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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" |
de04687f | 26 | #include "util/rbtree.h" |
b456bae0 IM |
27 | #include "util/parse-options.h" |
28 | #include "util/parse-events.h" | |
07800601 | 29 | |
07800601 IM |
30 | #include <assert.h> |
31 | #include <fcntl.h> | |
0e9b20b8 | 32 | |
07800601 | 33 | #include <stdio.h> |
0e9b20b8 | 34 | |
07800601 | 35 | #include <errno.h> |
07800601 IM |
36 | #include <time.h> |
37 | #include <sched.h> | |
38 | #include <pthread.h> | |
39 | ||
40 | #include <sys/syscall.h> | |
41 | #include <sys/ioctl.h> | |
42 | #include <sys/poll.h> | |
43 | #include <sys/prctl.h> | |
44 | #include <sys/wait.h> | |
45 | #include <sys/uio.h> | |
46 | #include <sys/mman.h> | |
47 | ||
48 | #include <linux/unistd.h> | |
49 | #include <linux/types.h> | |
50 | ||
a21ca2ca | 51 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
07800601 | 52 | |
a21ca2ca | 53 | static int system_wide = 0; |
07800601 | 54 | |
a21ca2ca | 55 | static int default_interval = 100000; |
07800601 | 56 | |
6e53cdf1 IM |
57 | static __u64 count_filter = 5; |
58 | static int print_entries = 15; | |
07800601 | 59 | |
6e53cdf1 | 60 | static int target_pid = -1; |
07800601 IM |
61 | static int profile_cpu = -1; |
62 | static int nr_cpus = 0; | |
07800601 IM |
63 | static unsigned int realtime_prio = 0; |
64 | static int group = 0; | |
65 | static unsigned int page_size; | |
cf1f4574 IM |
66 | static unsigned int mmap_pages = 16; |
67 | static int freq = 0; | |
07800601 | 68 | |
07800601 IM |
69 | static char *sym_filter; |
70 | static unsigned long filter_start; | |
71 | static unsigned long filter_end; | |
72 | ||
73 | static int delay_secs = 2; | |
74 | static int zero; | |
75 | static int dump_symtab; | |
76 | ||
07800601 IM |
77 | /* |
78 | * Symbols | |
79 | */ | |
80 | ||
81 | static uint64_t min_ip; | |
82 | static uint64_t max_ip = -1ll; | |
83 | ||
84 | struct sym_entry { | |
de04687f ACM |
85 | struct rb_node rb_node; |
86 | struct list_head node; | |
07800601 | 87 | unsigned long count[MAX_COUNTERS]; |
c44613a4 ACM |
88 | unsigned long snap_count; |
89 | double weight; | |
07800601 | 90 | int skip; |
07800601 IM |
91 | }; |
92 | ||
07800601 IM |
93 | struct sym_entry *sym_filter_entry; |
94 | ||
a21ca2ca | 95 | struct dso *kernel_dso; |
de04687f ACM |
96 | |
97 | /* | |
98 | * Symbols will be added here in record_ip and will get out | |
99 | * after decayed. | |
100 | */ | |
101 | static LIST_HEAD(active_symbols); | |
c44613a4 | 102 | static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER; |
07800601 | 103 | |
07800601 IM |
104 | /* |
105 | * Ordering weight: count-1 * count-2 * ... / count-n | |
106 | */ | |
107 | static double sym_weight(const struct sym_entry *sym) | |
108 | { | |
c44613a4 | 109 | double weight = sym->snap_count; |
07800601 IM |
110 | int counter; |
111 | ||
07800601 IM |
112 | for (counter = 1; counter < nr_counters-1; counter++) |
113 | weight *= sym->count[counter]; | |
114 | ||
115 | weight /= (sym->count[counter] + 1); | |
116 | ||
117 | return weight; | |
118 | } | |
119 | ||
2debbc83 IM |
120 | static long samples; |
121 | static long userspace_samples; | |
07800601 IM |
122 | static const char CONSOLE_CLEAR[] = "\e[H\e[2J"; |
123 | ||
