aphrodite-engine/aphrodite/engine/args_tools.py

import argparse
import dataclasses
import json
from dataclasses import dataclass
from typing import TYPE_CHECKING, List, Optional, Tuple, Type, Union

from aphrodite.common.config import (CacheConfig, DecodingConfig, DeviceConfig,
                                     EngineConfig, LoadConfig, LoRAConfig,
                                     ModelConfig, MultiModalConfig,
                                     ParallelConfig, PromptAdapterConfig,
                                     SchedulerConfig, SpeculativeConfig,
                                     TokenizerPoolConfig)
from aphrodite.common.utils import FlexibleArgumentParser, is_cpu
from aphrodite.executor.executor_base import ExecutorBase
from aphrodite.quantization import QUANTIZATION_METHODS

if TYPE_CHECKING:
    from aphrodite.transformers_utils.tokenizer_group.base_tokenizer_group import \
        BaseTokenizerGroup  # noqa: E501


@dataclass
class EngineArgs:
    """Arguments for Aphrodite engine."""

    model: str
    served_model_name: Optional[Union[List[str]]] = None
    tokenizer: Optional[str] = None
    skip_tokenizer_init: bool = False
    tokenizer_mode: str = "auto"
    trust_remote_code: bool = False
    download_dir: Optional[str] = None
    load_format: str = "auto"
    dtype: str = "auto"
    kv_cache_dtype: str = "auto"
    quantization_param_path: Optional[str] = None
    seed: int = 0
    max_model_len: Optional[int] = None
    worker_use_ray: Optional[bool] = False
    # Note: Specifying a custom executor backend by passing a class
    # is intended for expert use only. The API may change without
    # notice.
    distributed_executor_backend: Optional[Union[str,
                                                 Type[ExecutorBase]]] = None
    pipeline_parallel_size: int = 1
    tensor_parallel_size: int = 1
    max_parallel_loading_workers: Optional[int] = None
    block_size: int = 16
    enable_prefix_caching: bool = False
    disable_sliding_window: bool = False
    use_v2_block_manager: bool = False
    swap_space: int = 4  # GiB
    cpu_offload_gb: int = 0  # GiB
    gpu_memory_utilization: float = 0.90
    max_num_batched_tokens: Optional[int] = None
    max_num_seqs: int = 256
    max_logprobs: int = 10  # OpenAI default is 5, setting to 10 because ST
    disable_log_stats: bool = False
    revision: Optional[str] = None
    code_revision: Optional[str] = None
    rope_scaling: Optional[dict] = None
    rope_theta: Optional[float] = None
    tokenizer_revision: Optional[str] = None
    quantization: Optional[str] = None
    load_in_4bit: bool = False
    load_in_8bit: bool = False
    load_in_smooth: bool = False
    deepspeed_fp_bits: Optional[int] = None
    enforce_eager: bool = True
    max_context_len_to_capture: Optional[int] = None
    max_seq_len_to_capture: int = 8192
    disable_custom_all_reduce: bool = False
    tokenizer_pool_size: int = 0
    # Note: Specifying a tokenizer pool by passing a class
    # is intended for expert use only. The API may change without
    # notice.
    tokenizer_pool_type: Union[str, Type["BaseTokenizerGroup"]] = "ray"
    tokenizer_pool_extra_config: Optional[dict] = None
    enable_lora: bool = False
    max_loras: int = 1
    max_lora_rank: int = 16
    enable_prompt_adapter: bool = False
    max_prompt_adapters: int = 1
    max_prompt_adapter_token: int = 0
    fully_sharded_loras: bool = False
    lora_extra_vocab_size: int = 256
    long_lora_scaling_factors: Optional[Tuple[float]] = None
    lora_dtype: str = "auto"
    max_cpu_loras: Optional[int] = None
    device: str = "auto"
    ray_workers_use_nsight: bool = False
    num_gpu_blocks_override: Optional[int] = None
    num_lookahead_slots: int = 0
    model_loader_extra_config: Optional[dict] = None
    preemption_mode: Optional[str] = None
    # Scheduler config
    scheduler_delay_factor: float = 0.0
    enable_chunked_prefill: bool = False
    guided_decoding_backend: str = 'outlines'
    # Speculative decoding config
    speculative_model: Optional[str] = None
    speculative_draft_tensor_parallel_size: Optional[int] = None
    num_speculative_tokens: Optional[int] = None
    speculative_max_model_len: Optional[int] = None
    speculative_disable_by_batch_size: Optional[int] = None
    ngram_prompt_lookup_max: Optional[int] = None
    ngram_prompt_lookup_min: Optional[int] = None
    spec_decoding_acceptance_method: str = 'rejection_sampler'
    typical_acceptance_sampler_posterior_threshold: Optional[float] = None
    typical_acceptance_sampler_posterior_alpha: Optional[float] = None
    disable_logprobs_during_spec_decoding: Optional[bool] = None

