[Seq2Seq Templates] Correct some TF-serving errors and add gradient...

[Seq2Seq Templates] Correct some TF-serving errors and add gradient checkpointing to PT by default. (#9334)

* correct tests

* correct shape and get_tf_activation

* more correction tf

* add gradient checkpointing to templates

* correct typo

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/configuration_{{cookiecutter.lowercase_modelname}}.py

@@ -74,6 +74,8 @@ class {{cookiecutter.camelcase_modelname}}Config(PretrainedConfig):
         use_cache (:obj:`bool`, `optional`, defaults to :obj:`True`):
             Whether or not the model should return the last key/values attentions (not used by all models). Only
             relevant if ``config.is_decoder=True``.
+        gradient_checkpointing (:obj:`bool`, `optional`, defaults to :obj:`False`):
+            If True, use gradient checkpointing to save memory at the expense of slower backward pass.
         {% else -%}
         vocab_size (:obj:`int`, `optional`, defaults to 50265):
             Vocabulary size of the {{cookiecutter.modelname}} model. Defines the number of different tokens that can be represented by the
@@ -172,6 +174,7 @@ class {{cookiecutter.camelcase_modelname}}Config(PretrainedConfig):
         init_std=0.02,
         decoder_start_token_id=2,
         classifier_dropout=0.0,
+        gradient_checkpointing=False,
         {% endif -%}
         pad_token_id=1,
         bos_token_id=0,
@@ -222,6 +225,7 @@ class {{cookiecutter.camelcase_modelname}}Config(PretrainedConfig):
         self.classifier_dropout = classifier_dropout
         self.use_cache = use_cache
         self.num_hidden_layers = encoder_layers
+        self.gradient_checkpointing = gradient_checkpointing
         {% endif -%}
 
     {% if cookiecutter.is_encoder_decoder_model == "False" %}

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/modeling_tf_{{cookiecutter.lowercase_modelname}}.py

@@ -20,6 +20,7 @@
 import tensorflow as tf
 
 from transformers.modeling_tf_outputs import TFCausalLMOutput
+
 from ...activations_tf import get_tf_activation
 from ...file_utils import (
     MULTIPLE_CHOICE_DUMMY_INPUTS,
@@ -37,14 +38,14 @@ from ...modeling_tf_outputs import (
     TFTokenClassifierOutput,
 )
 from ...modeling_tf_utils import (
+    TFCausalLanguageModelingLoss,
     TFMaskedLanguageModelingLoss,
     TFMultipleChoiceLoss,
     TFPreTrainedModel,
     TFQuestionAnsweringLoss,
     TFSequenceClassificationLoss,
-    TFTokenClassificationLoss,
-    TFCausalLanguageModelingLoss,
     TFSequenceSummary,
+    TFTokenClassificationLoss,
     get_initializer,
     input_processing,
     keras_serializable,
@@ -503,7 +504,7 @@ class TF{{cookiecutter.camelcase_modelname}}MainLayer(tf.keras.layers.Layer):
 
     def set_input_embeddings(self, value):
         self.embeddings.word_embeddings = value
-        self.embeddings.vocab_size = value.shape[0]
+        self.embeddings.vocab_size = shape_list(value)[0]
 
     def _prune_heads(self, heads_to_prune):
         """Prunes heads of the model.
@@ -1109,7 +1110,7 @@ class TF{{cookiecutter.camelcase_modelname}}ForMultipleChoice(TF{{cookiecutter.c
         Returns:
             tf.Tensor with dummy inputs
         """
-        return {"input_ids": tf.constant(MULTIPLE_CHOICE_DUMMY_INPUTS)}
+        return {"input_ids": tf.convert_to_tensor(MULTIPLE_CHOICE_DUMMY_INPUTS)}
 
