Update model_checkpoint.py

Author: ananthsub

pytorch_lightning/callbacks/model_checkpoint.py

@@ -211,6 +211,7 @@ def on_train_batch_end(self, trainer, pl_module, outputs, batch, batch_idx, data
             return
         step = trainer.global_step
         skip_batch = self.every_n_batches < 1 or ((step + 1) % self.every_n_batches != 0)
+        log.warning(f"in on_train_batch_end at step {step}, every_n_batches={self.every_n_batches}, going to skip batch? {skip_batch}")
         if skip_batch:
             return
         self.save_checkpoint(trainer, pl_module)