b729901139
Signed-off-by: Travis Johnson <tsjohnso@us.ibm.com> Co-authored-by: Cyrus Leung <cyrus.tl.leung@gmail.com>
1157 lines
53 KiB
Python
1157 lines
53 KiB
Python
import argparse
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import dataclasses
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import json
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from dataclasses import dataclass
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from typing import (TYPE_CHECKING, Any, Dict, List, Literal, Mapping, Optional,
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Tuple, Type, Union, cast, get_args)
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import torch
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import vllm.envs as envs
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from vllm.config import (CacheConfig, ConfigFormat, DecodingConfig,
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DeviceConfig, EngineConfig, LoadConfig, LoadFormat,
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LoRAConfig, ModelConfig, ObservabilityConfig,
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ParallelConfig, PromptAdapterConfig, SchedulerConfig,
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SpeculativeConfig, TaskOption, TokenizerPoolConfig)
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from vllm.executor.executor_base import ExecutorBase
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from vllm.logger import init_logger
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from vllm.model_executor.layers.quantization import QUANTIZATION_METHODS
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from vllm.transformers_utils.config import (
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maybe_register_config_serialize_by_value)
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from vllm.transformers_utils.utils import check_gguf_file
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from vllm.utils import FlexibleArgumentParser
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if TYPE_CHECKING:
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from vllm.transformers_utils.tokenizer_group import BaseTokenizerGroup
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logger = init_logger(__name__)
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ALLOWED_DETAILED_TRACE_MODULES = ["model", "worker", "all"]
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DEVICE_OPTIONS = [
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"auto",
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"cuda",
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"neuron",
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"cpu",
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"openvino",
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"tpu",
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"xpu",
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]
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def nullable_str(val: str):
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if not val or val == "None":
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return None
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return val
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def nullable_kvs(val: str) -> Optional[Mapping[str, int]]:
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"""Parses a string containing comma separate key [str] to value [int]
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pairs into a dictionary.
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Args:
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val: String value to be parsed.
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Returns:
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Dictionary with parsed values.
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"""
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if len(val) == 0:
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return None
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out_dict: Dict[str, int] = {}
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for item in val.split(","):
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kv_parts = [part.lower().strip() for part in item.split("=")]
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if len(kv_parts) != 2:
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raise argparse.ArgumentTypeError(
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"Each item should be in the form KEY=VALUE")
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key, value = kv_parts
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try:
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parsed_value = int(value)
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except ValueError as exc:
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msg = f"Failed to parse value of item {key}={value}"
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raise argparse.ArgumentTypeError(msg) from exc
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if key in out_dict and out_dict[key] != parsed_value:
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raise argparse.ArgumentTypeError(
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f"Conflicting values specified for key: {key}")
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out_dict[key] = parsed_value
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return out_dict
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@dataclass
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class EngineArgs:
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"""Arguments for vLLM engine."""
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model: str = 'facebook/opt-125m'
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served_model_name: Optional[Union[str, List[str]]] = None
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tokenizer: Optional[str] = None
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task: TaskOption = "auto"
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skip_tokenizer_init: bool = False
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tokenizer_mode: str = 'auto'
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trust_remote_code: bool = False
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download_dir: Optional[str] = None
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load_format: str = 'auto'
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config_format: ConfigFormat = ConfigFormat.AUTO
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dtype: str = 'auto'
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kv_cache_dtype: str = 'auto'
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quantization_param_path: Optional[str] = None
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seed: int = 0
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max_model_len: Optional[int] = None
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worker_use_ray: bool = False
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# Note: Specifying a custom executor backend by passing a class
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# is intended for expert use only. The API may change without
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# notice.
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distributed_executor_backend: Optional[Union[str,
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Type[ExecutorBase]]] = None
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pipeline_parallel_size: int = 1
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tensor_parallel_size: int = 1
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max_parallel_loading_workers: Optional[int] = None
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block_size: int = 16
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enable_prefix_caching: bool = False
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disable_sliding_window: bool = False
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use_v2_block_manager: bool = True
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swap_space: float = 4 # GiB
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cpu_offload_gb: float = 0 # GiB
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gpu_memory_utilization: float = 0.90
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max_num_batched_tokens: Optional[int] = None
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max_num_seqs: int = 256
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max_logprobs: int = 20 # Default value for OpenAI Chat Completions API
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disable_log_stats: bool = False
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revision: Optional[str] = None
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code_revision: Optional[str] = None
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rope_scaling: Optional[dict] = None
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rope_theta: Optional[float] = None
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tokenizer_revision: Optional[str] = None
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quantization: Optional[str] = None
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enforce_eager: Optional[bool] = None
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max_context_len_to_capture: Optional[int] = None
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max_seq_len_to_capture: int = 8192
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disable_custom_all_reduce: bool = False
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tokenizer_pool_size: int = 0
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# Note: Specifying a tokenizer pool by passing a class
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# is intended for expert use only. The API may change without
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# notice.
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tokenizer_pool_type: Union[str, Type["BaseTokenizerGroup"]] = "ray"
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tokenizer_pool_extra_config: Optional[dict] = None
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limit_mm_per_prompt: Optional[Mapping[str, int]] = None
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enable_lora: bool = False
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max_loras: int = 1
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max_lora_rank: int = 16
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enable_prompt_adapter: bool = False
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max_prompt_adapters: int = 1
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max_prompt_adapter_token: int = 0
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fully_sharded_loras: bool = False
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lora_extra_vocab_size: int = 256
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long_lora_scaling_factors: Optional[Tuple[float]] = None
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lora_dtype: Optional[Union[str, torch.dtype]] = 'auto'
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max_cpu_loras: Optional[int] = None
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device: str = 'auto'
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num_scheduler_steps: int = 1
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multi_step_stream_outputs: bool = True
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ray_workers_use_nsight: bool = False
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num_gpu_blocks_override: Optional[int] = None
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num_lookahead_slots: int = 0
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model_loader_extra_config: Optional[dict] = None
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ignore_patterns: Optional[Union[str, List[str]]] = None
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preemption_mode: Optional[str] = None
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scheduler_delay_factor: float = 0.0
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enable_chunked_prefill: Optional[bool] = None
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guided_decoding_backend: str = 'outlines'
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# Speculative decoding configuration.
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speculative_model: Optional[str] = None
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speculative_model_quantization: Optional[str] = None
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speculative_draft_tensor_parallel_size: Optional[int] = None
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num_speculative_tokens: Optional[int] = None
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speculative_disable_mqa_scorer: Optional[bool] = False
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speculative_max_model_len: Optional[int] = None
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speculative_disable_by_batch_size: Optional[int] = None
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ngram_prompt_lookup_max: Optional[int] = None
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ngram_prompt_lookup_min: Optional[int] = None
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spec_decoding_acceptance_method: str = 'rejection_sampler'
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typical_acceptance_sampler_posterior_threshold: Optional[float] = None
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typical_acceptance_sampler_posterior_alpha: Optional[float] = None
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qlora_adapter_name_or_path: Optional[str] = None
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disable_logprobs_during_spec_decoding: Optional[bool] = None
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otlp_traces_endpoint: Optional[str] = None
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collect_detailed_traces: Optional[str] = None
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disable_async_output_proc: bool = False
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override_neuron_config: Optional[Dict[str, Any]] = None
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mm_processor_kwargs: Optional[Dict[str, Any]] = None
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scheduling_policy: Literal["fcfs", "priority"] = "fcfs"
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def __post_init__(self):
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if not self.tokenizer:
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self.tokenizer = self.model
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# Setup plugins
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from vllm.plugins import load_general_plugins
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load_general_plugins()
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@staticmethod
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def add_cli_args(parser: FlexibleArgumentParser) -> FlexibleArgumentParser:
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"""Shared CLI arguments for vLLM engine."""
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# Model arguments
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parser.add_argument(
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'--model',
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type=str,
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default=EngineArgs.model,
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help='Name or path of the huggingface model to use.')
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parser.add_argument(
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'--task',
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default=EngineArgs.task,
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choices=get_args(TaskOption),
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help='The task to use the model for. Each vLLM instance only '
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'supports one task, even if the same model can be used for '
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'multiple tasks. When the model only supports one task, "auto" '
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'can be used to select it; otherwise, you must specify explicitly '
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'which task to use.')
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parser.add_argument(
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'--tokenizer',
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type=nullable_str,
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default=EngineArgs.tokenizer,
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help='Name or path of the huggingface tokenizer to use. '
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'If unspecified, model name or path will be used.')
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parser.add_argument(
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'--skip-tokenizer-init',
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action='store_true',
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help='Skip initialization of tokenizer and detokenizer')
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parser.add_argument(
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'--revision',
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type=nullable_str,
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default=None,
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help='The specific model version to use. It can be a branch '
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'name, a tag name, or a commit id. If unspecified, will use '
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'the default version.')
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parser.add_argument(
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'--code-revision',
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type=nullable_str,
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default=None,
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help='The specific revision to use for the model code on '
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'Hugging Face Hub. It can be a branch name, a tag name, or a '
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'commit id. If unspecified, will use the default version.')
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parser.add_argument(
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'--tokenizer-revision',
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type=nullable_str,
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default=None,
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help='Revision of the huggingface tokenizer to use. '
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'It can be a branch name, a tag name, or a commit id. '
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'If unspecified, will use the default version.')
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parser.add_argument(
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'--tokenizer-mode',
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type=str,
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default=EngineArgs.tokenizer_mode,
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choices=['auto', 'slow', 'mistral'],
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help='The tokenizer mode.\n\n* "auto" will use the '
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'fast tokenizer if available.\n* "slow" will '
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'always use the slow tokenizer. \n* '
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'"mistral" will always use the `mistral_common` tokenizer.')
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parser.add_argument('--trust-remote-code',
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action='store_true',
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help='Trust remote code from huggingface.')
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parser.add_argument('--download-dir',
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type=nullable_str,
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default=EngineArgs.download_dir,
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help='Directory to download and load the weights, '
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'default to the default cache dir of '
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'huggingface.')
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parser.add_argument(
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'--load-format',
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type=str,
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default=EngineArgs.load_format,
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choices=[f.value for f in LoadFormat],
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help='The format of the model weights to load.\n\n'
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'* "auto" will try to load the weights in the safetensors format '
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'and fall back to the pytorch bin format if safetensors format '
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'is not available.\n'
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'* "pt" will load the weights in the pytorch bin format.\n'
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'* "safetensors" will load the weights in the safetensors format.\n'
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'* "npcache" will load the weights in pytorch format and store '
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'a numpy cache to speed up the loading.\n'
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'* "dummy" will initialize the weights with random values, '
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'which is mainly for profiling.\n'
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'* "tensorizer" will load the weights using tensorizer from '
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'CoreWeave. See the Tensorize vLLM Model script in the Examples '
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'section for more information.\n'
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'* "bitsandbytes" will load the weights using bitsandbytes '
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'quantization.\n')
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parser.add_argument(
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'--config-format',
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default=EngineArgs.config_format,
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choices=[f.value for f in ConfigFormat],
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help='The format of the model config to load.\n\n'
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'* "auto" will try to load the config in hf format '
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'if available else it will try to load in mistral format ')
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parser.add_argument(
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'--dtype',
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type=str,
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default=EngineArgs.dtype,
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choices=[
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'auto', 'half', 'float16', 'bfloat16', 'float', 'float32'
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],
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help='Data type for model weights and activations.\n\n'
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'* "auto" will use FP16 precision for FP32 and FP16 models, and '
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'BF16 precision for BF16 models.\n'
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'* "half" for FP16. Recommended for AWQ quantization.\n'
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'* "float16" is the same as "half".\n'
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'* "bfloat16" for a balance between precision and range.\n'
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'* "float" is shorthand for FP32 precision.\n'
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'* "float32" for FP32 precision.')
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parser.add_argument(
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'--kv-cache-dtype',
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type=str,
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choices=['auto', 'fp8', 'fp8_e5m2', 'fp8_e4m3'],
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default=EngineArgs.kv_cache_dtype,
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help='Data type for kv cache storage. If "auto", will use model '
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'data type. CUDA 11.8+ supports fp8 (=fp8_e4m3) and fp8_e5m2. '
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'ROCm (AMD GPU) supports fp8 (=fp8_e4m3)')
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parser.add_argument(
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'--quantization-param-path',
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type=nullable_str,
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default=None,
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help='Path to the JSON file containing the KV cache '
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'scaling factors. This should generally be supplied, when '
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'KV cache dtype is FP8. Otherwise, KV cache scaling factors '
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'default to 1.0, which may cause accuracy issues. '
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'FP8_E5M2 (without scaling) is only supported on cuda version'
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'greater than 11.8. On ROCm (AMD GPU), FP8_E4M3 is instead '
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'supported for common inference criteria.')
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parser.add_argument('--max-model-len',
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type=int,
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default=EngineArgs.max_model_len,
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help='Model context length. If unspecified, will '
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'be automatically derived from the model config.')
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parser.add_argument(
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'--guided-decoding-backend',
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type=str,
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default='outlines',
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choices=['outlines', 'lm-format-enforcer'],
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help='Which engine will be used for guided decoding'
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' (JSON schema / regex etc) by default. Currently support '
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'https://github.com/outlines-dev/outlines and '
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'https://github.com/noamgat/lm-format-enforcer.'
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' Can be overridden per request via guided_decoding_backend'
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' parameter.')
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# Parallel arguments
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parser.add_argument(
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'--distributed-executor-backend',
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choices=['ray', 'mp'],
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default=EngineArgs.distributed_executor_backend,
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help='Backend to use for distributed serving. When more than 1 GPU '
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'is used, will be automatically set to "ray" if installed '
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'or "mp" (multiprocessing) otherwise.')
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parser.add_argument(
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'--worker-use-ray',
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action='store_true',
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help='Deprecated, use --distributed-executor-backend=ray.')
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parser.add_argument('--pipeline-parallel-size',
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'-pp',
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type=int,
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default=EngineArgs.pipeline_parallel_size,
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help='Number of pipeline stages.')
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parser.add_argument('--tensor-parallel-size',
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'-tp',
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type=int,
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default=EngineArgs.tensor_parallel_size,
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help='Number of tensor parallel replicas.')
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parser.add_argument(
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'--max-parallel-loading-workers',
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type=int,
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default=EngineArgs.max_parallel_loading_workers,
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help='Load model sequentially in multiple batches, '
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'to avoid RAM OOM when using tensor '
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'parallel and large models.')
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parser.add_argument(
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'--ray-workers-use-nsight',
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action='store_true',
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help='If specified, use nsight to profile Ray workers.')
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# KV cache arguments
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parser.add_argument('--block-size',
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type=int,
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default=EngineArgs.block_size,
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choices=[8, 16, 32],
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help='Token block size for contiguous chunks of '
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'tokens. This is ignored on neuron devices and '
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'set to max-model-len')
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parser.add_argument('--enable-prefix-caching',
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action='store_true',
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help='Enables automatic prefix caching.')
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parser.add_argument('--disable-sliding-window',
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action='store_true',
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help='Disables sliding window, '
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'capping to sliding window size')
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parser.add_argument('--use-v2-block-manager',
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action='store_true',
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help='[DEPRECATED] block manager v1 has been '
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'removed and SelfAttnBlockSpaceManager (i.e. '
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'block manager v2) is now the default. '
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'Setting this flag to True or False'
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' has no effect on vLLM behavior.')
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parser.add_argument(
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'--num-lookahead-slots',
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type=int,
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default=EngineArgs.num_lookahead_slots,
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help='Experimental scheduling config necessary for '
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'speculative decoding. This will be replaced by '
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'speculative config in the future; it is present '
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'to enable correctness tests until then.')
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|
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parser.add_argument('--seed',
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type=int,
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default=EngineArgs.seed,
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help='Random seed for operations.')
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parser.add_argument('--swap-space',
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type=float,
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default=EngineArgs.swap_space,
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help='CPU swap space size (GiB) per GPU.')
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parser.add_argument(
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'--cpu-offload-gb',
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type=float,
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default=0,
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help='The space in GiB to offload to CPU, per GPU. '
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'Default is 0, which means no offloading. Intuitively, '
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'this argument can be seen as a virtual way to increase '
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'the GPU memory size. For example, if you have one 24 GB '
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'GPU and set this to 10, virtually you can think of it as '
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'a 34 GB GPU. Then you can load a 13B model with BF16 weight,'
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'which requires at least 26GB GPU memory. Note that this '
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'requires fast CPU-GPU interconnect, as part of the model is'
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'loaded from CPU memory to GPU memory on the fly in each '
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'model forward pass.')
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parser.add_argument(
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'--gpu-memory-utilization',
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type=float,
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default=EngineArgs.gpu_memory_utilization,
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help='The fraction of GPU memory to be used for the model '
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'executor, which can range from 0 to 1. For example, a value of '
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'0.5 would imply 50%% GPU memory utilization. If unspecified, '
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'will use the default value of 0.9. This is a global gpu memory '
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'utilization limit, for example if 50%% of the gpu memory is '
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'already used before vLLM starts and --gpu-memory-utilization is '
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'set to 0.9, then only 40%% of the gpu memory will be allocated '
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'to the model executor.')
|
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parser.add_argument(
|
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'--num-gpu-blocks-override',
|
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type=int,
|
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default=None,
|
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help='If specified, ignore GPU profiling result and use this number'
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'of GPU blocks. Used for testing preemption.')
|
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parser.add_argument('--max-num-batched-tokens',
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type=int,
|
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default=EngineArgs.max_num_batched_tokens,
|
|
help='Maximum number of batched tokens per '
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'iteration.')
|
|
parser.add_argument('--max-num-seqs',
|
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type=int,
|
|
default=EngineArgs.max_num_seqs,
|
|
help='Maximum number of sequences per iteration.')
|
|
parser.add_argument(
|
|
'--max-logprobs',
|
|
type=int,
|
|
default=EngineArgs.max_logprobs,
|
|
help=('Max number of log probs to return logprobs is specified in'
|
|
' SamplingParams.'))
|
|
parser.add_argument('--disable-log-stats',
|
|
action='store_true',
|
|
help='Disable logging statistics.')
|
|
# Quantization settings.
|
|
parser.add_argument('--quantization',
|
|
'-q',
|
|
type=nullable_str,
|
|
choices=[*QUANTIZATION_METHODS, None],
|
|
default=EngineArgs.quantization,
|
|
help='Method used to quantize the weights. If '
|
|
'None, we first check the `quantization_config` '
|
|
'attribute in the model config file. If that is '
|
|
'None, we assume the model weights are not '
|
|
'quantized and use `dtype` to determine the data '
|
|
'type of the weights.')
|
|
parser.add_argument(
|
|
'--rope-scaling',
|
|
default=None,
|
|
type=json.loads,
|
|
help='RoPE scaling configuration in JSON format. '
|
|
'For example, {"rope_type":"dynamic","factor":2.0}')
|
|
parser.add_argument('--rope-theta',
|
|
default=None,
|
|
type=float,
|
|
help='RoPE theta. Use with `rope_scaling`. In '
|
|
'some cases, changing the RoPE theta improves the '
|
|
'performance of the scaled model.')
|
|
parser.add_argument('--enforce-eager',
|
|
action='store_true',
|
|
help='Always use eager-mode PyTorch. If False, '
|
|
'will use eager mode and CUDA graph in hybrid '
|
|
'for maximal performance and flexibility.')
|
|
parser.add_argument('--max-context-len-to-capture',
|
|
type=int,
|
|
default=EngineArgs.max_context_len_to_capture,
|
|
help='Maximum context length covered by CUDA '
|
|
'graphs. When a sequence has context length '
|
|
'larger than this, we fall back to eager mode. '
|
|
'(DEPRECATED. Use --max-seq-len-to-capture instead'
|
|
')')
|
|
parser.add_argument('--max-seq-len-to-capture',
|
|
type=int,
|
|
default=EngineArgs.max_seq_len_to_capture,
|
|
help='Maximum sequence length covered by CUDA '
|
|
'graphs. When a sequence has context length '
|
|
'larger than this, we fall back to eager mode. '
|
|
'Additionally for encoder-decoder models, if the '
|
|
'sequence length of the encoder input is larger '
|
|
'than this, we fall back to the eager mode.')
|
|
parser.add_argument('--disable-custom-all-reduce',
|
|
action='store_true',
|
|
default=EngineArgs.disable_custom_all_reduce,
|
|
help='See ParallelConfig.')
|
|
parser.add_argument('--tokenizer-pool-size',
|
|
type=int,
|
|
default=EngineArgs.tokenizer_pool_size,
|
|
help='Size of tokenizer pool to use for '
|
|
'asynchronous tokenization. If 0, will '
|
|
'use synchronous tokenization.')
|
|
parser.add_argument('--tokenizer-pool-type',
|
|
type=str,
|
|
default=EngineArgs.tokenizer_pool_type,
|
|
help='Type of tokenizer pool to use for '
|
|
'asynchronous tokenization. Ignored '
|
|
'if tokenizer_pool_size is 0.')
|
|
parser.add_argument('--tokenizer-pool-extra-config',
|
|
type=nullable_str,
|
|
default=EngineArgs.tokenizer_pool_extra_config,
|
|
help='Extra config for tokenizer pool. '
|
|
'This should be a JSON string that will be '
|
|
'parsed into a dictionary. Ignored if '
|
|
'tokenizer_pool_size is 0.')
|
|
|
|
# Multimodal related configs
|
|
parser.add_argument(
|
|
'--limit-mm-per-prompt',
|
|
type=nullable_kvs,
|
|
default=EngineArgs.limit_mm_per_prompt,
|
|
# The default value is given in
|
|
# MultiModalRegistry.init_mm_limits_per_prompt
|
|
help=('For each multimodal plugin, limit how many '
|
|
'input instances to allow for each prompt. '
|
|
'Expects a comma-separated list of items, '
|
|
'e.g.: `image=16,video=2` allows a maximum of 16 '
|
|
'images and 2 videos per prompt. Defaults to 1 for '
|
|
'each modality.'))
|
|
parser.add_argument(
|
|
'--mm-processor-kwargs',
|
|
default=None,
|
|
type=json.loads,
|
|
help=('Overrides for the multimodal input mapping/processing,'
|
|
'e.g., image processor. For example: {"num_crops": 4}.'))
|
|
|
|
# LoRA related configs
|
|
parser.add_argument('--enable-lora',
|
|
action='store_true',
|
|
help='If True, enable handling of LoRA adapters.')
|
|
parser.add_argument('--max-loras',
|
|
type=int,
|
|
default=EngineArgs.max_loras,
|
|
help='Max number of LoRAs in a single batch.')
|
|
parser.add_argument('--max-lora-rank',
|
|
type=int,
|
|
default=EngineArgs.max_lora_rank,
|
|
help='Max LoRA rank.')
|
|
parser.add_argument(
|
|
'--lora-extra-vocab-size',
|
|
type=int,
|
|
default=EngineArgs.lora_extra_vocab_size,
|
|
help=('Maximum size of extra vocabulary that can be '
|
|
'present in a LoRA adapter (added to the base '
|
|
'model vocabulary).'))
|
|
parser.add_argument(
|
|
'--lora-dtype',
|
|
type=str,
|
|
default=EngineArgs.lora_dtype,
|
|
choices=['auto', 'float16', 'bfloat16', 'float32'],
|
|
help=('Data type for LoRA. If auto, will default to '
|
|
'base model dtype.'))
|
|
parser.add_argument(
|
|
'--long-lora-scaling-factors',
|
|
type=nullable_str,
|
|
default=EngineArgs.long_lora_scaling_factors,
|
|
help=('Specify multiple scaling factors (which can '
|
|
'be different from base model scaling factor '
|
|
'- see eg. Long LoRA) to allow for multiple '
|
|
'LoRA adapters trained with those scaling '
|
|
'factors to be used at the same time. If not '
|
|
'specified, only adapters trained with the '
|
|
'base model scaling factor are allowed.'))
|
|
parser.add_argument(
|
|
'--max-cpu-loras',
|
|
type=int,
|
|
default=EngineArgs.max_cpu_loras,
|
|
help=('Maximum number of LoRAs to store in CPU memory. '
|
|
'Must be >= than max_num_seqs. '
|
|
'Defaults to max_num_seqs.'))
|
|
parser.add_argument(
|
|
'--fully-sharded-loras',
|
|
action='store_true',
|
|
help=('By default, only half of the LoRA computation is '
|
|
'sharded with tensor parallelism. '
|
|
'Enabling this will use the fully sharded layers. '
|
|
'At high sequence length, max rank or '
|
|
'tensor parallel size, this is likely faster.'))
|
|
parser.add_argument('--enable-prompt-adapter',
|
|
action='store_true',
|
|
help='If True, enable handling of PromptAdapters.')
|
|
parser.add_argument('--max-prompt-adapters',
|
|
type=int,
|
|
default=EngineArgs.max_prompt_adapters,
|
|
help='Max number of PromptAdapters in a batch.')
|
|
parser.add_argument('--max-prompt-adapter-token',
|
|
type=int,
|
|
default=EngineArgs.max_prompt_adapter_token,
|
|
help='Max number of PromptAdapters tokens')
|
|
parser.add_argument("--device",
|
|
type=str,
|
|
default=EngineArgs.device,
|
|
choices=DEVICE_OPTIONS,
|
|
help='Device type for vLLM execution.')
|
|
parser.add_argument('--num-scheduler-steps',
|
|
type=int,
|
|
default=1,
|
|
help=('Maximum number of forward steps per '
|
|
'scheduler call.'))
|
|
|
|
parser.add_argument(
|
|
'--multi-step-stream-outputs',
|
|
action=StoreBoolean,
|
|
default=EngineArgs.multi_step_stream_outputs,
|
|
nargs="?",
|
|
const="True",
|
|
help='If False, then multi-step will stream outputs at the end '
|
|
'of all steps')
|
|
parser.add_argument(
|
|
'--scheduler-delay-factor',
|
|
type=float,
|
|
default=EngineArgs.scheduler_delay_factor,
|
|
help='Apply a delay (of delay factor multiplied by previous '
|
|
'prompt latency) before scheduling next prompt.')
|
|
parser.add_argument(
|
|
'--enable-chunked-prefill',
|
|
action=StoreBoolean,
|
|
default=EngineArgs.enable_chunked_prefill,
|
|
nargs="?",
|
|
const="True",
|
|
help='If set, the prefill requests can be chunked based on the '
|
|
'max_num_batched_tokens.')
|
|
|
|
parser.add_argument(
|
|
'--speculative-model',
|
|
type=nullable_str,
|
|
default=EngineArgs.speculative_model,
|
|
help=
|
|
'The name of the draft model to be used in speculative decoding.')
|
|
# Quantization settings for speculative model.
|
|
parser.add_argument(
|
|
'--speculative-model-quantization',
|
|
type=nullable_str,
|
|
choices=[*QUANTIZATION_METHODS, None],
|
|
default=EngineArgs.speculative_model_quantization,
|
|
help='Method used to quantize the weights of speculative model. '
|
|
'If None, we first check the `quantization_config` '
|
|
'attribute in the model config file. If that is '
|
|
'None, we assume the model weights are not '
|
|
'quantized and use `dtype` to determine the data '
|
|
'type of the weights.')
|
|
parser.add_argument(
|
|
'--num-speculative-tokens',
|
|
type=int,
|
|
default=EngineArgs.num_speculative_tokens,
|
|
help='The number of speculative tokens to sample from '
|
|
'the draft model in speculative decoding.')
|
|
parser.add_argument(
|
|
'--speculative-disable-mqa-scorer',
|
|
action='store_true',
|
|
help=
|
|
'If set to True, the MQA scorer will be disabled in speculative '
|
|
' and fall back to batch expansion')
|
|
parser.add_argument(
|
|
'--speculative-draft-tensor-parallel-size',
|
|
'-spec-draft-tp',
|
|
type=int,
|
|
default=EngineArgs.speculative_draft_tensor_parallel_size,
|
|
help='Number of tensor parallel replicas for '
|
|
'the draft model in speculative decoding.')
|
|
|
|
parser.add_argument(
|
|
'--speculative-max-model-len',
|
|
type=int,
|
|
default=EngineArgs.speculative_max_model_len,
|
|
help='The maximum sequence length supported by the '
|
|
'draft model. Sequences over this length will skip '
|
|
'speculation.')
|
|
|
|
parser.add_argument(
|
|
'--speculative-disable-by-batch-size',
|
|
type=int,
|
|
default=EngineArgs.speculative_disable_by_batch_size,
|
|
help='Disable speculative decoding for new incoming requests '
|
|
'if the number of enqueue requests is larger than this value.')
|
|
|
|
parser.add_argument(
|
|
'--ngram-prompt-lookup-max',
|
|
type=int,
|
|
default=EngineArgs.ngram_prompt_lookup_max,
|
|
help='Max size of window for ngram prompt lookup in speculative '
|
|
'decoding.')
|
|
|
|
parser.add_argument(
|
|
'--ngram-prompt-lookup-min',
|
|
type=int,
|
|
default=EngineArgs.ngram_prompt_lookup_min,
|
|
help='Min size of window for ngram prompt lookup in speculative '
|
|
'decoding.')
|
|
|
|
parser.add_argument(
|
|
'--spec-decoding-acceptance-method',
|
|
type=str,
|
|
default=EngineArgs.spec_decoding_acceptance_method,
|
|
choices=['rejection_sampler', 'typical_acceptance_sampler'],
|
|
help='Specify the acceptance method to use during draft token '
|
|
'verification in speculative decoding. Two types of acceptance '
|
|
'routines are supported: '
|
|
'1) RejectionSampler which does not allow changing the '
|
|
'acceptance rate of draft tokens, '
|
|
'2) TypicalAcceptanceSampler which is configurable, allowing for '
|
|
'a higher acceptance rate at the cost of lower quality, '
|
|
'and vice versa.')
|
|
|
|
parser.add_argument(
|
|
'--typical-acceptance-sampler-posterior-threshold',
|
|
type=float,
|
|
default=EngineArgs.typical_acceptance_sampler_posterior_threshold,
|
|
help='Set the lower bound threshold for the posterior '
|
|
'probability of a token to be accepted. This threshold is '
|
|
'used by the TypicalAcceptanceSampler to make sampling decisions '
|
|
'during speculative decoding. Defaults to 0.09')
|
|
|
|
parser.add_argument(
|
|
'--typical-acceptance-sampler-posterior-alpha',
|
|
type=float,
|
|
default=EngineArgs.typical_acceptance_sampler_posterior_alpha,
|
|
help='A scaling factor for the entropy-based threshold for token '
|
|
'acceptance in the TypicalAcceptanceSampler. Typically defaults '
|
|
'to sqrt of --typical-acceptance-sampler-posterior-threshold '
|
|
'i.e. 0.3')
|
|
|
|
parser.add_argument(
|
|
'--disable-logprobs-during-spec-decoding',
|
|
action=StoreBoolean,
|
|
default=EngineArgs.disable_logprobs_during_spec_decoding,
|
|
nargs="?",
|
|
const="True",
|
|
help='If set to True, token log probabilities are not returned '
|
|
'during speculative decoding. If set to False, log probabilities '
|
|
'are returned according to the settings in SamplingParams. If '
|
|
'not specified, it defaults to True. Disabling log probabilities '
|
|
'during speculative decoding reduces latency by skipping logprob '
|
|
'calculation in proposal sampling, target sampling, and after '
|
|
'accepted tokens are determined.')
|
|
|
|
parser.add_argument('--model-loader-extra-config',
|
|
type=nullable_str,
|
|
default=EngineArgs.model_loader_extra_config,
|
|
help='Extra config for model loader. '
|
|
'This will be passed to the model loader '
|
|
'corresponding to the chosen load_format. '
|
|
'This should be a JSON string that will be '
|
|
'parsed into a dictionary.')
|
|
parser.add_argument(
|
|
'--ignore-patterns',
|
|
action="append",
|
|
type=str,
|
|
default=[],
|
|
help="The pattern(s) to ignore when loading the model."
|
|
"Default to 'original/**/*' to avoid repeated loading of llama's "
|
|
"checkpoints.")
|
|
parser.add_argument(
|
|
'--preemption-mode',
|
|
type=str,
|
|
default=None,
|
|
help='If \'recompute\', the engine performs preemption by '
|
|
'recomputing; If \'swap\', the engine performs preemption by '
|
|
'block swapping.')
|
|
|
|
parser.add_argument(
|
|
"--served-model-name",
|
|
nargs="+",
|
|
type=str,
|
|
default=None,
|
|
help="The model name(s) used in the API. If multiple "
|
|
"names are provided, the server will respond to any "
|
|
"of the provided names. The model name in the model "
|
|
"field of a response will be the first name in this "
|
|
"list. If not specified, the model name will be the "
|
|
"same as the `--model` argument. Noted that this name(s)"
|
|
"will also be used in `model_name` tag content of "
|
|
"prometheus metrics, if multiple names provided, metrics"
|
|
"tag will take the first one.")
|
|
parser.add_argument('--qlora-adapter-name-or-path',
|
|
type=str,
|
|
default=None,
|
|
help='Name or path of the QLoRA adapter.')
|
|
|
|
parser.add_argument(
|
|
'--otlp-traces-endpoint',
|
|
type=str,
|
|
default=None,
|
|
help='Target URL to which OpenTelemetry traces will be sent.')
|
|
parser.add_argument(
|
|
'--collect-detailed-traces',
|
|
type=str,
|
|
default=None,
|
|
help="Valid choices are " +
|
|
",".join(ALLOWED_DETAILED_TRACE_MODULES) +
|
|
". It makes sense to set this only if --otlp-traces-endpoint is"
|
|
" set. If set, it will collect detailed traces for the specified "
|
|
"modules. This involves use of possibly costly and or blocking "
|
|
"operations and hence might have a performance impact.")
|
|
|
|
parser.add_argument(
|
|
'--disable-async-output-proc',
|
|
action='store_true',
|
|
default=EngineArgs.disable_async_output_proc,
|
|
help="Disable async output processing. This may result in "
|
|
"lower performance.")
|
|
parser.add_argument(
|
|
'--override-neuron-config',
|
|
type=json.loads,
|
|
default=None,
|
|
help="Override or set neuron device configuration. "
|
|
"e.g. {\"cast_logits_dtype\": \"bloat16\"}.'")
|
|
|
|
parser.add_argument(
|
|
'--scheduling-policy',
|
|
choices=['fcfs', 'priority'],
|
|
default="fcfs",
|
|
help='The scheduling policy to use. "fcfs" (first come first served'
|
|
', i.e. requests are handled in order of arrival; default) '
|
|
'or "priority" (requests are handled based on given '
|
|
'priority (lower value means earlier handling) and time of '
|
|
'arrival deciding any ties).')
|
|
|
|
return parser
|
|
|
|
@classmethod
|
|
def from_cli_args(cls, args: argparse.Namespace):
|
|
# Get the list of attributes of this dataclass.
|
|
attrs = [attr.name for attr in dataclasses.fields(cls)]
|
|
# Set the attributes from the parsed arguments.
|
|
engine_args = cls(**{attr: getattr(args, attr) for attr in attrs})
|
|
return engine_args
|
|
|
|
def create_model_config(self) -> ModelConfig:
|
|
return ModelConfig(
|
|
model=self.model,
|
|
task=self.task,
|
|
# We know this is not None because we set it in __post_init__
|
|
tokenizer=cast(str, self.tokenizer),
|
|
tokenizer_mode=self.tokenizer_mode,
|
|
trust_remote_code=self.trust_remote_code,
|
|
dtype=self.dtype,
|
|
seed=self.seed,
|
|
revision=self.revision,
|
|
code_revision=self.code_revision,
|
|
rope_scaling=self.rope_scaling,
|
|
rope_theta=self.rope_theta,
|
|
tokenizer_revision=self.tokenizer_revision,
|
|
max_model_len=self.max_model_len,
|
|
quantization=self.quantization,
|
|
quantization_param_path=self.quantization_param_path,
|
|
enforce_eager=self.enforce_eager,
|
|
max_context_len_to_capture=self.max_context_len_to_capture,
|
|
max_seq_len_to_capture=self.max_seq_len_to_capture,
|
|
max_logprobs=self.max_logprobs,
|
|
disable_sliding_window=self.disable_sliding_window,
|
|
skip_tokenizer_init=self.skip_tokenizer_init,
|
|
served_model_name=self.served_model_name,
|
|
limit_mm_per_prompt=self.limit_mm_per_prompt,
|
|
use_async_output_proc=not self.disable_async_output_proc,
|
|
override_neuron_config=self.override_neuron_config,
|
|
config_format=self.config_format,
|
|
mm_processor_kwargs=self.mm_processor_kwargs,
|
|
)
|
|
|
|
def create_load_config(self) -> LoadConfig:
|
|
return LoadConfig(
|
|
load_format=self.load_format,
|
|
download_dir=self.download_dir,
|
|
model_loader_extra_config=self.model_loader_extra_config,
|
|
ignore_patterns=self.ignore_patterns,
|
|
)
|
|
|
|
def create_engine_config(self) -> EngineConfig:
|
|
# gguf file needs a specific model loader and doesn't use hf_repo
|
|
if check_gguf_file(self.model):
|
|
self.quantization = self.load_format = "gguf"
|
|
|
|
# bitsandbytes quantization needs a specific model loader
|
|
# so we make sure the quant method and the load format are consistent
|
|
if (self.quantization == "bitsandbytes" or
|
|
self.qlora_adapter_name_or_path is not None) and \
|
|
self.load_format != "bitsandbytes":
|
|
raise ValueError(
|
|
"BitsAndBytes quantization and QLoRA adapter only support "
|
|
f"'bitsandbytes' load format, but got {self.load_format}")
|
|
|
|
if (self.load_format == "bitsandbytes" or
|
|
self.qlora_adapter_name_or_path is not None) and \
|
|
self.quantization != "bitsandbytes":
|
|
raise ValueError(
|
|
"BitsAndBytes load format and QLoRA adapter only support "
|
|
f"'bitsandbytes' quantization, but got {self.quantization}")
|
|
|
|
assert self.cpu_offload_gb >= 0, (
|
|
"CPU offload space must be non-negative"
|
|
f", but got {self.cpu_offload_gb}")
|
|
|
|
device_config = DeviceConfig(device=self.device)
|
|
model_config = self.create_model_config()
|
|
|
|
if model_config.is_multimodal_model:
|
|
if self.enable_prefix_caching:
|
|
logger.warning(
|
|
"--enable-prefix-caching is currently not "
|
|
"supported for multimodal models and has been disabled.")