     @add_start_docstrings_to_model_forward({{cookiecutter.uppercase_modelname}}_INPUTS_DOCSTRING.format("batch_size, num_choices, sequence_length"))
     @add_code_sample_docstrings(
@@ -1404,7 +1405,7 @@ from typing import Dict, Optional, Tuple, Union
 
 import tensorflow as tf
 
-from ...activations_tf import ACT2FN
+from ...activations_tf import get_tf_activation
 from ...file_utils import (
     add_code_sample_docstrings,
     add_start_docstrings,
@@ -1640,7 +1641,7 @@ class TF{{cookiecutter.camelcase_modelname}}EncoderLayer(tf.keras.layers.Layer):
         )
         self.self_attn_layer_norm = tf.keras.layers.LayerNormalization(epsilon=1e-5, name="self_attn_layer_norm")
         self.dropout = tf.keras.layers.Dropout(config.dropout)
-        self.activation_fn = ACT2FN[config.activation_function]
+        self.activation_fn = get_tf_activation(config.activation_function)
         self.activation_dropout = tf.keras.layers.Dropout(config.activation_dropout)
         self.fc1 = tf.keras.layers.Dense(config.encoder_ffn_dim, name="fc1")
         self.fc2 = tf.keras.layers.Dense(self.embed_dim, name="fc2")
@@ -1689,7 +1690,7 @@ class TF{{cookiecutter.camelcase_modelname}}DecoderLayer(tf.keras.layers.Layer):
             is_decoder=True,
         )
         self.dropout = tf.keras.layers.Dropout(config.dropout)
-        self.activation_fn = ACT2FN[config.activation_function]
+        self.activation_fn = get_tf_activation(config.activation_function)
         self.activation_dropout = tf.keras.layers.Dropout(config.activation_dropout)
 
         self.self_attn_layer_norm = tf.keras.layers.LayerNormalization(epsilon=1e-5, name="self_attn_layer_norm")
@@ -1782,8 +1783,8 @@ class TF{{cookiecutter.camelcase_modelname}}PreTrainedModel(TFPreTrainedModel):
     @property
     def dummy_inputs(self):
         pad_token = 1
-        input_ids = tf.cast(tf.constant(DUMMY_INPUTS), tf.int32)
-        decoder_input_ids = tf.cast(tf.constant(DUMMY_INPUTS), tf.int32)
+        input_ids = tf.cast(tf.convert_to_tensor(DUMMY_INPUTS), tf.int32)
+        decoder_input_ids = tf.cast(tf.convert_to_tensor(DUMMY_INPUTS), tf.int32)
         dummy_inputs = {
             "decoder_input_ids": decoder_input_ids,
             "attention_mask": tf.math.not_equal(input_ids, pad_token),
@@ -2134,7 +2135,7 @@ class TF{{cookiecutter.camelcase_modelname}}Decoder(tf.keras.layers.Layer):
             raise ValueError("You have to specify either decoder_input_ids or decoder_inputs_embeds")
 
         past_key_values_length = (
-            inputs["past_key_values"][0][0].shape[2] if inputs["past_key_values"] is not None else 0
+            shape_list(inputs["past_key_values"][0][0])[2] if inputs["past_key_values"] is not None else 0
         )
 
         # embed positions
@@ -2390,7 +2391,7 @@ class TF{{cookiecutter.camelcase_modelname}}ForConditionalGeneration(TF{{cookiec
         # {{cookiecutter.uppercase_modelname}} is a special case where the bias has two dimensions
         # and not named just `bias`
         if new_num_tokens is not None:
-            num_tokens_to_copy = min(self.final_logits_bias.shape[0], new_num_tokens)
+            num_tokens_to_copy = min(shape_list(self.final_logits_bias)[0], new_num_tokens)
             init_bias = tf.zeros((new_num_tokens,))
             init_bias[:num_tokens_to_copy] = self.final_logits_bias.value()[:num_tokens_to_copy]
             self.final_logits_bias = self.add_weight(

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/modeling_{{cookiecutter.lowercase_modelname}}.py

@@ -25,6 +25,7 @@ import torch.utils.checkpoint
 from torch import nn
 from torch.nn import CrossEntropyLoss, MSELoss
 
+from ...activations import ACT2FN
 from ...file_utils import (
     add_code_sample_docstrings,
     add_start_docstrings,
@@ -48,7 +49,6 @@ from ...modeling_utils import (
     prune_linear_layer,
 )
 from ...utils import logging
-from ...activations import ACT2FN
 from .configuration_{{cookiecutter.lowercase_modelname}} import {{cookiecutter.camelcase_modelname}}Config
 
