diff --git a/fastNLP/core/drivers/paddle_driver/dist_utils.py b/fastNLP/core/drivers/paddle_driver/dist_utils.py
index 3bfbbd4f..4d9ae5f0 100644
--- a/fastNLP/core/drivers/paddle_driver/dist_utils.py
+++ b/fastNLP/core/drivers/paddle_driver/dist_utils.py
@@ -1,4 +1,5 @@
 import io
+import os
 import pickle
 _pickler = pickle.Pickler
 _unpickler = pickle.Unpickler
@@ -7,6 +8,7 @@ from typing import Any, List
 from fastNLP.envs.imports import _TORCH_GREATER_EQUAL_1_8
 from fastNLP.core.utils.torch_utils import DEFAULT_TORCH_GROUP
 from fastNLP.envs.imports import _NEED_IMPORT_TORCH
+from fastNLP.envs.env import FASTNLP_NO_SYNC
 if _NEED_IMPORT_TORCH:
     import torch
     from torch import distributed as dist
@@ -83,6 +85,14 @@ def fastnlp_paddle_gather_object(obj, object_gather_list=None, dst=0, group=DEFA
         >>> output
         ['foo', 12, {1: 2}]
     """
+    if int(os.environ.get(FASTNLP_NO_SYNC, '0')) == 2:
+        return [obj]
+
+    if dist.get_rank() == dst:
+        object_gather_list = [None for _ in range(dist.get_world_size(group))]
+    else:
+        object_gather_list = None
+
     if group is None:
         group = DEFAULT_TORCH_GROUP
 
@@ -207,6 +217,9 @@ def fastnlp_paddle_all_gather(obj: Any, device=None, group=DEFAULT_TORCH_GROUP)
     :param group:
     :return: 返回的结果是 [obj0, obj1, ...]，其中 obj_i 即为第 i 个 rank 上的 obj 。
     """
+    if int(os.environ.get(FASTNLP_NO_SYNC, '0')) == 2:
+        return [obj]
+
     if group is None:
         group = DEFAULT_TORCH_GROUP
     if isinstance(obj, torch.Tensor):
@@ -233,6 +246,12 @@ def fastnlp_torch_broadcast_object(obj, src, device=None, group=DEFAULT_TORCH_GR
     :param group:
     :return:
     """
+    if int(os.environ.get(FASTNLP_NO_SYNC, '0')) == 2:
+        if src == dist.get_rank(group):
+            return obj
+        else:
+            return None
+
     if group is None:
         group = DEFAULT_TORCH_GROUP
     cur_rank = dist.get_rank(group)
@@ -328,6 +347,9 @@ def all_gather_object(object_list, obj, group=None):
         >>> output
         ['foo', 12, {1: 2}]
     """
+    if int(os.environ.get(FASTNLP_NO_SYNC, '0')) == 2:
+        return [obj]
+
     if dist.distributed_c10d._rank_not_in_group(group):
         return
     if _TORCH_GREATER_EQUAL_1_8:
diff --git a/fastNLP/core/drivers/paddle_driver/fleet.py b/fastNLP/core/drivers/paddle_driver/fleet.py
index 6e2c85ee..c407ab9f 100644
--- a/fastNLP/core/drivers/paddle_driver/fleet.py
+++ b/fastNLP/core/drivers/paddle_driver/fleet.py
@@ -1,6 +1,5 @@
 import os
 import shutil
-from functools import partial
 from typing import List, Union, Optional, Dict, Tuple, Callable
 
 from .paddle_driver import PaddleDriver
@@ -30,7 +29,7 @@ from fastNLP.core.samplers import (
     re_instantiate_sampler,
     conversion_between_reproducible_and_unrepeated_sampler,
 )
-from fastNLP.envs.env import FASTNLP_DISTRIBUTED_CHECK, FASTNLP_GLOBAL_SEED
+from fastNLP.envs.env import FASTNLP_DISTRIBUTED_CHECK, FASTNLP_GLOBAL_SEED, FASTNLP_NO_SYNC
 from fastNLP.core.log import logger
 
 if _NEED_IMPORT_PADDLE:
@@ -38,7 +37,6 @@ if _NEED_IMPORT_PADDLE:
     from paddle import DataParallel
     import paddle.distributed.fleet as fleet
     import paddle.distributed as paddledist
-    from paddle.io import BatchSampler
     from paddle.optimizer import Optimizer
     from paddle.fluid.reader import _DatasetKind
     from paddle.fluid.dygraph import parallel_helper
@@ -236,7 +234,8 @@ class PaddleFleetDriver(PaddleDriver):
         self.global_rank = paddledist.get_rank()
 
     def barrier(self):
-        paddledist.barrier()
+        if int(os.environ.get(FASTNLP_NO_SYNC, 0)) < 1:  # 当 FASTNLP_NO_SYNC 小于 1 时实际执行
+            paddledist.barrier()
 
     def configure_fleet(self):
         if not self._has_fleetwrapped and not isinstance(self.model, DataParallel):
@@ -305,7 +304,7 @@ class PaddleFleetDriver(PaddleDriver):
                 raise RuntimeError(f"There is no `{fn}` method in your model.")
         else:
             if hasattr(model, fn):
-                logger.warning("Notice your model is a `DistributedDataParallel` model. And your model also implements "
+                logger.warning("Notice your model is a `DataParallel` model. And your model also implements "
                                f"the `{fn}` method, which we can not call actually, we will"
                                " call `forward` function instead of `train_step` and you should note that.")
             elif fn not in {"train_step", "evaluate_step"}:
@@ -453,6 +452,8 @@ class PaddleFleetDriver(PaddleDriver):
             接收到的参数；如果是 source 端则返回发射的内容；既不是发送端、又不是接收端，则返回 None 。
         """
         return
+        if int(os.environ.get(FASTNLP_NO_SYNC, 0)) == 2:  # 如果 FASTNLP_NO_SYNC == 2 直接返回。
+            return
         return fastnlp_paddle_broadcast_object(obj, src, device=self.data_device, group=group)
 
     def all_gather(self, obj, group) -> List:
@@ -479,4 +480,6 @@ class PaddleFleetDriver(PaddleDriver):
         :return:
         """
         return
+        if int(os.environ.get(FASTNLP_NO_SYNC, 0)) == 2:  # 如果 FASTNLP_NO_SYNC 表示不执行
+            return [obj]
         return fastnlp_paddle_all_gather(obj, group=group)
diff --git a/fastNLP/core/drivers/paddle_driver/paddle_driver.py b/fastNLP/core/drivers/paddle_driver/paddle_driver.py
index 3b8ad7d8..fe8bf404 100644
--- a/fastNLP/core/drivers/paddle_driver/paddle_driver.py
+++ b/fastNLP/core/drivers/paddle_driver/paddle_driver.py
@@ -7,7 +7,7 @@ from dataclasses import dataclass
 
