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Hitoshi Mitake9b5e3502010-01-30 20:43:33 +09001#include "builtin.h"
2#include "perf.h"
3
4#include "util/util.h"
5#include "util/cache.h"
6#include "util/symbol.h"
7#include "util/thread.h"
8#include "util/header.h"
9
10#include "util/parse-options.h"
11#include "util/trace-event.h"
12
13#include "util/debug.h"
14#include "util/session.h"
15
16#include <sys/types.h>
17#include <sys/prctl.h>
18#include <semaphore.h>
19#include <pthread.h>
20#include <math.h>
21#include <limits.h>
22
23#include <linux/list.h>
24#include <linux/hash.h>
25
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +090026static struct perf_session *session;
27
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090028/* based on kernel/lockdep.c */
29#define LOCKHASH_BITS 12
30#define LOCKHASH_SIZE (1UL << LOCKHASH_BITS)
31
32static struct list_head lockhash_table[LOCKHASH_SIZE];
33
34#define __lockhashfn(key) hash_long((unsigned long)key, LOCKHASH_BITS)
35#define lockhashentry(key) (lockhash_table + __lockhashfn((key)))
36
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090037struct lock_stat {
Ingo Molnar59f411b2010-01-31 08:27:58 +010038 struct list_head hash_entry;
39 struct rb_node rb; /* used for sorting */
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090040
Ingo Molnar59f411b2010-01-31 08:27:58 +010041 /*
42 * FIXME: raw_field_value() returns unsigned long long,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090043 * so address of lockdep_map should be dealed as 64bit.
Ingo Molnar59f411b2010-01-31 08:27:58 +010044 * Is there more better solution?
45 */
46 void *addr; /* address of lockdep_map, used as ID */
47 char *name; /* for strcpy(), we cannot use const */
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090048
Ingo Molnar59f411b2010-01-31 08:27:58 +010049 unsigned int nr_acquire;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +090050 unsigned int nr_acquired;
Ingo Molnar59f411b2010-01-31 08:27:58 +010051 unsigned int nr_contended;
52 unsigned int nr_release;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090053
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +090054 unsigned int nr_readlock;
55 unsigned int nr_trylock;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090056 /* these times are in nano sec. */
Ingo Molnar59f411b2010-01-31 08:27:58 +010057 u64 wait_time_total;
58 u64 wait_time_min;
59 u64 wait_time_max;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +090060
61 int discard; /* flag of blacklist */
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +090062};
63
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +090064/*
65 * States of lock_seq_stat
66 *
67 * UNINITIALIZED is required for detecting first event of acquire.
68 * As the nature of lock events, there is no guarantee
69 * that the first event for the locks are acquire,
70 * it can be acquired, contended or release.
71 */
72#define SEQ_STATE_UNINITIALIZED 0 /* initial state */
73#define SEQ_STATE_RELEASED 1
74#define SEQ_STATE_ACQUIRING 2
75#define SEQ_STATE_ACQUIRED 3
76#define SEQ_STATE_READ_ACQUIRED 4
77#define SEQ_STATE_CONTENDED 5
78
79/*
80 * MAX_LOCK_DEPTH
81 * Imported from include/linux/sched.h.
82 * Should this be synchronized?
83 */
84#define MAX_LOCK_DEPTH 48
85
86/*
87 * struct lock_seq_stat:
88 * Place to put on state of one lock sequence
89 * 1) acquire -> acquired -> release
90 * 2) acquire -> contended -> acquired -> release
91 * 3) acquire (with read or try) -> release
92 * 4) Are there other patterns?
