Add pipeline parallelism for Qwen2 and Qwen3 Model (#6250)

python/sglang/srt/models/qwen2.py

@@ -15,12 +15,14 @@
 # Adapted from llama2.py
 # Modify details for the adaptation of Qwen2 model.
 """Inference-only Qwen2 model compatible with HuggingFace weights."""
-from typing import Any, Dict, Iterable, Optional, Tuple
+import logging
+from typing import Any, Dict, Iterable, Optional, Tuple, Union
 
 import torch
 from torch import nn
 
 from sglang.srt.distributed import (
+    get_pp_group,
     get_tensor_model_parallel_rank,
     get_tensor_model_parallel_world_size,
 )
@@ -36,11 +38,12 @@ 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
+from sglang.srt.model_executor.forward_batch_info import ForwardBatch, PPProxyTensors
 from sglang.srt.model_loader.weight_utils import (
     default_weight_loader,
     kv_cache_scales_loader,
@@ -50,6 +53,9 @@ from sglang.srt.utils import add_prefix, make_layers
 Qwen2Config = None
 
 
+logger = logging.getLogger(__name__)
+
+
 class Qwen2MLP(nn.Module):
     def __init__(
         self,
@@ -245,15 +251,21 @@ class Qwen2Model(nn.Module):
         self.config = config
         self.padding_idx = config.pad_token_id
         self.vocab_size = config.vocab_size
-        self.embed_tokens = VocabParallelEmbedding(
-            config.vocab_size,
-            config.hidden_size,
-            quant_config=quant_config,
-            prefix=add_prefix("embed_tokens", prefix),
-        )
+        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()
+
         # Use the provided decoder layer type or default to Qwen2DecoderLayer
         decoder_layer_type = decoder_layer_type or Qwen2DecoderLayer
-        self.layers = make_layers(
+        self.layers, self.start_layer, self.end_layer = make_layers(
             config.num_hidden_layers,
             lambda idx, prefix: decoder_layer_type(
                 layer_id=idx,
@@ -261,9 +273,14 @@ class Qwen2Model(nn.Module):
                 quant_config=quant_config,
                 prefix=prefix,
             ),
+            pp_rank=self.pp_group.rank_in_group,
+            pp_size=self.pp_group.world_size,
             prefix=add_prefix("layers", prefix),
         )
-        self.norm = RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        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_embedding(self, input_ids: torch.Tensor) -> torch.Tensor:
         if hasattr(self.config, "scale_emb"):
@@ -280,13 +297,20 @@ class Qwen2Model(nn.Module):
         positions: torch.Tensor,
         forward_batch: ForwardBatch,
         input_embeds: torch.Tensor = None,
-    ) -> torch.Tensor:
-        if input_embeds is None:
-            hidden_states = self.embed_tokens(input_ids)
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
+    ) -> Union[torch.Tensor, PPProxyTensors]:
+        if self.pp_group.is_first_rank:
+            if input_embeds is None:
+                hidden_states = self.embed_tokens(input_ids)
+            else:
+                hidden_states = input_embeds
+            residual = None
         else:
-            hidden_states = input_embeds
-        residual = None
-        for i in range(len(self.layers)):
+            assert pp_proxy_tensors is not None
+            hidden_states = pp_proxy_tensors["hidden_states"]
+            residual = pp_proxy_tensors["residual"]
+
+        for i in range(self.start_layer, self.end_layer):
             layer = self.layers[i]
             hidden_states, residual = layer(
                 positions,
@@ -294,7 +318,15 @@ class Qwen2Model(nn.Module):
                 forward_batch,
                 residual,
             )
-        hidden_states, _ = self.norm(hidden_states, residual)
+        if not self.pp_group.is_last_rank:
+            return PPProxyTensors(
+                {
+                    "hidden_states": hidden_states,
+                    "residual": residual,
+                }
+            )
+        else:
+            hidden_states, _ = self.norm(hidden_states, residual)
         return hidden_states
 
