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fix n > 1 with vLLM V1 Engine #4295

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merged 1 commit into from
May 21, 2025
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fix n > 1 with vLLM V1 Engine #4295

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6 changes: 6 additions & 0 deletions swift/llm/infer/infer_engine/vllm_engine.py
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Original file line number Diff line number Diff line change
Expand Up @@ -307,6 +307,12 @@ def _prepare_generation_config(self, request_config: RequestConfig) -> SamplingP
if kwargs.get('seed') is None:
kwargs['seed'] = get_seed()
res = SamplingParams(**kwargs)

if hasattr(res, 'output_kind'):
# fix n > 1 in V1 Engine
from vllm.sampling_params import RequestOutputKind
res.output_kind = RequestOutputKind.FINAL_ONLY

res.top_logprobs = request_config.top_logprobs
return res

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