93 */
94struct lock_seq_stat {
95 struct list_head list;
96 int state;
97 u64 prev_event_time;
98 void *addr;
99
100 int read_count;
101};
102
103struct thread_stat {
104 struct rb_node rb;
105
106 u32 tid;
107 struct list_head seq_list;
108};
109
110static struct rb_root thread_stats;
111
112static struct thread_stat *thread_stat_find(u32 tid)
113{
114 struct rb_node *node;
115 struct thread_stat *st;
116
117 node = thread_stats.rb_node;
118 while (node) {
119 st = container_of(node, struct thread_stat, rb);
120 if (st->tid == tid)
121 return st;
122 else if (tid < st->tid)
123 node = node->rb_left;
124 else
125 node = node->rb_right;
126 }
127
128 return NULL;
129}
130
131static void thread_stat_insert(struct thread_stat *new)
132{
133 struct rb_node **rb = &thread_stats.rb_node;
134 struct rb_node *parent = NULL;
135 struct thread_stat *p;
136
137 while (*rb) {
138 p = container_of(*rb, struct thread_stat, rb);
139 parent = *rb;
140
141 if (new->tid < p->tid)
142 rb = &(*rb)->rb_left;
143 else if (new->tid > p->tid)
144 rb = &(*rb)->rb_right;
145 else
146 BUG_ON("inserting invalid thread_stat\n");
147 }
148
149 rb_link_node(&new->rb, parent, rb);
150 rb_insert_color(&new->rb, &thread_stats);
151}
152
153static struct thread_stat *thread_stat_findnew_after_first(u32 tid)
154{
155 struct thread_stat *st;
156
157 st = thread_stat_find(tid);
158 if (st)
159 return st;
160
161 st = zalloc(sizeof(struct thread_stat));
162 if (!st)
163 die("memory allocation failed\n");
164
165 st->tid = tid;
166 INIT_LIST_HEAD(&st->seq_list);
167
168 thread_stat_insert(st);
169
170 return st;
171}
172
173static struct thread_stat *thread_stat_findnew_first(u32 tid);
174static struct thread_stat *(*thread_stat_findnew)(u32 tid) =
175 thread_stat_findnew_first;
176
177static struct thread_stat *thread_stat_findnew_first(u32 tid)
178{
179 struct thread_stat *st;
180
181 st = zalloc(sizeof(struct thread_stat));
182 if (!st)
183 die("memory allocation failed\n");
184 st->tid = tid;
185 INIT_LIST_HEAD(&st->seq_list);
186
187 rb_link_node(&st->rb, NULL, &thread_stats.rb_node);
188 rb_insert_color(&st->rb, &thread_stats);
189
190 thread_stat_findnew = thread_stat_findnew_after_first;
191 return st;
192}
193
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900194/* build simple key function one is bigger than two */
Ingo Molnar59f411b2010-01-31 08:27:58 +0100195#define SINGLE_KEY(member) \
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900196 static int lock_stat_key_ ## member(struct lock_stat *one, \
197 struct lock_stat *two) \
198 { \
199 return one->member > two->member; \
200 }
201
202SINGLE_KEY(nr_acquired)
203SINGLE_KEY(nr_contended)
204SINGLE_KEY(wait_time_total)
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900205SINGLE_KEY(wait_time_max)
206
Marcin Slusarz9df03ab2011-02-22 18:47:15 +0100207static int lock_stat_key_wait_time_min(struct lock_stat *one,
208 struct lock_stat *two)
209{
210 u64 s1 = one->wait_time_min;
211 u64 s2 = two->wait_time_min;
212 if (s1 == ULLONG_MAX)
213 s1 = 0;
214 if (s2 == ULLONG_MAX)
215 s2 = 0;
216 return s1 > s2;
217}
218
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900219struct lock_key {
220 /*
221 * name: the value for specify by user
222 * this should be simpler than raw name of member
223 * e.g. nr_acquired -> acquired, wait_time_total -> wait_total
224 */
Ingo Molnar59f411b2010-01-31 08:27:58 +0100225 const char *name;
226 int (*key)(struct lock_stat*, struct lock_stat*);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900227};
228
Ingo Molnar59f411b2010-01-31 08:27:58 +0100229static const char *sort_key = "acquired";
230
231static int (*compare)(struct lock_stat *, struct lock_stat *);
232
233static struct rb_root result; /* place to store sorted data */
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900234
235#define DEF_KEY_LOCK(name, fn_suffix) \
236 { #name, lock_stat_key_ ## fn_suffix }
237struct lock_key keys[] = {
238 DEF_KEY_LOCK(acquired, nr_acquired),
239 DEF_KEY_LOCK(contended, nr_contended),
240 DEF_KEY_LOCK(wait_total, wait_time_total),
241 DEF_KEY_LOCK(wait_min, wait_time_min),
242 DEF_KEY_LOCK(wait_max, wait_time_max),
243
244 /* extra comparisons much complicated should be here */
245
246 { NULL, NULL }
247};
248
249static void select_key(void)
250{
251 int i;
252
253 for (i = 0; keys[i].name; i++) {
254 if (!strcmp(keys[i].name, sort_key)) {
255 compare = keys[i].key;
256 return;
257 }
258 }
259
260 die("Unknown compare key:%s\n", sort_key);
261}
262
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900263static void insert_to_result(struct lock_stat *st,
Ingo Molnar59f411b2010-01-31 08:27:58 +0100264 int (*bigger)(struct lock_stat *, struct lock_stat *))
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900265{
266 struct rb_node **rb = &result.rb_node;
267 struct rb_node *parent = NULL;
268 struct lock_stat *p;
269
270 while (*rb) {
271 p = container_of(*rb, struct lock_stat, rb);
272 parent = *rb;
273
274 if (bigger(st, p))
275 rb = &(*rb)->rb_left;
276 else
277 rb = &(*rb)->rb_right;
278 }
279
280 rb_link_node(&st->rb, parent, rb);
281 rb_insert_color(&st->rb, &result);
282}
283
284/* returns left most element of result, and erase it */
285static struct lock_stat *pop_from_result(void)
286{
287 struct rb_node *node = result.rb_node;
