Merge tag 'soc2-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[firefly-linux-kernel-4.4.55.git] / tools / perf / builtin-lock.c
1 #include "builtin.h"
2 #include "perf.h"
3
4 #include "util/evlist.h"
5 #include "util/evsel.h"
6 #include "util/util.h"
7 #include "util/cache.h"
8 #include "util/symbol.h"
9 #include "util/thread.h"
10 #include "util/header.h"
11
12 #include "util/parse-options.h"
13 #include "util/trace-event.h"
14
15 #include "util/debug.h"
16 #include "util/session.h"
17 #include "util/tool.h"
18 #include "util/data.h"
19
20 #include <sys/types.h>
21 #include <sys/prctl.h>
22 #include <semaphore.h>
23 #include <pthread.h>
24 #include <math.h>
25 #include <limits.h>
26
27 #include <linux/list.h>
28 #include <linux/hash.h>
29
30 static struct perf_session *session;
31
32 /* based on kernel/lockdep.c */
33 #define LOCKHASH_BITS           12
34 #define LOCKHASH_SIZE           (1UL << LOCKHASH_BITS)
35
36 static struct list_head lockhash_table[LOCKHASH_SIZE];
37
38 #define __lockhashfn(key)       hash_long((unsigned long)key, LOCKHASH_BITS)
39 #define lockhashentry(key)      (lockhash_table + __lockhashfn((key)))
40
41 struct lock_stat {
42         struct list_head        hash_entry;
43         struct rb_node          rb;             /* used for sorting */
44
45         /*
46          * FIXME: perf_evsel__intval() returns u64,
47          * so address of lockdep_map should be dealed as 64bit.
48          * Is there more better solution?
49          */
50         void                    *addr;          /* address of lockdep_map, used as ID */
51         char                    *name;          /* for strcpy(), we cannot use const */
52
53         unsigned int            nr_acquire;
54         unsigned int            nr_acquired;
55         unsigned int            nr_contended;
56         unsigned int            nr_release;
57
58         unsigned int            nr_readlock;
59         unsigned int            nr_trylock;
60
61         /* these times are in nano sec. */
62         u64                     avg_wait_time;
63         u64                     wait_time_total;
64         u64                     wait_time_min;
65         u64                     wait_time_max;
66
67         int                     discard; /* flag of blacklist */
68 };
69
70 /*
71  * States of lock_seq_stat
72  *
73  * UNINITIALIZED is required for detecting first event of acquire.
74  * As the nature of lock events, there is no guarantee
75  * that the first event for the locks are acquire,
76  * it can be acquired, contended or release.
77  */
78 #define SEQ_STATE_UNINITIALIZED      0         /* initial state */
79 #define SEQ_STATE_RELEASED      1
80 #define SEQ_STATE_ACQUIRING     2
81 #define SEQ_STATE_ACQUIRED      3
82 #define SEQ_STATE_READ_ACQUIRED 4
83 #define SEQ_STATE_CONTENDED     5
84
85 /*
86  * MAX_LOCK_DEPTH
87  * Imported from include/linux/sched.h.
88  * Should this be synchronized?
89  */
90 #define MAX_LOCK_DEPTH 48
91
92 /*
93  * struct lock_seq_stat:
94  * Place to put on state of one lock sequence
95  * 1) acquire -> acquired -> release
96  * 2) acquire -> contended -> acquired -> release
97  * 3) acquire (with read or try) -> release
98  * 4) Are there other patterns?
