595e7c0032
Signed-off-by: Chenguang ZHENG <645327136@qq.com> Signed-off-by: yinpeiqi <yinpeiqi809@gmail.com> Co-authored-by: yinpeiqi <yinpeiqi809@gmail.com> Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>
1242 lines
53 KiB
Python
1242 lines
53 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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import asyncio
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import multiprocessing as mp
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import os
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import time
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import uuid
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from collections.abc import AsyncGenerator, Iterable, Mapping, Sequence
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from concurrent.futures import ThreadPoolExecutor, as_completed
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from dataclasses import asdict
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from pprint import pformat
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from typing import Any
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from omegaconf import OmegaConf
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from vllm.config import VllmConfig
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from vllm.inputs import PromptType
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from vllm.inputs.preprocess import InputPreprocessor
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from vllm.logger import init_logger
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from vllm.lora.request import LoRARequest
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from vllm.plugins.io_processors import get_io_processor
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from vllm.sampling_params import SamplingParams
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from vllm.tokenizers import TokenizerLike, init_tokenizer_from_config
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from vllm.v1.engine.exceptions import EngineDeadError
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# Internal imports (our code)
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from vllm_omni.config import OmniModelConfig
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from vllm_omni.diffusion.data import DiffusionParallelConfig
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from vllm_omni.diffusion.request import OmniDiffusionRequest
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from vllm_omni.distributed.omni_connectors import (
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get_stage_connector_config,
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initialize_orchestrator_connectors,
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)
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from vllm_omni.distributed.omni_connectors.adapter import try_send_via_connector
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from vllm_omni.distributed.ray_utils.utils import (
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create_placement_group,
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get_ray_queue_class,
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try_close_ray,
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)
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from vllm_omni.engine.input_processor import OmniInputProcessor
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from vllm_omni.entrypoints.client_request_state import ClientRequestState
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from vllm_omni.entrypoints.log_utils import (
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OrchestratorMetrics,
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)
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from vllm_omni.entrypoints.omni_stage import OmniStage
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from vllm_omni.entrypoints.stage_utils import maybe_load_from_ipc as _load
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from vllm_omni.entrypoints.utils import (
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get_final_stage_id_for_e2e,
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load_stage_configs_from_model,
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load_stage_configs_from_yaml,
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resolve_model_config_path,
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)
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from vllm_omni.outputs import OmniRequestOutput
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logger = init_logger(__name__)
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def _dummy_snapshot_download(model_id):
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return model_id
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def omni_snapshot_download(model_id) -> str:
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# TODO: this is just a workaround for quickly use modelscope, we should support
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# modelscope in weight loading feature instead of using `snapshot_download`
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if os.environ.get("VLLM_USE_MODELSCOPE", False):
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from modelscope.hub.snapshot_download import snapshot_download
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return snapshot_download(model_id)
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else:
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return _dummy_snapshot_download(model_id)
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class AsyncOmni:
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"""Asynchronous unified entry point supporting multi-stage pipelines for LLM and Diffusion models.
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Similar to the Omni class, but provides an asynchronous interface supporting
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asynchronous LLM and Diffusion models.
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Args:
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*args: Variable length argument list.
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- args[0] (str): Model name or path to load.
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**kwargs: Arbitrary keyword arguments.
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- model (str): Model name or path to load (if not in args).
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- stage_configs_path: Optional path to YAML file containing stage
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configurations. If None, configurations are loaded from the model.
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- log_stats: Whether to enable statistics logging
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be written to files with stage-specific suffixes.
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- init_sleep_seconds: Number of seconds to sleep between starting
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each stage process during initialization
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- shm_threshold_bytes: Threshold in bytes for using shared memory
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for IPC. Objects larger than this threshold will use shared memory.
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- batch_timeout: Timeout in seconds for batching requests within a stage
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- init_timeout: Timeout in seconds for waiting for all stages to initialize
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- Additional keyword arguments passed to stage engines.
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Example:
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>>> async_llm = AsyncOmni(model="Qwen/Qwen2.5-Omni-7B")
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>>> async for output in async_llm.generate(
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... prompt="Hello",
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... request_id="req-1",
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... sampling_params_list=[SamplingParams(), SamplingParams()]
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... ):
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... print(output)
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"""
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def __init__(self, *args: Any, **kwargs: dict[str, Any]) -> None:
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model = args[0] if args else kwargs.get("model", "")
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assert model != "", "Null model id detected, please specify a model id."
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model = omni_snapshot_download(model)
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if args:
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args[0] = model
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elif kwargs.get("model", "") != "":
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kwargs["model"] = model
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# Stage management attributes
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self.stage_list: list[OmniStage] = []
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self._stage_in_queues: list[mp.Queue] = []
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self._stage_out_queues: list[mp.Queue] = []
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self._stages_ready: set[int] = set()
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self._ray_pg = None
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self._queue_cls = None
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self._ctx = None
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# Pause/resume control attributes
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self._pause_cond: asyncio.Condition = asyncio.Condition()
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self._paused: bool = False
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# Request state tracking
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self.request_states: dict[str, ClientRequestState] = {}
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self.output_handler: asyncio.Task | None = None
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# Initialize stages - each stage will create appropriate instances based on stage_type
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# Stage workers will automatically create AsyncOmniLLM or AsyncOmniDiffusion instances
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# based on stage_type in YAML config (handled in omni_stage.py)
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logger.info(f"Initializing async stages for model: {model}")
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# Use kwargs-based initialization logic to avoid conflicts with old _initialize_stages signature
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self._initialize_stages_from_kwargs(model, kwargs)
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def _initialize_stages_from_kwargs(self, model: str, kwargs: dict[str, Any]) -> None:
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"""Initialize stage list management.
