Merge branch 'add_timer' of https://github.com/guru4elephant/Paddle into add_timer

test=develop

paddle/fluid/framework/executor_thread_worker.cc

@@ -272,12 +272,18 @@ void ExecutorThreadWorker::TrainFilesWithTimer() {
     }
     ++batch_cnt;
     thread_scope_->DropKids();
+    if (thread_id_ == 0) {
       if (batch_cnt > 0 && batch_cnt % 1000 == 0) {
         for (size_t i = 0; i < ops_.size(); ++i) {
           fprintf(stderr, "op_name:[%zu][%s], op_mean_time:[%fs]\n", i,
                   op_name[i].c_str(), op_total_time[i] / batch_cnt);
         }
         fprintf(stderr, "mean read time: %fs\n", read_time / batch_cnt);
+        int fetch_var_num = fetch_var_names_.size();
+        for (int i = 0; i < fetch_var_num; ++i) {
+          print_fetch_var(thread_scope_, fetch_var_names_[i]);
+        }
+      }
     }
     timeline.Start();
   }