99  */
100 struct lock_seq_stat {
101         struct list_head        list;
102         int                     state;
103         u64                     prev_event_time;
104         void                    *addr;
105
106         int                     read_count;
107 };
108
109 struct thread_stat {
110         struct rb_node          rb;
111
112         u32                     tid;
113         struct list_head        seq_list;
114 };
115
116 static struct rb_root           thread_stats;
117
118 static struct thread_stat *thread_stat_find(u32 tid)
119 {
120         struct rb_node *node;
121         struct thread_stat *st;
122
123         node = thread_stats.rb_node;
124         while (node) {
125                 st = container_of(node, struct thread_stat, rb);
126                 if (st->tid == tid)
127                         return st;
128                 else if (tid < st->tid)
129                         node = node->rb_left;
130                 else
131                         node = node->rb_right;
132         }
133
134         return NULL;
135 }
136
137 static void thread_stat_insert(struct thread_stat *new)
138 {
139         struct rb_node **rb = &thread_stats.rb_node;
140         struct rb_node *parent = NULL;
141         struct thread_stat *p;
142
143         while (*rb) {
144                 p = container_of(*rb, struct thread_stat, rb);
145                 parent = *rb;
146
147                 if (new->tid < p->tid)
148                         rb = &(*rb)->rb_left;
149                 else if (new->tid > p->tid)
150                         rb = &(*rb)->rb_right;
151                 else
152                         BUG_ON("inserting invalid thread_stat\n");
153         }
154
155         rb_link_node(&new->rb, parent, rb);
156         rb_insert_color(&new->rb, &thread_stats);
157 }
158
159 static struct thread_stat *thread_stat_findnew_after_first(u32 tid)
160 {
161         struct thread_stat *st;
162
163         st = thread_stat_find(tid);
164         if (st)
165                 return st;
166
167         st = zalloc(sizeof(struct thread_stat));
168         if (!st) {
169                 pr_err("memory allocation failed\n");
170                 return NULL;
171         }
172
173         st->tid = tid;
174         INIT_LIST_HEAD(&st->seq_list);
175
176         thread_stat_insert(st);
177
178         return st;
179 }
180
181 static struct thread_stat *thread_stat_findnew_first(u32 tid);
182 static struct thread_stat *(*thread_stat_findnew)(u32 tid) =
183         thread_stat_findnew_first;
184
185 static struct thread_stat *thread_stat_findnew_first(u32 tid)
186 {
187         struct thread_stat *st;
188
189         st = zalloc(sizeof(struct thread_stat));
190         if (!st) {
191                 pr_err("memory allocation failed\n");
192                 return NULL;
193         }
194         st->tid = tid;
195         INIT_LIST_HEAD(&st->seq_list);
196
197         rb_link_node(&st->rb, NULL, &thread_stats.rb_node);
198         rb_insert_color(&st->rb, &thread_stats);
199
200         thread_stat_findnew = thread_stat_findnew_after_first;
201         return st;
202 }
203
204 /* build simple key function one is bigger than two */
205 #define SINGLE_KEY(member)                                              \
206         static int lock_stat_key_ ## member(struct lock_stat *one,      \
207                                          struct lock_stat *two)         \
208         {                                                               \
209                 return one->member > two->member;                       \
210         }
211
212 SINGLE_KEY(nr_acquired)
213 SINGLE_KEY(nr_contended)
214 SINGLE_KEY(avg_wait_time)
215 SINGLE_KEY(wait_time_total)
216 SINGLE_KEY(wait_time_max)
217
218 static int lock_stat_key_wait_time_min(struct lock_stat *one,
219                                         struct lock_stat *two)
220 {
221         u64 s1 = one->wait_time_min;
222         u64 s2 = two->wait_time_min;
223         if (s1 == ULLONG_MAX)
224                 s1 = 0;
225         if (s2 == ULLONG_MAX)
226                 s2 = 0;
227         return s1 > s2;
228 }
229
230 struct lock_key {
231         /*
232          * name: the value for specify by user
233          * this should be simpler than raw name of member
234          * e.g. nr_acquired -> acquired, wait_time_total -> wait_total
235          */
