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perf: Convert perf header attrs into attr events

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Bypasses the attr 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.

Making the attrs into events allows them to be streamed over a
pipe along with the rest of the header data (in later patches).
It also paves the way to allowing events to be added and removed
from perf sessions dynamically.

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: <1270184365-8281-6-git-send-email-tzanussi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Tom Zanussi
2010-04-01 23:59:19 -05:00
committed by Ingo Molnar
parent c239da3b4b
commit 2c46dbb517
8 changed files with 136 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
tools/perf/util/session.c
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@ -200,6 +200,8 @@ static void perf_event_ops__fill_defaults(struct perf_event_ops *handler)
handler->throttle = process_event_stub;
if (handler->unthrottle == NULL)
handler->unthrottle = process_event_stub;
if (handler->attr == NULL)
handler->attr = process_event_stub;
}
static const char *event__name[] = {
@ -213,6 +215,7 @@ static const char *event__name[] = {
[PERF_RECORD_FORK] = "FORK",
[PERF_RECORD_READ] = "READ",
[PERF_RECORD_SAMPLE] = "SAMPLE",
[PERF_RECORD_HEADER_ATTR] = "ATTR",
};
unsigned long event__total[PERF_RECORD_HEADER_MAX];
@ -279,6 +282,26 @@ static void event__read_swap(event_t *self)
self->read.id = bswap_64(self->read.id);
}
static void event__attr_swap(event_t *self)
{
size_t size;
self->attr.attr.type = bswap_32(self->attr.attr.type);
self->attr.attr.size = bswap_32(self->attr.attr.size);
self->attr.attr.config = bswap_64(self->attr.attr.config);
self->attr.attr.sample_period = bswap_64(self->attr.attr.sample_period);
self->attr.attr.sample_type = bswap_64(self->attr.attr.sample_type);
self->attr.attr.read_format = bswap_64(self->attr.attr.read_format);
self->attr.attr.wakeup_events = bswap_32(self->attr.attr.wakeup_events);
self->attr.attr.bp_type = bswap_32(self->attr.attr.bp_type);
self->attr.attr.bp_addr = bswap_64(self->attr.attr.bp_addr);
self->attr.attr.bp_len = bswap_64(self->attr.attr.bp_len);
size = self->header.size;
size -= (void *)&self->attr.id - (void *)self;
mem_bswap_64(self->attr.id, size);
}
typedef void (*event__swap_op)(event_t *self);
static event__swap_op event__swap_ops[] = {
@ -289,6 +312,7 @@ static event__swap_op event__swap_ops[] = {
[PERF_RECORD_LOST] = event__all64_swap,
[PERF_RECORD_READ] = event__read_swap,
[PERF_RECORD_SAMPLE] = event__all64_swap,
[PERF_RECORD_HEADER_ATTR] = event__attr_swap,
[PERF_RECORD_HEADER_MAX] = NULL,
};
@ -329,6 +353,8 @@ static int perf_session__process_event(struct perf_session *self,
return ops->throttle(event, self);
case PERF_RECORD_UNTHROTTLE:
return ops->unthrottle(event, self);
case PERF_RECORD_HEADER_ATTR:
return ops->attr(event, self);
default:
self->unknown_events++;
return -1;