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perf: Avoid unnecessary data type conversions for DeepSeek-V3 on Blackwell (#9834)

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Signed-off-by: Jinyang Yuan <154768711+jinyangyuan-nvidia@users.noreply.github.com>
This commit is contained in:
Jinyang Yuan
2025-09-06 14:06:46 +08:00
committed by GitHub
parent 90dfe3de4c
commit 012584ecd5
2 changed files with 13 additions and 4 deletions
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3
python/sglang/srt/entrypoints/engine.py
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@@ -655,7 +655,8 @@ def _set_envs_and_config(server_args: ServerArgs):
os.environ["CUDA_DEVICE_MAX_CONNECTIONS"] = "4"
os.environ["CUDA_MODULE_LOADING"] = "AUTO"
# flashinfer uses this environment variable for various kernels from MoE to quant kernels
os.environ["TRTLLM_ENABLE_PDL"] = "1"
if os.environ.get("TRTLLM_ENABLE_PDL", "1") != "0":
os.environ["TRTLLM_ENABLE_PDL"] = "1"
# Can also be passed as argument
os.environ["SGLANG_RUN_ID"] = (

14
python/sglang/srt/models/deepseek_v2.py
View File

@@ -67,7 +67,10 @@ from sglang.srt.layers.moe import (
should_use_flashinfer_cutlass_moe_fp4_allgather,
)
from sglang.srt.layers.moe.ep_moe.layer import DeepEPMoE, get_moe_impl_class
from sglang.srt.layers.moe.fused_moe_triton.layer import FusedMoE
from sglang.srt.layers.moe.fused_moe_triton.layer import (
FusedMoE,
_is_fp4_quantization_enabled,
)
from sglang.srt.layers.moe.topk import TopK
from sglang.srt.layers.quantization import deep_gemm_wrapper
from sglang.srt.layers.quantization.base_config import QuantizationConfig
@@ -299,7 +302,9 @@ class MoEGate(nn.Module):
and _device_sm >= 90
):
# router gemm output float32
logits = dsv3_router_gemm(hidden_states, self.weight)
logits = dsv3_router_gemm(
hidden_states, self.weight, out_dtype=torch.float32
)
elif _use_aiter_gfx95 and hidden_states.shape[0] <= 256:
logits = aiter_dsv3_router_gemm(
hidden_states, self.weight, gemm_output_zero_allocator
@@ -364,6 +369,9 @@ class DeepseekV2MoE(nn.Module):
prefix=add_prefix("experts", prefix),
)
correction_bias = self.gate.e_score_correction_bias
if _is_fp4_quantization_enabled():
correction_bias = correction_bias.to(torch.bfloat16)
self.topk = TopK(
top_k=config.num_experts_per_tok + self.num_fused_shared_experts,
renormalize=config.norm_topk_prob,
@@ -371,7 +379,7 @@ class DeepseekV2MoE(nn.Module):
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,
correction_bias=correction_bias,
routed_scaling_factor=self.routed_scaling_factor,
apply_routed_scaling_factor_on_output=self.experts.should_fuse_routed_scaling_factor_in_topk(),
force_topk=quant_config is None,