((samples_per_sec-us_samples_per_sec) /
525 samples_per_sec)),
526 100.0 - (100.0 * ((samples_per_sec -
527 guest_kernel_samples_per_sec) /
528 samples_per_sec)),
529 100.0 - (100.0 * ((samples_per_sec -
530 guest_us_samples_per_sec) /
531 samples_per_sec)),
532 esamples_percent);
533 }
534
535 if (nr_counters == 1 || !display_weighted) {
536 printf("%Ld", (u64)attrs[0].sample_period);
537 if (freq)
538 printf("Hz ");
539 else
540 printf(" ");
541 }
542
543 if (!display_weighted)
544 printf("%s", event_name(sym_counter));
545 else for (counter = 0; counter < nr_counters; counter++) {
546 if (counter)
547 printf("/");
548
549 printf("%s", event_name(counter));
550 }
551
552 printf( "], ");
553
554 if (target_pid != -1)
555 printf(" (target_pid: %d", target_pid);
556 else if (target_tid != -1)
557 printf(" (target_tid: %d", target_tid);
558 else
559 printf(" (all");
560
561 if (profile_cpu != -1)
562 printf(", cpu: %d)\n", profile_cpu);
563 else {
564 if (target_tid != -1)
565 printf(")\n");
566 else
567 printf(", %d CPUs)\n", nr_cpus);
568 }
569
570 printf("%-*.*s\n", win_width, win_width, graph_dotted_line);
571
572 if (sym_filter_entry) {
573 show_details(sym_filter_entry);
574 return;
575 }
576
577 /*
578 * Find the longest symbol name that will be displayed
579 */
580 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
581 syme = rb_entry(nd, struct sym_entry, rb_node);
582 if (++printed > print_entries ||
583 (int)syme->snap_count < count_filter)
584 continue;
585
586 if (syme->map->dso->long_name_len > dso_width)
587 dso_width = syme->map->dso->long_name_len;
588
589 if (syme->map->dso->short_name_len > dso_short_width)
590 dso_short_width = syme->map->dso->short_name_len;
591
592 if (syme->name_len > sym_width)
593 sym_width = syme->name_len;
594 }
595
596 printed = 0;
597
598 if (sym_width + dso_width > winsize.ws_col - 29) {
599 dso_width = dso_short_width;
600 if (sym_width + dso_width > winsize.ws_col - 29)
601 sym_width = winsize.ws_col - dso_width - 29;
602 }
603 putchar('\n');
604 if (nr_counters == 1)
605 printf(" samples pcnt");
606 else
607 printf(" weight samples pcnt");
608
609 if (verbose)
610 printf(" RIP ");
611 printf(" %-*.*s DSO\n", sym_width, sym_width, "function");
612 printf(" %s _______ _____",
613 nr_counters == 1 ? " " : "______");
614 if (verbose)
615 printf(" ________________");
616 printf(" %-*.*s", sym_width, sym_width, graph_line);
617 printf(" %-*.*s", dso_width, dso_width, graph_line);
618 puts("\n");
619
620 for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) {
621 struct symbol *sym;
622 double pcnt;
623
624 syme = rb_entry(nd, struct sym_entry, rb_node);
625 sym = sym_entry__symbol(syme);
626 if (++printed > print_entries || (int)syme->snap_count < count_filter)
627 continue;
628
629 pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) /
630 sum_ksamples));
631
632 if (nr_counters == 1 || !display_weighted)
633 printf("%20.2f ", syme->weight);
634 else
635 printf("%9.1f %10ld ", syme->weight, syme->snap_count);
636
637 percent_color_fprintf(stdout, "%4.1f%%", pcnt);
638 if (verbose)
639 printf(" %016llx", sym->start);
640 printf(" %-*.*s", sym_width, sym_width, sym->name);
641 printf(" %-*.*s\n", dso_width, dso_width,
642 dso_width >= syme->map->dso->long_name_len ?