c44613a4 | 124 | static void __list_insert_active_sym(struct sym_entry *syme) |
de04687f ACM |
125 | { |
126 | list_add(&syme->node, &active_symbols); | |
127 | } | |
128 | ||
c44613a4 ACM |
129 | static void list_remove_active_sym(struct sym_entry *syme) |
130 | { | |
131 | pthread_mutex_lock(&active_symbols_lock); | |
132 | list_del_init(&syme->node); | |
133 | pthread_mutex_unlock(&active_symbols_lock); | |
134 | } | |
135 | ||
de04687f ACM |
136 | static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se) |
137 | { | |
138 | struct rb_node **p = &tree->rb_node; | |
139 | struct rb_node *parent = NULL; | |
140 | struct sym_entry *iter; | |
141 | ||
142 | while (*p != NULL) { | |
143 | parent = *p; | |
144 | iter = rb_entry(parent, struct sym_entry, rb_node); | |
145 | ||
c44613a4 | 146 | if (se->weight > iter->weight) |
de04687f ACM |
147 | p = &(*p)->rb_left; |
148 | else | |
149 | p = &(*p)->rb_right; | |
150 | } | |
151 | ||
152 | rb_link_node(&se->rb_node, parent, p); | |
153 | rb_insert_color(&se->rb_node, tree); | |
154 | } | |
07800601 IM |
155 | |
156 | static void print_sym_table(void) | |
157 | { | |
233f0b95 | 158 | int printed = 0, j; |
07800601 | 159 | int counter; |
2debbc83 IM |
160 | float samples_per_sec = samples/delay_secs; |
161 | float ksamples_per_sec = (samples-userspace_samples)/delay_secs; | |
162 | float sum_ksamples = 0.0; | |
de04687f ACM |
163 | struct sym_entry *syme, *n; |
164 | struct rb_root tmp = RB_ROOT; | |
165 | struct rb_node *nd; | |
07800601 | 166 | |
2debbc83 | 167 | samples = userspace_samples = 0; |
07800601 | 168 | |
de04687f | 169 | /* Sort the active symbols */ |
c44613a4 ACM |
170 | pthread_mutex_lock(&active_symbols_lock); |
171 | syme = list_entry(active_symbols.next, struct sym_entry, node); | |
172 | pthread_mutex_unlock(&active_symbols_lock); | |
173 | ||
174 | list_for_each_entry_safe_from(syme, n, &active_symbols, node) { | |
175 | syme->snap_count = syme->count[0]; | |
176 | if (syme->snap_count != 0) { | |
177 | syme->weight = sym_weight(syme); | |
de04687f | 178 | rb_insert_active_sym(&tmp, syme); |
2debbc83 | 179 | sum_ksamples += syme->snap_count; |
d94b9430 MG |
180 | |
181 | for (j = 0; j < nr_counters; j++) | |
de04687f ACM |
182 | syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8; |
183 | } else | |
c44613a4 | 184 | list_remove_active_sym(syme); |
d94b9430 MG |
185 | } |
186 | ||
0f5486b5 | 187 | puts(CONSOLE_CLEAR); |
07800601 IM |
188 | |
189 | printf( | |
190 | "------------------------------------------------------------------------------\n"); | |
f2521b6e | 191 | printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [", |
2debbc83 IM |
192 | samples_per_sec, |
193 | 100.0 - (100.0*((samples_per_sec-ksamples_per_sec)/samples_per_sec))); | |
07800601 | 194 | |
cf1f4574 | 195 | if (nr_counters == 1) { |
a21ca2ca | 196 | printf("%Ld", attrs[0].sample_period); |
cf1f4574 IM |
197 | if (freq) |
198 | printf("Hz "); | |
199 | else | |
200 | printf(" "); | |
201 | } | |
07800601 IM |
202 | |
203 | for (counter = 0; counter < nr_counters; counter++) { | |
204 | if (counter) | |
205 | printf("/"); | |
206 | ||
207 | printf("%s", event_name(counter)); | |
208 | } | |
209 | ||
210 | printf( "], "); | |
211 | ||
b456bae0 IM |
212 | if (target_pid != -1) |
213 | printf(" (target_pid: %d", target_pid); | |
07800601 IM |