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Each stage will create appropriate instances (AsyncOmniLLM or AsyncOmniDiffusion)
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based on stage_type in YAML config.
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"""
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init_sleep_seconds = kwargs.get("init_sleep_seconds", 20)
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shm_threshold_bytes = kwargs.get("shm_threshold_bytes", 65536)
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init_timeout = kwargs.get("init_timeout", 300)
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worker_backend = kwargs.get("worker_backend", "multi_process")
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ray_address = kwargs.get("ray_address", None)
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batch_timeout = kwargs.get("batch_timeout", 10)
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stage_configs_path = kwargs.get("stage_configs_path", None)
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log_stats = kwargs.get("log_stats", False)
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# Load stage configs from YAML
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if stage_configs_path is None:
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self.config_path = resolve_model_config_path(model)
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self.stage_configs = load_stage_configs_from_model(model)
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if not self.stage_configs:
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default_stage_cfg = [
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{
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"stage_id": 0,
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"stage_type": "diffusion",
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"runtime": {
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"process": True,
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"devices": "0",
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"max_batch_size": 1,
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},
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"engine_args": {
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"parallel_config": DiffusionParallelConfig(
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pipeline_parallel_size=1,
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data_parallel_size=1,
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tensor_parallel_size=1,
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sequence_parallel_size=1,
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ulysses_degree=1,
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ring_degree=1,
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cfg_parallel_size=1,
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),
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"vae_use_slicing": kwargs.get("vae_use_slicing", False),
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"vae_use_tiling": kwargs.get("vae_use_tiling", False),
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"cache_backend": kwargs.get("cache_backend", "none"),
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"cache_config": kwargs.get("cache_config", None),
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},
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"final_output": True,
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"final_output_type": "image",
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}
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]
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default_stage_cfg[0]["engine_args"]["model_stage"] = "diffusion"
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self.stage_configs = OmegaConf.create(default_stage_cfg)
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else:
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self.config_path = stage_configs_path
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self.stage_configs = load_stage_configs_from_yaml(stage_configs_path)
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# Initialize connectors
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self.omni_transfer_config, self.connectors = initialize_orchestrator_connectors(
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self.config_path, worker_backend=worker_backend, shm_threshold_bytes=shm_threshold_bytes
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)
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# Initialize stats paths
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self._enable_stats: bool = bool(log_stats)
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self.worker_backend = worker_backend
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self.ray_address = ray_address
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self.batch_timeout = batch_timeout
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# Build OmniStage instances in parallel, preserving original order
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def _build_stage(idx_cfg: tuple[int, Any]) -> tuple[int, OmniStage]:
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idx, cfg = idx_cfg
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return idx, OmniStage(cfg)
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with ThreadPoolExecutor(max_workers=min(len(self.stage_configs), max(1, os.cpu_count() or 1))) as executor:
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futures = [executor.submit(_build_stage, (idx, cfg)) for idx, cfg in enumerate(self.stage_configs)]
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results: list[tuple[int, OmniStage]] = []
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for fut in as_completed(futures):
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results.append(fut.result())
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results.sort(key=lambda x: x[0])
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self.stage_list = [st for _, st in results]
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self.default_sampling_params_list = [st.default_sampling_params for st in self.stage_list]
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self.output_modalities = [st.final_output_type for st in self.stage_list]
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logger.debug("[AsyncOrchestrator] Loaded %d stages", len(self.stage_list))
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if self.worker_backend == "ray":
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self._queue_cls = get_ray_queue_class()
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else:
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self._ctx = mp.get_context("spawn")
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self._queue_cls = lambda: self._ctx.Queue(maxsize=0)
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self._init_sleep_seconds = max(0, int(init_sleep_seconds))
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self._shm_threshold_bytes = max(0, int(shm_threshold_bytes))
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self._start_stages(model)
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# Wait for all stages to report readiness before seeding
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self._wait_for_stages_ready(timeout=init_timeout)
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def _start_stages(self, model: str) -> None:
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"""Start all stage processes."""
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if self.worker_backend == "ray":
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# Initialize Ray cluster
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self._ray_pg = create_placement_group(
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number_of_stages=len(self.stage_list), address=self.ray_address, strategy="PACK"
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)
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for stage_id, stage in enumerate(self.stage_list):
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in_q = self._queue_cls()
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out_q = self._queue_cls()
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self._stage_in_queues.append(in_q)
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self._stage_out_queues.append(out_q)
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stage.attach_queues(in_q, out_q)
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stage_connectors_config = get_stage_connector_config(
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self.omni_transfer_config,
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stage_id,
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)
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stage.init_stage_worker(
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model,
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shm_threshold_bytes=self._shm_threshold_bytes,
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ctx=self._ctx if self.worker_backend != "ray" else None,
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batch_timeout=self.batch_timeout,
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connectors_config=stage_connectors_config,
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worker_backend=self.worker_backend,
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ray_placement_group=self._ray_pg,
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)
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logger.debug("[AsyncOrchestrator] Stage-%s process started", stage_id)
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time.sleep(self._init_sleep_seconds)
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def _wait_for_stages_ready(self, timeout: int = 120) -> None:
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"""Wait for all stages to report readiness."""
