perf stat record: Synthesize event update events

Synthesize other events stuff not carried within attr event - unit,
scale, name.

Reported-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1446734469-11352-11-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 10f86a6d7b15..575e2535ea03 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -351,8 +351,19 @@ static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *inf
         workload_exec_errno = info->si_value.sival_int;
 }
 
+static bool has_unit(struct perf_evsel *counter)
+{
+        return counter->unit && *counter->unit;
+}
+
+static bool has_scale(struct perf_evsel *counter)
+{
+        return counter->scale != 1;
+}
+
 static int perf_stat_synthesize_config(bool is_pipe)
 {
+        struct perf_evsel *counter;
         int err;
 
         if (is_pipe) {
@@ -364,6 +375,54 @@ static int perf_stat_synthesize_config(bool is_pipe)
                 }
         }
 
+        /*
+         * Synthesize other events stuff not carried within
+         * attr event - unit, scale, name
+         */
+        evlist__for_each(evsel_list, counter) {
+                if (!counter->supported)
+                        continue;
+
+                /*
+                 * Synthesize unit and scale only if it's defined.
+                 */
+                if (has_unit(counter)) {
+                        err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
+                        if (err < 0) {
+                                pr_err("Couldn't synthesize evsel unit.\n");
+                                return err;
+                        }
+                }
+
+                if (has_scale(counter)) {
+                        err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
+                        if (err < 0) {
+                                pr_err("Couldn't synthesize evsel scale.\n");
+                                return err;
+                        }
+                }
+
+                if (counter->own_cpus) {
+                        err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
+                        if (err < 0) {
+                                pr_err("Couldn't synthesize evsel scale.\n");
+                                return err;
+                        }
+                }
+
+                /*
+                 * Name is needed only for pipe output,
+                 * perf.data carries event names.
+                 */
+                if (is_pipe) {
+                        err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
+                        if (err < 0) {
+                                pr_err("Couldn't synthesize evsel name.\n");
+                                return err;
+                        }
+                }
+        }
+
         err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
                                                 process_synthesized_event,
                                                 NULL);