| // SPDX-License-Identifier: GPL-2.0 |
| #include <errno.h> |
| #include <inttypes.h> |
| #include "builtin.h" |
| #include "perf.h" |
| |
| #include "util/evlist.h" // for struct evsel_str_handler |
| #include "util/evsel.h" |
| #include "util/symbol.h" |
| #include "util/thread.h" |
| #include "util/header.h" |
| |
| #include <subcmd/pager.h> |
| #include <subcmd/parse-options.h> |
| #include "util/trace-event.h" |
| |
| #include "util/debug.h" |
| #include "util/session.h" |
| #include "util/tool.h" |
| #include "util/data.h" |
| |
| #include <sys/types.h> |
| #include <sys/prctl.h> |
| #include <semaphore.h> |
| #include <pthread.h> |
| #include <math.h> |
| #include <limits.h> |
| |
| #include <linux/list.h> |
| #include <linux/hash.h> |
| #include <linux/kernel.h> |
| #include <linux/zalloc.h> |
| #include <linux/err.h> |
| |
| static struct perf_session *session; |
| |
| /* based on kernel/lockdep.c */ |
| #define LOCKHASH_BITS 12 |
| #define LOCKHASH_SIZE (1UL << LOCKHASH_BITS) |
| |
| static struct list_head lockhash_table[LOCKHASH_SIZE]; |
| |
| #define __lockhashfn(key) hash_long((unsigned long)key, LOCKHASH_BITS) |
| #define lockhashentry(key) (lockhash_table + __lockhashfn((key))) |
| |
| struct lock_stat { |
| struct list_head hash_entry; |
| struct rb_node rb; /* used for sorting */ |
| |
| /* |
| * FIXME: perf_evsel__intval() returns u64, |
| * so address of lockdep_map should be dealed as 64bit. |
| * Is there more better solution? |
| */ |
| void *addr; /* address of lockdep_map, used as ID */ |
| char *name; /* for strcpy(), we cannot use const */ |
| |
| unsigned int nr_acquire; |
| unsigned int nr_acquired; |
| unsigned int nr_contended; |
| unsigned int nr_release; |
| |
| unsigned int nr_readlock; |
| unsigned int nr_trylock; |
| |
| /* these times are in nano sec. */ |
| u64 avg_wait_time; |
| u64 wait_time_total; |
| u64 wait_time_min; |
| u64 wait_time_max; |
| |
| int discard; /* flag of blacklist */ |
| }; |
| |
| /* |
| * States of lock_seq_stat |
| * |
| * UNINITIALIZED is required for detecting first event of acquire. |
| * As the nature of lock events, there is no guarantee |
| * that the first event for the locks are acquire, |
| * it can be acquired, contended or release. |
| */ |
| #define SEQ_STATE_UNINITIALIZED 0 /* initial state */ |
| #define SEQ_STATE_RELEASED 1 |
| #define SEQ_STATE_ACQUIRING 2 |
| #define SEQ_STATE_ACQUIRED 3 |
| #define SEQ_STATE_READ_ACQUIRED 4 |
| #define SEQ_STATE_CONTENDED 5 |
| |
| /* |
| * MAX_LOCK_DEPTH |
| * Imported from include/linux/sched.h. |
| * Should this be synchronized? |
| */ |
| #define MAX_LOCK_DEPTH 48 |
| |
| /* |
| * struct lock_seq_stat: |
| * Place to put on state of one lock sequence |
| * 1) acquire -> acquired -> release |
| * 2) acquire -> contended -> acquired -> release |
| * 3) acquire (with read or try) -> release |
| * 4) Are there other patterns? |
| */ |
| struct lock_seq_stat { |
| struct list_head list; |
| int state; |
| u64 prev_event_time; |
| void *addr; |
| |
| int read_count; |
| }; |
| |
| struct thread_stat { |
| struct rb_node rb; |
| |
| u32 tid; |
| struct list_head seq_list; |
| }; |
| |
| static struct rb_root thread_stats; |
| |
| static struct thread_stat *thread_stat_find(u32 tid) |
| { |
| struct rb_node *node; |
| struct thread_stat *st; |
| |
| node = thread_stats.rb_node; |
| while (node) { |
| st = container_of(node, struct thread_stat, rb); |
| if (st->tid == tid) |
| return st; |
| else if (tid < st->tid) |
| node = node->rb_left; |
| else |
| node = node->rb_right; |
| } |
| |
| return NULL; |
| } |
| |
| static void thread_stat_insert(struct thread_stat *new) |
| { |
| struct rb_node **rb = &thread_stats.rb_node; |
| struct rb_node *parent = NULL; |
| struct thread_stat *p; |
| |
| while (*rb) { |
| p = container_of(*rb, struct thread_stat, rb); |
| parent = *rb; |
| |
| if (new->tid < p->tid) |
| rb = &(*rb)->rb_left; |
| else if (new->tid > p->tid) |
| rb = &(*rb)->rb_right; |
| else |
| BUG_ON("inserting invalid thread_stat\n"); |
| } |
| |
| rb_link_node(&new->rb, parent, rb); |
| rb_insert_color(&new->rb, &thread_stats); |
| } |
| |
| static struct thread_stat *thread_stat_findnew_after_first(u32 tid) |
| { |
| struct thread_stat *st; |
| |
| st = thread_stat_find(tid); |
| if (st) |
| return st; |
| |
| st = zalloc(sizeof(struct thread_stat)); |
| if (!st) { |
| pr_err("memory allocation failed\n"); |
| return NULL; |
| } |
| |
| st->tid = tid; |
| INIT_LIST_HEAD(&st->seq_list); |
| |
| thread_stat_insert(st); |
| |
| return st; |
| } |
| |
| static struct thread_stat *thread_stat_findnew_first(u32 tid); |
| static struct thread_stat *(*thread_stat_findnew)(u32 tid) = |
| thread_stat_findnew_first; |
| |
| static struct thread_stat *thread_stat_findnew_first(u32 tid) |
| { |
| struct thread_stat *st; |
| |
| st = zalloc(sizeof(struct thread_stat)); |
| if (!st) { |
| pr_err("memory allocation failed\n"); |
| return NULL; |
| } |
| st->tid = tid; |
| INIT_LIST_HEAD(&st->seq_list); |
| |
| rb_link_node(&st->rb, NULL, &thread_stats.rb_node); |
| rb_insert_color(&st->rb, &thread_stats); |
| |
| thread_stat_findnew = thread_stat_findnew_after_first; |
| return st; |
| } |
| |
| /* build simple key function one is bigger than two */ |
| #define SINGLE_KEY(member) \ |
| static int lock_stat_key_ ## member(struct lock_stat *one, \ |
| struct lock_stat *two) \ |
| { \ |
| return one->member > two->member; \ |
| } |
| |
| SINGLE_KEY(nr_acquired) |
| SINGLE_KEY(nr_contended) |
| SINGLE_KEY(avg_wait_time) |
| SINGLE_KEY(wait_time_total) |
| SINGLE_KEY(wait_time_max) |
| |
| static int lock_stat_key_wait_time_min(struct lock_stat *one, |
| struct lock_stat *two) |
| { |
| u64 s1 = one->wait_time_min; |
| u64 s2 = two->wait_time_min; |
| if (s1 == ULLONG_MAX) |
| s1 = 0; |
| if (s2 == ULLONG_MAX) |
| s2 = 0; |
| return s1 > s2; |
| } |
| |
| struct lock_key { |
| /* |
| * name: the value for specify by user |
| * this should be simpler than raw name of member |
| * e.g. nr_acquired -> acquired, wait_time_total -> wait_total |
| */ |
| const char *name; |
| int (*key)(struct lock_stat*, struct lock_stat*); |
| }; |
| |
| static const char *sort_key = "acquired"; |
| |
| static int (*compare)(struct lock_stat *, struct lock_stat *); |
| |
| static struct rb_root result; /* place to store sorted data */ |
| |
| #define DEF_KEY_LOCK(name, fn_suffix) \ |
| { #name, lock_stat_key_ ## fn_suffix } |
| struct lock_key keys[] = { |
| DEF_KEY_LOCK(acquired, nr_acquired), |
| DEF_KEY_LOCK(contended, nr_contended), |
| DEF_KEY_LOCK(avg_wait, avg_wait_time), |
