diff options
| author | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-01-19 03:49:14 +0300 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2017-01-26 17:43:01 +0300 |
| commit | ec347870a9d423a4b88657d6a85b5163b3f949ee (patch) | |
| tree | 72455f4abe80313743cb192bbed0b5fb85a5d3c7 /tools/perf/builtin-ftrace.c | |
| parent | d01f4e8db22cf4d04f6c86351d959b584eb1f5f7 (diff) | |
| download | linux-ec347870a9d423a4b88657d6a85b5163b3f949ee.tar.xz | |
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>
Diffstat (limited to 'tools/perf/builtin-ftrace.c')
| -rw-r--r-- | tools/perf/builtin-ftrace.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index c320ae25c8e6..d05658d2b8f1 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -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() |