fix performance jitter for googlenet train

model_zoo/official/cv/googlenet/train.py

@@ -205,5 +205,9 @@ if __name__ == '__main__':
     ckpoint_cb = ModelCheckpoint(prefix="train_googlenet_" + args_opt.dataset_name, directory=ckpt_save_dir,
                                  config=config_ck)
     loss_cb = LossMonitor()
-    model.train(cfg.epoch_size, dataset, callbacks=[time_cb, ckpoint_cb, loss_cb])
+
+    cbs = [time_cb, ckpoint_cb, loss_cb]
+    if device_num > 1 and rank != 0:
+        cbs = [time_cb, loss_cb]
+    model.train(cfg.epoch_size, dataset, callbacks=cbs)
     print("train success")