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[Bugfix][V1][Spec Dec] Add generator to request even when no seed is provided. #17509

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[Bugfix][V1][Spec Dec] Add generator to request even when no seed is provided. #17509

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4 changes: 2 additions & 2 deletions vllm/v1/worker/gpu_model_runner.py
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Original file line number Diff line number Diff line change
Expand Up @@ -338,11 +338,11 @@ def _update_states(self, scheduler_output: "SchedulerOutput") -> None:
for new_req_data in scheduler_output.scheduled_new_reqs:
req_id = new_req_data.req_id
sampling_params = new_req_data.sampling_params
generator = torch.Generator(device=self.device)
if sampling_params.sampling_type == SamplingType.RANDOM_SEED:
generator = torch.Generator(device=self.device)
generator.manual_seed(sampling_params.seed)
else:
generator = None
generator.initial_seed()

self.requests[req_id] = CachedRequestState(
req_id=req_id,
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