 
@@ -1809,7 +1809,13 @@ class {{cookiecutter.camelcase_modelname}}EncoderLayer(nn.Module):
         if torch.isinf(hidden_states).any() or torch.isnan(hidden_states).any():
             clamp_value = torch.finfo(hidden_states.dtype).max - 1000
             hidden_states = torch.clamp(hidden_states, min=-clamp_value, max=clamp_value)
-        return hidden_states, attn_weights
+
+        outputs = (hidden_states,)
+
+        if output_attentions:
+            outputs += (attn_weights,)
+
+        return outputs
 
 
 class {{cookiecutter.camelcase_modelname}}DecoderLayer(nn.Module):
@@ -1846,7 +1852,8 @@ class {{cookiecutter.camelcase_modelname}}DecoderLayer(nn.Module):
         encoder_hidden_states: Optional[torch.Tensor] = None,
         encoder_attention_mask: Optional[torch.Tensor] = None,
         past_key_value: Optional[Tuple[torch.Tensor]] = None,
-        output_attentions: Optional[torch.Tensor] = False,
+        output_attentions: Optional[bool] = False,
+        use_cache: Optional[bool] = True,
     ):
         """
         Args:
@@ -1907,12 +1914,15 @@ class {{cookiecutter.camelcase_modelname}}DecoderLayer(nn.Module):
         hidden_states = residual + hidden_states
         hidden_states = self.final_layer_norm(hidden_states)
 
-        return (
-            hidden_states,
-            self_attn_weights,
-            present_key_value,
-            cross_attn_weights,
-        )
+        outputs = (hidden_states,)
+
+        if output_attentions:
+            outputs += (self_attn_weights, cross_attn_weights)
+
+        if use_cache:
+            outputs += (present_key_value,)
+
+        return outputs
 
 
 # Copied from transformers.models.bart.modeling_bart.BartClassificationHead with Bart->{{cookiecutter.camelcase_modelname}}
@@ -2178,12 +2188,28 @@ class {{cookiecutter.camelcase_modelname}}Encoder({{cookiecutter.camelcase_model
             # add LayerDrop (see https://arxiv.org/abs/1909.11556 for description)
             dropout_probability = random.uniform(0, 1)
             if self.training and (dropout_probability < self.layerdrop):  # skip the layer
-                attn = None
+                layer_outputs = (None, None)
+            else:
+                if getattr(self.config, "gradient_checkpointing", False):
+
+                    def create_custom_forward(module):
+                        def custom_forward(*inputs):
+                            return module(*inputs, output_attentions)
+
+                        return custom_forward
+
+                    layer_outputs = torch.utils.checkpoint.checkpoint(
+                        create_custom_forward(encoder_layer),
+                        hidden_states,
+                        attention_mask,
+                    )
                 else:
-                hidden_states, attn = encoder_layer(hidden_states, attention_mask, output_attentions=output_attentions)
+                    layer_outputs = encoder_layer(hidden_states, attention_mask, output_attentions=output_attentions)
+
+                hidden_states = layer_outputs[0]
 
             if output_attentions:
-                all_attentions = all_attentions + (attn,)
+                all_attentions = all_attentions + (layer_outputs[1],)
 
         if output_hidden_states:
             encoder_states = encoder_states + (hidden_states,)
@@ -2355,21 +2381,46 @@ class {{cookiecutter.camelcase_modelname}}Decoder({{cookiecutter.camelcase_model
 