 import numpy as np
 
-from .utils import _build_fp16_env, optimizer_state_to_device
+from .utils import _build_fp16_env, optimizer_state_to_device, DummyGradScaler
 from fastNLP.envs.imports import _NEED_IMPORT_PADDLE
 from fastNLP.core.drivers.driver import Driver
 from fastNLP.core.utils import apply_to_collection, paddle_move_data_to_device
@@ -247,18 +247,27 @@ class PaddleDriver(Driver):
             #  会造成多余实际消耗的问题。
             num_consumed_samples_array = sampler_states.pop('num_consumed_samples_array', None)
             if num_consumed_samples_array is not None:
-                if isinstance(sampler, ReproducibleSampler):  
-                    # 如果是 sampler 的话，需要计算出实际的 sample 数目
-                    try:
+                if isinstance(sampler, ReproducibleSampler):  # 如果是 sampler 的话，需要考虑 batch_size 。
+                    if dataloader_args.batch_size is not None:
                         num_consumed_batches = num_consumed_batches * dataloader_args.batch_size
-                    except:  # 有可能 batch_size 为 None，就只有损失精度了
+                    else:  # 有可能 batch_size 为 None，就只有损失精度了
+                        logger.warning("fastNLP cannot get batch_size, we have to save based on `num_consumed_samples`, "
+                                     "it may cause missing some samples when reload.")
                         num_consumed_batches = sampler_states['num_consumed_samples']
                 sampler_states['num_consumed_samples'] = num_consumed_samples_array[num_consumed_batches]
                 assert sampler_states['num_consumed_samples'] != -1, "This is a bug, please report."
-            states['sampler_states'] = sampler_states
+            else:
+                if dataloader_args.batch_size is not None:
+                    sampler_states['num_consumed_samples'] = sampler.num_replicas * dataloader_args.batch_size \
+                                                             * num_consumed_batches
+                else:
+                    logger.warning("fastNLP cannot get batch_size, we have to save based on `num_consumed_samples`, "
+                                 "it may cause missing some samples when reload.")
         else:
             raise RuntimeError(
                 "The sampler has no `state_dict()` method, it will fail to recover to the specific batch.")
+        
+        states['sampler_states'] = sampler_states
 
         # 2. 保存模型的状态；
         if should_save_model:
@@ -278,6 +287,12 @@ class PaddleDriver(Driver):
 
         logger.debug("Save optimizer state dict.")
         states["optimizers_state_dict"] = optimizers_state_dict
+
+        # 4.保存fp16的状态
+        if not isinstance(self.grad_scaler, DummyGradScaler):
+            grad_scaler_state_dict = self.grad_scaler.state_dict()
+            states['grad_scaler_state_dict'] = grad_scaler_state_dict
+
         paddle.save(states, str(folder.joinpath(FASTNLP_CHECKPOINT_FILENAME)))
 
     def load(self, folder: Path, dataloader, only_state_dict: bool = True, should_load_model: bool = True, **kwargs) -> Dict:
@@ -285,7 +300,7 @@ class PaddleDriver(Driver):
         states = paddle.load(str(folder.joinpath(FASTNLP_CHECKPOINT_FILENAME)))
 
         # 1. 加载 optimizers 的状态；
-        optimizers_state_dict = states["optimizers_state_dict"]
+        optimizers_state_dict = states.pop("optimizers_state_dict")
         for i in range(len(self.optimizers)):
             optimizer: Optimizer = self.optimizers[i]
             optimizer.set_state_dict(optimizers_state_dict[f"optimizer{i}"])
@@ -295,18 +310,32 @@ class PaddleDriver(Driver):
         if should_load_model:
             self.load_model(folder.joinpath(FASTNLP_MODEL_FILENAME), only_state_dict)
             if only_state_dict:
-                logger.debug("Load model state dict.")
+                logger.debug("Load model state dict...")
             else:
-                logger.debug("Load model.")
-
-        # 3. 恢复 sampler 的状态；
+                logger.debug("Load model...")
+
+        # 3. 加载fp16的状态；
+        if "grad_scaler_state_dict" in states:
+            grad_scaler_state_dict = states.pop("grad_scaler_state_dict")
+            if isinstance(self.grad_scaler, DummyGradScaler):
+                self.auto_cast, _grad_scaler = _build_fp16_env(dummy=False)
+                self.grad_scaler = _grad_scaler()
+                self.fp16 = True
+            self.grad_scaler.load_state_dict(grad_scaler_state_dict)
+            logger.debug("Load grad_scaler state dict...")
+        elif not isinstance(self.grad_scaler, DummyGradScaler):
+            logger.warning(f"Checkpoint {folder} is not trained with fp16=True, while resume to a fp16=True training, "
+                           f"the training process may be unstable.")
+
+        # 4. 恢复 sampler 的状态；
         dataloader_args = self.get_dataloader_args(dataloader)
         if isinstance(dataloader_args.batch_sampler, ReproducibleBatchSampler):
             sampler = dataloader_args.batch_sampler
         elif isinstance(dataloader_args.sampler, ReproducibleSampler):
             sampler = dataloader_args.sampler
         elif self.is_distributed():
-            raise RuntimeError("It is not allowed to use checkpoint retraining when you do not use our or `ReproducibleSampler`.")
+            raise RuntimeError("It is not allowed to use checkpoint retraining when you do not use our or "
+                               "`ReproducibleSampler`.")
         else:
             sampler = RandomBatchSampler(
                 batch_sampler=dataloader_args.batch_sampler if dataloader_args.batch_sampler is not None else dataloader_args.sampler,
@@ -316,7 +345,7 @@ class PaddleDriver(Driver):
         sampler.load_state_dict(states["sampler_states"])
         states["dataloader"] = self.set_dist_repro_dataloader(dataloader, sampler)
 
-        # 4. 修改 trainer_state.batch_idx_in_epoch
+        # 5. 修改 trainer_state.batch_idx_in_epoch
         # sampler 是类似 RandomSampler 的sampler，不是 batch_sampler；
         if not isinstance(sampler, ReproducibleBatchSampler):
             if dataloader_args.drop_last:
diff --git a/fastNLP/core/drivers/paddle_driver/utils.py b/fastNLP/core/drivers/paddle_driver/utils.py
index feb5c3eb..48598a34 100644
--- a/fastNLP/core/drivers/paddle_driver/utils.py
+++ b/fastNLP/core/drivers/paddle_driver/utils.py
@@ -19,7 +19,7 @@ if _NEED_IMPORT_PADDLE:
     import paddle
     from paddle import nn
     from paddle.nn import Layer
-    from paddle.io import DataLoader, BatchSampler, Dataset
+    from paddle.io import DataLoader, BatchSampler
     from paddle.amp import auto_cast, GradScaler
 else:
     from fastNLP.core.utils.dummy_class import DummyClass as Layer
@@ -140,8 +140,7 @@ class DummyGradScaler:
 
 def _build_fp16_env(dummy=False):
     if dummy:
-        auto_cast = ExitStack
-        GradScaler = DummyGradScaler
+        return ExitStack, DummyGradScaler
     else:
         if not paddle.device.is_compiled_with_cuda():
             raise RuntimeError("No cuda")
@@ -150,7 +149,7 @@ def _build_fp16_env(dummy=False):
                 "NOTE: your device does NOT support faster training with fp16, "
                 "please switch to FP32 which is likely to be faster"
             )
-    return auto_cast, GradScaler
+            return auto_cast, GradScaler
 
 def find_free_ports(num):
     def __free_port():
diff --git a/fastNLP/core/samplers/reproducible_batch_sampler.py b/fastNLP/core/samplers/reproducible_batch_sampler.py
index be43bc74..e8acc645 100644
--- a/fastNLP/core/samplers/reproducible_batch_sampler.py
+++ b/fastNLP/core/samplers/reproducible_batch_sampler.py
@@ -19,7 +19,7 @@ from abc import abstractmethod
 
 class ReproducibleBatchSampler:
     def __init__(self, **kwargs):
-        pass
+        self.num_replicas = 1
 
     @abstractmethod
     def set_distributed(self, num_replicas, rank, pad=True):
@@ -53,14 +53,6 @@ class ReproducibleBatchSampler:
     def batch_idx_in_epoch(self):
         raise NotImplementedError("Each specific batch_sampler should implement its own `batch_idx_in_epoch` property.")
 
