adapt w4a8 marlin deepep dp ep

python/sglang/srt/_custom_ops.py

@@ -5,6 +5,15 @@ from typing import List, Optional, Tuple
 import torch
 
 from sglang.srt.utils import get_bool_env_var, is_hip, is_hpu, is_npu
+try:
+    from lmslim import quant_ops 
+    from lmslim import quant_tools 
+except Exception:
+    print("INFO: Please install lmslim if you want to infer gptq or awq  or w8a8 model.\n") 
+try:
+    import lightop
+except Exception:
+    print("INFO: Please install lightop if you want to infer awq of marlin.\n") 
 
 logger = logging.getLogger(__name__)
 use_vllm_custom_allreduce = get_bool_env_var(
@@ -175,3 +184,25 @@ def mscclpp_allreduce(
     context: int, inp: torch.Tensor, out: torch.Tensor, nthreads: int, nblocks: int
 ) -> None:
     return sgl_kernel.allreduce.mscclpp_allreduce(context, inp, out, nthreads, nblocks)
+
+def triton_scaled_mm(a: torch.Tensor,
+                      b: torch.Tensor,
+                      scale_a: torch.Tensor,
+                      scale_b: torch.Tensor,
+                      out_dtype: torch.dtype,
+                      bias: Optional[torch.Tensor] = None,
+                      best_config:Optional[list] = None) -> torch.Tensor:
+
+    return quant_ops.triton_scaled_mm(a, b,scale_a,scale_b,out_dtype,bias,best_config)
+
+def triton_int8_gemm_helper(m: int,
+                             n: int,
+                             k: int,
+                             per_token_act_quant: bool,
+                             per_out_channel_weight_quant: bool,
+                             use_bias: bool,
+                             out_dtype: type[torch.dtype] = torch.float16,
+                             device: str = "cuda:0",
+                             best_config:Optional[list] = None,
+                             repeat:Optional[int] = 2):
+    return quant_tools.triton_int8_gemm_helper(m,n,k,per_token_act_quant,per_out_channel_weight_quant,use_bias,out_dtype,device,best_config,repeat)

python/sglang/srt/configs/model_config.py

@@ -508,6 +508,7 @@ class ModelConfig:
             "petit_nvfp4",
             "quark",
             "mxfp4",
+            "slimquant_w4a8_marlin",
         ]
         optimized_quantization_methods = [
             "fp8",
@@ -526,6 +527,7 @@ class ModelConfig:
             "qoq",
             "w4afp8",
             "petit_nvfp4",
+            "slimquant_w4a8_marlin",
         ]
         compatible_quantization_methods = {
             "modelopt_fp4": ["modelopt"],

python/sglang/srt/disaggregation/decode_kvcache_offload_manager.py

@@ -4,7 +4,7 @@ import time
 
 import torch
 
-from sglang import ServerArgs
+from sglang.srt.server_args import ServerArgs
 from sglang.srt.managers.cache_controller import HiCacheController
 from sglang.srt.mem_cache.allocator import BaseTokenToKVPoolAllocator
 from sglang.srt.mem_cache.base_prefix_cache import BasePrefixCache

python/sglang/srt/layers/layernorm.py

@@ -127,21 +127,45 @@ class RMSNorm(CustomOp):
             return output, residual_out
         return rms_norm(x, self.weight.data, self.variance_epsilon)
 
+    # def forward_hip(
+    #     self,
+    #     x: torch.Tensor,
+    #     residual: Optional[torch.Tensor] = None,
+    # ) -> Union[torch.Tensor, Tuple[torch.Tensor, torch.Tensor]]:
+    #     if not x.is_contiguous():
+    #         # NOTE: Remove this if aiter kernel supports discontinuous input
+    #         x = x.contiguous()
+    #     if residual is not None:
+    #         if _vllm_version < Version("0.9"):
+    #             fused_add_rms_norm(x, residual, self.weight.data, self.variance_epsilon)
+    #             return x, residual
+    #         else:
+    #             residual_out = torch.empty_like(x)
+    #             output = torch.empty_like(x)
+    #             fused_add_rms_norm(
+    #                 output,
+    #                 x,
+    #                 residual_out,
+    #                 residual,
+    #                 self.weight.data,
+    #                 self.variance_epsilon,
+    #             )
+    #             return output, residual_out
+    #     out = torch.empty_like(x)
+    #     rms_norm(out, x, self.weight.data, self.variance_epsilon)
+    #     return out
     def forward_hip(
-        self,
+    self,
-        x: torch.Tensor,
+    x: torch.Tensor,
-        residual: Optional[torch.Tensor] = None,
+    residual: Optional[torch.Tensor] = None,
-    ) -> Union[torch.Tensor, Tuple[torch.Tensor, torch.Tensor]]:
+    ):
         if not x.is_contiguous():
-            # NOTE: Remove this if aiter kernel supports discontinuous input
             x = x.contiguous()
+
         if residual is not None:
-            if _vllm_version < Version("0.9"):
+            try:
-                fused_add_rms_norm(x, residual, self.weight.data, self.variance_epsilon)
-                return x, residual
-            else:
-                residual_out = torch.empty_like(x)
                 output = torch.empty_like(x)
+                residual_out = torch.empty_like(x)
                 fused_add_rms_norm(
                     output,
                     x,
@@ -151,10 +175,21 @@ class RMSNorm(CustomOp):
                     self.variance_epsilon,
                 )
                 return output, residual_out
+            except TypeError:
+                fused_add_rms_norm(
+                    x,
+                    residual,
+                    self.weight.data,
+                    self.variance_epsilon,
+                )
+                return x, residual
+
         out = torch.empty_like(x)
         rms_norm(out, x, self.weight.data, self.variance_epsilon)
         return out
 
+    
+
     def forward_native(
         self,
         x: torch.Tensor,

python/sglang/srt/layers/moe/ep_moe/layer.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import logging
 from typing import TYPE_CHECKING, List, Optional, Union
 
+from sglang.srt.layers.quantization.slimquant_w4a8_marlin import SlimQuantW4A8Int8MarlinConfig
 import torch
 import triton
 import triton.language as tl
@@ -124,7 +125,6 @@ class EPMoE(FusedMoE):
         )
 
         self.intermediate_size = intermediate_size
-
         if isinstance(quant_config, Fp8Config):
             self.use_block_quant = getattr(self.quant_method, "block_quant", False)
             self.block_shape = (
@@ -135,11 +135,23 @@ class EPMoE(FusedMoE):
             self.use_fp8_w8a8 = True
             self.fp8_dtype = torch.float8_e4m3fn
             self.activation_scheme = quant_config.activation_scheme
+            self.use_w4a8_marlin = False
+        elif isinstance(quant_config, SlimQuantW4A8Int8MarlinConfig):
+            self.use_block_quant = getattr(self.quant_method, "block_quant", False)
+            self.block_shape = (
+                self.quant_method.quant_config.weight_block_size
+                if self.use_block_quant
+                else None
+            )
+            self.use_fp8_w8a8 = False
+            self.activation_scheme = None
+            self.use_w4a8_marlin = True
         else:
             self.use_fp8_w8a8 = False
             self.use_block_quant = False
             self.block_shape = None
             self.activation_scheme = None
+            self.use_w4a8_marlin = False
 
     def forward(self, hidden_states: torch.Tensor, topk_output: TopKOutput):
         if deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM and self.use_fp8_w8a8:
@@ -386,11 +398,11 @@ class DeepEPMoE(EPMoE):
             return_recv_hook=True,
         )
 
-        if self.deepep_mode.enable_low_latency() and not _is_npu:
+        # if self.deepep_mode.enable_low_latency() and not _is_npu:
-            # NPU supports low_latency deepep without deepgemm
+        #     # NPU supports low_latency deepep without deepgemm
-            assert (
+        #     assert (
-                deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM
+        #         deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM
-            ), f"DeepEP {self.deepep_mode} mode requires deep_gemm"
+        #     ), f"DeepEP {self.deepep_mode} mode requires deep_gemm"
         if _use_aiter:
             # expert_mask is of size (self.num_local_experts + 1),
             # the extra 1 is for invalid rank_id (in original deepep, the invalid rank_id is -1, but aiter does not allow -1, we use a mask to make those ids invalid)
@@ -404,23 +416,23 @@ class DeepEPMoE(EPMoE):
             )
             # the last one is invalid rank_id
             self.expert_mask[:-1] = 1
-        elif not _is_npu:
+        # elif not _is_npu:
-            self.w13_weight_fp8 = (
+        #     self.w13_weight_fp8 = (
-                self.w13_weight,
+        #         self.w13_weight,
-                (
+        #         (
-                    self.w13_weight_scale_inv
+        #             self.w13_weight_scale_inv
-                    if self.use_block_quant
+        #             if self.use_block_quant
-                    else self.w13_weight_scale
+        #             else self.w13_weight_scale
-                ),
+        #         ),
-            )
+        #     )
-            self.w2_weight_fp8 = (
+        #     self.w2_weight_fp8 = (
-                self.w2_weight,
+        #         self.w2_weight,
-                (
+        #         (
-                    self.w2_weight_scale_inv
+        #             self.w2_weight_scale_inv
-                    if self.use_block_quant
+        #             if self.use_block_quant
-                    else self.w2_weight_scale
+        #             else self.w2_weight_scale
-                ),
+        #         ),
-            )
+        #     )
 
     def forward(
         self,
@@ -466,8 +478,15 @@ class DeepEPMoE(EPMoE):
             assert DispatchOutputChecker.format_is_deepep(dispatch_output)
             return self.forward_npu(dispatch_output)
         if DispatchOutputChecker.format_is_deepep_normal(dispatch_output):
-            assert deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM and self.use_fp8_w8a8
+            #assert deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM and self.use_fp8_w8a8
-            return self.forward_deepgemm_contiguous(dispatch_output)
+            if deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM and self.use_fp8_w8a8:
+                return self.forward_deepgemm_contiguous(dispatch_output)
+            elif self.use_w4a8_marlin:
+                return self.forward_deepgemm_w4a8_marlin_contiguous(dispatch_output)
+            else:
+                raise ValueError(
+                    f"Dispatch output is not supported"
+                )
         elif DispatchOutputChecker.format_is_deepep_ll(dispatch_output):
             if get_moe_runner_backend().is_flashinfer_cutedsl():
                 return self.forward_flashinfer_cutedsl(dispatch_output)
@@ -526,6 +545,34 @@ class DeepEPMoE(EPMoE):
             expert_mask=self.expert_mask,
         )
 
+    def forward_deepgemm_w4a8_marlin_contiguous(
+        self, 
+        dispatch_output: DeepEPNormalOutput,
+    ):
+        hidden_states_int8, topk_idx, topk_weights, num_recv_tokens_per_expert = (
+            dispatch_output
+        )
+        assert self.quant_method is not None
+        assert self.moe_runner_config.activation == "silu"
+        # if num_recv_tokens_per_expert is None:
+        return hidden_states_int8.bfloat16()
+        # expert_output = self.quant_method.apply_ep(
+        #     layer=self,
+        #     x=dispatch_output,
+        #     topk_weights=topk_weights,
+        #     topk_ids=topk_idx,
+        #     global_num_experts=self.global_num_experts,
+        #     expert_map=self.expert_map,
+        #     activation=self.activation,
+        #     apply_router_weight_on_input=self.apply_router_weight_on_input,
+        #     use_nn_moe=self.use_nn_moe,
+        #     num_local_tokens=dispatch_recv_num_token,
+        #     config_select_bs=hidden_states.shape[0],
+        #     scales=dispatch_scales if self.use_int8_dispatch else None
+        #     # routed_scaling_factor=self.routed_scaling_factor,
+        # )
+        # return expert_output
+
     def forward_deepgemm_contiguous(
         self,
         dispatch_output: DeepEPNormalOutput,

python/sglang/srt/layers/moe/fused_moe_triton/fused_moe.py

@@ -61,7 +61,7 @@ def inplace_fused_experts(
     topk_ids: torch.Tensor,
     b1: Optional[torch.Tensor] = None,
     b2: Optional[torch.Tensor] = None,
-    activation: str = "silu",
+    activation: int = 0,#0 silu 1 gelu
     apply_router_weight_on_input: bool = False,
     use_fp8_w8a8: bool = False,
     use_int8_w8a8: bool = False,
@@ -79,6 +79,8 @@ def inplace_fused_experts(
     gemm1_alpha: Optional[float] = None,
     gemm1_limit: Optional[float] = None,
 ) -> None:
+    if isinstance(activation, int):
+        activation = "silu" if activation == 0 else "gelu"
     fused_experts_impl(
         hidden_states,
         w1,
@@ -117,7 +119,7 @@ def inplace_fused_experts_fake(
     topk_ids: torch.Tensor,
     b1: Optional[torch.Tensor] = None,
     b2: Optional[torch.Tensor] = None,
-    activation: str = "silu",
+    activation: int = 0,#0 silu 1 gelu
     apply_router_weight_on_input: bool = False,
     use_fp8_w8a8: bool = False,
     use_int8_w8a8: bool = False,
@@ -154,7 +156,7 @@ def outplace_fused_experts(
     topk_ids: torch.Tensor,
     b1: Optional[torch.Tensor] = None,
     b2: Optional[torch.Tensor] = None,
-    activation: str = "silu",
+    activation: int = 0,#0 silu 1 gelu
     apply_router_weight_on_input: bool = False,
     use_fp8_w8a8: bool = False,
     use_int8_w8a8: bool = False,
@@ -173,6 +175,8 @@ def outplace_fused_experts(
     gemm1_alpha: Optional[float] = None,
     gemm1_limit: Optional[float] = None,
 ) -> torch.Tensor:
+    if isinstance(activation, int):
+        activation = "silu" if activation == 0 else "gelu"
     return fused_experts_impl(
         hidden_states,
         w1,
@@ -211,7 +215,7 @@ def outplace_fused_experts_fake(
     topk_ids: torch.Tensor,
     b1: Optional[torch.Tensor] = None,
     b2: Optional[torch.Tensor] = None,
-    activation: str = "silu",
+    activation: int = 0,#0 silu 1 gelu
     apply_router_weight_on_input: bool = False,
     use_fp8_w8a8: bool = False,
     use_int8_w8a8: bool = False,
@@ -263,6 +267,13 @@ def fused_experts(
     block_shape: Optional[List[int]] = None,
 ):
     topk_weights, topk_ids, _ = topk_output
+    act_id = (
+        0 if (
+            moe_runner_config.activation == 0
+            or (isinstance(moe_runner_config.activation, str)
+                and moe_runner_config.activation.lower() == "silu")
+        ) else 1
+    )
     if moe_runner_config.inplace:
         assert not moe_runner_config.no_combine, "no combine + inplace makes no sense"
         torch.ops.sglang.inplace_fused_experts(
@@ -273,7 +284,7 @@ def fused_experts(
             topk_ids,
             b1,
             b2,
-            moe_runner_config.activation,
+            act_id, 
             moe_runner_config.apply_router_weight_on_input,
             use_fp8_w8a8,
             use_int8_w8a8,
@@ -301,7 +312,7 @@ def fused_experts(
             topk_ids,
             b1,
             b2,
-            moe_runner_config.activation,
+            act_id, 
             moe_runner_config.apply_router_weight_on_input,
             use_fp8_w8a8,
             use_int8_w8a8,
@@ -345,7 +356,7 @@ def fused_experts_impl(
     b1: Optional[torch.Tensor] = None,
     b2: Optional[torch.Tensor] = None,
     inplace: bool = False,
-    activation: str = "silu",
+    activation: int = 0,#0 silu 1 gelu
     apply_router_weight_on_input: bool = False,
     use_fp8_w8a8: bool = False,
     use_int8_w8a8: bool = False,
@@ -364,6 +375,9 @@ def fused_experts_impl(
     gemm1_alpha: Optional[float] = None,
     gemm1_limit: Optional[float] = None,
 ):
+    if isinstance(activation, int):
+        activation = "silu" if activation == 0 else "gelu"
+        
     padded_size = padding_size
     if not (use_fp8_w8a8 or use_int8_w8a8) or block_shape is not None or _use_aiter:
         padded_size = 0

python/sglang/srt/layers/moe/token_dispatcher/deepep.py

@@ -431,32 +431,32 @@ class _DeepEPDispatcherImplNormal(_DeepEPDispatcherImplBase):
             deepep_post_reorder_triton_kernel,
         )
 
-        if deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM or _use_aiter or _is_npu:
+        #if deep_gemm_wrapper.ENABLE_JIT_DEEPGEMM or _use_aiter or _is_npu:
-            output = hidden_states
+        output = hidden_states
-        else:
+        # else:
-            if hidden_states.shape[0] > 0:
+        #     if hidden_states.shape[0] > 0:
-                num_tokens = self.src2dst.shape[0] // self.router_topk
+        #         num_tokens = self.src2dst.shape[0] // self.router_topk
-                output = torch.empty(
+        #         output = torch.empty(
-                    (num_tokens, hidden_states.shape[1]),
+        #             (num_tokens, hidden_states.shape[1]),
-                    device=hidden_states.device,
+        #             device=hidden_states.device,
-                    dtype=hidden_states.dtype,
+        #             dtype=hidden_states.dtype,
-                )
+        #         )
-                deepep_post_reorder_triton_kernel[(num_tokens,)](
+        #         deepep_post_reorder_triton_kernel[(num_tokens,)](
-                    hidden_states,
+        #             hidden_states,
-                    output,
+        #             output,
-                    self.src2dst,
+        #             self.src2dst,
-                    topk_idx,
+        #             topk_idx,
-                    topk_weights,
+        #             topk_weights,
-                    self.router_topk,
+        #             self.router_topk,
-                    hidden_states.shape[1],
+        #             hidden_states.shape[1],
-                    BLOCK_SIZE=512,
+        #             BLOCK_SIZE=512,
-                )
+        #         )
-            else:
+        #     else:
-                output = torch.zeros(
+        #         output = torch.zeros(
-                    (0, hidden_states.shape[1]),
+        #             (0, hidden_states.shape[1]),
-                    device=hidden_states.device,
+        #             device=hidden_states.device,
-                    dtype=hidden_states.dtype,
+        #             dtype=hidden_states.dtype,
-                )
+        #         )
         previous_event = Buffer.capture() if self.async_finish else None
         return output, previous_event
 

python/sglang/srt/layers/quantization/__init__.py

@@ -61,6 +61,7 @@ from sglang.srt.layers.quantization.qoq import QoQConfig
 from sglang.srt.layers.quantization.w4afp8 import W4AFp8Config
 from sglang.srt.layers.quantization.w8a8_fp8 import W8A8Fp8Config
 from sglang.srt.layers.quantization.w8a8_int8 import W8A8Int8Config
+from sglang.srt.layers.quantization.slimquant_w4a8_marlin import SlimQuantW4A8Int8MarlinConfig
 from sglang.srt.utils import is_cuda, is_hip, mxfp_supported
 
 _is_mxfp_supported = mxfp_supported()
@@ -86,6 +87,7 @@ BASE_QUANTIZATION_METHODS: Dict[str, Type[QuantizationConfig]] = {
     "w4afp8": W4AFp8Config,
     "petit_nvfp4": PetitNvFp4Config,
     "fbgemm_fp8": FBGEMMFp8Config,
+    "slimquant_w4a8_marlin":SlimQuantW4A8Int8MarlinConfig,
 }
 
 

python/sglang/srt/layers/quantization/slimquant_w4a8.py

@@ -0,0 +1,415 @@
+from typing import Any, Callable, Dict, List, Optional
+
+import torch
+from sglang.srt.layers.linear import set_weight_attrs
+from sglang.srt.distributed import get_tensor_model_parallel_world_size
+from torch.nn.parameter import Parameter
+from sglang.srt.layers.linear import LinearBase
+from sglang.srt.layers.quantization.base_config import LinearMethodBase, QuantizationConfig, QuantizeMethodBase, FusedMoEMethodBase
+from sglang.srt.layers.parameter import (
+    ChannelQuantScaleParameter,
+    _ColumnvLLMParameter,
+    RowvLLMParameter,
+)
+from lmslim.layers.gemm.int8_utils import (
+    per_token_group_quant_int8,
+    per_token_quant_int8)
+from sglang.srt import _custom_ops as ops
+from vllm.utils import W8a8GetCacheJSON
+from sglang.srt.layers.moe import MoeRunner, MoeRunnerBackend, MoeRunnerConfig
+
+import os
+
+class ModelWeightParameter(_ColumnvLLMParameter, RowvLLMParameter):
+    """
+    Parameter class for linear layer weights. Uses both column and
+    row parallelism.
+    """
+    pass
+
+W8A8_TRITONJSON=W8a8GetCacheJSON()
+
+def baseline_scaled_mm(a: torch.Tensor,
+                      b: torch.Tensor,
+                      scale_a: torch.Tensor,
+                      scale_b: torch.Tensor,
+                      out_dtype: torch.dtype,
+                      bias: Optional[torch.Tensor] = None) -> torch.Tensor:
+
+    scales= scale_a* scale_b.T
+    gemmout= torch.mm(
+        a.to(dtype=torch.float32), b.to(dtype=torch.float32))
+    output = (scales *gemmout).to(out_dtype)
+    if bias is not None:
+        output = output + bias
+    return output.to(out_dtype)
+
+
+class SlimQuantW4A8Int8Config(QuantizationConfig):
+    """Config class for W8A8 Int8 Quantization.
+
+    - Weight: static, per-channel, symmetric
+    - Activation: dynamic, per-token, symmetric
+    """
+
+    def __init__(self):
+        pass
+
+    @classmethod
+    def get_supported_act_dtypes(cls) -> List[torch.dtype]:
+        return [torch.float16, torch.bfloat16]
+
+    @classmethod
+    def get_min_capability(cls) -> int:
+        return 75
+
+    @classmethod
+    def get_name(self) -> str:
+        return "slimquant_w4a8"
+
+    @classmethod
+    def get_config_filenames(cls) -> List[str]:
+        return []
+
+    @classmethod
+    def from_config(cls, config: Dict[str, Any]) -> "SlimQuantW4A8Int8Config":
+        return cls()
+
+    def get_quant_method(
+        self,
+        layer: torch.nn.Module,
+        prefix: str,
+    ) -> Optional["QuantizeMethodBase"]:
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+
+        if isinstance(layer, LinearBase):
+            return SlimQuantW4A8Int8LinearMethod(self)
+        elif isinstance(layer, FusedMoE):
+            return SlimQuantW4A8Int8MoEMethod(self)
+        return None
+
+    def get_scaled_act_names(self) -> List[str]:
+        return []
+
+
+class SlimQuantW4A8Int8LinearMethod(LinearMethodBase):
+
+    def __init__(self, quantization_config: SlimQuantW4A8Int8Config):
+        self.quantization_config = quantization_config
+        self.tritonsingleton= W8a8GetCacheJSON()
+        self.w8a8_strategy=int(os.getenv('W8A8_SUPPORT_METHODS', '1'))
+        
+    def process_weights_after_loading(self, layer: torch.nn.Module) -> None:
+        n=layer.weight.shape[0]
+        k=layer.weight.shape[1]
+        
+        if self.w8a8_strategy==1:
+            if {n,k} not in self.tritonsingleton.weight_shapes:
+                self.tritonsingleton.weight_shapes.append({n,k})
+                json_file=self.tritonsingleton.get_w8a8json_name(n,k)
+                configs_dict=self.tritonsingleton.get_triton_cache(json_file,n,k)
+                
+                if configs_dict:
+                    self.tritonsingleton.triton_json_dict.update(configs_dict)
+                    
+                    for key, value in configs_dict.items():
+                        m=int(key.split('_')[0])
+                        ops.triton_int8_gemm_helper(m=m,n=n,k=k,per_token_act_quant=True,per_out_channel_weight_quant=True,use_bias=False,device=layer.weight.device,best_config=value)
+        else: 
+            weight_data=layer.weight.data
+            _weight=weight_data.T.contiguous().reshape(n,-1)
+            layer.weight.data=_weight
+            
+        layer.weight = Parameter(layer.weight.t(), requires_grad=False)
+        layer.weight_scale = Parameter(layer.weight_scale.data, requires_grad=False)
+
+    def create_weights(
+        self,
+        layer: torch.nn.Module,
+        input_size_per_partition: int,
+        output_partition_sizes: List[int],
+        input_size: int,
+        output_size: int,
+        params_dtype: torch.dtype,
+        **extra_weight_attrs,
+    ):
+
+        weight_loader = extra_weight_attrs.get("weight_loader")
+        self.logical_widths = output_partition_sizes
+
+        weight = ModelWeightParameter(
+            data=torch.empty(
+                sum(output_partition_sizes), input_size_per_partition, dtype=torch.int8
+            ),
+            input_dim=1,
+            output_dim=0,
+            weight_loader=weight_loader,
+        )
+        layer.register_parameter("weight", weight)
+
+        weight_scale = ChannelQuantScaleParameter(
+            data=torch.empty((sum(output_partition_sizes), 1), dtype=torch.float32),
+            output_dim=0,
+            weight_loader=weight_loader,
+        )
+        layer.register_parameter("weight_scale", weight_scale)
+
+    def apply(
+        self,
+        layer: torch.nn.Module,
+        x: torch.Tensor,
+        bias: Optional[torch.Tensor] = None,
+        input_quant_args: Optional[list[torch.Tensor]] = None,
+        silu_quant_args: Optional[list[torch.Tensor]] = None
+    ):
+        # if envs.USE_FUSED_RMS_QUANT and input_quant_args is not None:
+        #     assert len(input_quant_args) == 2
+        #     x_q, x_scale = input_quant_args
+        # elif envs.USE_FUSED_SILU_MUL_QUANT and silu_quant_args is not None:
+        #     x_q, x_scale = silu_quant_args
+        # else:
+        x_q, x_scale = per_token_quant_int8(x)
+
+        if self.w8a8_strategy==1:
+            m=x_q.shape[0]
+            k=x_q.shape[1]
+            n=layer.weight.shape[1]
+            
+            if len(W8A8_TRITONJSON.triton_json_dict)==0:
+                best_config=None
+                
+            elif f"1_{n}_{k}" in  W8A8_TRITONJSON.triton_json_dict:
+                if m<=16:
+                    m_=m
+                elif m<=64:
+                    m_= (m + 3) & -4 #取值到最近的4的倍数
+                elif m<=160:
+                    m_=(m + 7) & -8
+                    
+                elif m<200: #256
+                    m_=160
+                elif m<480: #512
+                    m_=256
+                elif m<960: #1024
+                    m_=512
+                elif m<2048:
+                    m_=1024
+                elif m<4096:
+                    m_=2048
+                elif m<6000:
+                    m_=4096
+                else:
+                    m_=8192  
+
+                best_config=W8A8_TRITONJSON.triton_json_dict[f"{m_}_{n}_{k}"]
+                
+            else: 
+                best_config=None
+                
+            #if best_config==None:
+            #    print("m:{},n:{},k:{}".format(m,n,k))
+            #    print("config not found!")
+
+            return ops.triton_scaled_mm(x_q,
+                                        layer.weight,
+                                        scale_a=x_scale,
+                                        scale_b=layer.weight_scale,
+                                        out_dtype=x.dtype,
+                                        bias=bias,best_config=best_config)
+        elif self.w8a8_strategy==2:
+            return ops.cutlass_scaled_mm(x_q,
+                                        layer.weight,
+                                        scale_a=x_scale,
+                                        scale_b=layer.weight_scale,
+                                        out_dtype=x.dtype,
+                                        bias=bias)
+        else:
+            return ops.rocblas_scaled_mm(x_q,
+                                        layer.weight,
+                                        scale_a=x_scale,
+                                        scale_b=layer.weight_scale,
+                                        out_dtype=x.dtype,
+                                        bias=bias) 
+
+
+class SlimQuantW4A8Int8MoEMethod:
+    """MoE method for W4A8INT8.
+    Supports loading INT8 checkpoints with static weight scale and
+    dynamic/static activation scale.
+    Also supports loading quantized FP16/BF16 model checkpoints with dynamic
+    activation scaling. The weight scaling factor will be initialized after
+    the model weights are loaded.
+    Args:
+        quant_config: The quantization config.
+    """
+
+    def __new__(cls, *args, **kwargs):
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+
+        if not hasattr(cls, "_initialized"):
+            original_init = cls.__init__
+            new_cls = type(
+                cls.__name__,
+                (FusedMoEMethodBase,),
+                {
+                    "__init__": original_init,
+                    **{k: v for k, v in cls.__dict__.items() if k != "__dict__"},
+                },
+            )
+            obj = super(new_cls, new_cls).__new__(new_cls)
+            obj.__init__(*args, **kwargs)
+            return obj
+        return super().__new__(cls)
+
+    def __init__(self, quant_config):
+        self.quant_config = quant_config
+        self.tritonsingleton= W8a8GetCacheJSON()
+
+    def create_weights(
+        self,
+        layer: torch.nn.Module,
+        num_experts: int,
+        hidden_size: int,
+        intermediate_size: int,
+        params_dtype: torch.dtype,
+        **extra_weight_attrs,
+    ):
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+        tp_size = get_tensor_model_parallel_world_size()
+
+        # WEIGHTS
+        w13_weight = torch.nn.Parameter(
+            torch.empty(
+                num_experts, 2 * intermediate_size, hidden_size//2, dtype=torch.int8
+            ),
+            requires_grad=False,
+        )
+        layer.register_parameter("w13_weight", w13_weight)
+        set_weight_attrs(w13_weight, extra_weight_attrs)
+
+        w2_weight = torch.nn.Parameter(
+            torch.empty(num_experts, hidden_size, intermediate_size//2, dtype=torch.int8),
+            requires_grad=False,
+        )
+        layer.register_parameter("w2_weight", w2_weight)
+        set_weight_attrs(w2_weight, extra_weight_attrs)
+
+        w13_weight_scale = torch.nn.Parameter(
+            torch.ones(num_experts, 2 * intermediate_size, 1, dtype=torch.float32),
+            requires_grad=False,
+        )
+        w2_weight_scale = torch.nn.Parameter(
+            torch.ones(num_experts, hidden_size, 1, dtype=torch.float32),
+            requires_grad=False,
+        )
+        layer.register_parameter("w13_weight_scale", w13_weight_scale)
+        layer.register_parameter("w2_weight_scale", w2_weight_scale)
+
+        extra_weight_attrs.update(
+            {"quant_method": FusedMoeWeightScaleSupported.CHANNEL.value}
+        )
+
+        set_weight_attrs(w13_weight_scale, extra_weight_attrs)
+        set_weight_attrs(w2_weight_scale, extra_weight_attrs)
+
+        w13_input_scale = None
+        layer.register_parameter("w13_input_scale", w13_input_scale)
+
+        w2_input_scale = None
+        layer.register_parameter("w2_input_scale", w2_input_scale)
+
+    def process_weights_after_loading(self, layer: torch.nn.Module) -> None:
+        E=layer.w13_weight.shape[0]
+        N1=layer.w13_weight.shape[1]
+        N2=layer.w2_weight.shape[1]
+        K=N1//2
+        if [E,N1,N2,K] not in self.tritonsingleton.moe_weight_shapes:
+            self.tritonsingleton.moe_weight_shapes.append([E,N1,N2,K])
+            
+        TOPK= self.tritonsingleton.topk
+
+        json_file=self.tritonsingleton.get_moeint8json_name(E,N1,N2,K,TOPK,use_int4_w4a8=True)
+        configs_dict=self.tritonsingleton.get_moeint8_triton_cache(json_file,E,N1,N2,K,TOPK)
+        
+        #warmup
+        if configs_dict:
+            self.tritonsingleton.triton_moejson_dict.update(configs_dict)
+
+        layer.w13_weight = Parameter(layer.w13_weight, requires_grad=False)
+        layer.w2_weight = Parameter(layer.w2_weight, requires_grad=False)
+        layer.w13_weight_scale = Parameter(
+            layer.w13_weight_scale.data, requires_grad=False
+        )
+        layer.w2_weight_scale = Parameter(
+            layer.w2_weight_scale.data, requires_grad=False
+        )
+
+    def create_moe_runner(
+        self, layer: torch.nn.Module, moe_runner_config: MoeRunnerConfig
+    ):
+        self.moe_runner_config = moe_runner_config
+        self.runner = MoeRunner(MoeRunnerBackend.TRITON, moe_runner_config)
+
+    def apply(
+        self,
+        layer: torch.nn.Module,
+        x: torch.Tensor,
+        router_logits: torch.Tensor,
+        top_k: int,
+        renormalize: bool,
+        use_grouped_topk: bool = False,
+        topk_group: Optional[int] = None,
+        num_expert_group: Optional[int] = None,
+        global_num_experts: int = -1,
+        expert_map: Optional[torch.Tensor] = None,
+        custom_routing_function: Optional[Callable] = None,
+        scoring_func: str = "softmax",
+        e_score_correction_bias: Optional[torch.Tensor] = None,
+        apply_router_weight_on_input: bool = False,
+        activation: str = "silu",
+        enable_eplb: bool = False,
+        use_nn_moe: Optional[bool] = False,
+        routed_scaling_factor: Optional[float] = None,
+        use_fused_gate: Optional[bool] = False,
+        **_  
+    ) -> torch.Tensor:
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+        from sglang.srt.layers.moe.fused_moe_triton.fused_moe import fused_experts
+        if enable_eplb:
+            raise NotImplementedError(
+                "EPLB not supported for `SlimQuantW4A8Int8MoEMethod` yet.")   
+        # Expert selection
+        topk_weights, topk_ids = FusedMoE.select_experts(
+            hidden_states=x,
+            router_logits=router_logits,
+            use_grouped_topk=use_grouped_topk,
+            top_k=top_k,
+            renormalize=renormalize,
+            topk_group=topk_group,
+            num_expert_group=num_expert_group,
+            custom_routing_function=custom_routing_function,
+            scoring_func=scoring_func,
+            e_score_correction_bias=e_score_correction_bias,
+            routed_scaling_factor=routed_scaling_factor,
+            use_fused_gate=use_fused_gate
+        )
+
+        return fused_experts(
+            x,
+            layer.w13_weight,
+            layer.w2_weight,
+            topk_weights=topk_weights,
+            topk_ids=topk_ids,
+            inplace=True,
+            use_int4_w4a8=True,
+            per_channel_quant=True,
+            activation=activation,
+            expert_map=expert_map,
+            apply_router_weight_on_input=apply_router_weight_on_input,
+            global_num_experts=global_num_experts,
+            w1_scale=(layer.w13_weight_scale),
+            w2_scale=(layer.w2_weight_scale),
+            a1_scale=layer.w13_input_scale,
+            a2_scale=layer.w2_input_scale,
+            use_nn_moe=use_nn_moe,
+        )

python/sglang/srt/layers/quantization/slimquant_w4a8_marlin.py

@@ -0,0 +1,318 @@
+from typing import Any, Callable, Dict, List, Optional
+from sglang.srt.layers.moe.token_dispatcher.base import CombineInput
+from sglang.srt.layers.moe.token_dispatcher.standard import StandardCombineInput, StandardDispatchOutput
+import torch
+from sglang.srt import _custom_ops as ops
+from sglang.srt.utils import set_weight_attrs
+from sglang.srt.distributed import get_tensor_model_parallel_world_size
+from torch.nn.parameter import Parameter
+from sglang.srt.layers.linear import LinearBase
+from sglang.srt.layers.quantization import QuantizationConfig
+from sglang.srt.layers.quantization.w4a8_utils import w4a8_weight_repack_impl
+from sglang.srt.layers.quantization.base_config import (FusedMoEMethodBase, QuantizeMethodBase)
+from sglang.srt.layers.quantization.slimquant_w4a8 import SlimQuantW4A8Int8LinearMethod
+from sglang.srt.layers.moe import MoeRunner, MoeRunnerBackend, MoeRunnerConfig
+
+try:
+    from lmslim.layers.fused_moe.fuse_moe_w4a8_marlin import fused_experts_impl_w4a8_marlin
+except Exception:
+    print("INFO: Please install lmslim if you want to infer the quantitative model of moe.\n")
+
+
+class MarlinMoeWorkspace:
+    """
+    Singleton manager for device-specific workspace buffers used by w4a8 Marlin-MoE.
+    global_reduce_buffer will take 1.5MB * cus (about 120MB for BW200) memoery in each device
+    """
+    _instances = {}
+    def __new__(cls, device):
+        if device not in cls._instances:
+            instance = super().__new__(cls)
+            instance._initialized = False
+            cls._instances[device] = instance
+        return cls._instances[device]
+
+    def __init__(self, device):
+        if self._initialized:
+            return
+        sms = torch.cuda.get_device_properties(device).multi_processor_count
+        self.workspace = torch.zeros(
+            500, dtype=torch.int, device=device, requires_grad=False
+        )
+        self.global_reduce_buffer = torch.zeros(
+            sms * 6 * 128 * 512, dtype=torch.int, device=device, requires_grad=False
+        )
+        self._initialized = True
+
+    def get_buffers(self):
+        return self.workspace, self.global_reduce_buffer
+
+def baseline_scaled_mm(a: torch.Tensor,
+                      b: torch.Tensor,
+                      scale_a: torch.Tensor,
+                      scale_b: torch.Tensor,
+                      out_dtype: torch.dtype,
+                      bias: Optional[torch.Tensor] = None) -> torch.Tensor:
+
+    scales= scale_a* scale_b.T
+    gemmout= torch.mm(
+        a.to(dtype=torch.float32), b.to(dtype=torch.float32))
+    output = (scales *gemmout).to(out_dtype)
+    if bias is not None:
+        output = output + bias
+    return output.to(out_dtype)
+
+
+class SlimQuantW4A8Int8MarlinConfig(QuantizationConfig):
+    """Config class for W4A8 Int8 Quantization.
+    - Weight: static, per-channel, symmetric
+    - Activation: dynamic, per-token, symmetric
+    """
+
+    def __init__(self):
+        pass
+
+    @classmethod
+    def get_supported_act_dtypes(cls) -> List[torch.dtype]:
+        return [torch.float16, torch.bfloat16]
+
+    @classmethod
+    def get_min_capability(cls) -> int:
+        return 75
+
+    @classmethod
+    def get_name(self) -> str:
+        return "slimquant_w4a8_marlin"
+
+    @classmethod
+    def get_config_filenames(cls) -> List[str]:
+        return []
+
+    @classmethod
+    def from_config(cls, config: Dict[str, Any]) -> "SlimQuantW4A8Int8MarlinConfig":
+        return cls()
+    @classmethod
+    def override_quantization_method(
+            cls, hf_quant_cfg, user_quant) -> Optional[str]:
+        if hf_quant_cfg.get("quant_method") == "slimquant_w4a8" \
+                and user_quant == "slimquant_w4a8_marlin":
+            return cls.get_name()
+        return None
+    def get_quant_method(
+        self,
+        layer: torch.nn.Module,
+        prefix: str,
+    ) -> Optional["QuantizeMethodBase"]:
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+
+        if isinstance(layer, LinearBase):
+            return SlimQuantW4A8Int8LinearMethod(self)
+        elif isinstance(layer, FusedMoE):
+            return SlimQuantW4A8Int8MarlinMoEMethod(self)
+        return None
+
+    def get_scaled_act_names(self) -> List[str]:
+        return []
+
+
+class SlimQuantW4A8Int8MarlinMoEMethod:
+    """MoE method for W4A8INT8 Marlin.
+    Supports loading INT8 checkpoints with static weight scale and
+    dynamic/static activation scale.
+    Args:
+        quant_config: The quantization config.
+    """
+
+    def __new__(cls, *args, **kwargs):
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+
+        if not hasattr(cls, "_initialized"):
+            original_init = cls.__init__
+            new_cls = type(
+                cls.__name__,
+                (FusedMoEMethodBase,),
+                {
+                    "__init__": original_init,
+                    **{k: v for k, v in cls.__dict__.items() if k != "__dict__"},
+                },
+            )
+            obj = super(new_cls, new_cls).__new__(new_cls)
+            obj.__init__(*args, **kwargs)
+            return obj
+        return super().__new__(cls)
+
+    def __init__(self, quant_config):
+        self.quant_config = quant_config
+
+    def create_weights(
+        self,
+        layer: torch.nn.Module,
+        num_experts: int,
+        hidden_size: int,
+        intermediate_size_per_partition: int,
+        params_dtype: torch.dtype,
+        **extra_weight_attrs,
+    ):
+        from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+        tp_size = get_tensor_model_parallel_world_size()
+        intermediate_size = intermediate_size_per_partition
+        # WEIGHTS
+        w13_weight = torch.nn.Parameter(
+            torch.empty(
+                num_experts, 2 * intermediate_size, hidden_size//2, dtype=torch.int8
+            ),
+            requires_grad=False,
+        )
+        layer.register_parameter("w13_weight", w13_weight)
+        set_weight_attrs(w13_weight, extra_weight_attrs)
+
+        w2_weight = torch.nn.Parameter(
+            torch.empty(num_experts, hidden_size, intermediate_size//2, dtype=torch.int8),
+            requires_grad=False,
+        )
+        layer.register_parameter("w2_weight", w2_weight)
+        set_weight_attrs(w2_weight, extra_weight_attrs)
+
+        w13_weight_scale = torch.nn.Parameter(
+            torch.ones(num_experts, 2 * intermediate_size, 1, dtype=torch.float32),
+            requires_grad=False,
+        )
+        w2_weight_scale = torch.nn.Parameter(
+            torch.ones(num_experts, hidden_size, 1, dtype=torch.float32),
+            requires_grad=False,
+        )
+        layer.register_parameter("w13_weight_scale", w13_weight_scale)
+        layer.register_parameter("w2_weight_scale", w2_weight_scale)
+
+        extra_weight_attrs.update(
+            {"quant_method": FusedMoeWeightScaleSupported.CHANNEL.value}
+        )
+
+        set_weight_attrs(w13_weight_scale, extra_weight_attrs)
+        set_weight_attrs(w2_weight_scale, extra_weight_attrs)
+
+        w13_input_scale = None
+        layer.register_parameter("w13_input_scale", w13_input_scale)
+
+        w2_input_scale = None
+        layer.register_parameter("w2_input_scale", w2_input_scale)
+
+    def process_weights_after_loading(self, layer: torch.nn.Module) -> None:
+        layer.w13_weight_scale = Parameter(
+            layer.w13_weight_scale.data, requires_grad=False
+        )
+        layer.w2_weight_scale = Parameter(
+            layer.w2_weight_scale.data, requires_grad=False
+        )
+
+        layer.w13_weight = Parameter(w4a8_weight_repack_impl(layer.w13_weight), requires_grad=False)
+        layer.w2_weight = Parameter(w4a8_weight_repack_impl(layer.w2_weight), requires_grad=False)
+
+    def create_moe_runner(
+        self, layer: torch.nn.Module, moe_runner_config: MoeRunnerConfig
+    ):
+        self.moe_runner_config = moe_runner_config
+        self.runner = MoeRunner(MoeRunnerBackend.TRITON, moe_runner_config)
+
+
+    def apply(
+        self,
+        layer: torch.nn.Module,
+        dispatch_output: StandardDispatchOutput,
+    ) -> CombineInput:
+        x = dispatch_output.hidden_states
+        topk_output = dispatch_output.topk_output
+        from sglang.srt.layers.moe.topk import apply_topk_weights_cpu
+
+        topk_weights, topk_ids, _ = topk_output
+        x, topk_weights = apply_topk_weights_cpu(
+            self.moe_runner_config.apply_router_weight_on_input, topk_weights, x
+        )
+        workspace, global_reduce_buffer = MarlinMoeWorkspace(x.device).get_buffers()
+        output = fused_experts_impl_w4a8_marlin(
+            x,
+            layer.w13_weight,
+            layer.w2_weight,
+            topk_weights=topk_weights,
+            topk_ids=topk_ids,
+            workspace=workspace,
+            global_reduce_buffer=global_reduce_buffer,
+            inplace=True,
+            use_int4_w4a8=True,
+            per_channel_quant=True,
+            activation=layer.moe_runner_config.activation,
+            expert_map=layer.expert_map_gpu,
+            apply_router_weight_on_input=self.moe_runner_config.apply_router_weight_on_input,
+            global_num_experts=layer.moe_runner_config.num_experts,
+            w1_scale=(layer.w13_weight_scale),
+            w2_scale=(layer.w2_weight_scale),
+            a1_scale=layer.w13_input_scale,
+            a2_scale=layer.w2_input_scale,
+            use_nn_moe=False,
+        )
+        return StandardCombineInput(hidden_states=output)
+    # def _apply(
+    #     self,
+    #     layer: torch.nn.Module,
+    #     x: torch.Tensor,
+    #     router_logits: torch.Tensor,
+    #     top_k: int,
+    #     #renormalize: bool,
+    #     #use_grouped_topk: bool = False,
+    #     topk_group: Optional[int] = None,
+    #     num_expert_group: Optional[int] = None,
+    #     global_num_experts: int = -1,
+    #     expert_map: Optional[torch.Tensor] = None,
+    #     custom_routing_function: Optional[Callable] = None,
+    #     scoring_func: str = "softmax",
+    #     e_score_correction_bias: Optional[torch.Tensor] = None,
+    #     apply_router_weight_on_input: bool = False,
+    #     activation: str = "silu",
+    #     enable_eplb: bool = False,
+    #     use_nn_moe: Optional[bool] = False,
+    #     routed_scaling_factor: Optional[float] = None,
+    #     use_fused_gate: Optional[bool] = False,
+    #     **_  
+    # ) -> torch.Tensor:
+    #     from sglang.srt.layers.moe.fused_moe_triton import (FusedMoE, FusedMoeWeightScaleSupported)
+    #     from sglang.srt.layers.moe.fused_moe_triton.fused_moe import fused_experts
+    #     if enable_eplb:
+    #         raise NotImplementedError(
+    #             "EPLB not supported for `SlimQuantW4A8Int8MarlinMoEMethod` yet.")
+    #     # Expert selection
+    #     topk_weights, topk_ids = FusedMoE.select_experts(
+    #         hidden_states=x,
+    #         router_logits=router_logits,
+    #         #use_grouped_topk=use_grouped_topk,
+    #         top_k=top_k,
+    #         #renormalize=renormalize,
+    #         topk_group=topk_group,
+    #         num_expert_group=num_expert_group,
+    #         custom_routing_function=custom_routing_function,
+    #         scoring_func=scoring_func,
+    #         e_score_correction_bias=e_score_correction_bias,
+    #         routed_scaling_factor=routed_scaling_factor,
+    #         use_fused_gate=use_fused_gate
+    #     )
+    #     workspace, global_reduce_buffer = MarlinMoeWorkspace(x.device).get_buffers()
+    #     return fused_experts_impl_w4a8_marlin(
+    #         x,
+    #         layer.w13_weight,
+    #         layer.w2_weight,
+    #         topk_weights=topk_weights,
+    #         topk_ids=topk_ids,
+    #         workspace=workspace,
+    #         global_reduce_buffer=global_reduce_buffer,
+    #         inplace=True,
+    #         use_int4_w4a8=True,
+    #         per_channel_quant=True,
+    #         activation=activation,
+    #         expert_map=expert_map,
+    #         apply_router_weight_on_input=apply_router_weight_on_input,
+    #         global_num_experts=global_num_experts,
+    #         w1_scale=(layer.w13_weight_scale),
+    #         w2_scale=(layer.w2_weight_scale),
+    #         a1_scale=layer.w13_input_scale,
+    #         a2_scale=layer.w2_input_scale,
+    #         use_nn_moe=use_nn_moe,
+    #     )

python/sglang/srt/layers/quantization/w4a8_utils.py

@@ -0,0 +1,92 @@
+import torch
+import numpy as np
+
+try:
+    from lightop import awq_marlin_repack_w4a8
+    use_lightop = False
+except Exception:
+    use_lightop = False
+
+def unpack_int8_to_int4(tensor_int8: torch.Tensor) -> torch.Tensor:
+    """
+    将[N, K//2]大小的torch.int8 Tensor，转换为[N, K]大小的torch.int32 Tensor。
+    每个int8包含两个int4，分别提取到int32的低4位，其余位为0。
+
+    Args:
+        tensor_int8 (torch.Tensor): 输入张量，形状为[N, K//2]，类型为torch.int8。
+
+    Returns:
+        torch.Tensor: 输出张量，形状为[N, K]，类型为torch.int32。
+    """
+    if tensor_int8.dtype != torch.int8:
+        raise ValueError("Input tensor must be of type torch.int8")
+
+    N, K_half = tensor_int8.shape
+    tensor_uint8 = tensor_int8.to(torch.uint8)
+    high4 = tensor_uint8 & 0x0F
+    low4 = (tensor_uint8 >> 4) & 0x0F
+    unpacked = torch.empty((N, K_half * 2), dtype=torch.int32, device=tensor_int8.device)
+    unpacked[:, 0::2] = low4.to(torch.int32)
+    unpacked[:, 1::2] = high4.to(torch.int32)
+
+    return unpacked
+
+def get_weight_perms(interleave: bool=True):
+    perm = []
+    for i in range(64):
+
+        for col in range(4):
+            cur_col = (i % 16) * 4 + col
+            for row in range(8):
+                cur_row = (i // 16) * 8 + row
+                cur_idx =  cur_row * 64 + cur_col
+                perm.append(cur_idx)
+
+    perm = np.array(perm)
+    if interleave:
+        interleave = np.array([4, 0, 5, 1, 6, 2, 7, 3])
+        perm = perm.reshape((-1, 8))[:, interleave].ravel()
+
+    perm = torch.from_numpy(perm)
+
+    return perm
+
+def marlin_weights(q_w,weight_perm,k_tile=32,n_tile=64,pack_factor=8):
+    size_k, size_n = q_w.shape
+    q_w = q_w.reshape((size_k // k_tile, k_tile, size_n // n_tile, n_tile))
+    q_w = q_w.permute((0, 2, 1, 3))
+    q_w = q_w.reshape((size_k // k_tile, size_n * k_tile))
+    q_w = q_w.reshape((-1, weight_perm.numel()))[:, weight_perm].reshape(q_w.shape)
+
+    orig_device = q_w.device
+    q_w = q_w.contiguous().to(torch.int32)
+    M, N = q_w.shape
+    assert N % pack_factor == 0, f"size_n ({N}) must be divisible by pack_factor ({pack_factor})"
+    q_packed = torch.zeros((M, N // pack_factor), dtype=torch.int32, device=orig_device)
+    for i in range(pack_factor):
+        q_packed += q_w[:, i::pack_factor] << (4 * i)
+
+    return q_packed
+
+def w4a8_2_marlin_weight(w4a8_w):
+    full_w4a8_w = unpack_int8_to_int4(w4a8_w)
+    full_w4a8_w = full_w4a8_w.T
+    weight_perm = get_weight_perms()
+    marlin_q_w = marlin_weights(full_w4a8_w, weight_perm, k_tile=32, n_tile=64, pack_factor=8)
+    return marlin_q_w
+
+def w4a8_weight_repack_impl(input):
+    if use_lightop:
+        size_batch = input.shape[0]
+        size_n = input.shape[1]
+        size_k = input.shape[2] * 2
+        output = torch.zeros((size_batch, size_k // 32, size_n * 4), device=input.device, dtype=torch.int32)
+        awq_marlin_repack_w4a8(input, output, size_batch, size_k, size_n)
+    else:
+        w_marlin_list = []
+        for e in range(input.shape[0]):
+            w_marlin_in = w4a8_2_marlin_weight(input[e])
+            w_marlin_list.append(w_marlin_in)
+        output = torch.stack(w_marlin_list, dim=0)
+
+    return output

python/sglang/srt/model_executor/model_runner.py

@@ -516,7 +516,7 @@ class ModelRunner:
                 ):
                     server_args.attention_backend = "fa3"
                 elif _is_hip:
-                    server_args.attention_backend = "aiter"
+                    server_args.attention_backend = "triton"
                 elif _is_npu:
                     server_args.attention_backend = "ascend"
                 else:

python/sglang/srt/server_args.py

@@ -84,6 +84,7 @@ QUANTIZATION_CHOICES = [
     "qoq",
     "w4afp8",
     "mxfp4",
+    "slimquant_w4a8_marlin",
 ]
 
 ATTENTION_BACKEND_CHOICES = [

sgl-kernel/csrc/allreduce/custom_all_reduce_hip.cuh

@@ -165,10 +165,10 @@ DINLINE void start_sync(
   if (threadIdx.x < ngpus) {
     // simultaneously write to the corresponding flag of all ranks.
     // Latency = 1 p2p write
-    __scoped_atomic_store_n(
+    __hip_atomic_store(
-        &sg.signals[threadIdx.x]->start[blockIdx.x][rank], flag, __ATOMIC_RELAXED, __MEMORY_SCOPE_SYSTEM);
+        &sg.signals[threadIdx.x]->start[blockIdx.x][rank], flag, __ATOMIC_RELAXED, __HIP_MEMORY_SCOPE_SYSTEM);
     // wait until we got true from all ranks
-    while (__scoped_atomic_load_n(&self_sg->start[blockIdx.x][threadIdx.x], __ATOMIC_RELAXED, __MEMORY_SCOPE_DEVICE) <
+    while (__hip_atomic_load(&self_sg->start[blockIdx.x][threadIdx.x], __ATOMIC_RELAXED, __HIP_MEMORY_SCOPE_AGENT) <
            flag)
       ;
   }
@@ -211,16 +211,16 @@ DINLINE void end_sync(
   if (threadIdx.x < ngpus) {
     // simultaneously write to the corresponding flag of all ranks.
     // Latency = 1 p2p write
-    __scoped_atomic_store_n(
+    __hip_atomic_store(
         &sg.signals[threadIdx.x]->end[blockIdx.x][rank],
         flag,
         final_sync ? __ATOMIC_RELAXED : __ATOMIC_RELEASE,
-        __MEMORY_SCOPE_SYSTEM);
+        __HIP_MEMORY_SCOPE_SYSTEM);
     // wait until we got true from all ranks
-    while (__scoped_atomic_load_n(
+    while (__hip_atomic_load(
                &self_sg->end[blockIdx.x][threadIdx.x],
                final_sync ? __ATOMIC_RELAXED : __ATOMIC_ACQUIRE,
-               __MEMORY_SCOPE_DEVICE) < flag)
+                __HIP_MEMORY_SCOPE_AGENT) < flag)
       ;
   }
   __syncthreads();

sgl-kernel/csrc/moe/moe_align_kernel.cu

@@ -21,6 +21,7 @@ limitations under the License.
 
 #include "utils.h"
 
+#define WARP_SIZE 64
 #define VEC_SIZE 4
 using Vec = int4;
 
@@ -45,7 +46,7 @@ __device__ __forceinline__ int warp_exclusive_scan(int v, unsigned mask = 0xffff
   int original = v;
 #pragma unroll
   for (int offset = 1; offset < WARP_SIZE; offset <<= 1) {
-    int n = __shfl_up_sync(mask, v, offset);
+    int n = __shfl_up(v, offset);
     if ((threadIdx.x & (WARP_SIZE - 1)) >= offset) v += n;
   }
   return v - original;

sgl-kernel/csrc/moe/moe_topk_softmax_kernels.cu

@@ -60,7 +60,7 @@ template <typename T>
 __device__ float convert_to_float(T x) {
   if constexpr (std::is_same_v<T, __half>) {
     return __half2float(x);
-  } else if constexpr (std::is_same_v<T, __nv_bfloat16>) {
+  } else if constexpr (std::is_same_v<T, __hip_bfloat16>) {
     return __bfloat162float(x);
   } else if constexpr (std::is_same_v<T, float>) {
     return x;
@@ -575,8 +575,8 @@ void topk_softmax(
         renormalize,
         stream);
   } else if (dtype == at::ScalarType::BFloat16) {
-    topkGatingSoftmaxKernelLauncher<__nv_bfloat16>(
+    topkGatingSoftmaxKernelLauncher<__hip_bfloat16>(
-        reinterpret_cast<const __nv_bfloat16*>(gating_output.data_ptr<at::BFloat16>()),
+        reinterpret_cast<const __hip_bfloat16*>(gating_output.data_ptr<at::BFloat16>()),
         topk_weights.data_ptr<float>(),
         topk_indices.data_ptr<int>(),
         softmax_workspace.data_ptr<float>(),

sgl-kernel/include/utils.h

@@ -358,25 +358,25 @@ __device__ __forceinline__ dstDtype castFromFloat(float val) {
 #endif
 
 // add FP8 support
-#ifndef USE_ROCM
+// #ifndef USE_ROCM
-#include <c10/util/Float8_e4m3fn.h>
+// #include <c10/util/Float8_e4m3fn.h>
-using FP8_TYPE = c10::Float8_e4m3fn;
+// using FP8_TYPE = c10::Float8_e4m3fn;
-C10_HOST_DEVICE constexpr auto FP8_E4M3_MAX = std::numeric_limits<FP8_TYPE>::max();
+// C10_HOST_DEVICE constexpr auto FP8_E4M3_MAX = std::numeric_limits<FP8_TYPE>::max();
-#else  // USE_ROCM
+// #else  // USE_ROCM
-#if HIP_FP8_TYPE_FNUZ
+// #if HIP_FP8_TYPE_FNUZ
-#include <c10/util/Float8_e4m3fnuz.h>
+// #include <c10/util/Float8_e4m3fnuz.h>
-using FP8_TYPE = c10::Float8_e4m3fnuz;
+// using FP8_TYPE = c10::Float8_e4m3fnuz;
-constexpr auto FP8_E4M3_MAX = 224.0f;
+// constexpr auto FP8_E4M3_MAX = 224.0f;
-#else
+// #else
-#if HIP_FP8_TYPE_E4M3
+// #if HIP_FP8_TYPE_E4M3
-#include <c10/util/Float8_e4m3fn.h>
+// #include <c10/util/Float8_e4m3fn.h>
-using FP8_TYPE = c10::Float8_e4m3fn;
+// using FP8_TYPE = c10::Float8_e4m3fn;
-C10_HOST_DEVICE constexpr auto FP8_E4M3_MAX = std::numeric_limits<FP8_TYPE>::max();
+// C10_HOST_DEVICE constexpr auto FP8_E4M3_MAX = std::numeric_limits<FP8_TYPE>::max();
-#else
+// #else
-#error "fp8 is not supported in this processor (arch < gfx942)."
+// #error "fp8 is not supported in this processor (arch < gfx942)."
-#endif  // HIP_FP8_TYPE_E4M3
+// #endif  // HIP_FP8_TYPE_E4M3
-#endif  // HIP_FP8_TYPE_FNUZ
+// #endif  // HIP_FP8_TYPE_FNUZ
-#endif  // USE_ROCM
+// #endif  // USE_ROCM
 
 #define FULL_MASK 0xffffffff
 

sgl-kernel/setup_hip.py

@@ -0,0 +1,100 @@
+# Copyright 2025 SGLang Team. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ==============================================================================
+
+import platform
+import sys
+from pathlib import Path
+
+from setuptools import find_packages, setup
+from torch.utils.cpp_extension import BuildExtension, CUDAExtension
+
+root = Path(__file__).parent.resolve()
+arch = platform.machine().lower()
+
+
+def _get_version():
+    with open(root / "pyproject.toml") as f:
+        for line in f:
+            if line.startswith("version"):
+                return line.split("=")[1].strip().strip('"')
+
+
+operator_namespace = "sgl_kernel"
+include_dirs = [
+    root / "include",
+    root / "csrc",
+]
+
+sources = [
+    "csrc/allreduce/custom_all_reduce.hip",
+    "csrc/allreduce/quick_all_reduce.cu",
+    "csrc/common_extension_rocm.cc",
+    "csrc/elementwise/activation.cu",
+    "csrc/grammar/apply_token_bitmask_inplace_cuda.cu",
+    "csrc/moe/moe_align_kernel.cu",
+    "csrc/moe/moe_topk_softmax_kernels.cu",
+    "csrc/speculative/eagle_utils.cu",
+    "csrc/kvcacheio/transfer.cu",
+]
+
+cxx_flags = [
+    "-O3",
+    "-Wno-switch-bool",
+    "-Wno-macro-redefined",
+    "-Wno-deprecated-declarations",
+    "-w",
+]
+libraries = ["c10", "torch", "torch_python"]
+extra_link_args = ["-Wl,-rpath,$ORIGIN/../../torch/lib", f"-L/usr/lib/{arch}-linux-gnu"]
+
+hipcc_flags = [
+    "-fPIC",
+    "-O3",
+    "-std=c++17",
+    "-D__HIP_PLATFORM_HCC__=1",
+    "--offload-arch=gfx928",
+    "--offload-arch=gfx936",
+    "--gpu-max-threads-per-block=1024",
+    "-Wno-macro-redefined",
+    "-Wno-deprecated-declarations",
+    "-funroll-loops",
+    "-Rpass-analysis=unroll-loops",
+    "-w",
+]
+
+ext_modules = [
+    CUDAExtension(
+        name="sgl_kernel.common_ops",
+        sources=sources,
+        include_dirs=include_dirs,
+        extra_compile_args={
+            "nvcc": hipcc_flags,
+            "cxx": cxx_flags,
+        },
+        libraries=libraries,
+        extra_link_args=extra_link_args,
+        py_limited_api=False,
+    ),
+]
+
+setup(
+    name="sgl-kernel",
+    version=_get_version(),
+    packages=find_packages(where="python"),
+    package_dir={"": "python"},
+    ext_modules=ext_modules,
+    cmdclass={"build_ext": BuildExtension.with_options(use_ninja=True)},
+    options={"bdist_wheel": {"py_limited_api": "cp39"}},
+)