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" |
148be2c1 | 24 | #include "util/util.h" |
de04687f | 25 | #include "util/rbtree.h" |
b456bae0 IM |
26 | #include "util/parse-options.h" |
27 | #include "util/parse-events.h" | |
07800601 | 28 | |
07800601 IM |
29 | #include <assert.h> |
30 | #include <fcntl.h> | |
0e9b20b8 | 31 | |
07800601 | 32 | #include <stdio.h> |
0e9b20b8 | 33 | |
07800601 | 34 | #include <errno.h> |
07800601 IM |
35 | #include <time.h> |
36 | #include <sched.h> | |
37 | #include <pthread.h> | |
38 | ||
39 | #include <sys/syscall.h> | |
40 | #include <sys/ioctl.h> | |
41 | #include <sys/poll.h> | |
42 | #include <sys/prctl.h> | |
43 | #include <sys/wait.h> | |
44 | #include <sys/uio.h> | |
45 | #include <sys/mman.h> | |
46 | ||
47 | #include <linux/unistd.h> | |
48 | #include <linux/types.h> | |
49 | ||
07800601 IM |
50 | static int system_wide = 0; |
51 | ||
b456bae0 | 52 | static __u64 default_event_id[MAX_COUNTERS] = { |
07800601 IM |
53 | EID(PERF_TYPE_SOFTWARE, PERF_COUNT_TASK_CLOCK), |
54 | EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CONTEXT_SWITCHES), | |
55 | EID(PERF_TYPE_SOFTWARE, PERF_COUNT_CPU_MIGRATIONS), | |
56 | EID(PERF_TYPE_SOFTWARE, PERF_COUNT_PAGE_FAULTS), | |
57 | ||
58 | EID(PERF_TYPE_HARDWARE, PERF_COUNT_CPU_CYCLES), | |
59 | EID(PERF_TYPE_HARDWARE, PERF_COUNT_INSTRUCTIONS), | |
60 | EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_REFERENCES), | |
61 | EID(PERF_TYPE_HARDWARE, PERF_COUNT_CACHE_MISSES), | |
62 | }; | |
63 | static int default_interval = 100000; | |
64 | static int event_count[MAX_COUNTERS]; | |
65 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; | |
66 | ||
67 | static __u64 count_filter = 100; | |
68 | ||
b456bae0 | 69 | static int target_pid = -1; |
07800601 IM |
70 | static int profile_cpu = -1; |
71 | static int nr_cpus = 0; | |
07800601 IM |
72 | static unsigned int realtime_prio = 0; |
73 | static int group = 0; | |
74 | static unsigned int page_size; | |
75 | static unsigned int mmap_pages = 16; | |
76 | static int use_mmap = 0; | |
77 | static int use_munmap = 0; | |
f5456a6b | 78 | static int freq = 0; |
07800601 | 79 | |
07800601 IM |
80 | static char *sym_filter; |
81 | static unsigned long filter_start; | |
82 | static unsigned long filter_end; | |
83 | ||
84 | static int delay_secs = 2; | |
85 | static int zero; | |
86 | static int dump_symtab; | |
87 | ||
ddcacfa0 | 88 | static const unsigned int default_count[] = { |
07800601 IM |
89 | 1000000, |
90 | 1000000, | |
91 | 10000, | |
92 | 10000, | |
93 | 1000000, | |
94 | 10000, | |
95 | }; | |
96 | ||
07800601 IM |
97 | /* |
98 | * Symbols | |
99 | */ | |
100 | ||
101 | static uint64_t min_ip; | |
102 | static uint64_t max_ip = -1ll; | |
103 | ||
104 | struct sym_entry { | |
de04687f ACM |
105 | struct rb_node rb_node; |
106 | struct list_head node; | |
07800601 | 107 | unsigned long count[MAX_COUNTERS]; |
c44613a4 ACM |
108 | unsigned long snap_count; |
109 | double weight; | |
07800601 | 110 | int skip; |
07800601 IM |
111 | }; |
112 | ||
07800601 IM |
113 | struct sym_entry *sym_filter_entry; |
114 | ||
de04687f ACM |
115 | struct dso *kernel_dso; |
116 | ||
117 | /* | |
118 | * Symbols will be added here in record_ip and will get out | |
119 | * after decayed. | |
120 | */ | |
121 | static LIST_HEAD(active_symbols); | |
c44613a4 | 122 | static pthread_mutex_t active_symbols_lock = PTHREAD_MUTEX_INITIALIZER; |
