llama : support InternLM2 (#5184)

* support InternLM2 inference
  * add add_space_prefix KV pair

1 files changed, 152 insertions, 0 deletions

diff --git a/convert-hf-to-gguf.py b/convert-hf-to-gguf.py
index 6ab7f486..4ebab07b 100755
--- a/convert-hf-to-gguf.py
+++ b/convert-hf-to-gguf.py
@@ -203,6 +203,8 @@ class Model:
             return CodeShellModel
         if model_architecture == "OrionForCausalLM":
             return OrionModel
+        if model_architecture == "InternLM2ForCausalLM":
+            return InternLM2Model
         return Model
 
     def _is_model_safetensors(self) -> bool:
@@ -254,6 +256,8 @@ class Model:
             return gguf.MODEL_ARCH.CODESHELL
         if arch == "OrionForCausalLM":
             return gguf.MODEL_ARCH.ORION
+        if arch == "InternLM2ForCausalLM":
+            return gguf.MODEL_ARCH.INTERNLM2
 
         raise NotImplementedError(f'Architecture "{arch}" not supported!')
 
@@ -1344,6 +1348,154 @@ class CodeShellModel(Model):
                 self.gguf_writer.add_tensor("output.weight", data)
                 print(name, f"=> output.weight, shape = {data.shape}, {old_dtype} --> {data.dtype}")
 
