[PATCH 15/15] perf report: Add --cumulate option

[Namhyung Kim <namhyung@kernel.org>]

From: Namhyung Kim <namhyung.kim@lge.com>

When --cumulate option is given, it will print accumulated hist stat
information.  It requires callchain information.

Cc: Arun Sharma <asharma@fb.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/builtin-report.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 97b2e6300f4c..92da05c2151f 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -282,6 +282,12 @@ static int perf_report__setup_sample_type(struct perf_report *rep)
 		}
 	}
 
+	if (!symbol_conf.use_callchain && symbol_conf.cumulate_callchain) {
+		ui__error("Selected --cumulate but no callchain data. "
+			  "Did you call 'perf record' without -g?\n");
+		return -1;
+	}
+
 	return 0;
 }
 
@@ -641,6 +647,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
 		    "use branch records for histogram filling", parse_branch_mode),
 	OPT_STRING(0, "objdump", &objdump_path, "path",
 		   "objdump binary to use for disassembly and annotations"),
+	OPT_BOOLEAN(0, "cumulate", &symbol_conf.cumulate_callchain,
+		    "Accumulate period along the callchain"),
 	OPT_END()
 	};
 
-- 
1.7.11.4