[None][feat] Support Qwen3 next

cpp/tensorrt_llm/kernels/fusedQKNormRopeKernel.cu

@@ -312,6 +312,14 @@ void launchFusedQKNormRope(void* qkv, int const num_tokens, int const num_heads_
                 base, position_ids, num_tokens, factor, low, high, attention_factor);
         });
         break;
+    case 256:
+        DISPATCH_INTERLEAVE(interleave, INTERLEAVE, {
+            fusedQKNormRopeKernel<256, INTERLEAVE><<<gridDim, blockDim, 0, stream>>>(
+                reinterpret_cast<__nv_bfloat16*>(qkv), num_heads_q, num_heads_k, num_heads_v, eps,
+                reinterpret_cast<__nv_bfloat16 const*>(q_weight), reinterpret_cast<__nv_bfloat16 const*>(k_weight),
+                base, position_ids, num_tokens, factor, low, high, attention_factor);
+        });
+        break;
     default: TLLM_THROW("Unsupported head dimension for fusedQKNormRope: %d", head_dim);
     }
 }

examples/models/core/qwen/README.md

@@ -21,13 +21,14 @@ This document shows how to build and run a [Qwen](https://huggingface.co/Qwen) m
     - [Quick start](#quick-start)
       - [Run a single inference](#run-a-single-inference)
     - [Evaluation](#evaluation)
-    - [Model Quantization to FP4](#model-quantization-to-fp4)
+    - [Model Quantization](#model-quantization)
     - [Benchmark](#benchmark)
     - [Serving](#serving)
       - [trtllm-serve](#trtllm-serve)
       - [Disaggregated Serving](#disaggregated-serving)
     - [Eagle3](#eagle3)
-  - [Dynamo](#dynamo)
+    - [Dynamo](#dynamo)
+  - [Qwen3-Next](#qwen3-next)
   - [Notes and Troubleshooting](#notes-and-troubleshooting)
   - [Credits](#credits)
 
@@ -926,6 +927,15 @@ For further details, please refer to [speculative-decoding.md](../../../../docs/
 NVIDIA Dynamo is a high-throughput low-latency inference framework designed for serving generative AI and reasoning models in multi-node distributed environments.
 Dynamo supports TensorRT LLM as one of its inference engine. For details on how to use TensorRT LLM with Dynamo please refer to [LLM Deployment Examples using TensorRT-LLM](https://github.com/ai-dynamo/dynamo/blob/main/examples/tensorrt_llm/README.md)
 
+## Qwen3-Next
+
+Below is the command to run the Qwen3-Next model.
+
+```bash
+mpirun -n 1 --allow-run-as-root --oversubscribe python3 examples/llm-api/quickstart_advanced.py --model_dir /Qwen3-Next-80B-A3B-Thinking --kv_cache_fraction 0.6 --disable_kv_cache_reuse --max_batch_size 1 --tp_size 4
+
+```
+
 ## Notes and Troubleshooting
 
 - **Model Directory:** Update `<YOUR_MODEL_DIR>` with the actual path where the model weights reside.

tensorrt_llm/_torch/custom_ops/__init__.py

@@ -22,13 +22,15 @@
 if IS_FLASHINFER_AVAILABLE:
     from .flashinfer_custom_ops import (
         flashinfer_apply_rope_with_cos_sin_cache_inplace,
-        flashinfer_fused_add_rmsnorm, flashinfer_rmsnorm,
-        flashinfer_silu_and_mul)
+        flashinfer_fused_add_rmsnorm, flashinfer_gemma_fused_add_rmsnorm,
+        flashinfer_gemma_rmsnorm, flashinfer_rmsnorm, flashinfer_silu_and_mul)
     __all__ += [
         'flashinfer_silu_and_mul',
         'flashinfer_rmsnorm',
         'flashinfer_fused_add_rmsnorm',
         'flashinfer_apply_rope_with_cos_sin_cache_inplace',
+        'flashinfer_gemma_fused_add_rmsnorm',
+        'flashinfer_gemma_rmsnorm',
     ]
 
 if IS_CUTLASS_DSL_AVAILABLE:

tensorrt_llm/_torch/custom_ops/flashinfer_custom_ops.py

@@ -4,7 +4,8 @@
 
 if IS_FLASHINFER_AVAILABLE:
     from flashinfer.activation import silu_and_mul
-    from flashinfer.norm import fused_add_rmsnorm, rmsnorm
+    from flashinfer.norm import (fused_add_rmsnorm, gemma_fused_add_rmsnorm,
+                                 gemma_rmsnorm, rmsnorm)
     from flashinfer.rope import apply_rope_with_cos_sin_cache_inplace
 
     # Warp this into custom op since flashinfer didn't warp it properly and we want to avoid graph break between mlp layer for user buffer optimization
@@ -27,13 +28,36 @@ def _(input: torch.Tensor, weight: torch.Tensor,
           eps: float) -> torch.Tensor:
         return torch.empty_like(input)
 
