!5482 modify save_checkpoint

Merge pull request !5482 from liuyang/md_save_checkpoint

mindspore/train/callback/_checkpoint.py

@@ -23,7 +23,7 @@ import mindspore.context as context
 from mindspore import log as logger
 from mindspore._checkparam import check_bool, check_int_non_negative
 from mindspore.train._utils import _make_directory
-from mindspore.train.serialization import _exec_save_checkpoint, _save_graph
+from mindspore.train.serialization import save_checkpoint, _save_graph
 from ._callback import Callback, set_cur_net
 
 
@@ -306,8 +306,8 @@ class ModelCheckpoint(Callback):
                 set_cur_net(cb_params.train_network)
                 cb_params.train_network.exec_checkpoint_graph()
 
-            _exec_save_checkpoint(cb_params.train_network, cur_file, self._config.integrated_save,
-                                  self._config.async_save)
+            save_checkpoint(cb_params.train_network, cur_file, self._config.integrated_save,
+                            self._config.async_save)
 
             self._latest_ckpt_file_name = cur_file
 

mindspore/train/serialization.py

@@ -141,24 +141,52 @@ def _exec_save(ckpt_file_name, data_list):
         raise RuntimeError(e.__str__())
 
 
-def save_checkpoint(parameter_list, ckpt_file_name, async_save=False):
+def save_checkpoint(save_obj, ckpt_file_name, integrated_save=True, async_save=False):
     """
     Saves checkpoint info to a specified file.
 
     Args:
-        parameter_list (list): Parameters list, each element is a dictionary
-                               like {"name":xx, "type":xx, "shape":xx, "data":xx}.
+        save_obj (nn.Cell or list): The train network for training or parameters list(each element is a dictionary,
+                                    like {"name":xx, "type":xx, "shape":xx, "data":xx}.)
         ckpt_file_name (str): Checkpoint file name.
+        integrated_save (bool): Whether to integrated save in automatic model parallel scene.
         async_save (bool): Whether asynchronous execution saves the checkpoint to a file. Default: False
 
     Raises:
+        TypeError: If the parameter save_obj is not nn.Cell or list type.
         RuntimeError: Failed to save the Checkpoint file.
     """
+
+    if not isinstance(save_obj, nn.Cell) and not isinstance(save_obj, list):
+        raise TypeError("The parameter save_obj should be nn.Cell or list, but got {}".format(type(save_obj)))
+
     logger.info("Execute save checkpoint process.")
 
+    if isinstance(save_obj, nn.Cell):
+        save_obj.init_parameters_data()
+        param_dict = {}
+        for _, param in save_obj.parameters_and_names():
+            param_dict[param.name] = param
+        param_list = []
+        for (key, value) in param_dict.items():
+            each_param = {"name": key}
+            if isinstance(value.data, Tensor):
+                param_data = value.data
+            else:
+                param_data = Tensor(value.data)
+
+            # in automatic model parallel scenario, some parameters were spliteds to all the devices,
+            # which should be combined before saving
+            if integrated_save and key in save_obj.parameter_layout_dict:
+                param_data = _get_merged_param_data(save_obj, key, param_data)
+
+            each_param["data"] = param_data
+            param_list.append(each_param)
+        save_obj = param_list
+
     data_list = {}
     with _ckpt_mutex:
-        for param in parameter_list:
+        for param in save_obj:
             key = param["name"]
             data_list[key] = []
             if isinstance(param["data"], Parameter):
@@ -180,6 +208,7 @@ def save_checkpoint(parameter_list, ckpt_file_name, async_save=False):
         thr.start()
     else:
         _exec_save(ckpt_file_name, data_list)
+
     logger.info("Save checkpoint process finish.")
 
 
@@ -354,39 +383,6 @@ def _save_graph(network, file_name):
         os.chmod(file_name, stat.S_IRUSR)
 
 
-def _exec_save_checkpoint(train_network, ckpt_file_name, integrated_save=True, async_save=False):
-    """
-    Saves checkpoint for 'ms' backend.
-
-    Args:
-        train_network (Network): The train network for training.
-        ckpt_file_name (str): The name of checkpoint file.
-        integrated_save (bool): Whether to integrated save in automatic model parallel scene.
-        async_save (bool): Whether asynchronous execute save checkpoint into file. Default: False.
-    """
-    train_network.init_parameters_data()
-    param_dict = {}
-    for _, param in train_network.parameters_and_names():
-        param_dict[param.name] = param
-    param_list = []
-    for (key, value) in param_dict.items():
-        each_param = {"name": key}
-        if isinstance(value.data, Tensor):
-            param_data = value.data
-        else:
-            param_data = Tensor(value.data)
-
-        # in automatic model parallel scenario, some parameters were spliteds to all the devices,
-        # which should be combined before saving
-        if integrated_save and key in train_network.parameter_layout_dict:
-            param_data = _get_merged_param_data(train_network, key, param_data)
-
-        each_param["data"] = param_data
-        param_list.append(each_param)
-
-    save_checkpoint(param_list, ckpt_file_name, async_save)
-
-
 def _get_merged_param_data(net, param_name, param_data):
     """
     Gets the merged data(tensor) from tensor slice, by device arrangement and tensor map.