643 syme->map->dso->long_name :
644 syme->map->dso->short_name);
645 }
646 }
647
648 static void prompt_integer(int *target, const char *msg)
649 {
650 char *buf = malloc(0), *p;
651 size_t dummy = 0;
652 int tmp;
653
654 fprintf(stdout, "\n%s: ", msg);
655 if (getline(&buf, &dummy, stdin) < 0)
656 return;
657
658 p = strchr(buf, '\n');
659 if (p)
660 *p = 0;
661
662 p = buf;
663 while(*p) {
664 if (!isdigit(*p))
665 goto out_free;
666 p++;
667 }
668 tmp = strtoul(buf, NULL, 10);
669 *target = tmp;
670 out_free:
671 free(buf);
672 }
673
674 static void prompt_percent(int *target, const char *msg)
675 {
676 int tmp = 0;
677
678 prompt_integer(&tmp, msg);
679 if (tmp >= 0 && tmp <= 100)
680 *target = tmp;
681 }
682
683 static void prompt_symbol(struct sym_entry **target, const char *msg)
684 {
685 char *buf = malloc(0), *p;
686 struct sym_entry *syme = *target, *n, *found = NULL;
687 size_t dummy = 0;
688
689 /* zero counters of active symbol */
690 if (syme) {
691 pthread_mutex_lock(&syme->src->lock);
692 __zero_source_counters(syme);
693 *target = NULL;
694 pthread_mutex_unlock(&syme->src->lock);
695 }
696
697 fprintf(stdout, "\n%s: ", msg);
698 if (getline(&buf, &dummy, stdin) < 0)
699 goto out_free;
700
701 p = strchr(buf, '\n');
702 if (p)
703 *p = 0;
704
705 pthread_mutex_lock(&active_symbols_lock);
706 syme = list_entry(active_symbols.next, struct sym_entry, node);
707 pthread_mutex_unlock(&active_symbols_lock);
708
709 list_for_each_entry_safe_from(syme, n, &active_symbols, node) {
710 struct symbol *sym = sym_entry__symbol(syme);
711
712 if (!strcmp(buf, sym->name)) {
713 found = syme;
714 break;
715 }
716 }
717
718 if (!found) {
719 fprintf(stderr, "Sorry, %s is not active.\n", buf);
720 sleep(1);
721 return;
722 } else
723 parse_source(found);
724
725 out_free:
726 free(buf);
727 }
728
729 static void print_mapped_keys(void)
730 {
731 char *name = NULL;
732
733 if (sym_filter_entry) {
734 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
735 name = sym->name;
736 }
737
738 fprintf(stdout, "\nMapped keys:\n");
739 fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs);
740 fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries);
741
742 if (nr_counters > 1)
743 fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_counter));
744
745 fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter);
746
747 fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter);
748 fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL");
749 fprintf(stdout, "\t[S] stop annotation.\n");
750
751 if (nr_counters > 1)
752 fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0);
753
754 fprintf(stdout,
755 "\t[K] hide kernel_symbols symbols. \t(%s)\n",
756 hide_kernel_symbols ? "yes" : "no");
757 fprintf(stdout,
758 "\t[U] hide user symbols. \t(%s)\n",
759 hide_user_symbols ? "yes" : "no");
760 fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0);
761 fprintf(stdout, "\t[qQ] quit.\n");
762 }
763
764 static int key_mapped(int c)
765 {
766 switch (c) {
767 case 'd':
768 case 'e':
769 case 'f':
770 case 'z':
771 case 'q':
772 case 'Q':
773 case 'K':
774 case 'U':
775 case 'F':
776 case 's':
777 case 'S':
778 return 1;
779 case 'E':
780 case 'w':
781 return nr_counters > 1 ? 1 : 0;
782 default:
783 break;
784 }
785
786 return 0;
787 }
788
789 static void handle_keypress(struct perf_session *session, int c)
790 {
791 if (!key_mapped(c)) {
792 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
793 struct termios tc, save;
794
795 print_mapped_keys();
