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This guide describes the best practice data for Qwen3-235B-A22B on the Ascend NPU.

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Low Latency

ModelHardwareCardsDeploy ModeDatasetTPOTQuantizationConfiguration
Qwen3-235B-A22BAtlas 800I A38PD Mixed11K+1.5K8msBF16Optimal Configuration

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High Throughput

ModelHardwareCardsDeploy ModeDatasetTPOTQuantizationConfiguration
Qwen3-235B-A22BAtlas 800I A38PD Mixed3.5K+1.5K50.1msW8A8 INT8Optimal Configuration

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Optimal Configuration

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Qwen3-235B-A22B BF16 8P IN11K OUT1K5 8ms

Model: Qwen3-235B-A22B Hardware: Atlas 800I A3 Cards: 8 Deploy Mode: PD Mixed Quantization: BF16 Dataset: 11K+1.5K TPOT: 8ms

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Model Deployment

Command
# ============================================================
# Before running, update the following variables:
#   MODEL_PATH: path to the model weights directory
#   DRAFT_MODEL_PATH: path to the draft model weights directory
#   HCCL_SOCKET_IFNAME: network interface name for HCCL
#   GLOO_SOCKET_IFNAME: network interface name for Gloo
# ============================================================

MODEL_PATH=/path/to/model-weights
DRAFT_MODEL_PATH=/path/to/draft-model-weights

echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
sysctl -w vm.swappiness=0
sysctl -w kernel.numa_balancing=0
sysctl -w kernel.sched_migration_cost_ns=50000

unset https_proxy
unset http_proxy
unset HTTPS_PROXY
unset HTTP_PROXY
unset ASCEND_LAUNCH_BLOCKING

source /usr/local/Ascend/ascend-toolkit/set_env.sh
source /usr/local/Ascend/nnal/atb/set_env.sh

export GLOO_SOCKET_IFNAME=<network-interface>
export HCCL_BUFFSIZE=1600
export HCCL_OP_EXPANSION_MODE=AIV
export HCCL_SOCKET_IFNAME=<network-interface>
export PYTORCH_NPU_ALLOC_CONF=expandable_segments:True
export SGLANG_DISAGGREGATION_BOOTSTRAP_TIMEOUT=600
export SGLANG_ENABLE_OVERLAP_PLAN_STREAM=1
export SGLANG_ENABLE_SPEC_V2=1

python3 -m sglang.launch_server \
    --model-path $MODEL_PATH \
    --host 127.0.0.1 --port 6688 \
    --trust-remote-code \
    --nnodes 1 \
    --node-rank 0 \
    --attention-backend ascend \
    --device npu \
    --max-running-requests 1 \
    --dtype bfloat16 \
    --chunked-prefill-size -1 \
    --max-prefill-tokens 16384 \
    --speculative-draft-model-quantization unquant \
    --speculative-algorithm EAGLE3 \
    --speculative-draft-model-path $DRAFT_MODEL_PATH \
    --speculative-num-steps 4 \
    --speculative-eagle-topk 1 \
    --speculative-num-draft-tokens 5 \
    --disable-radix-cache \
    --enable-dp-lm-head \
    --tp 16 \
    --mem-fraction-static 0.78 \
    --cuda-graph-bs 1

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Benchmark

We tested it based on the RANDOM dataset.
Command
python -m sglang.bench_serving \
    --dataset-name random \
    --backend sglang \
    --host 127.0.0.1 \
    --port 6688 \
    --max-concurrency 1 \
    --random-input-len 11000 \
    --random-output-len 1500 \
    --num-prompts 1 \
    --random-range-ratio 1

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Qwen3-235B-A22B W8A8 8P IN3K5 OUT1K5 50.1ms

Model: Qwen3-235B-A22B Hardware: Atlas 800I A3 Cards: 8 Deploy Mode: PD Mixed Quantization: W8A8 INT8 Dataset: 3.5K+1.5K TPOT: 50.1ms

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Model Deployment

Command
# ============================================================
# Before running, update the following variables:
#   MODEL_PATH: path to the model weights directory
#   DRAFT_MODEL_PATH: path to the draft model weights directory
#   HCCL_SOCKET_IFNAME: network interface name for HCCL
#   GLOO_SOCKET_IFNAME: network interface name for Gloo
# ============================================================

MODEL_PATH=/path/to/model-weights
DRAFT_MODEL_PATH=/path/to/draft-model-weights

echo performance | tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
sysctl -w vm.swappiness=0
sysctl -w kernel.numa_balancing=0
sysctl -w kernel.sched_migration_cost_ns=50000

unset https_proxy
unset http_proxy
unset HTTPS_PROXY
unset HTTP_PROXY
unset ASCEND_LAUNCH_BLOCKING

source /usr/local/Ascend/ascend-toolkit/set_env.sh
source /usr/local/Ascend/nnal/atb/set_env.sh

export GLOO_SOCKET_IFNAME=<network-interface>
export HCCL_BUFFSIZE=570
export HCCL_OP_EXPANSION_MODE=AIV
export HCCL_SOCKET_IFNAME=<network-interface>
export PYTORCH_NPU_ALLOC_CONF=expandable_segments:True
export SGLANG_DEEPEP_NUM_MAX_DISPATCH_TOKENS_PER_RANK=188416
export SGLANG_DISAGGREGATION_BOOTSTRAP_TIMEOUT=600
export SGLANG_ENABLE_OVERLAP_PLAN_STREAM=1
export SGLANG_ENABLE_SPEC_V2=1
export SGLANG_NPU_FUSED_MOE_MODE=2
export SGLANG_NPU_PROFILING=0
export SGLANG_NPU_PROFILING_BS=27
export SGLANG_PREFILL_DELAYER_MAX_DELAY_PASSES=100
export SGLANG_SCHEDULER_DECREASE_PREFILL_IDLE=1

python3 -m sglang.launch_server \
    --model-path $MODEL_PATH \
    --host 127.0.0.1 --port 6688 \
    --trust-remote-code \
    --nnodes 1 \
    --node-rank 0 \
    --attention-backend ascend \
    --device npu \
    --quantization modelslim \
    --max-running-requests 432 \
    --context-length 8192 \
    --dtype bfloat16 \
    --chunked-prefill-size 94208 \
    --max-prefill-tokens 458880 \
    --sampling-backend ascend \
    --ep-dispatch-algorithm static \
    --init-expert-location /root/.cache/modelscope/hub/models/hot_map/235B_3_5k_decode.pt \
    --disable-radix-cache \
    --moe-a2a-backend ascend_fuseep \
    --speculative-algorithm EAGLE3 \
    --speculative-draft-model-path $DRAFT_MODEL_PATH \
    --speculative-num-steps 3 \
    --speculative-eagle-topk 1 \
    --speculative-num-draft-tokens 4 \
    --speculative-draft-model-quantization unquant \
    --tp 16 \
    --dp-size 16 \
    --enable-dp-attention \
    --enable-dp-lm-head \
    --mem-fraction-static 0.8 \
    --cuda-graph-bs 1 2 4 8 16 20 24 26 27

​
Benchmark

We tested it based on the RANDOM dataset.
Command
python -m sglang.bench_serving \
    --dataset-name random \
    --backend sglang \
    --host 127.0.0.1 \
    --port 6688 \
    --max-concurrency 432 \
    --random-input-len 3500 \
    --random-output-len 1500 \
    --num-prompts 1728 \
    --random-range-ratio 1