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Commit | Line | Data |
---|---|---|
07800601 | 1 | /* |
bf9e1876 IM |
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) | |
07800601 | 18 | */ |
bf9e1876 | 19 | #include "builtin.h" |
07800601 | 20 | |
1a482f38 | 21 | #include "perf.h" |
bf9e1876 | 22 | |
de04687f | 23 | #include "util/symbol.h" |
8fc0321f | 24 | #include "util/color.h" |
148be2c1 | 25 | #include "util/util.h" |
43cbcd8a | 26 | #include <linux/rbtree.h> |
b456bae0 IM |
27 | #include "util/parse-options.h" |
28 | #include "util/parse-events.h" | |
07800601 | 29 | |
8f28827a FW |
30 | #include "util/debug.h" |
31 | ||
07800601 IM |
32 | #include <assert.h> |
33 | #include <fcntl.h> | |
0e9b20b8 | 34 | |
07800601 | 35 | #include <stdio.h> |
923c42c1 MG |
36 | #include <termios.h> |
37 | #include <unistd.h> | |
0e9b20b8 | 38 | |
07800601 | 39 | #include <errno.h> |
07800601 IM |
40 | #include <time.h> |
41 | #include <sched.h> | |
42 | #include <pthread.h> | |
43 | ||
44 | #include <sys/syscall.h> | |
45 | #include <sys/ioctl.h> | |
46 | #include <sys/poll.h> | |
47 | #include <sys/prctl.h> | |
48 | #include <sys/wait.h> | |
49 | #include <sys/uio.h> | |
50 | #include <sys/mman.h> | |
51 | ||
52 | #include <linux/unistd.h> | |
53 | #include <linux/types.h> | |
54 | ||
a21ca2ca | 55 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
07800601 | 56 | |
a21ca2ca | 57 | static int system_wide = 0; |
07800601 | 58 | |
a21ca2ca | 59 | static int default_interval = 100000; |
07800601 | 60 | |
923c42c1 | 61 | static int count_filter = 5; |
6e53cdf1 | 62 | static int print_entries = 15; |
07800601 | 63 | |
6e53cdf1 | 64 | static int target_pid = -1; |
0fdc7e67 | 65 | static int inherit = 0; |
07800601 IM |
66 | static int profile_cpu = -1; |
67 | static int nr_cpus = 0; | |
07800601 IM |
68 | static unsigned int realtime_prio = 0; |
69 | static int group = 0; | |
70 | static unsigned int page_size; | |
cf1f4574 IM |
71 | static unsigned int mmap_pages = 16; |
72 | static int freq = 0; | |
07800601 | 73 | |
07800601 IM |
74 | static int delay_secs = 2; |
75 | static int zero; | |
76 | static int dump_symtab; | |
77 | ||
923c42c1 MG |
78 | /* |
79 | * Source | |
80 | */ | |
81 | ||
82 | struct source_line { | |
83 | u64 eip; | |
84 | unsigned long count[MAX_COUNTERS]; | |
85 | char *line; | |
86 | struct source_line *next; | |
87 | }; | |
88 | ||
89 | static char *sym_filter = NULL; | |
90 | struct sym_entry *sym_filter_entry = NULL; | |
91 | static int sym_pcnt_filter = 5; | |
92 | static int sym_counter = 0; | |
46ab9764 | 93 | static int display_weighted = -1; |
923c42c1 | 94 | |
07800601 IM |
95 | /* |
96 | * Symbols | |
97 | */ | |
98 | ||
07800601 | 99 | struct sym_entry { |
de04687f ACM |
100 | struct rb_node rb_node; |
101 | struct list_head node; | |
07800601 | 102 | unsigned long count[MAX_COUNTERS]; |
c44613a4 ACM |
103 | unsigned long snap_count; |
104 | double weight; | |
07800601 | 105 | int skip; |
923c42c1 MG |
106 | struct source_line *source; |
107 | struct source_line *lines; | |
108 | struct source_line **lines_tail; | |
109 | pthread_mutex_t source_lock; | |
07800601 IM |
110 | }; |
111 | ||
923c42c1 MG |
112 | /* |
113 | * Source functions | |
114 | */ | |
115 | ||
116 | static void parse_source(struct sym_entry *syme) | |
117 | { | |
118 | struct symbol *sym; | |
119 | struct module *module; | |
120 | struct section *section = NULL; | |
121 | FILE *file; | |
83a0944f IM |
122 | char command[PATH_MAX*2]; |
123 | const char *path = vmlinux_name; | |
923c42c1 MG |
124 | u64 start, end, len; |
125 | ||
126 | if (!syme) | |
127 | return; | |
128 | ||
129 | if (syme->lines) { | |
130 | pthread_mutex_lock(&syme->source_lock); | |
131 | goto out_assign; | |
132 | } | |
133 | ||
134 | sym = (struct symbol *)(syme + 1); | |
135 | module = sym->module; | |
136 | ||
137 | if (module) | |
138 | path = module->path; | |
139 | if (!path) | |
140 | return; | |
141 | ||
142 | start = sym->obj_start; | |
143 | if (!start) | |
144 | start = sym->start; | |
145 | ||
146 | if (module) { | |
147 | section = module->sections->find_section(module->sections, ".text"); | |
148 | if (section) | |
149 | start -= section->vma; | |
150 | } | |
151 | ||
152 | end = start + sym->end - sym->start + 1; | |
153 | len = sym->end - sym->start; | |
154 | ||
155 | sprintf(command, "objdump --start-address=0x%016Lx --stop-address=0x%016Lx -dS %s", start, end, path); | |
156 | ||
157 | file = popen(command, "r"); | |
158 | if (!file) | |
159 | return; | |
160 | ||
161 | pthread_mutex_lock(&syme->source_lock); | |
162 | syme->lines_tail = &syme->lines; | |
163 | while (!feof(file)) { | |
164 | struct source_line *src; | |
165 | size_t dummy = 0; | |
166 | char *c; | |
167 | ||
168 | src = malloc(sizeof(struct source_line)); | |
169 | assert(src != NULL); | |
170 | memset(src, 0, sizeof(struct source_line)); | |
171 | ||
172 | if (getline(&src->line, &dummy, file) < 0) | |