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deadline = time.time() + max(0, int(timeout))
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num_stages = len(self.stage_list)
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while len(self._stages_ready) < num_stages and time.time() < deadline:
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progressed = False
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for stage_id, stage in enumerate(self.stage_list):
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if stage_id in self._stages_ready:
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continue
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result = stage.try_collect()
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if result is None:
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continue
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progressed = True
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if result.get("type") == "stage_ready":
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self._stages_ready.add(stage_id)
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# Store vllm_config received from worker process (may be None for diffusion stages)
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vllm_config = result.get("vllm_config")
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if vllm_config is not None:
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stage.set_vllm_config(vllm_config)
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tokenizer = result.get("tokenizer")
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if tokenizer is not None:
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stage.set_tokenizer(tokenizer)
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is_tracing_enabled = result.get("is_tracing_enabled")
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if is_tracing_enabled is not None:
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stage.set_is_tracing_enabled(is_tracing_enabled)
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logger.info("[AsyncOrchestrator] Stage-%s reported ready", stage_id)
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else:
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# No user data should arrive before seeding; ignore other messages
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pass
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if not progressed:
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time.sleep(0.01)
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if len(self._stages_ready) < num_stages:
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not_ready = sorted(set(range(num_stages)) - set(self._stages_ready))
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logger.warning(
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"[AsyncOrchestrator] Initialization timeout: only %s/%s stages are ready; not ready: %s",
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len(self._stages_ready),
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num_stages,
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not_ready,
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)
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# Provide actionable suggestions before shutdown
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try:
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suggestions = [
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"Verify GPU/device assignment in config (runtime.devices) is correct.",
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"Check GPU/host memory availability; reduce model or batch size if needed.",
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"Check model weights path and network reachability (if loading remotely).",
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"Increase initialization wait time (init_sleep_seconds or call-site timeout).",
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]
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logger.error(
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"[AsyncOrchestrator] Stage initialization failed, shutting down. Suggestions:\n- %s",
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"\n- ".join(suggestions),
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)
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except Exception:
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# Best-effort logging of suggestions
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logger.error(
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"[AsyncOrchestrator] Stage initialization failed and an error occurred while logging suggestions",
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)
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elif len(self._stages_ready) == num_stages:
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logger.info("[AsyncOrchestrator] All stages initialized successfully")
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# Initialize input_processor, io_processor, and model_config for API server compatibility
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# Find the first LLM stage (with vllm_config) to get vllm_config and tokenizer
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for stage in self.stage_list:
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if stage.vllm_config is not None and stage.tokenizer is not None:
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try:
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vllm_config = stage.vllm_config
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tokenizer = stage.tokenizer
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# Initialize input_processor
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self.input_processor = OmniInputProcessor(
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vllm_config=vllm_config,
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tokenizer=tokenizer,
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)
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# Initialize model_config
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self.model_config = vllm_config.model_config
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# Initialize io_processor
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io_processor_plugin = self.model_config.io_processor_plugin
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self.io_processor = get_io_processor(vllm_config, io_processor_plugin)
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logger.info(
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"[AsyncOrchestrator] Initialized input_processor, "
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"io_processor, and model_config from stage-%s",
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stage.stage_id,
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)
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break
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except Exception as e:
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logger.warning(
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"[AsyncOrchestrator] Failed to initialize processors from stage-%s: %s",
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stage.stage_id,
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e,
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)
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# If no LLM stage found, set processors to None
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if not hasattr(self, "input_processor") or self.input_processor is None:
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logger.warning(
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"[AsyncOrchestrator] No LLM stage found, processors will not be available. "
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"This may cause issues with OpenAIServingModels."
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)
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self.input_processor = None
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self.io_processor = None
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self.model_config = None
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async def _run_generation_async(
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self,
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prompts: PromptType | Sequence[PromptType] | OmniDiffusionRequest | Sequence[OmniDiffusionRequest],
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sampling_params_list: Any | Sequence[Any] | None = None,
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) -> AsyncGenerator[OmniRequestOutput, None]:
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"""Asynchronously run pipeline generation."""