             past_key_value = past_key_values[idx] if past_key_values is not None else None
 
-            hidden_states, layer_self_attn, present_key_value, layer_cross_attn = decoder_layer(
+            if getattr(self.config, "gradient_checkpointing", False):
+                if use_cache:
+                    raise ValueError(
+                        "When using `gradient_checkpointing, make sure that `use_cache=False` and `config.use_cache=False`."
+                    )
+
+                def create_custom_forward(module):
+                    def custom_forward(*inputs):
+                        # None for past_key_value
+                        return module(*inputs, output_attentions, use_cache)
+
+                    return custom_forward
+
+                layer_outputs = torch.utils.checkpoint.checkpoint(
+                    create_custom_forward(decoder_layer),
+                    hidden_states,
+                    combined_attention_mask,
+                    encoder_hidden_states,
+                    encoder_attention_mask,
+                    None,
+                )
+            else:
+
+                layer_outputs = decoder_layer(
                     hidden_states,
                     attention_mask=combined_attention_mask,
                     encoder_hidden_states=encoder_hidden_states,
                     encoder_attention_mask=encoder_attention_mask,
                     past_key_value=past_key_value,
                     output_attentions=output_attentions,
+                    use_cache=use_cache,
                 )
+            hidden_states = layer_outputs[0]
 
             if use_cache:
-                next_decoder_cache += (present_key_value,)
+                next_decoder_cache += (layer_outputs[3 if output_attentions else 1],)
 
             if output_attentions:
-                all_self_attns += (layer_self_attn,)
-                all_cross_attentions += (layer_cross_attn,)
+                all_self_attns += (layer_outputs[1],)
+                all_cross_attentions += (layer_outputs[2],)
 
         # add hidden states from the last decoder layer
         if output_hidden_states:

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/test_modeling_tf_{{cookiecutter.lowercase_modelname}}.py

@@ -532,7 +532,7 @@ class TF{{cookiecutter.camelcase_modelname}}ModelIntegrationTest(unittest.TestCa
         expected_slice = tf.Tensor(
             [[0.7144, 0.8143, -1.2813], [0.7144, 0.8143, -1.2813], [-0.0467, 2.5911, -2.1845]],
         )
-        self.assertTrue(tf.debugging.assert_near(output[:, :3, :3], expected_slice, atol=TOLERANCE))
+        tf.debugging.assert_near(output[:, :3, :3], expected_slice, atol=TOLERANCE)
 
     def test_inference_with_head(self):
         model = TF{{cookiecutter.camelcase_modelname}}ForConditionalGeneration.from_pretrained('{{cookiecutter.checkpoint_identifier}}')
@@ -547,7 +547,7 @@ class TF{{cookiecutter.camelcase_modelname}}ModelIntegrationTest(unittest.TestCa
         expected_slice = tf.Tensor(
             [[0.7144, 0.8143, -1.2813], [0.7144, 0.8143, -1.2813], [-0.0467, 2.5911, -2.1845]],
         )
-        self.assertTrue(tf.debugging.assert_near(output[:, :3, :3], expected_slice, atol=TOLERANCE))
+        tf.debugging.assert_near(output[:, :3, :3], expected_slice, atol=TOLERANCE)
 
     def test_seq_to_seq_generation(self):
         hf = TF{{cookiecutter.camelcase_modelname}}ForConditionalGeneration.from_pretrained('{{cookiecutter.checkpoint_identifier}}')

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/test_modeling_{{cookiecutter.lowercase_modelname}}.py

@@ -683,23 +683,6 @@ class {{cookiecutter.camelcase_modelname}}ModelTest(ModelTesterMixin, Generation
     def test_config(self):
         self.config_tester.run_common_tests()
 
-    def test_initialization_more(self):
-        config, inputs_dict = self.model_tester.prepare_config_and_inputs()
-        model = {{cookiecutter.camelcase_modelname}}Model(config)
-        model.to(torch_device)
-        model.eval()
-        # test init
-        self.assertTrue((model.encoder.embed_tokens.weight == model.shared.weight).all().item())
-
-        def _check_var(module):
-            """Check that we initialized various parameters from N(0, config.init_std)."""
-            self.assertAlmostEqual(torch.std(module.weight).item(), config.init_std, 2)
-
-        _check_var(model.encoder.embed_tokens)
-        _check_var(model.encoder.layers[0].self_attn.k_proj)
-        _check_var(model.encoder.layers[0].fc1)
-        _check_var(model.encoder.embed_positions)
-
     def test_save_load_strict(self):
         config, inputs_dict = self.model_tester.prepare_config_and_inputs()
         for model_class in self.all_model_classes: