[PATCH 10/20] perf tools: Keep group information

Namhyung Kim
2012-10-04T12:51:52Z

From: Namhyung Kim <namhyung.kim@lge.com>

Add a few of group-related field in struct perf_{evlist,evsel} so that
the group information in a evlist can be known easily. It only counts
groups which have more than 1 members since leader-only groups are
treated as non-group events.

Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Stephane Eranian <eranian@google.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/evlist.c | 10 ++++++++--
tools/perf/util/evlist.h | 1 +
tools/perf/util/evsel.h | 10 ++++++++++
tools/perf/util/parse-events.c | 1 +
tools/perf/util/parse-events.h | 1 +
tools/perf/util/parse-events.y | 10 ++++++++++
6 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index ae89686102f4..ac9730c12884 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -111,20 +111,26 @@ void perf_evlist__splice_list_tail(struct perf_evlist *evlist,
void __perf_evlist__set_leader(struct list_head *list)
{
struct perf_evsel *evsel, *leader;
+ int count = 0;

leader = list_entry(list->next, struct perf_evsel, node);
leader->leader = NULL;

list_for_each_entry(evsel, list, node) {
- if (evsel != leader)
+ if (evsel != leader) {
evsel->leader = leader;
+ evsel->group_idx = count++;
+ }
}
+ leader->nr_members = count;
}

void perf_evlist__set_leader(struct perf_evlist *evlist)
{
- if (evlist->nr_entries)
+ if (evlist->nr_entries) {
+ evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0;
__perf_evlist__set_leader(&evlist->entries);
+ }
}

int perf_evlist__add_default(struct perf_evlist *evlist)
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 3f1fb66be022..a3a4906d4a4e 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -21,6 +21,7 @@ struct perf_evlist {
struct list_head entries;
struct hlist_head heads[PERF_EVLIST__HLIST_SIZE];
int nr_entries;
+ int nr_groups;
int nr_fds;
int nr_mmaps;
int mmap_len;
diff --git a/tools/perf/util/evsel.h b/tools/perf/util/evsel.h
index 3ead0d59c03d..407c8e84fee3 100644
--- a/tools/perf/util/evsel.h
+++ b/tools/perf/util/evsel.h
@@ -74,6 +74,10 @@ struct perf_evsel {
int exclude_GH;
struct perf_evsel *leader;
char *group_name;
+ union {
+ int nr_members;
+ int group_idx;
+ };
};

struct cpu_map;
@@ -225,4 +229,10 @@ static inline struct perf_evsel *perf_evsel__next(struct perf_evsel *evsel)
{
return list_entry(evsel->node.next, struct perf_evsel, node);
}
+
+/* Treat a non-group event as a leader */
+static inline bool perf_evsel__is_group_leader(struct perf_evsel *evsel)
+{
+ return evsel->leader == NULL;
+}
#endif /* __PERF_EVSEL_H */
diff --git a/tools/perf/util/parse-events.c b/tools/perf/util/parse-events.c
index aed38e4b9dfa..364e518b0fce 100644
--- a/tools/perf/util/parse-events.c
+++ b/tools/perf/util/parse-events.c
@@ -816,6 +816,7 @@ int parse_events(struct perf_evlist *evlist, const char *str,
if (!ret) {
int entries = data.idx - evlist->nr_entries;
perf_evlist__splice_list_tail(evlist, &data.list, entries);
+ evlist->nr_groups += data.nr_groups;
return 0;
}

diff --git a/tools/perf/util/parse-events.h b/tools/perf/util/parse-events.h
index c356e443448d..f6b0254afe17 100644
--- a/tools/perf/util/parse-events.h
+++ b/tools/perf/util/parse-events.h
@@ -65,6 +65,7 @@ struct parse_events__term {
struct parse_events_data__events {
struct list_head list;
int idx;
+ int nr_groups;
};

struct parse_events_data__terms {
diff --git a/tools/perf/util/parse-events.y b/tools/perf/util/parse-events.y
index cd88209e3c58..a7810dd0938a 100644
--- a/tools/perf/util/parse-events.y
+++ b/tools/perf/util/parse-events.y
@@ -122,6 +122,11 @@ group_def:
PE_NAME '{' events '}'
{
struct list_head *list = $3;
+ struct parse_events_data__events *data = _data;
+
+ /* Count groups only have more than 1 members */
+ if (!list_is_last(list->next, list))
+ data->nr_groups++;

parse_events__set_leader($1, list);
$$ = list;
@@ -130,6 +135,11 @@ PE_NAME '{' events '}'
'{' events '}'
{
struct list_head *list = $2;
+ struct parse_events_data__events *data = _data;
+
+ /* Count groups only have more than 1 members */
+ if (!list_is_last(list->next, list))
+ data->nr_groups++;

parse_events__set_leader(NULL, list);
$$ = list;
--
1.7.9.2