fix executable batch size issue (#24067)

* fix executable batch size issue

* fix

* undo

src/transformers/trainer.py

@@ -1650,6 +1650,7 @@ class Trainer:
     def _inner_training_loop(
         self, batch_size=None, args=None, resume_from_checkpoint=None, trial=None, ignore_keys_for_eval=None
     ):
+        self.accelerator.free_memory()
         self._train_batch_size = batch_size
         logger.debug(f"Currently training with a batch size of: {self._train_batch_size}")
         # Data loader and number of training steps