Update lerobot/scripts/train.py

Co-authored-by: Remi <re.cadene@gmail.com>

lerobot/scripts/train.py

@@ -171,7 +171,7 @@ def log_train_info(logger: Logger, info, step, cfg, dataset, is_offline):
         f"lr:{lr:0.1e}",
         # in seconds
         f"updt_s:{update_s:.3f}",
-        f"dataloading_s:{dataloading_s:.3f}",
+        f"data_s:{dataloading_s:.3f}",  # if not ~0, you are bottlenecked by cpu or io
     ]
     logging.info(" ".join(log_items))