[booster] update prepare dataloader method for plugin (#3706)

* [booster] add prepare dataloader method for plug

* [booster] update examples and docstr

colossalai/booster/plugin/dp_plugin_base.py

@@ -20,21 +20,19 @@ class DPPluginBase(Plugin):
         self.rank = dist.get_rank()
         self.world_size = dist.get_world_size()
 
-    def prepare_train_dataloader(self,
-                                 dataset,
-                                 batch_size,
-                                 shuffle=False,
-                                 seed=1024,
-                                 drop_last=False,
-                                 pin_memory=False,
-                                 num_workers=0,
-                                 **kwargs):
+    def prepare_dataloader(self,
+                           dataset,
+                           batch_size,
+                           shuffle=False,
+                           seed=1024,
+                           drop_last=False,
+                           pin_memory=False,
+                           num_workers=0,
+                           **kwargs):
         r"""
         Prepare a dataloader for distributed training. The dataloader will be wrapped by
         `torch.utils.data.DataLoader` and `torch.utils.data.DistributedSampler`.
 
-        Note:
-            1. Evaluation datasets should not be passed to this function.
 
         Args:
             dataset (`torch.utils.data.Dataset`): The dataset to be loaded.

colossalai/booster/plugin/gemini_plugin.py

@@ -156,7 +156,7 @@ class GeminiPlugin(DPPluginBase):
         >>> model, train_dataset, optimizer, criterion = ...
         >>> plugin = GeminiPlugin()
 
-        >>> train_dataloader = plugin.prepare_train_dataloader(train_dataset, batch_size=8)
+        >>> train_dataloader = plugin.prepare_dataloader(train_dataset, batch_size=8)
         >>> booster = Booster(plugin=plugin)
         >>> model, optimizer, train_dataloader, criterion = booster.boost(model, optimizer, train_dataloader, criterion)
 

colossalai/booster/plugin/low_level_zero_plugin.py

@@ -95,7 +95,7 @@ class LowLevelZeroPlugin(DPPluginBase):
         >>> model, train_dataset, optimizer, criterion = ...
         >>> plugin = LowLevelZeroPlugin()
 
-        >>> train_dataloader = plugin.prepare_train_dataloader(train_dataset, batch_size=8)
+        >>> train_dataloader = plugin.prepare_dataloader(train_dataset, batch_size=8)
         >>> booster = Booster(plugin=plugin)
         >>> model, optimizer, train_dataloader, criterion = booster.boost(model, optimizer, train_dataloader, criterion)
 

colossalai/booster/plugin/plugin_base.py

@@ -4,7 +4,7 @@ from typing import Callable, List, Tuple, Union
 import torch.nn as nn
 from torch.optim import Optimizer
 from torch.optim.lr_scheduler import _LRScheduler as LRScheduler
-from torch.utils.data import DataLoader
+from torch.utils.data import DataLoader, Dataset
 
 from colossalai.checkpoint_io import CheckpointIO
 from colossalai.interface import OptimizerWrapper
@@ -59,3 +59,18 @@ class Plugin(ABC):
         Get checkpoint io object for this plugin, only invoked when control_checkpoint_io is True.
         """
         pass
+
+    @abstractmethod
+    def prepare_dataloader(self,
+                           dataset: Dataset,
+                           batch_size: int,
+                           shuffle: bool = False,
+                           seed: int = 1024,
+                           drop_last: bool = False,
+                           pin_memory: bool = False,
+                           num_workers: int = 0,
+                           **kwargs):
+        """Prepare a dataloader for distributed training. The dataloader will be wrapped by
+        `torch.utils.data.DataLoader`
+        """
+        pass

colossalai/booster/plugin/torch_ddp_plugin.py

@@ -72,7 +72,7 @@ class TorchDDPPlugin(DPPluginBase):
         >>> model, train_dataset, optimizer, criterion = ...
         >>> plugin = TorchDDPPlugin()
 
-        >>> train_dataloader = plugin.prepare_train_dataloader(train_dataset, batch_size=8)
+        >>> train_dataloader = plugin.prepare_dataloader(train_dataset, batch_size=8)
         >>> booster = Booster(plugin=plugin)
         >>> model, optimizer, train_dataloader, criterion = booster.boost(model, optimizer, train_dataloader, criterion)
 

examples/tutorial/new_api/cifar_resnet/train.py

@@ -49,14 +49,8 @@ def build_dataloader(batch_size: int, coordinator: DistCoordinator, plugin: DPPl
                                                     download=True)
 