    qlora_adapter_name_or_path: Optional[str] = None

    def __post_init__(self):
        if self.tokenizer is None:
            self.tokenizer = self.model
        if is_cpu():
            self.distributed_executor_backend = None

    @staticmethod
    def add_cli_args(parser: FlexibleArgumentParser) -> FlexibleArgumentParser:
        """Shared CLI arguments for the Aphrodite engine."""

        # NOTE: If you update any of the arguments below, please also
        # make sure to update docs/source/models/engine_args.rst

        # Model arguments
        parser.add_argument(
            "--model",
            type=str,
            default="EleutherAI/pythia-70m-deduped",
            help="name or path of the huggingface model to use",
        )
        parser.add_argument(
            "--tokenizer",
            type=str,
            default=EngineArgs.tokenizer,
            help="name or path of the huggingface tokenizer to use",
        )
        parser.add_argument(
            "--skip-tokenizer-init",
            action="store_true",
            help="Skip initialization of tokenizer and detokenizer")
        parser.add_argument(
            "--revision",
            type=str,
            default=None,
            help="the specific model version to use. It can be a branch "
            "name, a tag name, or a commit id. If unspecified, will use "
            "the default version.",
        )
        parser.add_argument(
            "--code-revision",
            type=str,
            default=None,
            help="the specific revision to use for the model code on "
            "Hugging Face Hub. It can be a branch name, a tag name, or a "
            "commit id. If unspecified, will use the default version.",
        )
        parser.add_argument(
            "--tokenizer-revision",
            type=str,
            default=None,
            help="the specific tokenizer version to use. It can be a branch "
            "name, a tag name, or a commit id. If unspecified, will use "
            "the default version.",
        )
        parser.add_argument(
            "--tokenizer-mode",
            type=str,
            default=EngineArgs.tokenizer_mode,
            choices=["auto", "slow"],
            help='tokenizer mode. "auto" will use the fast '
            'tokenizer if available, and "slow" will '
            "always use the slow tokenizer.",
        )
        parser.add_argument(
            "--trust-remote-code",
            action="store_true",
            help="trust remote code from huggingface",
        )
        parser.add_argument(
            "--download-dir",
            type=str,
            default=EngineArgs.download_dir,
            help="directory to download and load the weights, "
            "default to the default cache dir of "
            "huggingface",
        )
        parser.add_argument(
            '--load-format',
            type=str,
            default=EngineArgs.load_format,
            choices=[
                'auto',
                'pt',
                'safetensors',
                'npcache',
                'dummy',
                'tensorizer',
                'sharded_state',
                'bitsandbytes',
            ],
            help='The format of the model weights to load.\n\n'
            '* "auto" will try to load the weights in the safetensors format '
            'and fall back to the pytorch bin format if safetensors format '
            'is not available.\n'
            '* "pt" will load the weights in the pytorch bin format.\n'
            '* "safetensors" will load the weights in the safetensors format.\n'
            '* "npcache" will load the weights in pytorch format and store '
            'a numpy cache to speed up the loading.\n'
            '* "dummy" will initialize the weights with random values, '
            'which is mainly for profiling.\n'
            '* "tensorizer" will load the weights using tensorizer from '
            'CoreWeave. See the Tensorize Aphrodite Model script in the '
            'Examples section for more information.\n'
            '* "bitsandbytes" will load the weights using bitsandbytes '
            'quantization.\n')
        parser.add_argument(
            '--dtype',
            type=str,
            default=EngineArgs.dtype,
            choices=[
                'auto', 'half', 'float16', 'bfloat16', 'float', 'float32'
            ],
            help='Data type for model weights and activations.\n\n'
            '* "auto" will use FP16 precision for FP32 and FP16 models, and '
            'BF16 precision for BF16 models.\n'
            '* "half" for FP16. Recommended for AWQ quantization.\n'
            '* "float16" is the same as "half".\n'
            '* "bfloat16" for a balance between precision and range.\n'
            '* "float" is shorthand for FP32 precision.\n'
            '* "float32" for FP32 precision.')
        parser.add_argument(
            '--kv-cache-dtype',
            type=str,
            choices=['auto', 'fp8', 'fp8_e5m2', 'fp8_e4m3'],
            default=EngineArgs.kv_cache_dtype,
            help='Data type for kv cache storage. If "auto", will use model '
            'data type. CUDA 11.8+ supports fp8 (=fp8_e4m3) and fp8_e5m2. '
            'ROCm (AMD GPU) supports fp8 (=fp8_e4m3)')
        parser.add_argument(
            '--quantization-param-path',
            type=str,
            default=None,
            help='Path to the JSON file containing the KV cache '
            'scaling factors. This should generally be supplied, when '
            'KV cache dtype is FP8. Otherwise, KV cache scaling factors '
            'default to 1.0, which may cause accuracy issues. '
            'FP8_E5M2 (without scaling) is only supported on cuda version'
            'greater than 11.8. On ROCm (AMD GPU), FP8_E4M3 is instead '
            'supported for common inference criteria. ')
        parser.add_argument(
            "--max-model-len",
            type=int,
            default=EngineArgs.max_model_len,
            help="model context length. If unspecified, "
            "will be automatically derived from the model.",
        )
        parser.add_argument(
            '--guided-decoding-backend',
            type=str,
            default='outlines',
            choices=['outlines', 'lm-format-enforcer'],
            help='Which engine will be used for guided decoding'
            ' (JSON schema / regex etc) by default. Currently support '
            'https://github.com/outlines-dev/outlines and '
            'https://github.com/noamgat/lm-format-enforcer.'
            ' Can be overridden per request via guided_decoding_backend'
            ' parameter.')
        # Parallel arguments
        parser.add_argument(
            '--distributed-executor-backend',
            choices=['ray', 'mp'],
            default=EngineArgs.distributed_executor_backend,
            help='Backend to use for distributed serving. When more than 1 GPU '
            'is used, will be automatically set to "ray" if installed '
            'or "mp" (multiprocessing) otherwise.')
        parser.add_argument(
            '--worker-use-ray',
            action='store_true',
            help='Deprecated, use --distributed-executor-backend=ray.')
        parser.add_argument(
            "--pipeline-parallel-size",
            "-pp",
            type=int,
            default=EngineArgs.pipeline_parallel_size,
            help="number of pipeline stages. Currently not supported.")
        parser.add_argument(
            "--tensor-parallel-size",
            "-tp",
            type=int,
            default=EngineArgs.tensor_parallel_size,
            help="number of tensor parallel replicas, i.e. the number of GPUs "
            "to use.")
        parser.add_argument(
            "--max-parallel-loading-workers",
            type=int,
            default=EngineArgs.max_parallel_loading_workers,
            help="load model sequentially in multiple batches, "
            "to avoid RAM OOM when using tensor "
            "parallel and large models",
        )
        parser.add_argument(
            "--ray-workers-use-nsight",
            action="store_true",
            help="If specified, use nsight to profile ray workers",
        )
        # KV cache arguments
        parser.add_argument(
            "--block-size",
            type=int,
            default=EngineArgs.block_size,
            choices=[8, 16, 32],
            help="token block size",
        )
        parser.add_argument(
            "--enable-prefix-caching",
            "--context-shift",
            action="store_true",
            help="Enable automatic prefix caching.",
        )
        parser.add_argument('--disable-sliding-window',
                            action='store_true',
                            help='Disables sliding window, '
                            'capping to sliding window size')
        parser.add_argument("--use-v2-block-manager",
                            action="store_true",
                            help="Use the v2 block manager.")
        parser.add_argument(
            "--num-lookahead-slots",
            type=int,
            default=EngineArgs.num_lookahead_slots,
            help="Experimental scheduling config necessary for "
            "speculative decoding. This will be replaced by "
            "speculative decoding config in the future; it is "
            "present for testing purposes until then.")
        parser.add_argument("--seed",
                            type=int,
                            default=EngineArgs.seed,
                            help="random seed")
        parser.add_argument(
            "--swap-space",
            type=int,
            default=EngineArgs.swap_space,
            help="CPU swap space size (GiB) per GPU",
        )
        parser.add_argument(
            '--cpu-offload-gb',
            type=float,
            default=0,
            help='The space in GiB to offload to CPU, per GPU. '
            'Default is 0, which means no offloading. Intuitively, '
            'this argument can be seen as a virtual way to increase '
            'the GPU memory size. For example, if you have one 24 GB '
            'GPU and set this to 10, virtually you can think of it as '
            'a 34 GB GPU. Then you can load a 13B model with BF16 weight,'
            'which requires at least 26GB GPU memory. Note that this '
            'requires fast CPU-GPU interconnect, as part of the model is'
            'loaded from CPU memory to GPU memory on the fly in each '
            'model forward pass.')
        parser.add_argument(
            "--gpu-memory-utilization",
            "-gmu",
            type=float,
            default=EngineArgs.gpu_memory_utilization,
            help="the fraction of GPU memory to be used for "
            "the model executor, which can range from 0 to 1."
            "If unspecified, will use the default value of 0.9.",
        )
        parser.add_argument(
            "--num-gpu-blocks-override",
            type=int,
            default=None,
            help="If specified, ignore GPU profiling result and use this "
            "number of GPU blocks. Used for testing preemption.")
        parser.add_argument(
            "--max-num-batched-tokens",
            type=int,
            default=EngineArgs.max_num_batched_tokens,
            help="maximum number of batched tokens per "
            "iteration",
        )
        parser.add_argument(
            "--max-num-seqs",
            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="maximum number of log probabilities to "
            "return.",
        )
        parser.add_argument(
            "--disable-log-stats",
            action="store_true",
            help="disable logging statistics",
        )
        # Quantization settings.
        parser.add_argument(
            "--quantization",
            "-q",
            type=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(
            "--load-in-4bit",
            action="store_true",
            help="Load the FP16 model in 4-bit format. Also "
            "works with AWQ models. Throughput at 2.5x of "
            "FP16.",
        )
        parser.add_argument(
            "--load-in-8bit",
            action="store_true",
            help="Load the FP16 model in 8-bit format. "
            "Throughput at 0.3x of FP16.",
        )
        parser.add_argument(
            "--load-in-smooth",
            action="store_true",
            help="Load the FP16 model in smoothquant "
            "8bit format. Throughput at 0.7x of FP16. ",
        )
        parser.add_argument(
            "--deepspeed-fp-bits",
            type=int,
            default=None,
            help="Number of floating bits to use for the deepseed "
            "quantization. Supported bits are: 4, 6, 8, 12. ")
        parser.add_argument('--rope-scaling',
                            default=None,
                            type=json.loads,
                            help='RoPE scaling configuration in JSON format. '
                            'For example, {"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",
            type=lambda x: (str(x).lower() == 'true'),
            default=EngineArgs.enforce_eager,
            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.")
        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="The type of tokenizer pool to use for "
                            "asynchronous tokenization. Ignored if "
                            "tokenizer_pool_size is 0.")
        parser.add_argument("--tokenizer-pool-extra-config",
                            type=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.")
        parser.add_argument(
            '--preemption-mode',
            type=str,
            default=None,
            help='If \'recompute\', the engine performs preemption by block '
            'swapping; If \'swap\', the engine performs preemption by block '
            'swapping.')
        # 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=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=[
                "auto", "cuda", "neuron", "cpu", "openvino", "tpu", "xpu"
            ],
            help=("Device to use for model execution."),
        )
        parser.add_argument(
            "--scheduler-delay-factor",
            "-sdf",
            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="store_true",
            help="If True, the prefill requests can be chunked based on the "
            "max_num_batched_tokens.")
        parser.add_argument(
            "--speculative-model",
            type=str,
            default=EngineArgs.speculative_model,
            help=
            "The name of the draft model to be used in speculative decoding.")
        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(
            "--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-max-model-len",
            type=str,
            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',
            type=bool,
            default=EngineArgs.disable_logprobs_during_spec_decoding,
            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=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(
            "--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 LoRA adapter to use.")

        return parser

    @classmethod
    def from_cli_args(cls, args: argparse.Namespace) -> "EngineArgs":
        # 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_engine_config(self, ) -> EngineConfig:

        # 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}")

        multimodal_config = MultiModalConfig()

        device_config = DeviceConfig(device=self.device)

        model_config = ModelConfig(
            model=self.model,
            tokenizer=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,
            load_in_4bit=self.load_in_4bit,
            load_in_8bit=self.load_in_8bit,
            load_in_smooth=self.load_in_smooth,
            deepspeed_fp_bits=self.deepspeed_fp_bits,
            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,
            multimodal_config=multimodal_config,
        )

        cache_config = CacheConfig(
            block_size=self.block_size,
            gpu_memory_utilization=self.gpu_memory_utilization,
            swap_space=self.swap_space,
            cache_dtype=self.kv_cache_dtype,
            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(
                tokenizer_pool_size=self.tokenizer_pool_size,
                tokenizer_pool_type=self.tokenizer_pool_type,
                tokenizer_pool_extra_config=self.tokenizer_pool_extra_config,
            ),
            ray_workers_use_nsight=self.ray_workers_use_nsight,
            distributed_executor_backend=self.distributed_executor_backend)

        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_draft_tensor_parallel_size=self.
            speculative_draft_tensor_parallel_size,
            num_speculative_tokens=self.num_speculative_tokens,
            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,
            use_v2_block_manager=self.use_v2_block_manager,
            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,
        )

        scheduler_config = SchedulerConfig(
            max_num_batched_tokens=self.max_num_batched_tokens,
            max_num_seqs=self.max_num_seqs,
            max_model_len=model_config.max_model_len,
            use_v2_block_manager=self.use_v2_block_manager,
            num_lookahead_slots=(self.num_lookahead_slots
                                 if speculative_config is None else
                                 speculative_config.num_lookahead_slots),
            delay_factor=self.scheduler_delay_factor,
            enable_chunked_prefill=self.enable_chunked_prefill,
            embedding_mode=model_config.embedding_mode,
            preemption_mode=self.preemption_mode,
        )

        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 = LoadConfig(
            load_format=self.load_format,
            download_dir=self.download_dir,
            model_loader_extra_config=self.model_loader_extra_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)

        if (model_config.get_sliding_window() is not None
                and scheduler_config.chunked_prefill_enabled
                and not scheduler_config.use_v2_block_manager):
            raise ValueError(
                "Chunked prefill is not supported with sliding window. "
                "Set --disable-sliding-window to disable sliding window.")

        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,
                            multimodal_config=multimodal_config,
                            speculative_config=speculative_config,
                            load_config=load_config,
                            decoding_config=decoding_config,
                            prompt_adapter_config=prompt_adapter_config)


@dataclass
class AsyncEngineArgs(EngineArgs):
    """Arguments for asynchronous Aphrodite engine."""

    engine_use_ray: bool = False
    disable_log_requests: bool = False
    max_log_len: int = 0
    uvloop: 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('--engine-use-ray',
                            action='store_true',
                            help='Use Ray to start the LLM engine in a '
                            'separate process as the server process.')
        parser.add_argument('--disable-log-requests',
                            action='store_true',
                            help='Disable logging requests.')
        parser.add_argument('--max-log-len',
                            type=int,
                            default=0,
                            help='Max number of prompt characters or prompt '
                            'ID numbers being printed in log.'
                            '\n\nDefault: Unlimited')
        parser.add_argument(
            "--uvloop",
            action="store_true",
            help="Use the Uvloop asyncio event loop to possibly increase "
            "performance")
        return parser