Add eval_batch_size for evaluation

src/axolotl/utils/trainer.py

@@ -47,6 +47,7 @@ def setup_trainer(cfg, train_dataset, eval_dataset, model, tokenizer):
 
     training_args = transformers.TrainingArguments(
         per_device_train_batch_size=cfg.micro_batch_size,
+        per_device_eval_batch_size=cfg.eval_batch_size,
         gradient_accumulation_steps=cfg.gradient_accumulation_steps,
         num_train_epochs=cfg.num_epochs,
         learning_rate=cfg.learning_rate,