chore: import upstream snapshot with attribution

python/sglang/srt/models/exaone4.py

@@ -0,0 +1,713 @@
+from collections.abc import Iterable
+from typing import Any, List, Optional, Tuple, Union
+
+import torch
+from torch import nn
+from transformers import Exaone4Config
+
+from sglang.srt.distributed import get_pp_group
+from sglang.srt.layers.activation import SiluAndMul
+from sglang.srt.layers.layernorm import RMSNorm
+from sglang.srt.layers.linear import (
+    MergedColumnParallelLinear,
+    QKVParallelLinear,
+    RowParallelLinear,
+)
+from sglang.srt.layers.logits_processor import LogitsProcessor, LogitsProcessorOutput
+from sglang.srt.layers.pooler import Pooler, PoolingType
+from sglang.srt.layers.quantization.base_config import QuantizationConfig
+from sglang.srt.layers.radix_attention import RadixAttention
+from sglang.srt.layers.rotary_embedding import get_rope
+from sglang.srt.layers.utils import PPMissingLayer, get_layer_id
+from sglang.srt.layers.vocab_parallel_embedding import (
+    ParallelLMHead,
+    VocabParallelEmbedding,
+)
+from sglang.srt.model_executor.forward_batch_info import ForwardBatch, PPProxyTensors
+from sglang.srt.model_loader.weight_utils import (
+    default_weight_loader,
+    maybe_remap_kv_scale_name,
+)
+from sglang.srt.runtime_context import get_parallel, get_server_args
+from sglang.srt.utils import add_prefix, make_layers
+from sglang.utils import get_exception_traceback, logger
+
+
+# Aligned with HF's implementation, using sliding window inclusive with the last token
+# SGLang assumes exclusive
+def get_attention_sliding_window_size(config):
+    if getattr(config, "sliding_window", None) is not None:
+        return config.sliding_window - 1
+    else:
+        return None
+
+
+class Exaone4GatedMLP(nn.Module):
+    def __init__(
+        self,
+        hidden_size: int,
+        intermediate_size: int,
+        hidden_act: str,
+        quant_config: Optional[QuantizationConfig] = None,
+        bias: bool = False,
+        prefix: str = "",
+    ) -> None:
+        super().__init__()
+        self.gate_up_proj = MergedColumnParallelLinear(
+            hidden_size,
+            [intermediate_size] * 2,
+            bias=bias,
+            quant_config=quant_config,
+            prefix=add_prefix("gate_up_proj", prefix),
+        )
+        self.down_proj = RowParallelLinear(
+            intermediate_size,
+            hidden_size,
+            bias=bias,
+            quant_config=quant_config,
+            prefix=add_prefix("down_proj", prefix),
+        )
+        if hidden_act != "silu":
+            raise ValueError(
+                f"Unsupported activation: {hidden_act}. "
+                "Only silu is supported for now."
+            )
+        self.act_fn = SiluAndMul()
+
+    def forward(self, x):
+        gate_up, _ = self.gate_up_proj(x)
+        x = self.act_fn(gate_up)
+        x, _ = self.down_proj(x)
+        return x
+
+
+class Exaone4Attention(nn.Module):
+    def __init__(
+        self,
+        config,
+        hidden_size: int,
+        num_heads: int,
+        num_kv_heads: int,
+        layer_id: int = 0,
+        head_dim: Optional[int] = None,
+        rms_norm_eps: float = 1e-06,
+        rope_theta: float = 10000,
+        rope_scaling: Optional[dict[str, Any]] = None,
+        max_position_embeddings: int = 8192,
+        quant_config: Optional[QuantizationConfig] = None,
+        bias: bool = False,
+        bias_o_proj: bool = False,
+        prefix: str = "",
+    ) -> None:
+        super().__init__()
+        self.hidden_size = hidden_size
+        tp_size = get_parallel().tp_size
+
+        attn_tp_rank = get_parallel().attn_tp_rank
+        attn_tp_size = get_parallel().attn_tp_size
+
+        self.total_num_heads = num_heads
+        assert self.total_num_heads % tp_size == 0
+        self.num_heads = self.total_num_heads // tp_size
+        self.total_num_kv_heads = num_kv_heads
+        if self.total_num_kv_heads >= tp_size:
+            # Number of KV heads is greater than TP size, so we partition
+            # the KV heads across multiple tensor parallel GPUs.
