The --children option is for showing accumulated overhead (period) value as well as self overhead. It should be used with one of -g or --call-graph option.
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-top.txt | 8 +++++++- tools/perf/builtin-top.c | 7 +++++++ 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index dcfa54c851e9..180ae02137a5 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -119,7 +119,7 @@ Default is to monitor all CPUS. --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 --field will be appended @@ -161,6 +161,12 @@ Default is to monitor all CPUS. Setup and enable call-graph (stack chain/backtrace) recording, implies -g. +--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 -g/--call-graph option + enabled. + --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-top.c b/tools/perf/builtin-top.c index b101f1aa4ef0..ac6b54396828 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1097,6 +1097,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) OPT_CALLBACK(0, "call-graph", &top.record_opts, "mode[,dump_size]", record_callchain_help, &parse_callchain_opt), + OPT_BOOLEAN(0, "children", &symbol_conf.cumulate_callchain, + "Accumulate callchains of children and show total overhead as well"), OPT_INTEGER(0, "max-stack", &top.max_stack, "Set the maximum stack depth when parsing the callchain. " "Default: " __stringify(PERF_MAX_STACK_DEPTH)), @@ -1202,6 +1204,11 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused) top.sym_evsel = perf_evlist__first(top.evlist); + if (!symbol_conf.use_callchain) { + symbol_conf.cumulate_callchain = false; + perf_hpp__cancel_cumulate(); + } + symbol_conf.priv_size = sizeof(struct annotation); symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL); -- 1.9.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/