| DEF_KEY_LOCK(wait_total, wait_time_total), |
| DEF_KEY_LOCK(wait_min, wait_time_min), |
| DEF_KEY_LOCK(wait_max, wait_time_max), |
| |
| /* extra comparisons much complicated should be here */ |
| |
| { NULL, NULL } |
| }; |
| |
| static int select_key(void) |
| { |
| int i; |
| |
| for (i = 0; keys[i].name; i++) { |
| if (!strcmp(keys[i].name, sort_key)) { |
| compare = keys[i].key; |
| return 0; |
| } |
| } |
| |
| pr_err("Unknown compare key: %s\n", sort_key); |
| |
| return -1; |
| } |
| |
| static void insert_to_result(struct lock_stat *st, |
| int (*bigger)(struct lock_stat *, struct lock_stat *)) |
| { |
| struct rb_node **rb = &result.rb_node; |
| struct rb_node *parent = NULL; |
| struct lock_stat *p; |
| |
| while (*rb) { |
| p = container_of(*rb, struct lock_stat, rb); |
| parent = *rb; |
| |
| if (bigger(st, p)) |
| rb = &(*rb)->rb_left; |
| else |
| rb = &(*rb)->rb_right; |
| } |
| |
| rb_link_node(&st->rb, parent, rb); |
| rb_insert_color(&st->rb, &result); |
| } |
| |
| /* returns left most element of result, and erase it */ |
| static struct lock_stat *pop_from_result(void) |
| { |
| struct rb_node *node = result.rb_node; |
| |
| if (!node) |
| return NULL; |
| |
| while (node->rb_left) |
| node = node->rb_left; |
| |
| rb_erase(node, &result); |
| return container_of(node, struct lock_stat, rb); |
| } |
| |
| static struct lock_stat *lock_stat_findnew(void *addr, const char *name) |
| { |
| struct list_head *entry = lockhashentry(addr); |
| struct lock_stat *ret, *new; |
| |
| list_for_each_entry(ret, entry, hash_entry) { |
| if (ret->addr == addr) |
| return ret; |
| } |
| |
| new = zalloc(sizeof(struct lock_stat)); |
| if (!new) |
| goto alloc_failed; |
| |
| new->addr = addr; |
| new->name = zalloc(sizeof(char) * strlen(name) + 1); |
| if (!new->name) { |
| free(new); |
| goto alloc_failed; |
| } |
| |
| strcpy(new->name, name); |
| new->wait_time_min = ULLONG_MAX; |
| |
| list_add(&new->hash_entry, entry); |
| return new; |
| |
| alloc_failed: |
| pr_err("memory allocation failed\n"); |
| return NULL; |
| } |
| |
| struct trace_lock_handler { |
| int (*acquire_event)(struct evsel *evsel, |
| struct perf_sample *sample); |
| |
| int (*acquired_event)(struct evsel *evsel, |
| struct perf_sample *sample); |
| |
| int (*contended_event)(struct evsel *evsel, |
| struct perf_sample *sample); |
| |
| int (*release_event)(struct evsel *evsel, |
| struct perf_sample *sample); |
| }; |
| |
| static struct lock_seq_stat *get_seq(struct thread_stat *ts, void *addr) |
| { |
| struct lock_seq_stat *seq; |
| |
| list_for_each_entry(seq, &ts->seq_list, list) { |
| if (seq->addr == addr) |
| return seq; |
| } |
| |
| seq = zalloc(sizeof(struct lock_seq_stat)); |
| if (!seq) { |
| pr_err("memory allocation failed\n"); |
| return NULL; |
| } |
| seq->state = SEQ_STATE_UNINITIALIZED; |
| seq->addr = addr; |
| |
| list_add(&seq->list, &ts->seq_list); |
| return seq; |
| } |
| |
| enum broken_state { |
| BROKEN_ACQUIRE, |
| BROKEN_ACQUIRED, |
| BROKEN_CONTENDED, |
| BROKEN_RELEASE, |
| BROKEN_MAX, |
| }; |
| |
| static int bad_hist[BROKEN_MAX]; |
| |
| enum acquire_flags { |
| TRY_LOCK = 1, |
| READ_LOCK = 2, |
| }; |
| |
| static int report_lock_acquire_event(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| void *addr; |
