#include "builtin.h" #include "perf.h" #include "util/evlist.h" #include "util/evsel.h" #include "util/util.h" #include "util/cache.h" #include "util/symbol.h" #include "util/thread.h" #include "util/header.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> 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 perf_evsel *evsel, struct perf_sample *sample); int (*acquired_event)(struct perf_evsel *evsel, struct perf_sample *sample); int (*contended_event)(struct perf_evsel *evsel, struct perf_sample *sample); int (*release_event)(struct perf_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 perf_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(&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 perf_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(&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 perf_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(&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 perf_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(&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 perf_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 perf_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 perf_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 perf_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 perf_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 perf_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 perf_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, .ordered_events = true, }; struct perf_data_file file = { .path = input_name, .mode = PERF_DATA_MODE_READ, .force = force, }; session = perf_session__new(&file, false, &eops); if (!session) { pr_err("Initializing perf session failed\n"); return -1; } 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, NULL); free(rec_argv); return ret; } int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused) { 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_BOOLEAN('f', "force", &force, "don't complain, do it"), OPT_END() }; 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_END() }; 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)"), OPT_BOOLEAN('f', "force", &force, "don't complain, do it"), /* TODO: type */ OPT_END() }; 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, prefix); } 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; }