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Commit | Line | Data |
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a43783ae | 1 | #include <errno.h> |
fd20e811 | 2 | #include <inttypes.h> |
9b5e350c HM |
3 | #include "builtin.h" |
4 | #include "perf.h" | |
5 | ||
746f16ec | 6 | #include "util/evlist.h" |
fcf65bf1 | 7 | #include "util/evsel.h" |
9b5e350c HM |
8 | #include "util/util.h" |
9 | #include "util/cache.h" | |
10 | #include "util/symbol.h" | |
11 | #include "util/thread.h" | |
12 | #include "util/header.h" | |
13 | ||
4b6ab94e | 14 | #include <subcmd/parse-options.h> |
9b5e350c HM |
15 | #include "util/trace-event.h" |
16 | ||
17 | #include "util/debug.h" | |
18 | #include "util/session.h" | |
45694aa7 | 19 | #include "util/tool.h" |
f5fc1412 | 20 | #include "util/data.h" |
9b5e350c HM |
21 | |
22 | #include <sys/types.h> | |
23 | #include <sys/prctl.h> | |
24 | #include <semaphore.h> | |
25 | #include <pthread.h> | |
26 | #include <math.h> | |
27 | #include <limits.h> | |
28 | ||
29 | #include <linux/list.h> | |
30 | #include <linux/hash.h> | |
877a7a11 | 31 | #include <linux/kernel.h> |
9b5e350c | 32 | |
e4cef1f6 HM |
33 | static struct perf_session *session; |
34 | ||
9b5e350c HM |
35 | /* based on kernel/lockdep.c */ |
36 | #define LOCKHASH_BITS 12 | |
37 | #define LOCKHASH_SIZE (1UL << LOCKHASH_BITS) | |
38 | ||
39 | static struct list_head lockhash_table[LOCKHASH_SIZE]; | |
40 | ||
41 | #define __lockhashfn(key) hash_long((unsigned long)key, LOCKHASH_BITS) | |
42 | #define lockhashentry(key) (lockhash_table + __lockhashfn((key))) | |
43 | ||
9b5e350c | 44 | struct lock_stat { |
59f411b6 IM |
45 | struct list_head hash_entry; |
46 | struct rb_node rb; /* used for sorting */ | |
9b5e350c | 47 | |
59f411b6 | 48 | /* |
746f16ec | 49 | * FIXME: perf_evsel__intval() returns u64, |
9b5e350c | 50 | * so address of lockdep_map should be dealed as 64bit. |
59f411b6 IM |
51 | * Is there more better solution? |
52 | */ | |
53 | void *addr; /* address of lockdep_map, used as ID */ | |
54 | char *name; /* for strcpy(), we cannot use const */ | |
9b5e350c | 55 | |
59f411b6 | 56 | unsigned int nr_acquire; |
e4cef1f6 | 57 | unsigned int nr_acquired; |
59f411b6 IM |
58 | unsigned int nr_contended; |
59 | unsigned int nr_release; | |
9b5e350c | 60 | |
e4cef1f6 HM |
61 | unsigned int nr_readlock; |
62 | unsigned int nr_trylock; | |
f37376cd | 63 | |
9b5e350c | 64 | /* these times are in nano sec. */ |
f37376cd | 65 | u64 avg_wait_time; |
59f411b6 IM |
66 | u64 wait_time_total; |
67 | u64 wait_time_min; | |
68 | u64 wait_time_max; | |
e4cef1f6 HM |
69 | |
70 | int discard; /* flag of blacklist */ | |
71 | }; | |
72 | ||
73 | /* | |
74 | * States of lock_seq_stat | |
75 | * | |
76 | * UNINITIALIZED is required for detecting first event of acquire. | |
77 | * As the nature of lock events, there is no guarantee | |
78 | * that the first event for the locks are acquire, | |
79 | * it can be acquired, contended or release. | |
80 | */ | |
81 | #define SEQ_STATE_UNINITIALIZED 0 /* initial state */ | |
82 | #define SEQ_STATE_RELEASED 1 | |
83 | #define SEQ_STATE_ACQUIRING 2 | |
84 | #define SEQ_STATE_ACQUIRED 3 | |
85 | #define SEQ_STATE_READ_ACQUIRED 4 | |
86 | #define SEQ_STATE_CONTENDED 5 | |
87 | ||
88 | /* | |
89 | * MAX_LOCK_DEPTH | |
90 | * Imported from include/linux/sched.h. | |
91 | * Should this be synchronized? | |
92 | */ | |
93 | #define MAX_LOCK_DEPTH 48 | |
94 | ||
95 | /* | |
96 | * struct lock_seq_stat: | |
97 | * Place to put on state of one lock sequence | |
98 | * 1) acquire -> acquired -> release | |
99 | * 2) acquire -> contended -> acquired -> release | |
100 | * 3) acquire (with read or try) -> release | |
101 | * 4) Are there other patterns? | |
102 | */ | |
103 | struct lock_seq_stat { | |
104 | struct list_head list; | |
105 | int state; | |
106 | u64 prev_event_time; | |
107 | void *addr; | |
108 | ||
109 | int read_count; | |
9b5e350c HM |
110 | }; |
111 | ||
e4cef1f6 HM |
112 | struct thread_stat { |
113 | struct rb_node rb; | |
114 | ||
115 | u32 tid; | |
116 | struct list_head seq_list; | |
117 | }; | |
118 | ||
119 | static struct rb_root thread_stats; | |
120 | ||
121 | static struct thread_stat *thread_stat_find(u32 tid) | |
122 | { | |
123 | struct rb_node *node; | |
124 | struct thread_stat *st; | |
125 | ||
126 | node = thread_stats.rb_node; | |
127 | while (node) { | |
128 | st = container_of(node, struct thread_stat, rb); | |
129 | if (st->tid == tid) | |
130 | return st; | |
131 | else if (tid < st->tid) | |
132 | node = node->rb_left; | |
133 | else | |
134 | node = node->rb_right; | |
