perf stat: Introduce perf_evsel__alloc_stats function

Move all stat allocation logic related to stat object under single
function. This way we can use it separately for stat object out of
evlist object.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1435310967-14570-13-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 16 insertions, 6 deletions

diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 818cb022fcb6..f2a0d1521e26 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -189,17 +189,25 @@ void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
         evsel->prev_raw_counts = NULL;
 }
 
+int perf_evsel__alloc_stats(struct perf_evsel *evsel, bool alloc_raw)
+{
+        int ncpus = perf_evsel__nr_cpus(evsel);
+        int nthreads = thread_map__nr(evsel->threads);
+
+        if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
+            perf_evsel__alloc_counts(evsel, ncpus, nthreads) < 0 ||
+            (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel, ncpus, nthreads) < 0))
+                return -ENOMEM;
+
+        return 0;
+}
+
 int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
 {
         struct perf_evsel *evsel;
-        int nthreads = thread_map__nr(evlist->threads);
 
         evlist__for_each(evlist, evsel) {
-                int ncpus = perf_evsel__nr_cpus(evsel);
-
-                if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
-                    perf_evsel__alloc_counts(evsel, ncpus, nthreads) < 0 ||
-                    (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel, ncpus, nthreads) < 0))
+                if (perf_evsel__alloc_stats(evsel, alloc_raw))
                         goto out_free;
         }
 
diff --git a/tools/perf/util/stat.h b/tools/perf/util/stat.h
index 5f62db2472c7..9f05c571befe 100644
--- a/tools/perf/util/stat.h
+++ b/tools/perf/util/stat.h
@@ -103,6 +103,8 @@ int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel,
                                       int ncpus, int nthreads);
 void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel);
 
+int perf_evsel__alloc_stats(struct perf_evsel *evsel, bool alloc_raw);
+
 int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw);
 void perf_evlist__free_stats(struct perf_evlist *evlist);
 void perf_evlist__reset_stats(struct perf_evlist *evlist);