288
289 if (!node)
290 return NULL;
291
292 while (node->rb_left)
293 node = node->rb_left;
294
295 rb_erase(node, &result);
296 return container_of(node, struct lock_stat, rb);
297}
298
Ingo Molnar59f411b2010-01-31 08:27:58 +0100299static struct lock_stat *lock_stat_findnew(void *addr, const char *name)
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900300{
301 struct list_head *entry = lockhashentry(addr);
302 struct lock_stat *ret, *new;
303
304 list_for_each_entry(ret, entry, hash_entry) {
305 if (ret->addr == addr)
306 return ret;
307 }
308
309 new = zalloc(sizeof(struct lock_stat));
310 if (!new)
311 goto alloc_failed;
312
313 new->addr = addr;
314 new->name = zalloc(sizeof(char) * strlen(name) + 1);
315 if (!new->name)
316 goto alloc_failed;
317 strcpy(new->name, name);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900318
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900319 new->wait_time_min = ULLONG_MAX;
320
321 list_add(&new->hash_entry, entry);
322 return new;
323
324alloc_failed:
325 die("memory allocation failed\n");
326}
327
328static char const *input_name = "perf.data";
329
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900330struct raw_event_sample {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100331 u32 size;
332 char data[0];
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900333};
334
335struct trace_acquire_event {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100336 void *addr;
337 const char *name;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900338 int flag;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900339};
340
341struct trace_acquired_event {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100342 void *addr;
343 const char *name;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900344};
345
346struct trace_contended_event {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100347 void *addr;
348 const char *name;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900349};
350
351struct trace_release_event {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100352 void *addr;
353 const char *name;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900354};
355
356struct trace_lock_handler {
357 void (*acquire_event)(struct trace_acquire_event *,
358 struct event *,
359 int cpu,
360 u64 timestamp,
361 struct thread *thread);
362
363 void (*acquired_event)(struct trace_acquired_event *,
364 struct event *,
365 int cpu,
366 u64 timestamp,
367 struct thread *thread);
368
369 void (*contended_event)(struct trace_contended_event *,
370 struct event *,
371 int cpu,
372 u64 timestamp,
373 struct thread *thread);
374
375 void (*release_event)(struct trace_release_event *,
376 struct event *,
377 int cpu,
378 u64 timestamp,
379 struct thread *thread);
380};
381
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900382static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr)
383{
384 struct lock_seq_stat *seq;
385
386 list_for_each_entry(seq, &ts->seq_list, list) {
387 if (seq->addr == addr)
388 return seq;
389 }
390
391 seq = zalloc(sizeof(struct lock_seq_stat));
392 if (!seq)
393 die("Not enough memory\n");
394 seq->state = SEQ_STATE_UNINITIALIZED;
395 seq->addr = addr;
396
397 list_add(&seq->list, &ts->seq_list);
398 return seq;
399}
400
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200401enum broken_state {
402 BROKEN_ACQUIRE,
403 BROKEN_ACQUIRED,
404 BROKEN_CONTENDED,
405 BROKEN_RELEASE,
406 BROKEN_MAX,
407};
408
409static int bad_hist[BROKEN_MAX];
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900410
Frederic Weisbecker84c7a212010-05-05 23:57:25 +0200411enum acquire_flags {
412 TRY_LOCK = 1,
413 READ_LOCK = 2,
414};
415
Ingo Molnar59f411b2010-01-31 08:27:58 +0100416static void
417report_lock_acquire_event(struct trace_acquire_event *acquire_event,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900418 struct event *__event __used,
419 int cpu __used,
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900420 u64 timestamp __used,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900421 struct thread *thread __used)
422{
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900423 struct lock_stat *ls;
424 struct thread_stat *ts;
425 struct lock_seq_stat *seq;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900426
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900427 ls = lock_stat_findnew(acquire_event->addr, acquire_event->name);
428 if (ls->discard)
429 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900430
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900431 ts = thread_stat_findnew(thread->pid);
432 seq = get_seq(ts, acquire_event->addr);
433
434 switch (seq->state) {
435 case SEQ_STATE_UNINITIALIZED:
436 case SEQ_STATE_RELEASED:
437 if (!acquire_event->flag) {
438 seq->state = SEQ_STATE_ACQUIRING;
439 } else {
Frederic Weisbecker84c7a212010-05-05 23:57:25 +0200440 if (acquire_event->flag & TRY_LOCK)
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900441 ls->nr_trylock++;
Frederic Weisbecker84c7a212010-05-05 23:57:25 +0200442 if (acquire_event->flag & READ_LOCK)
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900443 ls->nr_readlock++;
444 seq->state = SEQ_STATE_READ_ACQUIRED;
445 seq->read_count = 1;
446 ls->nr_acquired++;
447 }