135 | } | |
136 | ||
137 | return NULL; | |
138 | } | |
139 | ||
140 | static void thread_stat_insert(struct thread_stat *new) | |
141 | { | |
142 | struct rb_node **rb = &thread_stats.rb_node; | |
143 | struct rb_node *parent = NULL; | |
144 | struct thread_stat *p; | |
145 | ||
146 | while (*rb) { | |
147 | p = container_of(*rb, struct thread_stat, rb); | |
148 | parent = *rb; | |
149 | ||
150 | if (new->tid < p->tid) | |
151 | rb = &(*rb)->rb_left; | |
152 | else if (new->tid > p->tid) | |
153 | rb = &(*rb)->rb_right; | |
154 | else | |
155 | BUG_ON("inserting invalid thread_stat\n"); | |
156 | } | |
157 | ||
158 | rb_link_node(&new->rb, parent, rb); | |
159 | rb_insert_color(&new->rb, &thread_stats); | |
160 | } | |
161 | ||
162 | static struct thread_stat *thread_stat_findnew_after_first(u32 tid) | |
163 | { | |
164 | struct thread_stat *st; | |
165 | ||
166 | st = thread_stat_find(tid); | |
167 | if (st) | |
168 | return st; | |
169 | ||
170 | st = zalloc(sizeof(struct thread_stat)); | |
33d6aef5 DA |
171 | if (!st) { |
172 | pr_err("memory allocation failed\n"); | |
173 | return NULL; | |
174 | } | |
e4cef1f6 HM |
175 | |
176 | st->tid = tid; | |
177 | INIT_LIST_HEAD(&st->seq_list); | |
178 | ||
179 | thread_stat_insert(st); | |
180 | ||
181 | return st; | |
182 | } | |
183 | ||
184 | static struct thread_stat *thread_stat_findnew_first(u32 tid); | |
185 | static struct thread_stat *(*thread_stat_findnew)(u32 tid) = | |
186 | thread_stat_findnew_first; | |
187 | ||
188 | static struct thread_stat *thread_stat_findnew_first(u32 tid) | |
189 | { | |
190 | struct thread_stat *st; | |
191 | ||
192 | st = zalloc(sizeof(struct thread_stat)); | |
33d6aef5 DA |
193 | if (!st) { |
194 | pr_err("memory allocation failed\n"); | |
195 | return NULL; | |
196 | } | |
e4cef1f6 HM |
197 | st->tid = tid; |
198 | INIT_LIST_HEAD(&st->seq_list); | |
199 | ||
200 | rb_link_node(&st->rb, NULL, &thread_stats.rb_node); | |
201 | rb_insert_color(&st->rb, &thread_stats); | |
202 | ||
203 | thread_stat_findnew = thread_stat_findnew_after_first; | |
204 | return st; | |
205 | } | |
206 | ||
9b5e350c | 207 | /* build simple key function one is bigger than two */ |
59f411b6 | 208 | #define SINGLE_KEY(member) \ |
9b5e350c HM |
209 | static int lock_stat_key_ ## member(struct lock_stat *one, \ |
210 | struct lock_stat *two) \ | |
211 | { \ | |
212 | return one->member > two->member; \ | |
213 | } | |
214 | ||
215 | SINGLE_KEY(nr_acquired) | |
216 | SINGLE_KEY(nr_contended) | |
f37376cd | 217 | SINGLE_KEY(avg_wait_time) |
9b5e350c | 218 | SINGLE_KEY(wait_time_total) |
9b5e350c HM |
219 | SINGLE_KEY(wait_time_max) |
220 | ||
9df03abe MS |
221 | static int lock_stat_key_wait_time_min(struct lock_stat *one, |
222 | struct lock_stat *two) | |
223 | { | |
224 | u64 s1 = one->wait_time_min; | |
225 | u64 s2 = two->wait_time_min; | |
226 | if (s1 == ULLONG_MAX) | |
227 | s1 = 0; | |
228 | if (s2 == ULLONG_MAX) | |
229 | s2 = 0; | |
230 | return s1 > s2; | |
231 | } | |
232 | ||
9b5e350c HM |
233 | struct lock_key { |
234 | /* | |
235 | * name: the value for specify by user | |
236 | * this should be simpler than raw name of member | |
237 | * e.g. nr_acquired -> acquired, wait_time_total -> wait_total | |
238 | */ | |
59f411b6 IM |
239 | const char *name; |
240 | int (*key)(struct lock_stat*, struct lock_stat*); | |
9b5e350c HM |
241 | }; |
242 | ||
59f411b6 IM |
243 | static const char *sort_key = "acquired"; |
244 | ||
245 | static int (*compare)(struct lock_stat *, struct lock_stat *); | |
246 | ||
247 | static struct rb_root result; /* place to store sorted data */ | |
9b5e350c HM |
248 | |
249 | #define DEF_KEY_LOCK(name, fn_suffix) \ | |
250 | { #name, lock_stat_key_ ## fn_suffix } | |
251 | struct lock_key keys[] = { | |
252 | DEF_KEY_LOCK(acquired, nr_acquired), | |
253 | DEF_KEY_LOCK(contended, nr_contended), | |
f37376cd | 254 | DEF_KEY_LOCK(avg_wait, avg_wait_time), |
9b5e350c HM |
255 | DEF_KEY_LOCK(wait_total, wait_time_total), |
256 | DEF_KEY_LOCK(wait_min, wait_time_min), | |
257 | DEF_KEY_LOCK(wait_max, wait_time_max), | |
258 | ||
259 | /* extra comparisons much complicated should be here */ | |
260 | ||
261 | { NULL, NULL } | |
262 | }; | |
263 | ||
33d6aef5 | 264 | static int select_key(void) |
9b5e350c HM |
265 | { |
266 | int i; | |
267 | ||
268 | for (i = 0; keys[i].name; i++) { | |
269 | if (!strcmp(keys[i].name, sort_key)) { | |
270 | compare = keys[i].key; | |
33d6aef5 | 271 | return 0; |
9b5e350c HM |
272 | } |
273 | } | |
274 | ||
33d6aef5 DA |
275 | pr_err("Unknown compare key: %s\n", sort_key); |
276 | ||