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logger.debug("[AsyncOrchestrator] generate() called")
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if sampling_params_list is None:
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raise ValueError("sampling_params_list is required for pipelined generation")
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# Normalize sampling_params_list to a list
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if not isinstance(sampling_params_list, (list, tuple)):
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sampling_params_list = [sampling_params_list]
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else:
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sampling_params_list = list(sampling_params_list)
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if len(sampling_params_list) != len(self.stage_list):
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raise ValueError(f"Expected {len(self.stage_list)} sampling params, got {len(sampling_params_list)}")
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# Normalize prompts to a list for per-request iteration
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if not isinstance(prompts, (list, tuple)):
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request_prompts: list[PromptType] = [prompts]
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else:
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request_prompts = list(prompts)
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# Create async output queue monitors for each stage
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stage_monitors = []
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for stage_id, stage in enumerate(self.stage_list):
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monitor = asyncio.create_task(self._monitor_stage_outputs_async(stage_id, stage))
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stage_monitors.append(monitor)
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# Orchestrator keeps stage objects for input derivation
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num_stages = len(self.stage_list)
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# Generate globally unique request IDs and map them to original prompts
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request_ids: list[str] = [f"{i}_{uuid.uuid4()}" for i in range(len(request_prompts))]
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request_id_to_prompt: dict[str, PromptType] = {rid: p for rid, p in zip(request_ids, request_prompts)}
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# Track start time for each request for end-to-end timing
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_req_start_ts: dict[str, float] = {}
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_wall_start_ts: float = time.time()
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# Determine final stage for E2E stats (highest stage_id with final_output=True; fallback to last stage)
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final_stage_id_to_prompt: dict[str, int] = {}
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for rid, prompt in request_id_to_prompt.items():
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if isinstance(prompt, dict):
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prompt_modalities = prompt.get("modalities", None)
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else:
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prompt_modalities = None
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final_stage_id_for_e2e = get_final_stage_id_for_e2e(
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prompt_modalities, self.output_modalities, self.stage_list
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)
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final_stage_id_to_prompt[rid] = final_stage_id_for_e2e
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# Metrics/aggregation helper
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metrics = OrchestratorMetrics(
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num_stages,
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self._enable_stats,
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self._stats_file,
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self._overall_stats_file,
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_wall_start_ts,
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)
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# Seed all requests into stage-0 queue
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logger.debug("[AsyncOrchestrator] Seeding %d requests into stage-0", len(request_prompts))
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# Mark first input time for stage-0
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metrics.stage_first_ts[0] = metrics.stage_first_ts[0] or time.time()
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for req_id, prompt in request_id_to_prompt.items():
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sp0 = sampling_params_list[0] # type: ignore[index]
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task = {
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"request_id": req_id,
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"engine_inputs": prompt,
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"sampling_params": sp0,
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}
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logger.info(f"task: {task}")
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self.stage_list[0].submit(task)
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_req_start_ts[req_id] = time.time()