236         const char              *name;
237         int                     (*key)(struct lock_stat*, struct lock_stat*);
238 };
239
240 static const char               *sort_key = "acquired";
241
242 static int                      (*compare)(struct lock_stat *, struct lock_stat *);
243
244 static struct rb_root           result; /* place to store sorted data */
245
246 #define DEF_KEY_LOCK(name, fn_suffix)   \
247         { #name, lock_stat_key_ ## fn_suffix }
248 struct lock_key keys[] = {
249         DEF_KEY_LOCK(acquired, nr_acquired),
250         DEF_KEY_LOCK(contended, nr_contended),
251         DEF_KEY_LOCK(avg_wait, avg_wait_time),
252         DEF_KEY_LOCK(wait_total, wait_time_total),
253         DEF_KEY_LOCK(wait_min, wait_time_min),
254         DEF_KEY_LOCK(wait_max, wait_time_max),
255
256         /* extra comparisons much complicated should be here */
257
258         { NULL, NULL }
259 };
260
261 static int select_key(void)
262 {
263         int i;
264
265         for (i = 0; keys[i].name; i++) {
266                 if (!strcmp(keys[i].name, sort_key)) {
267                         compare = keys[i].key;
268                         return 0;
269                 }
270         }
271
272         pr_err("Unknown compare key: %s\n", sort_key);
273
274         return -1;
275 }
276
277 static void insert_to_result(struct lock_stat *st,
278                              int (*bigger)(struct lock_stat *, struct lock_stat *))
279 {
280         struct rb_node **rb = &result.rb_node;
281         struct rb_node *parent = NULL;
282         struct lock_stat *p;
283
284         while (*rb) {
285                 p = container_of(*rb, struct lock_stat, rb);
286                 parent = *rb;
287
288                 if (bigger(st, p))
289                         rb = &(*rb)->rb_left;
290                 else
291                         rb = &(*rb)->rb_right;
292         }
293
294         rb_link_node(&st->rb, parent, rb);
295         rb_insert_color(&st->rb, &result);
296 }
297
298 /* returns left most element of result, and erase it */
299 static struct lock_stat *pop_from_result(void)
300 {
301         struct rb_node *node = result.rb_node;
302
303         if (!node)
304                 return NULL;
305
306         while (node->rb_left)
307                 node = node->rb_left;
308
309         rb_erase(node, &result);
310         return container_of(node, struct lock_stat, rb);
311 }
312
313 static struct lock_stat *lock_stat_findnew(void *addr, const char *name)
314 {
315         struct list_head *entry = lockhashentry(addr);
316         struct lock_stat *ret, *new;
317
318         list_for_each_entry(ret, entry, hash_entry) {
319                 if (ret->addr == addr)
320                         return ret;
321         }
322
323         new = zalloc(sizeof(struct lock_stat));
324         if (!new)
325                 goto alloc_failed;
326
327         new->addr = addr;
328         new->name = zalloc(sizeof(char) * strlen(name) + 1);
329         if (!new->name) {
330                 free(new);
331                 goto alloc_failed;
332         }
333
334         strcpy(new->name, name);
335         new->wait_time_min = ULLONG_MAX;
336
337         list_add(&new->hash_entry, entry);
338         return new;
339
340 alloc_failed:
341         pr_err("memory allocation failed\n");
342         return NULL;
343 }
344
345 struct trace_lock_handler {
346         int (*acquire_event)(struct perf_evsel *evsel,
347                              struct perf_sample *sample);
348
349         int (*acquired_event)(struct perf_evsel *evsel,
350                               struct perf_sample *sample);
351
352         int (*contended_event)(struct perf_evsel *evsel,
353                                struct perf_sample *sample);
354
355         int (*release_event)(struct perf_evsel *evsel,
356                              struct perf_sample *sample);
357 };
358
359 static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr)
360 {
361         struct lock_seq_stat *seq;
362
363         list_for_each_entry(seq, &ts->seq_list, list) {
364                 if (seq->addr == addr)
365                         return seq;
366         }
367
368         seq = zalloc(sizeof(struct lock_seq_stat));
369         if (!seq) {
370                 pr_err("memory allocation failed\n");
371                 return NULL;
372         }
373         seq->state = SEQ_STATE_UNINITIALIZED;