07800601 | 123 | |
07800601 IM |
124 | /* |
125 | * Ordering weight: count-1 * count-2 * ... / count-n | |
126 | */ | |
127 | static double sym_weight(const struct sym_entry *sym) | |
128 | { | |
c44613a4 | 129 | double weight = sym->snap_count; |
07800601 IM |
130 | int counter; |
131 | ||
07800601 IM |
132 | for (counter = 1; counter < nr_counters-1; counter++) |
133 | weight *= sym->count[counter]; | |
134 | ||
135 | weight /= (sym->count[counter] + 1); | |
136 | ||
137 | return weight; | |
138 | } | |
139 | ||
07800601 IM |
140 | static long events; |
141 | static long userspace_events; | |
142 | static const char CONSOLE_CLEAR[] = "\e[H\e[2J"; | |
143 | ||
c44613a4 | 144 | static void __list_insert_active_sym(struct sym_entry *syme) |
de04687f ACM |
145 | { |
146 | list_add(&syme->node, &active_symbols); | |
147 | } | |
148 | ||
c44613a4 ACM |
149 | static void list_remove_active_sym(struct sym_entry *syme) |
150 | { | |
151 | pthread_mutex_lock(&active_symbols_lock); | |
152 | list_del_init(&syme->node); | |
153 | pthread_mutex_unlock(&active_symbols_lock); | |
154 | } | |
155 | ||
de04687f ACM |
156 | static void rb_insert_active_sym(struct rb_root *tree, struct sym_entry *se) |
157 | { | |
158 | struct rb_node **p = &tree->rb_node; | |
159 | struct rb_node *parent = NULL; | |
160 | struct sym_entry *iter; | |
161 | ||
162 | while (*p != NULL) { | |
163 | parent = *p; | |
164 | iter = rb_entry(parent, struct sym_entry, rb_node); | |
165 | ||
c44613a4 | 166 | if (se->weight > iter->weight) |
de04687f ACM |
167 | p = &(*p)->rb_left; |
168 | else | |
169 | p = &(*p)->rb_right; | |
170 | } | |
171 | ||
172 | rb_link_node(&se->rb_node, parent, p); | |
173 | rb_insert_color(&se->rb_node, tree); | |
174 | } | |
07800601 IM |
175 | |
176 | static void print_sym_table(void) | |
177 | { | |
233f0b95 | 178 | int printed = 0, j; |
07800601 IM |
179 | int counter; |
180 | float events_per_sec = events/delay_secs; | |
181 | float kevents_per_sec = (events-userspace_events)/delay_secs; | |
182 | float sum_kevents = 0.0; | |
de04687f ACM |
183 | struct sym_entry *syme, *n; |
184 | struct rb_root tmp = RB_ROOT; | |
185 | struct rb_node *nd; | |
07800601 IM |
186 | |
187 | events = userspace_events = 0; | |
07800601 | 188 | |
de04687f | 189 | /* Sort the active symbols */ |
c44613a4 ACM |
190 | pthread_mutex_lock(&active_symbols_lock); |
191 | syme = list_entry(active_symbols.next, struct sym_entry, node); | |
192 | pthread_mutex_unlock(&active_symbols_lock); | |
193 | ||
194 | list_for_each_entry_safe_from(syme, n, &active_symbols, node) { | |
195 | syme->snap_count = syme->count[0]; | |
196 | if (syme->snap_count != 0) { | |
197 | syme->weight = sym_weight(syme); | |
de04687f | 198 | rb_insert_active_sym(&tmp, syme); |
c44613a4 | 199 | sum_kevents += syme->snap_count; |
d94b9430 MG |
200 | |
201 | for (j = 0; j < nr_counters; j++) | |
de04687f ACM |
202 | syme->count[j] = zero ? 0 : syme->count[j] * 7 / 8; |
203 | } else | |
c44613a4 | 204 | list_remove_active_sym(syme); |
d94b9430 MG |
205 | } |
206 | ||
07800601 IM |
207 | write(1, CONSOLE_CLEAR, strlen(CONSOLE_CLEAR)); |
208 | ||
209 | printf( | |
210 | "------------------------------------------------------------------------------\n"); | |
f2521b6e | 211 | printf( " PerfTop:%8.0f irqs/sec kernel:%4.1f%% [", |
07800601 | 212 | events_per_sec, |
