adaptation w4A8 quantization

(cherry picked from commit 848c5b82)

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)
\ No newline at end of file

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

@@ -16,6 +16,7 @@ from lmslim.layers.gemm.int8_utils import (
     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
 
@@ -343,6 +344,12 @@ class SlimQuantW4A8Int8MoEMethod:
             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,

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

 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
@@ -9,6 +11,7 @@ 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
@@ -146,13 +149,13 @@ class SlimQuantW4A8Int8MarlinMoEMethod:
         layer: torch.nn.Module,
         num_experts: int,
         hidden_size: int,
-        intermediate_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(
@@ -205,51 +208,28 @@ class SlimQuantW4A8Int8MarlinMoEMethod:
         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,
-        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
+        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()
-        return fused_experts_impl_w4a8_marlin(
+        output = fused_experts_impl_w4a8_marlin(
             x,
             layer.w13_weight,
             layer.w2_weight,
@@ -260,13 +240,79 @@ class SlimQuantW4A8Int8MarlinMoEMethod:
             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,
+            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=use_nn_moe,
+            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,
+    #     )