+
+class InternLM2Model(Model):
+    def set_vocab(self):
+        # (TODO): Is there a better way?
+        # Copy from _set_vocab_sentencepiece, The only difference is that we will treat the character
+        # \x00 specially and convert it into an emoji character to prevent it from being mistakenly
+        # recognized as an empty string in C++.
+        from sentencepiece import SentencePieceProcessor
+        from sentencepiece import sentencepiece_model_pb2 as model
+
+        tokenizer_path = self.dir_model / 'tokenizer.model'
+
+        tokens: list[bytes] = []
+        scores: list[float] = []
+        toktypes: list[int] = []
+
+        if not tokenizer_path.is_file():
+            print(f'Error: Missing {tokenizer_path}', file=sys.stderr)
+            sys.exit(1)
+
+        sentencepiece_model = model.ModelProto()
+        sentencepiece_model.ParseFromString(open(tokenizer_path, "rb").read())
+        add_prefix = sentencepiece_model.normalizer_spec.add_dummy_prefix
+
+        tokenizer = SentencePieceProcessor(str(tokenizer_path))
+        vocab_size = self.hparams.get('vocab_size', tokenizer.vocab_size())
+
+        for token_id in range(vocab_size):
+            piece = tokenizer.id_to_piece(token_id)
+            text = piece.encode("utf-8")
+            score = tokenizer.get_score(token_id)
+            if text == b"\x00":
+                # (TODO): fixme
+                # Hack here and replace the \x00 characters.
+                print(f"InternLM2 convert token '{text}' to '🐉'!")
+                text = "🐉"
+
+            toktype = SentencePieceTokenTypes.NORMAL
+            if tokenizer.is_unknown(token_id):
+                toktype = SentencePieceTokenTypes.UNKNOWN
+            elif tokenizer.is_control(token_id):
+                toktype = SentencePieceTokenTypes.CONTROL
+            elif tokenizer.is_unused(token_id):
+                toktype = SentencePieceTokenTypes.UNUSED
+            elif tokenizer.is_byte(token_id):
+                toktype = SentencePieceTokenTypes.BYTE
+
+            tokens.append(text)
+            scores.append(score)
+            toktypes.append(toktype)
+
+        added_tokens_file = self.dir_model / 'added_tokens.json'
+        if added_tokens_file.is_file():
+            with open(added_tokens_file, "r", encoding="utf-8") as f:
+                added_tokens_json = json.load(f)
+
+                for key in added_tokens_json:
+                    tokens.append(key.encode("utf-8"))
+                    scores.append(-1000.0)
+                    toktypes.append(SentencePieceTokenTypes.USER_DEFINED)
+
+        self.gguf_writer.add_tokenizer_model("llama")
+        self.gguf_writer.add_token_list(tokens)
+        self.gguf_writer.add_token_scores(scores)
+        self.gguf_writer.add_token_types(toktypes)
+        self.gguf_writer.add_add_space_prefix(add_prefix)
+
+        special_vocab = gguf.SpecialVocab(self.dir_model, n_vocab=len(tokens))
+        special_vocab.add_to_gguf(self.gguf_writer)
+
+    def set_gguf_parameters(self):
+        self.gguf_writer.add_name("InternLM2")
+        self.gguf_writer.add_context_length(self.hparams["max_position_embeddings"])
+        self.gguf_writer.add_block_count(self.hparams["num_hidden_layers"])
+        self.gguf_writer.add_embedding_length(self.hparams["hidden_size"])
+        self.gguf_writer.add_feed_forward_length(self.hparams["intermediate_size"])
+        self.gguf_writer.add_rope_freq_base(self.hparams["rope_theta"])
+        self.gguf_writer.add_head_count(self.hparams["num_attention_heads"])
+        self.gguf_writer.add_layer_norm_rms_eps(self.hparams["rms_norm_eps"])
+        self.gguf_writer.add_head_count_kv(self.hparams["num_key_value_heads"])
+
+    def post_write_tensors(self, tensor_map, name, data_torch):
+        old_dtype = data_torch.dtype
+
+        # convert any unsupported data types to float32
+        if data_torch.dtype not in (torch.float16, torch.float32):
+            data_torch = data_torch.to(torch.float32)
+
+        data = data_torch.squeeze().numpy()
+
+        # map tensor names
+        new_name = tensor_map.get_name(name, try_suffixes=(".weight", ".bias"))
+        if new_name is None:
+            print(f"Can not map tensor {name!r}")
+            sys.exit()
+
+        n_dims = len(data.shape)
+        data_dtype = data.dtype
+
+        # if f32 desired, convert any float16 to float32
+        if self.ftype == 0 and data_dtype == np.float16:
+            data = data.astype(np.float32)
+
+        # TODO: Why cant we use these float16 as-is? There should be not reason to store float16 as float32
+        if self.ftype == 1 and data_dtype == np.float16 and n_dims == 1:
+            data = data.astype(np.float32)
+
+        # if f16 desired, convert any float32 2-dim weight tensors to float16
+        if self.ftype == 1 and data_dtype == np.float32 and name.endswith(".weight") and n_dims == 2:
+            data = data.astype(np.float16)
+
+        print(f"{new_name}, n_dims = {n_dims}, {old_dtype} --> {data.dtype}")
+        self.gguf_writer.add_tensor(new_name, data)
+
+    def write_tensors(self):
+        from einops import rearrange
+
+        num_heads = self.hparams.get("num_attention_heads")
+        num_kv_heads = self.hparams.get("num_key_value_heads")
+        hidden_size = self.hparams.get("hidden_size")
+        q_per_kv = num_heads // num_kv_heads
+        head_dim = hidden_size // num_heads
+        num_groups = num_heads // q_per_kv
+
+        block_count = self.hparams["num_hidden_layers"]
+        model_kv = dict(self.get_tensors())
+        tensor_map = gguf.get_tensor_name_map(self.model_arch, block_count)
+        qkv_pattern = r"model\.layers\.(\d+)\.attention\.wqkv"
+        for name, data_torch in model_kv.items():
+            # we don't need these
+            if name.endswith(".rotary_emb.inv_freq"):
+                continue
+
+            if re.match(qkv_pattern, name):
+                bid = re.findall(qkv_pattern, name)[0]
+                qkv = data_torch
+                qkv = rearrange(qkv.T, " o (g n i) ->o g n i", g=num_groups, n=q_per_kv + 2, i=head_dim)
+                q, k, v = qkv[..., : q_per_kv, :], qkv[..., q_per_kv: q_per_kv + 1, :], qkv[..., q_per_kv + 1: q_per_kv + 2, :]
+                q = rearrange(q, " o g n i ->  o (g n i)").T
+                k = rearrange(k, " o g n i ->  o (g n i)").T
+                v = rearrange(v, " o g n i ->  o (g n i)").T
+                self.post_write_tensors(tensor_map, f"model.layers.{bid}.attention.wq.weight", q)
+                self.post_write_tensors(tensor_map, f"model.layers.{bid}.attention.wk.weight", k)
+                self.post_write_tensors(tensor_map, f"model.layers.{bid}.attention.wv.weight", v)
+            else:
+                self.post_write_tensors(tensor_map, name, data_torch)
+
+
 ###### CONVERSION LOGIC ######