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900448 break;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900449 case SEQ_STATE_READ_ACQUIRED:
Frederic Weisbecker84c7a212010-05-05 23:57:25 +0200450 if (acquire_event->flag & READ_LOCK) {
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900451 seq->read_count++;
452 ls->nr_acquired++;
453 goto end;
454 } else {
455 goto broken;
456 }
457 break;
458 case SEQ_STATE_ACQUIRED:
459 case SEQ_STATE_ACQUIRING:
460 case SEQ_STATE_CONTENDED:
461broken:
462 /* broken lock sequence, discard it */
463 ls->discard = 1;
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200464 bad_hist[BROKEN_ACQUIRE]++;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900465 list_del(&seq->list);
466 free(seq);
467 goto end;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900468 break;
469 default:
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900470 BUG_ON("Unknown state of lock sequence found!\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900471 break;
472 }
473
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900474 ls->nr_acquire++;
475 seq->prev_event_time = timestamp;
476end:
477 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900478}
479
Ingo Molnar59f411b2010-01-31 08:27:58 +0100480static void
481report_lock_acquired_event(struct trace_acquired_event *acquired_event,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900482 struct event *__event __used,
483 int cpu __used,
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900484 u64 timestamp __used,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900485 struct thread *thread __used)
486{
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900487 struct lock_stat *ls;
488 struct thread_stat *ts;
489 struct lock_seq_stat *seq;
490 u64 contended_term;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900491
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900492 ls = lock_stat_findnew(acquired_event->addr, acquired_event->name);
493 if (ls->discard)
494 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900495
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900496 ts = thread_stat_findnew(thread->pid);
497 seq = get_seq(ts, acquired_event->addr);
498
499 switch (seq->state) {
500 case SEQ_STATE_UNINITIALIZED:
501 /* orphan event, do nothing */
502 return;
503 case SEQ_STATE_ACQUIRING:
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900504 break;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900505 case SEQ_STATE_CONTENDED:
506 contended_term = timestamp - seq->prev_event_time;
507 ls->wait_time_total += contended_term;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900508 if (contended_term < ls->wait_time_min)
509 ls->wait_time_min = contended_term;
Frederic Weisbecker90c0e5f2010-05-07 02:33:42 +0200510 if (ls->wait_time_max < contended_term)
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900511 ls->wait_time_max = contended_term;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900512 break;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900513 case SEQ_STATE_RELEASED:
514 case SEQ_STATE_ACQUIRED:
515 case SEQ_STATE_READ_ACQUIRED:
516 /* broken lock sequence, discard it */
517 ls->discard = 1;
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200518 bad_hist[BROKEN_ACQUIRED]++;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900519 list_del(&seq->list);
520 free(seq);
521 goto end;
522 break;
523
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900524 default:
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900525 BUG_ON("Unknown state of lock sequence found!\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900526 break;
527 }
528
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900529 seq->state = SEQ_STATE_ACQUIRED;
530 ls->nr_acquired++;
531 seq->prev_event_time = timestamp;
532end:
533 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900534}
535
Ingo Molnar59f411b2010-01-31 08:27:58 +0100536static void
537report_lock_contended_event(struct trace_contended_event *contended_event,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900538 struct event *__event __used,
539 int cpu __used,
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900540 u64 timestamp __used,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900541 struct thread *thread __used)
542{
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900543 struct lock_stat *ls;
544 struct thread_stat *ts;
545 struct lock_seq_stat *seq;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900546
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900547 ls = lock_stat_findnew(contended_event->addr, contended_event->name);
548 if (ls->discard)
549 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900550
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900551 ts = thread_stat_findnew(thread->pid);
552 seq = get_seq(ts, contended_event->addr);
553
554 switch (seq->state) {
555 case SEQ_STATE_UNINITIALIZED:
556 /* orphan event, do nothing */
557 return;
558 case SEQ_STATE_ACQUIRING:
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900559 break;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900560 case SEQ_STATE_RELEASED:
561 case SEQ_STATE_ACQUIRED:
562 case SEQ_STATE_READ_ACQUIRED:
563 case SEQ_STATE_CONTENDED:
