aboutsummaryrefslogtreecommitdiffstats
path: root/tools/perf/builtin-lock.c
diff options
context:
space:
mode:
Diffstat (limited to 'tools/perf/builtin-lock.c')
-rw-r--r--tools/perf/builtin-lock.c137
1 files changed, 76 insertions, 61 deletions
diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index ee33ba2f05dd..c852c7a85d32 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -15,6 +15,7 @@
#include "util/debug.h"
#include "util/session.h"
#include "util/tool.h"
+#include "util/data.h"
#include <sys/types.h>
#include <sys/prctl.h>
@@ -56,7 +57,9 @@ struct lock_stat {
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;
@@ -208,6 +211,7 @@ static struct thread_stat *thread_stat_findnew_first(u32 tid)
SINGLE_KEY(nr_acquired)
SINGLE_KEY(nr_contended)
+SINGLE_KEY(avg_wait_time)
SINGLE_KEY(wait_time_total)
SINGLE_KEY(wait_time_max)
@@ -244,6 +248,7 @@ static struct rb_root result; /* place to store sorted data */
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),
@@ -321,10 +326,12 @@ static struct lock_stat *lock_stat_findnew(void *addr, const char *name)
new->addr = addr;
new->name = zalloc(sizeof(char) * strlen(name) + 1);
- if (!new->name)
+ if (!new->name) {
+ free(new);
goto alloc_failed;
- strcpy(new->name, name);
+ }
+ strcpy(new->name, name);
new->wait_time_min = ULLONG_MAX;
list_add(&new->hash_entry, entry);
@@ -400,17 +407,17 @@ static int report_lock_acquire_event(struct perf_evsel *evsel,
ls = lock_stat_findnew(addr, name);
if (!ls)
- return -1;
+ return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
- return -1;
+ return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
- return -1;
+ return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
@@ -446,7 +453,6 @@ broken:
list_del(&seq->list);
free(seq);
goto end;
- break;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
@@ -473,17 +479,17 @@ static int report_lock_acquired_event(struct perf_evsel *evsel,
ls = lock_stat_findnew(addr, name);
if (!ls)
- return -1;
+ return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
- return -1;
+ return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
- return -1;
+ return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
@@ -508,8 +514,6 @@ static int report_lock_acquired_event(struct perf_evsel *evsel,
list_del(&seq->list);
free(seq);
goto end;
- break;
-
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
@@ -517,6 +521,7 @@ static int report_lock_acquired_event(struct perf_evsel *evsel,
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;
@@ -536,17 +541,17 @@ static int report_lock_contended_event(struct perf_evsel *evsel,
ls = lock_stat_findnew(addr, name);
if (!ls)
- return -1;
+ return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
- return -1;
+ return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
- return -1;
+ return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
@@ -564,7 +569,6 @@ static int report_lock_contended_event(struct perf_evsel *evsel,
list_del(&seq->list);
free(seq);
goto end;
- break;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
@@ -572,6 +576,7 @@ static int report_lock_contended_event(struct perf_evsel *evsel,
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;
@@ -591,22 +596,21 @@ static int report_lock_release_event(struct perf_evsel *evsel,
ls = lock_stat_findnew(addr, name);
if (!ls)
- return -1;
+ return -ENOMEM;
if (ls->discard)
return 0;
ts = thread_stat_findnew(sample->tid);
if (!ts)
- return -1;
+ return -ENOMEM;
seq = get_seq(ts, addr);
if (!seq)
- return -1;
+ return -ENOMEM;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
goto end;
- break;
case SEQ_STATE_ACQUIRED:
break;
case SEQ_STATE_READ_ACQUIRED:
@@ -624,7 +628,6 @@ static int report_lock_release_event(struct perf_evsel *evsel,
ls->discard = 1;
bad_hist[BROKEN_RELEASE]++;
goto free_seq;
- break;
default:
BUG_ON("Unknown state of lock sequence found!\n");
break;
@@ -690,7 +693,7 @@ static void print_bad_events(int bad, int total)
pr_info("\n=== output for debug===\n\n");
pr_info("bad: %d, total: %d\n", bad, total);
- pr_info("bad rate: %f %%\n", (double)bad / (double)total * 100);
+ 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]);
@@ -707,6 +710,7 @@ static void print_result(void)
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)");
@@ -738,6 +742,7 @@ static void print_result(void)
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 ?