+            assert self.total_num_kv_heads % tp_size == 0
+        else:
+            # Number of KV heads is less than TP size, so we replicate
+            # the KV heads across multiple tensor parallel GPUs.
+            assert tp_size % self.total_num_kv_heads == 0
+        self.num_kv_heads = max(1, self.total_num_kv_heads // tp_size)
+
+        self.head_dim = head_dim or hidden_size // self.total_num_heads
+        self.q_size = self.num_heads * self.head_dim
+        self.kv_size = self.num_kv_heads * self.head_dim
+        self.scaling = self.head_dim**-0.5
+        self.rope_theta = rope_theta
+        self.max_position_embeddings = max_position_embeddings
+
+        self.qkv_proj = QKVParallelLinear(
+            hidden_size=hidden_size,
+            head_size=self.head_dim,
+            total_num_heads=self.total_num_heads,
+            total_num_kv_heads=self.total_num_kv_heads,
+            bias=bias,
+            quant_config=quant_config,
+            prefix=add_prefix("qkv_proj", prefix),
+            tp_rank=attn_tp_rank,
+            tp_size=attn_tp_size,
+        )
+
+        self.o_proj = RowParallelLinear(
+            input_size=self.total_num_heads * self.head_dim,
+            output_size=hidden_size,
+            bias=bias_o_proj,
+            quant_config=quant_config,
+            prefix=add_prefix("o_proj", prefix),
+            tp_rank=attn_tp_rank,
+            tp_size=attn_tp_size,
+        )
+
+        is_neox_style = True
+        if quant_config is not None and quant_config.get_name() == "gguf":
+            is_neox_style = False
+
+        interleaved_sliding_window = get_attention_sliding_window_size(config)
+        self.sliding_window_pattern = getattr(config, "sliding_window_pattern", None)
+
+        self.is_sliding = False
+        if self.sliding_window_pattern:
+            if (layer_id + 1) % len(self.sliding_window_pattern) != 0:
+                self.is_sliding = True
+
+        self.rotary_emb = get_rope(
+            self.head_dim,
+            rotary_dim=self.head_dim,
+            max_position=max_position_embeddings,
+            base=rope_theta,
+            rope_scaling=rope_scaling,
+            is_neox_style=is_neox_style,
+        )
+        self.attn = RadixAttention(
+            self.num_heads,
+            self.head_dim,
+            self.scaling,
+            num_kv_heads=self.num_kv_heads,
+            layer_id=layer_id,
+            sliding_window_size=(
+                interleaved_sliding_window if self.is_sliding else None
+            ),
+            quant_config=quant_config,
+            prefix=add_prefix("attn", prefix),
+        )
+
+        self.q_norm = RMSNorm(self.head_dim, eps=rms_norm_eps)
+        self.k_norm = RMSNorm(self.head_dim, eps=rms_norm_eps)
+
+    def forward(
+        self,
+        positions: torch.Tensor,
+        hidden_states: torch.Tensor,
+        forward_batch: ForwardBatch,
+    ) -> torch.Tensor:
+        qkv, _ = self.qkv_proj(hidden_states)
+        q, k, v = qkv.split([self.q_size, self.kv_size, self.kv_size], dim=-1)
+
+        # Add qk-norm
+        q_shape = q.shape
+        q = q.reshape(-1, self.head_dim)
+        q = self.q_norm(q)
+        q = q.reshape(q_shape)
+
+        k_shape = k.shape
+        k = k.reshape(-1, self.head_dim)
+        k = self.k_norm(k)
+        k = k.reshape(k_shape)
+
+        if not self.sliding_window_pattern or self.is_sliding:
+            q, k = self.rotary_emb(positions, q, k)
+        attn_output = self.attn(q, k, v, forward_batch)
+        output, _ = self.o_proj(attn_output)
+        return output
+
+
+class Exaone4DecoderLayer(nn.Module):
+    def __init__(
+        self,
+        config: Exaone4Config,
+        layer_id: int = 0,
+        quant_config: Optional[QuantizationConfig] = None,
+        prefix: str = "",
+    ) -> None:
+        super().__init__()
+        self.layer_id = layer_id
+        self.hidden_size = config.hidden_size
+
+        rope_theta = getattr(config, "rope_theta", 1000000)
+        rope_scaling = getattr(config, "rope_scaling", None)
+        if rope_scaling is not None and getattr(
+            config, "original_max_position_embeddings", None
+        ):