564 /* broken lock sequence, discard it */
565 ls->discard = 1;
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200566 bad_hist[BROKEN_CONTENDED]++;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900567 list_del(&seq->list);
568 free(seq);
569 goto end;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900570 break;
571 default:
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900572 BUG_ON("Unknown state of lock sequence found!\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900573 break;
574 }
575
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900576 seq->state = SEQ_STATE_CONTENDED;
577 ls->nr_contended++;
578 seq->prev_event_time = timestamp;
579end:
580 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900581}
582
Ingo Molnar59f411b2010-01-31 08:27:58 +0100583static void
584report_lock_release_event(struct trace_release_event *release_event,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900585 struct event *__event __used,
586 int cpu __used,
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900587 u64 timestamp __used,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900588 struct thread *thread __used)
589{
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900590 struct lock_stat *ls;
591 struct thread_stat *ts;
592 struct lock_seq_stat *seq;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900593
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900594 ls = lock_stat_findnew(release_event->addr, release_event->name);
595 if (ls->discard)
596 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900597
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900598 ts = thread_stat_findnew(thread->pid);
599 seq = get_seq(ts, release_event->addr);
600
601 switch (seq->state) {
602 case SEQ_STATE_UNINITIALIZED:
603 goto end;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900604 break;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900605 case SEQ_STATE_ACQUIRED:
606 break;
607 case SEQ_STATE_READ_ACQUIRED:
608 seq->read_count--;
609 BUG_ON(seq->read_count < 0);
610 if (!seq->read_count) {
611 ls->nr_release++;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900612 goto end;
613 }
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900614 break;
615 case SEQ_STATE_ACQUIRING:
616 case SEQ_STATE_CONTENDED:
617 case SEQ_STATE_RELEASED:
618 /* broken lock sequence, discard it */
619 ls->discard = 1;
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200620 bad_hist[BROKEN_RELEASE]++;
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900621 goto free_seq;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900622 break;
623 default:
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900624 BUG_ON("Unknown state of lock sequence found!\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900625 break;
626 }
627
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900628 ls->nr_release++;
629free_seq:
630 list_del(&seq->list);
631 free(seq);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900632end:
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900633 return;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900634}
635
636/* lock oriented handlers */
637/* TODO: handlers for CPU oriented, thread oriented */
Ingo Molnar59f411b2010-01-31 08:27:58 +0100638static struct trace_lock_handler report_lock_ops = {
639 .acquire_event = report_lock_acquire_event,
640 .acquired_event = report_lock_acquired_event,
641 .contended_event = report_lock_contended_event,
642 .release_event = report_lock_release_event,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900643};
644
645static struct trace_lock_handler *trace_handler;
646
647static void
648process_lock_acquire_event(void *data,
649 struct event *event __used,
650 int cpu __used,
651 u64 timestamp __used,
652 struct thread *thread __used)
653{
654 struct trace_acquire_event acquire_event;
655 u64 tmp; /* this is required for casting... */
656
657 tmp = raw_field_value(event, "lockdep_addr", data);
658 memcpy(&acquire_event.addr, &tmp, sizeof(void *));
659 acquire_event.name = (char *)raw_field_ptr(event, "name", data);
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900660 acquire_event.flag = (int)raw_field_value(event, "flag", data);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900661
Ingo Molnar59f411b2010-01-31 08:27:58 +0100662 if (trace_handler->acquire_event)
663 trace_handler->acquire_event(&acquire_event, event, cpu, timestamp, thread);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900664}
665
666static void
667process_lock_acquired_event(void *data,
668 struct event *event __used,
669 int cpu __used,
670 u64 timestamp __used,
671 struct thread *thread __used)
672{
673 struct trace_acquired_event acquired_event;
674 u64 tmp; /* this is required for casting... */
675
676 tmp = raw_field_value(event, "lockdep_addr", data);
677 memcpy(&acquired_event.addr, &tmp, sizeof(void *));
678 acquired_event.name = (char *)raw_field_ptr(event, "name", data);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900679
Ingo Molnar59f411b2010-01-31 08:27:58 +0100680 if (trace_handler->acquire_event)
681 trace_handler->acquired_event(&acquired_event, event, cpu, timestamp, thread);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900682}
683
684static void
685process_lock_contended_event(void *data,
686 struct event *event __used,
687 int cpu __used,
688 u64 timestamp __used,
689 struct thread *thread __used)
690{
691 struct trace_contended_event contended_event;
692 u64 tmp; /* this is required for casting... */
693
694 tmp = raw_field_value(event, "lockdep_addr", data);
695 memcpy(&contended_event.addr, &tmp, sizeof(void *));
696 contended_event.name = (char *)raw_field_ptr(event, "name", data);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900697
Ingo Molnar59f411b2010-01-31 08:27:58 +0100698 if (trace_handler->acquire_event)
699 trace_handler->contended_event(&contended_event, event, cpu, timestamp, thread);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900700}
701
702static void
703process_lock_release_event(void *data,
704 struct event *event __used,
705 int cpu __used,
706 u64 timestamp __used,
707 struct thread *thread __used)
708{
709 struct trace_release_event release_event;
710 u64 tmp; /* this is required for casting... */
711
712 tmp = raw_field_value(event, "lockdep_addr", data);
713 memcpy(&release_event.addr, &tmp, sizeof(void *));
714 release_event.name = (char *)raw_field_ptr(event, "name", data);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900715
Ingo Molnar59f411b2010-01-31 08:27:58 +0100716 if (trace_handler->acquire_event)
717 trace_handler->release_event(&release_event, event, cpu, timestamp, thread);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900718}
719
720static void
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200721process_raw_event(void *data, int cpu, u64 timestamp, struct thread *thread)
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900722{
723 struct event *event;
724 int type;
725
726 type = trace_parse_common_type(data);
727 event = trace_find_event(type);
728
729 if (!strcmp(event->name, "lock_acquire"))
730 process_lock_acquire_event(data, event, cpu, timestamp, thread);
731 if (!strcmp(event->name, "lock_acquired"))
732 process_lock_acquired_event(data, event, cpu, timestamp, thread);
733 if (!strcmp(event->name, "lock_contended"))
734 process_lock_contended_event(data, event, cpu, timestamp, thread);
735 if (!strcmp(event->name, "lock_release"))
736 process_lock_release_event(data, event, cpu, timestamp, thread);
737}
738
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200739static void print_bad_events(int bad, int total)
740{
741 /* Output for debug, this have to be removed */
742 int i;
743 const char *name[4] =
744 { "acquire", "acquired", "contended", "release" };
745
746 pr_info("\n=== output for debug===\n\n");
Frederic Weisbecker5efe08c2010-05-06 04:55:22 +0200747 pr_info("bad: %d, total: %d\n", bad, total);
748 pr_info("bad rate: %f %%\n", (double)bad / (double)total * 100);
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200749 pr_info("histogram of events caused bad sequence\n");
750 for (i = 0; i < BROKEN_MAX; i++)
751 pr_info(" %10s: %d\n", name[i], bad_hist[i]);
752}
753
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900754/* TODO: various way to print, coloring, nano or milli sec */
755static void print_result(void)
756{
757 struct lock_stat *st;
758 char cut_name[20];
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900759 int bad, total;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900760
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900761 pr_info("%20s ", "Name");
762 pr_info("%10s ", "acquired");
763 pr_info("%10s ", "contended");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900764
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900765 pr_info("%15s ", "total wait (ns)");
766 pr_info("%15s ", "max wait (ns)");
767 pr_info("%15s ", "min wait (ns)");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900768
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900769 pr_info("\n\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900770
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900771 bad = total = 0;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900772 while ((st = pop_from_result())) {
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900773 total++;
774 if (st->discard) {
775 bad++;
776 continue;
777 }
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900778 bzero(cut_name, 20);
779
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900780 if (strlen(st->name) < 16) {
781 /* output raw name */
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900782 pr_info("%20s ", st->name);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900783 } else {
784 strncpy(cut_name, st->name, 16);
785 cut_name[16] = '.';
786 cut_name[17] = '.';
787 cut_name[18] = '.';
788 cut_name[19] = '\0';
789 /* cut off name for saving output style */
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900790 pr_info("%20s ", cut_name);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900791 }
792
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900793 pr_info("%10u ", st->nr_acquired);
794 pr_info("%10u ", st->nr_contended);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900795
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200796 pr_info("%15" PRIu64 " ", st->wait_time_total);
797 pr_info("%15" PRIu64 " ", st->wait_time_max);
798 pr_info("%15" PRIu64 " ", st->wait_time_min == ULLONG_MAX ?
