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fix: logits processor state at each step #544

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Merged
tjohnson31415 merged 4 commits into from
Oct 27, 2025
Merged

fix: logits processor state at each step #544

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9080cbd
fix: update of batch at each generation step
wallashss Oct 27, 2025
8c8e23f
test: adjusted test to check if min tokens logits processor is cleared
wallashss Oct 27, 2025
180d732
test: addressed review comment
wallashss Oct 27, 2025
d686e51
style: fix linting
wallashss Oct 27, 2025
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16 changes: 11 additions & 5 deletions tests/e2e/test_sampling_params.py
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Original file line number Diff line number Diff line change
Expand Up @@ -262,17 +262,23 @@ def test_spyre_batch1_min_tokens(model: ModelInfo, backend, monkeypatch,
tokenizer = spyre_model.get_tokenizer()
eos_id = tokenizer.eos_token_id

params1 = SamplingParams(min_tokens=19,
logit_bias={eos_id: 50},
params1 = SamplingParams(min_tokens=10,
logit_bias={eos_id: 1000},
seed=8780,
max_tokens=20)
params2 = SamplingParams(seed=8780, logit_bias={eos_id: 50}, max_tokens=20)
params2 = SamplingParams(seed=8780,
logit_bias={eos_id: 1000},
max_tokens=20)

output1 = spyre_model.generate(prompt, params1)[0]
output2 = spyre_model.generate(prompt, params2)[0]

assert len(output1.outputs[0].token_ids) >= 19
assert len(output2.outputs[0].token_ids) < 19
# Logits bias should force eos token appears, then we check if
# after min tokens reached the logits processor is properly
# cleared. Therefore token count shall be 10 + 1
# (min_tokens + eos_token_id)
assert len(output1.outputs[0].token_ids) == 11
assert len(output2.outputs[0].token_ids) == 1


def test_spyre_batch1_ignore_eos(model: ModelInfo, backend, monkeypatch,
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3 changes: 3 additions & 0 deletions vllm_spyre/v1/worker/spyre_model_runner.py
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Expand Up @@ -404,6 +404,9 @@ def update_states(self, scheduler_output: SchedulerOutput):
# of logitprocs. Refactor so that we can batch removals to the
# `input_batch`
self.input_batch.refresh_metadata()
else:
# Due to logits processor we need to refresh metadata at each step
self.input_batch.refresh_metadata()

def _get_prompt_logprobs_dict(
self,
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