374         seq->addr = addr;
375
376         list_add(&seq->list, &ts->seq_list);
377         return seq;
378 }
379
380 enum broken_state {
381         BROKEN_ACQUIRE,
382         BROKEN_ACQUIRED,
383         BROKEN_CONTENDED,
384         BROKEN_RELEASE,
385         BROKEN_MAX,
386 };
387
388 static int bad_hist[BROKEN_MAX];
389
390 enum acquire_flags {
391         TRY_LOCK = 1,
392         READ_LOCK = 2,
393 };
394
395 static int report_lock_acquire_event(struct perf_evsel *evsel,
396                                      struct perf_sample *sample)
397 {
398         void *addr;
399         struct lock_stat *ls;
400         struct thread_stat *ts;
401         struct lock_seq_stat *seq;
402         const char *name = perf_evsel__strval(evsel, sample, "name");
403         u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
404         int flag = perf_evsel__intval(evsel, sample, "flag");
405
406         memcpy(&addr, &tmp, sizeof(void *));
407
408         ls = lock_stat_findnew(addr, name);
409         if (!ls)
410                 return -ENOMEM;
411         if (ls->discard)
412                 return 0;
413
414         ts = thread_stat_findnew(sample->tid);
415         if (!ts)
416                 return -ENOMEM;
417
418         seq = get_seq(ts, addr);
419         if (!seq)
420                 return -ENOMEM;
421
422         switch (seq->state) {
423         case SEQ_STATE_UNINITIALIZED:
424         case SEQ_STATE_RELEASED:
425                 if (!flag) {
426                         seq->state = SEQ_STATE_ACQUIRING;
427                 } else {
428                         if (flag & TRY_LOCK)
429                                 ls->nr_trylock++;
430                         if (flag & READ_LOCK)
431                                 ls->nr_readlock++;
432                         seq->state = SEQ_STATE_READ_ACQUIRED;
433                         seq->read_count = 1;
434                         ls->nr_acquired++;
435                 }
436                 break;
437         case SEQ_STATE_READ_ACQUIRED:
438                 if (flag & READ_LOCK) {
439                         seq->read_count++;
440                         ls->nr_acquired++;
441                         goto end;
442                 } else {
443                         goto broken;
444                 }
445                 break;
446         case SEQ_STATE_ACQUIRED:
447         case SEQ_STATE_ACQUIRING:
448         case SEQ_STATE_CONTENDED:
449 broken:
450                 /* broken lock sequence, discard it */
451                 ls->discard = 1;
452                 bad_hist[BROKEN_ACQUIRE]++;
453                 list_del(&seq->list);
454                 free(seq);
455                 goto end;
456         default:
457                 BUG_ON("Unknown state of lock sequence found!\n");
458                 break;
459         }
460
461         ls->nr_acquire++;
462         seq->prev_event_time = sample->time;
463 end:
464         return 0;
465 }
466
467 static int report_lock_acquired_event(struct perf_evsel *evsel,
468                                       struct perf_sample *sample)
469 {
470         void *addr;
471         struct lock_stat *ls;
472         struct thread_stat *ts;
473         struct lock_seq_stat *seq;
474         u64 contended_term;
475         const char *name = perf_evsel__strval(evsel, sample, "name");
476         u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
477
478         memcpy(&addr, &tmp, sizeof(void *));
479
480         ls = lock_stat_findnew(addr, name);
481         if (!ls)
482                 return -ENOMEM;
483         if (ls->discard)
484                 return 0;
485
486         ts = thread_stat_findnew(sample->tid);
487         if (!ts)
488                 return -ENOMEM;
489
490         seq = get_seq(ts, addr);
491         if (!seq)
492                 return -ENOMEM;
493
494         switch (seq->state) {
495         case SEQ_STATE_UNINITIALIZED:
496                 /* orphan event, do nothing */
497                 return 0;
498         case SEQ_STATE_ACQUIRING:
499                 break;
500         case SEQ_STATE_CONTENDED:
501                 contended_term = sample->time - seq->prev_event_time;
502                 ls->wait_time_total += contended_term;
503                 if (contended_term < ls->wait_time_min)
504                         ls->wait_time_min = contended_term;
505                 if (ls->wait_time_max < contended_term)