173 | break; | |
174 | if (!src->line) | |
175 | break; | |
176 | ||
177 | c = strchr(src->line, '\n'); | |
178 | if (c) | |
179 | *c = 0; | |
180 | ||
181 | src->next = NULL; | |
182 | *syme->lines_tail = src; | |
183 | syme->lines_tail = &src->next; | |
184 | ||
185 | if (strlen(src->line)>8 && src->line[8] == ':') { | |
186 | src->eip = strtoull(src->line, NULL, 16); | |
187 | if (section) | |
188 | src->eip += section->vma; | |
189 | } | |
190 | if (strlen(src->line)>8 && src->line[16] == ':') { | |
191 | src->eip = strtoull(src->line, NULL, 16); | |
192 | if (section) | |
193 | src->eip += section->vma; | |
194 | } | |
195 | } | |
196 | pclose(file); | |
197 | out_assign: | |
198 | sym_filter_entry = syme; | |
199 | pthread_mutex_unlock(&syme->source_lock); | |
200 | } | |
201 | ||
202 | static void __zero_source_counters(struct sym_entry *syme) | |
203 | { | |
204 | int i; | |
205 | struct source_line *line; | |
206 | ||
207 | line = syme->lines; | |
208 | while (line) { | |
209 | for (i = 0; i < nr_counters; i++) | |
210 | line->count[i] = 0; | |
211 | line = line->next; | |
212 | } | |
213 | } | |
214 | ||
215 | static void record_precise_ip(struct sym_entry *syme, int counter, u64 ip) | |
216 | { | |
217 | struct source_line *line; | |
218 | ||
219 | if (syme != sym_filter_entry) | |
220 | return; | |
221 | ||
222 | if (pthread_mutex_trylock(&syme->source_lock)) | |
223 | return; | |
224 | ||
225 | if (!syme->source) | |
226 | goto out_unlock; | |
227 | ||
228 | for (line = syme->lines; line; line = line->next) { | |
229 | if (line->eip == ip) { | |
230 | line->count[counter]++; | |
231 | break; | |
232 | } | |
233 | if (line->eip > ip) | |
234 | break; | |
235 | } | |
236 | out_unlock: | |
237 | pthread_mutex_unlock(&syme->source_lock); | |
238 | } | |
239 | ||
240 | static void lookup_sym_source(struct sym_entry *syme) | |
241 | { | |
242 | struct symbol *symbol = (struct symbol *)(syme + 1); | |
243 | struct source_line *line; | |
244 | char pattern[PATH_MAX]; | |
245 | char *idx; | |
246 | ||
247 | sprintf(pattern, "<%s>:", symbol->name); | |
248 | ||
249 | if (symbol->module) { | |
250 | idx = strstr(pattern, "\t"); | |
251 | if (idx) | |
252 | *idx = 0; | |
253 | } | |
254 | ||
255 | pthread_mutex_lock(&syme->source_lock); | |
256 | for (line = syme->lines; line; line = line->next) { | |
257 | if (strstr(line->line, pattern)) { | |
258 | syme->source = line; | |
259 | break; | |
260 | } | |
261 | } | |
262 | pthread_mutex_unlock(&syme->source_lock); | |
263 | } | |
264 | ||
265 | static void show_lines(struct source_line *queue, int count, int total) | |
266 | { | |
267 | int i; | |
268 | struct source_line *line; | |
269 | ||
270 | line = queue; | |
271 | for (i = 0; i < count; i++) { | |
272 | float pcnt = 100.0*(float)line->count[sym_counter]/(float)total; | |
273 | ||
274 | printf("%8li %4.1f%%\t%s\n", line->count[sym_counter], pcnt, line->line); | |
275 | line = line->next; | |
276 | } | |
277 | } | |
278 | ||
279 | #define TRACE_COUNT 3 | |
280 | ||
281 | static void show_details(struct sym_entry *syme) | |
282 | { | |
283 | struct symbol *symbol; | |
284 | struct source_line *line; | |
285 | struct source_line *line_queue = NULL; | |
286 | int displayed = 0; | |
287 | int line_queue_count = 0, total = 0, more = 0; | |
288 | ||
289 | if (!syme) | |
290 | return; | |
291 | ||
292 | if (!syme->source) | |
293 | lookup_sym_source(syme); | |
294 | ||
295 | if (!syme->source) | |
296 | return; | |
297 | ||
298 | symbol = (struct symbol *)(syme + 1); | |
299 | printf("Showing %s for %s\n", event_name(sym_counter), symbol->name); | |
300 | printf(" Events Pcnt (>=%d%%)\n", sym_pcnt_filter); | |
301 | ||
302 | pthread_mutex_lock(&syme->source_lock); | |
303 | line = syme->source; | |
304 | while (line) { | |
305 | total += line->count[sym_counter]; | |
306 | line = line->next; | |
307 | } | |
308 | ||
309 | line = syme->source; | |
310 | while (line) { | |
311 | float pcnt = 0.0; | |
312 | ||
313 | if (!line_queue_count) | |
314 | line_queue = line; | |
315 | line_queue_count++; | |
316 | ||
317 | if (line->count[sym_counter]) | |
318 | pcnt = 100.0 * line->count[sym_counter] / (float)total; | |
319 | if (pcnt >= (float)sym_pcnt_filter) { | |
320 | if (displayed <= print_entries) | |
321 | show_lines(line_queue, line_queue_count, total); | |
322 | else more++; | |
323 | displayed += line_queue_count; | |
324 | line_queue_count = 0; | |
325 | line_queue = NULL; | |
326 | } else if (line_queue_count > TRACE_COUNT) { | |
327 | line_queue = line_queue->next; | |
328 | line_queue_count--; | |
329 | } | |
330 | ||
331 | line->count[sym_counter] = zero ? 0 : line->count[sym_counter] * 7 / 8; | |
332 | line = line->next; | |
333 | } | |
334 | pthread_mutex_unlock(&syme->source_lock); | |
335 | if (more) | |
336 | printf("%d lines not displayed, maybe increase display entries [e]\n", more); | |
337 | } | |
