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[Models] Fuse Qwen3.5 GDN's qkvz_proj and ba_proj (#34492)

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Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>
This commit is contained in:
Isotr0py
2026-02-16 23:32:51 +08:00
committed by GitHub
parent 08f8c198ae
commit 3bb4e4311c
3 changed files with 87 additions and 182 deletions
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198
vllm/model_executor/models/qwen3_5.py
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@@ -30,36 +30,20 @@ from collections.abc import Callable, Iterable
import torch
from einops import rearrange
from torch import nn
from transformers.activations import ACT2FN
from vllm.compilation.decorators import support_torch_compile
from vllm.config import (
CacheConfig,
ModelConfig,
SpeculativeConfig,
VllmConfig,
get_current_vllm_config,
)
from vllm.distributed import (
divide,
get_pp_group,
get_tensor_model_parallel_rank,
get_tensor_model_parallel_world_size,
)
from vllm.logger import init_logger
from vllm.model_executor.layers.layernorm import (
GemmaRMSNorm as Qwen3_5RMSNorm,
)
from vllm.model_executor.layers.layernorm import RMSNormGated
from vllm.model_executor.layers.linear import (
ColumnParallelLinear,
MergedColumnParallelLinear,
RowParallelLinear,
)
from vllm.model_executor.layers.linear import MergedColumnParallelLinear
from vllm.model_executor.layers.logits_processor import LogitsProcessor
from vllm.model_executor.layers.mamba.mamba_mixer2 import (
mamba_v2_sharded_weight_loader,
)
from vllm.model_executor.layers.mamba.mamba_utils import (
MambaStateCopyFunc,
MambaStateCopyFuncCalculator,
@@ -73,11 +57,8 @@ from vllm.model_executor.layers.vocab_parallel_embedding import (
)
from vllm.model_executor.model_loader.weight_utils import (
default_weight_loader,
sharded_weight_loader,
)
from vllm.model_executor.utils import set_weight_attrs
from vllm.multimodal import MULTIMODAL_REGISTRY
from vllm.platforms import current_platform
from vllm.sequence import IntermediateTensors
from vllm.transformers_utils.configs.qwen3_5 import (
Qwen3_5Config,
@@ -99,7 +80,6 @@ from .interfaces import (
)
from .qwen2_moe import Qwen2MoeMLP as Qwen3NextMLP
from .qwen3_next import (
ChunkGatedDeltaRule,
Qwen3NextAttention,
Qwen3NextDecoderLayer,
Qwen3NextGatedDeltaNet,
@@ -139,154 +119,31 @@ class Qwen3_5MoeProcessingInfo(Qwen3VLProcessingInfo):
class Qwen3_5GatedDeltaNet(Qwen3NextGatedDeltaNet):
def __init__(
self,
config: Qwen3_5TextConfig | Qwen3_5MoeTextConfig,
model_config: ModelConfig | None = None,
cache_config: CacheConfig | None = None,
quant_config: QuantizationConfig | None = None,
speculative_config: SpeculativeConfig | None = None,
prefix: str = "",
) -> None:
super(Qwen3NextGatedDeltaNet, self).__init__()
self.tp_size = get_tensor_model_parallel_world_size()
self.tp_rank = get_tensor_model_parallel_rank()
self.hidden_size = config.hidden_size
self.num_v_heads = config.linear_num_value_heads
self.num_k_heads = config.linear_num_key_heads
self.head_k_dim = config.linear_key_head_dim
self.head_v_dim = config.linear_value_head_dim
self.key_dim = self.head_k_dim * self.num_k_heads
self.value_dim = self.head_v_dim * self.num_v_heads
self.conv_kernel_size = config.linear_conv_kernel_dim
self.layer_idx = extract_layer_index(prefix)
self.activation = config.hidden_act
