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perf lock: Use perf_evsel__intval and perf_session__set_tracepoints_handlers 

Following the model of 'perf sched':

. raw_field_value searches first on the common fields, that are unused
  in this tool

. Leave using perf_evsel__intval to the actual handlers, some may not
  need to incur some of the cost because they may not need all the
  fields values.

. Using perf_session__set_tracepoints_handlers will save all those
  strcmp to find the right handler at sample processing time, do it just
  once and get the handler from evsel->handler.func.

Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-v9x3q9rv4caxtox7wtjpchq5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2012-09-24 10:52:12 -03:00
parent 0f7d2f1b65
commit 746f16ec6a
1 changed files with 87 additions and 146 deletions
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233
tools/perf/builtin-lock.c
View File

@ -1,6 +1,7 @@
#include "builtin.h"
#include "perf.h"
#include "util/evlist.h"
#include "util/evsel.h"
#include "util/util.h"
#include "util/cache.h"
@ -41,7 +42,7 @@ struct lock_stat {
struct rb_node rb; /* used for sorting */
/*
* FIXME: raw_field_value() returns unsigned long long,
* FIXME: perf_evsel__intval() returns u64,
* so address of lockdep_map should be dealed as 64bit.
* Is there more better solution?
*/
@ -336,44 +337,18 @@ static struct lock_stat *lock_stat_findnew(void *addr, const char *name)
static const char *input_name;
struct raw_event_sample {
u32 size;
char data[0];
};
struct trace_acquire_event {
void *addr;
const char *name;
int flag;
};
struct trace_acquired_event {
void *addr;
const char *name;
};
struct trace_contended_event {
void *addr;
const char *name;
};
struct trace_release_event {
void *addr;
const char *name;
};
struct trace_lock_handler {
int (*acquire_event)(struct trace_acquire_event *,
const struct perf_sample *sample);
int (*acquire_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
int (*acquired_event)(struct trace_acquired_event *,
const struct perf_sample *sample);
int (*acquired_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
int (*contended_event)(struct trace_contended_event *,
const struct perf_sample *sample);
int (*contended_event)(struct perf_evsel *evsel,
struct perf_sample *sample);
int (*release_event)(struct trace_release_event *,
const 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)
@ -412,15 +387,20 @@ enum acquire_flags {
READ_LOCK = 2,
};
static int
report_lock_acquire_event(struct trace_acquire_event *acquire_event,
const struct perf_sample *sample)
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");
ls = lock_stat_findnew(acquire_event->addr, acquire_event->name);
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -1;
if (ls->discard)
@ -430,19 +410,19 @@ report_lock_acquire_event(struct trace_acquire_event *acquire_event,
if (!ts)
return -1;
seq = get_seq(ts, acquire_event->addr);
seq = get_seq(ts, addr);
if (!seq)
return -1;
switch (seq->state) {
case SEQ_STATE_UNINITIALIZED:
case SEQ_STATE_RELEASED:
if (!acquire_event->flag) {
if (!flag) {
seq->state = SEQ_STATE_ACQUIRING;
} else {
if (acquire_event->flag & TRY_LOCK)
if (flag & TRY_LOCK)
ls->nr_trylock++;
if (acquire_event->flag & READ_LOCK)
if (flag & READ_LOCK)
ls->nr_readlock++;
seq->state = SEQ_STATE_READ_ACQUIRED;
seq->read_count = 1;
@ -450,7 +430,7 @@ report_lock_acquire_event(struct trace_acquire_event *acquire_event,
}
break;
case SEQ_STATE_READ_ACQUIRED:
if (acquire_event->flag & READ_LOCK) {
if (flag & READ_LOCK) {
seq->read_count++;
ls->nr_acquired++;
goto end;
@ -480,17 +460,20 @@ report_lock_acquire_event(struct trace_acquire_event *acquire_event,
return 0;
}
static int