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logger.debug("[AsyncOrchestrator] Enqueued request %s to stage-0", req_id)
|
|
|
|
# For each stage, forward results in stage order; collect final results at the end
|
|
# We pipeline by continuously polling output queues
|
|
remaining_by_stage: list[int] = [len(request_prompts)] + [0] * (num_stages - 1)
|
|
completed_requests = 0
|
|
total_requests = len(request_prompts)
|
|
|
|
logger.debug(
|
|
"[AsyncOrchestrator] Entering scheduling loop: total_requests=%d, stages=%d",
|
|
total_requests,
|
|
num_stages,
|
|
)
|
|
|
|
while completed_requests < total_requests:
|
|
# Asynchronously wait for output from any stage
|
|
await asyncio.sleep(0.001) # Brief sleep to avoid CPU overload
|
|
|
|
for stage_id, stage in enumerate(self.stage_list):
|
|
result = stage.try_collect()
|
|
if result is None:
|
|
continue
|
|
|
|
req_id = result.get("request_id")
|
|
if "error" in result:
|
|
logger.error(
|
|
"Stage %s error on request %s: %s",
|
|
stage_id,
|
|
req_id,
|
|
result["error"],
|
|
)
|
|
continue
|
|
|
|
if result.get("type") == "stage_ready":
|
|
# If stage initialization is slower than expected, wait briefly and retry
|
|
await asyncio.sleep(0.05)
|
|
continue
|
|
|
|
engine_outputs = _load(result, obj_key="engine_outputs", shm_key="engine_outputs_shm")
|
|
# Mark last output time for this stage whenever we receive outputs
|
|
metrics.stage_last_ts[stage_id] = max(metrics.stage_last_ts[stage_id] or 0.0, time.time())
|
|
|
|
try:
|
|
_m = result.get("metrics")
|
|
if _m is not None:
|
|
metrics.on_stage_metrics(stage_id, req_id, _m)
|
|
except Exception as e:
|
|
logger.exception(
|
|
"[AsyncOrchestrator] Failed to process metrics for stage %s, req %s: %s",
|
|
stage_id,
|
|
req_id,
|
|
e,
|
|
)
|
|
|
|
logger.debug(
|
|
"[AsyncOrchestrator] Stage-%s completed request %s; forwarding or finalizing",
|
|
stage_id,
|
|
req_id,
|
|
)
|
|
stage.set_engine_outputs(engine_outputs)
|
|
|
|
if getattr(stage, "final_output", False):
|
|
# Handle diffusion outputs that already contain images
|
|
if stage.final_output_type == "image":
|
|
# Extract images from engine_outputs if it's an OmniRequestOutput
|
|
images = []
|
|
output_to_check = engine_outputs[0] if isinstance(engine_outputs, list) else engine_outputs
|
|
if isinstance(output_to_check, OmniRequestOutput) and output_to_check.images:
|
|
images = output_to_check.images
|
|
elif hasattr(output_to_check, "images") and output_to_check.images:
|
|
images = output_to_check.images
|
|
final_output = OmniRequestOutput(
|
|
stage_id=stage_id,
|
|
final_output_type=stage.final_output_type,
|
|
request_output=engine_outputs,
|
|
images=images,
|
|
)
|
|
else:
|
|
final_output = OmniRequestOutput(
|
|
stage_id=stage_id,
|
|
final_output_type=stage.final_output_type, # type: ignore[attr-defined]
|
|
request_output=engine_outputs,
|
|
)
|
|
yield final_output
|
|
logger.debug(
|
|
"[AsyncOrchestrator] Request %s finalized at stage-%s",
|
|
req_id,
|
|
stage_id,
|
|
)
|
|
|
|
# End-to-end timing and time-per-token for final output
|
|
# (only once per request at the designated final stage)
|
|
try:
|
|
rid_key = str(req_id)
|
|
if stage_id == final_stage_id_to_prompt[req_id] and rid_key not in metrics.e2e_done:
|
|
metrics.on_finalize_request(
|
|
stage_id,
|
|
req_id,
|
|
engine_outputs,
|
|
_req_start_ts.get(req_id, _wall_start_ts),
|
|
)
|
|
except Exception as e:
|
|
logger.exception(
|
|
"[AsyncOrchestrator] Finalize request handling error for req %s at stage %s: %s",
|
|
req_id,
|
|
stage_id,
|
|
e,
|
|
)
|
|
|
|
next_stage_id = stage_id + 1
|
|
if next_stage_id <= final_stage_id_to_prompt[req_id]:
|
|
next_stage: OmniStage = self.stage_list[next_stage_id]
|
|
try:
|
|
next_inputs = next_stage.process_engine_inputs(self.stage_list, [request_id_to_prompt[req_id]])
|
|
except Exception as e:
|
|
logger.exception(
|
|
"[AsyncOrchestrator] Process engine inputs error for req %s at stage %s: %s",
|
|
req_id,
|
|
next_stage_id,
|
|
e,
|
|
)
|
|
continue
|
|
sp_next = sampling_params_list[next_stage_id] # type: ignore[index]
|
|
|
|
# Check connector for this edge
|
|
connector_key = (str(stage_id), str(next_stage_id))
|
|
connector = self.connectors.get(connector_key)
|
|
sent_via_connector = False
|
|
if connector:
|
|
sent_via_connector = try_send_via_connector(
|
|
connector=connector,
|
|
stage_id=stage_id,
|
|
next_stage_id=next_stage_id,
|
|
req_id=req_id,
|
|
next_inputs=next_inputs,
|
|
sampling_params=sp_next,
|
|
original_prompt=request_id_to_prompt[req_id],
|
|
next_stage_queue_submit_fn=self.stage_list[next_stage_id].submit,
|
|
metrics=metrics,
|
|
)
|
|
|
|
if not sent_via_connector:
|
|
raise RuntimeError(
|
|
f"[AsyncOrchestrator] Failed to send request {req_id} "
|
|
f"to stage-{next_stage_id} via connector. Configure a connector "
|
|
"for this edge or inspect connector logs for details."
|
|
)
|
|
logger.debug(
|
|
"[AsyncOrchestrator] Forwarded request %s to stage-%s",
|
|
req_id,
|
|
next_stage_id,
|
|
)
|
|
remaining_by_stage[next_stage_id] += 1
|
|
else:
|
|
completed_requests += 1
|
|
logger.debug(
|
|
"[AsyncOrchestrator] Request %s fully completed (%d/%d)",
|
|
req_id,
|
|
completed_requests,
|
|
total_requests,
|
|
)
|
|
|
|
logger.debug("[AsyncOrchestrator] All requests completed")
|
|
|
|
# Summarize and print statistics
|
|
try:
|
|
summary = metrics.build_and_log_summary(final_stage_id_to_prompt)
|
|
logger.info("[Summary] %s", pformat(summary, sort_dicts=False))
|
|
except Exception as e:
|
|
logger.exception("[AsyncOrchestrator] Failed to build/log summary: %s", e)
|
|
|
|
async def _monitor_stage_outputs_async(self, stage_id: int, stage: OmniStage) -> None:
|
|
"""Asynchronously monitor stage output queue."""
|
|
while True:
|
|
result = stage.try_collect()
|
|
if result is not None:
|
|
# Put result into async queue for main loop processing
|
|
pass
|
|
await asyncio.sleep(0.001)
|
|
|
|
# Here is a duplicated init for the first stage to get the tokenizer,
|
|
# input_processor, and io_processor
|
|
# TODO: Refactor the code to avoid the duplicated init, we need to pass
|
|
# the tokenizer, input_processor, and io_processor back here from the
|
|
# first stage.
|
|
vllm_config = self.stage_list[0].vllm_config
|
|
self.tokenizer = init_tokenizer_from_config(model_config=vllm_config.model_config)
|
|
self.input_processor = OmniInputProcessor(
|
|
vllm_config=vllm_config,
|
|
tokenizer=self.tokenizer,
|
|
)
|
|
self.model_config = vllm_config.model_config
|
|
self.io_processor = get_io_processor(
|
|
vllm_config,
|
|
self.model_config.io_processor_plugin,
|
|
)
|
|
|
|
def _initialize_stages(
|
|
self,
|
|
model: str,
|
|
init_sleep_seconds: int,
|
|
shm_threshold_bytes: int,
|
|
init_timeout: int,
|
|
) -> None:
|
|
self.stage_list: list[OmniStage] = []
|
|
|
|
# Build OmniStage instances in parallel, preserve original order
|
|
def _build_stage(idx_cfg: tuple[int, Any]) -> tuple[int, OmniStage]:
|
|
idx, cfg = idx_cfg
|
|
return idx, OmniStage(cfg)
|
|
|
|
with ThreadPoolExecutor(max_workers=min(len(self.stage_configs), max(1, os.cpu_count() or 1))) as executor:
|
|
futures = [executor.submit(_build_stage, (idx, cfg)) for idx, cfg in enumerate(self.stage_configs)]
|
|
results: list[tuple[int, OmniStage]] = []
|
|
for fut in as_completed(futures):
|
|
results.append(fut.result())
|
|
results.sort(key=lambda x: x[0])
|
|
self.stage_list = [st for _, st in results]
|
|
self.default_sampling_params_list = [st.default_sampling_params for st in self.stage_list]
|
|
self.output_modalities = [st.final_output_type for st in self.stage_list]
|
|
logger.debug("[Orchestrator] Loaded %d stages", len(self.stage_list))
|
|
|
|
if self.worker_backend == "ray":
|
|
self._queue_cls = get_ray_queue_class()
|
|
else:
|
|
self._ctx = mp.get_context("spawn")
|
|
self._queue_cls = lambda: self._ctx.Queue(maxsize=0)
|
|
|
|
self._stage_in_queues: list[mp.Queue] = []
|
|
self._stage_out_queues: list[mp.Queue] = []
|
|
self._init_sleep_seconds = max(0, int(init_sleep_seconds))
|
|
self._shm_threshold_bytes = max(0, int(shm_threshold_bytes))
|
|
self._start_stages(model)
|
|
# Wait for all stages to report readiness before seeding
|
|
self._stages_ready: set[int] = set()
|
|
self._wait_for_stages_ready(timeout=init_timeout)
|
|
|
|
def _start_stages(self, model: str) -> None:
|
|
if self.worker_backend == "ray":
|
|
# Initialize Ray Cluster
|
|
self._ray_pg = create_placement_group(
|
|
number_of_stages=len(self.stage_list), address=self.ray_address, strategy="PACK"
|
|
)
|
|
|
|
for stage_id, stage in enumerate(self.stage_list):
|
|
# Use unbounded queues to avoid deadlock when seeding many requests
|
|
in_q = self._queue_cls()
|
|
out_q = self._queue_cls()
|
|
self._stage_in_queues.append(in_q)
|
|
self._stage_out_queues.append(out_q)
|
|
|
|
# Attach queues and start Stage-owned worker process
|
|
stage.attach_queues(in_q, out_q)
|
|
|
|
# Build connectors config for this stage
|
|
stage_connectors_config = get_stage_connector_config(
|
|
self.omni_transfer_config,
|
|
stage_id,
|
|
)
|
|
|
|
stage.init_stage_worker(
|
|
model,
|
|
is_async=True,
|
|
shm_threshold_bytes=self._shm_threshold_bytes,
|
|
ctx=self._ctx if self.worker_backend != "ray" else None,
|
|
batch_timeout=self.batch_timeout,
|
|
connectors_config=stage_connectors_config,
|
|
worker_backend=self.worker_backend,
|
|
ray_placement_group=self._ray_pg,
|
|
)
|
|
|
|
logger.debug("[Orchestrator] Stage-%s process started", stage_id)
|
|
time.sleep(self._init_sleep_seconds)
|
|
|
|
def close(self) -> None:
|
|
"""Close all stage processes and clean up resources.
|
|
|
|
Sends shutdown signals to all stage input queues and stops
|
|
all stage worker processes. This method should be called
|
|
when done using the AsyncOmni instance.
|
|
"""
|
|
for q in self._stage_in_queues:
|
|
try:
|
|
q.put_nowait(None)
|
|
except Exception as e:
|
|
logger.warning(
|
|
"[Orchestrator] Failed to send shutdown signal to \
|
|
stage input queue: %s",
|
|
e,
|
|
)
|
|
for stage in self.stage_list:
|
|
try:
|
|
stage.stop_stage_worker()
|
|
except Exception as e:
|
|
logger.warning("[Orchestrator] Failed to stop stage worker: %s", e)
|
|
|
|
if self.output_handler is not None:
|
|
self.output_handler.cancel()
|
|
self.output_handler = None
|
|
|
|
try_close_ray(self._ray_pg)
|
|
|
|
def __del__(self) -> None: # best-effort
|
|
try:
|
|
self.close()
|
|
except Exception as e:
|
|
logger.debug("[Orchestrator] __del__ close() raised: %s", e, exc_info=True)
|
|
|
|
def shutdown(self):
|
|
"""Shutdown, cleaning up the background proc and IPC.
