The --children option is for showing accumulated overhead (period)
value as well as self overhead.
Tested-by: Arun Sharma <asha...@fb.com>
Tested-by: Rodrigo Campos <rodr...@sdfg.com.ar>
Acked-by: Jiri Olsa <jo...@redhat.com>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Signed-off-by: Namhyung Kim <namhy...@kernel.org>
---
tools/perf/Documentation/perf-report.txt | 7 ++++++-
tools/perf/builtin-report.c | 15 ++++++++++++++-
2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-report.txt
b/tools/perf/Documentation/perf-report.txt
index a1b5185402d5..cefdf430d1b4 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -111,7 +111,7 @@ OPTIONS
--fields=::
Specify output field - multiple keys can be specified in CSV format.
Following fields are available:
- overhead, overhead_sys, overhead_us, sample and period.
+ overhead, overhead_sys, overhead_us, overhead_children, sample and
period.
Also it can contain any sort key(s).
By default, every sort keys not specified in -F will be appended
@@ -163,6 +163,11 @@ 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 e8fa9fea341f..f27a8aad6a3f 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -185,6 +185,14 @@ 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)) {
@@ -568,6 +576,8 @@ 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",
&report_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. "
@@ -660,8 +670,10 @@ repeat:
has_br_stack = perf_header__has_feat(&session->header,
HEADER_BRANCH_STACK);
- if (branch_mode == -1 && has_br_stack)
+ if (branch_mode == -1 && has_br_stack) {
sort__mode = SORT_MODE__BRANCH;
+ symbol_conf.cumulate_callchain = false;
+ }
if (report.mem_mode) {
if (sort__mode == SORT_MODE__BRANCH) {
@@ -669,6 +681,7 @@ repeat:
goto error;
}
sort__mode = SORT_MODE__MEMORY;
+ symbol_conf.cumulate_callchain = false;
}
if (setup_sorting() < 0) {
--
1.9.2
--
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