perf hists: Accumulate hist entry stat based on the callchain

Call __hists__add_entry() for each callchain node to get an
accumulated stat for an entry.  Introduce new cumulative_iter ops to
process them properly.

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/1401335910-16832-6-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 3201bdfa8c3f..e8fa9fea341f 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -115,6 +115,8 @@ static int process_sample_event(struct perf_tool *tool,
                 iter.ops = &hist_iter_branch;
         else if (rep->mem_mode)
                 iter.ops = &hist_iter_mem;
+        else if (symbol_conf.cumulate_callchain)
+                iter.ops = &hist_iter_cumulative;
         else
                 iter.ops = &hist_iter_normal;