-    @property
-    def num_replicas(self):
-        return self._num_replicas
-
-    @num_replicas.setter
-    def num_replicas(self, value):
-        self._num_replicas = value
-
 
 class RandomBatchSampler(ReproducibleBatchSampler):
     # 这两个参数的值应当交给 driver 的 get_dataloader_args 函数去拿；
@@ -322,7 +314,7 @@ class BucketedBatchSampler(ReproducibleBatchSampler):
             if len(batches[-1])==0:
                 batches.pop(-1)
 
-        assert len(list(chain(*batches))) == self.num_left_samples
+        assert sum(map(len, batches)) == self.num_left_samples
 
         if self.drop_last and len(batches) >= 1 and len(batches[-1]) < self.batch_size:
             batches = batches[:-1]
@@ -419,4 +411,12 @@ class BucketedBatchSampler(ReproducibleBatchSampler):
         self.old_num_replicas = states['num_replicas']
 
     def set_epoch(self, epoch):
-        self.epoch = epoch
\ No newline at end of file
+        self.epoch = epoch
+
+    @property
+    def batch_idx_in_epoch(self):
+        if self.drop_last:
+            return len(self.dataset) // self.batch_size - (len(self.dataset) - self.num_consumed_samples) // self.batch_size
+        else:
+            return (len(self.dataset) + self.batch_size - 1) // self.batch_size - \
+                   (len(self.dataset) - self.num_consumed_samples + self.batch_size - 1) // self.batch_size
\ No newline at end of file
diff --git a/fastNLP/core/samplers/reproducible_sampler.py b/fastNLP/core/samplers/reproducible_sampler.py
index c3facbb9..c8425dc7 100644
--- a/fastNLP/core/samplers/reproducible_sampler.py
+++ b/fastNLP/core/samplers/reproducible_sampler.py
@@ -20,6 +20,8 @@ class ReproducibleSampler:
      或者 batch_sampler；注意，所有在 init 中初始化的变量，都不能含有 _ 下横线作为开头；所有不在 init 中设置的变量都必须以下横线开头。
 
     """
+    def __init__(self, **kwargs):
+        self.num_replicas = 1
 
     def set_distributed(self, num_replicas, rank, pad=True):
         raise NotImplementedError("Each specific sampler should implement its own `set_distributed` method.")
@@ -47,14 +49,6 @@ class ReproducibleSampler:
     def set_epoch(self, epoch):
         pass
 
-    @property
-    def num_repliacs(self):
-        return self._num_replicas
-
-    @num_repliacs.setter
-    def num_repliacs(self, value):
-        self._num_replicas = value
-
 
 class RandomSampler(ReproducibleSampler):
     def __init__(self, dataset, shuffle: bool = True, seed: int = 0, **kwargs):
diff --git a/tests/core/drivers/paddle_driver/test_fleet.py b/tests/core/drivers/paddle_driver/test_fleet.py
index c775a3a2..76d1f793 100644
--- a/tests/core/drivers/paddle_driver/test_fleet.py
+++ b/tests/core/drivers/paddle_driver/test_fleet.py
@@ -1,6 +1,6 @@
-from dataclasses import replace
 import pytest
 import os
+from pathlib import Path
 
 os.environ["FASTNLP_BACKEND"] = "paddle"
 from fastNLP.core.drivers.paddle_driver.fleet import PaddleFleetDriver
@@ -12,19 +12,22 @@ from fastNLP.core.samplers import (
     UnrepeatedSequentialSampler,
 )
 from tests.helpers.models.paddle_model import PaddleNormalModel_Classification_1
-from tests.helpers.datasets.paddle_data import PaddleNormalDataset
+from tests.helpers.datasets.paddle_data import PaddleNormalDataset, PaddleRandomMaxDataset
 from tests.helpers.utils import magic_argv_env_context
+from fastNLP.core import synchronize_safe_rm
 
 import paddle
 import paddle.distributed as dist
 from paddle.io import DataLoader, BatchSampler
 
-def generate_driver(num_labels, feature_dimension):
+def generate_driver(num_labels, feature_dimension, device=[0,1], fp16=False, output_from_new_proc="only_error"):
     paddle_model = PaddleNormalModel_Classification_1(num_labels, feature_dimension)
     paddle_opt = paddle.optimizer.Adam(parameters=paddle_model.parameters(), learning_rate=0.01)
     driver = PaddleFleetDriver(
         model=paddle_model,
-        parallel_device=[0,1],
+        parallel_device=device,
+        fp16=fp16,
+        output_from_new_proc=output_from_new_proc
     )
     driver.set_optimizers(paddle_opt)
     driver.setup()
@@ -33,7 +36,7 @@ def generate_driver(num_labels, feature_dimension):
 
 ############################################################################
 #
-# 测试PaddleFleetDriver的一些函数
+# 测试 PaddleFleetDriver 的一些函数
 #
 ############################################################################
 
@@ -46,6 +49,19 @@ class TestFleetDriverFunction:
     def setup_class(cls):
         cls.driver = generate_driver(10, 10)
 
+    @magic_argv_env_context
+    def test_multi_drivers(self):
+        """
+        测试使用了多个 PaddleFleetDriver 的情况。
+        """
+        driver2 = generate_driver(20, 10)
+
+        with pytest.raises(RuntimeError):
+            # 设备设置不同，应该报错
+            driver3 = generate_driver(20, 3, device=[0,2])
+
+        dist.barrier()
+
     @magic_argv_env_context
     def test_move_data_to_device(self):
         """
@@ -106,10 +122,11 @@ class TestSetDistReproDataloader:
 
     @classmethod
     def setup_class(cls):
-        cls.driver = generate_driver(10, 10)
+        cls.device = [0, 1]
+        cls.driver = generate_driver(10, 10, device=cls.device)
 
     def setup_method(self):
-        self.dataset = PaddleNormalDataset(20)
+        self.dataset = PaddleNormalDataset(40)
 
     """
     传入的 `dist` 参数为具体的 ReproducibleSampler 或 ReproducibleBatchSampler 的情况
@@ -118,9 +135,10 @@ class TestSetDistReproDataloader:
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_batch_sampler(self, shuffle):
+    def test_with_dist_batch_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 BucketedBatchSampler 时的表现
+        此时应该将 batch_sampler 替换为 dist 对应的 BucketedBatchSampler
         """
         dataloader = DataLoader(self.dataset, batch_size=4, shuffle=not shuffle)
         batch_sampler = BucketedBatchSampler(self.dataset, self.dataset._data, batch_size=4, shuffle=shuffle)
@@ -130,14 +148,16 @@ class TestSetDistReproDataloader:
         assert isinstance(replaced_loader.batch_sampler, BucketedBatchSampler)
         assert replaced_loader.batch_sampler is batch_sampler
         self.check_distributed_sampler(replaced_loader.batch_sampler)
+        self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
         
         dist.barrier()
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_sampler(self, shuffle):
+    def test_with_dist_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 RandomSampler 时的表现
+        此时应该将 batch_sampler.sampler 替换为 dist 对应的 RandomSampler
         """
         dataloader = DataLoader(self.dataset, batch_size=4, shuffle=not shuffle)
         sampler = RandomSampler(self.dataset, shuffle=shuffle)
@@ -150,6 +170,7 @@ class TestSetDistReproDataloader:
         assert replaced_loader.batch_sampler.sampler is sampler
         assert replaced_loader.batch_sampler.batch_size == dataloader.batch_sampler.batch_size
         self.check_distributed_sampler(replaced_loader.batch_sampler.sampler)
+        self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
 
         dist.barrier()
     
@@ -161,9 +182,10 @@ class TestSetDistReproDataloader:
     """
 
     @magic_argv_env_context
-    def test_set_dist_repro_dataloader_with_dist_none_reproducible_true(self):
+    def test_with_dist_none_reproducible_true(self):
         """
         测试 set_dist_repro_dataloader 中 dist 为 None、reproducible 为 True 时的表现
+        当用户在 driver 之外初始化了分布式环境时，fastnlp 不支持进行断点重训，此时应该报错
         """
         dataloader = DataLoader(self.dataset, batch_size=4, shuffle=True)
         with pytest.raises(RuntimeError):
@@ -173,11 +195,14 @@ class TestSetDistReproDataloader:
         dist.barrier()
 
     @magic_argv_env_context
+    # @pytest.mark.parametrize("shuffle", ([True, False]))
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_none_reproducible_false_dataloader_reproducible_batch_sampler(self, shuffle):
+    def test_with_dist_none_reproducible_false_dataloader_reproducible_batch_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 None、reproducible 为 False 、dataloader 有 BucketedBatchSampler 
         时的表现
+        此时传入的 dataloader 的 batch_sampler 应该已经执行了 set_distributed，产生一个新的 dataloader，其 batch_sampler
+        和原 dataloader 相同
         """
         dataloader = DataLoader(
             self.dataset,
@@ -194,16 +219,19 @@ class TestSetDistReproDataloader:
         assert isinstance(replaced_loader.batch_sampler, BucketedBatchSampler)
         assert replaced_loader.batch_sampler.batch_size == 4
         self.check_distributed_sampler(dataloader.batch_sampler)
+        self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
 
         dist.barrier()
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_none_reproducible_false_dataloader_reproducible_smpler(self, shuffle):
+    def test_with_dist_none_reproducible_false_dataloader_reproducible_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 None、reproducible 为 False 、dataloader 有 RandomSampler 时的表现
+        此时传入的 dataloader 的 batch_sampler.sampler 应该已经执行了 set_distributed，产生一个新的 dataloader，其
+        batch_sampler.sampler 和原 dataloader 相同
         """
-        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=2)
+        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=4)
         batch_sampler.sampler = RandomSampler(self.dataset, shuffle)
         batch_sampler.sampler.set_distributed(
             num_replicas=self.driver.world_size,
@@ -220,16 +248,19 @@ class TestSetDistReproDataloader:
         assert not (replaced_loader.batch_sampler is dataloader.batch_sampler)
         assert isinstance(replaced_loader.batch_sampler.sampler, RandomSampler)
         assert not (replaced_loader.batch_sampler.sampler is dataloader.batch_sampler.sampler)
-        assert replaced_loader.batch_sampler.batch_size == 2
+        assert replaced_loader.batch_sampler.batch_size == 4
         assert replaced_loader.batch_sampler.drop_last == False
         self.check_distributed_sampler(replaced_loader.batch_sampler.sampler)
+        self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
+    
         dist.barrier()
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_none_reproducible_false_dataloader_normal(self, shuffle):
+    def test_with_dist_none_reproducible_false_dataloader_normal(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 None、reproducible 为 False 、dataloader 为一般情况时的表现
+        此时直接返回原来的 dataloader，不做任何处理。
         """
         dataloader = DataLoader(self.dataset, batch_size=4, shuffle=shuffle)
         replaced_loader = self.driver.set_dist_repro_dataloader(dataloader, None, False)
@@ -244,10 +275,11 @@ class TestSetDistReproDataloader:
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_dist_dataloader_reproducible_batch_sampler(self, shuffle):
+    def test_with_dist_dist_dataloader_reproducible_batch_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 'dist'、dataloader.batch_sampler 为 ReproducibleBatchSampler
         的表现
+        此时应该返回一个新的 dataloader，其batch_sampler 和原 dataloader 相同，且应该正确地设置了分布式相关的属性
         """
         dataloader = DataLoader(
             dataset=self.dataset,
@@ -265,12 +297,14 @@ class TestSetDistReproDataloader:
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_dist_dataloader_reproducible_sampler(self, shuffle):
+    def test_with_dist_dist_dataloader_reproducible_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 'dist'、dataloader.batch_sampler.sampler 为 ReproducibleSampler
         的表现
+        此时应该返回一个新的 dataloader，其 batch_sampler.sampler 和原 dataloader 相同，且应该正确地设置了分布式相关
+        的属性
         """
-        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=2, shuffle=shuffle)
+        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=4, shuffle=shuffle)
         batch_sampler.sampler = RandomSampler(self.dataset, shuffle)
         dataloader = DataLoader(
             self.dataset,
@@ -282,16 +316,18 @@ class TestSetDistReproDataloader:
         assert not (replaced_loader.batch_sampler is dataloader.batch_sampler)
         assert isinstance(replaced_loader.batch_sampler.sampler, RandomSampler)
         assert not (replaced_loader.batch_sampler.sampler is dataloader.batch_sampler.sampler)
-        assert replaced_loader.batch_sampler.batch_size == 2
+        assert replaced_loader.batch_sampler.batch_size == 4
         assert replaced_loader.batch_sampler.sampler.shuffle == shuffle
         self.check_distributed_sampler(replaced_loader.batch_sampler.sampler)
         dist.barrier()
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_dist_dataloader_normal(self, shuffle):
+    def test_with_dist_dist_dataloader_normal(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 'dist'、dataloader 为一般情况的表现
+        此时应该返回一个新的 dataloader，并替换其 batch_sampler.sampler 为 RandomSampler，且应该正确设置了分布式相关
+        的属性
         """
         dataloader = DataLoader(self.dataset, batch_size=4, shuffle=shuffle)
         replaced_loader = self.driver.set_dist_repro_dataloader(dataloader, "dist", False)
@@ -302,6 +338,7 @@ class TestSetDistReproDataloader:
         assert isinstance(replaced_loader.batch_sampler.sampler, RandomSampler)
         assert replaced_loader.batch_sampler.batch_size == dataloader.batch_sampler.batch_size
         assert replaced_loader.batch_sampler.sampler.shuffle == shuffle
+        self.check_distributed_sampler(replaced_loader.batch_sampler.sampler)
         dist.barrier()
 