|
|
self.enable_prefix_caching = False
|
|
|
|
maybe_register_config_serialize_by_value(self.trust_remote_code)
|
|
|
|
cache_config = CacheConfig(
|
|
# neuron needs block_size = max_model_len
|
|
block_size=self.block_size if self.device != "neuron" else
|
|
(self.max_model_len if self.max_model_len is not None else 0),
|
|
gpu_memory_utilization=self.gpu_memory_utilization,
|
|
swap_space=self.swap_space,
|
|
cache_dtype=self.kv_cache_dtype,
|
|
is_attention_free=model_config.is_attention_free,
|
|
num_gpu_blocks_override=self.num_gpu_blocks_override,
|
|
sliding_window=model_config.get_sliding_window(),
|
|
enable_prefix_caching=self.enable_prefix_caching,
|
|
cpu_offload_gb=self.cpu_offload_gb,
|
|
)
|
|
parallel_config = ParallelConfig(
|
|
pipeline_parallel_size=self.pipeline_parallel_size,
|
|
tensor_parallel_size=self.tensor_parallel_size,
|
|
worker_use_ray=self.worker_use_ray,
|
|
max_parallel_loading_workers=self.max_parallel_loading_workers,
|
|
disable_custom_all_reduce=self.disable_custom_all_reduce,
|
|
tokenizer_pool_config=TokenizerPoolConfig.create_config(
|
|
self.tokenizer_pool_size,
|
|
self.tokenizer_pool_type,
|
|
self.tokenizer_pool_extra_config,
|
|
),
|
|
ray_workers_use_nsight=self.ray_workers_use_nsight,
|
|
distributed_executor_backend=self.distributed_executor_backend)
|
|
|
|
max_model_len = model_config.max_model_len
|
|
use_long_context = max_model_len > 32768
|
|
if self.enable_chunked_prefill is None:
|
|
# If not explicitly set, enable chunked prefill by default for
|
|
# long context (> 32K) models. This is to avoid OOM errors in the
|
|
# initial memory profiling phase.
|
|
|
|
# Chunked prefill is currently disabled for multimodal models by
|
|
# default.
|
|
if use_long_context and not model_config.is_multimodal_model:
|
|
is_gpu = device_config.device_type == "cuda"
|
|
use_sliding_window = (model_config.get_sliding_window()
|
|
is not None)
|
|
use_spec_decode = self.speculative_model is not None
|
|
if (is_gpu and not use_sliding_window and not use_spec_decode
|
|
and not self.enable_lora
|
|
and not self.enable_prompt_adapter):
|
|
self.enable_chunked_prefill = True
|
|
logger.warning(
|
|
"Chunked prefill is enabled by default for models with "
|
|
"max_model_len > 32K. Currently, chunked prefill might "
|
|
"not work with some features or models. If you "
|
|
"encounter any issues, please disable chunked prefill "
|
|
"by setting --enable-chunked-prefill=False.")
|
|
if self.enable_chunked_prefill is None:
|
|
self.enable_chunked_prefill = False
|
|
|
|
if not self.enable_chunked_prefill and use_long_context:
|
|
logger.warning(
|
|
"The model has a long context length (%s). This may cause OOM "
|
|
"errors during the initial memory profiling phase, or result "
|
|
"in low performance due to small KV cache space. Consider "
|
|
"setting --max-model-len to a smaller value.", max_model_len)
|
|
|
|
speculative_config = SpeculativeConfig.maybe_create_spec_config(
|
|
target_model_config=model_config,
|
|
target_parallel_config=parallel_config,
|
|
target_dtype=self.dtype,
|
|
speculative_model=self.speculative_model,
|
|
speculative_model_quantization = \
|
|
self.speculative_model_quantization,
|
|
speculative_draft_tensor_parallel_size = \
|
|
self.speculative_draft_tensor_parallel_size,
|
|
num_speculative_tokens=self.num_speculative_tokens,
|
|
speculative_disable_mqa_scorer=self.speculative_disable_mqa_scorer,
|
|
speculative_disable_by_batch_size=self.
|
|
speculative_disable_by_batch_size,
|
|
speculative_max_model_len=self.speculative_max_model_len,
|
|
enable_chunked_prefill=self.enable_chunked_prefill,
|
|
disable_log_stats=self.disable_log_stats,
|
|
ngram_prompt_lookup_max=self.ngram_prompt_lookup_max,
|
|
ngram_prompt_lookup_min=self.ngram_prompt_lookup_min,
|
|
draft_token_acceptance_method=\
|
|
self.spec_decoding_acceptance_method,
|
|
typical_acceptance_sampler_posterior_threshold=self.
|
|
typical_acceptance_sampler_posterior_threshold,
|
|
typical_acceptance_sampler_posterior_alpha=self.