     # Data loader
-    train_dataloader = plugin.prepare_train_dataloader(train_dataset,
-                                                       batch_size=batch_size,
-                                                       shuffle=True,
-                                                       drop_last=True)
-    test_dataloader = plugin.prepare_train_dataloader(test_dataset,
-                                                      batch_size=batch_size,
-                                                      shuffle=False,
-                                                      drop_last=False)
+    train_dataloader = plugin.prepare_dataloader(train_dataset, batch_size=batch_size, shuffle=True, drop_last=True)
+    test_dataloader = plugin.prepare_dataloader(test_dataset, batch_size=batch_size, shuffle=False, drop_last=False)
     return train_dataloader, test_dataloader
 
 

examples/tutorial/new_api/cifar_vit/train.py

@@ -63,14 +63,8 @@ def build_dataloader(batch_size: int, coordinator: DistCoordinator, plugin: DPPl
                                                     download=True)
 
     # Data loader
-    train_dataloader = plugin.prepare_train_dataloader(train_dataset,
-                                                       batch_size=batch_size,
-                                                       shuffle=True,
-                                                       drop_last=True)
-    test_dataloader = plugin.prepare_train_dataloader(test_dataset,
-                                                      batch_size=batch_size,
-                                                      shuffle=False,
-                                                      drop_last=False)
+    train_dataloader = plugin.prepare_dataloader(train_dataset, batch_size=batch_size, shuffle=True, drop_last=True)
+    test_dataloader = plugin.prepare_dataloader(test_dataset, batch_size=batch_size, shuffle=False, drop_last=False)
     return train_dataloader, test_dataloader
 
 

examples/tutorial/new_api/glue_bert/data.py

@@ -84,26 +84,26 @@ class GLUEDataBuilder:
         AutoTokenizer.from_pretrained(self.model_name_or_path, use_fast=True)
 
     def train_dataloader(self):
-        return self.plugin.prepare_train_dataloader(self.dataset["train"],
-                                                    batch_size=self.train_batch_size,
-                                                    shuffle=True,
-                                                    drop_last=True)
+        return self.plugin.prepare_dataloader(self.dataset["train"],
+                                              batch_size=self.train_batch_size,
+                                              shuffle=True,
+                                              drop_last=True)
 
     def val_dataloader(self):
         if len(self.eval_splits) == 1:
-            return self.plugin.prepare_train_dataloader(self.dataset["validation"], batch_size=self.eval_batch_size)
+            return self.plugin.prepare_dataloader(self.dataset["validation"], batch_size=self.eval_batch_size)
         elif len(self.eval_splits) > 1:
             return [
-                self.plugin.prepare_train_dataloader(self.dataset[x], batch_size=self.eval_batch_size)
+                self.plugin.prepare_dataloader(self.dataset[x], batch_size=self.eval_batch_size)
                 for x in self.eval_splits
             ]
 
     def test_dataloader(self):
         if len(self.eval_splits) == 1:
-            return self.plugin.prepare_train_dataloader(self.dataset["test"], batch_size=self.eval_batch_size)
+            return self.plugin.prepare_dataloader(self.dataset["test"], batch_size=self.eval_batch_size)
         elif len(self.eval_splits) > 1:
             return [
-                self.plugin.prepare_train_dataloader(self.dataset[x], batch_size=self.eval_batch_size)
+                self.plugin.prepare_dataloader(self.dataset[x], batch_size=self.eval_batch_size)
                 for x in self.eval_splits
             ]
 

tests/test_booster/test_plugin/test_dp_plugin_base.py

@@ -55,7 +55,7 @@ def check_dataloader_sharding():
 
     # create a custom dasetset with 0 to 10
     dataset = TensorDataset(torch.arange(0, 10))
-    train_dataloader = plugin.prepare_train_dataloader(dataset, batch_size=2)
+    train_dataloader = plugin.prepare_dataloader(dataset, batch_size=2)
 
     # get the first batch of data
     batch = next(iter(train_dataloader))[0].cuda()