     """
@@ -311,12 +348,14 @@ class TestSetDistReproDataloader:
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_unrepeat_dataloader_reproducible_sampler(self, shuffle):
+    def test_with_dist_unrepeat_dataloader_reproducible_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 'unrepeatdist'、dataloader.batch_sampler.sampler 为 ReproducibleSampler
         的表现
+        此时应该返回一个新的 dataloader，且将原来的 Sampler 替换为 UnrepeatedRandomSampler，且正确地设置了分布式相关
+        的属性
         """
-        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=2)
+        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=4)
         batch_sampler.sampler = RandomSampler(self.dataset, shuffle)
         dataloader = DataLoader(
             self.dataset,
@@ -328,19 +367,20 @@ class TestSetDistReproDataloader:
         assert isinstance(replaced_loader.batch_sampler, BatchSampler)
         assert not (replaced_loader.batch_sampler is dataloader.batch_sampler)
         assert isinstance(replaced_loader.batch_sampler.sampler, UnrepeatedRandomSampler)
-        assert replaced_loader.batch_sampler.batch_size == 2
+        assert replaced_loader.batch_sampler.batch_size == 4
         assert replaced_loader.batch_sampler.sampler.shuffle == shuffle
         self.check_distributed_sampler(replaced_loader.batch_sampler.sampler)
         dist.barrier()
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_unrepeat_dataloader_unrepreated_sampler(self, shuffle):
+    def test_with_dist_unrepeat_dataloader_unrepreated_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 'unrepeatdist'、dataloader.batch_sampler.sampler 为 UnrepeatedSampler
         的表现
+        此时应该返回一个新的 dataloader，且重新实例化了原来的 Sampler
         """
-        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=2)
+        batch_sampler = BatchSampler(dataset=self.dataset, batch_size=4)
         batch_sampler.sampler = UnrepeatedRandomSampler(self.dataset, shuffle)
         dataloader = DataLoader(
             self.dataset,
@@ -353,16 +393,18 @@ class TestSetDistReproDataloader:
         assert not (replaced_loader.batch_sampler is dataloader.batch_sampler)
         assert isinstance(replaced_loader.batch_sampler.sampler, UnrepeatedRandomSampler)
         assert not (replaced_loader.batch_sampler.sampler is dataloader.batch_sampler.sampler)
-        assert replaced_loader.batch_sampler.batch_size == 2
+        assert replaced_loader.batch_sampler.batch_size == 4
         assert replaced_loader.drop_last == dataloader.drop_last
         self.check_distributed_sampler(replaced_loader.batch_sampler.sampler)
         dist.barrier()
 
     @magic_argv_env_context
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_unrepeat_dataloader_normal(self, shuffle):
+    def test_with_dist_unrepeat_dataloader_normal(self, shuffle):
         """
         测试 set_dist_repro_dataloader 中 dist 为 'unrepeatdist'、dataloader 为一般情况的表现
+        此时应该返回一个新的 dataloader，且将 sampler 替换为 UnrepeatedSequentialSampler，并正确地设置了分布式相关
+        的属性
         """
         dataloader = DataLoader(self.dataset, batch_size=4, shuffle=shuffle)
         replaced_loader = self.driver.set_dist_repro_dataloader(dataloader, "unrepeatdist", False)
@@ -385,3 +427,346 @@ class TestSetDistReproDataloader:
         if not isinstance(sampler, UnrepeatedSampler):
             assert sampler.pad == True
 