+    @torch.library.custom_op("trtllm::flashinfer_gemma_rmsnorm",
+                             mutates_args=())
+    def flashinfer_gemma_rmsnorm(input: torch.Tensor, weight: torch.Tensor,
+                                 eps: float) -> torch.Tensor:
+        return gemma_rmsnorm(input, weight, eps, enable_pdl=ENABLE_PDL)
+
+    @flashinfer_gemma_rmsnorm.register_fake
+    def _(input: torch.Tensor, weight: torch.Tensor,
+          eps: float) -> torch.Tensor:
+        return torch.empty_like(input)
+
     @torch.library.custom_op("trtllm::flashinfer_fused_add_rmsnorm",
                              mutates_args=("input", "residual"))
     def flashinfer_fused_add_rmsnorm(input: torch.Tensor,
                                      residual: torch.Tensor,
                                      weight: torch.Tensor, eps: float) -> None:
         fused_add_rmsnorm(input, residual, weight, eps, enable_pdl=ENABLE_PDL)
 
+    @torch.library.custom_op("trtllm::flashinfer_gemma_fused_add_rmsnorm",
+                             mutates_args=("input", "residual"))
+    def flashinfer_gemma_fused_add_rmsnorm(input: torch.Tensor,
+                                           residual: torch.Tensor,
+                                           weight: torch.Tensor,
+                                           eps: float) -> None:
+        gemma_fused_add_rmsnorm(input,
+                                residual,
+                                weight,
+                                eps,
+                                enable_pdl=ENABLE_PDL)
+
     @torch.library.custom_op(
         "trtllm::flashinfer_apply_rope_with_cos_sin_cache_inplace",
         mutates_args=("query", "key"))

tensorrt_llm/_torch/models/__init__.py

@@ -26,6 +26,7 @@
 from .modeling_qwen2vl import Qwen2_5_VLModel, Qwen2VLModel
 from .modeling_qwen3 import Qwen3ForCausalLM
 from .modeling_qwen3_moe import Qwen3MoeForCausalLM
+from .modeling_qwen3_next import Qwen3NextForCausalLM
 from .modeling_qwen_moe import Qwen2MoeForCausalLM
 from .modeling_seedoss import SeedOssForCausalLM
 from .modeling_siglip import SiglipVisionModel
@@ -66,6 +67,7 @@
     "Qwen2_5_VLModel",
     "Qwen3ForCausalLM",
     "Qwen3MoeForCausalLM",
+    "Qwen3NextForCausalLM",
     "GptOssForCausalLM",
     "SeedOssForCausalLM",
 ]

tensorrt_llm/_torch/models/checkpoints/__init__.py

@@ -8,12 +8,14 @@
 from .hf.qwen2_moe_weight_mapper import Qwen2MoeHfWeightMapper
 from .hf.qwen2vl_weight_mapper import Qwen2VLHfWeightMapper
 from .hf.qwen3_moe_weight_mapper import Qwen3MoeHfWeightMapper
+from .hf.qwen3_next_weight_mapper import Qwen3NextHfWeightMapper
 from .hf.weight_loader import HfWeightLoader
 from .hf.weight_mapper import HfWeightMapper
 
 __all__ = [
     "HfConfigLoader", "HfWeightLoader", "HfWeightMapper",
     "BaseCheckpointLoader", "HfCheckpointLoader", "NemotronHHfWeightMapper",
     "Gemma3HfWeightMapper", "MixtralHfWeightMapper", "Llama4HfWeightMapper",
-    "Qwen2MoeHfWeightMapper", "Qwen3MoeHfWeightMapper", "Qwen2VLHfWeightMapper"
+    "Qwen2MoeHfWeightMapper", "Qwen3MoeHfWeightMapper", "Qwen2VLHfWeightMapper",
+    "Qwen3NextHfWeightMapper"
 ]

tensorrt_llm/_torch/models/checkpoints/hf/qwen3_next_weight_mapper.py

@@ -0,0 +1,105 @@
+from typing import Union
+
+import torch
+from torch import nn
+
+from tensorrt_llm._torch.model_config import ModelConfig
+from tensorrt_llm._torch.models.checkpoints.hf.qwen2_moe_weight_mapper import \
+    Qwen2MoeHfWeightMapper
+from tensorrt_llm._torch.models.modeling_nemotron_h import split
+from tensorrt_llm._torch.models.modeling_utils import register_mapper
+from tensorrt_llm.models.modeling_utils import DecoderModelForCausalLM
+
+
+@register_mapper("HF", "Qwen3NextForCausalLM")
+class Qwen3NextHfWeightMapper(Qwen2MoeHfWeightMapper):
+
+    def init_model_and_config(self, model: Union[nn.Module,
+                                                 DecoderModelForCausalLM],
+                              config: ModelConfig):
+        super().init_model_and_config(model, config)
+        self._num_kv_heads = model.config.num_key_value_heads if hasattr(
+            model.config, 'num_key_value_heads'
+        ) and model.config.num_key_value_heads is not None else model.config.num_attention_heads
+
+    def should_skip_module(self, module_name: str) -> bool:
+        if module_name.startswith("draft_model"):
+            return True
+        return super().should_skip_module(module_name)
+
+    def _duplicate_kv_weights(self, module: nn.Module, new_name: str,
+                              weights: dict):
+        tensors_to_duplicate = ["weight", "bias"]
+        if module.quant_config.quant_mode.has_nvfp4():
+            tensors_to_duplicate.append("weight_scale")
+        if module.quant_config.quant_mode.has_fp8_block_scales():
+            tensors_to_duplicate.append("weight_scale_inv")
+
+        if new_name in ['k_proj', 'v_proj']:
+            num_kv_heads_list = [self._num_kv_heads
+                                 ] * len(weights) if isinstance(
+                                     self._num_kv_heads,
+                                     int) else self._num_kv_heads
+            processed_weights = {
+                k:
+                self._duplicate_kv(weight=v[:],
+                                   num_kv_heads=num_kv_heads_list[i],
+                                   tensor_parallel_size=self._tp_size)
+                if k in tensors_to_duplicate else v
+                for i, (k, v) in enumerate(weights.items())
+            }
+            return processed_weights
+
+        return weights
+
+    def preprocess_weights(self, weights: dict) -> dict:
+        config = self.config.pretrained_config
+        tp_size = self.config.mapping.tp_size
+        tp_rank = self.config.mapping.tp_rank
+
+        # linear_num_value_heads = config.linear_num_value_heads
+        # linear_num_key_heads = config.linear_num_key_heads
+        # linear_key_head_dim = config.linear_key_head_dim
+        # linear_value_head_dim = config.linear_value_head_dim
+        linear_key_dim = config.linear_key_head_dim * config.linear_num_key_heads  # 16 * 128
+        linear_value_dim = config.linear_value_head_dim * config.linear_num_value_heads  # 32 * 128
+
+        new_weights = {}
+        for name, _ in weights.items():
+            key = name
+
+            if "A_log" in key:
+                w = split(weights[name], tp_size, tp_rank)
+                w = w.to(torch.float32)
+                new_weights[key] = w
+            elif "dt_bias" in key:
+                w = split(weights[name], tp_size, tp_rank)
+                w = w.to(torch.float32)
+                new_weights[key] = w
+            elif "in_proj" in key:
+                # Don't need to split in_proj weight based on the implementation of reference.
+                # Need to know the reason.
+                new_weights[key] = weights[name]
+            elif "conv1d" in key:
+                w = weights[name]
+                # removing dim(1) because we are using Linear to store conv1d weights
+                if "weight" in key:
+                    w = w.squeeze(1)
+
+                conv_q, conv_k, conv_v = torch.split(
+                    w, [linear_key_dim, linear_key_dim, linear_value_dim],
+                    dim=0)
+
+                w = []
+                for rank in range(tp_size):
+                    conv_q_rank = split(conv_q, tp_size, rank)
+                    conv_k_rank = split(conv_k, tp_size, rank)
+                    conv_v_rank = split(conv_v, tp_size, rank)
+                    y = torch.concat([conv_q_rank, conv_k_rank, conv_v_rank])
+                    w.append(y)
+                w = torch.concat(w).contiguous()
+                new_weights[key] = w
+            else:
+                new_weights[key] = weights[name]
+
+        return new_weights

tensorrt_llm/_torch/models/modeling_qwen3.py

@@ -32,8 +32,12 @@ def __init__(
         model_config: ModelConfig[Qwen3Config],
         layer_idx: Optional[int] = None,
         fuse_qk_norm_rope: bool = True,
+        attn_output_gate: bool = False,
+        use_gemma_rms_norm: bool = False,
     ):
         config = model_config.pretrained_config
+        self.pretrained_config = config
+        self.attn_output_gate = attn_output_gate
 
         if getattr(config, "rope_scaling", None) is not None:
             if "type" in config.rope_scaling:
@@ -58,13 +62,15 @@ def __init__(
             num_attention_heads=config.num_attention_heads,
             num_key_value_heads=config.num_key_value_heads,
             max_position_embeddings=config.max_position_embeddings,
-            bias=config.attention_bias,
+            bias=getattr(config, "attention_bias", None),
             pos_embd_params=pos_embd_params,
             fuse_qk_norm_rope=fuse_qk_norm_rope,
             layer_idx=layer_idx,
             dtype=config.torch_dtype,
-            dense_bias=config.attention_bias,
+            dense_bias=getattr(config, "attention_bias", None),
             config=model_config,
+            attn_output_gate=self.attn_output_gate,
+            use_gemma_rms_norm=use_gemma_rms_norm,
         )