796 fprintf(stdout, "\nEnter selection, or unmapped key to continue: ");
797 fflush(stdout);
798
799 tcgetattr(0, &save);
800 tc = save;
801 tc.c_lflag &= ~(ICANON | ECHO);
802 tc.c_cc[VMIN] = 0;
803 tc.c_cc[VTIME] = 0;
804 tcsetattr(0, TCSANOW, &tc);
805
806 poll(&stdin_poll, 1, -1);
807 c = getc(stdin);
808
809 tcsetattr(0, TCSAFLUSH, &save);
810 if (!key_mapped(c))
811 return;
812 }
813
814 switch (c) {
815 case 'd':
816 prompt_integer(&delay_secs, "Enter display delay");
817 if (delay_secs < 1)
818 delay_secs = 1;
819 break;
820 case 'e':
821 prompt_integer(&print_entries, "Enter display entries (lines)");
822 if (print_entries == 0) {
823 sig_winch_handler(SIGWINCH);
824 signal(SIGWINCH, sig_winch_handler);
825 } else
826 signal(SIGWINCH, SIG_DFL);
827 break;
828 case 'E':
829 if (nr_counters > 1) {
830 int i;
831
832 fprintf(stderr, "\nAvailable events:");
833 for (i = 0; i < nr_counters; i++)
834 fprintf(stderr, "\n\t%d %s", i, event_name(i));
835
836 prompt_integer(&sym_counter, "Enter details event counter");
837
838 if (sym_counter >= nr_counters) {
839 fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(0));
840 sym_counter = 0;
841 sleep(1);
842 }
843 } else sym_counter = 0;
844 break;
845 case 'f':
846 prompt_integer(&count_filter, "Enter display event count filter");
847 break;
848 case 'F':
849 prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)");
850 break;
851 case 'K':
852 hide_kernel_symbols = !hide_kernel_symbols;
853 break;
854 case 'q':
855 case 'Q':
856 printf("exiting.\n");
857 if (dump_symtab)
858 perf_session__fprintf_dsos(session, stderr);
859 exit(0);
860 case 's':
861 prompt_symbol(&sym_filter_entry, "Enter details symbol");
862 break;
863 case 'S':
864 if (!sym_filter_entry)
865 break;
866 else {
867 struct sym_entry *syme = sym_filter_entry;
868
869 pthread_mutex_lock(&syme->src->lock);
870 sym_filter_entry = NULL;
871 __zero_source_counters(syme);
872 pthread_mutex_unlock(&syme->src->lock);
873 }
874 break;
875 case 'U':
876 hide_user_symbols = !hide_user_symbols;
877 break;
878 case 'w':
879 display_weighted = ~display_weighted;
880 break;
881 case 'z':
882 zero = !zero;
883 break;
884 default:
885 break;
886 }
887 }
888
889 static void *display_thread(void *arg __used)
890 {
891 struct pollfd stdin_poll = { .fd = 0, .events = POLLIN };
892 struct termios tc, save;
893 int delay_msecs, c;
894 struct perf_session *session = (struct perf_session *) arg;
895
896 tcgetattr(0, &save);
897 tc = save;
898 tc.c_lflag &= ~(ICANON | ECHO);
899 tc.c_cc[VMIN] = 0;
900 tc.c_cc[VTIME] = 0;
901
902 repeat:
903 delay_msecs = delay_secs * 1000;
904 tcsetattr(0, TCSANOW, &tc);
905 /* trash return*/
906 getc(stdin);
907
908 do {
909 print_sym_table();
910 } while (!poll(&stdin_poll, 1, delay_msecs) == 1);
911
912 c = getc(stdin);
913 tcsetattr(0, TCSAFLUSH, &save);
914
915 handle_keypress(session, c);
916 goto repeat;
917
918 return NULL;
919 }
920
921 /* Tag samples to be skipped. */
922 static const char *skip_symbols[] = {
923 "default_idle",
924 "cpu_idle",
925 "enter_idle",
926 "exit_idle",
927 "mwait_idle",
928 "mwait_idle_with_hints",
929 "poll_idle",
930 "ppc64_runlatch_off",
931 "pseries_dedicated_idle_sleep",
932 NULL
933 };
934
935 static int symbol_filter(struct map *map, struct symbol *sym)
936 {
937 struct sym_entry *syme;
938 const char *name = sym->name;
939 int i;
940
941 /*
942 * ppc64 uses function descriptors and appends a '.' to the
943 * start of every instruction address. Remove it.
944 */
945 if (name[0] == '.')