|
|
typical_acceptance_sampler_posterior_alpha,
|
|
disable_logprobs=self.disable_logprobs_during_spec_decoding,
|
|
)
|
|
|
|
# Reminder: Please update docs/source/serving/compatibility_matrix.rst
|
|
# If the feature combo become valid
|
|
if self.num_scheduler_steps > 1:
|
|
if speculative_config is not None:
|
|
raise ValueError("Speculative decoding is not supported with "
|
|
"multi-step (--num-scheduler-steps > 1)")
|
|
if self.enable_chunked_prefill and self.pipeline_parallel_size > 1:
|
|
raise ValueError("Multi-Step Chunked-Prefill is not supported "
|
|
"for pipeline-parallel-size > 1")
|
|
|
|
# make sure num_lookahead_slots is set the higher value depending on
|
|
# if we are using speculative decoding or multi-step
|
|
num_lookahead_slots = max(self.num_lookahead_slots,
|
|
self.num_scheduler_steps - 1)
|
|
num_lookahead_slots = num_lookahead_slots \
|
|
if speculative_config is None \
|
|
else speculative_config.num_lookahead_slots
|
|
|
|
if not self.use_v2_block_manager:
|
|
logger.warning(
|
|
"[DEPRECATED] Block manager v1 has been removed, "
|
|
"and setting --use-v2-block-manager to True or False has "
|
|
"no effect on vLLM behavior. Please remove "
|
|
"--use-v2-block-manager in your engine argument. "
|
|
"If your use case is not supported by "
|
|
"SelfAttnBlockSpaceManager (i.e. block manager v2),"
|
|
" please file an issue with detailed information.")
|
|
|
|
scheduler_config = SchedulerConfig(
|
|
task=model_config.task,
|
|
max_num_batched_tokens=self.max_num_batched_tokens,
|
|
max_num_seqs=self.max_num_seqs,
|
|
max_model_len=model_config.max_model_len,
|
|
num_lookahead_slots=num_lookahead_slots,
|
|
delay_factor=self.scheduler_delay_factor,
|
|
enable_chunked_prefill=self.enable_chunked_prefill,
|
|
is_multimodal_model=model_config.is_multimodal_model,
|
|
preemption_mode=self.preemption_mode,
|
|
num_scheduler_steps=self.num_scheduler_steps,
|
|
multi_step_stream_outputs=self.multi_step_stream_outputs,
|
|
send_delta_data=(envs.VLLM_USE_RAY_SPMD_WORKER
|
|
and parallel_config.use_ray),
|
|
policy=self.scheduling_policy,
|
|
)
|
|
lora_config = LoRAConfig(
|
|
max_lora_rank=self.max_lora_rank,
|
|
max_loras=self.max_loras,
|
|
fully_sharded_loras=self.fully_sharded_loras,
|
|
lora_extra_vocab_size=self.lora_extra_vocab_size,
|
|
long_lora_scaling_factors=self.long_lora_scaling_factors,
|
|
lora_dtype=self.lora_dtype,
|
|
max_cpu_loras=self.max_cpu_loras if self.max_cpu_loras
|
|
and self.max_cpu_loras > 0 else None) if self.enable_lora else None
|
|
|
|
if self.qlora_adapter_name_or_path is not None and \
|
|
self.qlora_adapter_name_or_path != "":
|
|
if self.model_loader_extra_config is None:
|
|
self.model_loader_extra_config = {}
|
|
self.model_loader_extra_config[
|
|
"qlora_adapter_name_or_path"] = self.qlora_adapter_name_or_path
|
|
|
|
load_config = self.create_load_config()
|
|
|
|
prompt_adapter_config = PromptAdapterConfig(
|
|
max_prompt_adapters=self.max_prompt_adapters,
|
|
max_prompt_adapter_token=self.max_prompt_adapter_token) \
|
|
if self.enable_prompt_adapter else None
|
|
|
|
decoding_config = DecodingConfig(
|
|
guided_decoding_backend=self.guided_decoding_backend)
|
|
|
|
detailed_trace_modules = []
|
|
if self.collect_detailed_traces is not None:
|
|
detailed_trace_modules = self.collect_detailed_traces.split(",")
|
|
for m in detailed_trace_modules:
|
|
if m not in ALLOWED_DETAILED_TRACE_MODULES:
|
|
raise ValueError(
|
|
f"Invalid module {m} in collect_detailed_traces. "
|
|
f"Valid modules are {ALLOWED_DETAILED_TRACE_MODULES}")
|
|
observability_config = ObservabilityConfig(
|
|
otlp_traces_endpoint=self.otlp_traces_endpoint,
|
|
collect_model_forward_time="model" in detailed_trace_modules
|
|
or "all" in detailed_trace_modules,
|
|
collect_model_execute_time="worker" in detailed_trace_modules
|
|
or "all" in detailed_trace_modules,
|
|
)
|
|
|
|
return EngineConfig(
|
|
model_config=model_config,
|
|
cache_config=cache_config,
|
|
parallel_config=parallel_config,
|
|
scheduler_config=scheduler_config,
|
|
device_config=device_config,
|
|
lora_config=lora_config,
|
|
speculative_config=speculative_config,
|
|
load_config=load_config,
|
|
decoding_config=decoding_config,
|
|
observability_config=observability_config,
|
|
prompt_adapter_config=prompt_adapter_config,
|
|
)
|
|
|
|
|
|
@dataclass
|
|
class AsyncEngineArgs(EngineArgs):
|
|
"""Arguments for asynchronous vLLM engine."""
|
|
disable_log_requests: bool = False
|
|
|
|
@staticmethod
|
|
def add_cli_args(parser: FlexibleArgumentParser,
|
|
async_args_only: bool = False) -> FlexibleArgumentParser:
|
|
if not async_args_only:
|
|
parser = EngineArgs.add_cli_args(parser)
|
|
parser.add_argument('--disable-log-requests',
|
|
action='store_true',
|
|
help='Disable logging requests.')
|
|
return parser
|
|
|
|
|
|
class StoreBoolean(argparse.Action):
|
|
|
|
def __call__(self, parser, namespace, values, option_string=None):
|
|
if values.lower() == "true":
|
|
setattr(namespace, self.dest, True)
|
|
elif values.lower() == "false":
|
|
setattr(namespace, self.dest, False)
|
|
else:
|
|
raise ValueError(f"Invalid boolean value: {values}. "
|
|
"Expected 'true' or 'false'.")
|
|
|
|
|
|
# These functions are used by sphinx to build the documentation
|
|
def _engine_args_parser():
|
|
return EngineArgs.add_cli_args(FlexibleArgumentParser())
|
|
|
|
|
|
def _async_engine_args_parser():
|
|
return AsyncEngineArgs.add_cli_args(FlexibleArgumentParser(),
|
|
async_args_only=True)
|