277 | return -1; | |
9b5e350c HM |
278 | } |
279 | ||
9b5e350c | 280 | static void insert_to_result(struct lock_stat *st, |
59f411b6 | 281 | int (*bigger)(struct lock_stat *, struct lock_stat *)) |
9b5e350c HM |
282 | { |
283 | struct rb_node **rb = &result.rb_node; | |
284 | struct rb_node *parent = NULL; | |
285 | struct lock_stat *p; | |
286 | ||
287 | while (*rb) { | |
288 | p = container_of(*rb, struct lock_stat, rb); | |
289 | parent = *rb; | |
290 | ||
291 | if (bigger(st, p)) | |
292 | rb = &(*rb)->rb_left; | |
293 | else | |
294 | rb = &(*rb)->rb_right; | |
295 | } | |
296 | ||
297 | rb_link_node(&st->rb, parent, rb); | |
298 | rb_insert_color(&st->rb, &result); | |
299 | } | |
300 | ||
301 | /* returns left most element of result, and erase it */ | |
302 | static struct lock_stat *pop_from_result(void) | |
303 | { | |
304 | struct rb_node *node = result.rb_node; | |
305 | ||
306 | if (!node) | |
307 | return NULL; | |
308 | ||
309 | while (node->rb_left) | |
310 | node = node->rb_left; | |
311 | ||
312 | rb_erase(node, &result); | |
313 | return container_of(node, struct lock_stat, rb); | |
314 | } | |
315 | ||
59f411b6 | 316 | static struct lock_stat *lock_stat_findnew(void *addr, const char *name) |
9b5e350c HM |
317 | { |
318 | struct list_head *entry = lockhashentry(addr); | |
319 | struct lock_stat *ret, *new; | |
320 | ||
321 | list_for_each_entry(ret, entry, hash_entry) { | |
322 | if (ret->addr == addr) | |
323 | return ret; | |
324 | } | |
325 | ||
326 | new = zalloc(sizeof(struct lock_stat)); | |
327 | if (!new) | |
328 | goto alloc_failed; | |
329 | ||
330 | new->addr = addr; | |
331 | new->name = zalloc(sizeof(char) * strlen(name) + 1); | |
0a98c7fe DB |
332 | if (!new->name) { |
333 | free(new); | |
9b5e350c | 334 | goto alloc_failed; |
0a98c7fe | 335 | } |
9b5e350c | 336 | |
0a98c7fe | 337 | strcpy(new->name, name); |
9b5e350c HM |
338 | new->wait_time_min = ULLONG_MAX; |
339 | ||
340 | list_add(&new->hash_entry, entry); | |
341 | return new; | |
342 | ||
343 | alloc_failed: | |
33d6aef5 DA |
344 | pr_err("memory allocation failed\n"); |
345 | return NULL; | |
9b5e350c HM |
346 | } |
347 | ||
9b5e350c | 348 | struct trace_lock_handler { |
746f16ec ACM |
349 | int (*acquire_event)(struct perf_evsel *evsel, |
350 | struct perf_sample *sample); | |
9b5e350c | 351 | |
746f16ec ACM |
352 | int (*acquired_event)(struct perf_evsel *evsel, |
353 | struct perf_sample *sample); | |
9b5e350c | 354 | |
746f16ec ACM |
355 | int (*contended_event)(struct perf_evsel *evsel, |
356 | struct perf_sample *sample); | |
9b5e350c | 357 | |
746f16ec ACM |
358 | int (*release_event)(struct perf_evsel *evsel, |
359 | struct perf_sample *sample); | |
9b5e350c HM |
360 | }; |
361 | ||
e4cef1f6 HM |
362 | static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr) |
363 | { | |
364 | struct lock_seq_stat *seq; | |
365 | ||
366 | list_for_each_entry(seq, &ts->seq_list, list) { | |
367 | if (seq->addr == addr) | |
368 | return seq; | |
369 | } | |
370 | ||
371 | seq = zalloc(sizeof(struct lock_seq_stat)); | |
33d6aef5 DA |
372 | if (!seq) { |
373 | pr_err("memory allocation failed\n"); | |
374 | return NULL; | |
375 | } | |
e4cef1f6 HM |
376 | seq->state = SEQ_STATE_UNINITIALIZED; |
377 | seq->addr = addr; | |
378 | ||
379 | list_add(&seq->list, &ts->seq_list); | |
380 | return seq; | |
381 | } | |
382 | ||
10350ec3 FW |
383 | enum broken_state { |
384 | BROKEN_ACQUIRE, | |
385 | BROKEN_ACQUIRED, | |
386 | BROKEN_CONTENDED, | |
387 | BROKEN_RELEASE, | |
388 | BROKEN_MAX, | |
389 | }; | |
390 | ||
391 | static int bad_hist[BROKEN_MAX]; | |
e4cef1f6 | 392 | |
84c7a217 FW |
393 | enum acquire_flags { |
394 | TRY_LOCK = 1, | |
395 | READ_LOCK = 2, | |
396 | }; | |
397 | ||
746f16ec ACM |
398 | static int report_lock_acquire_event(struct perf_evsel *evsel, |
399 | struct perf_sample *sample) | |
9b5e350c | 400 | { |
746f16ec | 401 | void *addr; |
e4cef1f6 HM |
402 | struct lock_stat *ls; |
403 | struct thread_stat *ts; | |
404 | struct lock_seq_stat *seq; | |
746f16ec ACM |
405 | const char *name = perf_evsel__strval(evsel, sample, "name"); |
406 | u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); | |
407 | int flag = perf_evsel__intval(evsel, sample, "flag"); | |
e4cef1f6 | 408 | |
746f16ec ACM |
409 | memcpy(&addr, &tmp, sizeof(void *)); |
410 | ||
411 | ls = lock_stat_findnew(addr, name); | |
33d6aef5 | 412 | if (!ls) |
b33492ad | 413 | return -ENOMEM; |
e4cef1f6 | 414 | if (ls->discard) |
33d6aef5 | 415 | return 0; |
9b5e350c | 416 | |
01d95524 | 417 | ts = thread_stat_findnew(sample->tid); |
33d6aef5 | 418 | if (!ts) |
