add model init api to compile df graph before exec

mindspore/common/api.py

@@ -383,6 +383,10 @@ class _Executor:
                 obj.parameter_layout_dict = self._executor.get_parameter_layout(phase)
                 obj.load_parameter_slice(params)
 
+        # set parallel inputs in sink mode
+        if auto_parallel_mode and (args and isinstance(args[0], Tensor) and args[0].virtual_flag):
+            obj.set_parallel_input_with_inputs(*args)
+
         # the following GE init process is not needed when use vm or ms backend
         if enable_ge:
             # decide whether to sink based on whether the inputs is virtual or not

mindspore/nn/cell.py

@@ -288,6 +288,15 @@ class Cell:
                 parallel_inputs_run.append(new_tensor)
         return tuple(parallel_inputs_run)
 
+    def set_parallel_input_with_inputs(self, *inputs):
+        """
+        Slice inputs tensors by parallel strategies, and set the sliced inputs to `_parallel_input_run`
+
+        Args:
+            inputs (tuple): inputs of construct method.
+        """
+        self._parallel_inputs_run = self._load_inputs(*inputs)
+
     def _get_construct_inputs_number_and_name(self):
         """Compute self._construct_inputs_names and self._construct_inputs_num"""
         import inspect
@@ -304,6 +313,15 @@ class Cell:
         self._construct_inputs_names = self._construct_inputs_names[1:self._construct_inputs_num]
         self._construct_inputs_num = self._construct_inputs_num - 1
 
+    def compile(self, *inputs):
+        """
+        Compiles cell.
+
+        Args:
+            inputs (tuple): Input parameters.
+        """
+        _executor.compile(self, *inputs, phase=self.phase, auto_parallel_mode=self._auto_parallel_mode)
+
     def compile_and_run(self, *inputs):
         """
         Compiles and runs cell.
@@ -314,13 +332,14 @@ class Cell:
         Returns:
             Object, the result of executing.
         """
-        _, compile_flag = _executor.compile(self, *inputs, phase=self.phase,
-                                            auto_parallel_mode=self._auto_parallel_mode)
+        _executor.compile(self, *inputs, phase=self.phase, auto_parallel_mode=self._auto_parallel_mode)
 
         if self._auto_parallel_mode:
-            if inputs and isinstance(inputs[0], Tensor) and inputs[0].virtual_flag and (not compile_flag):
+            if inputs and isinstance(inputs[0], Tensor) and inputs[0].virtual_flag:
+                # get parallel inputs in sink mode, parallel inputs set in _executor.compile
                 parallel_inputs_run = self._parallel_inputs_run
             else:
+                # set parallel inputs in normal mode
                 self._parallel_inputs_run = self._load_inputs(*inputs)
                 parallel_inputs_run = self._parallel_inputs_run
             return _executor(self, *parallel_inputs_run, phase=self.phase)

mindspore/train/model.py

@@ -217,6 +217,94 @@ class Model:
             scaling_sens /= self._device_number
         return scaling_sens
 
+    def _exec_preprocess(self, network, is_train, phase, dataset, dataset_sink_mode):
+        """Initializes dataset."""
+        need_wrap = False
+        if dataset_sink_mode:
+            # remove later to deal with loop sink
+            if not hasattr(dataset, '__ME_INITED__') and context.get_context("device_target") == "Ascend" \
+                    and not context.get_context("enable_ge"):
+                need_wrap = True
+
+            if not is_train:
+                dataset.__loop_size__ = 1
+
+        dataset_helper = DatasetHelper(dataset, dataset_sink_mode)
+
+        # remove later to deal with loop sink
+        if need_wrap:
+            network = nn.DataWrapper(network, *(dataset_helper.types_shapes()), dataset.__ME_INITED__)
+            network.set_train(is_train)
+            network.phase = phase
+
+        return dataset_helper, network
+
+    def init(self, train_dataset=None, valid_dataset=None):
+        """
+        Initializes compute graphs and data graphs with sink mode.
+
+        Note:
+            Pre-init process only supports `GRAPH_MODE` and `Ascend` target currently.
+
+        Args:
+            train_dataset (Dataset): A training dataset iterator. If define `train_dataset`, training graphs will be
+                                     initialized. Default: None.
+            valid_dataset (Dataset): A evaluating dataset iterator. If define `valid_dataset`, evaluation graphs will
+                                     be initialized, and `metrics` in `Model` can not be None. Default: None.
+
+        Examples:
+            >>> train_dataset = get_train_dataset()
+            >>> valid_dataset = get_valid_dataset()
+            >>> net = Net()
+            >>> loss = nn.SoftmaxCrossEntropyWithLogits(is_grad=False, sparse=True)
+            >>> optim = Momentum(params=net.trainable_params(), learning_rate=0.1, momentum=0.9)
+            >>> model = Model(net, loss_fn=loss, optimizer=optim, metrics={'acc'})
+            >>> model.init(train_dataset, valid_dataset)
+            >>> model.train(2, train_dataset)
+            >>> model.eval(valid_dataset)
+        """
+        if context.get_context("mode") != context.GRAPH_MODE or context.get_context("device_target") != "Ascend":
+            raise RuntimeError('Pre-init process only supports GRAPH MODE and Ascend target currently.')
+
+        if not train_dataset and not valid_dataset:
+            raise ValueError('Both train_dataset and valid_dataset can not be None or empty.')
+
+        _device_number_check(self._parallel_mode, self._device_number)
+
+        if train_dataset:
+            _parameter_broadcast_check(self._parallel_mode, self._parameter_broadcast)
+            self._train_network.set_train()
+            self._train_network.phase = 'train'
+
+            if self._parameter_broadcast:
+                self._train_network.set_broadcast_flag()
+
+            train_dataset_helper, train_network = self._exec_preprocess(self._train_network,
+                                                                        is_train=True,
+                                                                        phase='train',
+                                                                        dataset=train_dataset,
+                                                                        dataset_sink_mode=True)
+            self._train_network = train_network
+            for inputs in train_dataset_helper:
+                self._train_network.compile(*inputs)
+                break
+
+        if valid_dataset:
+            if not self._metric_fns:
+                raise RuntimeError('If define `valid_dataset`, metric fn can not be None or empty.')
+
+            self._eval_network.set_train(False)
+            self._eval_network.phase = 'eval'
+            valid_dataset_helper, eval_network = self._exec_preprocess(self._eval_network,
+                                                                       is_train=False,
+                                                                       phase='eval',
+                                                                       dataset=valid_dataset,
+                                                                       dataset_sink_mode=True)
+            self._eval_network = eval_network
+            for inputs in valid_dataset_helper:
+                self._eval_network.compile(*inputs)
+                break
+
     def _train(self, epoch, train_dataset, callbacks=None, dataset_sink_mode=True):
         """
         Training.
@@ -277,21 +365,15 @@ class Model:
             list_callback (_ListCallback): Executor of callback list. Default: None.
             cb_params (_InternalCallbackParam): Callback parameters. Default: None.
         """
-        # remove later to deal with loop sink
-        need_wrap = False
-        if not hasattr(train_dataset, '__ME_INITED__') and context.get_context("device_target") == "Ascend" \
-                and not context.get_context("enable_ge"):
-            need_wrap = True
-
-        dataset_helper = DatasetHelper(train_dataset)
-        # remove later to deal with loop sink
-        if need_wrap:
-            self._train_network = nn.DataWrapper(self._train_network, *(dataset_helper.types_shapes()),
-                                                 train_dataset.__ME_INITED__)
-            cb_params.train_network = self._train_network
-            self._train_network.set_train()
-
+        dataset_helper, train_network = self._exec_preprocess(self._train_network,
+                                                              is_train=True,
+                                                              phase='train',
+                                                              dataset=train_dataset,
+                                                              dataset_sink_mode=True)
+        self._train_network = train_network
+        cb_params.train_network = self._train_network
         cb_params.cur_step_num = 0
+
         loop_size = dataset_helper.loop_size()
         run_context = RunContext(cb_params)
         list_callback.begin(run_context)
@@ -331,7 +413,11 @@ class Model:
             list_callback (_ListCallback): Executor of callback list. Default: None.
             cb_params (_InternalCallbackParam): Callback parameters. Default: None.
         """
-        dataset_helper = DatasetHelper(train_dataset, dataset_sink_mode=False)
+        dataset_helper, _ = self._exec_preprocess(self._train_network,
+                                                  is_train=True,
+                                                  phase='train',
+                                                  dataset=train_dataset,
+                                                  dataset_sink_mode=False)
         cb_params.cur_step_num = 0
         run_context = RunContext(cb_params)
         list_callback.begin(run_context)
@@ -437,26 +523,15 @@ class Model:
         Returns:
             Dict, returns the loss value & metrics values for the model in test mode.
         """
-        _device_number_check(self._parallel_mode, self._device_number)
-
         run_context = RunContext(cb_params)
 