+    def check_set_dist_repro_dataloader(self, dataloader, replaced_loader, shuffle):
+        """
+        测试多卡下 set_dist_repro_dataloader 函数的执行结果是否正确
+        """
+        # 迭代两个 batch
+        num_replicas = len(self.device)
+        num_consumed_batches = 2
+        already_seen_idx = set()
+        for idx, batch in enumerate(replaced_loader):
+            if idx >= num_consumed_batches:
+                break
+            already_seen_idx.update(batch)
+        dist.barrier()
+        if isinstance(replaced_loader.batch_sampler, BucketedBatchSampler):
+            sampler_states = replaced_loader.batch_sampler.state_dict()
+        else:
+            sampler_states = replaced_loader.batch_sampler.sampler.state_dict()
+
+        # 重新加载，应该可以输出剩下的内容，且对于 PaddleNormalDataset 来说，排序后应该是一个 range
+        left_idxes = set()
+        if isinstance(replaced_loader.batch_sampler, BucketedBatchSampler):
+            batch_size = replaced_loader.batch_sampler.batch_size
+            sampler_states["num_consumed_samples"] = num_consumed_batches * batch_size * num_replicas
+            # 重新改造 dataloader
+            new_loader = DataLoader(
+                dataset=replaced_loader.dataset,
+                batch_sampler=BucketedBatchSampler(
+                    replaced_loader.dataset,
+                    length=replaced_loader.dataset._data,
+                    batch_size=batch_size,
+                    shuffle=shuffle,
+                )
+            )
+            new_loader.batch_sampler.set_distributed(
+                num_replicas=self.driver.world_size,
+                rank=self.driver.global_rank,
+                pad=True
+            )
+            new_loader.batch_sampler.load_state_dict(sampler_states)
+        else:
+            batch_size = replaced_loader.batch_sampler.batch_size
+            sampler_states["num_consumed_samples"] = num_consumed_batches * batch_size * num_replicas
+            # 重新构造 dataloader
+            batch_sampler = BatchSampler(replaced_loader.dataset, shuffle=shuffle, batch_size=batch_size)
+            batch_sampler.sampler = RandomSampler(replaced_loader.dataset, shuffle=shuffle)
+            batch_sampler.sampler.set_distributed(
+                num_replicas=self.driver.world_size,
+                rank=self.driver.global_rank
+            )
+            new_loader = DataLoader(replaced_loader.dataset, batch_sampler=batch_sampler)
+            new_loader.batch_sampler.sampler.load_state_dict(sampler_states)
+        for idx, batch in enumerate(new_loader):
+            left_idxes.update(batch)
+
+        assert len(left_idxes) + len(already_seen_idx) == len(self.dataset) / num_replicas
+        assert len(left_idxes | already_seen_idx) == len(self.dataset) / num_replicas
+
+
+############################################################################
+#
+# 测试 save 和 load 相关的功能
+#
+############################################################################
+class TestSaveLoad:
+    """
+    测试多卡情况下 save 和 load 相关函数的表现
+    """
+
+    @classmethod
+    def setup_class(cls):
+        # 不在这里 setup 的话会报错
+        cls.driver = generate_driver(10, 10)
+
+    def setup_method(self):
+        self.dataset = PaddleRandomMaxDataset(20, 10)
+
+    @magic_argv_env_context
+    @pytest.mark.parametrize("only_state_dict", ([True, False]))
+    def test_save_and_load_model(self, only_state_dict):
+        """
+        测试 save_model 和 load_model 函数
+        """
+        try:
+            path = "model"
+
+            dataloader = DataLoader(self.dataset, batch_size=2)
+            self.driver1, self.driver2 = generate_driver(10, 10), generate_driver(10, 10)
+
+            if only_state_dict:
+                self.driver1.save_model(path, only_state_dict)
+            else:
+                self.driver1.save_model(path, only_state_dict, input_spec=[paddle.ones((4, 10))])
+
+            # 同步
+            dist.barrier()
+            self.driver2.load_model(path, only_state_dict)
+
+            for idx, batch in enumerate(dataloader):
+                batch = self.driver1.move_data_to_device(batch)
+                res1 = self.driver1.model(
+                    batch,
+                    fastnlp_fn=self.driver1.model._layers.model.evaluate_step,
+                    # Driver.model -> DataParallel._layers -> _FleetWrappingModel.model
+                    fastnlp_signature_fn=None,
+                    wo_auto_param_call=False,
+                )
+                res2 = self.driver2.model(
+                    batch,
+                    fastnlp_fn=self.driver2.model._layers.model.evaluate_step,
+                    fastnlp_signature_fn=None,
+                    wo_auto_param_call=False,
+                )
+
+                assert paddle.equal_all(res1["pred"], res2["pred"])
+        finally:
+            if only_state_dict:
+                synchronize_safe_rm(path)
+            else:
+                synchronize_safe_rm(path + ".pdiparams")
+                synchronize_safe_rm(path + ".pdiparams.info")
+                synchronize_safe_rm(path + ".pdmodel")
+
+    @magic_argv_env_context
+    @pytest.mark.parametrize("only_state_dict", ([True, False]))
+    @pytest.mark.parametrize("fp16", ([True, False]))
+    @pytest.mark.parametrize("device", ([[0,1]]))
+    def test_save_and_load_with_bucketedbatchsampler(self, device, only_state_dict, fp16):
+        """
+        测试save和load函数，主要测试 dataloader 被替换了 sampler 之后的情况
+        """
+
+        try:
+            path = "model.ckp"
+            num_replicas = len(device)
+
+            self.driver1, self.driver2 = generate_driver(10, 10, device=device, fp16=fp16), \
+                                            generate_driver(10, 10, device=device, fp16=False)
+            dataloader = DataLoader(
+                dataset=self.dataset,
+                batch_sampler=BucketedBatchSampler(
+                    self.dataset,
+                    length=[10 for i in range(len(self.dataset))],
+                    batch_size=4,
+                )
+            )
+            dataloader.batch_sampler.set_distributed(
+                num_replicas=self.driver1.world_size,
+                rank=self.driver1.global_rank,
+                pad=True
+            )
+            num_consumed_batches = 2
+
+            already_seen_x_set = set()
+            already_seen_y_set = set()
+            for idx, batch in enumerate(dataloader):
+                if idx >= num_consumed_batches:
+                    break
+                already_seen_x_set.update(batch["x"])
+                already_seen_y_set.update(batch["y"])
+
+            # 同步
+            dist.barrier()
+
+            # 保存状态
+            sampler_states = dataloader.batch_sampler.state_dict()
+            save_states = {"num_consumed_batches": num_consumed_batches}
+            if only_state_dict:
+                self.driver1.save(Path(path), save_states, dataloader, only_state_dict, should_save_model=True)
+            else:
+                self.driver1.save(Path(path), save_states, dataloader, only_state_dict, should_save_model=True, input_spec=[paddle.ones((16, 10))])
+            # 加载
+            # 更改 batch_size
+            dataloader = DataLoader(
+                dataset=self.dataset,
+                batch_sampler=BucketedBatchSampler(
+                    self.dataset,
+                    length=[10 for i in range(len(self.dataset))],
+                    batch_size=4,
+                )
+            )
+            dataloader.batch_sampler.set_distributed(
+                num_replicas=self.driver2.world_size,
+                rank=self.driver2.global_rank,
+                pad=True
+            )
+            load_states = self.driver2.load(Path(path), dataloader, only_state_dict, should_load_model=True)
+            replaced_loader = load_states.pop("dataloader")
+            # 1. 检查 optimizer 的状态
+            # TODO optimizer 的 state_dict 总是为空
+
+            # 2. 检查 batch_sampler 是否被正确地加载和替换
+            assert not (replaced_loader is dataloader)
+            assert replaced_loader.batch_sampler is dataloader.batch_sampler
+            assert isinstance(replaced_loader.batch_sampler, BucketedBatchSampler)
+            assert replaced_loader.batch_sampler.seed == sampler_states["seed"]
+            assert replaced_loader.batch_sampler.num_consumed_samples == num_consumed_batches * 4 * num_replicas
+
+            # 3. 检查 fp16 是否被加载
+            if fp16:
+                assert isinstance(self.driver2.grad_scaler, paddle.amp.GradScaler)
+
+            # 4. 检查 model 的参数是否正确
+            # 5. 检查 batch_idx
+            start_batch = load_states.pop('batch_idx_in_epoch')
+            assert start_batch == 2 * num_consumed_batches
+            left_x_batches = set()
+            left_y_batches = set()
+            for idx, batch in enumerate(replaced_loader):
+
+                left_x_batches.update(batch["x"])
+                left_y_batches.update(batch["y"])
+                res1 = self.driver1.model(
+                    batch,
+                    fastnlp_fn=self.driver1.model._layers.model.evaluate_step,
+                    # Driver.model -> DataParallel._layers -> _FleetWrappingModel.model
+                    fastnlp_signature_fn=None,
+                    wo_auto_param_call=False,
+                )
+                res2 = self.driver2.model(
+                    batch,
+                    fastnlp_fn=self.driver2.model._layers.model.evaluate_step,
+                    fastnlp_signature_fn=None,
+                    wo_auto_param_call=False,
+                )
+                assert paddle.equal_all(res1["pred"], res2["pred"])
+
+            assert len(left_x_batches) + len(already_seen_x_set) == len(self.dataset) / num_replicas
+            assert len(left_x_batches | already_seen_x_set) == len(self.dataset) / num_replicas
+            assert len(left_y_batches) + len(already_seen_y_set) == len(self.dataset) / num_replicas
+            assert len(left_y_batches | already_seen_y_set) == len(self.dataset) / num_replicas
+        finally:
+            synchronize_safe_rm(path)
+
+    @magic_argv_env_context
+    @pytest.mark.parametrize("only_state_dict", ([True, False]))
+    @pytest.mark.parametrize("fp16", ([True, False]))
+    @pytest.mark.parametrize("device", ([[0,1]]))
+    def test_save_and_load_with_randomsampler(self, device, only_state_dict, fp16):
+        """
+        测试save和load函数，主要测试 dataloader 被替换了 batch_sampler 的情况
+        """
+
+        try:
+            path = "model.ckp"
+
+            num_replicas = len(device)
+
+            self.driver1 = generate_driver(10, 10, device=device, fp16=fp16)
+            self.driver2 = generate_driver(10, 10, device=device, fp16=False)
+            batch_sampler = BatchSampler(dataset=self.dataset, batch_size=4)
+            batch_sampler.sampler = RandomSampler(self.dataset, True)
+            batch_sampler.sampler.set_distributed(
+                num_replicas=self.driver1.world_size,
+                rank=self.driver1.global_rank,
+                pad=True
+            )
+            dataloader = DataLoader(
+                self.dataset,
+                batch_sampler=batch_sampler
+            )
+            num_consumed_batches = 2
+
+            already_seen_x_set = set()
+            already_seen_y_set = set()
+            for idx, batch in enumerate(dataloader):
+                if idx >= num_consumed_batches:
+                    break
+                already_seen_x_set.update(batch["x"])
+                already_seen_y_set.update(batch["y"])
+
+            # 同步
+            dist.barrier()
+
+            # 保存状态
+            sampler_states = dataloader.batch_sampler.sampler.state_dict()
+            save_states = {"num_consumed_batches": num_consumed_batches}
+            if only_state_dict:
+                self.driver1.save(Path(path), save_states, dataloader, only_state_dict, should_save_model=True)
+            else:
+                self.driver1.save(Path(path), save_states, dataloader, only_state_dict, should_save_model=True, input_spec=[paddle.ones((16, 10))])
+            # 加载
+            # 更改 batch_size
+            batch_sampler = BatchSampler(dataset=self.dataset, batch_size=2)
+            batch_sampler.sampler = RandomSampler(self.dataset, True)
+            batch_sampler.sampler.set_distributed(
+                num_replicas=self.driver2.world_size,
+                rank=self.driver2.global_rank,
+                pad=True
+            )
+            dataloader = DataLoader(
+                self.dataset,
+                batch_sampler=batch_sampler
+            )
+            load_states = self.driver2.load(Path(path), dataloader, only_state_dict, should_load_model=True)
+            replaced_loader = load_states.pop("dataloader")
+
+            # 1. 检查 optimizer 的状态
+            # TODO optimizer 的 state_dict 总是为空
+
+            # 2. 检查 sampler 是否被正确地加载和替换
+            assert not (replaced_loader is dataloader)
+            assert isinstance(replaced_loader.batch_sampler.sampler, RandomSampler)
+            assert replaced_loader.batch_sampler.sampler.seed == sampler_states["seed"]
+            assert replaced_loader.batch_sampler.sampler.epoch == sampler_states["epoch"]
+            assert replaced_loader.batch_sampler.sampler.num_consumed_samples == 4 * num_consumed_batches * num_replicas
+            assert len(replaced_loader.batch_sampler.sampler.dataset) == sampler_states["length"]
+            assert replaced_loader.batch_sampler.sampler.shuffle == sampler_states["shuffle"]
+            # 3. 检查 fp16 是否被加载
+            if fp16:
+                assert isinstance(self.driver2.grad_scaler, paddle.amp.GradScaler)
+
+            # 4. 检查 model 的参数是否正确
+            # 5. 检查 batch_idx
+            start_batch = load_states.pop('batch_idx_in_epoch')
+            assert start_batch == 2 * num_consumed_batches
+            left_x_batches = set()
+            left_y_batches = set()
+            for idx, batch in enumerate(replaced_loader):
+
+                left_x_batches.update(batch["x"])
+                left_y_batches.update(batch["y"])
+                res1 = self.driver1.model(
+                    batch,
+                    fastnlp_fn=self.driver1.model._layers.model.evaluate_step,
+                    # Driver.model -> DataParallel._layers -> _FleetWrappingModel.model
+                    fastnlp_signature_fn=None,
+                    wo_auto_param_call=False,
+                )
+                res2 = self.driver2.model(
+                    batch,
+                    fastnlp_fn=self.driver2.model._layers.model.evaluate_step,
+                    fastnlp_signature_fn=None,
+                    wo_auto_param_call=False,
+                )
+                assert paddle.equal_all(res1["pred"], res2["pred"])
+
+            assert len(left_x_batches) + len(already_seen_x_set) == len(self.dataset) / num_replicas
+            assert len(left_x_batches | already_seen_x_set) == len(self.dataset) / num_replicas
+            assert len(left_y_batches) + len(already_seen_y_set) == len(self.dataset) / num_replicas
+            assert len(left_y_batches | already_seen_y_set) == len(self.dataset) / num_replicas
+
+        finally:
+            synchronize_safe_rm(path)
\ No newline at end of file
diff --git a/tests/core/drivers/paddle_driver/test_single_device.py b/tests/core/drivers/paddle_driver/test_single_device.py
index 0c8e4256..c80bd609 100644
--- a/tests/core/drivers/paddle_driver/test_single_device.py
+++ b/tests/core/drivers/paddle_driver/test_single_device.py
@@ -1,4 +1,3 @@
-from dataclasses import replace
 import os
 from re import S
 os.environ["FASTNLP_BACKEND"] = "paddle"
@@ -349,7 +348,7 @@ class TestSingleDeviceFunction:
 #
 ############################################################################
 
