Support Llama3 (#8315)

* support llama-3

* Add llama-3 tokenizer

* fix for llama3

Author: ZHUI

llm/finetune_generation.py

@@ -45,6 +45,7 @@
     AutoConfig,
     AutoModelForCausalLM,
     AutoTokenizer,
+    Llama3Tokenizer,
     LlamaTokenizer,
 )
 from paddlenlp.utils.log import logger
@@ -232,7 +233,7 @@ def neft_post_hook(module, input, output):
     if tokenizer.chat_template is not None:
         data_args.eval_with_do_generation = False
 
-    if isinstance(tokenizer, LlamaTokenizer):
+    if isinstance(tokenizer, LlamaTokenizer) or isinstance(tokenizer, Llama3Tokenizer):
         tokenizer.pad_token_id = tokenizer.eos_token_id
 
     if data_args.dataset_name_or_path is None:

paddlenlp/transformers/auto/tokenizer.py

@@ -189,13 +189,20 @@ def _get_tokenizer_class_from_config(cls, pretrained_model_name_or_path, config_
             init_class = init_kwargs.pop("tokenizer_class", None)
 
         if init_class:
-            class_name = cls._name_mapping[init_class]
-            import_class = import_module(f"paddlenlp.transformers.{class_name}.tokenizer")
-            tokenizer_class = getattr(import_class, init_class)
-            if use_fast:
-                fast_tokenizer_class = cls._get_fast_tokenizer_class(init_class, class_name)
-                tokenizer_class = fast_tokenizer_class if fast_tokenizer_class else tokenizer_class
-            return tokenizer_class
+            if init_class in cls._name_mapping:
+                class_name = cls._name_mapping[init_class]
+                import_class = import_module(f"paddlenlp.transformers.{class_name}.tokenizer")
+                tokenizer_class = getattr(import_class, init_class)
+                if use_fast:
+                    fast_tokenizer_class = cls._get_fast_tokenizer_class(init_class, class_name)
+                    tokenizer_class = fast_tokenizer_class if fast_tokenizer_class else tokenizer_class
+                return tokenizer_class
+            else:
+                import_class = import_module("paddlenlp.transformers")
+                tokenizer_class = getattr(import_class, init_class, None)
+                assert tokenizer_class is not None, f"Can't find tokenizer {init_class}"
+                return tokenizer_class
+
         # If no `init_class`, we use pattern recognition to recognize the tokenizer class.
         else:
             # TODO: Potential issue https://github.com/PaddlePaddle/PaddleNLP/pull/3786#discussion_r1024689810

paddlenlp/transformers/llama/configuration.py

@@ -147,6 +147,7 @@ def __init__(
         num_key_value_heads=None,
         initializer_range=0.02,
         rms_norm_eps=1e-6,
+        rope_theta=10000.0,
         use_cache=True,
         use_recompute=False,
         recompute_granularity="full",
@@ -188,6 +189,7 @@ def __init__(
 
         self.initializer_range = initializer_range
         self.rms_norm_eps = rms_norm_eps
+        self.rope_theta = rope_theta
 
         self.use_cache = use_cache
         self.use_recompute = use_recompute

paddlenlp/transformers/llama/modeling.py

@@ -813,24 +813,28 @@ def _init_rope(self):
             self.rotary_emb = LlamaRotaryEmbedding(
                 self.head_dim,
                 max_position_embeddings=self.max_position_embeddings,
+                base=self.config.rope_theta,
             )
         elif self.config.rope_scaling_type == "linear":
             self.rotary_emb = LlamaLinearScalingRotaryEmbedding(
                 self.head_dim,
                 max_position_embeddings=self.max_position_embeddings,
                 scaling_factor=self.config.rope_scaling_factor,
+                base=self.config.rope_theta,
             )
         elif self.config.rope_scaling_type == "ntk":
             self.rotary_emb = LlamaNTKScalingRotaryEmbedding(
                 self.head_dim,
                 max_position_embeddings=self.max_position_embeddings,
                 scaling_factor=self.config.rope_scaling_factor,
+                base=self.config.rope_theta,
             )
         elif self.config.rope_scaling_type == "dynamic_ntk":
             self.rotary_emb = LlamaDynamicNTKScalingRotaryEmbedding(
                 self.head_dim,
                 max_position_embeddings=self.max_position_embeddings,
                 scaling_factor=self.config.rope_scaling_factor,
+                base=self.config.rope_theta,
             )
         else:
             raise ValueError(f"Unknown RoPE scaling type {self.config.rope_scaling_type}")
@@ -903,6 +907,7 @@ def forward(
             query_states = self.q_proj(hidden_states)
             key_states = self.k_proj(hidden_states)
             value_states = self.v_proj(hidden_states)
+
             if self.reshard_layer is not None:
                 if self.sequence_parallel:
                     assert self.seq_length % self.config.sep_parallel_degree == 0
@@ -1027,7 +1032,6 @@ def forward(
             value_states = paddle.concat([past_key_value[1], value_states], axis=1)
 
         past_key_value = (key_states, value_states) if use_cache else None
-
         if self.kv_indices is not None:
             key_states = paddle.index_select(key_states, self.kv_indices, axis=2)
             value_states = paddle.index_select(value_states, self.kv_indices, axis=2)
@@ -1036,7 +1040,7 @@ def forward(
         # repeat k/v heads if n_kv_heads < n_heads
         # paddle version > 2.6 or develop support flash-attn with gqa/mqa
         paddle_version = float(paddle.__version__[:3])
-        if (paddle_version != 0.0) and (paddle_version <= 2.6):
+        if not self.config.use_flash_attention or ((paddle_version != 0.0) and (paddle_version <= 2.6)):
             key_states = repeat_kv(key_states, self.num_key_value_groups)
             value_states = repeat_kv(value_states, self.num_key_value_groups)
 
@@ -1560,7 +1564,6 @@ def forward(
             else:
                 attention_mask = attention_mask.astype("bool")
         hidden_states = inputs_embeds
-
         # decoder layers
         all_hidden_states = () if output_hidden_states else None
         all_self_attns = () if output_attentions else None