b33492ad | 419 | return -ENOMEM; |
33d6aef5 | 420 | |
746f16ec | 421 | seq = get_seq(ts, addr); |
33d6aef5 | 422 | if (!seq) |
b33492ad | 423 | return -ENOMEM; |
9b5e350c | 424 | |
e4cef1f6 HM |
425 | switch (seq->state) { |
426 | case SEQ_STATE_UNINITIALIZED: | |
427 | case SEQ_STATE_RELEASED: | |
746f16ec | 428 | if (!flag) { |
e4cef1f6 HM |
429 | seq->state = SEQ_STATE_ACQUIRING; |
430 | } else { | |
746f16ec | 431 | if (flag & TRY_LOCK) |
e4cef1f6 | 432 | ls->nr_trylock++; |
746f16ec | 433 | if (flag & READ_LOCK) |
e4cef1f6 HM |
434 | ls->nr_readlock++; |
435 | seq->state = SEQ_STATE_READ_ACQUIRED; | |
436 | seq->read_count = 1; | |
437 | ls->nr_acquired++; | |
438 | } | |
439 | break; | |
440 | case SEQ_STATE_READ_ACQUIRED: | |
746f16ec | 441 | if (flag & READ_LOCK) { |
e4cef1f6 HM |
442 | seq->read_count++; |
443 | ls->nr_acquired++; | |
444 | goto end; | |
445 | } else { | |
446 | goto broken; | |
447 | } | |
9b5e350c | 448 | break; |
e4cef1f6 HM |
449 | case SEQ_STATE_ACQUIRED: |
450 | case SEQ_STATE_ACQUIRING: | |
451 | case SEQ_STATE_CONTENDED: | |
452 | broken: | |
453 | /* broken lock sequence, discard it */ | |
454 | ls->discard = 1; | |
10350ec3 | 455 | bad_hist[BROKEN_ACQUIRE]++; |
e4cef1f6 HM |
456 | list_del(&seq->list); |
457 | free(seq); | |
458 | goto end; | |
9b5e350c | 459 | default: |
e4cef1f6 | 460 | BUG_ON("Unknown state of lock sequence found!\n"); |
9b5e350c HM |
461 | break; |
462 | } | |
463 | ||
e4cef1f6 | 464 | ls->nr_acquire++; |
01d95524 | 465 | seq->prev_event_time = sample->time; |
e4cef1f6 | 466 | end: |
33d6aef5 | 467 | return 0; |
9b5e350c HM |
468 | } |
469 | ||
746f16ec ACM |
470 | static int report_lock_acquired_event(struct perf_evsel *evsel, |
471 | struct perf_sample *sample) | |
9b5e350c | 472 | { |
746f16ec | 473 | void *addr; |
e4cef1f6 HM |
474 | struct lock_stat *ls; |
475 | struct thread_stat *ts; | |
476 | struct lock_seq_stat *seq; | |
477 | u64 contended_term; | |
746f16ec ACM |
478 | const char *name = perf_evsel__strval(evsel, sample, "name"); |
479 | u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); | |
480 | ||
481 | memcpy(&addr, &tmp, sizeof(void *)); | |
9b5e350c | 482 | |
746f16ec | 483 | ls = lock_stat_findnew(addr, name); |
33d6aef5 | 484 | if (!ls) |
b33492ad | 485 | return -ENOMEM; |
e4cef1f6 | 486 | if (ls->discard) |
33d6aef5 | 487 | return 0; |
e4cef1f6 | 488 | |
01d95524 | 489 | ts = thread_stat_findnew(sample->tid); |
33d6aef5 | 490 | if (!ts) |
b33492ad | 491 | return -ENOMEM; |
33d6aef5 | 492 | |
746f16ec | 493 | seq = get_seq(ts, addr); |
33d6aef5 | 494 | if (!seq) |
b33492ad | 495 | return -ENOMEM; |
9b5e350c | 496 | |
e4cef1f6 HM |
497 | switch (seq->state) { |
498 | case SEQ_STATE_UNINITIALIZED: | |
499 | /* orphan event, do nothing */ | |
33d6aef5 | 500 | return 0; |
e4cef1f6 | 501 | case SEQ_STATE_ACQUIRING: |
9b5e350c | 502 | break; |
e4cef1f6 | 503 | case SEQ_STATE_CONTENDED: |
746f16ec | 504 | contended_term = sample->time - seq->prev_event_time; |
e4cef1f6 | 505 | ls->wait_time_total += contended_term; |
e4cef1f6 HM |
506 | if (contended_term < ls->wait_time_min) |
507 | ls->wait_time_min = contended_term; | |
90c0e5fc | 508 | if (ls->wait_time_max < contended_term) |
e4cef1f6 | 509 | ls->wait_time_max = contended_term; |
9b5e350c | 510 | break; |
e4cef1f6 HM |
511 | case SEQ_STATE_RELEASED: |
512 | case SEQ_STATE_ACQUIRED: | |
513 | case SEQ_STATE_READ_ACQUIRED: | |
514 | /* broken lock sequence, discard it */ | |
515 | ls->discard = 1; | |
10350ec3 | 516 | bad_hist[BROKEN_ACQUIRED]++; |
e4cef1f6 HM |
517 | list_del(&seq->list); |
518 | free(seq); | |
519 | goto end; | |
9b5e350c | 520 | default: |
e4cef1f6 | 521 | BUG_ON("Unknown state of lock sequence found!\n"); |
9b5e350c HM |
522 | break; |
523 | } | |
524 | ||
e4cef1f6 HM |
525 | seq->state = SEQ_STATE_ACQUIRED; |
526 | ls->nr_acquired++; | |
f37376cd | 527 | ls->avg_wait_time = ls->nr_contended ? ls->wait_time_total/ls->nr_contended : 0; |
746f16ec | 528 | seq->prev_event_time = sample->time; |
e4cef1f6 | 529 | end: |
33d6aef5 | 530 | return 0; |
9b5e350c HM |
531 | } |
532 | ||
746f16ec ACM |
533 | static int report_lock_contended_event(struct perf_evsel *evsel, |
534 | struct perf_sample *sample) | |
9b5e350c | 535 | { |
746f16ec | 536 | void *addr; |
e4cef1f6 HM |
537 | struct lock_stat *ls; |
538 | struct thread_stat *ts; | |
539 | struct lock_seq_stat *seq; | |
746f16ec ACM |
540 | const char *name = perf_evsel__strval(evsel, sample, "name"); |
541 | u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); | |
542 | ||
543 | memcpy(&addr, &tmp, sizeof(void *)); | |
