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[CB] add warning when exceeding 32K context length #385

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Merged
merged 2 commits into from
Aug 15, 2025
Merged

[CB] add warning when exceeding 32K context length #385

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add warning when exceeding 32K context length
yannicks1 Aug 15, 2025
9907a59
Update vllm_spyre/platform.py
yannicks1 Aug 15, 2025
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7 changes: 7 additions & 0 deletions vllm_spyre/platform.py
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Original file line number Diff line number Diff line change
Expand Up @@ -200,6 +200,13 @@ def check_and_update_config(cls, vllm_config: VllmConfig) -> None:
# set env vars for torch_sendnn to consume
os.environ["VLLM_DT_MAX_CONTEXT_LEN"] = str(
vllm_config.model_config.max_model_len)
if (envs_spyre.VLLM_SPYRE_USE_CB
and vllm_config.model_config.max_model_len > 32 * 1024):
logger.warning(
'Max context length is too big. Currently only 32K (32768) ' \
'context length is supported on Spyre for continuous ' \
'batching. Results might be off!'
)
# min value 2 needed for VLLM_DT_MAX_BATCH_SIZE (compiler constraint)
# Note that we can still have decodes of batch size 1 as the env var
# only concerns the max batch size.
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