946 name++;
947
948 if (!strcmp(name, "_text") ||
949 !strcmp(name, "_etext") ||
950 !strcmp(name, "_sinittext") ||
951 !strncmp("init_module", name, 11) ||
952 !strncmp("cleanup_module", name, 14) ||
953 strstr(name, "_text_start") ||
954 strstr(name, "_text_end"))
955 return 1;
956
957 syme = symbol__priv(sym);
958 syme->map = map;
959 syme->src = NULL;
960
961 if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) {
962 /* schedule initial sym_filter_entry setup */
963 sym_filter_entry_sched = syme;
964 sym_filter = NULL;
965 }
966
967 for (i = 0; skip_symbols[i]; i++) {
968 if (!strcmp(skip_symbols[i], name)) {
969 syme->skip = 1;
970 break;
971 }
972 }
973
974 if (!syme->skip)
975 syme->name_len = strlen(sym->name);
976
977 return 0;
978 }
979
980 static void event__process_sample(const event_t *self,
981 struct perf_session *session, int counter)
982 {
983 u64 ip = self->ip.ip;
984 struct sym_entry *syme;
985 struct addr_location al;
986 struct sample_data data;
987 struct machine *machine;
988 u8 origin = self->header.misc & PERF_RECORD_MISC_CPUMODE_MASK;
989
990 ++samples;
991
992 switch (origin) {
993 case PERF_RECORD_MISC_USER:
994 ++us_samples;
995 if (hide_user_symbols)
996 return;
997 machine = perf_session__find_host_machine(session);
998 break;
999 case PERF_RECORD_MISC_KERNEL:
1000 ++kernel_samples;
1001 if (hide_kernel_symbols)
1002 return;
1003 machine = perf_session__find_host_machine(session);
1004 break;
1005 case PERF_RECORD_MISC_GUEST_KERNEL:
1006 ++guest_kernel_samples;
1007 machine = perf_session__find_machine(session, self->ip.pid);
1008 break;
1009 case PERF_RECORD_MISC_GUEST_USER:
1010 ++guest_us_samples;
1011 /*
1012 * TODO: we don't process guest user from host side
1013 * except simple counting.
1014 */
1015 return;
1016 default:
1017 return;
1018 }
1019
1020 if (!machine && perf_guest) {
1021 pr_err("Can't find guest [%d]'s kernel information\n",
1022 self->ip.pid);
1023 return;
1024 }
1025
1026 if (self->header.misc & PERF_RECORD_MISC_EXACT_IP)
1027 exact_samples++;
1028
1029 if (event__preprocess_sample(self, session, &al, &data,
1030 symbol_filter) < 0 ||
1031 al.filtered)
1032 return;
1033
1034 if (al.sym == NULL) {
1035 /*
1036 * As we do lazy loading of symtabs we only will know if the
1037 * specified vmlinux file is invalid when we actually have a
1038 * hit in kernel space and then try to load it. So if we get
1039 * here and there are _no_ symbols in the DSO backing the
1040 * kernel map, bail out.
1041 *
1042 * We may never get here, for instance, if we use -K/
1043 * --hide-kernel-symbols, even if the user specifies an
1044 * invalid --vmlinux ;-)
1045 */
1046 if (al.map == machine->vmlinux_maps[MAP__FUNCTION] &&
1047 RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION])) {
1048 pr_err("The %s file can't be used\n",
1049 symbol_conf.vmlinux_name);
1050 exit(1);
1051 }
1052
1053 return;
1054 }
1055
1056 /* let's see, whether we need to install initial sym_filter_entry */
1057 if (sym_filter_entry_sched) {
1058 sym_filter_entry = sym_filter_entry_sched;
1059 sym_filter_entry_sched = NULL;
1060 if (parse_source(sym_filter_entry) < 0) {
1061 struct symbol *sym = sym_entry__symbol(sym_filter_entry);
1062
1063 pr_err("Can't annotate %s", sym->name);
1064 if (sym_filter_entry->map->dso->origin == DSO__ORIG_KERNEL) {
1065 pr_err(": No vmlinux file was found in the path:\n");
1066 machine__fprintf_vmlinux_path(machine, stderr);
1067 } else
1068 pr_err(".\n");
1069 exit(1);
1070 }
1071 }
1072
1073 syme = symbol__priv(al.sym);
1074 if (!syme->skip) {
1075 syme->count[counter]++;
1076 syme->origin = origin;
1077 record_precise_ip(syme, counter, ip);
1078 pthread_mutex_lock(&active_symbols_lock);
1079 if (list_empty(&syme->node) || !syme->node.next)
1080 __list_insert_active_sym(syme);
1081 pthread_mutex_unlock(&active_symbols_lock);
1082 }
1083 }
1084
1085 struct mmap_data {
1086 int counter;
1087 void *base;
1088 int mask;
1089 unsigned int prev;
1090 };
1091
1092 static unsigned int mmap_read_head(struct mmap_data *md)
1093 {
1094 struct perf_event_mmap_page *pc = md->base;
1095 int head;
1096
1097 head = pc->data_head;
1098 rmb();
1099
1100 return head;
1101 }
1102
1103 static void perf_session__mmap_read_counter(struct perf_session *self,
1104 struct mmap_data *md)
1105 {
1106 unsigned int head = mmap_read_head(md);
1107 unsigned int old = md->prev;
1108 unsigned char *data = md->base + page_size;
1109 int diff;
1110
1111 /*
1112 * If we're further behind than half the buffer, there's a chance
1113 * the writer will bite our tail and mess up the samples under us.