report_lock_acquired_event(struct trace_acquired_event *acquired_event,
const struct perf_sample *sample)
static int report_lock_acquired_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
u64 timestamp = sample->time;
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");
ls = lock_stat_findnew(acquired_event->addr, acquired_event->name);
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -1;
if (ls->discard)
@ -500,7 +483,7 @@ report_lock_acquired_event(struct trace_acquired_event *acquired_event,
if (!ts)
return -1;
seq = get_seq(ts, acquired_event->addr);
seq = get_seq(ts, addr);
if (!seq)
return -1;
@ -511,7 +494,7 @@ report_lock_acquired_event(struct trace_acquired_event *acquired_event,
case SEQ_STATE_ACQUIRING:
break;
case SEQ_STATE_CONTENDED:
contended_term = timestamp - seq->prev_event_time;
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;
@ -536,20 +519,24 @@ report_lock_acquired_event(struct trace_acquired_event *acquired_event,
seq->state = SEQ_STATE_ACQUIRED;
ls->nr_acquired++;
seq->prev_event_time = timestamp;
seq->prev_event_time = sample->time;
end:
return 0;
}
static int
report_lock_contended_event(struct trace_contended_event *contended_event,
const struct perf_sample *sample)
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");
ls = lock_stat_findnew(contended_event->addr, contended_event->name);
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -1;
if (ls->discard)
@ -559,7 +546,7 @@ report_lock_contended_event(struct trace_contended_event *contended_event,
if (!ts)
return -1;
seq = get_seq(ts, contended_event->addr);
seq = get_seq(ts, addr);
if (!seq)
return -1;
@ -592,15 +579,19 @@ report_lock_contended_event(struct trace_contended_event *contended_event,
return 0;
}
static int
report_lock_release_event(struct trace_release_event *release_event,
const struct perf_sample *sample)
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");
ls = lock_stat_findnew(release_event->addr, release_event->name);
memcpy(&addr, &tmp, sizeof(void *));
ls = lock_stat_findnew(addr, name);
if (!ls)
return -1;
if (ls->discard)
@ -610,7 +601,7 @@ report_lock_release_event(struct trace_release_event *release_event,
if (!ts)
return -1;
seq = get_seq(ts, release_event->addr);
seq = get_seq(ts, addr);
if (!seq)
return -1;
@ -663,96 +654,33 @@ static struct trace_lock_handler *trace_handler;
static int perf_evsel__process_lock_acquire(struct perf_evsel *evsel,
struct perf_sample *sample)
{
struct trace_acquire_event acquire_event;
struct event_format *event = evsel->tp_format;
void *data = sample->raw_data;
u64 tmp; /* this is required for casting... */
int rc = 0;
tmp = raw_field_value(event, "lockdep_addr", data);
memcpy(&acquire_event.addr, &tmp, sizeof(void *));
acquire_event.name = (char *)raw_field_ptr(event, "name", data);
acquire_event.flag = (int)raw_field_value(event, "flag", data);
if (trace_handler->acquire_event)
rc = trace_handler->acquire_event(&acquire_event, sample);
return rc;
return trace_handler->acquire_event(evsel, sample);
return 0;
}
static int perf_evsel__process_lock_acquired(struct perf_evsel *evsel,
struct perf_sample *sample)
{
struct trace_acquired_event acquired_event;
struct event_format *event = evsel->tp_format;
void *data = sample->raw_data;
u64 tmp; /* this is required for casting... */
int rc = 0;
tmp = raw_field_value(event, "lockdep_addr", data);
memcpy(&acquired_event.addr, &tmp, sizeof(void *));
acquired_event.name = (char *)raw_field_ptr(event, "name", data);
if (trace_handler->acquired_event)
rc = trace_handler->acquired_event(&acquired_event, sample);
return rc;
return trace_handler->acquired_event(evsel, sample);
return 0;
}
static int perf_evsel__process_lock_contended(struct perf_evsel *evsel,
