Set `num_fused_shared_experts` as `num_shared_experts` when shared_experts...

Set `num_fused_shared_experts` as `num_shared_experts` when shared_experts fusion is not disabled (#6736)

benchmark/kernels/fused_moe_triton/tuning_fused_moe_triton.py

@@ -400,7 +400,7 @@ def main(args: argparse.Namespace):
         shard_intermediate_size = 2 * intermediate_size // args.tp_size
     elif config.architectures[0] in ["DeepseekV2ForCausalLM", "DeepseekV3ForCausalLM"]:
         E = (
-            config.n_routed_experts + 1
+            config.n_routed_experts + (0 if args.disable_shared_experts_fusion else 1)
             if config.architectures[0] in ["DeepseekV3ForCausalLM"]
             else config.n_routed_experts
         )
@@ -408,7 +408,9 @@ def main(args: argparse.Namespace):
         intermediate_size = config.moe_intermediate_size
         shard_intermediate_size = 2 * intermediate_size // args.tp_size
     elif config.architectures[0] == "Llama4ForConditionalGeneration":
-        E = config.text_config.num_local_experts + 1
+        E = config.text_config.num_local_experts + (
+            0 if args.disable_shared_experts_fusion else 1
+        )
         topk = config.text_config.num_experts_per_tok
         intermediate_size = config.text_config.intermediate_size
         shard_intermediate_size = 2 * intermediate_size // args.tp_size
@@ -558,7 +560,7 @@ if __name__ == "__main__":
     parser.add_argument(
         "--model", type=str, default="mistralai/Mixtral-8x7B-Instruct-v0.1"
     )
-    parser.add_argument("--tp-size", "-tp", type=int, default=2)
+    parser.add_argument("--tp-size", "--tp", type=int, default=2)
     parser.add_argument(
         "--dtype",
         type=str,
@@ -568,6 +570,7 @@ if __name__ == "__main__":
     parser.add_argument("--seed", type=int, default=0)
     parser.add_argument("--batch-size", type=int, required=False)
     parser.add_argument("--tune", action="store_true")
+    parser.add_argument("--disable-shared-experts-fusion", action="store_true")
     args = parser.parse_args()
 
     main(args)

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

@@ -156,6 +156,7 @@ class EPMoE(torch.nn.Module):
         renormalize: bool = True,
         use_grouped_topk: bool = False,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         topk_group: Optional[int] = None,
         quant_config: Optional[QuantizationConfig] = None,
         tp_size: Optional[int] = None,
@@ -190,6 +191,7 @@ class EPMoE(torch.nn.Module):
         if self.use_grouped_topk:
             assert num_expert_group is not None and topk_group is not None
         self.num_expert_group = num_expert_group
+        self.num_fused_shared_experts = num_fused_shared_experts
         self.topk_group = topk_group
         self.correction_bias = correction_bias
         self.custom_routing_function = custom_routing_function
@@ -250,6 +252,7 @@ class EPMoE(torch.nn.Module):
             renormalize=self.renormalize,
             topk_group=self.topk_group,
             num_expert_group=self.num_expert_group,
+            num_fused_shared_experts=self.num_fused_shared_experts,
             correction_bias=self.correction_bias,
             custom_routing_function=self.custom_routing_function,
             routed_scaling_factor=self.routed_scaling_factor,

python/sglang/srt/layers/moe/fused_moe_native.py

@@ -21,6 +21,7 @@ def fused_moe_forward_native(
     renormalize: bool,
     topk_group: Optional[int] = None,
     num_expert_group: Optional[int] = None,
+    num_fused_shared_experts: int = 0,
     custom_routing_function: Optional[Callable] = None,
     correction_bias: Optional[torch.Tensor] = None,
     activation: str = "silu",
@@ -41,6 +42,7 @@ def fused_moe_forward_native(
         renormalize=renormalize,
         topk_group=topk_group,
         num_expert_group=num_expert_group,
+        num_fused_shared_experts=num_fused_shared_experts,
         custom_routing_function=custom_routing_function,
         correction_bias=correction_bias,
         routed_scaling_factor=routed_scaling_factor,
@@ -71,6 +73,7 @@ def moe_forward_native(
     renormalize: bool,
     topk_group: Optional[int] = None,
     num_expert_group: Optional[int] = None,
+    num_fused_shared_experts: int = 0,
     custom_routing_function: Optional[Callable] = None,
     correction_bias: Optional[torch.Tensor] = None,
     activation: str = "silu",
@@ -84,6 +87,7 @@ def moe_forward_native(
         renormalize=renormalize,
         topk_group=topk_group,
         num_expert_group=num_expert_group,
+        num_fused_shared_experts=num_fused_shared_experts,
         custom_routing_function=custom_routing_function,
         correction_bias=correction_bias,
         torch_native=True,

python/sglang/srt/layers/moe/fused_moe_triton/configs/E=257,N=128,device_name=NVIDIA_H100_80GB_HBM3,dtype=fp8_w8a8,block_shape=[128, 128].json

+{
+    "1": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 64,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "2": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "4": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "8": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "16": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "24": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "32": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "48": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "64": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "96": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "128": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "256": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "512": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "1024": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "1536": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "2048": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "3072": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "4096": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 4
+    }
+}

python/sglang/srt/layers/moe/fused_moe_triton/configs/E=257,N=256,device_name=NVIDIA_H200,dtype=fp8_w8a8,block_shape=[128, 128].json

+{
+    "1": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "2": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "4": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "8": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "16": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "24": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "32": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 5
+    },
+    "48": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 1,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "64": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 64,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "96": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "128": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "256": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "512": {
+        "BLOCK_SIZE_M": 16,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 3
+    },
+    "1024": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "1536": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "2048": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 32,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "3072": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 4
+    },
+    "4096": {
+        "BLOCK_SIZE_M": 64,
+        "BLOCK_SIZE_N": 128,
+        "BLOCK_SIZE_K": 128,
+        "GROUP_SIZE_M": 16,
+        "num_warps": 4,
+        "num_stages": 4
+    }
+}

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

@@ -1540,6 +1540,7 @@ def fused_moe(
     activation: str = "silu",
     use_grouped_topk: bool = False,
     num_expert_group: Optional[int] = None,
+    num_fused_shared_experts: int = 0,
     topk_group: Optional[int] = None,
     custom_routing_function: Optional[Callable] = None,
     use_fp8_w8a8: bool = False,
@@ -1609,6 +1610,7 @@ def fused_moe(
         renormalize=renormalize,
         topk_group=topk_group,
         num_expert_group=num_expert_group,
+        num_fused_shared_experts=num_fused_shared_experts,
         custom_routing_function=custom_routing_function,
         routed_scaling_factor=routed_scaling_factor,
     )

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

@@ -127,6 +127,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
         use_grouped_topk: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -144,6 +145,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
             use_grouped_topk=use_grouped_topk,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             activation=activation,
@@ -163,6 +165,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
         renormalize: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -179,6 +182,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,
@@ -232,6 +236,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
         renormalize: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         inplace: bool = True,
@@ -245,6 +250,7 @@ class UnquantizedFusedMoEMethod(FusedMoEMethodBase, CustomOp):
             renormalize,
             topk_group,
             num_expert_group,
+            num_fused_shared_experts,
             custom_routing_function,
             correction_bias,
         )
@@ -289,6 +295,7 @@ class FusedMoE(torch.nn.Module):
         renormalize: bool = True,
         use_grouped_topk: bool = False,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         topk_group: Optional[int] = None,
         quant_config: Optional[QuantizationConfig] = None,
         tp_size: Optional[int] = None,
@@ -321,6 +328,7 @@ class FusedMoE(torch.nn.Module):
         if self.use_grouped_topk:
             assert num_expert_group is not None and topk_group is not None
         self.num_expert_group = num_expert_group
+        self.num_fused_shared_experts = num_fused_shared_experts
         self.topk_group = topk_group
         self.custom_routing_function = custom_routing_function
         self.correction_bias = correction_bias
@@ -651,6 +659,7 @@ class FusedMoE(torch.nn.Module):
             use_grouped_topk=self.use_grouped_topk,
             topk_group=self.topk_group,
             num_expert_group=self.num_expert_group,
+            num_fused_shared_experts=self.num_fused_shared_experts,
             custom_routing_function=self.custom_routing_function,
             correction_bias=self.correction_bias,
             activation=self.activation,

python/sglang/srt/layers/moe/topk.py

@@ -303,6 +303,7 @@ def select_experts(
     renormalize: bool,
     topk_group: Optional[int] = None,
     num_expert_group: Optional[int] = None,
+    num_fused_shared_experts: int = 0,
     custom_routing_function: Optional[Callable] = None,
     correction_bias: Optional[torch.Tensor] = None,
     torch_native: bool = False,
@@ -310,7 +311,6 @@ def select_experts(
     num_token_non_padded: Optional[torch.Tensor] = None,
     expert_location_dispatch_info: Optional[ExpertLocationDispatchInfo] = None,
 ):
-    num_fused_shared_experts = global_server_args_dict["num_fused_shared_experts"]
 
     router_logits, correction_bias = (
         expert_location_dispatch.transform_select_experts_inputs(

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

@@ -289,6 +289,7 @@ def monkey_patch_moe_apply(class_obj: "FusedMoEMethodBase"):
         use_grouped_topk: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",

python/sglang/srt/layers/quantization/blockwise_int8.py

@@ -367,6 +367,7 @@ class BlockInt8MoEMethod:
         use_grouped_topk: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -387,6 +388,7 @@ class BlockInt8MoEMethod:
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,

python/sglang/srt/layers/quantization/compressed_tensors/compressed_tensors_moe.py

@@ -272,6 +272,7 @@ class CompressedTensorsW8A8Fp8MoEMethod(CompressedTensorsMoEMethod):
         use_grouped_topk: bool = False,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         global_num_experts: int = -1,
         expert_map: Optional[torch.Tensor] = None,
         custom_routing_function: Optional[Callable] = None,
@@ -294,6 +295,7 @@ class CompressedTensorsW8A8Fp8MoEMethod(CompressedTensorsMoEMethod):
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,
@@ -627,6 +629,7 @@ class CompressedTensorsWNA16MoEMethod(CompressedTensorsMoEMethod):
         use_grouped_topk: bool = False,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         global_num_experts: int = -1,
         expert_map: Optional[torch.Tensor] = None,
         custom_routing_function: Optional[Callable] = None,
@@ -651,6 +654,7 @@ class CompressedTensorsWNA16MoEMethod(CompressedTensorsMoEMethod):
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             scoring_func=scoring_func,
             correction_bias=correction_bias,

python/sglang/srt/layers/quantization/fp8.py

@@ -937,6 +937,7 @@ class Fp8MoEMethod:
         use_grouped_topk: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -957,6 +958,7 @@ class Fp8MoEMethod:
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,

python/sglang/srt/layers/quantization/moe_wna16.py

@@ -341,6 +341,7 @@ class MoeWNA16Method:
         use_grouped_topk: bool = False,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -362,6 +363,7 @@ class MoeWNA16Method:
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,

python/sglang/srt/layers/quantization/w8a8_fp8.py

@@ -287,6 +287,7 @@ class W8A8FP8MoEMethod:
         use_grouped_topk: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -306,6 +307,7 @@ class W8A8FP8MoEMethod:
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,

python/sglang/srt/layers/quantization/w8a8_int8.py

@@ -225,6 +225,7 @@ class W8A8Int8MoEMethod:
         use_grouped_topk: bool,
         topk_group: Optional[int] = None,
         num_expert_group: Optional[int] = None,
+        num_fused_shared_experts: int = 0,
         custom_routing_function: Optional[Callable] = None,
         correction_bias: Optional[torch.Tensor] = None,
         activation: str = "silu",
@@ -245,6 +246,7 @@ class W8A8Int8MoEMethod:
             renormalize=renormalize,
             topk_group=topk_group,
             num_expert_group=num_expert_group,
+            num_fused_shared_experts=num_fused_shared_experts,
             custom_routing_function=custom_routing_function,
             correction_bias=correction_bias,
             routed_scaling_factor=routed_scaling_factor,

python/sglang/srt/managers/schedule_batch.py

@@ -89,7 +89,7 @@ global_server_args_dict = {
     "max_micro_batch_size": ServerArgs.max_micro_batch_size,
     "moe_dense_tp_size": ServerArgs.moe_dense_tp_size,
     "ep_dispatch_algorithm": ServerArgs.ep_dispatch_algorithm,
-    "num_fused_shared_experts": ServerArgs.num_fused_shared_experts,
+    "disable_shared_experts_fusion": ServerArgs.disable_shared_experts_fusion,
     "sampling_backend": ServerArgs.sampling_backend,
     "speculative_accept_threshold_acc": ServerArgs.speculative_accept_threshold_acc,
     "speculative_accept_threshold_single": ServerArgs.speculative_accept_threshold_single,

python/sglang/srt/model_executor/model_runner.py

@@ -204,7 +204,7 @@ class ModelRunner:
                 "flashinfer_mla_disable_ragged": server_args.flashinfer_mla_disable_ragged,
                 "moe_dense_tp_size": server_args.moe_dense_tp_size,
                 "ep_dispatch_algorithm": server_args.ep_dispatch_algorithm,
-                "num_fused_shared_experts": server_args.num_fused_shared_experts,
+                "disable_shared_experts_fusion": server_args.disable_shared_experts_fusion,
                 "triton_attention_reduce_in_fp32": server_args.triton_attention_reduce_in_fp32,
                 "torchao_config": server_args.torchao_config,
                 "sampling_backend": server_args.sampling_backend,

python/sglang/srt/models/deepseek_v2.py

@@ -224,9 +224,11 @@ class DeepseekV2MoE(nn.Module):
         self.tp_size = get_tensor_model_parallel_world_size()
         self.routed_scaling_factor = config.routed_scaling_factor
         self.n_shared_experts = config.n_shared_experts
-        self.num_fused_shared_experts = global_server_args_dict[
-            "num_fused_shared_experts"
-        ]
+        self.num_fused_shared_experts = (
+            0
+            if global_server_args_dict["disable_shared_experts_fusion"]
+            else config.n_shared_experts
+        )
         self.config = config
         self.layer_id = layer_id
 
@@ -248,7 +250,7 @@ class DeepseekV2MoE(nn.Module):
             num_experts=config.n_routed_experts
             + self.num_fused_shared_experts
             + global_server_args_dict["ep_num_redundant_experts"],
-            top_k=config.num_experts_per_tok + min(self.num_fused_shared_experts, 1),
+            top_k=config.num_experts_per_tok + self.num_fused_shared_experts,
             hidden_size=config.hidden_size,
             intermediate_size=config.moe_intermediate_size,
             layer_id=self.layer_id,
@@ -256,6 +258,7 @@ class DeepseekV2MoE(nn.Module):
             quant_config=quant_config,
             use_grouped_topk=True,
             num_expert_group=config.n_group,
+            num_fused_shared_experts=self.num_fused_shared_experts,
             topk_group=config.topk_group,
             correction_bias=self.gate.e_score_correction_bias,
             routed_scaling_factor=self.routed_scaling_factor,
@@ -363,6 +366,7 @@ class DeepseekV2MoE(nn.Module):
                 renormalize=self.renormalize,
                 topk_group=self.topk_group,
                 num_expert_group=self.num_expert_group,
+                num_fused_shared_experts=self.num_fused_shared_experts,
                 correction_bias=self.correction_bias,
                 routed_scaling_factor=self.routed_scaling_factor,
                 num_token_non_padded=forward_batch.num_token_non_padded,
@@ -456,6 +460,7 @@ class DeepseekV2MoE(nn.Module):
                 renormalize=self.renormalize,
                 topk_group=self.topk_group,
                 num_expert_group=self.num_expert_group,
+                num_fused_shared_experts=self.num_fused_shared_experts,
                 correction_bias=self.correction_bias,
                 routed_scaling_factor=self.routed_scaling_factor,
                 num_token_non_padded=state.forward_batch.num_token_non_padded,
@@ -1679,9 +1684,11 @@ class DeepseekV2ForCausalLM(nn.Module):
     def determine_num_fused_shared_experts(
         self, architecture: str = "DeepseekV3ForCausalLM"
     ):
-        self.num_fused_shared_experts = global_server_args_dict[
-            "num_fused_shared_experts"
-        ]
+        self.num_fused_shared_experts = (
+            0
+            if global_server_args_dict["disable_shared_experts_fusion"]
+            else self.config.n_shared_experts
+        )
         if self.num_fused_shared_experts > 0:
             # Only Deepseek V3/R1 can use shared experts fusion optimization now.
             if (
@@ -1690,15 +1697,11 @@ class DeepseekV2ForCausalLM(nn.Module):
                 or self.config.n_routed_experts != 256
             ):
                 self.num_fused_shared_experts = 0
-                global_server_args_dict["num_fused_shared_experts"] = 0
+                global_server_args_dict["disable_shared_experts_fusion"] = 1
                 log_info_on_rank0(
                     logger,
                     "Only Deepseek V3/R1 on NV-platform can use shared experts fusion optimization. Shared experts fusion optimization is disabled.",
                 )
-            else:
-                assert (
-                    self.num_fused_shared_experts == self.tp_size
-                ), f"Shared experts fusion optimization is enabled in DeepSeek V3/R1, set it to {self.tp_size} can get best optimized performance."
         elif self.num_fused_shared_experts == 0:
             if (
                 _is_cuda
@@ -1707,8 +1710,8 @@ class DeepseekV2ForCausalLM(nn.Module):
                 and self.config.n_routed_experts == 256
                 and (not global_server_args_dict["enable_deepep_moe"])
             ):
-                self.num_fused_shared_experts = self.tp_size
-                global_server_args_dict["num_fused_shared_experts"] = self.tp_size
+                self.num_fused_shared_experts = self.config.n_shared_experts
+                global_server_args_dict["disable_shared_experts_fusion"] = 0
                 log_info_on_rank0(
                     logger,
                     "Deepseek V3/R1 with fp8 can use shared experts fusion optimization when SM version >=90. Shared experts fusion optimization is enabled.",
@@ -1910,6 +1913,7 @@ class DeepseekV2ForCausalLM(nn.Module):
             ("gate_up_proj", "up_proj", 1),
         ]
         if self.num_fused_shared_experts > 0:
+            assert self.num_fused_shared_experts == 1
             weights_list = list(weights)
             weights_dict = dict(weights_list)
             if self.quant_config is not None:
@@ -1971,22 +1975,21 @@ class DeepseekV2ForCausalLM(nn.Module):
             for moe_layer in tqdm(
                 moe_layers,
                 desc=f"Cloning {self.num_fused_shared_experts} "
-                "replicas of the shared expert into MoE",
+                "shared expert into MoE",
             ):
                 for suffix in suffix_list:
                     shared_expert_weight_name = (
                         f"model.layers.{moe_layer}.mlp.shared_experts.{suffix}"
                     )
-                    for num_repeat in range(self.num_fused_shared_experts):
-                        weights_list.append(
-                            (
-                                f"model.layers.{moe_layer}."
-                                f"mlp.experts."
-                                f"{self.config.n_routed_experts + num_repeat}"
-                                f".{suffix}",
-                                weights_dict[shared_expert_weight_name],
-                            )
+                    weights_list.append(
+                        (
+                            f"model.layers.{moe_layer}."
+                            f"mlp.experts."
+                            f"{self.config.n_routed_experts + 0}"
+                            f".{suffix}",
+                            weights_dict[shared_expert_weight_name],
                         )
+                    )
                     names_to_remove += [shared_expert_weight_name]
             weights = [w for w in weights_list if w[0] not in names_to_remove]
 

python/sglang/srt/server_args.py

@@ -207,7 +207,7 @@ class ServerArgs:
     flashinfer_mla_disable_ragged: bool = False
     warmups: Optional[str] = None
     moe_dense_tp_size: Optional[int] = None
-    num_fused_shared_experts: int = 0
+    disable_shared_experts_fusion: bool = False
     disable_chunked_prefix_cache: bool = False
     disable_fast_image_processor: bool = False
     mm_attention_backend: Optional[str] = None
@@ -1384,13 +1384,10 @@ class ServerArgs:
             default=ServerArgs.deepep_config,
             help="Tuned DeepEP config suitable for your own cluster. It can be either a string with JSON content or a file path.",
         )
-
         parser.add_argument(
-            "--num-fused-shared-experts",
-            type=int,
-            default=0,
-            help="The number of shared_experts need to be replicated to fuse with normal experts in deepseek v3/r1, "
-            "set it to tp_size can get best optimized performance. Note that for architectures with SM==90, we have enabled the shared experts fusion optimization by default for DeepSeek V3/R1, with num_fused_shared_experts automatically set to the TP size.",
+            "--disable-shared-experts-fusion",
+            action="store_true",
+            help="Disable shared experts fusion optimization for deepseek v3/r1.",
         )
         parser.add_argument(
             "--disable-chunked-prefix-cache",

sgl-kernel/csrc/moe/moe_fused_gate.cu

@@ -68,7 +68,7 @@ __device__ void moe_fused_gate_impl(
   }
 
   // Calculate topk_excluding_share_expert_fusion from topk
-  int64_t topk_excluding_share_expert_fusion = topk - (num_fused_shared_experts > 0 ? 1 : 0);
+  int64_t topk_excluding_share_expert_fusion = topk - num_fused_shared_experts;
 
   // Cast pointers to type T:
   auto* input_ptr = reinterpret_cast<T*>(input);
@@ -224,13 +224,21 @@ __device__ void moe_fused_gate_impl(
 
   if (thread_group_idx == 0 && num_fused_shared_experts > 0) {
     int64_t last_idx = topk * thread_row + topk_excluding_share_expert_fusion;
-
-    // Use round-robin to select expert
-    int64_t expert_offset = thread_row % num_fused_shared_experts;
+    int64_t expert_offset = 0;
     indices_ptr[last_idx] = static_cast<int32_t>(params.NUM_EXPERTS + expert_offset);
 
     // Set the weight to the sum of all weights divided by routed_scaling_factor
     output_ptr[last_idx] = output_sum / routed_scaling_factor;
+
+    if (num_fused_shared_experts > 1) {
+      for (int i = 1; i < num_fused_shared_experts; ++i) {
+        ++last_idx;
+        ++expert_offset;
+        indices_ptr[last_idx] = static_cast<int32_t>(params.NUM_EXPERTS + expert_offset);
+        // Set the weight to the sum of all weights divided by routed_scaling_factor
+        output_ptr[last_idx] = output_sum / routed_scaling_factor;
+      }
+    }
   }
   __syncthreads();