perf hists: Add support for accumulated stat of hist entry

Maintain accumulated stat information in hist_entry->stat_acc if
symbol_conf.cumulate_callchain is set.  Fields in ->stat_acc have same
vaules initially, and will be updated as callchain is processed later.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arun Sharma <asharma@fb.com>
Tested-by: Rodrigo Campos <rodrigo@sdfg.com.ar>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1401335910-16832-4-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/tools/perf/util/sort.h b/tools/perf/util/sort.h
index 5f38d925e92f..c9ffa031becd 100644
--- a/tools/perf/util/sort.h
+++ b/tools/perf/util/sort.h
@@ -82,6 +82,7 @@ struct hist_entry {
                 struct list_head head;
         } pairs;
         struct he_stat          stat;
+        struct he_stat          *stat_acc;
         struct map_symbol       ms;
         struct thread           *thread;
         struct comm             *comm;