crimson/osd: report the average reactor utilization

Signed-off-by: Yingxin Cheng <[email protected]>

Author: cyx1231st

src/crimson/osd/osd.cc

@@ -411,11 +411,16 @@ seastar::future<> OSD::start()
             shard_stats[seastar::this_shard_id()] = stats;
           }).then([this, FNAME] {
             std::ostringstream oss;
+            double agg_ru = 0;
+            int cnt = 0;
             for (const auto &stats : shard_stats) {
+              agg_ru += stats.reactor_utilization;
+              ++cnt;
               oss << int(stats.reactor_utilization);
               oss << ",";
             }
-            INFO("reactor_utilizations: {}", oss.str());
+            INFO("reactor_utilizations: {}({})",
+                 int(agg_ru/cnt), oss.str());
           });
         });
         gate.dispatch_in_background("stats_store", *this, [this] {