perf report: Add report.children config option

Add report.children config option for setting default value of
callchain accumulation.  It affects the report output only if
perf.data contains callchain info.

A user can write .perfconfig file like below to enable accumulation
by default:

  $ cat ~/.perfconfig
  [report]
  children = true

And it can be disabled through command line:

  $ perf report --no-children

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/1401335910-16832-17-git-send-email-namhyung@kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index f27a8aad6a3f8c41c380afbc8b9cd252ab227f39..6cac509212ee7e7cb92fabe278cd601ac3b93584 100644 (file)
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -72,6 +72,10 @@ static int report__config(const char *var, const char *value, void *cb)
                rep->min_percent = strtof(value, NULL);
                return 0;
        }
+       if (!strcmp(var, "report.children")) {
+               symbol_conf.cumulate_callchain = perf_config_bool(var, value);
+               return 0;
+       }
 
        return perf_default_config(var, value, cb);
 }