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>

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index af47531..be9e8bc 100644 (file)
--- 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))

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 76cd510..ed99ec4 100644 (file)
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -991,6 +991,16 @@ parse_callchain_opt(const struct option *opt, const char *arg, int unset)
        return record_parse_callchain_opt(opt, arg, unset);
 }
 
+static int perf_top_config(const char *var, const char *value, void *cb)
+{
+       struct perf_top *top = cb;
+
+       if (!strcmp(var, "top.call-graph"))
+               return record_parse_callchain(value, &top->record_opts);
+
+       return perf_default_config(var, value, cb);
+}
+
 static int
 parse_percent_limit(const struct option *opt, const char *arg,
                    int unset __maybe_unused)
@@ -1115,6 +1125,8 @@ int cmd_top(int argc, const char **argv, const char *prefix __maybe_unused)
        if (top.evlist == NULL)
                return -ENOMEM;
 
+       perf_config(perf_top_config, &top);
+
        argc = parse_options(argc, argv, options, top_usage, 0);
        if (argc)
                usage_with_options(top_usage, options);

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index e84fa26..2078f33 100644 (file)
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -257,6 +257,7 @@ enum perf_call_graph_mode {
 struct record_opts {
        struct target target;
        int          call_graph;
+       bool         call_graph_enabled;
        bool         group;
        bool         inherit_stat;
        bool         no_buffering;

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index c6f8ce9..8201abe 100644 (file)
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -595,7 +595,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts)
                attr->mmap_data = track;
        }
 
-       if (opts->call_graph) {
+       if (opts->call_graph_enabled) {
                perf_evsel__set_sample_bit(evsel, CALLCHAIN);
 
                if (opts->call_graph == CALLCHAIN_DWARF) {