1114 *
1115 * If we somehow ended up ahead of the head, we got messed up.
1116 *
1117 * In either case, truncate and restart at head.
1118 */
1119 diff = head - old;
1120 if (diff > md->mask / 2 || diff < 0) {
1121 fprintf(stderr, "WARNING: failed to keep up with mmap data.\n");
1122
1123 /*
1124 * head points to a known good entry, start there.
1125 */
1126 old = head;
1127 }
1128
1129 for (; old != head;) {
1130 event_t *event = (event_t *)&data[old & md->mask];
1131
1132 event_t event_copy;
1133
1134 size_t size = event->header.size;
1135
1136 /*
1137 * Event straddles the mmap boundary -- header should always
1138 * be inside due to u64 alignment of output.
1139 */
1140 if ((old & md->mask) + size != ((old + size) & md->mask)) {
1141 unsigned int offset = old;
1142 unsigned int len = min(sizeof(*event), size), cpy;
1143 void *dst = &event_copy;
1144
1145 do {
1146 cpy = min(md->mask + 1 - (offset & md->mask), len);
1147 memcpy(dst, &data[offset & md->mask], cpy);
1148 offset += cpy;
1149 dst += cpy;
1150 len -= cpy;
1151 } while (len);
1152
1153 event = &event_copy;
1154 }
1155
1156 if (event->header.type == PERF_RECORD_SAMPLE)
1157 event__process_sample(event, self, md->counter);
1158 else
1159 event__process(event, self);
1160 old += size;
1161 }
1162
1163 md->prev = old;
1164 }
1165
1166 static struct pollfd *event_array;
1167 static struct mmap_data *mmap_array[MAX_NR_CPUS][MAX_COUNTERS];
1168
1169 static void perf_session__mmap_read(struct perf_session *self)
1170 {
1171 int i, counter, thread_index;
1172
1173 for (i = 0; i < nr_cpus; i++) {
1174 for (counter = 0; counter < nr_counters; counter++)
1175 for (thread_index = 0;
1176 thread_index < thread_num;
1177 thread_index++) {
1178 perf_session__mmap_read_counter(self,
1179 &mmap_array[i][counter][thread_index]);
1180 }
1181 }
1182 }
1183
1184 int nr_poll;
1185 int group_fd;
1186
1187 static void start_counter(int i, int counter)
1188 {
1189 struct perf_event_attr *attr;
1190 int cpu;
1191 int thread_index;
1192
1193 cpu = profile_cpu;
1194 if (target_tid == -1 && profile_cpu == -1)
1195 cpu = cpumap[i];
1196
1197 attr = attrs + counter;
1198
1199 attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID;
1200
1201 if (freq) {
1202 attr->sample_type |= PERF_SAMPLE_PERIOD;
1203 attr->freq = 1;
1204 attr->sample_freq = freq;
1205 }
1206
1207 attr->inherit = (cpu < 0) && inherit;
1208 attr->mmap = 1;
1209
1210 for (thread_index = 0; thread_index < thread_num; thread_index++) {
1211 try_again:
1212 fd[i][counter][thread_index] = sys_perf_event_open(attr,
1213 all_tids[thread_index], cpu, group_fd, 0);
1214
1215 if (fd[i][counter][thread_index] < 0) {
1216 int err = errno;
1217
1218 if (err == EPERM || err == EACCES)
1219 die("No permission - are you root?\n");
1220 /*
1221 * If it's cycles then fall back to hrtimer
1222 * based cpu-clock-tick sw counter, which
1223 * is always available even if no PMU support:
1224 */
1225 if (attr->type == PERF_TYPE_HARDWARE
1226 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
1227
1228 if (verbose)
1229 warning(" ... trying to fall back to cpu-clock-ticks\n");
1230
1231 attr->type = PERF_TYPE_SOFTWARE;
1232 attr->config = PERF_COUNT_SW_CPU_CLOCK;
1233 goto try_again;
1234 }
1235 printf("\n");
1236 error("perfcounter syscall returned with %d (%s)\n",
1237 fd[i][counter][thread_index], strerror(err));
1238 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
1239 exit(-1);
1240 }
1241 assert(fd[i][counter][thread_index] >= 0);