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900799 0 : st->wait_time_min);
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900800 pr_info("\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900801 }
Hitoshi Mitakee4cef1f2010-04-21 21:23:54 +0900802
Frederic Weisbecker10350ec2010-05-05 23:47:28 +0200803 print_bad_events(bad, total);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900804}
805
Arnaldo Carvalho de Melo80354582010-05-17 15:51:10 -0300806static bool info_threads, info_map;
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900807
808static void dump_threads(void)
809{
810 struct thread_stat *st;
811 struct rb_node *node;
812 struct thread *t;
813
814 pr_info("%10s: comm\n", "Thread ID");
815
816 node = rb_first(&thread_stats);
817 while (node) {
818 st = container_of(node, struct thread_stat, rb);
819 t = perf_session__findnew(session, st->tid);
820 pr_info("%10d: %s\n", st->tid, t->comm);
821 node = rb_next(node);
822 };
823}
824
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900825static void dump_map(void)
826{
827 unsigned int i;
828 struct lock_stat *st;
829
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900830 pr_info("Address of instance: name of class\n");
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900831 for (i = 0; i < LOCKHASH_SIZE; i++) {
832 list_for_each_entry(st, &lockhash_table[i], hash_entry) {
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900833 pr_info(" %p: %s\n", st->addr, st->name);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900834 }
835 }
836}
837
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900838static void dump_info(void)
839{
840 if (info_threads)
841 dump_threads();
842 else if (info_map)
843 dump_map();
844 else
845 die("Unknown type of information\n");
846}
847
Arnaldo Carvalho de Melo8115d602011-01-29 14:01:45 -0200848static int process_sample_event(union perf_event *event, struct perf_sample *sample,
Arnaldo Carvalho de Melo640c03c2010-12-02 14:10:21 -0200849 struct perf_session *s)
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200850{
Arnaldo Carvalho de Melo640c03c2010-12-02 14:10:21 -0200851 struct thread *thread = perf_session__findnew(s, sample->tid);
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200852
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200853 if (thread == NULL) {
854 pr_debug("problem processing %d event, skipping it.\n",
Arnaldo Carvalho de Melo8115d602011-01-29 14:01:45 -0200855 event->header.type);
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200856 return -1;
857 }
858
Arnaldo Carvalho de Melo640c03c2010-12-02 14:10:21 -0200859 process_raw_event(sample->raw_data, sample->cpu, sample->time, thread);
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200860
861 return 0;
862}
863
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900864static struct perf_event_ops eops = {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100865 .sample = process_sample_event,
Arnaldo Carvalho de Melo8115d602011-01-29 14:01:45 -0200866 .comm = perf_event__process_comm,
Frederic Weisbeckerc61e52e2010-04-24 00:04:12 +0200867 .ordered_samples = true,
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900868};
869
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900870static int read_events(void)
871{
Ian Munsie21ef97f2010-12-10 14:09:16 +1100872 session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900873 if (!session)
874 die("Initializing perf session failed\n");
875
876 return perf_session__process_events(session, &eops);
877}
878
879static void sort_result(void)
880{
881 unsigned int i;
882 struct lock_stat *st;
883
884 for (i = 0; i < LOCKHASH_SIZE; i++) {
885 list_for_each_entry(st, &lockhash_table[i], hash_entry) {
886 insert_to_result(st, compare);
887 }
888 }
889}
890
Ingo Molnar59f411b2010-01-31 08:27:58 +0100891static void __cmd_report(void)
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900892{
893 setup_pager();
894 select_key();
895 read_events();
896 sort_result();
897 print_result();
898}
899
Ingo Molnar59f411b2010-01-31 08:27:58 +0100900static const char * const report_usage[] = {
901 "perf lock report [<options>]",
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900902 NULL
903};
904
Ingo Molnar59f411b2010-01-31 08:27:58 +0100905static const struct option report_options[] = {