214 | else |
215 | printf(" (all"); | |
216 | ||
217 | if (profile_cpu != -1) | |
218 | printf(", cpu: %d)\n", profile_cpu); | |
219 | else { | |
b456bae0 | 220 | if (target_pid != -1) |
07800601 IM |
221 | printf(")\n"); |
222 | else | |
223 | printf(", %d CPUs)\n", nr_cpus); | |
224 | } | |
225 | ||
226 | printf("------------------------------------------------------------------------------\n\n"); | |
227 | ||
228 | if (nr_counters == 1) | |
2debbc83 | 229 | printf(" samples pcnt"); |
07800601 | 230 | else |
2debbc83 | 231 | printf(" weight samples pcnt"); |
07800601 IM |
232 | |
233 | printf(" RIP kernel function\n" | |
2debbc83 | 234 | " ______ _______ _____ ________________ _______________\n\n" |
07800601 IM |
235 | ); |
236 | ||
de04687f ACM |
237 | for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) { |
238 | struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node); | |
239 | struct symbol *sym = (struct symbol *)(syme + 1); | |
8fc0321f IM |
240 | char *color = PERF_COLOR_NORMAL; |
241 | double pcnt; | |
d94b9430 | 242 | |
6e53cdf1 | 243 | if (++printed > print_entries || syme->snap_count < count_filter) |
c44613a4 | 244 | continue; |
d94b9430 | 245 | |
2debbc83 IM |
246 | pcnt = 100.0 - (100.0 * ((sum_ksamples - syme->snap_count) / |
247 | sum_ksamples)); | |
d94b9430 | 248 | |
8fc0321f IM |
249 | /* |
250 | * We color high-overhead entries in red, low-overhead | |
251 | * entries in green - and keep the middle ground normal: | |
252 | */ | |
253 | if (pcnt >= 5.0) | |
254 | color = PERF_COLOR_RED; | |
255 | if (pcnt < 0.5) | |
256 | color = PERF_COLOR_GREEN; | |
257 | ||
d94b9430 | 258 | if (nr_counters == 1) |
2debbc83 | 259 | printf("%20.2f - ", syme->weight); |
d94b9430 | 260 | else |
2debbc83 | 261 | printf("%9.1f %10ld - ", syme->weight, syme->snap_count); |
8fc0321f IM |
262 | |
263 | color_fprintf(stdout, color, "%4.1f%%", pcnt); | |
264 | printf(" - %016llx : %s\n", sym->start, sym->name); | |
07800601 | 265 | } |
07800601 IM |
266 | } |
267 | ||
268 | static void *display_thread(void *arg) | |
269 | { | |
0f5486b5 FW |
270 | struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; |
271 | int delay_msecs = delay_secs * 1000; | |
272 | ||
f2521b6e | 273 | printf("PerfTop refresh period: %d seconds\n", delay_secs); |
07800601 | 274 | |
0f5486b5 | 275 | do { |
07800601 | 276 | print_sym_table(); |
0f5486b5 FW |
277 | } while (!poll(&stdin_poll, 1, delay_msecs) == 1); |
278 | ||
279 | printf("key pressed - exiting.\n"); | |
280 | exit(0); | |
07800601 IM |
281 | |
282 | return NULL; | |
283 | } | |
284 | ||
de04687f | 285 | static int symbol_filter(struct dso *self, struct symbol *sym) |
07800601 | 286 | { |
de04687f ACM |
287 | static int filter_match; |
288 | struct sym_entry *syme; | |
289 | const char *name = sym->name; | |
290 | ||
291 | if (!strcmp(name, "_text") || | |
292 | !strcmp(name, "_etext") || | |
293 | !strcmp(name, "_sinittext") || | |
294 | !strncmp("init_module", name, 11) || | |
295 | !strncmp("cleanup_module", name, 14) || | |
296 | strstr(name, "_text_start") || | |
297 | strstr(name, "_text_end")) | |
07800601 | 298 | return 1; |
07800601 | 299 | |
de04687f | 300 | syme = dso__sym_priv(self, sym); |
2debbc83 | 301 | /* Tag samples to be skipped. */ |
de04687f ACM |
302 | if (!strcmp("default_idle", name) || |