|
|
|
|
Alias for close() method. Cleans up all stage processes
|
|
and inter-process communication resources.
|
|
"""
|
|
try:
|
|
self.close()
|
|
except Exception as e:
|
|
logger.debug("[Orchestrator] __del__ close() raised: %s", e, exc_info=True)
|
|
|
|
async def generate(
|
|
self,
|
|
prompt: PromptType,
|
|
request_id: str,
|
|
sampling_params_list: SamplingParams | Sequence[SamplingParams] | None = None,
|
|
output_modalities: list[str] | None = None,
|
|
lora_request: LoRARequest | None = None,
|
|
trace_headers: Mapping[str, str] | None = None,
|
|
priority: int = 0,
|
|
data_parallel_rank: int | None = None,
|
|
) -> AsyncGenerator[OmniRequestOutput, None]:
|
|
"""Generate outputs for the given prompt asynchronously.
|
|
|
|
Processes the prompt through all stages in the pipeline and yields
|
|
outputs as they become available. Each stage uses its corresponding
|
|
sampling parameters from the sampling_params_list.
|
|
|
|
Args:
|
|
prompt: Prompt to process. Can be a text string, token IDs,
|
|
or multimodal prompt.
|
|
request_id: Unique identifier for this request
|
|
sampling_params_list: List of SamplingParams, one for each stage.
|
|
Must have the same length as the number of stages.
|
|
If None, uses default sampling params for each stage.
|
|
lora_request: Optional LoRA adapter request for this generation
|
|
trace_headers: Optional tracing headers for observability
|
|
priority: Request priority (higher values processed first)
|
|
data_parallel_rank: Optional data parallel rank for distributed
|
|
inference
|
|
|
|
Yields:
|
|
OmniRequestOutput objects as they are produced by each stage.
|
|
Each output contains the stage_id, final_output_type, and
|
|
the request_output from that stage.
|
|
|
|
Raises:
|
|
ValueError: If sampling_params_list has incorrect length.
|
|
"""
|
|
# Wait until generation is resumed if the engine is paused.
|
|
async with self._pause_cond:
|
|
await self._pause_cond.wait_for(lambda: not self._paused)
|
|
|
|
logger.debug("[Orchestrator] generate() called")
|
|
|
|
# Start output handler on the first call to generate()
|
|
self._run_output_handler()
|
|
|
|
if sampling_params_list is None:
|
|
sampling_params_list = self.default_sampling_params_list
|
|
if len(sampling_params_list) != len(self.stage_list):
|
|
raise ValueError(
|
|
f"Expected {len(self.stage_list)} sampling params, \
|
|
got {len(sampling_params_list)}"
|
|
)
|
|
|
|
# Orchestrator keeps stage objects for input derivation
|
|
num_stages = len(self.stage_list)
|
|
# Track per-request start time for end-to-end timing
|
|
_req_start_ts: dict[int, float] = {}
|
|
_wall_start_ts: float = time.time()
|
|
# _last_finish_ts: float = _wall_start_ts
|
|
|
|
# Determine the final stage for E2E stats (highest stage_id with
|
|
# final_output=True; fallback to last stage)
|
|
final_stage_id_for_e2e = get_final_stage_id_for_e2e(output_modalities, self.output_modalities, self.stage_list)
|
|
|
|
# Metrics/aggregation helper
|
|
metrics = OrchestratorMetrics(
|
|
num_stages,
|
|
self._enable_stats,
|
|
_wall_start_ts,
|
|
)
|
|
# Seed stage-0 queue with all requests
|
|
logger.debug("[Orchestrator] Seeding request into stage-0")
|
|
req_state = ClientRequestState(request_id)
|
|
self.request_states[request_id] = req_state
|
|
|
|
# Mark first input time for stage-0
|
|
metrics.stage_first_ts[0] = metrics.stage_first_ts[0] or time.time()
|
|
|
|
sp0: SamplingParams = sampling_params_list[0] # type: ignore[index]
|
|
task = {
|
|
"request_id": request_id,
|
|
"engine_inputs": prompt,
|
|
"sampling_params": sp0,
|
|
}
|
|
self.stage_list[0].submit(task)
|
|
_req_start_ts[request_id] = time.time()
|
|
logger.debug("[Orchestrator] Enqueued request %s to stage-0", request_id)
|
|
|
|
logger.debug("[Orchestrator] Entering scheduling loop: stages=%d", num_stages)
|
|
for stage_id, stage in enumerate(self.stage_list[: final_stage_id_for_e2e + 1]):
|
|
result = await req_state.queue.get()
|
|
assert stage_id == req_state.stage_id
|
|
|
|
req_id = result.get("request_id")
|
|
if "error" in result:
|
|
logger.error(
|
|
"Stage %s error on request %s: %s",
|
|
stage_id,
|
|
req_id,
|
|
result["error"],
|
|
)
|
|
raise RuntimeError(result) # Request Finished due to error
|
|
|
|
engine_outputs = _load(result, obj_key="engine_outputs", shm_key="engine_outputs_shm")