e4cef1f6 | 544 | |
746f16ec | 545 | ls = lock_stat_findnew(addr, name); |
33d6aef5 | 546 | if (!ls) |
b33492ad | 547 | return -ENOMEM; |
e4cef1f6 | 548 | if (ls->discard) |
33d6aef5 | 549 | return 0; |
9b5e350c | 550 | |
01d95524 | 551 | ts = thread_stat_findnew(sample->tid); |
33d6aef5 | 552 | if (!ts) |
b33492ad | 553 | return -ENOMEM; |
33d6aef5 | 554 | |
746f16ec | 555 | seq = get_seq(ts, addr); |
33d6aef5 | 556 | if (!seq) |
b33492ad | 557 | return -ENOMEM; |
9b5e350c | 558 | |
e4cef1f6 HM |
559 | switch (seq->state) { |
560 | case SEQ_STATE_UNINITIALIZED: | |
561 | /* orphan event, do nothing */ | |
33d6aef5 | 562 | return 0; |
e4cef1f6 | 563 | case SEQ_STATE_ACQUIRING: |
9b5e350c | 564 | break; |
e4cef1f6 HM |
565 | case SEQ_STATE_RELEASED: |
566 | case SEQ_STATE_ACQUIRED: | |
567 | case SEQ_STATE_READ_ACQUIRED: | |
568 | case SEQ_STATE_CONTENDED: | |
569 | /* broken lock sequence, discard it */ | |
570 | ls->discard = 1; | |
10350ec3 | 571 | bad_hist[BROKEN_CONTENDED]++; |
e4cef1f6 HM |
572 | list_del(&seq->list); |
573 | free(seq); | |
574 | goto end; | |
9b5e350c | 575 | default: |
e4cef1f6 | 576 | BUG_ON("Unknown state of lock sequence found!\n"); |
9b5e350c HM |
577 | break; |
578 | } | |
579 | ||
e4cef1f6 HM |
580 | seq->state = SEQ_STATE_CONTENDED; |
581 | ls->nr_contended++; | |
f37376cd | 582 | ls->avg_wait_time = ls->wait_time_total/ls->nr_contended; |
01d95524 | 583 | seq->prev_event_time = sample->time; |
e4cef1f6 | 584 | end: |
33d6aef5 | 585 | return 0; |
9b5e350c HM |
586 | } |
587 | ||
746f16ec ACM |
588 | static int report_lock_release_event(struct perf_evsel *evsel, |
589 | struct perf_sample *sample) | |
9b5e350c | 590 | { |
746f16ec | 591 | void *addr; |
e4cef1f6 HM |
592 | struct lock_stat *ls; |
593 | struct thread_stat *ts; | |
594 | struct lock_seq_stat *seq; | |
746f16ec ACM |
595 | const char *name = perf_evsel__strval(evsel, sample, "name"); |
596 | u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); | |
9b5e350c | 597 | |
746f16ec ACM |
598 | memcpy(&addr, &tmp, sizeof(void *)); |
599 | ||
600 | ls = lock_stat_findnew(addr, name); | |
33d6aef5 | 601 | if (!ls) |
b33492ad | 602 | return -ENOMEM; |
e4cef1f6 | 603 | if (ls->discard) |
33d6aef5 | 604 | return 0; |
9b5e350c | 605 | |
01d95524 | 606 | ts = thread_stat_findnew(sample->tid); |
33d6aef5 | 607 | if (!ts) |
b33492ad | 608 | return -ENOMEM; |
33d6aef5 | 609 | |
746f16ec | 610 | seq = get_seq(ts, addr); |
33d6aef5 | 611 | if (!seq) |
b33492ad | 612 | return -ENOMEM; |
9b5e350c | 613 | |
e4cef1f6 HM |
614 | switch (seq->state) { |
615 | case SEQ_STATE_UNINITIALIZED: | |
616 | goto end; | |
e4cef1f6 HM |
617 | case SEQ_STATE_ACQUIRED: |
618 | break; | |
619 | case SEQ_STATE_READ_ACQUIRED: | |
620 | seq->read_count--; | |
621 | BUG_ON(seq->read_count < 0); | |
622 | if (!seq->read_count) { | |
623 | ls->nr_release++; | |
9b5e350c HM |
624 | goto end; |
625 | } | |
e4cef1f6 HM |
626 | break; |
627 | case SEQ_STATE_ACQUIRING: | |
628 | case SEQ_STATE_CONTENDED: | |
629 | case SEQ_STATE_RELEASED: | |
630 | /* broken lock sequence, discard it */ | |
631 | ls->discard = 1; | |
10350ec3 | 632 | bad_hist[BROKEN_RELEASE]++; |
e4cef1f6 | 633 | goto free_seq; |
9b5e350c | 634 | default: |
e4cef1f6 | 635 | BUG_ON("Unknown state of lock sequence found!\n"); |
9b5e350c HM |
636 | break; |
637 | } | |
638 | ||
e4cef1f6 HM |
639 | ls->nr_release++; |
640 | free_seq: | |
641 | list_del(&seq->list); | |
642 | free(seq); | |
9b5e350c | 643 | end: |
33d6aef5 | 644 | return 0; |
9b5e350c HM |
645 | } |
646 | ||
647 | /* lock oriented handlers */ | |
648 | /* TODO: handlers for CPU oriented, thread oriented */ | |
59f411b6 IM |
649 | static struct trace_lock_handler report_lock_ops = { |
650 | .acquire_event = report_lock_acquire_event, | |
651 | .acquired_event = report_lock_acquired_event, | |
652 | .contended_event = report_lock_contended_event, | |
653 | .release_event = report_lock_release_event, | |
9b5e350c HM |
654 | }; |
655 | ||
656 | static struct trace_lock_handler *trace_handler; | |
657 | ||
33d6aef5 | 658 | static int perf_evsel__process_lock_acquire(struct perf_evsel *evsel, |
01d95524 | 659 | struct perf_sample *sample) |
9b5e350c | 660 | { |
59f411b6 | 661 | if (trace_handler->acquire_event) |
746f16ec ACM |
662 | return trace_handler->acquire_event(evsel, sample); |
663 | return 0; | |
9b5e350c HM |
664 | } |
665 | ||
33d6aef5 | 666 | static int perf_evsel__process_lock_acquired(struct perf_evsel *evsel, |
01d95524 | 667 | struct perf_sample *sample) |
9b5e350c | 668 | { |
33d6aef5 | 669 | if (trace_handler->acquired_event) |
746f16ec ACM |
670 | return trace_handler->acquired_event(evsel, sample); |
671 | return 0; | |
9b5e350c HM |
672 | } |
673 | ||
33d6aef5 | 674 | static int perf_evsel__process_lock_contended(struct perf_evsel *evsel, |
746f16ec | 675 | struct perf_sample *sample) |
9b5e350c | 676 | { |
33d6aef5 | 677 | if (trace_handler->contended_event) |
746f16ec ACM |
678 | return trace_handler->contended_event(evsel, sample); |
679 | return 0; | |
9b5e350c HM |
680 | } |
681 | ||
33d6aef5 | 682 | static int perf_evsel__process_lock_release(struct perf_evsel *evsel, |
746f16ec | 683 | struct perf_sample *sample) |
9b5e350c | 684 | { |
33d6aef5 | 685 | if (trace_handler->release_event) |
746f16ec ACM |
686 | return trace_handler->release_event(evsel, sample); |
687 | return 0; | |
9b5e350c HM |
688 | } |
689 | ||
10350ec3 FW |
690 | static void print_bad_events(int bad, int total) |
691 | { | |
692 | /* Output for debug, this have to be removed */ | |
693 | int i; | |
694 | const char *name[4] = | |
695 | { "acquire", "acquired", "contended", "release" }; | |
696 | ||
697 | pr_info("\n=== output for debug===\n\n"); | |
5efe08cf | 698 | pr_info("bad: %d, total: %d\n", bad, total); |
60a25cbc | 699 | pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100); |
10350ec3 FW |
700 | pr_info("histogram of events caused bad sequence\n"); |
701 | for (i = 0; i < BROKEN_MAX; i++) | |
702 | pr_info(" %10s: %d\n", name[i], bad_hist[i]); | |
703 | } | |
704 | ||
9b5e350c HM |
705 | /* TODO: various way to print, coloring, nano or milli sec */ |
706 | static void print_result(void) | |
707 | { | |
708 | struct lock_stat *st; | |
709 | char cut_name[20]; | |
e4cef1f6 | 710 | int bad, total; |
9b5e350c | 711 | |
26242d85 HM |
712 | pr_info("%20s ", "Name"); |
713 | pr_info("%10s ", "acquired"); | |
714 | pr_info("%10s ", "contended"); | |
9b5e350c | 715 | |
f37376cd | 716 | pr_info("%15s ", "avg wait (ns)"); |
26242d85 HM |
717 | pr_info("%15s ", "total wait (ns)"); |
718 | pr_info("%15s ", "max wait (ns)"); | |
719 | pr_info("%15s ", "min wait (ns)"); | |
9b5e350c | 720 | |
26242d85 | 721 | pr_info("\n\n"); |
9b5e350c | 722 | |
e4cef1f6 | 723 | bad = total = 0; |
9b5e350c | 724 | while ((st = pop_from_result())) { |
e4cef1f6 HM |
725 | total++; |
726 | if (st->discard) { | |
727 | bad++; | |
728 | continue; | |
729 | } | |
9b5e350c HM |
730 | bzero(cut_name, 20); |
731 | ||
9b5e350c HM |
732 | if (strlen(st->name) < 16) { |
733 | /* output raw name */ | |
26242d85 | 734 | pr_info("%20s ", st->name); |
9b5e350c HM |
735 | } else { |
736 | strncpy(cut_name, st->name, 16); | |
737 | cut_name[16] = '.'; | |
738 | cut_name[17] = '.'; | |
739 | cut_name[18] = '.'; | |
740 | cut_name[19] = '\0'; | |
741 | /* cut off name for saving output style */ | |
26242d85 | 742 | pr_info("%20s ", cut_name); |
9b5e350c HM |
743 | } |
744 | ||
26242d85 HM |
745 | pr_info("%10u ", st->nr_acquired); |
746 | pr_info("%10u ", st->nr_contended); | |
9b5e350c | 747 | |
f37376cd | 748 | pr_info("%15" PRIu64 " ", st->avg_wait_time); |
9486aa38 ACM |
749 | pr_info("%15" PRIu64 " ", st->wait_time_total); |
750 | pr_info("%15" PRIu64 " ", st->wait_time_max); | |
751 | pr_info("%15" PRIu64 " ", st->wait_time_min == ULLONG_MAX ? | |
9b5e350c | 752 | 0 : st->wait_time_min); |
26242d85 | 753 | pr_info("\n"); |
9b5e350c | 754 | } |
e4cef1f6 | 755 | |
10350ec3 | 756 | print_bad_events(bad, total); |
9b5e350c HM |
757 | } |
758 | ||
8035458f | 759 | static bool info_threads, info_map; |
26242d85 HM |
760 | |
761 | static void dump_threads(void) | |
762 | { | |
763 | struct thread_stat *st; | |
764 | struct rb_node *node; | |
765 | struct thread *t; | |
766 | ||
767 | pr_info("%10s: comm\n", "Thread ID"); | |
768 | ||
769 | node = rb_first(&thread_stats); | |
770 | while (node) { | |
771 | st = container_of(node, struct thread_stat, rb); | |
772 | t = perf_session__findnew(session, st->tid); | |
b9c5143a | 773 | pr_info("%10d: %s\n", st->tid, thread__comm_str(t)); |
26242d85 | 774 | node = rb_next(node); |
b91fc39f | 775 | thread__put(t); |
26242d85 HM |
776 | }; |
777 | } | |
778 | ||
9b5e350c HM |
779 | static void dump_map(void) |
780 | { | |
781 | unsigned int i; | |
782 | struct lock_stat *st; | |
783 | ||
26242d85 | 784 | pr_info("Address of instance: name of class\n"); |
9b5e350c HM |
785 | for (i = 0; i < LOCKHASH_SIZE; i++) { |
786 | list_for_each_entry(st, &lockhash_table[i], hash_entry) { | |
26242d85 | 787 | pr_info(" %p: %s\n", st->addr, st->name); |
9b5e350c HM |
788 | } |
789 | } | |
790 | } | |
791 | ||
33d6aef5 | 792 | static int dump_info(void) |
26242d85 | 793 | { |
33d6aef5 DA |
794 | int rc = 0; |
795 | ||
26242d85 HM |
796 | if (info_threads) |
797 | dump_threads(); | |
798 | else if (info_map) | |
799 | dump_map(); | |
33d6aef5 DA |
800 | else { |
801 | rc = -1; | |
802 | pr_err("Unknown type of information\n"); | |
803 | } | |
804 | ||
805 | return rc; | |
26242d85 HM |
806 | } |
807 | ||
746f16ec ACM |
808 | typedef int (*tracepoint_handler)(struct perf_evsel *evsel, |
809 | struct perf_sample *sample); | |
810 | ||
1d037ca1 | 811 | static int process_sample_event(struct perf_tool *tool __maybe_unused, |
d20deb64 | 812 | union perf_event *event, |
9e69c210 | 813 | struct perf_sample *sample, |
fcf65bf1 | 814 | struct perf_evsel *evsel, |
743eb868 | 815 | struct machine *machine) |
c61e52ee | 816 | { |
b91fc39f | 817 | int err = 0; |
314add6b AH |
818 | struct thread *thread = machine__findnew_thread(machine, sample->pid, |
819 | sample->tid); | |
c61e52ee | 820 | |
c61e52ee FW |
821 | if (thread == NULL) { |
822 | pr_debug("problem processing %d event, skipping it.\n", | |
8115d60c | 823 | event->header.type); |
c61e52ee FW |
824 | return -1; |
825 | } | |
826 | ||
744a9719 ACM |
827 | if (evsel->handler != NULL) { |
828 | tracepoint_handler f = evsel->handler; | |
b91fc39f | 829 | err = f(evsel, sample); |
746f16ec ACM |
830 | } |
831 | ||
b91fc39f ACM |
832 | thread__put(thread); |
833 | ||
834 | return err; | |
c61e52ee FW |
835 | } |
836 | ||
375eb2be DB |
837 | static void sort_result(void) |
838 | { | |
839 | unsigned int i; | |
840 | struct lock_stat *st; | |
841 | ||
842 | for (i = 0; i < LOCKHASH_SIZE; i++) { | |
843 | list_for_each_entry(st, &lockhash_table[i], hash_entry) { | |
844 | insert_to_result(st, compare); | |
845 | } | |
846 | } | |
847 | } | |
848 | ||
746f16ec ACM |
849 | static const struct perf_evsel_str_handler lock_tracepoints[] = { |
850 | { "lock:lock_acquire", perf_evsel__process_lock_acquire, }, /* CONFIG_LOCKDEP */ | |
851 | { "lock:lock_acquired", perf_evsel__process_lock_acquired, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */ | |
852 | { "lock:lock_contended", perf_evsel__process_lock_contended, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */ | |
853 | { "lock:lock_release", perf_evsel__process_lock_release, }, /* CONFIG_LOCKDEP */ | |
854 | }; | |
855 | ||
c4ac732a YS |
856 | static bool force; |
857 | ||
375eb2be | 858 | static int __cmd_report(bool display_info) |
9b5e350c | 859 | { |
375eb2be | 860 | int err = -EINVAL; |
c75d98af ACM |
861 | struct perf_tool eops = { |
862 | .sample = process_sample_event, | |
863 | .comm = perf_event__process_comm, | |
f3b3614a | 864 | .namespaces = perf_event__process_namespaces, |
0a8cb85c | 865 | .ordered_events = true, |
c75d98af | 866 | }; |
f5fc1412 JO |
867 | struct perf_data_file file = { |
868 | .path = input_name, | |
869 | .mode = PERF_DATA_MODE_READ, | |
c4ac732a | 870 | .force = force, |
f5fc1412 | 871 | }; |
375eb2be | 872 | |
f5fc1412 | 873 | session = perf_session__new(&file, false, &eops); |
33d6aef5 DA |
874 | if (!session) { |
875 | pr_err("Initializing perf session failed\n"); | |
52e02834 | 876 | return -1; |
33d6aef5 | 877 | } |
9b5e350c | 878 | |
0a7e6d1b | 879 | symbol__init(&session->header.env); |
6fd6c6b4 | 880 | |
375eb2be DB |
881 | if (!perf_session__has_traces(session, "lock record")) |
882 | goto out_delete; | |
883 | ||
746f16ec ACM |
884 | if (perf_session__set_tracepoints_handlers(session, lock_tracepoints)) { |
885 | pr_err("Initializing perf session tracepoint handlers failed\n"); | |
375eb2be | 886 | goto out_delete; |
746f16ec ACM |
887 | } |
888 | ||
375eb2be DB |
889 | if (select_key()) |
890 | goto out_delete; | |
9b5e350c | 891 | |
b7b61cbe | 892 | err = perf_session__process_events(session); |
375eb2be DB |
893 | if (err) |
894 | goto out_delete; | |
9b5e350c | 895 | |
9b5e350c | 896 | setup_pager(); |
375eb2be DB |
897 | if (display_info) /* used for info subcommand */ |
898 | err = dump_info(); | |
899 | else { | |
900 | sort_result(); | |
901 | print_result(); | |
902 | } | |
33d6aef5 | 903 | |
375eb2be DB |
904 | out_delete: |
905 | perf_session__delete(session); | |
906 | return err; | |
9b5e350c HM |
907 | } |
908 | ||
9b5e350c HM |
909 | static int __cmd_record(int argc, const char **argv) |
910 | { | |
c75d98af | 911 | const char *record_args[] = { |
4a4d371a | 912 | "record", "-R", "-m", "1024", "-c", "1", |
c75d98af | 913 | }; |
0a98c7fe | 914 | unsigned int rec_argc, i, j, ret; |
9b5e350c HM |
915 | const char **rec_argv; |
916 | ||
d25dcba8 | 917 | for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) { |
746f16ec | 918 | if (!is_valid_tracepoint(lock_tracepoints[i].name)) { |
d25dcba8 DA |
919 | pr_err("tracepoint %s is not enabled. " |
920 | "Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?\n", | |
746f16ec | 921 | lock_tracepoints[i].name); |
d25dcba8 DA |
922 | return 1; |
923 | } | |
924 | } | |
925 | ||
9b5e350c | 926 | rec_argc = ARRAY_SIZE(record_args) + argc - 1; |
d25dcba8 DA |
927 | /* factor of 2 is for -e in front of each tracepoint */ |
928 | rec_argc += 2 * ARRAY_SIZE(lock_tracepoints); | |
9b5e350c | 929 | |
d25dcba8 | 930 | rec_argv = calloc(rec_argc + 1, sizeof(char *)); |
0a98c7fe | 931 | if (!rec_argv) |
ce47dc56 CS |
932 | return -ENOMEM; |
933 | ||
9b5e350c HM |
934 | for (i = 0; i < ARRAY_SIZE(record_args); i++) |
935 | rec_argv[i] = strdup(record_args[i]); | |
936 | ||
d25dcba8 DA |
937 | for (j = 0; j < ARRAY_SIZE(lock_tracepoints); j++) { |
938 | rec_argv[i++] = "-e"; | |
746f16ec | 939 | rec_argv[i++] = strdup(lock_tracepoints[j].name); |
d25dcba8 DA |
940 | } |
941 | ||
9b5e350c HM |
942 | for (j = 1; j < (unsigned int)argc; j++, i++) |
943 | rec_argv[i] = argv[j]; | |
944 | ||
945 | BUG_ON(i != rec_argc); | |
946 | ||
b0ad8ea6 | 947 | ret = cmd_record(i, rec_argv); |
0a98c7fe DB |
948 | free(rec_argv); |
949 | return ret; | |
9b5e350c HM |
950 | } |
951 | ||
b0ad8ea6 | 952 | int cmd_lock(int argc, const char **argv) |
9b5e350c | 953 | { |
249eed53 CD |
954 | const struct option lock_options[] = { |
955 | OPT_STRING('i', "input", &input_name, "file", "input file name"), | |
956 | OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), | |
957 | OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), | |
b40e3612 | 958 | OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), |
249eed53 CD |
959 | OPT_END() |
960 | }; | |
961 | ||
c75d98af ACM |
962 | const struct option info_options[] = { |
963 | OPT_BOOLEAN('t', "threads", &info_threads, | |
964 | "dump thread list in perf.data"), | |
965 | OPT_BOOLEAN('m', "map", &info_map, | |
966 | "map of lock instances (address:name table)"), | |
249eed53 | 967 | OPT_PARENT(lock_options) |
c75d98af | 968 | }; |
249eed53 | 969 | |
c75d98af ACM |
970 | const struct option report_options[] = { |
971 | OPT_STRING('k', "key", &sort_key, "acquired", | |
f37376cd | 972 | "key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"), |
c75d98af | 973 | /* TODO: type */ |
249eed53 | 974 | OPT_PARENT(lock_options) |
c75d98af | 975 | }; |
249eed53 | 976 | |
c75d98af ACM |
977 | const char * const info_usage[] = { |
978 | "perf lock info [<options>]", | |
979 | NULL | |
980 | }; | |
a2368c31 RR |
981 | const char *const lock_subcommands[] = { "record", "report", "script", |
982 | "info", NULL }; | |
983 | const char *lock_usage[] = { | |
984 | NULL, | |
c75d98af ACM |
985 | NULL |
986 | }; | |
987 | const char * const report_usage[] = { | |
988 | "perf lock report [<options>]", | |
989 | NULL | |
990 | }; | |
9b5e350c | 991 | unsigned int i; |
33d6aef5 | 992 | int rc = 0; |
9b5e350c | 993 | |
9b5e350c HM |
994 | for (i = 0; i < LOCKHASH_SIZE; i++) |
995 | INIT_LIST_HEAD(lockhash_table + i); | |
996 | ||
a2368c31 RR |
997 | argc = parse_options_subcommand(argc, argv, lock_options, lock_subcommands, |
998 | lock_usage, PARSE_OPT_STOP_AT_NON_OPTION); | |
9b5e350c HM |
999 | if (!argc) |
1000 | usage_with_options(lock_usage, lock_options); | |
1001 | ||
1002 | if (!strncmp(argv[0], "rec", 3)) { | |
1003 | return __cmd_record(argc, argv); | |
59f411b6 IM |
1004 | } else if (!strncmp(argv[0], "report", 6)) { |
1005 | trace_handler = &report_lock_ops; | |
9b5e350c HM |
1006 | if (argc) { |
1007 | argc = parse_options(argc, argv, | |
59f411b6 | 1008 | report_options, report_usage, 0); |
9b5e350c | 1009 | if (argc) |
59f411b6 | 1010 | usage_with_options(report_usage, report_options); |
9b5e350c | 1011 | } |
375eb2be | 1012 | rc = __cmd_report(false); |
133dc4c3 IM |
1013 | } else if (!strcmp(argv[0], "script")) { |
1014 | /* Aliased to 'perf script' */ | |
b0ad8ea6 | 1015 | return cmd_script(argc, argv); |
26242d85 HM |
1016 | } else if (!strcmp(argv[0], "info")) { |
1017 | if (argc) { | |
1018 | argc = parse_options(argc, argv, | |
1019 | info_options, info_usage, 0); | |
1020 | if (argc) | |
1021 | usage_with_options(info_usage, info_options); | |
1022 | } | |
59f411b6 IM |
1023 | /* recycling report_lock_ops */ |
1024 | trace_handler = &report_lock_ops; | |
375eb2be | 1025 | rc = __cmd_report(true); |
9b5e350c HM |
1026 | } else { |
1027 | usage_with_options(lock_usage, lock_options); | |
1028 | } | |
1029 | ||
33d6aef5 | 1030 | return rc; |
9b5e350c | 1031 | } |