+            rope_scaling["original_max_position_embeddings"] = (
+                config.original_max_position_embeddings
+            )
+
+        max_position_embeddings = getattr(config, "max_position_embeddings", 8192)
+
+        self.attn_tp_size = get_parallel().attn_tp_size
+        self.attn_tp_rank = get_parallel().attn_tp_rank
+
+        self.self_attn = Exaone4Attention(
+            config=config,
+            hidden_size=self.hidden_size,
+            num_heads=config.num_attention_heads,
+            num_kv_heads=getattr(
+                config, "num_key_value_heads", config.num_key_value_heads
+            ),
+            layer_id=layer_id,
+            rope_theta=rope_theta,
+            rope_scaling=rope_scaling,
+            max_position_embeddings=max_position_embeddings,
+            quant_config=quant_config,
+            prefix=add_prefix("self_attn", prefix),
+        )
+        self.mlp = Exaone4GatedMLP(
+            hidden_size=self.hidden_size,
+            intermediate_size=config.intermediate_size,
+            hidden_act=config.hidden_act,
+            quant_config=quant_config,
+            prefix=add_prefix("mlp", prefix),
+        )
+        self.post_attention_layernorm = RMSNorm(
+            self.hidden_size, eps=config.rms_norm_eps
+        )
+        self.post_feedforward_layernorm = RMSNorm(
+            self.hidden_size, eps=config.rms_norm_eps
+        )
+
+    def forward(
+        self,
+        positions: torch.Tensor,
+        hidden_states: torch.Tensor,
+        forward_batch: ForwardBatch,
+        residual: Optional[torch.Tensor],
+    ) -> tuple[torch.Tensor, torch.Tensor]:
+
+        if residual is None:
+            residual = hidden_states
+
+        # Self Attention
+        hidden_states = self.self_attn(
+            positions=positions,
+            hidden_states=hidden_states,
+            forward_batch=forward_batch,
+        )
+
+        # Use post-LN
+        hidden_states = self.post_attention_layernorm(hidden_states)
+        hidden_states = hidden_states + residual
+        residual = hidden_states
+
+        # Fully Connected
+        hidden_states = self.mlp(hidden_states)
+
+        # Use post-LN
+        hidden_states = self.post_feedforward_layernorm(hidden_states)
+        hidden_states = hidden_states + residual
+        residual = hidden_states
+
+        return hidden_states, residual
+
+
+class Exaone4Model(nn.Module):
+    def __init__(
+        self,
+        config,
+        quant_config: Optional[QuantizationConfig] = None,
+        prefix: str = "",
+    ):
+        super().__init__()
+        self.config = config
+        self.quant_config = quant_config
+        self.vocab_size = config.vocab_size
+        self.pp_group = get_pp_group()
+        if self.pp_group.is_first_rank:
+            self.embed_tokens = VocabParallelEmbedding(
+                config.vocab_size,
+                config.hidden_size,
+                quant_config=quant_config,
+                prefix=add_prefix("embed_tokens", prefix),
+            )
+        else:
+            self.embed_tokens = PPMissingLayer()
+
+        self.layers, self.start_layer, self.end_layer = make_layers(
+            config.num_hidden_layers,
+            lambda idx, prefix: Exaone4DecoderLayer(
+                config=config,
+                quant_config=quant_config,
+                layer_id=idx,
+                prefix=prefix,
+            ),
+            pp_rank=self.pp_group.rank_in_group,
+            pp_size=self.pp_group.world_size,
+            prefix=add_prefix("layers", prefix),
+        )
+        if self.pp_group.is_last_rank:
+            self.norm = RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        else:
+            self.norm = PPMissingLayer(return_tuple=True)
+
+    def get_input_embeddings(self, input_ids: torch.Tensor) -> torch.Tensor:
+        return self.embed_tokens(input_ids)
+
+    def forward(
+        self,
+        input_ids: torch.Tensor,
+        positions: torch.Tensor,
+        forward_batch: ForwardBatch,
+        input_embeds: Optional[torch.Tensor] = None,
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
+    ) -> Union[torch.Tensor, Tuple[torch.Tensor, List[torch.Tensor]], PPProxyTensors]:
+        if self.pp_group.is_first_rank:
+            if input_embeds is None:
+                hidden_states = self.get_input_embeddings(input_ids)
+            else:
+                hidden_states = input_embeds
+            residual = None
+        else:
+            assert pp_proxy_tensors is not None
+            hidden_states = pp_proxy_tensors["hidden_states"]
+            residual = pp_proxy_tensors["residual"]
+
+        for i in range(len(self.layers)):
+            layer = self.layers[i]
+            hidden_states, residual = layer(
+                positions,
+                hidden_states,
+                forward_batch,
+                residual,
+            )
+        if not self.pp_group.is_last_rank:
+            return PPProxyTensors(
+                {
+                    "hidden_states": hidden_states,
+                    "residual": residual,
+                }
+            )
+        else:
+            hidden_states = self.norm(hidden_states)
+        return hidden_states
+
+
+class Exaone4ForCausalLM(nn.Module):
+    _tied_weights_keys = ["lm_head.weight"]
+    _tp_plan = {"lm_head": "colwise_rep"}
+    _pp_plan = {"lm_head": (["hidden_states"], ["logits"])}
+    base_model_prefix = "language_model"
+
+    # BitandBytes specific attributes
+    default_bitsandbytes_target_modules = [
+        ".gate_proj.",
+        ".down_proj.",
+        ".up_proj.",
+        ".q_proj.",
+        ".k_proj.",
+        ".v_proj.",
+        ".o_proj.",
+    ]
+    bitsandbytes_stacked_params_mapping = {
+        ".q_proj": (".qkv_proj", 0),
+        ".k_proj": (".qkv_proj", 1),
+        ".v_proj": (".qkv_proj", 2),
+        ".gate_proj": (".gate_up_proj", 0),
+        ".up_proj": (".gate_up_proj", 1),
+    }
+
+    packed_modules_mapping = {
+        "qkv_proj": [
+            "q_proj",
+            "k_proj",
+            "v_proj",
+        ],
+        "gate_up_proj": [
+            "gate_proj",
+            "up_proj",
+        ],
+    }
+
+    def __init__(
+        self,
+        config,
+        quant_config: Optional[QuantizationConfig] = None,
+        prefix: str = "",
+    ):
+        super().__init__()
+        self.pp_group = get_pp_group()
+        self.config = config
+        self.quant_config = quant_config
+
+        self.model = self._init_model(config, quant_config, add_prefix("model", prefix))
+        # Exaone-4.0 32B set tie_word_embeddins to False
+        # Exaone-4.0 1.2B set tie_word_embeddins to True
+        if config.tie_word_embeddings:
+            self.lm_head = self.model.embed_tokens
+        else:
+            self.lm_head = ParallelLMHead(
+                config.vocab_size,
+                config.hidden_size,
+                quant_config=quant_config,
+                prefix=add_prefix("lm_head", prefix),
+                use_attn_tp_group=get_server_args().enable_dp_lm_head,
+            )
+
+        self.logits_processor = LogitsProcessor(config)
+        self.pooler = Pooler(pooling_type=PoolingType.LAST, normalize=True)
+
+    def _init_model(
+        self,
+        config,
+        quant_config: Optional[QuantizationConfig] = None,
+        prefix: str = "",
+    ):
+        return Exaone4Model(config, quant_config=quant_config, prefix=prefix)
+
+    def get_input_embeddings(self) -> nn.Embedding:
+        return self.model.embed_tokens
+
+    @torch.no_grad()
+    def forward(
+        self,
+        input_ids: torch.Tensor,
+        positions: torch.Tensor,
+        forward_batch: ForwardBatch,
+        input_embeds: Optional[torch.Tensor] = None,
+        get_embedding: bool = False,
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
+    ) -> LogitsProcessorOutput:
+        hidden_states = self.model(
+            input_ids,
+            positions,
+            forward_batch,
+            input_embeds,
+            pp_proxy_tensors=pp_proxy_tensors,
+        )
+
+        if self.pp_group.is_last_rank:
+            if not get_embedding:
+                return self.logits_processor(
+                    input_ids,
+                    hidden_states,
+                    self.lm_head,
+                    forward_batch,
+                )
+            else:
+                return self.pooler(hidden_states, forward_batch)
+        else:
+            return hidden_states
+
+    @torch.no_grad()
+    def forward_split_prefill(
+        self,
+        input_ids: torch.Tensor,
+        positions: torch.Tensor,
+        forward_batch: ForwardBatch,
+        split_interval: Tuple[int, int],  # [start, end) 0-based
+        input_embeds: torch.Tensor = None,
+    ):
+        start, end = split_interval
+        # embed
+        if start == 0:
+            if input_embeds is None:
+                forward_batch.hidden_states = self.model.embed_tokens(input_ids)
+            else:
+                forward_batch.hidden_states = input_embeds
+        # decoder layer
+        for i in range(start, end):
+            layer = self.model.layers[i]
+            forward_batch.hidden_states, forward_batch.residual = layer(
+                positions,
+                forward_batch.hidden_states,
+                forward_batch,
+                forward_batch.residual,
+            )
+
+        if end == self.model.config.num_hidden_layers:
+            # norm
+            hidden_states, _ = self.model.norm(
+                forward_batch.hidden_states, forward_batch.residual
+            )
+            forward_batch.hidden_states = hidden_states
+            # logits process
+            result = self.logits_processor(
+                input_ids, forward_batch.hidden_states, self.lm_head, forward_batch
+            )
+        else:
+            result = None
+
+        return result
+
+    @property
+    def start_layer(self):
+        return self.model.start_layer
+
+    @property
+    def end_layer(self):
+        return self.model.end_layer
+
+    def get_attention_sliding_window_size(self):
+        return get_attention_sliding_window_size(self.config)
+
+    def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
+        stacked_params_mapping = [
+            # (param_name, shard_name, shard_id)
+            (".qkv_proj", ".q_proj", "q"),
+            (".qkv_proj", ".k_proj", "k"),
+            (".qkv_proj", ".v_proj", "v"),
+            (".gate_up_proj", ".gate_proj", 0),
+            (".gate_up_proj", ".up_proj", 1),
+        ]
+
+        params_dict = dict(self.named_parameters())
+
+        for name, loaded_weight in weights:
+            layer_id = get_layer_id(name)
+            if (
+                layer_id is not None
+                and hasattr(self.model, "start_layer")
+                and (
+                    layer_id < self.model.start_layer
+                    or layer_id >= self.model.end_layer
+                )
+            ):
+                continue
+            if "rotary_emb.inv_freq" in name or "projector" in name:
+                continue
+            if "rotary_emb.cos_cached" in name or "rotary_emb.sin_cached" in name:
+                # Models trained using ColossalAI may include these tensors in
+                # the checkpoint. Skip them.
+                continue
+            if name.startswith("model.vision_tower") and name not in params_dict:
+                continue
+            if self.config.tie_word_embeddings and "lm_head.weight" in name:
+                continue
+            # Handle FP8 kv-scale remapping
+            if "scale" in name:
+                name = maybe_remap_kv_scale_name(name, params_dict)
+                if name is None:
+                    continue
+
+            for param_name, weight_name, shard_id in stacked_params_mapping:
+                if weight_name not in name:
+                    continue
+                name = name.replace(weight_name, param_name)
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                if name not in params_dict:
+                    continue
+                param = params_dict[name]
+                weight_loader = param.weight_loader
+                weight_loader(param, loaded_weight, shard_id)
+                break
+            else:
+                # Skip loading extra bias for GPTQ models.
+                if name.endswith(".bias") and name not in params_dict:
+                    continue
+                # Skip loading kv_scale from ckpts towards new design.
+                if name.endswith(".kv_scale") and name not in params_dict:
+                    continue
+                if name in params_dict.keys():
+                    param = params_dict[name]
+                    weight_loader = getattr(
+                        param, "weight_loader", default_weight_loader
+                    )
+                    weight_loader(param, loaded_weight)
+                else:
+                    logger.warning(f"Parameter {name} not found in params_dict")
+
+    def get_weights_by_name(
+        self, name: str, truncate_size: int = 100, tp_size: int = 1
+    ) -> Optional[torch.Tensor]:
+        """Get the weights of the parameter by its name. Similar to `get_parameter` in Hugging Face.
+
+        Only used for unit test with an unoptimized performance.
+        For optimized performance, please use torch.save and torch.load.
+        """
+        try:
+            if name == "lm_head.weight" and self.config.tie_word_embeddings:
+                logger.info(
+                    "word embedding is tied for this model, return embed_tokens.weight as lm_head.weight."
+                )
+                return (
+                    self.model.embed_tokens.weight.cpu()
+                    .to(torch.float32)
+                    .numpy()
+                    .tolist()[:truncate_size]
+                )
+
+            mapped_name = name
+            mapped_shard_id = None
+            for param_name, weight_name, shard_id in self.stacked_params_mapping:
+                if weight_name in name:
+                    mapped_name = name.replace(weight_name, param_name)
+                    mapped_shard_id = shard_id
+                    break
+            params_dict = dict(self.named_parameters())
+            param = params_dict[mapped_name]
+            if mapped_shard_id is not None:
+                if mapped_shard_id in ["q", "k", "v"]:
+                    num_heads = self.config.num_attention_heads // tp_size
+                    num_kv_heads = self.config.num_key_value_heads // tp_size
+                    head_dim = (
+                        self.config.hidden_size // self.config.num_attention_heads
+                    )
+                    if mapped_shard_id == "q":
+                        offset = 0
+                        size = num_heads * head_dim
+                    elif mapped_shard_id == "k":
+                        offset = num_heads * head_dim
+                        size = num_kv_heads * head_dim
+                    elif mapped_shard_id == "v":
+                        offset = (num_heads + num_kv_heads) * head_dim
+                        size = num_kv_heads * head_dim
+                    weight = param.data.narrow(0, offset, size)
+                elif mapped_shard_id in [0, 1]:
+                    intermediate_size = self.config.intermediate_size
+                    slice_size = intermediate_size // tp_size
+                    if mapped_shard_id == 0:  # gate_proj
+                        offset = 0
+                        size = slice_size
+                    elif mapped_shard_id == 1:  # up_proj
+                        offset = slice_size
+                        size = slice_size
+
+                    weight = param.data.narrow(0, offset, size)
+                else:
+                    weight = param.data
+            else:
+                weight = param.data
+            if tp_size > 1 and ("o_proj" in name or "down_proj" in name):
+                gathered_weights = [torch.zeros_like(weight) for _ in range(tp_size)]
+                torch.distributed.all_gather(gathered_weights, weight)
+                weight = torch.cat(gathered_weights, dim=1)
+            return weight.cpu().to(torch.float32).numpy().tolist()[:truncate_size]
+
+        except Exception:
+            logger.error(
+                f"Error getting weights by name {name} in Exaone4ForCausalLM: {get_exception_traceback()}"
+            )
+            return None
+
+    def get_embed_and_head(self):
+        return self.model.embed_tokens.weight, self.lm_head.weight
+
+    def set_embed_and_head(self, embed, head):
+        del self.model.embed_tokens.weight
+        del self.lm_head.weight
+        self.model.embed_tokens.weight = embed
+        self.lm_head.weight = head
+        torch.cuda.empty_cache()
+        torch.cuda.synchronize()
+
+    def get_embed(self):
+        return self.model.embed_tokens.weight
+
+    def set_embed(self, embed):
+        # NOTE: If draft hidden size != target hidden size, the embed weight cannot be shared for EAGLE3
+        if (
+            hasattr(self.config, "target_hidden_size")
+            and self.config.target_hidden_size != self.config.hidden_size
+        ):
+            return
+        del self.model.embed_tokens.weight
+        self.model.embed_tokens.weight = embed
+        torch.cuda.empty_cache()
+        torch.cuda.synchronize()
+
+    def load_kv_cache_scales(self, quantization_param_path: str) -> None:
+        self.model.load_kv_cache_scales(quantization_param_path)
+
+
+EntryClass = Exaone4ForCausalLM