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Subject[tip:perf/core] perf tools: Add event_update event scale type
Commit-ID:  daeecbc0c431f15f492fb8d704080a02de6e2918
Gitweb: http://git.kernel.org/tip/daeecbc0c431f15f492fb8d704080a02de6e2918
Author: Jiri Olsa <jolsa@kernel.org>
AuthorDate: Sun, 25 Oct 2015 15:51:38 +0100
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Thu, 17 Dec 2015 15:11:59 -0300

perf tools: Add event_update event scale type

A__allocdding scale type 'event update' event, that stores/transfer
events scale value. The PMU events can define the scale
value which is used to multiply events data.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Kan Liang <kan.liang@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1445784728-21732-23-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/tests/event_update.c | 21 +++++++++++++++++++++
tools/perf/util/event.h | 5 +++++
tools/perf/util/header.c | 26 ++++++++++++++++++++++++++
tools/perf/util/header.h | 3 +++
4 files changed, 55 insertions(+)

diff --git a/tools/perf/tests/event_update.c b/tools/perf/tests/event_update.c
index 9cdf4c9..a91fcef 100644
--- a/tools/perf/tests/event_update.c
+++ b/tools/perf/tests/event_update.c
@@ -18,6 +18,22 @@ static int process_event_unit(struct perf_tool *tool __maybe_unused,
return 0;
}

+static int process_event_scale(struct perf_tool *tool __maybe_unused,
+ union perf_event *event,
+ struct perf_sample *sample __maybe_unused,
+ struct machine *machine __maybe_unused)
+{
+ struct event_update_event *ev = (struct event_update_event *) event;
+ struct event_update_event_scale *ev_data;
+
+ ev_data = (struct event_update_event_scale *) ev->data;
+
+ TEST_ASSERT_VAL("wrong id", ev->id == 123);
+ TEST_ASSERT_VAL("wrong id", ev->type == PERF_EVENT_UPDATE__SCALE);
+ TEST_ASSERT_VAL("wrong scale", ev_data->scale = 0.123);
+ return 0;
+}
+
int test__event_update(int subtest __maybe_unused)
{
struct perf_evlist *evlist;
@@ -38,5 +54,10 @@ int test__event_update(int subtest __maybe_unused)
TEST_ASSERT_VAL("failed to synthesize attr update unit",
!perf_event__synthesize_event_update_unit(NULL, evsel, process_event_unit));

+ evsel->scale = 0.123;
+
+ TEST_ASSERT_VAL("failed to synthesize attr update scale",
+ !perf_event__synthesize_event_update_scale(NULL, evsel, process_event_scale));
+
return 0;
}
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 64c4cdf..44198e8 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -310,6 +310,11 @@ struct attr_event {

enum {
PERF_EVENT_UPDATE__UNIT = 0,
+ PERF_EVENT_UPDATE__SCALE = 1,
+};
+
+struct event_update_event_scale {
+ double scale;
};

struct event_update_event {
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 5759ebf..30edb4b 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2723,6 +2723,27 @@ perf_event__synthesize_event_update_unit(struct perf_tool *tool,
return err;
}

+int
+perf_event__synthesize_event_update_scale(struct perf_tool *tool,
+ struct perf_evsel *evsel,
+ perf_event__handler_t process)
+{
+ struct event_update_event *ev;
+ struct event_update_event_scale *ev_data;
+ int err;
+
+ ev = event_update_event__new(sizeof(*ev_data), PERF_EVENT_UPDATE__SCALE, evsel->id[0]);
+ if (ev == NULL)
+ return -ENOMEM;
+
+ ev_data = (struct event_update_event_scale *) ev->data;
+ ev_data->scale = evsel->scale;
+ err = process(tool, (union perf_event*) ev, NULL, NULL);
+ free(ev);
+ return err;
+}
+
+
int perf_event__synthesize_attrs(struct perf_tool *tool,
struct perf_session *session,
perf_event__handler_t process)
@@ -2787,6 +2808,7 @@ int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
struct perf_evlist **pevlist)
{
struct event_update_event *ev = &event->event_update;
+ struct event_update_event_scale *ev_scale;
struct perf_evlist *evlist;
struct perf_evsel *evsel;

@@ -2802,6 +2824,10 @@ int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,
switch (ev->type) {
case PERF_EVENT_UPDATE__UNIT:
evsel->unit = strdup(ev->data);
+ break;
+ case PERF_EVENT_UPDATE__SCALE:
+ ev_scale = (struct event_update_event_scale *) ev->data;
+ evsel->scale = ev_scale->scale;
default:
break;
}
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 6aa2b92..fad04cb 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -108,6 +108,9 @@ int perf_event__synthesize_attrs(struct perf_tool *tool,
int perf_event__synthesize_event_update_unit(struct perf_tool *tool,
struct perf_evsel *evsel,
perf_event__handler_t process);
+int perf_event__synthesize_event_update_scale(struct perf_tool *tool,
+ struct perf_evsel *evsel,
+ perf_event__handler_t process);
int perf_event__process_attr(struct perf_tool *tool, union perf_event *event,
struct perf_evlist **pevlist);
int perf_event__process_event_update(struct perf_tool *tool __maybe_unused,

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