303 | !strcmp("cpu_idle", name) || | |
304 | !strcmp("enter_idle", name) || | |
305 | !strcmp("exit_idle", name) || | |
306 | !strcmp("mwait_idle", name)) | |
307 | syme->skip = 1; | |
07800601 IM |
308 | |
309 | if (filter_match == 1) { | |
de04687f | 310 | filter_end = sym->start; |
07800601 IM |
311 | filter_match = -1; |
312 | if (filter_end - filter_start > 10000) { | |
de04687f ACM |
313 | fprintf(stderr, |
314 | "hm, too large filter symbol <%s> - skipping.\n", | |
07800601 | 315 | sym_filter); |
de04687f ACM |
316 | fprintf(stderr, "symbol filter start: %016lx\n", |
317 | filter_start); | |
318 | fprintf(stderr, " end: %016lx\n", | |
319 | filter_end); | |
07800601 IM |
320 | filter_end = filter_start = 0; |
321 | sym_filter = NULL; | |
322 | sleep(1); | |
323 | } | |
324 | } | |
de04687f ACM |
325 | |
326 | if (filter_match == 0 && sym_filter && !strcmp(name, sym_filter)) { | |
07800601 | 327 | filter_match = 1; |
de04687f | 328 | filter_start = sym->start; |
07800601 IM |
329 | } |
330 | ||
de04687f | 331 | |
07800601 IM |
332 | return 0; |
333 | } | |
334 | ||
de04687f | 335 | static int parse_symbols(void) |
07800601 | 336 | { |
de04687f ACM |
337 | struct rb_node *node; |
338 | struct symbol *sym; | |
07800601 | 339 | |
de04687f ACM |
340 | kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry)); |
341 | if (kernel_dso == NULL) | |
342 | return -1; | |
07800601 | 343 | |
bd74137e | 344 | if (dso__load_kernel(kernel_dso, NULL, symbol_filter, 1) != 0) |
de04687f | 345 | goto out_delete_dso; |
07800601 | 346 | |
de04687f ACM |
347 | node = rb_first(&kernel_dso->syms); |
348 | sym = rb_entry(node, struct symbol, rb_node); | |
349 | min_ip = sym->start; | |
07800601 | 350 | |
de04687f ACM |
351 | node = rb_last(&kernel_dso->syms); |
352 | sym = rb_entry(node, struct symbol, rb_node); | |
da417a75 | 353 | max_ip = sym->end; |
07800601 | 354 | |
de04687f | 355 | if (dump_symtab) |
a3ec8d70 | 356 | dso__fprintf(kernel_dso, stderr); |
07800601 | 357 | |
de04687f | 358 | return 0; |
07800601 | 359 | |
de04687f ACM |
360 | out_delete_dso: |
361 | dso__delete(kernel_dso); | |
362 | kernel_dso = NULL; | |
363 | return -1; | |
07800601 IM |
364 | } |
365 | ||
07800601 IM |
366 | #define TRACE_COUNT 3 |
367 | ||
07800601 IM |
368 | /* |
369 | * Binary search in the histogram table and record the hit: | |
370 | */ | |
371 | static void record_ip(uint64_t ip, int counter) | |
372 | { | |
de04687f | 373 | struct symbol *sym = dso__find_symbol(kernel_dso, ip); |
07800601 | 374 | |
de04687f ACM |
375 | if (sym != NULL) { |
376 | struct sym_entry *syme = dso__sym_priv(kernel_dso, sym); | |
07800601 | 377 | |
de04687f ACM |
378 | if (!syme->skip) { |
379 | syme->count[counter]++; | |
c44613a4 | 380 | pthread_mutex_lock(&active_symbols_lock); |
de04687f | 381 | if (list_empty(&syme->node) || !syme->node.next) |
c44613a4 ACM |
382 | __list_insert_active_sym(syme); |
383 | pthread_mutex_unlock(&active_symbols_lock); | |
de04687f | 384 | return; |
07800601 | 385 | } |
07800601 IM |
386 | } |
387 | ||
2debbc83 | 388 | samples--; |
07800601 IM |
389 | } |
390 | ||
391 | static void process_event(uint64_t ip, int counter) | |
392 | { | |
2debbc83 | 393 | samples++; |
07800601 IM |
394 | |
395 | if (ip < min_ip || ip > max_ip) { | |
2debbc83 | 396 | userspace_samples++; |
07800601 IM |
397 | return; |
398 | } | |
399 | ||
400 | record_ip(ip, counter); | |
401 | } | |
402 | ||
07800601 | 403 | struct mmap_data { |
a21ca2ca IM |
404 | int counter; |
405 | void *base; | |
406 | unsigned int mask; | |
407 | unsigned int prev; | |
07800601 IM |
408 | }; |
409 | ||
410 | static unsigned int mmap_read_head(struct mmap_data *md) | |
411 | { | |
412 | struct perf_counter_mmap_page *pc = md->base; | |
413 | int head; | |
414 | ||
415 | head = pc->data_head; | |
416 | rmb(); | |
417 | ||
418 | return head; | |
419 | } | |
420 | ||
421 | struct timeval last_read, this_read; | |
422 | ||
423 | static void mmap_read(struct mmap_data *md) | |
424 | { | |
425 | unsigned int head = mmap_read_head(md); | |
426 | unsigned int old = md->prev; | |
427 | unsigned char *data = md->base + page_size; | |
428 | int diff; | |
429 | ||
430 | gettimeofday(&this_read, NULL); | |
431 | ||
432 | /* | |
433 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 434 | * the writer will bite our tail and mess up the samples under us. |
07800601 IM |
435 | * |
436 | * If we somehow ended up ahead of the head, we got messed up. | |
437 | * | |
438 | * In either case, truncate and restart at head. | |
439 | */ | |
440 | diff = head - old; | |
441 | if (diff > md->mask / 2 || diff < 0) { | |
442 | struct timeval iv; | |
443 | unsigned long msecs; | |
444 | ||
445 | timersub(&this_read, &last_read, &iv); | |
446 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
447 | ||
448 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
449 | " Last read %lu msecs ago.\n", msecs); | |
450 | ||
451 | /* | |
452 | * head points to a known good entry, start there. | |
453 | */ | |
454 | old = head; | |
455 | } | |
456 | ||
457 | last_read = this_read; | |
458 | ||
459 | for (; old != head;) { | |
460 | struct ip_event { | |
461 | struct perf_event_header header; | |
462 | __u64 ip; | |
b456bae0 | 463 | __u32 pid, target_pid; |
07800601 IM |
464 | }; |
465 | struct mmap_event { | |
466 | struct perf_event_header header; | |
b456bae0 | 467 | __u32 pid, target_pid; |
07800601 IM |
468 | __u64 start; |
469 | __u64 len; | |
470 | __u64 pgoff; | |
471 | char filename[PATH_MAX]; | |
472 | }; | |
473 | ||
474 | typedef union event_union { | |
475 | struct perf_event_header header; | |
476 | struct ip_event ip; | |
477 | struct mmap_event mmap; | |
478 | } event_t; | |
479 | ||
480 | event_t *event = (event_t *)&data[old & md->mask]; | |
481 | ||
482 | event_t event_copy; | |
483 | ||
6f06ccbc | 484 | size_t size = event->header.size; |
07800601 IM |
485 | |
486 | /* | |
487 | * Event straddles the mmap boundary -- header should always | |
488 | * be inside due to u64 alignment of output. | |
489 | */ | |
490 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
491 | unsigned int offset = old; | |
492 | unsigned int len = min(sizeof(*event), size), cpy; | |
493 | void *dst = &event_copy; | |
494 | ||
495 | do { | |
496 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
497 | memcpy(dst, &data[offset & md->mask], cpy); | |
498 | offset += cpy; | |
499 | dst += cpy; | |
500 | len -= cpy; | |
501 | } while (len); | |
502 | ||
503 | event = &event_copy; | |
504 | } | |
505 | ||
506 | old += size; | |
507 | ||
508 | if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) { | |
c70975bc | 509 | if (event->header.type & PERF_SAMPLE_IP) |
07800601 | 510 | process_event(event->ip.ip, md->counter); |
07800601 IM |
511 | } |
512 | } | |
513 | ||
514 | md->prev = old; | |
515 | } | |
516 | ||
c2990a2a MG |
517 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; |
518 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; | |
519 | ||
b456bae0 | 520 | static int __cmd_top(void) |
07800601 | 521 | { |
a21ca2ca | 522 | struct perf_counter_attr *attr; |
07800601 IM |
523 | pthread_t thread; |
524 | int i, counter, group_fd, nr_poll = 0; | |
525 | unsigned int cpu; | |
526 | int ret; | |
527 | ||
07800601 IM |
528 | for (i = 0; i < nr_cpus; i++) { |
529 | group_fd = -1; | |
530 | for (counter = 0; counter < nr_counters; counter++) { | |
531 | ||
532 | cpu = profile_cpu; | |
b456bae0 | 533 | if (target_pid == -1 && profile_cpu == -1) |
07800601 IM |
534 | cpu = i; |
535 | ||
a21ca2ca | 536 | attr = attrs + counter; |
07800601 | 537 | |
a21ca2ca IM |
538 | attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
539 | attr->freq = freq; | |
540 | ||
541 | fd[i][counter] = sys_perf_counter_open(attr, target_pid, cpu, group_fd, 0); | |
07800601 IM |
542 | if (fd[i][counter] < 0) { |
543 | int err = errno; | |
f2521b6e IM |
544 | |
545 | error("syscall returned with %d (%s)\n", | |
07800601 IM |
546 | fd[i][counter], strerror(err)); |
547 | if (err == EPERM) | |
548 | printf("Are you root?\n"); | |
549 | exit(-1); | |
550 | } | |
551 | assert(fd[i][counter] >= 0); | |
552 | fcntl(fd[i][counter], F_SETFL, O_NONBLOCK); | |
553 | ||
554 | /* | |
555 | * First counter acts as the group leader: | |
556 | */ | |
557 | if (group && group_fd == -1) | |
558 | group_fd = fd[i][counter]; | |
559 | ||
560 | event_array[nr_poll].fd = fd[i][counter]; | |
561 | event_array[nr_poll].events = POLLIN; | |
562 | nr_poll++; | |
563 | ||
564 | mmap_array[i][counter].counter = counter; | |
565 | mmap_array[i][counter].prev = 0; | |
566 | mmap_array[i][counter].mask = mmap_pages*page_size - 1; | |
567 | mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
568 | PROT_READ, MAP_SHARED, fd[i][counter], 0); | |
f2521b6e IM |
569 | if (mmap_array[i][counter].base == MAP_FAILED) |
570 | die("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
07800601 IM |
571 | } |
572 | } | |
573 | ||
574 | if (pthread_create(&thread, NULL, display_thread, NULL)) { | |
575 | printf("Could not create display thread.\n"); | |
576 | exit(-1); | |
577 | } | |
578 | ||
579 | if (realtime_prio) { | |
580 | struct sched_param param; | |
581 | ||
582 | param.sched_priority = realtime_prio; | |
583 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
584 | printf("Could not set realtime priority.\n"); | |
585 | exit(-1); | |
586 | } | |
587 | } | |
588 | ||
589 | while (1) { | |
2debbc83 | 590 | int hits = samples; |
07800601 IM |
591 | |
592 | for (i = 0; i < nr_cpus; i++) { | |
593 | for (counter = 0; counter < nr_counters; counter++) | |
594 | mmap_read(&mmap_array[i][counter]); | |
595 | } | |
596 | ||
2debbc83 | 597 | if (hits == samples) |
07800601 IM |
598 | ret = poll(event_array, nr_poll, 100); |
599 | } | |
600 | ||
601 | return 0; | |
602 | } | |
b456bae0 IM |
603 | |
604 | static const char * const top_usage[] = { | |
605 | "perf top [<options>]", | |
606 | NULL | |
607 | }; | |
608 | ||
609 | static char events_help_msg[EVENTS_HELP_MAX]; | |
610 | ||
611 | static const struct option options[] = { | |
612 | OPT_CALLBACK('e', "event", NULL, "event", | |
613 | events_help_msg, parse_events), | |
614 | OPT_INTEGER('c', "count", &default_interval, | |
615 | "event period to sample"), | |
616 | OPT_INTEGER('p', "pid", &target_pid, | |
617 | "profile events on existing pid"), | |
618 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
619 | "system-wide collection from all CPUs"), | |
620 | OPT_INTEGER('C', "CPU", &profile_cpu, | |
621 | "CPU to profile on"), | |
622 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, | |
623 | "number of mmap data pages"), | |
624 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
625 | "collect data with this RT SCHED_FIFO priority"), | |
db20c003 | 626 | OPT_INTEGER('d', "delay", &delay_secs, |
b456bae0 IM |
627 | "number of seconds to delay between refreshes"), |
628 | OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, | |
629 | "dump the symbol table used for profiling"), | |
6e53cdf1 | 630 | OPT_INTEGER('f', "count-filter", &count_filter, |
b456bae0 IM |
631 | "only display functions with more events than this"), |
632 | OPT_BOOLEAN('g', "group", &group, | |
633 | "put the counters into a counter group"), | |
634 | OPT_STRING('s', "sym-filter", &sym_filter, "pattern", | |
635 | "only display symbols matchig this pattern"), | |
636 | OPT_BOOLEAN('z', "zero", &group, | |
637 | "zero history across updates"), | |
6e53cdf1 | 638 | OPT_INTEGER('F', "freq", &freq, |
b456bae0 | 639 | "profile at this frequency"), |
6e53cdf1 IM |
640 | OPT_INTEGER('E', "entries", &print_entries, |
641 | "display this many functions"), | |
b456bae0 IM |
642 | OPT_END() |
643 | }; | |
644 | ||
645 | int cmd_top(int argc, const char **argv, const char *prefix) | |
646 | { | |
647 | int counter; | |
648 | ||
649 | page_size = sysconf(_SC_PAGE_SIZE); | |
650 | ||
651 | create_events_help(events_help_msg); | |
b456bae0 IM |
652 | |
653 | argc = parse_options(argc, argv, options, top_usage, 0); | |
654 | if (argc) | |
655 | usage_with_options(top_usage, options); | |
656 | ||
657 | if (freq) { | |
658 | default_interval = freq; | |
659 | freq = 1; | |
660 | } | |
661 | ||
662 | /* CPU and PID are mutually exclusive */ | |
663 | if (target_pid != -1 && profile_cpu != -1) { | |
664 | printf("WARNING: PID switch overriding CPU\n"); | |
665 | sleep(1); | |
666 | profile_cpu = -1; | |
667 | } | |
668 | ||
a21ca2ca | 669 | if (!nr_counters) |
b456bae0 | 670 | nr_counters = 1; |
b456bae0 | 671 | |
2f335a02 FW |
672 | if (delay_secs < 1) |
673 | delay_secs = 1; | |
674 | ||
a21ca2ca IM |
675 | parse_symbols(); |
676 | ||
677 | /* | |
678 | * Fill in the ones not specifically initialized via -c: | |
679 | */ | |
b456bae0 | 680 | for (counter = 0; counter < nr_counters; counter++) { |
a21ca2ca | 681 | if (attrs[counter].sample_period) |
b456bae0 IM |
682 | continue; |
683 | ||
a21ca2ca | 684 | attrs[counter].sample_period = default_interval; |
b456bae0 IM |
685 | } |
686 | ||
687 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
688 | assert(nr_cpus <= MAX_NR_CPUS); | |
689 | assert(nr_cpus >= 0); | |
690 | ||
691 | if (target_pid != -1 || profile_cpu != -1) | |
692 | nr_cpus = 1; | |
693 | ||
b456bae0 IM |
694 | return __cmd_top(); |
695 | } |