| struct lock_stat *ls; |
| struct thread_stat *ts; |
| struct lock_seq_stat *seq; |
| const char *name = perf_evsel__strval(evsel, sample, "name"); |
| u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); |
| int flag = perf_evsel__intval(evsel, sample, "flag"); |
| |
| memcpy(&addr, &tmp, sizeof(void *)); |
| |
| ls = lock_stat_findnew(addr, name); |
| if (!ls) |
| return -ENOMEM; |
| if (ls->discard) |
| return 0; |
| |
| ts = thread_stat_findnew(sample->tid); |
| if (!ts) |
| return -ENOMEM; |
| |
| seq = get_seq(ts, addr); |
| if (!seq) |
| return -ENOMEM; |
| |
| switch (seq->state) { |
| case SEQ_STATE_UNINITIALIZED: |
| case SEQ_STATE_RELEASED: |
| if (!flag) { |
| seq->state = SEQ_STATE_ACQUIRING; |
| } else { |
| if (flag & TRY_LOCK) |
| ls->nr_trylock++; |
| if (flag & READ_LOCK) |
| ls->nr_readlock++; |
| seq->state = SEQ_STATE_READ_ACQUIRED; |
| seq->read_count = 1; |
| ls->nr_acquired++; |
| } |
| break; |
| case SEQ_STATE_READ_ACQUIRED: |
| if (flag & READ_LOCK) { |
| seq->read_count++; |
| ls->nr_acquired++; |
| goto end; |
| } else { |
| goto broken; |
| } |
| break; |
| case SEQ_STATE_ACQUIRED: |
| case SEQ_STATE_ACQUIRING: |
| case SEQ_STATE_CONTENDED: |
| broken: |
| /* broken lock sequence, discard it */ |
| ls->discard = 1; |
| bad_hist[BROKEN_ACQUIRE]++; |
| list_del_init(&seq->list); |
| free(seq); |
| goto end; |
| default: |
| BUG_ON("Unknown state of lock sequence found!\n"); |
| break; |
| } |
| |
| ls->nr_acquire++; |
| seq->prev_event_time = sample->time; |
| end: |
| return 0; |
| } |
| |
| static int report_lock_acquired_event(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| void *addr; |
| struct lock_stat *ls; |
| struct thread_stat *ts; |
| struct lock_seq_stat *seq; |
| u64 contended_term; |
| const char *name = perf_evsel__strval(evsel, sample, "name"); |
| u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); |
| |
| memcpy(&addr, &tmp, sizeof(void *)); |
| |
| ls = lock_stat_findnew(addr, name); |
| if (!ls) |
| return -ENOMEM; |
| if (ls->discard) |
| return 0; |
| |
| ts = thread_stat_findnew(sample->tid); |
| if (!ts) |
| return -ENOMEM; |
| |
| seq = get_seq(ts, addr); |
| if (!seq) |
| return -ENOMEM; |
| |
| switch (seq->state) { |
| case SEQ_STATE_UNINITIALIZED: |
| /* orphan event, do nothing */ |
| return 0; |
| case SEQ_STATE_ACQUIRING: |
| break; |
| case SEQ_STATE_CONTENDED: |
| contended_term = sample->time - seq->prev_event_time; |
| ls->wait_time_total += contended_term; |
| if (contended_term < ls->wait_time_min) |
| ls->wait_time_min = contended_term; |
| if (ls->wait_time_max < contended_term) |
| ls->wait_time_max = contended_term; |
| break; |
| case SEQ_STATE_RELEASED: |
| case SEQ_STATE_ACQUIRED: |
| case SEQ_STATE_READ_ACQUIRED: |
| /* broken lock sequence, discard it */ |
| ls->discard = 1; |
| bad_hist[BROKEN_ACQUIRED]++; |
| list_del_init(&seq->list); |
| free(seq); |
| goto end; |
| default: |
| BUG_ON("Unknown state of lock sequence found!\n"); |
| break; |
| } |
| |
| seq->state = SEQ_STATE_ACQUIRED; |
| ls->nr_acquired++; |
| ls->avg_wait_time = ls->nr_contended ? ls->wait_time_total/ls->nr_contended : 0; |
| seq->prev_event_time = sample->time; |
| end: |
| return 0; |
| } |
| |
| static int report_lock_contended_event(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| void *addr; |