07800601 | 338 | |
de04687f ACM |
339 | /* |
340 | * Symbols will be added here in record_ip and will get out | |
341 | * after decayed. | |
342 | */ | |
343 | static LIST_HEAD(active_symbols); | |
c44613a4 | 344 | static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER; |
07800601 | 345 | |
07800601 IM |
346 | /* |
347 | * Ordering weight: count-1 * count-2 * ... / count-n | |
348 | */ | |
349 | static double sym_weight(const struct sym_entry *sym) | |
350 | { | |
c44613a4 | 351 | double weight = sym->snap_count; |
07800601 IM |
352 | int counter; |
353 | ||
46ab9764 MG |
354 | if (!display_weighted) |
355 | return weight; | |
356 | ||
07800601 IM |
357 | for (counter = 1; counter < nr_counters-1; counter++) |
358 | weight *= sym->count[counter]; | |
359 | ||
360 | weight /= (sym->count[counter] + 1); | |
361 | ||
362 | return weight; | |
363 | } | |
364 | ||
2debbc83 IM |
365 | static long samples; |
366 | static long userspace_samples; | |
07800601 IM |
367 | static const char CONSOLE_CLEAR[] = "\e[H\e[2J"; |
368 | ||
c44613a4 | 369 | static void __list_insert_active_sym(struct sym_entry *syme) |
de04687f ACM |
370 | { |
371 | list_add(&syme->node, &active_symbols); | |
372 | } | |
373 | ||
c44613a4 ACM |
374 | static void list_remove_active_sym(struct sym_entry *syme) |
375 | { | |
376 | pthread_mutex_lock(&active_symbols_lock); | |
377 | list_del_init(&syme->node); | |
378 | pthread_mutex_unlock(&active_symbols_lock); | |
379 | } | |
380 | ||
de04687f ACM |
381 | static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se) |
382 | { | |
383 | struct rb_node **p = &tree->rb_node; | |
384 | struct rb_node *parent = NULL; | |
385 | struct sym_entry *iter; | |
386 | ||
387 | while (*p != NULL) { | |
388 | parent = *p; | |
389 | iter = rb_entry(parent, struct sym_entry, rb_node); | |
390 | ||
c44613a4 | 391 | if (se->weight > iter->weight) |
de04687f ACM |
392 | p = &(*p)->rb_left; |
393 | else | |
394 | p = &(*p)->rb_right; | |
395 | } | |
396 | ||
397 | rb_link_node(&se->rb_node, parent, p); | |
398 | rb_insert_color(&se->rb_node, tree); | |
399 | } | |
07800601 IM |
400 | |
401 | static void print_sym_table(void) | |
402 | { | |
233f0b95 | 403 | int printed = 0, j; |
46ab9764 | 404 | int counter, snap = !display_weighted ? sym_counter : 0; |
2debbc83 IM |
405 | float samples_per_sec = samples/delay_secs; |
406 | float ksamples_per_sec = (samples-userspace_samples)/delay_secs; | |
407 | float sum_ksamples = 0.0; | |
de04687f ACM |
408 | struct sym_entry *syme, *n; |
409 | struct rb_root tmp = RB_ROOT; | |
410 | struct rb_node *nd; | |
07800601 | 411 | |
2debbc83 | 412 | samples = userspace_samples = 0; |
07800601 | 413 | |
de04687f | 414 | /* Sort the active symbols */ |
c44613a4 ACM |
415 | pthread_mutex_lock(&active_symbols_lock); |
416 | syme = list_entry(active_symbols.next, struct sym_entry, node); | |
417 | pthread_mutex_unlock(&active_symbols_lock); | |
418 | ||
419 | list_for_each_entry_safe_from(syme, n, &active_symbols, node) { | |
46ab9764 | 420 | syme->snap_count = syme->count[snap]; |
c44613a4 ACM |
421 | if (syme->snap_count != 0) { |
422 | syme->weight = sym_weight(syme); | |
de04687f | 423 | rb_insert_active_sym(&tmp, syme); |
2debbc83 | 424 | sum_ksamples += syme->snap_count; |
d94b9430 MG |
425 | |
426 | for (j = 0; j < nr_counters; j++) | |
de04687f ACM |
427 | syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8; |
428 | } else | |
c44613a4 | 429 | list_remove_active_sym(syme); |
d94b9430 MG |
430 | } |
431 | ||
0f5486b5 | 432 | puts(CONSOLE_CLEAR); |
07800601 IM |
433 | |
434 | printf( | |
435 | "------------------------------------------------------------------------------\n"); | |
f2521b6e | 436 | printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [", |
2debbc83 IM |
437 | samples_per_sec, |
438 | 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec))); | |
07800601 | 439 | |
46ab9764 | 440 | if (nr_counters == 1 || !display_weighted) { |
9cffa8d5 | 441 | printf("%Ld", (u64)attrs[0].sample_period); |
cf1f4574 IM |
442 | if (freq) |
443 | printf("Hz "); | |
444 | else | |
445 | printf(" "); | |
446 | } | |
07800601 | 447 | |
46ab9764 MG |
448 | if (!display_weighted) |
449 | printf("%s", event_name(sym_counter)); | |
450 | else for (counter = 0; counter < nr_counters; counter++) { | |
07800601 IM |
451 | if (counter) |
452 | printf("/"); | |
453 | ||
454 | printf("%s", event_name(counter)); | |
455 | } | |
456 | ||
457 | printf( "], "); | |
458 | ||
b456bae0 IM |
459 | if (target_pid != -1) |
460 | printf(" (target_pid: %d", target_pid); | |
07800601 IM |
461 | else |
462 | printf(" (all"); | |
463 | ||
464 | if (profile_cpu != -1) | |
465 | printf(", cpu: %d)\n", profile_cpu); | |
466 | else { | |
b456bae0 | 467 | if (target_pid != -1) |
07800601 IM |
468 | printf(")\n"); |
469 | else | |
470 | printf(", %d CPUs)\n", nr_cpus); | |
471 | } | |
472 | ||
473 | printf("------------------------------------------------------------------------------\n\n"); | |
474 | ||
923c42c1 MG |
475 | if (sym_filter_entry) { |
476 | show_details(sym_filter_entry); | |
477 | return; | |
478 | } | |
479 | ||
07800601 | 480 | if (nr_counters == 1) |
2debbc83 | 481 | printf(" samples pcnt"); |
07800601 | 482 | else |
7ced156b | 483 | printf(" weight samples pcnt"); |
07800601 | 484 | |
7ced156b ACM |
485 | if (verbose) |
486 | printf(" RIP "); | |
487 | printf(" kernel function\n"); | |
488 | printf(" %s _______ _____", | |
489 | nr_counters == 1 ? " " : "______"); | |
490 | if (verbose) | |
491 | printf(" ________________"); | |
492 | printf(" _______________\n\n"); | |
07800601 | 493 | |
de04687f | 494 | for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) { |
83a0944f | 495 | struct symbol *sym; |
8fc0321f | 496 | double pcnt; |
d94b9430 | 497 | |
83a0944f IM |
498 | syme = rb_entry(nd, struct sym_entry, rb_node); |
499 | sym = (struct symbol *)(syme + 1); | |
500 | ||
923c42c1 | 501 | if (++printed > print_entries || (int)syme->snap_count < count_filter) |
c44613a4 | 502 | continue; |
d94b9430 | 503 | |
2debbc83 IM |
504 | pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) / |
505 | sum_ksamples)); | |
d94b9430 | 506 | |
46ab9764 | 507 | if (nr_counters == 1 || !display_weighted) |
2debbc83 | 508 | printf("%20.2f - ", syme->weight); |
d94b9430 | 509 | else |
2debbc83 | 510 | printf("%9.1f %10ld - ", syme->weight, syme->snap_count); |
8fc0321f | 511 | |
1e11fd82 | 512 | percent_color_fprintf(stdout, "%4.1f%%", pcnt); |
7ced156b ACM |
513 | if (verbose) |
514 | printf(" - %016llx", sym->start); | |
515 | printf(" : %s", sym->name); | |
42976487 MG |
516 | if (sym->module) |
517 | printf("\t[%s]", sym->module->name); | |
518 | printf("\n"); | |
07800601 | 519 | } |
07800601 IM |
520 | } |
521 | ||
923c42c1 MG |
522 | static void prompt_integer(int *target, const char *msg) |
523 | { | |
524 | char *buf = malloc(0), *p; | |
525 | size_t dummy = 0; | |
526 | int tmp; | |
527 | ||
528 | fprintf(stdout, "\n%s: ", msg); | |
529 | if (getline(&buf, &dummy, stdin) < 0) | |
530 | return; | |
531 | ||
532 | p = strchr(buf, '\n'); | |
533 | if (p) | |
534 | *p = 0; | |
535 | ||
536 | p = buf; | |
537 | while(*p) { | |
538 | if (!isdigit(*p)) | |
539 | goto out_free; | |
540 | p++; | |
541 | } | |
542 | tmp = strtoul(buf, NULL, 10); | |
543 | *target = tmp; | |
544 | out_free: | |
545 | free(buf); | |
546 | } | |
547 | ||
548 | static void prompt_percent(int *target, const char *msg) | |
549 | { | |
550 | int tmp = 0; | |
551 | ||
552 | prompt_integer(&tmp, msg); | |
553 | if (tmp >= 0 && tmp <= 100) | |
554 | *target = tmp; | |
555 | } | |
556 | ||
557 | static void prompt_symbol(struct sym_entry **target, const char *msg) | |
558 | { | |
559 | char *buf = malloc(0), *p; | |
560 | struct sym_entry *syme = *target, *n, *found = NULL; | |
561 | size_t dummy = 0; | |
562 | ||
563 | /* zero counters of active symbol */ | |
564 | if (syme) { | |
565 | pthread_mutex_lock(&syme->source_lock); | |
566 | __zero_source_counters(syme); | |
567 | *target = NULL; | |
568 | pthread_mutex_unlock(&syme->source_lock); | |
569 | } | |
570 | ||
571 | fprintf(stdout, "\n%s: ", msg); | |
572 | if (getline(&buf, &dummy, stdin) < 0) | |
573 | goto out_free; | |
574 | ||
575 | p = strchr(buf, '\n'); | |
576 | if (p) | |
577 | *p = 0; | |
578 | ||
579 | pthread_mutex_lock(&active_symbols_lock); | |
580 | syme = list_entry(active_symbols.next, struct sym_entry, node); | |
581 | pthread_mutex_unlock(&active_symbols_lock); | |
582 | ||
583 | list_for_each_entry_safe_from(syme, n, &active_symbols, node) { | |
584 | struct symbol *sym = (struct symbol *)(syme + 1); | |
585 | ||
586 | if (!strcmp(buf, sym->name)) { | |
587 | found = syme; | |
588 | break; | |
589 | } | |
590 | } | |
591 | ||
592 | if (!found) { | |
593 | fprintf(stderr, "Sorry, %s is not active.\n", sym_filter); | |
594 | sleep(1); | |
595 | return; | |
596 | } else | |
597 | parse_source(found); | |
598 | ||
599 | out_free: | |
600 | free(buf); | |
601 | } | |
602 | ||
091bd2e9 | 603 | static void print_mapped_keys(void) |
923c42c1 | 604 | { |
091bd2e9 MG |
605 | char *name = NULL; |
606 | ||
607 | if (sym_filter_entry) { | |
608 | struct symbol *sym = (struct symbol *)(sym_filter_entry+1); | |
609 | name = sym->name; | |
610 | } | |
611 | ||
612 | fprintf(stdout, "\nMapped keys:\n"); | |
613 | fprintf(stdout, "\t[d] display refresh delay. \t(%d)\n", delay_secs); | |
614 | fprintf(stdout, "\t[e] display entries (lines). \t(%d)\n", print_entries); | |
615 | ||
616 | if (nr_counters > 1) | |
617 | fprintf(stdout, "\t[E] active event counter. \t(%s)\n", event_name(sym_counter)); | |
618 | ||
619 | fprintf(stdout, "\t[f] profile display filter (count). \t(%d)\n", count_filter); | |
620 | ||
83a0944f | 621 | if (vmlinux_name) { |
091bd2e9 MG |
622 | fprintf(stdout, "\t[F] annotate display filter (percent). \t(%d%%)\n", sym_pcnt_filter); |