     # If this function is called, it should always initialize KV cache scale
@@ -348,6 +380,7 @@ class Qwen2ForCausalLM(nn.Module):
         prefix: str = "",
     ) -> None:
         super().__init__()
+        self.pp_group = get_pp_group()
         self.config = config
         self.quant_config = quant_config
         self.model = Qwen2Model(
@@ -379,14 +412,33 @@ class Qwen2ForCausalLM(nn.Module):
         forward_batch: ForwardBatch,
         input_embeds: torch.Tensor = None,
         get_embedding: bool = False,
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
     ) -> torch.Tensor:
-        hidden_states = self.model(input_ids, positions, forward_batch, input_embeds)
-        if not get_embedding:
-            return self.logits_processor(
-                input_ids, hidden_states, self.lm_head, forward_batch
-            )
+        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 self.pooler(hidden_states, forward_batch)
+            return hidden_states
+
+    @property
+    def start_layer(self):
+        return self.model.start_layer
+
+    @property
+    def end_layer(self):
+        return self.model.end_layer
 
     def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
         stacked_params_mapping = [
@@ -400,6 +452,17 @@ class Qwen2ForCausalLM(nn.Module):
 
         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:
@@ -426,9 +489,15 @@ class Qwen2ForCausalLM(nn.Module):
                 # Skip loading extra bias for GPTQ models.
                 if name.endswith(".bias") and name not in params_dict:
                     continue
-                param = params_dict[name]
-                weight_loader = getattr(param, "weight_loader", default_weight_loader)
-                weight_loader(param, loaded_weight)
+
+                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_embed_and_head(self):
         return self.model.embed_tokens.weight, self.lm_head.weight

python/sglang/srt/models/qwen2_moe.py

@@ -16,9 +16,10 @@
 # https://github.com/vllm-project/vllm/blob/main/vllm/model_executor/models/qwen2_moe.py
 """Inference-only Qwen2MoE model compatible with HuggingFace weights."""
 
+import logging
 from dataclasses import dataclass
 from enum import Enum, auto
-from typing import Any, Dict, Iterable, Optional, Tuple
+from typing import Any, Dict, Iterable, Optional, Tuple, Union
 
 import torch
 import torch.nn.functional as F
@@ -26,6 +27,7 @@ from torch import nn
 from transformers import PretrainedConfig
 
 from sglang.srt.distributed import (
+    get_pp_group,
     get_tensor_model_parallel_world_size,
     tensor_model_parallel_all_reduce,
 )
@@ -52,18 +54,21 @@ from sglang.srt.layers.moe.fused_moe_triton import FusedMoE
 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.managers.expert_distribution import ExpertDistributionRecorder
 from sglang.srt.managers.schedule_batch import global_server_args_dict
-from sglang.srt.model_executor.forward_batch_info import ForwardBatch
+from sglang.srt.model_executor.forward_batch_info import ForwardBatch, PPProxyTensors
 from sglang.srt.model_loader.weight_utils import default_weight_loader
 from sglang.srt.utils import add_prefix, make_layers
 
 expert_distribution_recorder = ExpertDistributionRecorder()
 
+logger = logging.getLogger(__name__)
+
 
 class Qwen2MoeMLP(nn.Module):
     def __init__(
@@ -535,16 +540,21 @@ class Qwen2MoeModel(nn.Module):
         super().__init__()
         self.padding_idx = config.pad_token_id
         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,
+                enable_tp=not global_server_args_dict["enable_dp_attention"],
+                prefix=add_prefix("embed_tokens", prefix),
+            )
+        else:
+            self.embed_tokens = PPMissingLayer()
 
-        self.embed_tokens = VocabParallelEmbedding(
-            config.vocab_size,
-            config.hidden_size,
-            enable_tp=not global_server_args_dict["enable_dp_attention"],
-            prefix=add_prefix("embed_tokens", prefix),
-        )
         # Use the provided decoder layer type or default to Qwen2MoeDecoderLayer
         decoder_layer_type = decoder_layer_type or Qwen2MoeDecoderLayer
-        self.layers = make_layers(
+        self.layers, self.start_layer, self.end_layer = make_layers(
             config.num_hidden_layers,
             lambda idx, prefix: decoder_layer_type(
                 layer_id=idx,
@@ -552,9 +562,14 @@ class Qwen2MoeModel(nn.Module):
                 quant_config=quant_config,
                 prefix=prefix,
             ),
+            pp_rank=self.pp_group.rank_in_group,
+            pp_size=self.pp_group.world_size,
             prefix=add_prefix("layers", prefix),
         )
-        self.norm = RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        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 forward(
         self,
@@ -562,20 +577,35 @@ class Qwen2MoeModel(nn.Module):
         positions: torch.Tensor,
         forward_batch: ForwardBatch,
         input_embeds: torch.Tensor = None,
-    ) -> torch.Tensor:
-        if input_embeds is None:
-            hidden_states = self.embed_tokens(input_ids)
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
+    ) -> Union[torch.Tensor, PPProxyTensors]:
+        if self.pp_group.is_first_rank:
+            if input_embeds is None:
+                hidden_states = self.embed_tokens(input_ids)
+            else:
+                hidden_states = input_embeds
+            residual = None
         else:
-            hidden_states = input_embeds
-        residual = None
-        for i in range(len(self.layers)):
+            assert pp_proxy_tensors is not None
+            hidden_states = pp_proxy_tensors["hidden_states"]
+            residual = pp_proxy_tensors["residual"]
+
+        for i in range(self.start_layer, self.end_layer):
             expert_distribution_recorder.set_current_layer(i)
             layer = self.layers[i]
             hidden_states, residual = layer(
                 positions, hidden_states, forward_batch, residual
             )
-        if hidden_states.shape[0] != 0:
-            hidden_states, _ = self.norm(hidden_states, residual)
+        if not self.pp_group.is_last_rank:
+            return PPProxyTensors(
+                {
+                    "hidden_states": hidden_states,
+                    "residual": residual,
+                }
+            )
+        else:
+            if hidden_states.shape[0] != 0:
+                hidden_states, _ = self.norm(hidden_states, residual)
         return hidden_states
 
 
@@ -589,6 +619,7 @@ class Qwen2MoeForCausalLM(nn.Module):
         prefix: str = "",
     ) -> None:
         super().__init__()
+        self.pp_group = get_pp_group()
         self.config = config
         self.quant_config = quant_config
         self.model = Qwen2MoeModel(
@@ -609,11 +640,29 @@ class Qwen2MoeForCausalLM(nn.Module):
         positions: torch.Tensor,
         forward_batch: ForwardBatch,
         input_embeds: torch.Tensor = None,
-    ) -> LogitsProcessorOutput:
-        hidden_states = self.model(input_ids, positions, forward_batch, input_embeds)
-        return self.logits_processor(
-            input_ids, hidden_states, self.lm_head, forward_batch
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
+    ) -> torch.Tensor:
+        hidden_states = self.model(
+            input_ids,
+            positions,
+            forward_batch,
+            input_embeds,
+            pp_proxy_tensors=pp_proxy_tensors,
         )
+        if self.pp_group.is_last_rank:
+            return self.logits_processor(
+                input_ids, hidden_states, self.lm_head, forward_batch
+            )
+        else:
+            return hidden_states
+
+    @property
+    def start_layer(self):
+        return self.model.start_layer
+
+    @property
+    def end_layer(self):
+        return self.model.end_layer
 
     def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
         stacked_params_mapping = [
@@ -636,6 +685,16 @@ class Qwen2MoeForCausalLM(nn.Module):
 
         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:
                 continue
             for param_name, weight_name, shard_id in stacked_params_mapping:
@@ -684,11 +743,14 @@ class Qwen2MoeForCausalLM(nn.Module):
                     if name not in params_dict:
                         continue
 
-                    param = params_dict[name]
-                    weight_loader = getattr(
-                        param, "weight_loader", default_weight_loader
-                    )
-                    weight_loader(param, loaded_weight)
+                    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")
 
 
 EntryClass = Qwen2MoeForCausalLM

python/sglang/srt/models/qwen3.py

 # Adapted from qwen2.py
 
+import logging
 from functools import partial
 from typing import Any, Dict, Iterable, Optional, Tuple
 
@@ -7,6 +8,7 @@ import torch
 from torch import nn
 
 from sglang.srt.distributed import (
+    get_pp_group,
     get_tensor_model_parallel_rank,
     get_tensor_model_parallel_world_size,
     split_tensor_along_last_dim,
@@ -19,8 +21,9 @@ 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 get_layer_id
 from sglang.srt.layers.vocab_parallel_embedding import ParallelLMHead
-from sglang.srt.model_executor.forward_batch_info import ForwardBatch
+from sglang.srt.model_executor.forward_batch_info import ForwardBatch, PPProxyTensors
 from sglang.srt.model_loader.weight_utils import default_weight_loader
 from sglang.srt.models.qwen2 import Qwen2MLP as Qwen3MLP
 from sglang.srt.models.qwen2 import Qwen2Model
@@ -28,6 +31,8 @@ from sglang.srt.utils import add_prefix
 
 Qwen3Config = None
 
+logger = logging.getLogger(__name__)
+
 
 class Qwen3Attention(nn.Module):
     def __init__(
@@ -238,6 +243,7 @@ class Qwen3ForCausalLM(nn.Module):
         prefix: str = "",
     ) -> None:
         super().__init__()
+        self.pp_group = get_pp_group()
         self.config = config
         self.quant_config = quant_config
         self.model = Qwen3Model(
@@ -266,14 +272,33 @@ class Qwen3ForCausalLM(nn.Module):
         forward_batch: ForwardBatch,
         input_embeds: torch.Tensor = None,
         get_embedding: bool = False,
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
     ) -> torch.Tensor:
-        hidden_states = self.model(input_ids, positions, forward_batch, input_embeds)
-        if not get_embedding:
-            return self.logits_processor(
-                input_ids, hidden_states, self.lm_head, forward_batch
-            )
+        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 self.pooler(hidden_states, forward_batch)
+            return hidden_states
+
+    @property
+    def start_layer(self):
+        return self.model.start_layer
+
+    @property
+    def end_layer(self):
+        return self.model.end_layer
 
     def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
         stacked_params_mapping = [
@@ -287,6 +312,17 @@ class Qwen3ForCausalLM(nn.Module):
 
         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:
@@ -313,9 +349,15 @@ class Qwen3ForCausalLM(nn.Module):
                 # Skip loading extra bias for GPTQ models.
                 if name.endswith(".bias") and name not in params_dict:
                     continue
-                param = params_dict[name]
-                weight_loader = getattr(param, "weight_loader", default_weight_loader)
-                weight_loader(param, loaded_weight)
+
+                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_embed_and_head(self):
         return self.model.embed_tokens.weight, self.lm_head.weight

python/sglang/srt/models/qwen3_moe.py

@@ -17,6 +17,7 @@
 
 """Inference-only Qwen3MoE model compatible with HuggingFace weights."""
 
+import logging
 from dataclasses import dataclass
 from enum import Enum, auto
 from functools import partial
@@ -28,6 +29,7 @@ from torch import nn
 from transformers.configuration_utils import PretrainedConfig
 
 from sglang.srt.distributed import (
+    get_pp_group,
     get_tensor_model_parallel_rank,
     get_tensor_model_parallel_world_size,
     split_tensor_along_last_dim,
@@ -57,12 +59,13 @@ from sglang.srt.layers.moe.fused_moe_triton import FusedMoE
 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 get_layer_id
 from sglang.srt.layers.vocab_parallel_embedding import (
     ParallelLMHead,
     VocabParallelEmbedding,
 )
 from sglang.srt.managers.schedule_batch import global_server_args_dict
-from sglang.srt.model_executor.forward_batch_info import ForwardBatch
+from sglang.srt.model_executor.forward_batch_info import ForwardBatch, PPProxyTensors
 from sglang.srt.model_loader.weight_utils import default_weight_loader
 from sglang.srt.models.qwen2_moe import Qwen2MoeMLP as Qwen3MoeMLP
 from sglang.srt.models.qwen2_moe import Qwen2MoeModel
@@ -70,6 +73,8 @@ from sglang.srt.utils import add_prefix
 
 Qwen3MoeConfig = None
 
+logger = logging.getLogger(__name__)
+
 
 class Qwen3MoeSparseMoeBlock(nn.Module):
     def __init__(
@@ -516,6 +521,7 @@ class Qwen3MoeForCausalLM(nn.Module):
         prefix: str = "",
     ) -> None:
         super().__init__()
+        self.pp_group = get_pp_group()
         self.config = config
         self.quant_config = quant_config
         self.model = Qwen3MoeModel(
@@ -536,12 +542,31 @@ class Qwen3MoeForCausalLM(nn.Module):
         positions: torch.Tensor,
         forward_batch: ForwardBatch,
         input_embeds: torch.Tensor = None,
-    ) -> LogitsProcessorOutput:
-        hidden_states = self.model(input_ids, positions, forward_batch, input_embeds)
-        return self.logits_processor(
-            input_ids, hidden_states, self.lm_head, forward_batch
+        pp_proxy_tensors: Optional[PPProxyTensors] = None,
+    ) -> torch.Tensor:
+        hidden_states = self.model(
+            input_ids,
+            positions,
+            forward_batch,
+            input_embeds,
+            pp_proxy_tensors=pp_proxy_tensors,
         )
 
+        if self.pp_group.is_last_rank:
+            return self.logits_processor(
+                input_ids, hidden_states, self.lm_head, forward_batch
+            )
+        else:
+            return hidden_states
+
+    @property
+    def start_layer(self):
+        return self.model.start_layer
+
+    @property
+    def end_layer(self):
+        return self.model.end_layer
+
     def load_weights(self, weights: Iterable[Tuple[str, torch.Tensor]]):
         stacked_params_mapping = [
             # (param_name, shard_name, shard_id)
@@ -563,6 +588,17 @@ class Qwen3MoeForCausalLM(nn.Module):
 
         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:
                 continue
             for param_name, weight_name, shard_id in stacked_params_mapping:
@@ -611,11 +647,14 @@ class Qwen3MoeForCausalLM(nn.Module):
                     if name not in params_dict:
                         continue
 
-                    param = params_dict[name]
-                    weight_loader = getattr(
-                        param, "weight_loader", default_weight_loader
-                    )
-                    weight_loader(param, loaded_weight)
+                    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")
 
 
 EntryClass = Qwen3MoeForCausalLM

test/srt/test_pp_single_node.py

 """
 Usage:
 python3 -m unittest test_pp_single_node.TestPPAccuracy.test_gsm8k
+python3 -m unittest test_pp_single_node.TestQwenPPAccuracy.test_pp_consistency
 python3 -m unittest test_pp_single_node.TestFixedBugs.test_chunked_prefill_with_small_bs
 """
 
@@ -61,6 +62,60 @@ class TestPPAccuracy(unittest.TestCase):
         time.sleep(5)
 
 
+class TestQwenPPAccuracy(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.base_url = "http://127.0.0.1:23334"  # different ports to avoid conflicts
+        cls.model_name = "Qwen/Qwen3-8B"  # replace with your Qwen Model if needed
+
+    def run_gsm8k_test(self, pp_size):
+        process = popen_launch_server(
+            self.model_name,
+            self.base_url,
+            timeout=DEFAULT_TIMEOUT_FOR_SERVER_LAUNCH,
+            other_args=[
+                "--pp-size",
+                pp_size,
+                "--chunked-prefill-size",
+                256,
+            ],
+        )
+
+        try:
+            args = SimpleNamespace(
+                num_shots=5,
+                data_path=None,
+                num_questions=200,
+                max_new_tokens=512,
+                parallel=128,
+                host="http://127.0.0.1",
+                port=int(self.base_url.split(":")[-1]),
+            )
+            metrics = run_eval(args)
+            time.sleep(5)
+            return metrics
+        finally:
+            kill_process_tree(process.pid)
+
+    def test_baseline_accuracy(self):
+        metrics = self.run_gsm8k_test(pp_size=1)
+        print(f"[Qwen Baseline] {metrics=}")
+        self.assertGreater(metrics["accuracy"], 0.74)
+
+    def test_pp_consistency(self):
+        baseline = self.run_gsm8k_test(pp_size=1)
+        pp_metrics = self.run_gsm8k_test(pp_size=2)
+
+        print(f"[Qwen PP Comparison] Baseline: {baseline} | PP: {pp_metrics}")
+
+        self.assertAlmostEqual(
+            pp_metrics["accuracy"],
+            baseline["accuracy"],
+            delta=0.01,
+            msg=f"PP accuracy exceeds 1% (baseline: {baseline['accuracy']}, pp: {pp_metrics['accuracy']})",
+        )
+
+
 class TestFixedBugs(unittest.TestCase):
     def test_chunked_prefill_with_small_bs(self):
         model = DEFAULT_MODEL_NAME_FOR_TEST