[PATCH 15/21] perf report: Add --children option

Namhyung Kim
2014-01-23T00:14:23Z

The --children option is for showing accumulated overhead (period)
value as well as self overhead.

Tested-by: Arun Sharma <asharma@fb.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/Documentation/perf-report.txt | 5 +++++
tools/perf/builtin-report.c | 10 ++++++++++
2 files changed, 15 insertions(+)

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index 09af66298564..36eb1877563f 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -144,6 +144,11 @@ OPTIONS

Default: fractal,0.5,callee,function.

+--children::
+ Accumulate callchain of children to parent entry so that then can
+ show up in the output. The output will have a new "Children" column
+ and will be sorted on the data. It requires callchains are recorded.
+
--max-stack::
Set the stack depth limit when parsing the callchain, anything
beyond the specified depth will be ignored. This is a trade-off
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index 3ed0669d7620..56fe8c00b1be 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -183,6 +183,14 @@ static int report__setup_sample_type(struct report *rep)
}
}

+ if (symbol_conf.cumulate_callchain) {
+ /* Silently ignore if callchain is missing */
+ if (!(sample_type & PERF_SAMPLE_CALLCHAIN)) {
+ symbol_conf.cumulate_callchain = false;
+ perf_hpp__cancel_cumulate();
+ }
+ }
+
if (sort__mode == SORT_MODE__BRANCH) {
if (!is_pipe &&
!(sample_type & PERF_SAMPLE_BRANCH_STACK)) {
@@ -661,6 +669,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
OPT_CALLBACK_DEFAULT('g', "call-graph", &report, "output_type,min_percent[,print_limit],call_order",
"Display callchains using output_type (graph, flat, fractal, or none) , min percent threshold, optional print limit, callchain order, key (function or address). "
"Default: fractal,0.5,callee,function", &parse_callchain_opt, callchain_default_opt),
+ OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain,
+ "Accumulate callchains of children and show total overhead as well"),
OPT_INTEGER(0, "max-stack", &report.max_stack,
"Set the maximum stack depth when parsing the callchain, "
"anything beyond the specified depth will be ignored. "
--
1.7.11.7