506                         ls->wait_time_max = contended_term;
507                 break;
508         case SEQ_STATE_RELEASED:
509         case SEQ_STATE_ACQUIRED:
510         case SEQ_STATE_READ_ACQUIRED:
511                 /* broken lock sequence, discard it */
512                 ls->discard = 1;
513                 bad_hist[BROKEN_ACQUIRED]++;
514                 list_del(&seq->list);
515                 free(seq);
516                 goto end;
517         default:
518                 BUG_ON("Unknown state of lock sequence found!\n");
519                 break;
520         }
521
522         seq->state = SEQ_STATE_ACQUIRED;
523         ls->nr_acquired++;
524         ls->avg_wait_time = ls->nr_contended ? ls->wait_time_total/ls->nr_contended : 0;
525         seq->prev_event_time = sample->time;
526 end:
527         return 0;
528 }
529
530 static int report_lock_contended_event(struct perf_evsel *evsel,
531                                        struct perf_sample *sample)
532 {
533         void *addr;
534         struct lock_stat *ls;
535         struct thread_stat *ts;
536         struct lock_seq_stat *seq;
537         const char *name = perf_evsel__strval(evsel, sample, "name");
538         u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
539
540         memcpy(&addr, &tmp, sizeof(void *));
541
542         ls = lock_stat_findnew(addr, name);
543         if (!ls)
544                 return -ENOMEM;
545         if (ls->discard)
546                 return 0;
547
548         ts = thread_stat_findnew(sample->tid);
549         if (!ts)
550                 return -ENOMEM;
551
552         seq = get_seq(ts, addr);
553         if (!seq)
554                 return -ENOMEM;
555
556         switch (seq->state) {
557         case SEQ_STATE_UNINITIALIZED:
558                 /* orphan event, do nothing */
559                 return 0;
560         case SEQ_STATE_ACQUIRING:
561                 break;
562         case SEQ_STATE_RELEASED:
563         case SEQ_STATE_ACQUIRED:
564         case SEQ_STATE_READ_ACQUIRED:
565         case SEQ_STATE_CONTENDED:
566                 /* broken lock sequence, discard it */
567                 ls->discard = 1;
568                 bad_hist[BROKEN_CONTENDED]++;
569                 list_del(&seq->list);
570                 free(seq);
571                 goto end;
572         default:
573                 BUG_ON("Unknown state of lock sequence found!\n");
574                 break;
575         }
576
577         seq->state = SEQ_STATE_CONTENDED;
578         ls->nr_contended++;
579         ls->avg_wait_time = ls->wait_time_total/ls->nr_contended;
580         seq->prev_event_time = sample->time;
581 end:
582         return 0;
583 }
584
585 static int report_lock_release_event(struct perf_evsel *evsel,
586                                      struct perf_sample *sample)
587 {
588         void *addr;
589         struct lock_stat *ls;
590         struct thread_stat *ts;
591         struct lock_seq_stat *seq;
592         const char *name = perf_evsel__strval(evsel, sample, "name");
593         u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr");
594
595         memcpy(&addr, &tmp, sizeof(void *));
596
597         ls = lock_stat_findnew(addr, name);
598         if (!ls)
599                 return -ENOMEM;
600         if (ls->discard)
601                 return 0;
602
603         ts = thread_stat_findnew(sample->tid);
604         if (!ts)
605                 return -ENOMEM;
606
607         seq = get_seq(ts, addr);
608         if (!seq)
609                 return -ENOMEM;
610
611         switch (seq->state) {
612         case SEQ_STATE_UNINITIALIZED:
613                 goto end;
614         case SEQ_STATE_ACQUIRED:
615                 break;
616         case SEQ_STATE_READ_ACQUIRED:
617                 seq->read_count--;
618                 BUG_ON(seq->read_count < 0);
619                 if (!seq->read_count) {
620                         ls->nr_release++;
621                         goto end;
622                 }
623                 break;
624         case SEQ_STATE_ACQUIRING:
625         case SEQ_STATE_CONTENDED:
626         case SEQ_STATE_RELEASED:
627                 /* broken lock sequence, discard it */
628                 ls->discard = 1;
629                 bad_hist[BROKEN_RELEASE]++;
630                 goto free_seq;
631         default:
632                 BUG_ON("Unknown state of lock sequence found!\n");
633                 break;
634         }
635
636         ls->nr_release++;
637 free_seq:
638         list_del(&seq->list);
639         free(seq);
640 end:
641         return 0;
642 }
643
644 /* lock oriented handlers */
645 /* TODO: handlers for CPU oriented, thread oriented */
646 static struct trace_lock_handler report_lock_ops  = {
647         .acquire_event          = report_lock_acquire_event,
648         .acquired_event         = report_lock_acquired_event,
649         .contended_event        = report_lock_contended_event,
650         .release_event          = report_lock_release_event,
651 };
652
653 static struct trace_lock_handler *trace_handler;
654
655 static int perf_evsel__process_lock_acquire(struct perf_evsel *evsel,
656                                              struct perf_sample *sample)
657 {
658         if (trace_handler->acquire_event)
659                 return trace_handler->acquire_event(evsel, sample);
660         return 0;
661 }
662
663 static int perf_evsel__process_lock_acquired(struct perf_evsel *evsel,
664                                               struct perf_sample *sample)
665 {
666         if (trace_handler->acquired_event)
667                 return trace_handler->acquired_event(evsel, sample);
668         return 0;
669 }
670
671 static int perf_evsel__process_lock_contended(struct perf_evsel *evsel,
672                                               struct perf_sample *sample)
673 {
674         if (trace_handler->contended_event)
675                 return trace_handler->contended_event(evsel, sample);
676         return 0;
677 }
678
679 static int perf_evsel__process_lock_release(struct perf_evsel *evsel,
680                                             struct perf_sample *sample)
681 {
682         if (trace_handler->release_event)
683                 return trace_handler->release_event(evsel, sample);
684         return 0;
685 }
686
687 static void print_bad_events(int bad, int total)
688 {
689         /* Output for debug, this have to be removed */
690         int i;
691         const char *name[4] =
692                 { "acquire", "acquired", "contended", "release" };
693
694         pr_info("\n=== output for debug===\n\n");
695         pr_info("bad: %d, total: %d\n", bad, total);
696         pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100);
697         pr_info("histogram of events caused bad sequence\n");
698         for (i = 0; i < BROKEN_MAX; i++)
699                 pr_info(" %10s: %d\n", name[i], bad_hist[i]);
700 }
701
702 /* TODO: various way to print, coloring, nano or milli sec */
703 static void print_result(void)
704 {
705         struct lock_stat *st;
706         char cut_name[20];
707         int bad, total;
708
709         pr_info("%20s ", "Name");
710         pr_info("%10s ", "acquired");
711         pr_info("%10s ", "contended");
712
713         pr_info("%15s ", "avg wait (ns)");
714         pr_info("%15s ", "total wait (ns)");
715         pr_info("%15s ", "max wait (ns)");
716         pr_info("%15s ", "min wait (ns)");
717
718         pr_info("\n\n");
719
720         bad = total = 0;
721         while ((st = pop_from_result())) {
722                 total++;
723                 if (st->discard) {
724                         bad++;
725                         continue;
726                 }
727                 bzero(cut_name, 20);
728
729                 if (strlen(st->name) < 16) {
730                         /* output raw name */
731                         pr_info("%20s ", st->name);
732                 } else {
733                         strncpy(cut_name, st->name, 16);
734                         cut_name[16] = '.';
735                         cut_name[17] = '.';
736                         cut_name[18] = '.';
737                         cut_name[19] = '\0';
738                         /* cut off name for saving output style */
739                         pr_info("%20s ", cut_name);
740                 }
741
742                 pr_info("%10u ", st->nr_acquired);
743                 pr_info("%10u ", st->nr_contended);
744
745                 pr_info("%15" PRIu64 " ", st->avg_wait_time);
746                 pr_info("%15" PRIu64 " ", st->wait_time_total);
747                 pr_info("%15" PRIu64 " ", st->wait_time_max);
748                 pr_info("%15" PRIu64 " ", st->wait_time_min == ULLONG_MAX ?