-class TestSetDistReproDataloder:
+class TestSetDistReproDataloader:
     """
     专门测试 set_dist_repro_dataloader 函数的类
     """
@@ -358,7 +357,7 @@ class TestSetDistReproDataloder:
         model = PaddleNormalModel_Classification_1(10, 32)
         self.driver = PaddleSingleDriver(model, device="cpu")
     
-    def test_set_dist_repro_dataloader_with_reproducible_false(self):
+    def test_with_reproducible_false(self):
         """
         测试 set_dist_repro_dataloader 参数 `reproducible` 为 False 时的表现
         当dist为字符串时，此时应该返回原来的 dataloader
@@ -369,7 +368,7 @@ class TestSetDistReproDataloder:
         assert replaced_loader is dataloader
 
     @pytest.mark.parametrize("shuffle", [True, False])
-    def test_set_dist_repro_dataloader_with_reproducible_true(self, shuffle):
+    def test_with_reproducible_true(self, shuffle):
         """
         测试 set_dist_repro_dataloader 参数 `reproducible` 为 True 时的表现
         当dist为字符串时，此时应该返回新的 dataloader，且如果原 sampler 为 paddle.io.RandomSampler（shuffle=True），
@@ -394,7 +393,7 @@ class TestSetDistReproDataloder:
         self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
 
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_batch_sampler(self, shuffle):
+    def test_with_dist_batch_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 参数 dist 不是字符串时的表现，且 dist 是 ReproducibleBatchSampler
         应该返回新的 dataloader，并将 batch_sampler 替换为 dist 对应的 Sampler
@@ -410,7 +409,7 @@ class TestSetDistReproDataloder:
         self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
 
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dist_sampler(self, shuffle):
+    def test_with_dist_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 参数 dist 不是字符串时的表现
         应该返回新的 dataloader，并将 batch_sampler.sampler 替换为 dist 对应的 Sampler
@@ -429,7 +428,7 @@ class TestSetDistReproDataloder:
         self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
 
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dataloader_reproducible_batch_sampler(self, shuffle):
+    def test_with_dataloader_reproducible_batch_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 参数 dataloader 已经支持断点重训时的表现
         应该返回新的 dataloader，且其余各项设置和原来相同
@@ -453,7 +452,7 @@ class TestSetDistReproDataloder:
         self.check_set_dist_repro_dataloader(dataloader, replaced_loader, shuffle)
 
