From dd3092075c3263fca7a3e98b143ad2296aab71b4 Mon Sep 17 00:00:00 2001 From: Namhyung Kim Date: Wed, 22 Apr 2015 15:33:45 +0900 Subject: perf tools: Document --children option in more detail As the --children option changes the output of perf report (and perf top) it sometimes confuses users. Add more words and examples to help understanding of the option's behavior - and how to disable it ;-). Signed-off-by: Namhyung Kim Reviewed-by: Ingo Molnar Cc: David Ahern Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Taeung Song Link: http://lkml.kernel.org/r/1429684425-14987-1-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/Documentation/perf-top.txt | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'tools/perf/Documentation/perf-top.txt') diff --git a/tools/perf/Documentation/perf-top.txt b/tools/perf/Documentation/perf-top.txt index 3265b1070518..9e5b07eb7d35 100644 --- a/tools/perf/Documentation/perf-top.txt +++ b/tools/perf/Documentation/perf-top.txt @@ -168,7 +168,7 @@ Default is to monitor all CPUS. 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. + enabled. See the `overhead calculation' section for more details. --max-stack:: Set the stack depth limit when parsing the callchain, anything @@ -234,6 +234,7 @@ INTERACTIVE PROMPTING KEYS Pressing any unmapped key displays a menu, and prompts for input. +include::callchain-overhead-calculation.txt[] SEE ALSO -------- -- cgit v1.2.3-70-g09d2