model_zoo/official/gnn/gat/train.py

@@ -18,7 +18,7 @@ import os
 
 import numpy as np
 import mindspore.context as context
-from mindspore.train.serialization import _exec_save_checkpoint, load_checkpoint
+from mindspore.train.serialization import save_checkpoint, load_checkpoint
 
 from src.config import GatConfig
 from src.dataset import load_and_process
@@ -98,7 +98,7 @@ def train():
                 val_loss_model = eval_loss
                 if os.path.exists("ckpts/gat.ckpt"):
                     os.remove("ckpts/gat.ckpt")
-                _exec_save_checkpoint(train_net.network, "ckpts/gat.ckpt")
+                save_checkpoint(train_net.network, "ckpts/gat.ckpt")
             val_acc_max = np.max((val_acc_max, eval_acc))
             val_loss_min = np.min((val_loss_min, eval_loss))
             curr_step = 0

model_zoo/official/nlp/tinybert/src/utils.py

@@ -20,7 +20,7 @@ import numpy as np
 from mindspore import Tensor
 from mindspore.common import dtype as mstype
 from mindspore.train.callback import Callback
-from mindspore.train.serialization import _exec_save_checkpoint
+from mindspore.train.serialization import save_checkpoint
 from mindspore.ops import operations as P
 from mindspore.nn.learning_rate_schedule import LearningRateSchedule, PolynomialDecayLR, WarmUpLR
 from .assessment_method import Accuracy
@@ -53,9 +53,9 @@ class ModelSaveCkpt(Callback):
                                                                                    self.save_ckpt_step))
                 if os.path.exists(path):
                     os.remove(path)
-            _exec_save_checkpoint(self.network, os.path.join(self.output_dir,
-                                                             "tiny_bert_{}_{}.ckpt".format(int(saved_ckpt_num),
-                                                                                           self.save_ckpt_step)))
+            save_checkpoint(self.network, os.path.join(self.output_dir,
+                                                       "tiny_bert_{}_{}.ckpt".format(int(saved_ckpt_num),
+                                                                                     self.save_ckpt_step)))
 
 class LossCallBack(Callback):
     """
@@ -113,7 +113,7 @@ class EvalCallBack(Callback):
                 eval_model_ckpt_file = "eval_model.ckpt"
                 if os.path.exists(eval_model_ckpt_file):
                     os.remove(eval_model_ckpt_file)
-                _exec_save_checkpoint(self.network, eval_model_ckpt_file)
+                save_checkpoint(self.network, eval_model_ckpt_file)
 
 class BertLearningRate(LearningRateSchedule):
     """

tests/ut/python/utils/test_serialize.py

@@ -31,7 +31,7 @@ from mindspore.nn.optim.momentum import Momentum
 from mindspore.ops import operations as P
 from mindspore.train.callback import _CheckpointManager
 from mindspore.train.serialization import save_checkpoint, load_checkpoint, load_param_into_net, \
-    _exec_save_checkpoint, export, _save_graph
+     export, _save_graph
 from ..ut_filter import non_graph_engine
 
 context.set_context(mode=context.GRAPH_MODE, print_file_path="print/print.pb")
@@ -95,8 +95,8 @@ def test_save_graph():
     os.remove(output_file)
 
 
-def test_save_checkpoint():
-    """ test_save_checkpoint """
+def test_save_checkpoint_for_list():
+    """ test save_checkpoint for list"""
     parameter_list = []
     one_param = {}
     param1 = {}
@@ -280,14 +280,15 @@ def test_load_param_into_net():
     assert net.conv1.weight.default_input.asnumpy()[0][0][0][0] == 1
 
 
-def test_exec_save_checkpoint():
+def test_save_checkpoint_for_network():
+    """ test save_checkpoint for network"""
     net = Net()
     loss = SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True)
     opt = Momentum(net.trainable_params(), 0.0, 0.9, 0.0001, 1024)
 
     loss_net = WithLossCell(net, loss)
     train_network = TrainOneStepCell(loss_net, opt)
-    _exec_save_checkpoint(train_network, ckpt_file_name="./new_ckpt.ckpt")
+    save_checkpoint(train_network, ckpt_file_name="./new_ckpt.ckpt")
 
     load_checkpoint("new_ckpt.ckpt")