struct perf_sample *sample)
struct perf_sample *sample)
{
struct trace_contended_event contended_event;
struct event_format *event = evsel->tp_format;
void *data = sample->raw_data;
u64 tmp; /* this is required for casting... */
int rc = 0;
tmp = raw_field_value(event, "lockdep_addr", data);
memcpy(&contended_event.addr, &tmp, sizeof(void *));
contended_event.name = (char *)raw_field_ptr(event, "name", data);
if (trace_handler->contended_event)
rc = trace_handler->contended_event(&contended_event, sample);
return rc;
return trace_handler->contended_event(evsel, sample);
return 0;
}
static int perf_evsel__process_lock_release(struct perf_evsel *evsel,
struct perf_sample *sample)
struct perf_sample *sample)
{
struct trace_release_event release_event;
struct event_format *event = evsel->tp_format;
void *data = sample->raw_data;
u64 tmp; /* this is required for casting... */
int rc = 0;
tmp = raw_field_value(event, "lockdep_addr", data);
memcpy(&release_event.addr, &tmp, sizeof(void *));
release_event.name = (char *)raw_field_ptr(event, "name", data);
if (trace_handler->release_event)
rc = trace_handler->release_event(&release_event, sample);
return rc;
}
static int perf_evsel__process_lock_event(struct perf_evsel *evsel,
struct perf_sample *sample)
{
struct event_format *event = evsel->tp_format;
int rc = 0;
if (!strcmp(event->name, "lock_acquire"))
rc = perf_evsel__process_lock_acquire(evsel, sample);
if (!strcmp(event->name, "lock_acquired"))
rc = perf_evsel__process_lock_acquired(evsel, sample);
if (!strcmp(event->name, "lock_contended"))
rc = perf_evsel__process_lock_contended(evsel, sample);
if (!strcmp(event->name, "lock_release"))
rc = perf_evsel__process_lock_release(evsel, sample);
return rc;
return trace_handler->release_event(evsel, sample);
return 0;
}
static void print_bad_events(int bad, int total)
@ -870,6 +798,9 @@ static int dump_info(void)
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,
@ -884,7 +815,12 @@ static int process_sample_event(struct perf_tool *tool __maybe_unused,
return -1;
}
return perf_evsel__process_lock_event(evsel, sample);
if (evsel->handler.func != NULL) {
tracepoint_handler f = evsel->handler.func;
return f(evsel, sample);
}
return 0;
}
static struct perf_tool eops = {
@ -893,6 +829,13 @@ static struct perf_tool eops = {
.ordered_samples = true,
};
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 int read_events(void)
{
session = perf_session__new(input_name, O_RDONLY, 0, false, &eops);
@ -901,6 +844,11 @@ static int read_events(void)
return -1;
}
if (perf_session__set_tracepoints_handlers(session, lock_tracepoints)) {
pr_err("Initializing perf session tracepoint handlers failed\n");
return -1;
}
return perf_session__process_events(session, &eops);
}
@ -967,13 +915,6 @@ static const struct option lock_options[] = {
OPT_END()
};
static const char * const lock_tracepoints[] = {
"lock:lock_acquire", /* CONFIG_LOCKDEP */
"lock:lock_acquired", /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
"lock:lock_contended", /* CONFIG_LOCKDEP, CONFIG_LOCK_STAT */
"lock:lock_release", /* CONFIG_LOCKDEP */
};
static const char *record_args[] = {
"record",
"-R",
@ -988,10 +929,10 @@ static int __cmd_record(int argc, const char **argv)
const char **rec_argv;
for (i = 0; i < ARRAY_SIZE(lock_tracepoints); i++) {
if (!is_valid_tracepoint(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]);
lock_tracepoints[i].name);
return 1;
}
}
@ -1009,7 +950,7 @@ static int __cmd_record(int argc, const char **argv)
for (j = 0; j < ARRAY_SIZE(lock_tracepoints); j++) {
rec_argv[i++] = "-e";
rec_argv[i++] = strdup(lock_tracepoints[j]);
rec_argv[i++] = strdup(lock_tracepoints[j].name);
}
for (j = 1; j < (unsigned int)argc; j++, i++)