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Provide default max model length (#1224)

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Woosuk Kwon 2023-09-28 14:44:02 -07:00 committed by GitHub
parent 6f88f762bf
commit f936657eb6
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4 changed files with 14 additions and 9 deletions
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18
vllm/config.py
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@ -164,9 +164,6 @@ class ModelConfig:
total_num_attention_heads = self.hf_config.num_attention_heads
return total_num_attention_heads // parallel_config.tensor_parallel_size
def get_max_model_len(self) -> int:
return self.max_model_len
def get_num_layers(self, parallel_config: "ParallelConfig") -> int:
total_num_hidden_layers = self.hf_config.num_hidden_layers
return total_num_hidden_layers // parallel_config.pipeline_parallel_size
@ -378,10 +375,17 @@ def _get_and_verify_max_len(
if max_len_key is not None:
derived_max_model_len = min(derived_max_model_len, max_len_key)
if derived_max_model_len == float("inf"):
raise ValueError(
"The model's config.json must contain one of the following keys "
"to determine the original maximum length of the model: "
f"{possible_keys}")
if max_model_len is not None:
# If max_model_len is specified, we use it.
return max_model_len
default_max_len = 2048
logger.warning(
"The model's config.json does not contain any of the following "
"keys to determine the original maximum length of the model: "
f"{possible_keys}. Assuming the model's maximum length is "
f"{default_max_len}.")
derived_max_model_len = default_max_len
rope_scaling = getattr(hf_config, "rope_scaling", None)
if rope_scaling is not None:

2
vllm/engine/arg_utils.py
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@ -184,7 +184,7 @@ class EngineArgs:
self.worker_use_ray)
scheduler_config = SchedulerConfig(self.max_num_batched_tokens,
self.max_num_seqs,
model_config.get_max_model_len())
model_config.max_model_len)
return model_config, cache_config, parallel_config, scheduler_config

1
vllm/engine/llm_engine.py
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@ -77,6 +77,7 @@ class LLMEngine:
f"revision={model_config.revision}, "
f"trust_remote_code={model_config.trust_remote_code}, "
f"dtype={model_config.dtype}, "
f"max_seq_len={model_config.max_model_len}, "
f"download_dir={model_config.download_dir!r}, "
f"load_format={model_config.load_format}, "
f"tensor_parallel_size={parallel_config.tensor_parallel_size}, "

2
vllm/entrypoints/openai/api_server.py
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@ -615,7 +615,7 @@ if __name__ == "__main__":
engine_args = AsyncEngineArgs.from_cli_args(args)
engine = AsyncLLMEngine.from_engine_args(engine_args)
engine_model_config = asyncio.run(engine.get_model_config())
max_model_len = engine_model_config.get_max_model_len()
max_model_len = engine_model_config.max_model_len
# A separate tokenizer to map token IDs to strings.
tokenizer = get_tokenizer(engine_args.tokenizer,