-        # remove later to deal with loop sink
-        need_wrap = False
-        if not hasattr(valid_dataset, '__ME_INITED__') and context.get_context("device_target") == "Ascend" \
-                and not context.get_context("enable_ge"):
-            need_wrap = True
-
-        valid_dataset.__loop_size__ = 1
-        dataset_helper = DatasetHelper(valid_dataset)
-
-        # remove later to deal with loop sink
-        if need_wrap:
-            self._eval_network = nn.DataWrapper(self._eval_network, *(dataset_helper.types_shapes()),
-                                                valid_dataset.__ME_INITED__)
-            self._eval_network.set_train(mode=False)
-            self._eval_network.phase = 'eval'
-
+        dataset_helper, eval_network = self._exec_preprocess(self._eval_network,
+                                                             is_train=False,
+                                                             phase='eval',
+                                                             dataset=valid_dataset,
+                                                             dataset_sink_mode=True)
+        self._eval_network = eval_network
+        cb_params.eval_network = self._eval_network
         list_callback.begin(run_context)
 
         for inputs in dataset_helper:
@@ -490,7 +565,11 @@ class Model:
         run_context = RunContext(cb_params)
         list_callback.begin(run_context)
 
-        dataset_helper = DatasetHelper(valid_dataset, dataset_sink_mode=False)
+        dataset_helper, _ = self._exec_preprocess(self._eval_network,
+                                                  is_train=False,
+                                                  phase='eval',
+                                                  dataset=valid_dataset,
+                                                  dataset_sink_mode=False)
         for next_element in dataset_helper:
             cb_params.cur_step_num += 1
             list_callback.step_begin(run_context)
@@ -532,6 +611,7 @@ class Model:
             >>> model.eval(dataset)
         """
         check_bool(dataset_sink_mode)
+        _device_number_check(self._parallel_mode, self._device_number)
         if not self._metric_fns:
             raise ValueError("metric fn can not be None or empty.")
 

tests/ut/python/train/test_training.py

@@ -68,12 +68,12 @@ class LossNet(nn.Cell):
         return out
 
 
-def get_model():
+def get_model(metrics=None):
     """ get_model """
     net = Net()
     loss = nn.SoftmaxCrossEntropyWithLogits()
     optim = Momentum(net.trainable_params(), learning_rate=0.1, momentum=0.9)
-    model = Model(net, loss_fn=loss, optimizer=optim, metrics=None)
+    model = Model(net, loss_fn=loss, optimizer=optim, metrics=metrics)
     return model
 
 
@@ -215,8 +215,27 @@ def test_model_build_abnormal_string():
         assert err
 
 
-def test_model_init_error():
+def test_model_init():
     """ test_model_init_error """
+    train_dataset = get_dataset()
+    eval_dataset = get_dataset()
+
+    with pytest.raises(RuntimeError):
+        context.set_context(mode=context.PYNATIVE_MODE)
+        get_model().init(train_dataset)
+
+    context.set_context(mode=context.GRAPH_MODE)
+    get_model().init(train_dataset)
+    get_model(metrics={'acc'}).init(eval_dataset)
+
+    with pytest.raises(RuntimeError):
+        get_model().init(train_dataset, eval_dataset)
+    with pytest.raises(ValueError):
+        get_model().init()
+
+
+def test_init_model_error():
+    """ test_init_model_error """
     net = nn.ReLU()
     loss = nn.SoftmaxCrossEntropyWithLogits()
     with pytest.raises(KeyError):