| struct lock_stat *ls; |
| struct thread_stat *ts; |
| struct lock_seq_stat *seq; |
| const char *name = perf_evsel__strval(evsel, sample, "name"); |
| u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); |
| |
| memcpy(&addr, &tmp, sizeof(void *)); |
| |
| ls = lock_stat_findnew(addr, name); |
| if (!ls) |
| return -ENOMEM; |
| if (ls->discard) |
| return 0; |
| |
| ts = thread_stat_findnew(sample->tid); |
| if (!ts) |
| return -ENOMEM; |
| |
| seq = get_seq(ts, addr); |
| if (!seq) |
| return -ENOMEM; |
| |
| switch (seq->state) { |
| case SEQ_STATE_UNINITIALIZED: |
| /* orphan event, do nothing */ |
| return 0; |
| case SEQ_STATE_ACQUIRING: |
| break; |
| case SEQ_STATE_RELEASED: |
| case SEQ_STATE_ACQUIRED: |
| case SEQ_STATE_READ_ACQUIRED: |
| case SEQ_STATE_CONTENDED: |
| /* broken lock sequence, discard it */ |
| ls->discard = 1; |
| bad_hist[BROKEN_CONTENDED]++; |
| list_del_init(&seq->list); |
| free(seq); |
| goto end; |
| default: |
| BUG_ON("Unknown state of lock sequence found!\n"); |
| break; |
| } |
| |
| seq->state = SEQ_STATE_CONTENDED; |
| ls->nr_contended++; |
| ls->avg_wait_time = ls->wait_time_total/ls->nr_contended; |
| seq->prev_event_time = sample->time; |
| end: |
| return 0; |
| } |
| |
| static int report_lock_release_event(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| void *addr; |
| struct lock_stat *ls; |
| struct thread_stat *ts; |
| struct lock_seq_stat *seq; |
| const char *name = perf_evsel__strval(evsel, sample, "name"); |
| u64 tmp = perf_evsel__intval(evsel, sample, "lockdep_addr"); |
| |
| memcpy(&addr, &tmp, sizeof(void *)); |
| |
| ls = lock_stat_findnew(addr, name); |
| if (!ls) |
| return -ENOMEM; |
| if (ls->discard) |
| return 0; |
| |
| ts = thread_stat_findnew(sample->tid); |
| if (!ts) |
| return -ENOMEM; |
| |
| seq = get_seq(ts, addr); |
| if (!seq) |
| return -ENOMEM; |
| |
| switch (seq->state) { |
| case SEQ_STATE_UNINITIALIZED: |
| goto end; |
| case SEQ_STATE_ACQUIRED: |
| break; |
| case SEQ_STATE_READ_ACQUIRED: |
| seq->read_count--; |
| BUG_ON(seq->read_count < 0); |
| if (seq->read_count) { |
| ls->nr_release++; |
| goto end; |
| } |
| break; |
| case SEQ_STATE_ACQUIRING: |
| case SEQ_STATE_CONTENDED: |
| case SEQ_STATE_RELEASED: |
| /* broken lock sequence, discard it */ |
| ls->discard = 1; |
| bad_hist[BROKEN_RELEASE]++; |
| goto free_seq; |
| default: |
| BUG_ON("Unknown state of lock sequence found!\n"); |
| break; |
| } |
| |
| ls->nr_release++; |
| free_seq: |
| list_del_init(&seq->list); |
| free(seq); |
| end: |
| return 0; |
| } |
| |
| /* lock oriented handlers */ |
| /* TODO: handlers for CPU oriented, thread oriented */ |
| static struct trace_lock_handler report_lock_ops = { |
| .acquire_event = report_lock_acquire_event, |
| .acquired_event = report_lock_acquired_event, |
| .contended_event = report_lock_contended_event, |
| .release_event = report_lock_release_event, |
| }; |
| |
| static struct trace_lock_handler *trace_handler; |
| |
| static int perf_evsel__process_lock_acquire(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| if (trace_handler->acquire_event) |
| return trace_handler->acquire_event(evsel, sample); |
| return 0; |
| } |
| |