623 | fprintf(stdout, "\t[s] annotate symbol. \t(%s)\n", name?: "NULL"); | |
624 | fprintf(stdout, "\t[S] stop annotation.\n"); | |
625 | } | |
626 | ||
627 | if (nr_counters > 1) | |
628 | fprintf(stdout, "\t[w] toggle display weighted/count[E]r. \t(%d)\n", display_weighted ? 1 : 0); | |
629 | ||
46ab9764 | 630 | fprintf(stdout, "\t[z] toggle sample zeroing. \t(%d)\n", zero ? 1 : 0); |
091bd2e9 MG |
631 | fprintf(stdout, "\t[qQ] quit.\n"); |
632 | } | |
633 | ||
634 | static int key_mapped(int c) | |
635 | { | |
636 | switch (c) { | |
637 | case 'd': | |
638 | case 'e': | |
639 | case 'f': | |
640 | case 'z': | |
641 | case 'q': | |
642 | case 'Q': | |
643 | return 1; | |
644 | case 'E': | |
645 | case 'w': | |
646 | return nr_counters > 1 ? 1 : 0; | |
647 | case 'F': | |
648 | case 's': | |
649 | case 'S': | |
83a0944f IM |
650 | return vmlinux_name ? 1 : 0; |
651 | default: | |
652 | break; | |
091bd2e9 MG |
653 | } |
654 | ||
655 | return 0; | |
923c42c1 MG |
656 | } |
657 | ||
658 | static void handle_keypress(int c) | |
659 | { | |
091bd2e9 MG |
660 | if (!key_mapped(c)) { |
661 | struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; | |
662 | struct termios tc, save; | |
663 | ||
664 | print_mapped_keys(); | |
665 | fprintf(stdout, "\nEnter selection, or unmapped key to continue: "); | |
666 | fflush(stdout); | |
667 | ||
668 | tcgetattr(0, &save); | |
669 | tc = save; | |
670 | tc.c_lflag &= ~(ICANON | ECHO); | |
671 | tc.c_cc[VMIN] = 0; | |
672 | tc.c_cc[VTIME] = 0; | |
673 | tcsetattr(0, TCSANOW, &tc); | |
674 | ||
675 | poll(&stdin_poll, 1, -1); | |
676 | c = getc(stdin); | |
677 | ||
678 | tcsetattr(0, TCSAFLUSH, &save); | |
679 | if (!key_mapped(c)) | |
680 | return; | |
681 | } | |
682 | ||
923c42c1 MG |
683 | switch (c) { |
684 | case 'd': | |
685 | prompt_integer(&delay_secs, "Enter display delay"); | |
686 | break; | |
687 | case 'e': | |
688 | prompt_integer(&print_entries, "Enter display entries (lines)"); | |
689 | break; | |
690 | case 'E': | |
691 | if (nr_counters > 1) { | |
692 | int i; | |
693 | ||
694 | fprintf(stderr, "\nAvailable events:"); | |
695 | for (i = 0; i < nr_counters; i++) | |
696 | fprintf(stderr, "\n\t%d %s", i, event_name(i)); | |
697 | ||
698 | prompt_integer(&sym_counter, "Enter details event counter"); | |
699 | ||
700 | if (sym_counter >= nr_counters) { | |
701 | fprintf(stderr, "Sorry, no such event, using %s.\n", event_name(0)); | |
702 | sym_counter = 0; | |
703 | sleep(1); | |
704 | } | |
705 | } else sym_counter = 0; | |
706 | break; | |
707 | case 'f': | |
708 | prompt_integer(&count_filter, "Enter display event count filter"); | |
709 | break; | |
710 | case 'F': | |
711 | prompt_percent(&sym_pcnt_filter, "Enter details display event filter (percent)"); | |
712 | break; | |
713 | case 'q': | |
714 | case 'Q': | |
715 | printf("exiting.\n"); | |
716 | exit(0); | |
717 | case 's': | |
718 | prompt_symbol(&sym_filter_entry, "Enter details symbol"); | |
719 | break; | |
720 | case 'S': | |
721 | if (!sym_filter_entry) | |
722 | break; | |
723 | else { | |
724 | struct sym_entry *syme = sym_filter_entry; | |
725 | ||
726 | pthread_mutex_lock(&syme->source_lock); | |
727 | sym_filter_entry = NULL; | |
728 | __zero_source_counters(syme); | |
729 | pthread_mutex_unlock(&syme->source_lock); | |
730 | } | |
731 | break; | |
46ab9764 MG |
732 | case 'w': |
733 | display_weighted = ~display_weighted; | |
734 | break; | |
923c42c1 MG |
735 | case 'z': |
736 | zero = ~zero; | |
737 | break; | |
83a0944f IM |
738 | default: |
739 | break; | |
923c42c1 MG |
740 | } |
741 | } | |
742 | ||
f37a291c | 743 | static void *display_thread(void *arg __used) |
07800601 | 744 | { |
0f5486b5 | 745 | struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; |
923c42c1 MG |
746 | struct termios tc, save; |
747 | int delay_msecs, c; | |
748 | ||
749 | tcgetattr(0, &save); | |
750 | tc = save; | |
751 | tc.c_lflag &= ~(ICANON | ECHO); | |
752 | tc.c_cc[VMIN] = 0; | |
753 | tc.c_cc[VTIME] = 0; | |
091bd2e9 | 754 | |
923c42c1 MG |
755 | repeat: |
756 | delay_msecs = delay_secs * 1000; | |
757 | tcsetattr(0, TCSANOW, &tc); | |
758 | /* trash return*/ | |
759 | getc(stdin); | |
07800601 | 760 | |
0f5486b5 | 761 | do { |
07800601 | 762 | print_sym_table(); |
0f5486b5 FW |
763 | } while (!poll(&stdin_poll, 1, delay_msecs) == 1); |
764 | ||
923c42c1 MG |
765 | c = getc(stdin); |
766 | tcsetattr(0, TCSAFLUSH, &save); | |
767 | ||
768 | handle_keypress(c); | |
769 | goto repeat; | |
07800601 IM |
770 | |
771 | return NULL; | |
772 | } | |
773 | ||
2ab52083 | 774 | /* Tag samples to be skipped. */ |
f37a291c | 775 | static const char *skip_symbols[] = { |
2ab52083 AB |
776 | "default_idle", |
777 | "cpu_idle", | |
778 | "enter_idle", | |
779 | "exit_idle", | |
780 | "mwait_idle", | |
59b90056 | 781 | "mwait_idle_with_hints", |
3a3393ef AB |
782 | "ppc64_runlatch_off", |
783 | "pseries_dedicated_idle_sleep", | |
