Commit ec347870 authored Jan 18, 2017 by Arnaldo Carvalho de Melo

perf ftrace: Make 'function_graph' be the default tracer



So that we can suppress the '-t function_graph' and get a more compact command
line:

  # perf ftrace usleep 123456 | grep raw_spin_lock | sort -k2 -nr | head -5
  2)   0.555 us    |                _raw_spin_lock();
  2)   0.516 us    |          _raw_spin_lock();
  2)   0.410 us    |          _raw_spin_lock_irq();
  2)   0.374 us    |                        _raw_spin_lock_irqsave();
  #

Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jeremy Eder <jeder@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ss9xgx5htpxcv86x42pnh3m6@git.kernel.org


Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent d01f4e8d

tools/perf/builtin-ftrace.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -202,6 +202,7 @@ int cmd_ftrace(int argc, const char *argv, const char prefix __maybe_unused)
		{
		int ret;
		struct perf_ftrace ftrace = {
		.tracer = "function_graph",
		.target = { .uid = UINT_MAX, },
		};
		const char * const ftrace_usage[] = {
		@@ -211,7 +212,7 @@ int cmd_ftrace(int argc, const char *argv, const char prefix __maybe_unused)
		};
		const struct option ftrace_options[] = {
		OPT_STRING('t', "tracer", &ftrace.tracer, "tracer",
		"tracer to use: function_graph or function"),
		"tracer to use: function_graph(default) or function"),
		OPT_INCR('v', "verbose", &verbose,
		"be more verbose"),
		OPT_END()