self.act = ACT2FN[config.hidden_act]
self.layer_norm_epsilon = config.rms_norm_eps
self.prefix = prefix
self.config = config
self.model_config = model_config
self.cache_config = cache_config
self.quant_config = quant_config
self.speculative_config = speculative_config
self.num_spec = (
self.speculative_config.num_speculative_tokens
if self.speculative_config
else 0
)
# QKV
self.conv_dim = self.key_dim * 2 + self.value_dim
self.conv1d = ColumnParallelLinear(
input_size=self.conv_kernel_size,
output_size=self.conv_dim,
bias=False,
prefix=f"{prefix}.conv1d",
)
self.conv1d.weight.data = self.conv1d.weight.data.unsqueeze(1)
self.in_proj_qkv = MergedColumnParallelLinear(
input_size=self.hidden_size,
output_sizes=[self.key_dim, self.key_dim, self.value_dim],
bias=False,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_qkv",
)
self.in_proj_z = ColumnParallelLinear(
input_size=self.hidden_size,
output_size=self.value_dim,
bias=False,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_z",
)
self.in_proj_b = ColumnParallelLinear(
input_size=self.hidden_size,
output_size=self.num_v_heads,
bias=False,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_b",
)
self.in_proj_a = ColumnParallelLinear(
input_size=self.hidden_size,
output_size=self.num_v_heads,
bias=False,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_a",
)
query_key_settings = (self.key_dim, 0, False)
value_settings = (self.value_dim, 0, False)
delattr(self.conv1d.weight, "weight_loader")
set_weight_attrs(
self.conv1d.weight,
{
"weight_loader": mamba_v2_sharded_weight_loader(
[
query_key_settings,
query_key_settings,
value_settings,
],
self.tp_size,
self.tp_rank,
)
},
)
# selective projection used to make dt, B and C input dependant
# time step projection (discretization)
# instantiate once and copy inv_dt in init_weights of PretrainedModel
self.dt_bias = nn.Parameter(
torch.ones(self.num_v_heads // self.tp_size),
)
self.A_log = nn.Parameter(
torch.empty(
divide(self.num_v_heads, self.tp_size),
)
)
set_weight_attrs(self.A_log, {"weight_loader": sharded_weight_loader(0)})
set_weight_attrs(self.dt_bias, {"weight_loader": sharded_weight_loader(0)})
self.norm = RMSNormGated(
self.head_v_dim,
eps=self.layer_norm_epsilon,
group_size=None,
norm_before_gate=True,
device=current_platform.current_device(),
dtype=config.dtype,
)
self.out_proj = RowParallelLinear(
self.value_dim,
self.hidden_size,
bias=False,
input_is_parallel=True,
quant_config=quant_config,
prefix=f"{prefix}.out_proj",
)
self.chunk_gated_delta_rule = ChunkGatedDeltaRule()
compilation_config = get_current_vllm_config().compilation_config
if prefix in compilation_config.static_forward_context:
raise ValueError(f"Duplicate layer name: {prefix}")
compilation_config.static_forward_context[prefix] = self
def fix_query_key_value_ordering(
self,
mixed_qkv,
z,
b,
a,
mixed_qkvz: torch.Tensor,
mixed_ba: torch.Tensor,
):
raise NotImplementedError(
"Qwen3.5 Series dont need to fix query key value ordering"
)
def create_qkvz_proj(
self,
hidden_size: int,
key_dim: int,
value_dim: int,
quant_config: QuantizationConfig | None,
prefix: str,
) -> MergedColumnParallelLinear:
return MergedColumnParallelLinear(
input_size=hidden_size,
output_sizes=[key_dim, key_dim, value_dim, value_dim],
bias=False,
quant_config=quant_config,
prefix=prefix,
)
def forward(
self,
hidden_states: torch.Tensor,
@@ -303,11 +160,13 @@ class Qwen3_5GatedDeltaNet(Qwen3NextGatedDeltaNet):
# ============================================================
# Part 1: Input Projection
# ============================================================
mixed_qkv, _ = self.in_proj_qkv(hidden_states)
z, _ = self.in_proj_z(hidden_states)
mixed_qkvz, _ = self.in_proj_qkvz(hidden_states)
qkv_size = (self.key_dim * 2 + self.value_dim) // self.tp_size
z_size = self.value_dim // self.tp_size
mixed_qkv, z = mixed_qkvz.split([qkv_size, z_size], dim=-1)
z = z.reshape(z.size(0), -1, self.head_v_dim)
b, _ = self.in_proj_b(hidden_states)
a, _ = self.in_proj_a(hidden_states)
ba, _ = self.in_proj_ba(hidden_states)
b, a = ba.chunk(2, dim=-1)
b = b.contiguous()
a = a.contiguous()
@@ -506,11 +365,18 @@ class Qwen3_5Model(Qwen3NextModel):
def load_weights(self, weights: Iterable[tuple[str, torch.Tensor]]) -> set[str]:
stacked_params_mapping = [
# (param_name, shard_name, shard_id)
# self attention
("qkv_proj", "q_proj", "q"),
("qkv_proj", "k_proj", "k"),
("qkv_proj", "v_proj", "v"),
# mlp
("gate_up_proj", "gate_proj", 0),
("gate_up_proj", "up_proj", 1),
# GDN
("in_proj_qkvz", "in_proj_qkv", (0, 1, 2)),
("in_proj_qkvz", "in_proj_z", 3),
("in_proj_ba", "in_proj_b", 0),
("in_proj_ba", "in_proj_a", 1),
]
params_dict = dict(self.named_parameters())

37
vllm/model_executor/models/qwen3_next.py
View File

@@ -44,6 +44,7 @@ from vllm.model_executor.layers.layernorm import (
from vllm.model_executor.layers.layernorm import RMSNormGated
from vllm.model_executor.layers.linear import (
ColumnParallelLinear,
MergedColumnParallelLinear,
QKVParallelLinear,
ReplicatedLinear,
RowParallelLinear,
@@ -406,19 +407,19 @@ class Qwen3NextGatedDeltaNet(nn.Module, MambaBase):
self.conv1d.weight.data = self.conv1d.weight.data.unsqueeze(1)
# projection of the input hidden states
self.projection_size_qkvz = self.key_dim * 2 + self.value_dim * 2
self.projection_size_ba = self.num_v_heads * 2
self.in_proj_qkvz = ColumnParallelLinear(
input_size=self.hidden_size,
output_size=self.projection_size_qkvz,
bias=False,
# Qwen3-Next and Qwen3.5 has a different qkv_proj layout,
# we need to create qkvz_proj adaptively here.
self.in_proj_qkvz = self.create_qkvz_proj(
hidden_size=self.hidden_size,
key_dim=self.key_dim,
value_dim=self.value_dim,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_qkvz",
)
# ba_proj doesn't support blockwise fp8 quantization.
self.in_proj_ba = ColumnParallelLinear(
self.in_proj_ba = MergedColumnParallelLinear(
input_size=self.hidden_size,
output_size=self.projection_size_ba,
output_sizes=[self.num_v_heads] * 2,
bias=False,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_ba",
@@ -484,10 +485,26 @@ class Qwen3NextGatedDeltaNet(nn.Module, MambaBase):
raise ValueError(f"Duplicate layer name: {prefix}")
compilation_config.static_forward_context[prefix] = self
def create_qkvz_proj(
self,
hidden_size: int,
key_dim: int,
value_dim: int,
quant_config: QuantizationConfig | None,
prefix: str,
) -> MergedColumnParallelLinear:
return MergedColumnParallelLinear(
input_size=hidden_size,
output_sizes=[sum((key_dim, key_dim, value_dim)), value_dim],
bias=False,
quant_config=quant_config,
prefix=f"{prefix}.in_proj_qkvz",
)
def fix_query_key_value_ordering(
self,
mixed_qkvz,
mixed_ba,
mixed_qkvz: torch.Tensor,
mixed_ba: torch.Tensor,
):
"""
Derives `query`, `key` and `value` tensors from `mixed_qkvzba`.