2ab52083 AB |
784 | NULL |
785 | }; | |
786 | ||
de04687f | 787 | static int symbol_filter(struct dso *self, struct symbol *sym) |
07800601 | 788 | { |
de04687f ACM |
789 | struct sym_entry *syme; |
790 | const char *name = sym->name; | |
2ab52083 | 791 | int i; |
de04687f | 792 | |
3a3393ef AB |
793 | /* |
794 | * ppc64 uses function descriptors and appends a '.' to the | |
795 | * start of every instruction address. Remove it. | |
796 | */ | |
797 | if (name[0] == '.') | |
798 | name++; | |
799 | ||
de04687f ACM |
800 | if (!strcmp(name, "_text") || |
801 | !strcmp(name, "_etext") || | |
802 | !strcmp(name, "_sinittext") || | |
803 | !strncmp("init_module", name, 11) || | |
804 | !strncmp("cleanup_module", name, 14) || | |
805 | strstr(name, "_text_start") || | |
806 | strstr(name, "_text_end")) | |
07800601 | 807 | return 1; |
07800601 | 808 | |
de04687f | 809 | syme = dso__sym_priv(self, sym); |
923c42c1 MG |
810 | pthread_mutex_init(&syme->source_lock, NULL); |
811 | if (!sym_filter_entry && sym_filter && !strcmp(name, sym_filter)) | |
812 | sym_filter_entry = syme; | |
813 | ||
2ab52083 AB |
814 | for (i = 0; skip_symbols[i]; i++) { |
815 | if (!strcmp(skip_symbols[i], name)) { | |
816 | syme->skip = 1; | |
817 | break; | |
818 | } | |
819 | } | |
07800601 | 820 | |
07800601 IM |
821 | return 0; |
822 | } | |
823 | ||
de04687f | 824 | static int parse_symbols(void) |
07800601 | 825 | { |
83a0944f | 826 | int use_modules = vmlinux_name ? 1 : 0; |
07800601 | 827 | |
de04687f ACM |
828 | kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry)); |
829 | if (kernel_dso == NULL) | |
830 | return -1; | |
07800601 | 831 | |
83a0944f | 832 | if (dso__load_kernel(kernel_dso, vmlinux_name, symbol_filter, verbose, use_modules) <= 0) |
de04687f | 833 | goto out_delete_dso; |
07800601 | 834 | |
de04687f | 835 | if (dump_symtab) |
a3ec8d70 | 836 | dso__fprintf(kernel_dso, stderr); |
07800601 | 837 | |
de04687f | 838 | return 0; |
07800601 | 839 | |
de04687f ACM |
840 | out_delete_dso: |
841 | dso__delete(kernel_dso); | |
842 | kernel_dso = NULL; | |
843 | return -1; | |
07800601 IM |
844 | } |
845 | ||
07800601 IM |
846 | /* |
847 | * Binary search in the histogram table and record the hit: | |
848 | */ | |
9cffa8d5 | 849 | static void record_ip(u64 ip, int counter) |
07800601 | 850 | { |
de04687f | 851 | struct symbol *sym = dso__find_symbol(kernel_dso, ip); |
07800601 | 852 | |
de04687f ACM |
853 | if (sym != NULL) { |
854 | struct sym_entry *syme = dso__sym_priv(kernel_dso, sym); | |
07800601 | 855 | |
de04687f ACM |
856 | if (!syme->skip) { |
857 | syme->count[counter]++; | |
923c42c1 | 858 | record_precise_ip(syme, counter, ip); |
c44613a4 | 859 | pthread_mutex_lock(&active_symbols_lock); |
de04687f | 860 | if (list_empty(&syme->node) || !syme->node.next) |
c44613a4 ACM |
861 | __list_insert_active_sym(syme); |
862 | pthread_mutex_unlock(&active_symbols_lock); | |
de04687f | 863 | return; |
07800601 | 864 | } |
07800601 IM |
865 | } |
866 | ||
2debbc83 | 867 | samples--; |
07800601 IM |
868 | } |
869 | ||
e6e18ec7 | 870 | static void process_event(u64 ip, int counter, int user) |
07800601 | 871 | { |
2debbc83 | 872 | samples++; |
07800601 | 873 | |
e6e18ec7 | 874 | if (user) { |
2debbc83 | 875 | userspace_samples++; |
07800601 IM |
876 | return; |
877 | } | |
878 | ||
879 | record_ip(ip, counter); | |
880 | } | |
881 | ||
07800601 | 882 | struct mmap_data { |
a21ca2ca IM |
883 | int counter; |
884 | void *base; | |
f37a291c | 885 | int mask; |
a21ca2ca | 886 | unsigned int prev; |
07800601 IM |
887 | }; |
888 | ||
889 | static unsigned int mmap_read_head(struct mmap_data *md) | |
890 | { | |
cdd6c482 | 891 | struct perf_event_mmap_page *pc = md->base; |
07800601 IM |
892 | int head; |
893 | ||
894 | head = pc->data_head; | |
895 | rmb(); | |
896 | ||
897 | return head; | |
898 | } | |
899 | ||
900 | struct timeval last_read, this_read; | |
901 | ||
2f01190a | 902 | static void mmap_read_counter(struct mmap_data *md) |
07800601 IM |
903 | { |
904 | unsigned int head = mmap_read_head(md); | |
905 | unsigned int old = md->prev; | |
906 | unsigned char *data = md->base + page_size; | |
907 | int diff; | |
908 | ||
909 | gettimeofday(&this_read, NULL); | |
910 | ||
911 | /* | |
912 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 913 | * the writer will bite our tail and mess up the samples under us. |
07800601 IM |
914 | * |
915 | * If we somehow ended up ahead of the head, we got messed up. | |
916 | * | |
917 | * In either case, truncate and restart at head. | |
918 | */ | |
919 | diff = head - old; | |
920 | if (diff > md->mask / 2 || diff < 0) { | |
921 | struct timeval iv; | |
922 | unsigned long msecs; | |
923 | ||
924 | timersub(&this_read, &last_read, &iv); | |
925 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
926 | ||
927 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
928 | " Last read %lu msecs ago.\n", msecs); | |
