1 files changed, 9 insertions, 1 deletions

diff --git a/tools/perf/builtin-lock.c b/tools/perf/builtin-lock.c
index 972310cbeb63..6a9076f165f4 100644
--- a/tools/perf/builtin-lock.c
+++ b/tools/perf/builtin-lock.c
@@ -56,7 +56,9 @@ struct lock_stat {
 
         unsigned int            nr_readlock;
         unsigned int            nr_trylock;
+
         /* these times are in nano sec. */
+        u64                     avg_wait_time;
         u64                     wait_time_total;
         u64                     wait_time_min;
         u64                     wait_time_max;
@@ -208,6 +210,7 @@ static struct thread_stat *thread_stat_findnew_first(u32 tid)
 
 SINGLE_KEY(nr_acquired)
 SINGLE_KEY(nr_contended)
+SINGLE_KEY(avg_wait_time)
 SINGLE_KEY(wait_time_total)
 SINGLE_KEY(wait_time_max)
 
@@ -244,6 +247,7 @@ static struct rb_root		result;	/* place to store sorted data */
 struct lock_key keys[] = {
         DEF_KEY_LOCK(acquired, nr_acquired),
         DEF_KEY_LOCK(contended, nr_contended),
+        DEF_KEY_LOCK(avg_wait, avg_wait_time),
         DEF_KEY_LOCK(wait_total, wait_time_total),
         DEF_KEY_LOCK(wait_min, wait_time_min),
         DEF_KEY_LOCK(wait_max, wait_time_max),
@@ -516,6 +520,7 @@ static int report_lock_acquired_event(struct perf_evsel *evsel,
 
         seq->state = SEQ_STATE_ACQUIRED;
         ls->nr_acquired++;
+        ls->avg_wait_time = ls->nr_contended ? ls->wait_time_total/ls->nr_contended : 0;
         seq->prev_event_time = sample->time;
 end:
         return 0;
@@ -570,6 +575,7 @@ static int report_lock_contended_event(struct perf_evsel *evsel,
 
         seq->state = SEQ_STATE_CONTENDED;
         ls->nr_contended++;
+        ls->avg_wait_time = ls->wait_time_total/ls->nr_contended;
         seq->prev_event_time = sample->time;
 end:
         return 0;
@@ -703,6 +709,7 @@ static void print_result(void)
         pr_info("%10s ", "acquired");
         pr_info("%10s ", "contended");
 
+        pr_info("%15s ", "avg wait (ns)");
         pr_info("%15s ", "total wait (ns)");
         pr_info("%15s ", "max wait (ns)");
         pr_info("%15s ", "min wait (ns)");
@@ -734,6 +741,7 @@ static void print_result(void)
                 pr_info("%10u ", st->nr_acquired);
                 pr_info("%10u ", st->nr_contended);
 
+                pr_info("%15" PRIu64 " ", st->avg_wait_time);
                 pr_info("%15" PRIu64 " ", st->wait_time_total);
                 pr_info("%15" PRIu64 " ", st->wait_time_max);
                 pr_info("%15" PRIu64 " ", st->wait_time_min == ULLONG_MAX ?
@@ -940,7 +948,7 @@ int cmd_lock(int argc, const char **argv, const char *prefix __maybe_unused)
         };
         const struct option report_options[] = {
         OPT_STRING('k', "key", &sort_key, "acquired",
-                    "key for sorting (acquired / contended / wait_total / wait_max / wait_min)"),
+                    "key for sorting (acquired / contended / avg_wait / wait_total / wait_max / wait_min)"),
         /* TODO: type */
         OPT_END()
         };