749                        0 : st->wait_time_min);
750                 pr_info("\n");
751         }
752
753         print_bad_events(bad, total);
754 }
755
756 static bool info_threads, info_map;
757
758 static void dump_threads(void)
759 {
760         struct thread_stat *st;
761         struct rb_node *node;
762         struct thread *t;
763
764         pr_info("%10s: comm\n", "Thread ID");
765
766         node = rb_first(&thread_stats);
767         while (node) {
768                 st = container_of(node, struct thread_stat, rb);
769                 t = perf_session__findnew(session, st->tid);
770                 pr_info("%10d: %s\n", st->tid, thread__comm_str(t));
771                 node = rb_next(node);
772         };
773 }
774
775 static void dump_map(void)
776 {
777         unsigned int i;
778         struct lock_stat *st;
779
780         pr_info("Address of instance: name of class\n");
781         for (i = 0; i < LOCKHASH_SIZE; i++) {
782                 list_for_each_entry(st, &lockhash_table[i], hash_entry) {
783                         pr_info(" %p: %s\n", st->addr, st->name);
784                 }
785         }
786 }
787
788 static int dump_info(void)
789 {
790         int rc = 0;
791
792         if (info_threads)
793                 dump_threads();
794         else if (info_map)
795                 dump_map();
796         else {
797                 rc = -1;
798                 pr_err("Unknown type of information\n");
799         }
800
801         return rc;
802 }
803
804 typedef int (*tracepoint_handler)(struct perf_evsel *evsel,
805                                   struct perf_sample *sample);
806
807 static int process_sample_event(struct perf_tool *tool __maybe_unused,
808                                 union perf_event *event,
809                                 struct perf_sample *sample,
810                                 struct perf_evsel *evsel,
811                                 struct machine *machine)
812 {
813         struct thread *thread = machine__findnew_thread(machine, sample->pid,
814                                                         sample->tid);
815
816         if (thread == NULL) {
817                 pr_debug("problem processing %d event, skipping it.\n",
818                         event->header.type);
819                 return -1;
820         }
821
822         if (evsel->handler != NULL) {
823                 tracepoint_handler f = evsel->handler;
824                 return f(evsel, sample);
825         }
826
827         return 0;
828 }
829
830 static void sort_result(void)
831 {
832         unsigned int i;
833         struct lock_stat *st;
834
835         for (i = 0; i < LOCKHASH_SIZE; i++) {
836                 list_for_each_entry(st, &lockhash_table[i], hash_entry) {
837                         insert_to_result(st, compare);
838                 }
839         }
840 }
841
842 static const struct perf_evsel_str_handler lock_tracepoints[] = {
843         { "lock:lock_acquire",   perf_evsel__process_lock_acquire,   }, /* CONFIG_LOCKDEP */
844         { "lock:lock_acquired",  perf_evsel__process_lock_acquired,  }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
845         { "lock:lock_contended", perf_evsel__process_lock_contended, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
846         { "lock:lock_release",   perf_evsel__process_lock_release,   }, /* CONFIG_LOCKDEP */
847 };
848
849 static int __cmd_report(bool display_info)
850 {
851         int err = -EINVAL;
852         struct perf_tool eops = {
853                 .sample          = process_sample_event,
854                 .comm            = perf_event__process_comm,
855                 .ordered_samples = true,
856         };
857         struct perf_data_file file = {
858                 .path = input_name,
859                 .mode = PERF_DATA_MODE_READ,
860         };
861
862         session = perf_session__new(&file, false, &eops);
863         if (!session) {
864                 pr_err("Initializing perf session failed\n");
865                 return -ENOMEM;
866         }
867
868         if (!perf_session__has_traces(session, "lock record"))
869                 goto out_delete;
870
871         if (perf_session__set_tracepoints_handlers(session, lock_tracepoints)) {
872                 pr_err("Initializing perf session tracepoint handlers failed\n");
873                 goto out_delete;
874         }
875
876         if (select_key())
877                 goto out_delete;
878
879         err = perf_session__process_events(session, &eops);
880         if (err)
881                 goto out_delete;
882
883         setup_pager();
884         if (display_info) /* used for info subcommand */
885                 err = dump_info();
886         else {
887                 sort_result();
888                 print_result();
889         }
890
891 out_delete:
892         perf_session__delete(session);
893         return err;
894 }
895
896 static int __cmd_record(int argc, const char **argv)