929 | ||
930 | /* | |
931 | * head points to a known good entry, start there. | |
932 | */ | |
933 | old = head; | |
934 | } | |
935 | ||
936 | last_read = this_read; | |
937 | ||
938 | for (; old != head;) { | |
07800601 IM |
939 | event_t *event = (event_t *)&data[old & md->mask]; |
940 | ||
941 | event_t event_copy; | |
942 | ||
6f06ccbc | 943 | size_t size = event->header.size; |
07800601 IM |
944 | |
945 | /* | |
946 | * Event straddles the mmap boundary -- header should always | |
947 | * be inside due to u64 alignment of output. | |
948 | */ | |
949 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
950 | unsigned int offset = old; | |
951 | unsigned int len = min(sizeof(*event), size), cpy; | |
952 | void *dst = &event_copy; | |
953 | ||
954 | do { | |
955 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
956 | memcpy(dst, &data[offset & md->mask], cpy); | |
957 | offset += cpy; | |
958 | dst += cpy; | |
959 | len -= cpy; | |
960 | } while (len); | |
961 | ||
962 | event = &event_copy; | |
963 | } | |
964 | ||
965 | old += size; | |
966 | ||
cdd6c482 | 967 | if (event->header.type == PERF_RECORD_SAMPLE) { |
e6e18ec7 | 968 | int user = |
cdd6c482 | 969 | (event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK) == PERF_RECORD_MISC_USER; |
e6e18ec7 | 970 | process_event(event->ip.ip, md->counter, user); |
07800601 IM |
971 | } |
972 | } | |
973 | ||
974 | md->prev = old; | |
975 | } | |
976 | ||
c2990a2a MG |
977 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; |
978 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; | |
979 | ||
2f01190a FW |
980 | static void mmap_read(void) |
981 | { | |
982 | int i, counter; | |
983 | ||
984 | for (i = 0; i < nr_cpus; i++) { | |
985 | for (counter = 0; counter < nr_counters; counter++) | |
986 | mmap_read_counter(&mmap_array[i][counter]); | |
987 | } | |
988 | } | |
989 | ||
716c69fe IM |
990 | int nr_poll; |
991 | int group_fd; | |
992 | ||
993 | static void start_counter(int i, int counter) | |
07800601 | 994 | { |
cdd6c482 | 995 | struct perf_event_attr *attr; |
0fdc7e67 | 996 | int cpu; |
716c69fe IM |
997 | |
998 | cpu = profile_cpu; | |
999 | if (target_pid == -1 && profile_cpu == -1) | |
1000 | cpu = i; | |
1001 | ||
1002 | attr = attrs + counter; | |
1003 | ||
1004 | attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; | |
1005 | attr->freq = freq; | |
0fdc7e67 | 1006 | attr->inherit = (cpu < 0) && inherit; |
716c69fe IM |
1007 | |
1008 | try_again: | |
cdd6c482 | 1009 | fd[i][counter] = sys_perf_event_open(attr, target_pid, cpu, group_fd, 0); |
716c69fe IM |
1010 | |
1011 | if (fd[i][counter] < 0) { | |
1012 | int err = errno; | |
1013 | ||
716c69fe | 1014 | if (err == EPERM) |
3da297a6 | 1015 | die("No permission - are you root?\n"); |
716c69fe IM |
1016 | /* |
1017 | * If it's cycles then fall back to hrtimer | |
1018 | * based cpu-clock-tick sw counter, which | |
1019 | * is always available even if no PMU support: | |
1020 | */ | |
1021 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 1022 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
716c69fe | 1023 | |
3da297a6 IM |
1024 | if (verbose) |
1025 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
1026 | ||
716c69fe | 1027 | attr->type = PERF_TYPE_SOFTWARE; |
f4dbfa8f | 1028 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
716c69fe IM |
1029 | goto try_again; |
1030 | } | |
30c806a0 IM |
1031 | printf("\n"); |
1032 | error("perfcounter syscall returned with %d (%s)\n", | |
1033 | fd[i][counter], strerror(err)); | |
cdd6c482 | 1034 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
716c69fe IM |
1035 | exit(-1); |
1036 | } | |
1037 | assert(fd[i][counter] >= 0); | |
1038 | fcntl(fd[i][counter], F_SETFL, O_NONBLOCK); | |
1039 | ||
1040 | /* | |
1041 | * First counter acts as the group leader: | |
1042 | */ | |
1043 | if (group && group_fd == -1) | |
1044 | group_fd = fd[i][counter]; | |
1045 | ||
1046 | event_array[nr_poll].fd = fd[i][counter]; | |
1047 | event_array[nr_poll].events = POLLIN; | |
1048 | nr_poll++; | |
1049 | ||
1050 | mmap_array[i][counter].counter = counter; | |
1051 | mmap_array[i][counter].prev = 0; | |
1052 | mmap_array[i][counter].mask = mmap_pages*page_size - 1; | |
1053 | mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
1054 | PROT_READ, MAP_SHARED, fd[i][counter], 0); | |
1055 | if (mmap_array[i][counter].base == MAP_FAILED) | |
1056 | die("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
1057 | } | |
1058 | ||
1059 | static int __cmd_top(void) | |
1060 | { | |
1061 | pthread_t thread; | |
1062 | int i, counter; | |
07800601 IM |
1063 | int ret; |
1064 | ||
07800601 IM |
1065 | for (i = 0; i < nr_cpus; i++) { |
1066 | group_fd = -1; | |
716c69fe IM |
1067 | for (counter = 0; counter < nr_counters; counter++) |
1068 | start_counter(i, counter); | |
07800601 IM |
1069 | } |
1070 | ||
2f01190a FW |
1071 | /* Wait for a minimal set of events before starting the snapshot */ |
1072 | poll(event_array, nr_poll, 100); | |
1073 | ||
1074 | mmap_read(); | |
1075 | ||
07800601 IM |
1076 | if (pthread_create(&thread, NULL, display_thread, NULL)) { |
1077 | printf("Could not create display thread.\n"); | |
1078 | exit(-1); | |
1079 | } | |
1080 | ||
1081 | if (realtime_prio) { | |
1082 | struct sched_param param; | |
1083 | ||
1084 | param.sched_priority = realtime_prio; | |
1085 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
1086 | printf("Could not set realtime priority.\n"); | |
1087 | exit(-1); | |
1088 | } | |
1089 | } | |
1090 | ||
1091 | while (1) { | |
2debbc83 | 1092 | int hits = samples; |
07800601 | 1093 | |
2f01190a | 1094 | mmap_read(); |
07800601 | 1095 | |
2debbc83 | 1096 | if (hits == samples) |
07800601 IM |
1097 | ret = poll(event_array, nr_poll, 100); |
1098 | } | |
1099 | ||
1100 | return 0; | |
1101 | } | |
b456bae0 IM |
1102 | |
1103 | static const char * const top_usage[] = { | |
1104 | "perf top [<options>]", | |
1105 | NULL | |
1106 | }; | |
1107 | ||
b456bae0 IM |
1108 | static const struct option options[] = { |
1109 | OPT_CALLBACK('e', "event", NULL, "event", | |
86847b62 TG |
1110 | "event selector. use 'perf list' to list available events", |
1111 | parse_events), | |
b456bae0 IM |
1112 | OPT_INTEGER('c', "count", &default_interval, |
1113 | "event period to sample"), | |
1114 | OPT_INTEGER('p', "pid", &target_pid, | |
1115 | "profile events on existing pid"), | |
1116 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
1117 | "system-wide collection from all CPUs"), | |
1118 | OPT_INTEGER('C', "CPU", &profile_cpu, | |
1119 | "CPU to profile on"), | |
83a0944f | 1120 | OPT_STRING('k', "vmlinux", &vmlinux_name, "file", "vmlinux pathname"), |
b456bae0 IM |
1121 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
1122 | "number of mmap data pages"), | |
1123 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
1124 | "collect data with this RT SCHED_FIFO priority"), | |
db20c003 | 1125 | OPT_INTEGER('d', "delay", &delay_secs, |
b456bae0 IM |
1126 | "number of seconds to delay between refreshes"), |
1127 | OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, | |
1128 | "dump the symbol table used for profiling"), | |
6e53cdf1 | 1129 | OPT_INTEGER('f', "count-filter", &count_filter, |
b456bae0 IM |
1130 | "only display functions with more events than this"), |
1131 | OPT_BOOLEAN('g', "group", &group, | |
1132 | "put the counters into a counter group"), | |
0fdc7e67 MG |
1133 | OPT_BOOLEAN('i', "inherit", &inherit, |
1134 | "child tasks inherit counters"), | |
923c42c1 MG |
1135 | OPT_STRING('s', "sym-annotate", &sym_filter, "symbol name", |
1136 | "symbol to annotate - requires -k option"), | |
1f208ea6 | 1137 | OPT_BOOLEAN('z', "zero", &zero, |
b456bae0 | 1138 | "zero history across updates"), |
6e53cdf1 | 1139 | OPT_INTEGER('F', "freq", &freq, |
b456bae0 | 1140 | "profile at this frequency"), |
6e53cdf1 IM |
1141 | OPT_INTEGER('E', "entries", &print_entries, |
1142 | "display this many functions"), | |
3da297a6 IM |
1143 | OPT_BOOLEAN('v', "verbose", &verbose, |
1144 | "be more verbose (show counter open errors, etc)"), | |
b456bae0 IM |
1145 | OPT_END() |
1146 | }; | |
1147 | ||
f37a291c | 1148 | int cmd_top(int argc, const char **argv, const char *prefix __used) |
b456bae0 IM |
1149 | { |
1150 | int counter; | |
1151 | ||
42976487 MG |
1152 | symbol__init(); |
1153 | ||
b456bae0 IM |
1154 | page_size = sysconf(_SC_PAGE_SIZE); |
1155 | ||
b456bae0 IM |
1156 | argc = parse_options(argc, argv, options, top_usage, 0); |
1157 | if (argc) | |
1158 | usage_with_options(top_usage, options); | |
1159 | ||
1160 | if (freq) { | |
1161 | default_interval = freq; | |
1162 | freq = 1; | |
1163 | } | |
1164 | ||
1165 | /* CPU and PID are mutually exclusive */ | |
1166 | if (target_pid != -1 && profile_cpu != -1) { | |
1167 | printf("WARNING: PID switch overriding CPU\n"); | |
1168 | sleep(1); | |
1169 | profile_cpu = -1; | |
1170 | } | |
1171 | ||
a21ca2ca | 1172 | if (!nr_counters) |
b456bae0 | 1173 | nr_counters = 1; |
b456bae0 | 1174 | |
2f335a02 FW |
1175 | if (delay_secs < 1) |
1176 | delay_secs = 1; | |
1177 | ||
a21ca2ca | 1178 | parse_symbols(); |
923c42c1 | 1179 | parse_source(sym_filter_entry); |
a21ca2ca IM |
1180 | |
1181 | /* | |
1182 | * Fill in the ones not specifically initialized via -c: | |
1183 | */ | |
b456bae0 | 1184 | for (counter = 0; counter < nr_counters; counter++) { |
a21ca2ca | 1185 | if (attrs[counter].sample_period) |
b456bae0 IM |
1186 | continue; |
1187 | ||
a21ca2ca | 1188 | attrs[counter].sample_period = default_interval; |
b456bae0 IM |
1189 | } |
1190 | ||
1191 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
1192 | assert(nr_cpus <= MAX_NR_CPUS); | |
1193 | assert(nr_cpus >= 0); | |
1194 | ||
1195 | if (target_pid != -1 || profile_cpu != -1) | |
1196 | nr_cpus = 1; | |
1197 | ||
b456bae0 IM |
1198 | return __cmd_top(); |
1199 | } |