| static int perf_evsel__process_lock_acquired(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| if (trace_handler->acquired_event) |
| return trace_handler->acquired_event(evsel, sample); |
| return 0; |
| } |
| |
| static int perf_evsel__process_lock_contended(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| if (trace_handler->contended_event) |
| return trace_handler->contended_event(evsel, sample); |
| return 0; |
| } |
| |
| static int perf_evsel__process_lock_release(struct evsel *evsel, |
| struct perf_sample *sample) |
| { |
| if (trace_handler->release_event) |
| return trace_handler->release_event(evsel, sample); |
| return 0; |
| } |
| |
| static void print_bad_events(int bad, int total) |
| { |
| /* Output for debug, this have to be removed */ |
| int i; |
| const char *name[4] = |
| { "acquire", "acquired", "contended", "release" }; |
| |
| pr_info("\n=== output for debug===\n\n"); |
| pr_info("bad: %d, total: %d\n", bad, total); |
| pr_info("bad rate: %.2f %%\n", (double)bad / (double)total * 100); |
| pr_info("histogram of events caused bad sequence\n"); |
| for (i = 0; i < BROKEN_MAX; i++) |
| pr_info(" %10s: %d\n", name[i], bad_hist[i]); |
| } |
| |
| /* TODO: various way to print, coloring, nano or milli sec */ |
| static void print_result(void) |
| { |
| struct lock_stat *st; |
| char cut_name[20]; |
| int bad, total; |
| |
| pr_info("%20s ", "Name"); |
| pr_info("%10s ", "acquired"); |
| pr_info("%10s ", "contended"); |
| |
| pr_info("%15s ", "avg wait (ns)"); |
| pr_info("%15s ", "total wait (ns)"); |
| pr_info("%15s ", "max wait (ns)"); |
| pr_info("%15s ", "min wait (ns)"); |
| |
| pr_info("\n\n"); |
| |
| bad = total = 0; |
| while ((st = pop_from_result())) { |
| total++; |
| if (st->discard) { |
| bad++; |
| continue; |
| } |
| bzero(cut_name, 20); |
| |
| if (strlen(st->name) < 16) { |
| /* output raw name */ |
| pr_info("%20s ", st->name); |
| } else { |
| strncpy(cut_name, st->name, 16); |
| cut_name[16] = '.'; |
| cut_name[17] = '.'; |
| cut_name[18] = '.'; |
| cut_name[19] = '\0'; |
| /* cut off name for saving output style */ |
| pr_info("%20s ", cut_name); |
| } |
| |
| pr_info("%10u ", st->nr_acquired); |
| pr_info("%10u ", st->nr_contended); |
| |
| pr_info("%15" PRIu64 " ", st->avg_wait_time); |
| pr_info("%15" PRIu64 " ", st->wait_time_total); |
| pr_info("%15" PRIu64 " ", st->wait_time_max); |
| pr_info("%15" PRIu64 " ", st->wait_time_min == ULLONG_MAX ? |
| 0 : st->wait_time_min); |
| pr_info("\n"); |
| } |
| |
| print_bad_events(bad, total); |
| } |
| |
| static bool info_threads, info_map; |
| |
| static void dump_threads(void) |
| { |
| struct thread_stat *st; |
| struct rb_node *node; |
| struct thread *t; |
| |
| pr_info("%10s: comm\n", "Thread ID"); |
| |
| node = rb_first(&thread_stats); |
| while (node) { |
| st = container_of(node, struct thread_stat, rb); |
| t = perf_session__findnew(session, st->tid); |
| pr_info("%10d: %s\n", st->tid, thread__comm_str(t)); |
| node = rb_next(node); |
| thread__put(t); |
| }; |
| } |
| |
| static void dump_map(void) |
| { |
| unsigned int i; |
| struct lock_stat *st; |
| |
| pr_info("Address of instance: name of class\n"); |
| for (i = 0; i < LOCKHASH_SIZE; i++) { |
| list_for_each_entry(st, &lockhash_table[i], hash_entry) { |
| pr_info(" %p: %s\n", st->addr, st->name); |
| } |
| } |
| } |