897 {
898         const char *record_args[] = {
899                 "record", "-R", "-m", "1024", "-c", "1",
900         };
901         unsigned int rec_argc, i, j, ret;
902         const char **rec_argv;
903
904         for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) {
905                 if (!is_valid_tracepoint(lock_tracepoints[i].name)) {
906                                 pr_err("tracepoint %s is not enabled. "
907                                        "Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?\n",
908                                        lock_tracepoints[i].name);
909                                 return 1;
910                 }
911         }
912
913         rec_argc = ARRAY_SIZE(record_args) + argc - 1;
914         /* factor of 2 is for -e in front of each tracepoint */
915         rec_argc += 2 * ARRAY_SIZE(lock_tracepoints);
916
917         rec_argv = calloc(rec_argc + 1, sizeof(char *));
918         if (!rec_argv)
919                 return -ENOMEM;
920
921         for (i = 0; i < ARRAY_SIZE(record_args); i++)
922                 rec_argv[i] = strdup(record_args[i]);
923
924         for (j = 0; j < ARRAY_SIZE(lock_tracepoints); j++) {
925                 rec_argv[i++] = "-e";
926                 rec_argv[i++] = strdup(lock_tracepoints[j].name);
927         }
928
929         for (j = 1; j < (unsigned int)argc; j++, i++)
930                 rec_argv[i] = argv[j];
931
932         BUG_ON(i != rec_argc);
933
934         ret = cmd_record(i, rec_argv, NULL);
935         free(rec_argv);
936         return ret;
937 }
938
939 int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
940 {
941         const struct option info_options[] = {
942         OPT_BOOLEAN('t', "threads", &info_threads,
943                     "dump thread list in perf.data"),
944         OPT_BOOLEAN('m', "map", &info_map,
945                     "map of lock instances (address:name table)"),
946         OPT_END()
947         };
948         const struct option lock_options[] = {
949         OPT_STRING('i', "input", &input_name, "file", "input file name"),
950         OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"),
951         OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"),
952         OPT_END()
953         };
954         const struct option report_options[] = {
955         OPT_STRING('k', "key", &sort_key, "acquired",
956                     "key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"),
957         /* TODO: type */
958         OPT_END()
959         };
960         const char * const info_usage[] = {
961                 "perf lock info [<options>]",
962                 NULL
963         };
964         const char *const lock_subcommands[] = { "record", "report", "script",
965                                                  "info", NULL };
966         const char *lock_usage[] = {
967                 NULL,
968                 NULL
969         };
970         const char * const report_usage[] = {
971                 "perf lock report [<options>]",
972                 NULL
973         };
974         unsigned int i;
975         int rc = 0;
976
977         symbol__init();
978         for (i = 0; i < LOCKHASH_SIZE; i++)
979                 INIT_LIST_HEAD(lockhash_table + i);
980
981         argc = parse_options_subcommand(argc, argv, lock_options, lock_subcommands,
982                                         lock_usage, PARSE_OPT_STOP_AT_NON_OPTION);
983         if (!argc)
984                 usage_with_options(lock_usage, lock_options);
985
986         if (!strncmp(argv[0], "rec", 3)) {
987                 return __cmd_record(argc, argv);
988         } else if (!strncmp(argv[0], "report", 6)) {
989                 trace_handler = &report_lock_ops;
990                 if (argc) {
991                         argc = parse_options(argc, argv,
992                                              report_options, report_usage, 0);
993                         if (argc)
994                                 usage_with_options(report_usage, report_options);
995                 }
996                 rc = __cmd_report(false);
997         } else if (!strcmp(argv[0], "script")) {
998                 /* Aliased to 'perf script' */
999                 return cmd_script(argc, argv, prefix);
1000         } else if (!strcmp(argv[0], "info")) {
1001                 if (argc) {
1002                         argc = parse_options(argc, argv,
1003                                              info_options, info_usage, 0);
1004                         if (argc)
1005                                 usage_with_options(info_usage, info_options);
1006                 }
1007                 /* recycling report_lock_ops */
1008                 trace_handler = &report_lock_ops;
1009                 rc = __cmd_report(true);
1010         } else {
1011                 usage_with_options(lock_usage, lock_options);
1012         }
1013
1014         return rc;
1015 }