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900906 OPT_STRING('k', "key", &sort_key, "acquired",
Marcin Slusarz9826e832011-02-22 21:53:12 +0100907 "key for sorting (acquired / contended / wait_total / wait_max / wait_min)"),
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900908 /* TODO: type */
909 OPT_END()
910};
911
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900912static const char * const info_usage[] = {
913 "perf lock info [<options>]",
914 NULL
915};
916
917static const struct option info_options[] = {
918 OPT_BOOLEAN('t', "threads", &info_threads,
919 "dump thread list in perf.data"),
920 OPT_BOOLEAN('m', "map", &info_map,
921 "map of lock instances (name:address table)"),
922 OPT_END()
923};
924
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900925static const char * const lock_usage[] = {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100926 "perf lock [<options>] {record|trace|report}",
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900927 NULL
928};
929
930static const struct option lock_options[] = {
Ingo Molnar59f411b2010-01-31 08:27:58 +0100931 OPT_STRING('i', "input", &input_name, "file", "input file name"),
Ian Munsiec0555642010-04-13 18:37:33 +1000932 OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"),
Ingo Molnar59f411b2010-01-31 08:27:58 +0100933 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"),
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900934 OPT_END()
935};
936
937static const char *record_args[] = {
938 "record",
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900939 "-R",
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900940 "-f",
941 "-m", "1024",
942 "-c", "1",
943 "-e", "lock:lock_acquire:r",
944 "-e", "lock:lock_acquired:r",
945 "-e", "lock:lock_contended:r",
946 "-e", "lock:lock_release:r",
947};
948
949static int __cmd_record(int argc, const char **argv)
950{
951 unsigned int rec_argc, i, j;
952 const char **rec_argv;
953
954 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
955 rec_argv = calloc(rec_argc + 1, sizeof(char *));
956
Chris Samuelce47dc52010-11-13 13:35:06 +1100957 if (rec_argv == NULL)
958 return -ENOMEM;
959
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900960 for (i = 0; i < ARRAY_SIZE(record_args); i++)
961 rec_argv[i] = strdup(record_args[i]);
962
963 for (j = 1; j < (unsigned int)argc; j++, i++)
964 rec_argv[i] = argv[j];
965
966 BUG_ON(i != rec_argc);
967
968 return cmd_record(i, rec_argv, NULL);
969}
970
971int cmd_lock(int argc, const char **argv, const char *prefix __used)
972{
973 unsigned int i;
974
975 symbol__init();
976 for (i = 0; i < LOCKHASH_SIZE; i++)
977 INIT_LIST_HEAD(lockhash_table + i);
978
979 argc = parse_options(argc, argv, lock_options, lock_usage,
980 PARSE_OPT_STOP_AT_NON_OPTION);
981 if (!argc)
982 usage_with_options(lock_usage, lock_options);
983
984 if (!strncmp(argv[0], "rec", 3)) {
985 return __cmd_record(argc, argv);
Ingo Molnar59f411b2010-01-31 08:27:58 +0100986 } else if (!strncmp(argv[0], "report", 6)) {
987 trace_handler = &report_lock_ops;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900988 if (argc) {
989 argc = parse_options(argc, argv,
Ingo Molnar59f411b2010-01-31 08:27:58 +0100990 report_options, report_usage, 0);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900991 if (argc)
Ingo Molnar59f411b2010-01-31 08:27:58 +0100992 usage_with_options(report_usage, report_options);
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +0900993 }
Ingo Molnar59f411b2010-01-31 08:27:58 +0100994 __cmd_report();
Ingo Molnar133dc4c2010-11-16 18:45:39 +0100995 } else if (!strcmp(argv[0], "script")) {
996 /* Aliased to 'perf script' */
997 return cmd_script(argc, argv, prefix);
Hitoshi Mitake26242d82010-05-03 14:12:00 +0900998 } else if (!strcmp(argv[0], "info")) {
999 if (argc) {
1000 argc = parse_options(argc, argv,
1001 info_options, info_usage, 0);
1002 if (argc)
1003 usage_with_options(info_usage, info_options);
1004 }
Ingo Molnar59f411b2010-01-31 08:27:58 +01001005 /* recycling report_lock_ops */
1006 trace_handler = &report_lock_ops;
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +09001007 setup_pager();
1008 read_events();
Hitoshi Mitake26242d82010-05-03 14:12:00 +09001009 dump_info();
Hitoshi Mitake9b5e3502010-01-30 20:43:33 +09001010 } else {
1011 usage_with_options(lock_usage, lock_options);
1012 }
1013
1014 return 0;
1015}