added max_sample args and metrics changes (#10602)

templates/adding_a_new_example_script/{{cookiecutter.directory_name}}/run_{{cookiecutter.example_shortcut}}.py

@@ -144,6 +144,20 @@ class DataTrainingArguments:
         default=None,
         metadata={"help": "The number of processes to use for the preprocessing."},
     )
+    max_train_samples: Optional[int] = field(
+        default=None,
+        metadata={
+            "help": "For debugging purposes or quicker training, truncate the number of training examples to this "
+            "value if set."
+        },
+    )
+    max_val_samples: Optional[int] = field(
+        default=None,
+        metadata={
+            "help": "For debugging purposes or quicker training, truncate the number of validation examples to this "
+            "value if set."
+        },
+    )
 
     def __post_init__(self):
         if self.dataset_name is None and self.train_file is None and self.validation_file is None:
@@ -317,7 +331,31 @@ def main():
     def tokenize_function(examples):
         return tokenizer(examples[text_column_name], padding="max_length", truncation=True)
 
-    tokenized_datasets = datasets.map(
+    if training_args.do_train:
+        if "train" not in datasets:
+            raise ValueError("--do_train requires a train dataset")
+        train_dataset = datasets["train"]
+        if data_args.max_train_samples is not None:
+            # Select Sample from Dataset
+            train_dataset = train_dataset.select(range(data_args.max_train_samples))
+        # tokenize train dataset in batch
+        train_dataset = train_dataset.map(
+            tokenize_function,
+            batched=True,
+            num_proc=data_args.preprocessing_num_workers,
+            remove_columns=[text_column_name],
+            load_from_cache_file=not data_args.overwrite_cache,
+        )
+
+    if training_args.do_eval:
+        if "validation" not in datasets:
+            raise ValueError("--do_eval requires a validation dataset")
+        eval_dataset = datasets["validation"]
+        # Selecting samples from dataset
+        if data_args.max_val_samples is not None:
+            eval_dataset = eval_dataset.select(range(data_args.max_val_samples))
+        # tokenize validation dataset
+        eval_dataset = eval_dataset.map(
             tokenize_function,
             batched=True,
             num_proc=data_args.preprocessing_num_workers,
@@ -332,8 +370,8 @@ def main():
     trainer = Trainer(
         model=model,
         args=training_args,
-        train_dataset=tokenized_datasets["train"] if training_args.do_train else None,
-        eval_dataset=tokenized_datasets["validation"] if training_args.do_eval else None,
+        train_dataset=train_dataset if training_args.do_train else None,
+        eval_dataset=eval_dataset if training_args.do_eval else None,
         tokenizer=tokenizer,
         data_collator=data_collator,
     )
@@ -358,33 +396,27 @@ def main():
         train_result = trainer.train(resume_from_checkpoint=checkpoint)
         trainer.save_model()  # Saves the tokenizer too for easy upload
 
-        output_train_file = os.path.join(training_args.output_dir, "train_results.txt")
-        if trainer.is_world_process_zero():
-            with open(output_train_file, "w") as writer:
-                logger.info("***** Train results *****")
-                for key, value in sorted(train_result.metrics.items()):
-                    logger.info(f"  {key} = {value}")
-                    writer.write(f"{key} = {value}\n")
+        metrics = train_result.metrics
+        max_train_samples = (
+            data_args.max_train_samples if data_args.max_train_samples is not None else len(train_dataset)
+        )
+        metrics["train_samples"] = min(max_train_samples, len(train_dataset))
 
-            # Need to save the state, since Trainer.save_model saves only the tokenizer with the model
-            trainer.state.save_to_json(os.path.join(training_args.output_dir, "trainer_state.json"))
+        trainer.log_metrics("train", metrics)
+        trainer.save_metrics("train", metrics)
+        trainer.save_state()
 
     # Evaluation
-    results = {}
     if training_args.do_eval:
         logger.info("*** Evaluate ***")
 
-        results = trainer.evaluate()
+        metrics = trainer.evaluate()
 
-        output_eval_file = os.path.join(training_args.output_dir, "eval_results_{{cookiecutter.example_shortcut}}.txt")
-        if trainer.is_world_process_zero():
-            with open(output_eval_file, "w") as writer:
-                logger.info("***** Eval results *****")
-                for key, value in sorted(results.items()):
-                    logger.info(f"  {key} = {value}")
-                    writer.write(f"{key} = {value}\n")
+        max_val_samples = data_args.max_val_samples if data_args.max_val_samples is not None else len(eval_dataset)
+        metrics["eval_samples"] = min(max_val_samples, len(eval_dataset))
 
-    return results
+        trainer.log_metrics("eval", metrics)
+        trainer.save_metrics("eval", metrics)
 
 
 def _mp_fn(index):