f91183fe | 213 | 100.0 - (100.0*((events_per_sec-kevents_per_sec)/events_per_sec))); |
07800601 IM |
214 | |
215 | if (nr_counters == 1) | |
216 | printf("%d ", event_count[0]); | |
217 | ||
218 | for (counter = 0; counter < nr_counters; counter++) { | |
219 | if (counter) | |
220 | printf("/"); | |
221 | ||
222 | printf("%s", event_name(counter)); | |
223 | } | |
224 | ||
225 | printf( "], "); | |
226 | ||
b456bae0 IM |
227 | if (target_pid != -1) |
228 | printf(" (target_pid: %d", target_pid); | |
07800601 IM |
229 | else |
230 | printf(" (all"); | |
231 | ||
232 | if (profile_cpu != -1) | |
233 | printf(", cpu: %d)\n", profile_cpu); | |
234 | else { | |
b456bae0 | 235 | if (target_pid != -1) |
07800601 IM |
236 | printf(")\n"); |
237 | else | |
238 | printf(", %d CPUs)\n", nr_cpus); | |
239 | } | |
240 | ||
241 | printf("------------------------------------------------------------------------------\n\n"); | |
242 | ||
243 | if (nr_counters == 1) | |
244 | printf(" events pcnt"); | |
245 | else | |
246 | printf(" weight events pcnt"); | |
247 | ||
248 | printf(" RIP kernel function\n" | |
249 | " ______ ______ _____ ________________ _______________\n\n" | |
250 | ); | |
251 | ||
de04687f ACM |
252 | for (nd = rb_first(&tmp); nd; nd = rb_next(nd)) { |
253 | struct sym_entry *syme = rb_entry(nd, struct sym_entry, rb_node); | |
254 | struct symbol *sym = (struct symbol *)(syme + 1); | |
07800601 | 255 | float pcnt; |
d94b9430 | 256 | |
c44613a4 ACM |
257 | if (++printed > 18 || syme->snap_count < count_filter) |
258 | continue; | |
d94b9430 | 259 | |
c44613a4 | 260 | pcnt = 100.0 - (100.0 * ((sum_kevents - syme->snap_count) / |
de04687f | 261 | sum_kevents)); |
d94b9430 MG |
262 | |
263 | if (nr_counters == 1) | |
264 | printf("%19.2f - %4.1f%% - %016llx : %s\n", | |
c44613a4 | 265 | syme->weight, pcnt, sym->start, sym->name); |
d94b9430 MG |
266 | else |
267 | printf("%8.1f %10ld - %4.1f%% - %016llx : %s\n", | |
c44613a4 | 268 | syme->weight, syme->snap_count, |
de04687f | 269 | pcnt, sym->start, sym->name); |
07800601 IM |
270 | } |
271 | ||
07800601 IM |
272 | { |
273 | struct pollfd stdin_poll = { .fd = 0, .events = POLLIN }; | |
274 | ||
275 | if (poll(&stdin_poll, 1, 0) == 1) { | |
276 | printf("key pressed - exiting.\n"); | |
277 | exit(0); | |
278 | } | |
279 | } | |
280 | } | |
281 | ||
282 | static void *display_thread(void *arg) | |
283 | { | |
f2521b6e | 284 | printf("PerfTop refresh period: %d seconds\n", delay_secs); |
07800601 IM |
285 | |
286 | while (!sleep(delay_secs)) | |
287 | print_sym_table(); | |
288 | ||
289 | return NULL; | |
290 | } | |
291 | ||
de04687f | 292 | static int symbol_filter(struct dso *self, struct symbol *sym) |
07800601 | 293 | { |
de04687f ACM |
294 | static int filter_match; |
295 | struct sym_entry *syme; | |
296 | const char *name = sym->name; | |
297 | ||
298 | if (!strcmp(name, "_text") || | |
299 | !strcmp(name, "_etext") || | |
300 | !strcmp(name, "_sinittext") || | |
301 | !strncmp("init_module", name, 11) || | |
302 | !strncmp("cleanup_module", name, 14) || | |
303 | strstr(name, "_text_start") || | |
304 | strstr(name, "_text_end")) | |
07800601 | 305 | return 1; |
07800601 | 306 | |
de04687f | 307 | syme = dso__sym_priv(self, sym); |
07800601 | 308 | /* Tag events to be skipped. */ |
de04687f ACM |
309 | if (!strcmp("default_idle", name) || |
310 | !strcmp("cpu_idle", name) || | |