     @pytest.mark.parametrize("shuffle", ([True, False]))
-    def test_set_dist_repro_dataloader_with_dataloader_reproducible_sampler(self, shuffle):
+    def test_with_dataloader_reproducible_sampler(self, shuffle):
         """
         测试 set_dist_repro_dataloader 参数 dataloader 已经支持断点重训时的表现
         应该返回新的 dataloader，且其余各项设置和原来相同
@@ -498,10 +497,7 @@ class TestSetDistReproDataloder:
         left_idxes = set()
         if isinstance(replaced_loader.batch_sampler, RandomBatchSampler):
             batch_size = replaced_loader.batch_sampler.batch_size
-            if num_consumed_samples_array is not None:
-                sampler_states["num_consumed_samples"] = num_consumed_samples_array[num_consumed_batches]
-            else:
-                sampler_states["num_consumed_samples"] = num_consumed_batches * batch_size
+            sampler_states["num_consumed_samples"] = num_consumed_batches * batch_size
             # 重新改造 dataloader
             new_loader = DataLoader(
                 dataset=replaced_loader.dataset,
@@ -514,11 +510,8 @@ class TestSetDistReproDataloder:
             new_loader.batch_sampler.load_state_dict(sampler_states)
         else:
             batch_size = replaced_loader.batch_sampler.batch_size
-            num_consumed_batches = num_consumed_batches * batch_size
-            if num_consumed_samples_array is not None:
-                sampler_states["num_consumed_samples"] = num_consumed_samples_array[num_consumed_batches]
-            else:
-                sampler_states["num_consumed_samples"] = num_consumed_batches * batch_size
+            num_consumed_samples = num_consumed_batches * batch_size
+            sampler_states["num_consumed_samples"] = num_consumed_batches * batch_size
             # 重新构造 dataloader
             batch_sampler = BatchSampler(replaced_loader.dataset, shuffle=shuffle, batch_size=batch_size)
             batch_sampler.sampler = RandomSampler(replaced_loader.dataset, shuffle=shuffle)
@@ -536,13 +529,13 @@ class TestSetDistReproDataloder:
 #
 ############################################################################
 
-def generate_random_driver(features, labels):
+def generate_random_driver(features, labels, fp16=False, device="cpu"):
     """
     生成driver
     """
     model = PaddleNormalModel_Classification_1(labels, features)
     opt = paddle.optimizer.Adam(parameters=model.parameters(), learning_rate=0.01)
-    driver = PaddleSingleDriver(model, device="cpu")
+    driver = PaddleSingleDriver(model, device=device, fp16=fp16)
     driver.set_optimizers(opt)
     driver.setup()
 
@@ -550,8 +543,8 @@ def generate_random_driver(features, labels):
 
 @pytest.fixture
 def prepare_test_save_load():
-    dataset = PaddleRandomMaxDataset(320, 10)
-    dataloader = DataLoader(dataset, batch_size=32)
+    dataset = PaddleRandomMaxDataset(40, 10)
+    dataloader = DataLoader(dataset, batch_size=4)
     driver1, driver2 = generate_random_driver(10, 10), generate_random_driver(10, 10)
     return driver1, driver2, dataloader
 
@@ -584,21 +577,23 @@ def test_save_and_load_model(prepare_test_save_load, only_state_dict):
             rank_zero_rm(path + ".pdiparams.info")
             rank_zero_rm(path + ".pdmodel")
 
-@pytest.mark.parametrize("only_state_dict", ([True, False]))
-def test_save_and_load_with_randombatchsampler(only_state_dict):
+# @pytest.mark.parametrize("only_state_dict", ([True, False]))
+@pytest.mark.parametrize("only_state_dict", ([True]))
+@pytest.mark.parametrize("fp16", ([True, False]))
+def test_save_and_load_with_randombatchsampler(only_state_dict, fp16):
     """
     测试save和load函数，主要测试 dataloader 被替换了 sampler 之后的情况
     """
 
     try:
         path = "model.ckp"
-
-        driver1, driver2 = generate_random_driver(10, 10), generate_random_driver(10, 10)
         dataset = PaddleRandomMaxDataset(40, 10)
         dataloader = DataLoader(
             dataset=dataset,
             batch_sampler=RandomBatchSampler(BatchSampler(dataset, batch_size=4), 4, False)
         )
+        driver1, driver2 = generate_random_driver(10, 10, fp16, "gpu"), generate_random_driver(10, 10, False, "gpu")
+
         num_consumed_batches = 2
 
         already_seen_x_set = set()
@@ -633,8 +628,13 @@ def test_save_and_load_with_randombatchsampler(only_state_dict):
         assert replaced_loader.batch_sampler.index_list == sampler_states["index_list"]
         assert replaced_loader.batch_sampler.num_consumed_samples == num_consumed_batches * 4
 
-        # 3. 检查 model 的参数是否正确
-        # 4. 检查 batch_idx
+        # 3. 检查 fp16 是否被加载
+        if fp16:
+            assert isinstance(driver2.grad_scaler, paddle.amp.GradScaler)
+
+
+        # 4. 检查 model 的参数是否正确
+        # 5. 检查 batch_idx
         start_batch = load_states.pop('batch_idx_in_epoch')
         assert start_batch == 2 * num_consumed_batches
         left_x_batches = set()
@@ -654,8 +654,12 @@ def test_save_and_load_with_randombatchsampler(only_state_dict):
     finally:
         rank_zero_rm(path)
 
-@pytest.mark.parametrize("only_state_dict", ([True, False]))
-def test_save_and_load_with_randomsampler(only_state_dict):
+# @pytest.mark.parametrize("only_state_dict", ([True, False]))
+# TODO 在有迭代且使用了paddle.jit.save的时候会引发段错误，注释掉任意一段都不会出错
+# 但无法在单独的文件中复现
+@pytest.mark.parametrize("only_state_dict", ([True]))
+@pytest.mark.parametrize("fp16", ([True, False]))
+def test_save_and_load_with_randomsampler(only_state_dict, fp16):
     """
     测试save和load函数，主要测试 dataloader 被替换了 batch_sampler 的情况
     """
@@ -663,7 +667,7 @@ def test_save_and_load_with_randomsampler(only_state_dict):
     try:
         path = "model.ckp"
 
-        driver1, driver2 = generate_random_driver(10, 10), generate_random_driver(10, 10)
+        driver1, driver2 = generate_random_driver(10, 10, fp16, "gpu"), generate_random_driver(10, 10, False, "gpu")
         dataset = PaddleRandomMaxDataset(40, 10)
         batch_sampler = BatchSampler(dataset=dataset, batch_size=4)
         batch_sampler.sampler = RandomSampler(dataset, True)
@@ -711,8 +715,12 @@ def test_save_and_load_with_randomsampler(only_state_dict):
         assert len(replaced_loader.batch_sampler.sampler.dataset) == sampler_states["length"]
         assert replaced_loader.batch_sampler.sampler.shuffle == sampler_states["shuffle"]
 
-        # 3. 检查 model 的参数是否正确
-        # 4. 检查 batch_idx
+        # 3. 检查 fp16 是否被加载
+        if fp16:
+            assert isinstance(driver2.grad_scaler, paddle.amp.GradScaler)
+
+        # 4. 检查 model 的参数是否正确
+        # 5. 检查 batch_idx
         start_batch = load_states.pop('batch_idx_in_epoch')
         assert start_batch == 2 * num_consumed_batches
         left_x_batches = set()