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Subject[PATCH 07/11] perf tools: Add perf_evlist__id2sid function to get event ID related data
Date
Adding perf_evlist__id2sid function to be able to get ID related
data. This will be helpful for PERF_FORMAT_GROUP samples where
we need to store ID related period value for each event.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/util/evlist.c | 21 ++++++++++++++++-----
tools/perf/util/evlist.h | 2 ++
2 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/tools/perf/util/evlist.c b/tools/perf/util/evlist.c
index 8789adf..b7565ad 100644
--- a/tools/perf/util/evlist.c
+++ b/tools/perf/util/evlist.c
@@ -335,22 +335,33 @@ static int perf_evlist__id_add_fd(struct perf_evlist *evlist,
return 0;
}

-struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
+struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id)
{
struct hlist_head *head;
struct hlist_node *pos;
struct perf_sample_id *sid;
int hash;

- if (evlist->nr_entries == 1)
- return perf_evlist__first(evlist);
-
hash = hash_64(id, PERF_EVLIST__HLIST_BITS);
head = &evlist->heads[hash];

hlist_for_each_entry(sid, pos, head, node)
if (sid->id == id)
- return sid->evsel;
+ return sid;
+
+ return NULL;
+}
+
+struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id)
+{
+ struct perf_sample_id *sid;
+
+ if (evlist->nr_entries == 1)
+ return perf_evlist__first(evlist);
+
+ sid = perf_evlist__id2sid(evlist, id);
+ if (sid)
+ return sid->evsel;

if (!perf_evlist__sample_id_all(evlist))
return perf_evlist__first(evlist);
diff --git a/tools/perf/util/evlist.h b/tools/perf/util/evlist.h
index 0b7297c..565f114 100644
--- a/tools/perf/util/evlist.h
+++ b/tools/perf/util/evlist.h
@@ -73,6 +73,8 @@ void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd);

struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id);

+struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id);
+
union perf_event *perf_evlist__mmap_read(struct perf_evlist *self, int idx);

int perf_evlist__open(struct perf_evlist *evlist);
--
1.7.11.7


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