1242 fcntl(fd[i][counter][thread_index], F_SETFL, O_NONBLOCK);
1243
1244 /*
1245 * First counter acts as the group leader:
1246 */
1247 if (group && group_fd == -1)
1248 group_fd = fd[i][counter][thread_index];
1249
1250 event_array[nr_poll].fd = fd[i][counter][thread_index];
1251 event_array[nr_poll].events = POLLIN;
1252 nr_poll++;
1253
1254 mmap_array[i][counter][thread_index].counter = counter;
1255 mmap_array[i][counter][thread_index].prev = 0;
1256 mmap_array[i][counter][thread_index].mask = mmap_pages*page_size - 1;
1257 mmap_array[i][counter][thread_index].base = mmap(NULL, (mmap_pages+1)*page_size,
1258 PROT_READ, MAP_SHARED, fd[i][counter][thread_index], 0);
1259 if (mmap_array[i][counter][thread_index].base == MAP_FAILED)
1260 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
1261 }
1262 }
1263
1264 static int __cmd_top(void)
1265 {
1266 pthread_t thread;
1267 int i, counter;
1268 int ret;
1269 /*
1270 * FIXME: perf_session__new should allow passing a O_MMAP, so that all this
1271 * mmap reading, etc is encapsulated in it. Use O_WRONLY for now.
1272 */
1273 struct perf_session *session = perf_session__new(NULL, O_WRONLY, false, false);
1274 if (session == NULL)
1275 return -ENOMEM;
1276
1277 if (target_tid != -1)
1278 event__synthesize_thread(target_tid, event__process, session);
1279 else
1280 event__synthesize_threads(event__process, session);
1281
1282 for (i = 0; i < nr_cpus; i++) {
1283 group_fd = -1;
1284 for (counter = 0; counter < nr_counters; counter++)
1285 start_counter(i, counter);
1286 }
1287
1288 /* Wait for a minimal set of events before starting the snapshot */
1289 poll(&event_array[0], nr_poll, 100);
1290
1291 perf_session__mmap_read(session);
1292
1293 if (pthread_create(&thread, NULL, display_thread, session)) {
1294 printf("Could not create display thread.\n");
1295 exit(-1);
1296 }
1297
1298 if (realtime_prio) {
1299 struct sched_param param;
1300
1301 param.sched_priority = realtime_prio;
1302 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
1303 printf("Could not set realtime priority.\n");
1304 exit(-1);
1305 }
1306 }
1307
1308 while (1) {
1309 int hits = samples;
1310
1311 perf_session__mmap_read(session);
1312
1313 if (hits == samples)
1314 ret = poll(event_array, nr_poll, 100);
1315 }
1316
1317 return 0;
1318 }
1319
1320 static const char * const top_usage[] = {
1321 "perf top [<options>]",
1322 NULL
1323 };
1324
1325 static const struct option options[] = {
1326 OPT_CALLBACK('e', "event", NULL, "event",
1327 "event selector. use 'perf list' to list available events",
1328 parse_events),
1329 OPT_INTEGER('c', "count", &default_interval,
1330 "event period to sample"),
1331 OPT_INTEGER('p', "pid", &target_pid,
1332 "profile events on existing process id"),
1333 OPT_INTEGER('t', "tid", &target_tid,
1334 "profile events on existing thread id"),
1335 OPT_BOOLEAN('a', "all-cpus", &system_wide,
1336 "system-wide collection from all CPUs"),
1337 OPT_STRING('C', "cpu", &cpu_list, "cpu",
1338 "list of cpus to monitor"),
1339 OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
1340 "file", "vmlinux pathname"),
1341 OPT_BOOLEAN('K', "hide_kernel_symbols", &hide_kernel_symbols,
1342 "hide kernel symbols"),
1343 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
1344 OPT_INTEGER('r', "realtime", &realtime_prio,
1345 "collect data with this RT SCHED_FIFO priority"),
1346 OPT_INTEGER('d', "delay", &delay_secs,
1347 "number of seconds to delay between refreshes"),
1348 OPT_BOOLEAN('D', "dump-symtab", &dump_symtab,
