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.
Cc: Arun Sharma <[email protected]> Cc: Frederic Weisbecker <[email protected]> Signed-off-by: Namhyung Kim <[email protected]> --- tools/perf/Documentation/perf-top.txt | 6 ++++++ tools/perf/builtin-top.c | 7 +++++++ 2 files changed, 13 insertions(+) diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index cdd8d4946dba..01b6fd1a4428 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -149,6 +149,12 @@ 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 cf330c66bed7..fa34bcbca587 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -1078,6 +1078,8 @@ 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)), @@ -1177,6 +1179,11 @@ 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); -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
