perf: Convert perf event types into event type events

Bypasses the event type perf header code and replaces it with a
synthesized event and processing function that accomplishes the
same thing, used when reading/writing perf data to/from a pipe.

Signed-off-by: Tom Zanussi <tzanussi@gmail.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: fweisbec@gmail.com
Cc: rostedt@goodmis.org
Cc: k-keiichi@bx.jp.nec.com
Cc: acme@ghostprotocols.net
LKML-Reference: <1270184365-8281-7-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi 2010-04-01 23:59:20 -05:00 committed by Ingo Molnar
parent 2c46dbb517
commit cd19a035f3
8 changed files with 101 additions and 8 deletions

View file

@ -592,6 +592,13 @@ static int __cmd_record(int argc, const char **argv)
pr_err("Couldn't synthesize attrs.\n");
return err;
}
err = event__synthesize_event_types(process_synthesized_event,
session);
if (err < 0) {
pr_err("Couldn't synthesize event_types.\n");
return err;
}
}
err = event__synthesize_kernel_mmap(process_synthesized_event,

View file

@ -268,6 +268,7 @@ static struct perf_event_ops event_ops = {
.lost = event__process_lost,
.read = process_read_event,
.attr = event__process_attr,
.event_type = event__process_event_type,
};
extern volatile int session_done;

View file

@ -105,6 +105,7 @@ static struct perf_event_ops event_ops = {
.sample = process_sample_event,
.comm = event__process_comm,
.attr = event__process_attr,
.event_type = event__process_event_type,
};
extern volatile int session_done;

View file

@ -85,6 +85,7 @@ struct build_id_event {
enum perf_header_event_type { /* above any possible kernel type */
PERF_RECORD_HEADER_ATTR = 64,
PERF_RECORD_HEADER_EVENT_TYPE = 65,
PERF_RECORD_HEADER_MAX
};
@ -94,6 +95,18 @@ struct attr_event {
u64 id[];
};
#define MAX_EVENT_NAME 64
struct perf_trace_event_type {
u64 event_id;
char name[MAX_EVENT_NAME];
};
struct event_type_event {
struct perf_event_header header;
struct perf_trace_event_type event_type;
};
typedef union event_union {
struct perf_event_header header;
struct ip_event ip;
@ -104,6 +117,7 @@ typedef union event_union {
struct read_event read;
struct sample_event sample;
struct attr_event attr;
struct event_type_event event_type;
} event_t;
struct events_stats {

View file

@ -99,13 +99,6 @@ int perf_header__add_attr(struct perf_header *self,
return 0;
}
#define MAX_EVENT_NAME 64
struct perf_trace_event_type {
u64 event_id;
char name[MAX_EVENT_NAME];
};
static int event_count;
static struct perf_trace_event_type *events;
@ -886,3 +879,58 @@ int event__process_attr(event_t *self, struct perf_session *session)
return 0;
}
int event__synthesize_event_type(u64 event_id, char *name,
event__handler_t process,
struct perf_session *session)
{
event_t ev;
size_t size = 0;
int err = 0;
memset(&ev, 0, sizeof(ev));
ev.event_type.event_type.event_id = event_id;
memset(ev.event_type.event_type.name, 0, MAX_EVENT_NAME);
strncpy(ev.event_type.event_type.name, name, MAX_EVENT_NAME - 1);
ev.event_type.header.type = PERF_RECORD_HEADER_EVENT_TYPE;
size = strlen(name);
size = ALIGN(size, sizeof(u64));
ev.event_type.header.size = sizeof(ev.event_type) -
(sizeof(ev.event_type.event_type.name) - size);
err = process(&ev, session);
return err;
}
int event__synthesize_event_types(event__handler_t process,
struct perf_session *session)
{
struct perf_trace_event_type *type;
int i, err = 0;
for (i = 0; i < event_count; i++) {
type = &events[i];
err = event__synthesize_event_type(type->event_id, type->name,
process, session);
if (err) {
pr_debug("failed to create perf header event type\n");
return err;
}
}
return err;
}
int event__process_event_type(event_t *self,
struct perf_session *session __unused)
{
if (perf_header__push_event(self->event_type.event_type.event_id,
self->event_type.event_type.name) < 0)
return -ENOMEM;
return 0;
}

View file

@ -103,4 +103,13 @@ int event__synthesize_attrs(struct perf_header *self,
struct perf_session *session);
int event__process_attr(event_t *self, struct perf_session *session);
int event__synthesize_event_type(u64 event_id, char *name,
event__handler_t process,
struct perf_session *session);
int event__synthesize_event_types(event__handler_t process,
struct perf_session *session);
int event__process_event_type(event_t *self,
struct perf_session *session);
#endif /* __PERF_HEADER_H */

View file

@ -202,6 +202,8 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
handler->unthrottle = process_event_stub;
if (handler->attr == NULL)
handler->attr = process_event_stub;
if (handler->event_type == NULL)
handler->event_type = process_event_stub;
}
static const char *event__name[] = {
@ -216,6 +218,7 @@ static const char *event__name[] = {
[PERF_RECORD_READ] = "READ",
[PERF_RECORD_SAMPLE] = "SAMPLE",
[PERF_RECORD_HEADER_ATTR] = "ATTR",
[PERF_RECORD_HEADER_EVENT_TYPE] = "EVENT_TYPE",
};
unsigned long event__total[PERF_RECORD_HEADER_MAX];
@ -302,6 +305,12 @@ static void event__attr_swap(event_t *self)
mem_bswap_64(self->attr.id, size);
}
static void event__event_type_swap(event_t *self)
{
self->event_type.event_type.event_id =
bswap_64(self->event_type.event_type.event_id);
}
typedef void (*event__swap_op)(event_t *self);
static event__swap_op event__swap_ops[] = {
@ -313,6 +322,7 @@ static event__swap_op event__swap_ops[] = {
[PERF_RECORD_READ] = event__read_swap,
[PERF_RECORD_SAMPLE] = event__all64_swap,
[PERF_RECORD_HEADER_ATTR] = event__attr_swap,
[PERF_RECORD_HEADER_EVENT_TYPE] = event__event_type_swap,
[PERF_RECORD_HEADER_MAX] = NULL,
};
@ -355,6 +365,8 @@ static int perf_session__process_event(struct perf_session *self,
return ops->unthrottle(event, self);
case PERF_RECORD_HEADER_ATTR:
return ops->attr(event, self);
case PERF_RECORD_HEADER_EVENT_TYPE:
return ops->event_type(event, self);
default:
self->unknown_events++;
return -1;

View file

@ -45,7 +45,8 @@ struct perf_event_ops {
read,
throttle,
unthrottle,
attr;
attr,
event_type;
};
struct perf_session *perf_session__new(const char *filename, int mode, bool force);