311 | !strcmp("enter_idle", name) || | |
312 | !strcmp("exit_idle", name) || | |
313 | !strcmp("mwait_idle", name)) | |
314 | syme->skip = 1; | |
07800601 IM |
315 | |
316 | if (filter_match == 1) { | |
de04687f | 317 | filter_end = sym->start; |
07800601 IM |
318 | filter_match = -1; |
319 | if (filter_end - filter_start > 10000) { | |
de04687f ACM |
320 | fprintf(stderr, |
321 | "hm, too large filter symbol <%s> - skipping.\n", | |
07800601 | 322 | sym_filter); |
de04687f ACM |
323 | fprintf(stderr, "symbol filter start: %016lx\n", |
324 | filter_start); | |
325 | fprintf(stderr, " end: %016lx\n", | |
326 | filter_end); | |
07800601 IM |
327 | filter_end = filter_start = 0; |
328 | sym_filter = NULL; | |
329 | sleep(1); | |
330 | } | |
331 | } | |
de04687f ACM |
332 | |
333 | if (filter_match == 0 && sym_filter && !strcmp(name, sym_filter)) { | |
07800601 | 334 | filter_match = 1; |
de04687f | 335 | filter_start = sym->start; |
07800601 IM |
336 | } |
337 | ||
de04687f | 338 | |
07800601 IM |
339 | return 0; |
340 | } | |
341 | ||
de04687f | 342 | static int parse_symbols(void) |
07800601 | 343 | { |
de04687f ACM |
344 | struct rb_node *node; |
345 | struct symbol *sym; | |
07800601 | 346 | |
de04687f ACM |
347 | kernel_dso = dso__new("[kernel]", sizeof(struct sym_entry)); |
348 | if (kernel_dso == NULL) | |
349 | return -1; | |
07800601 | 350 | |
de04687f ACM |
351 | if (dso__load_kernel(kernel_dso, NULL, symbol_filter) != 0) |
352 | goto out_delete_dso; | |
07800601 | 353 | |
de04687f ACM |
354 | node = rb_first(&kernel_dso->syms); |
355 | sym = rb_entry(node, struct symbol, rb_node); | |
356 | min_ip = sym->start; | |
07800601 | 357 | |
de04687f ACM |
358 | node = rb_last(&kernel_dso->syms); |
359 | sym = rb_entry(node, struct symbol, rb_node); | |
da417a75 | 360 | max_ip = sym->end; |
07800601 | 361 | |
de04687f | 362 | if (dump_symtab) |
a3ec8d70 | 363 | dso__fprintf(kernel_dso, stderr); |
07800601 | 364 | |
de04687f | 365 | return 0; |
07800601 | 366 | |
de04687f ACM |
367 | out_delete_dso: |
368 | dso__delete(kernel_dso); | |
369 | kernel_dso = NULL; | |
370 | return -1; | |
07800601 IM |
371 | } |
372 | ||
07800601 IM |
373 | #define TRACE_COUNT 3 |
374 | ||
07800601 IM |
375 | /* |
376 | * Binary search in the histogram table and record the hit: | |
377 | */ | |
378 | static void record_ip(uint64_t ip, int counter) | |
379 | { | |
de04687f | 380 | struct symbol *sym = dso__find_symbol(kernel_dso, ip); |
07800601 | 381 | |
de04687f ACM |
382 | if (sym != NULL) { |
383 | struct sym_entry *syme = dso__sym_priv(kernel_dso, sym); | |
07800601 | 384 | |
de04687f ACM |
385 | if (!syme->skip) { |
386 | syme->count[counter]++; | |
c44613a4 | 387 | pthread_mutex_lock(&active_symbols_lock); |
de04687f | 388 | if (list_empty(&syme->node) || !syme->node.next) |
c44613a4 ACM |
389 | __list_insert_active_sym(syme); |
390 | pthread_mutex_unlock(&active_symbols_lock); | |
de04687f | 391 | return; |
07800601 | 392 | } |
07800601 IM |
393 | } |
394 | ||
de04687f | 395 | events--; |
07800601 IM |
396 | } |
397 | ||
398 | static void process_event(uint64_t ip, int counter) | |
399 | { | |
400 | events++; | |
401 | ||
402 | if (ip < min_ip || ip > max_ip) { | |
403 | userspace_events++; | |
404 | return; | |
405 | } | |
406 | ||
407 | record_ip(ip, counter); | |
408 | } | |
409 | ||
07800601 IM |
410 | struct mmap_data { |
411 | int counter; | |
412 | void *base; | |
413 | unsigned int mask; | |
414 | unsigned int prev; | |
415 | }; | |
416 | ||
417 | static unsigned int mmap_read_head(struct mmap_data *md) | |
418 | { | |
419 | struct perf_counter_mmap_page *pc = md->base; | |
420 | int head; | |
421 | ||
422 | head = pc->data_head; | |
423 | rmb(); | |
424 | ||
425 | return head; | |
426 | } | |
427 | ||
428 | struct timeval last_read, this_read; | |
429 | ||
430 | static void mmap_read(struct mmap_data *md) | |
431 | { | |
432 | unsigned int head = mmap_read_head(md); | |
433 | unsigned int old = md->prev; | |
434 | unsigned char *data = md->base + page_size; | |
435 | int diff; | |
436 | ||
437 | gettimeofday(&this_read, NULL); | |
438 | ||
439 | /* | |
440 | * If we're further behind than half the buffer, there's a chance | |
441 | * the writer will bite our tail and screw up the events under us. | |
442 | * | |
443 | * If we somehow ended up ahead of the head, we got messed up. | |
444 | * | |
445 | * In either case, truncate and restart at head. | |
446 | */ | |
447 | diff = head - old; | |
448 | if (diff > md->mask / 2 || diff < 0) { | |
449 | struct timeval iv; | |
450 | unsigned long msecs; | |
451 | ||
452 | timersub(&this_read, &last_read, &iv); | |
453 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
454 | ||
455 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
456 | " Last read %lu msecs ago.\n", msecs); | |
457 | ||
458 | /* | |
459 | * head points to a known good entry, start there. | |
460 | */ | |
461 | old = head; | |
462 | } | |
463 | ||
464 | last_read = this_read; | |
465 | ||
466 | for (; old != head;) { | |
467 | struct ip_event { | |
468 | struct perf_event_header header; | |
469 | __u64 ip; | |
b456bae0 | 470 | __u32 pid, target_pid; |
07800601 IM |
471 | }; |
472 | struct mmap_event { | |
473 | struct perf_event_header header; | |
b456bae0 | 474 | __u32 pid, target_pid; |
07800601 IM |
475 | __u64 start; |
476 | __u64 len; | |
477 | __u64 pgoff; | |
478 | char filename[PATH_MAX]; | |
479 | }; | |
480 | ||
481 | typedef union event_union { | |
482 | struct perf_event_header header; | |
483 | struct ip_event ip; | |
484 | struct mmap_event mmap; | |
485 | } event_t; | |
486 | ||
487 | event_t *event = (event_t *)&data[old & md->mask]; | |
488 | ||
489 | event_t event_copy; | |
490 | ||
6f06ccbc | 491 | size_t size = event->header.size; |
07800601 IM |
492 | |
493 | /* | |
494 | * Event straddles the mmap boundary -- header should always | |
495 | * be inside due to u64 alignment of output. | |
496 | */ | |
497 | if ((old & md->mask) + size != ((old + size) & md->mask)) { | |
498 | unsigned int offset = old; | |
499 | unsigned int len = min(sizeof(*event), size), cpy; | |
500 | void *dst = &event_copy; | |
501 | ||
502 | do { | |
503 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
504 | memcpy(dst, &data[offset & md->mask], cpy); | |
505 | offset += cpy; | |
506 | dst += cpy; | |
507 | len -= cpy; | |
508 | } while (len); | |
509 | ||
510 | event = &event_copy; | |
511 | } | |
512 | ||
513 | old += size; | |
514 | ||
515 | if (event->header.misc & PERF_EVENT_MISC_OVERFLOW) { | |
c70975bc | 516 | if (event->header.type & PERF_SAMPLE_IP) |
07800601 IM |
517 | process_event(event->ip.ip, md->counter); |
518 | } else { | |
519 | switch (event->header.type) { | |
520 | case PERF_EVENT_MMAP: | |
