[PATCH 23/57] perf tools: Add attr_update event cpus type

[Jiri Olsa]

Adding cpumask attr update event, that stores/transfer
cpumask for event.

Link: http://lkml.kernel.org/n/tip-wm844j3ht4isjn2elinc09rk@xxxxxxxxxxxxxx
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
 tools/perf/tests/attr_update.c | 30 ++++++++++++++++++++++++++++++
 tools/perf/util/event.h        |  5 +++++
 tools/perf/util/header.c       | 42 ++++++++++++++++++++++++++++++++++++++++++
 tools/perf/util/header.h       |  3 +++
 4 files changed, 80 insertions(+)

diff --git a/tools/perf/tests/attr_update.c b/tools/perf/tests/attr_update.c
index a88c0d7d9d08..09e0c4533191 100644
--- a/tools/perf/tests/attr_update.c
+++ b/tools/perf/tests/attr_update.c
@@ -53,6 +53,30 @@ static int process_event_name(struct perf_tool *tool,
 	return 0;
 }
 
+static int process_event_cpus(struct perf_tool *tool __maybe_unused,
+			      union perf_event *event,
+			      struct perf_sample *sample __maybe_unused,
+			      struct machine *machine __maybe_unused)
+{
+	struct attr_update_event *ev = (struct attr_update_event*) event;
+	struct attr_update_event_cpus *ev_data;
+	struct cpu_map *map;
+
+	ev_data = (struct attr_update_event_cpus*) ev->data;
+
+	map = cpu_map__new_data(&ev_data->cpus);
+
+	TEST_ASSERT_VAL("wrong id", ev->id == 123);
+	TEST_ASSERT_VAL("wrong type", ev->type == PERF_ATTR_UPDATE__CPUS);
+	TEST_ASSERT_VAL("wrong cpus", map->nr == 3);
+	TEST_ASSERT_VAL("wrong cpus", map->map[0] == 1);
+	TEST_ASSERT_VAL("wrong cpus", map->map[1] == 2);
+	TEST_ASSERT_VAL("wrong cpus", map->map[2] == 3);
+	cpu_map__put(map);
+	return 0;
+}
+
+
 int test__attr_update(void)
 {
 	struct perf_evlist *evlist;
@@ -84,5 +108,11 @@ int test__attr_update(void)
 	TEST_ASSERT_VAL("failed to synthesize attr update name",
 			!perf_event__synthesize_attr_update_name(&tmp.tool, evsel, process_event_name));
 
+	evsel->own_cpus = cpu_map__new("1,2,3");
+
+	TEST_ASSERT_VAL("failed to synthesize attr update cpus",
+			!perf_event__synthesize_attr_update_cpus(&tmp.tool, evsel, process_event_cpus));
+
+	cpu_map__put(evsel->own_cpus);
 	return 0;
 }
diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index 066429535349..ae8e49145f62 100644
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -313,6 +313,11 @@ enum {
 	PERF_ATTR_UPDATE__UNIT  = 0,
 	PERF_ATTR_UPDATE__SCALE = 1,
 	PERF_ATTR_UPDATE__NAME  = 2,
+	PERF_ATTR_UPDATE__CPUS  = 3,
+};
+
+struct attr_update_event_cpus {
+	struct cpu_map_data cpus;
 };
 
 struct attr_update_event_scale {
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 1516e7146b84..83c3bbd05b80 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2762,6 +2762,38 @@ perf_event__synthesize_attr_update_name(struct perf_tool *tool,
 	return err;
 }
 
+int
+perf_event__synthesize_attr_update_cpus(struct perf_tool *tool,
+					struct perf_evsel *evsel,
+					perf_event__handler_t process)
+{
+	size_t size = sizeof(struct attr_update_event);
+	struct attr_update_event *ev;
+	int max, err;
+	u64 type;
+
+	if (!evsel->own_cpus)
+		return 0;
+
+	ev = cpu_map_data__alloc(evsel->own_cpus, &size, &type, &max);
+	if (!ev)
+		return -ENOMEM;
+
+	ev->header.type = PERF_RECORD_HEADER_ATTR_UPDATE;
+	ev->header.size = (u16)size;
+	ev->type = PERF_ATTR_UPDATE__CPUS;
+	ev->id   = evsel->id[0];
+
+	cpu_map_data__synthesize((struct cpu_map_data *) ev->data,
+				 evsel->own_cpus,
+				 type, max);
+
+	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)
@@ -2827,8 +2859,10 @@ int perf_event__process_attr_update(struct perf_tool *tool __maybe_unused,
 {
 	struct attr_update_event *ev = &event->attr_update;
 	struct attr_update_event_scale *ev_scale;
+	struct attr_update_event_cpus *ev_cpus;
 	struct perf_evlist *evlist;
 	struct perf_evsel *evsel;
+	struct cpu_map *map;
 
 	if (!pevlist || *pevlist == NULL)
 		return -EINVAL;
@@ -2849,6 +2883,14 @@ int perf_event__process_attr_update(struct perf_tool *tool __maybe_unused,
 	case PERF_ATTR_UPDATE__SCALE:
 		ev_scale = (struct attr_update_event_scale *) ev->data;
 		evsel->scale = ev_scale->scale;
+	case PERF_ATTR_UPDATE__CPUS:
+		ev_cpus = (struct attr_update_event_cpus *) ev->data;
+
+		map = cpu_map__new_data(&ev_cpus->cpus);
+		if (map)
+			evsel->own_cpus = map;
+		else
+			pr_err("failed to get attr_update cpus\n");
 	default:
 		break;
 	}
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index cb538ade38d3..db673b0cef41 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -114,6 +114,9 @@ int perf_event__synthesize_attr_update_scale(struct perf_tool *tool,
 int perf_event__synthesize_attr_update_name(struct perf_tool *tool,
 					    struct perf_evsel *evsel,
 					    perf_event__handler_t process);
+int perf_event__synthesize_attr_update_cpus(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_attr_update(struct perf_tool *tool __maybe_unused,
-- 
2.4.3

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