perf tools: Add call-graph option support into .perfconfig

Adding call-graph option support into .perfconfig file, so it's now
possible use call-graph option like:

  [top]
        call-graph = fp

  [record]
        call-graph = dwarf,8192

Above options ONLY setup the unwind method. To enable perf record/top to
actually use it the command line option -g/-G must be specified.

The --call-graph option overloads .perfconfig setup.

Assuming above configuration:

  $ perf record -g ls
  - enables dwarf unwind with user stack size dump 8192 bytes

  $ perf top -G
  - enables frame pointer unwind

  $ perf record --call-graph=fp ls
  - enables frame pointer unwind

  $ perf top --call-graph=dwarf,4096 ls
  - enables dwarf unwind with user stack size dump 4096 bytes

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1391427883-13443-2-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index af47531b82ec..be9e8bc0c4aa 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -749,6 +749,8 @@ int record_parse_callchain_opt(const struct option *opt,
 	struct record_opts *opts = opt->value;
 	int ret;
 
+	opts->call_graph_enabled = !unset;
+
 	/* --no-call-graph */
 	if (unset) {
 		opts->call_graph = CALLCHAIN_NONE;
@@ -769,6 +771,8 @@ int record_callchain_opt(const struct option *opt,
 {
 	struct record_opts *opts = opt->value;
 
+	opts->call_graph_enabled = !unset;
+
 	if (opts->call_graph == CALLCHAIN_NONE)
 		opts->call_graph = CALLCHAIN_FP;
 
@@ -776,6 +780,16 @@ int record_callchain_opt(const struct option *opt,
 	return 0;
 }
 
+static int perf_record_config(const char *var, const char *value, void *cb)
+{
+	struct record *rec = cb;
+
+	if (!strcmp(var, "record.call-graph"))
+		return record_parse_callchain(value, &rec->opts);
+
+	return perf_default_config(var, value, cb);
+}
+
 static const char * const record_usage[] = {
 	"perf record [<options>] [<command>]",
 	"perf record [<options>] -- <command> [<options>]",
@@ -907,6 +921,8 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
 	if (rec->evlist == NULL)
 		return -ENOMEM;
 
+	perf_config(perf_record_config, rec);
+
 	argc = parse_options(argc, argv, record_options, record_usage,
 			    PARSE_OPT_STOP_AT_NON_OPTION);
 	if (!argc && target__none(&rec->opts.target))