| Align the Inference results of the verl and vLLM frameworks on Ascend devices(zh) |
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| 在昇腾设备上对齐verl和vLLM两个框架下的推理结果。 |
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| Last updated: 11/17/2025. |
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| 这是一份在昇腾设备上对齐verl和vLLM两个框架下推理结果的教程。 |
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| 环境变量配置 |
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| 在多卡通信情况下： |
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| - HCCL通信下(默认场景): |
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| - export CLOSE_MATMUL_K_SHIFT=1 |
| - export ATB_MATMUL_SHUFFLE_K_ENABLE=0 |
| - export HCCL_DETERMINISTIC="true" |
| - export VLLM_ENABLE_V1_MULTIPROCESSING=0 |
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| - LCCL通信下(通过export HCCL_OP_EXPANSION_MODE="AIV"使能）: |
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| - export CLOSE_MATMUL_K_SHIFT=1 |
| - export ATB_MATMUL_SHUFFLE_K_ENABLE=0 |
| - export LCCL_DETERMINISTIC=1 |
| - export ATB_LLM_LCOC_ENABLE=0 |
| - export VLLM_ENABLE_V1_MULTIPROCESSING=0 |
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| 在单卡无通信情况下： |
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| - HCCL和LCCL通信下: |
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| - export CLOSE_MATMUL_K_SHIFT=1 |
| - export ATB_MATMUL_SHUFFLE_K_ENABLE=0 |
| - export VLLM_ENABLE_V1_MULTIPROCESSING=0 |
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| vLLM初始化参数 |
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| 需要对 SamplingParams 参数里单独设置seed, 保持vLLM和verl推理结果一致, 举例修改如下： |
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| .. code:: yaml |
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| sampling_params = SamplingParams(n=1, |
| logprobs=0, # can be set to 0 and let actor to recompute |
| max_tokens=config.response_length, |
| repetition_penalty=config.get("repetition_penalty", 1.0), |
| seed=1234) |
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