| |
| static int dump_info(void) |
| { |
| int rc = 0; |
| |
| if (info_threads) |
| dump_threads(); |
| else if (info_map) |
| dump_map(); |
| else { |
| rc = -1; |
| pr_err("Unknown type of information\n"); |
| } |
| |
| return rc; |
| } |
| |
| typedef int (*tracepoint_handler)(struct evsel *evsel, |
| struct perf_sample *sample); |
| |
| static int process_sample_event(struct perf_tool *tool __maybe_unused, |
| union perf_event *event, |
| struct perf_sample *sample, |
| struct evsel *evsel, |
| struct machine *machine) |
| { |
| int err = 0; |
| struct thread *thread = machine__findnew_thread(machine, sample->pid, |
| sample->tid); |
| |
| if (thread == NULL) { |
| pr_debug("problem processing %d event, skipping it.\n", |
| event->header.type); |
| return -1; |
| } |
| |
| if (evsel->handler != NULL) { |
| tracepoint_handler f = evsel->handler; |
| err = f(evsel, sample); |
| } |
| |
| thread__put(thread); |
| |
| return err; |
| } |
| |
| static void sort_result(void) |
| { |
| unsigned int i; |
| struct lock_stat *st; |
| |
| for (i = 0; i < LOCKHASH_SIZE; i++) { |
| list_for_each_entry(st, &lockhash_table[i], hash_entry) { |
| insert_to_result(st, compare); |
| } |
| } |
| } |
| |
| static const struct evsel_str_handler lock_tracepoints[] = { |
| { "lock:lock_acquire", perf_evsel__process_lock_acquire, }, /* CONFIG_LOCKDEP */ |
| { "lock:lock_acquired", perf_evsel__process_lock_acquired, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */ |
| { "lock:lock_contended", perf_evsel__process_lock_contended, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */ |
| { "lock:lock_release", perf_evsel__process_lock_release, }, /* CONFIG_LOCKDEP */ |
| }; |
| |
| static bool force; |
| |
| static int __cmd_report(bool display_info) |
| { |
| int err = -EINVAL; |
| struct perf_tool eops = { |
| .sample = process_sample_event, |
| .comm = perf_event__process_comm, |
| .namespaces = perf_event__process_namespaces, |
| .ordered_events = true, |
| }; |
| struct perf_data data = { |
| .path = input_name, |
| .mode = PERF_DATA_MODE_READ, |
| .force = force, |
| }; |
| |
| session = perf_session__new(&data, false, &eops); |
| if (IS_ERR(session)) { |
| pr_err("Initializing perf session failed\n"); |
| return PTR_ERR(session); |
| } |
| |
| symbol__init(&session->header.env); |
| |
| if (!perf_session__has_traces(session, "lock record")) |
| goto out_delete; |
| |
| if (perf_session__set_tracepoints_handlers(session, lock_tracepoints)) { |
| pr_err("Initializing perf session tracepoint handlers failed\n"); |
| goto out_delete; |
| } |
| |
| if (select_key()) |
| goto out_delete; |
| |
| err = perf_session__process_events(session); |
| if (err) |
| goto out_delete; |
| |
| setup_pager(); |
| if (display_info) /* used for info subcommand */ |
| err = dump_info(); |
| else { |
| sort_result(); |
| print_result(); |
| } |
| |
| out_delete: |
| perf_session__delete(session); |
| return err; |
| } |
| |
| static int __cmd_record(int argc, const char **argv) |
| { |
| const char *record_args[] = { |
| "record", "-R", "-m", "1024", "-c", "1", |
| }; |
| unsigned int rec_argc, i, j, ret; |
| const char **rec_argv; |
| |
| for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) { |
| if (!is_valid_tracepoint(lock_tracepoints[i].name)) { |
