Update raven_modeling_minimal.py

raven_modeling_minimal.py

@@ -431,7 +431,7 @@ class RavenForCausalLM(RavenPreTrainedModel, GenerationMixin):
         if labels is not None:
             logits = self.lm_head(x).float()
             loss = torch.nn.functional.cross_entropy(logits.view(-1, logits.shape[-1]), labels.view(-1))
-            log_ppl = loss.clone().detach()
+            log_ppl = loss.clone().detach().exp()
         else:
             logits = self.lm_head(x).float()
             loss, log_ppl = torch.as_tensor(0.0), torch.as_tensor(0.0)