521 | case PERF_EVENT_MUNMAP: | |
522 | printf("%s: %Lu %Lu %Lu %s\n", | |
523 | event->header.type == PERF_EVENT_MMAP | |
524 | ? "mmap" : "munmap", | |
525 | event->mmap.start, | |
526 | event->mmap.len, | |
527 | event->mmap.pgoff, | |
528 | event->mmap.filename); | |
529 | break; | |
530 | } | |
531 | } | |
532 | } | |
533 | ||
534 | md->prev = old; | |
535 | } | |
536 | ||
c2990a2a MG |
537 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; |
538 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; | |
539 | ||
b456bae0 | 540 | static int __cmd_top(void) |
07800601 | 541 | { |
c70975bc | 542 | struct perf_counter_attr attr; |
07800601 IM |
543 | pthread_t thread; |
544 | int i, counter, group_fd, nr_poll = 0; | |
545 | unsigned int cpu; | |
546 | int ret; | |
547 | ||
07800601 IM |
548 | for (i = 0; i < nr_cpus; i++) { |
549 | group_fd = -1; | |
550 | for (counter = 0; counter < nr_counters; counter++) { | |
551 | ||
552 | cpu = profile_cpu; | |
b456bae0 | 553 | if (target_pid == -1 && profile_cpu == -1) |
07800601 IM |
554 | cpu = i; |
555 | ||
c70975bc PZ |
556 | memset(&attr, 0, sizeof(attr)); |
557 | attr.config = event_id[counter]; | |
558 | attr.sample_period = event_count[counter]; | |
559 | attr.sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; | |
560 | attr.mmap = use_mmap; | |
561 | attr.munmap = use_munmap; | |
562 | attr.freq = freq; | |
07800601 | 563 | |
c70975bc | 564 | fd[i][counter] = sys_perf_counter_open(&attr, target_pid, cpu, group_fd, 0); |
07800601 IM |
565 | if (fd[i][counter] < 0) { |
566 | int err = errno; | |
f2521b6e IM |
567 | |
568 | error("syscall returned with %d (%s)\n", | |
07800601 IM |
569 | fd[i][counter], strerror(err)); |
570 | if (err == EPERM) | |
571 | printf("Are you root?\n"); | |
572 | exit(-1); | |
573 | } | |
574 | assert(fd[i][counter] >= 0); | |
575 | fcntl(fd[i][counter], F_SETFL, O_NONBLOCK); | |
576 | ||
577 | /* | |
578 | * First counter acts as the group leader: | |
579 | */ | |
580 | if (group && group_fd == -1) | |
581 | group_fd = fd[i][counter]; | |
582 | ||
583 | event_array[nr_poll].fd = fd[i][counter]; | |
584 | event_array[nr_poll].events = POLLIN; | |
585 | nr_poll++; | |
586 | ||
587 | mmap_array[i][counter].counter = counter; | |
588 | mmap_array[i][counter].prev = 0; | |
589 | mmap_array[i][counter].mask = mmap_pages*page_size - 1; | |
590 | mmap_array[i][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
591 | PROT_READ, MAP_SHARED, fd[i][counter], 0); | |
f2521b6e IM |
592 | if (mmap_array[i][counter].base == MAP_FAILED) |
593 | die("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
07800601 IM |
594 | } |
595 | } | |
596 | ||
597 | if (pthread_create(&thread, NULL, display_thread, NULL)) { | |
598 | printf("Could not create display thread.\n"); | |
599 | exit(-1); | |
600 | } | |
601 | ||
602 | if (realtime_prio) { | |
603 | struct sched_param param; | |
604 | ||
605 | param.sched_priority = realtime_prio; | |
606 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
607 | printf("Could not set realtime priority.\n"); | |
608 | exit(-1); | |
609 | } | |
610 | } | |
611 | ||
612 | while (1) { | |
613 | int hits = events; | |
614 | ||
615 | for (i = 0; i < nr_cpus; i++) { | |
616 | for (counter = 0; counter < nr_counters; counter++) | |
617 | mmap_read(&mmap_array[i][counter]); | |
618 | } | |
619 | ||
620 | if (hits == events) | |
