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Subject[tip:perf/core] perf report: Add documentation for dynamic sort keys
Commit-ID:  4c96bee03247c6eab27287fa66457a231b9fab79
Gitweb: http://git.kernel.org/tip/4c96bee03247c6eab27287fa66457a231b9fab79
Author: Namhyung Kim <namhyung@kernel.org>
AuthorDate: Tue, 5 Jan 2016 19:58:36 +0900
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 6 Jan 2016 20:11:14 -0300

perf report: Add documentation for dynamic sort keys

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1451991518-25673-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf-report.txt | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
index ae7cd91..8a301f6 100644
--- a/tools/perf/Documentation/perf-report.txt
+++ b/tools/perf/Documentation/perf-report.txt
@@ -117,6 +117,30 @@ OPTIONS
And default sort keys are changed to comm, dso_from, symbol_from, dso_to
and symbol_to, see '--branch-stack'.

+ If the data file has tracepoint event(s), following (dynamic) sort keys
+ are also available:
+ trace, trace_fields, [<event>.]<field>[/raw]
+
+ - trace: pretty printed trace output in a single column
+ - trace_fields: fields in tracepoints in separate columns
+ - <field name>: optional event and field name for a specific field
+
+ The last form consists of event and field names. If event name is
+ omitted, it searches all events for matching field name. The matched
+ field will be shown only for the event has the field. The event name
+ supports substring match so user doesn't need to specify full subsystem
+ and event name everytime. For example, 'sched:sched_switch' event can
+ be shortened to 'switch' as long as it's not ambiguous. Also event can
+ be specified by its index (starting from 1) preceded by the '%'.
+ So '%1' is the first event, '%2' is the second, and so on.
+
+ The field name can have '/raw' suffix which disables pretty printing
+ and shows raw field value like hex numbers. The --raw-trace option
+ has the same effect for all dynamic sort keys.
+
+ The default sort keys are changed to 'trace' if all events in the data
+ file are tracepoint.
+
-F::
--fields=::
Specify output field - multiple keys can be specified in CSV format.
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