summaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-lock.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--tools/perf/builtin-lock.c1029
1 files changed, 1029 insertions, 0 deletions
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
new file mode 100644
index 000000000..a2f1e53f3
--- /dev/null
+++ b/tools/perf/builtin-lock.c
@@ -0,0 +1,1029 @@
+// 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: 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 = evsel__strval(evsel, sample, "name");
+ u64 tmp = evsel__intval(evsel, sample, "lockdep_addr");
+ int flag = evsel__intval(evsel, sample, "flags");
+
+ 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 = evsel__strval(evsel, sample, "name");
+ u64 tmp = 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 = evsel__strval(evsel, sample, "name");
+ u64 tmp = 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 = evsel__strval(evsel, sample, "name");
+ u64 tmp = 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 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 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 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 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", evsel__process_lock_acquire, }, /* CONFIG_LOCKDEP */
+ { "lock:lock_acquired", evsel__process_lock_acquired, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
+ { "lock:lock_contended", evsel__process_lock_contended, }, /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
+ { "lock:lock_release", 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-30 05:35:11 +0000