The --children option is for showing accumulated overhead (period)
value as well as self overhead.
Cc: Arun Sharma <asha...@fb.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Signed-off-by: Namhyung Kim <namhy...@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 9a67a42356d6..59e04df1b387 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -141,6 +141,11 @@ 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
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