[PATCH v2 08/27] perf stat: Uniquify hybrid event name

[Jin Yao]

It would be useful to tell user the pmu which the event belongs to.
perf-stat has supported '--no-merge' option and it can print the pmu
name after the event name, such as:

"cycles [cpu_core]"

Now this option is enabled by default for hybrid platform but change
the format to:

"cpu_core/cycles/"

Signed-off-by: Jin Yao <yao....@linux.intel.com>
---
 tools/perf/builtin-stat.c      |  3 +++
 tools/perf/util/stat-display.c | 12 ++++++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 68ecf68699a9..6c0a21323814 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2390,6 +2390,9 @@ int cmd_stat(int argc, const char **argv)
 
        evlist__check_cpu_maps(evsel_list);
 
+       if (perf_pmu__hybrid_exist())
+               stat_config.no_merge = true;
+
        /*
         * Initialize thread_map with comm names,
         * so we could print it out on output.
diff --git a/tools/perf/util/stat-display.c b/tools/perf/util/stat-display.c
index 7f09cdaf5b60..ed37d8e7ea1a 100644
--- a/tools/perf/util/stat-display.c
+++ b/tools/perf/util/stat-display.c
@@ -526,6 +526,7 @@ static void uniquify_event_name(struct evsel *counter)
 {
        char *new_name;
        char *config;
+       int ret;
 
        if (counter->uniquified_name ||
            !counter->pmu_name || !strncmp(counter->name, counter->pmu_name,
@@ -540,8 +541,15 @@ static void uniquify_event_name(struct evsel *counter)
                        counter->name = new_name;
                }
        } else {
-               if (asprintf(&new_name,
-                            "%s [%s]", counter->name, counter->pmu_name) > 0) {
+               if (perf_pmu__hybrid_exist()) {
+                       ret = asprintf(&new_name, "%s/%s/",
+                                      counter->pmu_name, counter->name);
+               } else {
+                       ret = asprintf(&new_name, "%s [%s]",
+                                      counter->name, counter->pmu_name);
+               }
+
+               if (ret) {
                        free(counter->name);
                        counter->name = new_name;
                }
-- 
2.17.1