1349 "dump the symbol table used for profiling"),
1350 OPT_INTEGER('f', "count-filter", &count_filter,
1351 "only display functions with more events than this"),
1352 OPT_BOOLEAN('g', "group", &group,
1353 "put the counters into a counter group"),
1354 OPT_BOOLEAN('i', "inherit", &inherit,
1355 "child tasks inherit counters"),
1356 OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name",
1357 "symbol to annotate"),
1358 OPT_BOOLEAN('z', "zero", &zero,
1359 "zero history across updates"),
1360 OPT_INTEGER('F', "freq", &freq,
1361 "profile at this frequency"),
1362 OPT_INTEGER('E', "entries", &print_entries,
1363 "display this many functions"),
1364 OPT_BOOLEAN('U', "hide_user_symbols", &hide_user_symbols,
1365 "hide user symbols"),
1366 OPT_INCR('v', "verbose", &verbose,
1367 "be more verbose (show counter open errors, etc)"),
1368 OPT_END()
1369 };
1370
1371 int cmd_top(int argc, const char **argv, const char *prefix __used)
1372 {
1373 int counter;
1374 int i,j;
1375
1376 page_size = sysconf(_SC_PAGE_SIZE);
1377
1378 argc = parse_options(argc, argv, options, top_usage, 0);
1379 if (argc)
1380 usage_with_options(top_usage, options);
1381
1382 if (target_pid != -1) {
1383 target_tid = target_pid;
1384 thread_num = find_all_tid(target_pid, &all_tids);
1385 if (thread_num <= 0) {
1386 fprintf(stderr, "Can't find all threads of pid %d\n",
1387 target_pid);
1388 usage_with_options(top_usage, options);
1389 }
1390 } else {
1391 all_tids=malloc(sizeof(pid_t));
1392 if (!all_tids)
1393 return -ENOMEM;
1394
1395 all_tids[0] = target_tid;
1396 thread_num = 1;
1397 }
1398
1399 for (i = 0; i < MAX_NR_CPUS; i++) {
1400 for (j = 0; j < MAX_COUNTERS; j++) {
1401 fd[i][j] = malloc(sizeof(int)*thread_num);
1402 mmap_array[i][j] = zalloc(
1403 sizeof(struct mmap_data)*thread_num);
1404 if (!fd[i][j] || !mmap_array[i][j])
1405 return -ENOMEM;
1406 }
1407 }
1408 event_array = malloc(
1409 sizeof(struct pollfd)*MAX_NR_CPUS*MAX_COUNTERS*thread_num);
1410 if (!event_array)
1411 return -ENOMEM;
1412
1413 /* CPU and PID are mutually exclusive */
1414 if (target_tid > 0 && cpu_list) {
1415 printf("WARNING: PID switch overriding CPU\n");
1416 sleep(1);
1417 cpu_list = NULL;
1418 }
1419
1420 if (!nr_counters)
1421 nr_counters = 1;
1422
1423 symbol_conf.priv_size = (sizeof(struct sym_entry) +
1424 (nr_counters + 1) * sizeof(unsigned long));
1425
1426 symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
1427 if (symbol__init() < 0)
1428 return -1;
1429
1430 if (delay_secs < 1)
1431 delay_secs = 1;
1432
1433 /*
1434 * User specified count overrides default frequency.
1435 */
1436 if (default_interval)
1437 freq = 0;
1438 else if (freq) {
1439 default_interval = freq;
1440 } else {
1441 fprintf(stderr, "frequency and count are zero, aborting\n");
1442 exit(EXIT_FAILURE);
1443 }
1444
1445 /*
1446 * Fill in the ones not specifically initialized via -c:
1447 */
1448 for (counter = 0; counter < nr_counters; counter++) {
1449 if (attrs[counter].sample_period)
1450 continue;
1451
1452 attrs[counter].sample_period = default_interval;
1453 }
1454
1455 if (target_tid != -1)
1456 nr_cpus = 1;
1457 else
1458 nr_cpus = read_cpu_map(cpu_list);
1459
1460 if (nr_cpus < 1)
1461 usage_with_options(top_usage, options);
1462
1463 get_term_dimensions(&winsize);
1464 if (print_entries == 0) {
1465 update_print_entries(&winsize);
1466 signal(SIGWINCH, sig_winch_handler);
1467 }
1468
1469 return __cmd_top();
1470 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree