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[None][chore] Add error message for multiple response sampler_param with PyTorch backend #8815

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[None][chore] Add error message for multiple response sampler_param with PyTorch backend #8815

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6 changes: 6 additions & 0 deletions tensorrt_llm/llmapi/llm.py
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Original file line number Diff line number Diff line change
Expand Up @@ -627,6 +627,12 @@ def _check_arguments(self, prompt_len: int, query_len: int,
is_gen_only: bool) -> None:

if self.args.backend in ["pytorch", "_autodeploy"]:
# multiple responses (n > 1) is not supported for now, consistent with the error message in trtllm-serve
if sampling_params.n > 1 and self.args.backend == "pytorch":
raise ValueError(
"Multiple responses (n > 1) is not supported in PyTorch workflow"
)

# Check prompt length and query length against max_num_tokens to filter illegal requests.
# Skip check for gen-only requests
if self.args.backend == "pytorch" and not self.args.enable_chunked_prefill and not is_gen_only:
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