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@DarkLight1337 DarkLight1337 commented May 2, 2025

Following #17045 and #15428, the preprocessing logic has gotten rather complicated. This PR cleans that up by narrowing the prompt types early and handling them separately so that it becomes easier to keep track how each prompt type is being processed .

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
@DarkLight1337 DarkLight1337 added the ready ONLY add when PR is ready to merge/full CI is needed label May 2, 2025
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@mergify mergify bot added frontend multi-modality Related to multi-modality (#4194) labels May 2, 2025
Comment on lines -785 to -805
def _validate_token_prompt(self, prompt: PromptType,
tokenizer: AnyTokenizer):
# Guard against out-of-vocab tokens.
# For some tokenizers, tokenizer.decode will happily return empty text
# for token ids that are out of vocab, and we don't detect token ids
# that are greater than the max token id before running the model.
# However, these token ids will later crash a cuda kernel at runtime
# with an index out of bounds error. This will crash the entire engine.
# This needs to happen before multimodal input pre-processing, which
# may add dummy <image> tokens that aren't part of the tokenizer's
# vocabulary.
if is_token_prompt(prompt):
prompt_ids = prompt["prompt_token_ids"]
if len(prompt_ids) == 0:
# Empty prompt check is handled later
return
max_input_id = max(prompt_ids)
if max_input_id > tokenizer.max_token_id:
raise ValueError(
"Token id {} is out of vocabulary".format(max_input_id))

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@DarkLight1337 DarkLight1337 May 2, 2025

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#11980 lets us move this to after processor is applied, making V0 validation (_validate_model_inputs) same as V1.

@DarkLight1337 DarkLight1337 requested a review from Isotr0py May 2, 2025 10:39
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Comment on lines +73 to +77
cache_salt: NotRequired[str]
"""
Optional cache salt to be used for prefix caching.
"""

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@DarkLight1337 DarkLight1337 May 2, 2025

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Although we don't support embedding inputs in V1 yet, I added this so we don't forget to assign cache_salt during processing when we do implement it

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Overall looks reasonable to me!

Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
@vllm-bot vllm-bot merged commit cb23495 into vllm-project:main May 2, 2025
10 of 14 checks passed
@DarkLight1337 DarkLight1337 deleted the cleanup-processing branch May 2, 2025 15:11
RichardoMrMu pushed a commit to RichardoMrMu/vllm that referenced this pull request May 12, 2025
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: Mu Huai <tianbowen.tbw@antgroup.com>
mawong-amd pushed a commit to ROCm/vllm that referenced this pull request May 14, 2025
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
zzzyq pushed a commit to zzzyq/vllm that referenced this pull request May 24, 2025
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: Yuqi Zhang <yuqizhang@google.com>
minpeter pushed a commit to minpeter/vllm that referenced this pull request Jun 24, 2025
Signed-off-by: DarkLight1337 <tlleungac@connect.ust.hk>
Signed-off-by: minpeter <kali2005611@gmail.com>
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3 participants