621 | ret = poll(event_array, nr_poll, 100); | |
622 | } | |
623 | ||
624 | return 0; | |
625 | } | |
b456bae0 IM |
626 | |
627 | static const char * const top_usage[] = { | |
628 | "perf top [<options>]", | |
629 | NULL | |
630 | }; | |
631 | ||
632 | static char events_help_msg[EVENTS_HELP_MAX]; | |
633 | ||
634 | static const struct option options[] = { | |
635 | OPT_CALLBACK('e', "event", NULL, "event", | |
636 | events_help_msg, parse_events), | |
637 | OPT_INTEGER('c', "count", &default_interval, | |
638 | "event period to sample"), | |
639 | OPT_INTEGER('p', "pid", &target_pid, | |
640 | "profile events on existing pid"), | |
641 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
642 | "system-wide collection from all CPUs"), | |
643 | OPT_INTEGER('C', "CPU", &profile_cpu, | |
644 | "CPU to profile on"), | |
645 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, | |
646 | "number of mmap data pages"), | |
647 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
648 | "collect data with this RT SCHED_FIFO priority"), | |
db20c003 | 649 | OPT_INTEGER('d', "delay", &delay_secs, |
b456bae0 IM |
650 | "number of seconds to delay between refreshes"), |
651 | OPT_BOOLEAN('D', "dump-symtab", &dump_symtab, | |
652 | "dump the symbol table used for profiling"), | |
653 | OPT_INTEGER('f', "--count-filter", &count_filter, | |
654 | "only display functions with more events than this"), | |
655 | OPT_BOOLEAN('g', "group", &group, | |
656 | "put the counters into a counter group"), | |
657 | OPT_STRING('s', "sym-filter", &sym_filter, "pattern", | |
658 | "only display symbols matchig this pattern"), | |
659 | OPT_BOOLEAN('z', "zero", &group, | |
660 | "zero history across updates"), | |
661 | OPT_BOOLEAN('M', "use-mmap", &use_mmap, | |
662 | "track mmap events"), | |
663 | OPT_BOOLEAN('U', "use-munmap", &use_munmap, | |
664 | "track munmap events"), | |
665 | OPT_INTEGER('F', "--freq", &freq, | |
666 | "profile at this frequency"), | |
667 | OPT_END() | |
668 | }; | |
669 | ||
670 | int cmd_top(int argc, const char **argv, const char *prefix) | |
671 | { | |
672 | int counter; | |
673 | ||
674 | page_size = sysconf(_SC_PAGE_SIZE); | |
675 | ||
676 | create_events_help(events_help_msg); | |
677 | memcpy(event_id, default_event_id, sizeof(default_event_id)); | |
678 | ||
679 | argc = parse_options(argc, argv, options, top_usage, 0); | |
680 | if (argc) | |
681 | usage_with_options(top_usage, options); | |
682 | ||
683 | if (freq) { | |
684 | default_interval = freq; | |
685 | freq = 1; | |
686 | } | |
687 | ||
688 | /* CPU and PID are mutually exclusive */ | |
689 | if (target_pid != -1 && profile_cpu != -1) { | |
690 | printf("WARNING: PID switch overriding CPU\n"); | |
691 | sleep(1); | |
692 | profile_cpu = -1; | |
693 | } | |
694 | ||
695 | if (!nr_counters) { | |
696 | nr_counters = 1; | |
697 | event_id[0] = 0; | |
698 | } | |
699 | ||
700 | for (counter = 0; counter < nr_counters; counter++) { | |
701 | if (event_count[counter]) | |
702 | continue; | |
703 | ||
704 | event_count[counter] = default_interval; | |
705 | } | |
706 | ||
707 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); | |
708 | assert(nr_cpus <= MAX_NR_CPUS); | |
709 | assert(nr_cpus >= 0); | |
710 | ||
711 | if (target_pid != -1 || profile_cpu != -1) | |
712 | nr_cpus = 1; | |
713 | ||
714 | parse_symbols(); | |
715 | ||
716 | return __cmd_top(); | |
717 | } |