@@ -762,7 +767,7 @@ static void dump_threads(void)
while (node) {
st = container_of(node, struct thread_stat, rb);
t = perf_session__findnew(session, st->tid);
- pr_info("%10d: %s\n", st->tid, t->comm);
+ pr_info("%10d: %s\n", st->tid, thread__comm_str(t));
node = rb_next(node);
};
}
@@ -814,14 +819,26 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
return -1;
}
- if (evsel->handler.func != NULL) {
- tracepoint_handler f = evsel->handler.func;
+ if (evsel->handler != NULL) {
+ tracepoint_handler f = evsel->handler;
return f(evsel, sample);
}
return 0;
}
+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 */
@@ -829,51 +846,51 @@ static const struct perf_evsel_str_handler lock_tracepoints[] = {
{ "lock:lock_release", perf_evsel__process_lock_release, }, /* CONFIG_LOCKDEP */
};
-static int read_events(void)
+static int __cmd_report(bool display_info)
{
+ int err = -EINVAL;
struct perf_tool eops = {
.sample = process_sample_event,
.comm = perf_event__process_comm,
.ordered_samples = true,
};
- session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
+ struct perf_data_file file = {
+ .path = input_name,
+ .mode = PERF_DATA_MODE_READ,
+ };
+
+ session = perf_session__new(&file, false, &eops);
if (!session) {
pr_err("Initializing perf session failed\n");
- return -1;
+ return -ENOMEM;
}
+ 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");
- return -1;
+ goto out_delete;
}
- return perf_session__process_events(session, &eops);
-}
-
-static void sort_result(void)
-{
- unsigned int i;
- struct lock_stat *st;
+ if (select_key())
+ goto out_delete;
- for (i = 0; i < LOCKHASH_SIZE; i++) {
- list_for_each_entry(st, &lockhash_table[i], hash_entry) {
- insert_to_result(st, compare);
- }
- }
-}
+ err = perf_session__process_events(session, &eops);
+ if (err)
+ goto out_delete;
-static int __cmd_report(void)
-{
setup_pager();
+ if (display_info) /* used for info subcommand */
+ err = dump_info();
+ else {
+ sort_result();
+ print_result();
+ }
- if ((select_key() != 0) ||
- (read_events() != 0))
- return -1;
-
- sort_result();
- print_result();
-
- return 0;
+out_delete:
+ perf_session__delete(session);
+ return err;
}
static int __cmd_record(int argc, const char **argv)
@@ -881,7 +898,7 @@ 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;
+ unsigned int rec_argc, i, j, ret;
const char **rec_argv;
for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) {
@@ -898,7 +915,7 @@ static int __cmd_record(int argc, const char **argv)
rec_argc += 2 * ARRAY_SIZE(lock_tracepoints);
rec_argv = calloc(rec_argc + 1, sizeof(char *));
- if (rec_argv == NULL)
+ if (!rec_argv)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(record_args); i++)
@@ -914,7 +931,9 @@ static int __cmd_record(int argc, const char **argv)
BUG_ON(i != rec_argc);
- return cmd_record(i, rec_argv, NULL);
+ 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)
@@ -934,7 +953,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
};
const struct option report_options[] = {
OPT_STRING('k', "key", &sort_key, "acquired",
- "key for sorting (acquired / contended / wait_total / wait_max / wait_min)"),
+ "key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"),
/* TODO: type */
OPT_END()
};
@@ -972,7 +991,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
if (argc)
usage_with_options(report_usage, report_options);
}
- __cmd_report();
+ rc = __cmd_report(false);
} else if (!strcmp(argv[0], "script")) {
/* Aliased to 'perf script' */
return cmd_script(argc, argv, prefix);
@@ -985,11 +1004,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
}
/* recycling report_lock_ops */
trace_handler = &report_lock_ops;
- setup_pager();
- if (read_events() != 0)
- rc = -1;
- else
- rc = dump_info();
+ rc = __cmd_report(true);
} else {
usage_with_options(lock_usage, lock_options);
}
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.