183 lines
6.9 KiB
Python
183 lines
6.9 KiB
Python
from typing import Dict, List, Mapping, Optional, Type, Union
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from typing_extensions import TypeVar
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from vllm.config import VllmConfig
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from vllm.engine.arg_utils import EngineArgs
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from vllm.engine.metrics_types import StatLoggerBase
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from vllm.envs import VLLM_ENABLE_V1_MULTIPROCESSING
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from vllm.inputs import INPUT_REGISTRY, InputRegistry, PromptType
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from vllm.logger import init_logger
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from vllm.lora.request import LoRARequest
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from vllm.multimodal import MULTIMODAL_REGISTRY, MultiModalRegistry
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from vllm.outputs import RequestOutput
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from vllm.pooling_params import PoolingParams
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from vllm.prompt_adapter.request import PromptAdapterRequest
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from vllm.sampling_params import SamplingParams
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from vllm.transformers_utils.tokenizer_group import (
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BaseTokenizerGroup, init_tokenizer_from_configs)
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from vllm.usage.usage_lib import UsageContext
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from vllm.v1.engine.core_client import EngineCoreClient
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from vllm.v1.engine.output_processor import OutputProcessor
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from vllm.v1.engine.processor import Processor
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from vllm.v1.executor.abstract import Executor
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logger = init_logger(__name__)
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_G = TypeVar("_G", bound=BaseTokenizerGroup, default=BaseTokenizerGroup)
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class LLMEngine:
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"""Legacy LLMEngine for backwards compatibility."""
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def __init__(
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self,
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vllm_config: VllmConfig,
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executor_class: Type[Executor],
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log_stats: bool,
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usage_context: UsageContext = UsageContext.ENGINE_CONTEXT,
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stat_loggers: Optional[Dict[str, StatLoggerBase]] = None,
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input_registry: InputRegistry = INPUT_REGISTRY,
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mm_registry: MultiModalRegistry = MULTIMODAL_REGISTRY,
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use_cached_outputs: bool = False,
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multiprocess_mode: bool = False,
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) -> None:
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self.model_config = vllm_config.model_config
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# Tokenizer (+ ensure liveness if running in another process).
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self.tokenizer = init_tokenizer_from_configs(
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model_config=vllm_config.model_config,
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scheduler_config=vllm_config.scheduler_config,
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parallel_config=vllm_config.parallel_config,
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lora_config=vllm_config.lora_config)
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self.tokenizer.ping()
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# Processor (convert Inputs --> EngineCoreRequests)
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self.processor = Processor(model_config=vllm_config.model_config,
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cache_config=vllm_config.cache_config,
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lora_config=vllm_config.lora_config,
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tokenizer=self.tokenizer,
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input_registry=input_registry,
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mm_registry=mm_registry)
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# OutputProcessor (convert EngineCoreOutputs --> RequestOutput).
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self.output_processor = OutputProcessor(self.tokenizer,
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log_stats=False)
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# EngineCore (gets EngineCoreRequests and gives EngineCoreOutputs)
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self.engine_core = EngineCoreClient.make_client(
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multiprocess_mode=multiprocess_mode,
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asyncio_mode=False,
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vllm_config=vllm_config,
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executor_class=executor_class,
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)
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@classmethod
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def from_engine_args(
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cls,
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engine_args: EngineArgs,
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usage_context: UsageContext = UsageContext.ENGINE_CONTEXT,
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stat_loggers: Optional[Dict[str, StatLoggerBase]] = None,
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enable_multiprocessing: bool = False,
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) -> "LLMEngine":
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"""Creates an LLM engine from the engine arguments."""
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# Create the engine configs.
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vllm_config = engine_args.create_engine_config(usage_context)
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executor_class = Executor.get_class(vllm_config)
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if VLLM_ENABLE_V1_MULTIPROCESSING:
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logger.debug("Enabling multiprocessing for LLMEngine.")
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enable_multiprocessing = True
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# Create the LLMEngine.
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return cls(vllm_config=vllm_config,
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executor_class=executor_class,
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log_stats=not engine_args.disable_log_stats,
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usage_context=usage_context,
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stat_loggers=stat_loggers,
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multiprocess_mode=enable_multiprocessing)
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def get_num_unfinished_requests(self) -> int:
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return self.output_processor.get_num_unfinished_requests()
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def has_unfinished_requests(self) -> bool:
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return self.output_processor.has_unfinished_requests()
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@classmethod
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def validate_outputs(cls, outputs, output_type):
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return outputs
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def abort_request(self, request_ids: List[str]) -> None:
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"""Remove request_ids from EngineCore and Detokenizer."""
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self.engine_core.abort_requests(request_ids)
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self.output_processor.abort_requests(request_ids)
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def add_request(
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self,
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request_id: str,
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prompt: PromptType,
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params: Union[SamplingParams, PoolingParams],
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arrival_time: Optional[float] = None,
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lora_request: Optional[LoRARequest] = None,
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trace_headers: Optional[Mapping[str, str]] = None,
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prompt_adapter_request: Optional[PromptAdapterRequest] = None,
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priority: int = 0,
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) -> None:
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# 1) Process raw inputs into the request.
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request = self.processor.process_inputs(request_id, prompt, params,
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arrival_time, lora_request,
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trace_headers,
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prompt_adapter_request,
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priority)
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# 2) Make a new RequestState and queue.
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self.output_processor.add_request(request)
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# 3) Add the request to EngineCore.
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self.engine_core.add_request(request)
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def step(self) -> List[RequestOutput]:
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# 1) Get EngineCoreOutput from the EngineCore.
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outputs = self.engine_core.get_output()
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# 2) Process EngineCoreOutputs.
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processed_outputs = self.output_processor.process_outputs(
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outputs.outputs)
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# 3) Abort any reqs that finished due to stop strings.
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self.engine_core.abort_requests(processed_outputs.reqs_to_abort)
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return processed_outputs.request_outputs
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def get_model_config(self):
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return self.model_config
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def start_profile(self):
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self.engine_core.profile(True)
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def stop_profile(self):
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self.engine_core.profile(False)
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def reset_prefix_cache(self):
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self.engine_core.reset_prefix_cache()
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def get_tokenizer_group(
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self,
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group_type: Type[_G] = BaseTokenizerGroup,
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) -> _G:
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tokenizer_group = self.tokenizer
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if tokenizer_group is None:
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raise ValueError("Unable to get tokenizer because "
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"skip_tokenizer_init is True")
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if not isinstance(tokenizer_group, group_type):
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raise TypeError("Invalid type of tokenizer group. "
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f"Expected type: {group_type}, but "
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f"found type: {type(tokenizer_group)}")
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return tokenizer_group
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