| pr_err("tracepoint %s is not enabled. " |
| "Are CONFIG_LOCKDEP and CONFIG_LOCK_STAT enabled?\n", |
| lock_tracepoints[i].name); |
| return 1; |
| } |
| } |
| |
| rec_argc = ARRAY_SIZE(record_args) + argc - 1; |
| /* factor of 2 is for -e in front of each tracepoint */ |
| rec_argc += 2 * ARRAY_SIZE(lock_tracepoints); |
| |
| rec_argv = calloc(rec_argc + 1, sizeof(char *)); |
| if (!rec_argv) |
| return -ENOMEM; |
| |
| for (i = 0; i < ARRAY_SIZE(record_args); i++) |
| rec_argv[i] = strdup(record_args[i]); |
| |
| for (j = 0; j < ARRAY_SIZE(lock_tracepoints); j++) { |
| rec_argv[i++] = "-e"; |
| rec_argv[i++] = strdup(lock_tracepoints[j].name); |
| } |
| |
| for (j = 1; j < (unsigned int)argc; j++, i++) |
| rec_argv[i] = argv[j]; |
| |
| BUG_ON(i != rec_argc); |
| |
| ret = cmd_record(i, rec_argv); |
| free(rec_argv); |
| return ret; |
| } |
| |
| int cmd_lock(int argc, const char **argv) |
| { |
| const struct option lock_options[] = { |
| OPT_STRING('i', "input", &input_name, "file", "input file name"), |
| OPT_INCR('v', "verbose", &verbose, "be more verbose (show symbol address, etc)"), |
| OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace, "dump raw trace in ASCII"), |
| OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), |
| OPT_END() |
| }; |
| |
| const struct option info_options[] = { |
| OPT_BOOLEAN('t', "threads", &info_threads, |
| "dump thread list in perf.data"), |
| OPT_BOOLEAN('m', "map", &info_map, |
| "map of lock instances (address:name table)"), |
| OPT_PARENT(lock_options) |
| }; |
| |
| const struct option report_options[] = { |
| OPT_STRING('k', "key", &sort_key, "acquired", |
| "key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"), |
| /* TODO: type */ |
| OPT_PARENT(lock_options) |
| }; |
| |
| const char * const info_usage[] = { |
| "perf lock info [<options>]", |
| NULL |
| }; |
| const char *const lock_subcommands[] = { "record", "report", "script", |
| "info", NULL }; |
| const char *lock_usage[] = { |
| NULL, |
| NULL |
| }; |
| const char * const report_usage[] = { |
| "perf lock report [<options>]", |
| NULL |
| }; |
| unsigned int i; |
| int rc = 0; |
| |
| for (i = 0; i < LOCKHASH_SIZE; i++) |
| INIT_LIST_HEAD(lockhash_table + i); |
| |
| argc = parse_options_subcommand(argc, argv, lock_options, lock_subcommands, |
| lock_usage, PARSE_OPT_STOP_AT_NON_OPTION); |
| if (!argc) |
| usage_with_options(lock_usage, lock_options); |
| |
| if (!strncmp(argv[0], "rec", 3)) { |
| return __cmd_record(argc, argv); |
| } else if (!strncmp(argv[0], "report", 6)) { |
| trace_handler = &report_lock_ops; |
| if (argc) { |
| argc = parse_options(argc, argv, |
| report_options, report_usage, 0); |
| if (argc) |
| usage_with_options(report_usage, report_options); |
| } |
| rc = __cmd_report(false); |
| } else if (!strcmp(argv[0], "script")) { |
| /* Aliased to 'perf script' */ |
| return cmd_script(argc, argv); |
| } else if (!strcmp(argv[0], "info")) { |
| if (argc) { |
| argc = parse_options(argc, argv, |
| info_options, info_usage, 0); |
| if (argc) |
| usage_with_options(info_usage, info_options); |
| } |
| /* recycling report_lock_ops */ |
| trace_handler = &report_lock_ops; |
| rc = __cmd_report(true); |
| } else { |
| usage_with_options(lock_usage, lock_options); |
| } |
| |
| return rc; |
| } |