|
|
# Mark last output time for this stage whenever we receive outputs
|
|
metrics.stage_last_ts[stage_id] = max(metrics.stage_last_ts[stage_id] or 0.0, time.time())
|
|
try:
|
|
_m = asdict(result.get("metrics"))
|
|
if _m is not None:
|
|
metrics.on_stage_metrics(stage_id, req_id, _m)
|
|
except Exception as e:
|
|
logger.exception(
|
|
"[Orchestrator] Failed to process metrics for stage %s, \
|
|
req %s: %s",
|
|
stage_id,
|
|
req_id,
|
|
e,
|
|
)
|
|
logger.debug(
|
|
"[Orchestrator] Stage-%s completed request %s; \
|
|
forwarding or finalizing",
|
|
stage_id,
|
|
req_id,
|
|
)
|
|
stage.set_engine_outputs(engine_outputs)
|
|
|
|
if getattr(stage, "final_output", False):
|
|
logger.debug(
|
|
"[Orchestrator] Request %s finalized at stage-%s",
|
|
req_id,
|
|
stage_id,
|
|
)
|
|
|
|
# End-to-end timing and time-per-token for final output
|
|
# (only once per request at the designated final stage)
|
|
try:
|
|
rid_key = str(req_id)
|
|
if stage_id == final_stage_id_for_e2e and rid_key not in metrics.e2e_done:
|
|
metrics.on_finalize_request(
|
|
stage_id,
|
|
req_id,
|
|
engine_outputs,
|
|
_req_start_ts.get(req_id, _wall_start_ts),
|
|
)
|
|
except Exception as e:
|
|
logger.exception(
|
|
"[Orchestrator] Finalize request handling error for \
|
|
req %s at stage %s: %s",
|
|
req_id,
|
|
stage_id,
|
|
e,
|
|
)
|
|
|
|
if isinstance(engine_outputs, list):
|
|
engine_outputs = engine_outputs[0]
|
|
# Handle diffusion outputs that already contain images
|
|
if stage.final_output_type == "image":
|
|
images = []
|
|
if isinstance(engine_outputs, OmniRequestOutput) and engine_outputs.images:
|
|
images = engine_outputs.images
|
|
elif hasattr(engine_outputs, "images") and engine_outputs.images:
|
|
images = engine_outputs.images
|
|
yield OmniRequestOutput(
|
|
stage_id=stage_id,
|
|
final_output_type=stage.final_output_type,
|
|
request_output=engine_outputs,
|
|
images=images,
|
|
)
|
|
else:
|
|
yield OmniRequestOutput(
|
|
stage_id=stage_id,
|
|
final_output_type=stage.final_output_type,
|
|
request_output=engine_outputs,
|
|
)
|
|
|
|
# Forward to next stage if there is one
|
|
next_stage_id = stage_id + 1
|
|
if next_stage_id <= final_stage_id_for_e2e:
|
|
next_stage: OmniStage = self.stage_list[next_stage_id]
|
|
next_inputs = next_stage.process_engine_inputs(self.stage_list, prompt)
|
|
sp_next: SamplingParams = sampling_params_list[next_stage_id]
|
|
|
|
# Check if we have a connector for this edge
|
|
connector_key = (str(stage_id), str(next_stage_id))
|
|
connector = self.connectors.get(connector_key)
|
|
|
|
sent_via_connector = False
|
|
if connector:
|
|
sent_via_connector = try_send_via_connector(
|
|
connector=connector,
|
|
stage_id=stage_id,
|
|
next_stage_id=next_stage_id,
|
|
req_id=req_id,
|
|
next_inputs=next_inputs,
|
|
sampling_params=sp_next,
|
|
original_prompt=prompt,
|
|
next_stage_queue_submit_fn=self.stage_list[next_stage_id].submit,
|
|
metrics=metrics,
|
|
)
|
|
|
|
if not sent_via_connector:
|
|
# Fallback logic removed as we now enforce connector usage.
|
|
# If no connector is found or send fails, we log an error and raise,
|
|
# because continuing would cause the request to be silently dropped
|
|
# and the orchestrator to hang waiting for completion.
|
|
error_msg = (
|
|
f"[Orchestrator] Failed to send request {req_id} to stage-{next_stage_id} via connector. "
|
|
"Configure a connector for this edge or inspect connector logs for details."
|
|
)
|
|
logger.error(error_msg)
|
|
raise RuntimeError(error_msg)
|
|
logger.debug(
|
|
"[Orchestrator] Forwarded request %s to stage-%s",
|
|
req_id,
|
|
next_stage_id,
|
|
)
|
|
else:
|
|
logger.debug("[Orchestrator] Request %s fully completed", req_id)
|
|
|
|
logger.debug("[Orchestrator] All requests completed")
|
|
|
|
# Summarize and print stats
|
|
try:
|
|
summary = metrics.build_and_log_summary(final_stage_id_for_e2e)
|
|
logger.info("[Summary] %s", pformat(summary, sort_dicts=False))
|
|
except Exception as e:
|
|
logger.exception("[Orchestrator] Failed to build/log summary: %s", e)
|
|
finally:
|
|
self.request_states.pop(request_id, None)
|
|
|
|
def _wait_for_stages_ready(self, timeout: int = 120) -> None:
|
|
num_stages = len(self.stage_list)
|
|
while len(self._stages_ready) < num_stages:
|
|
progressed = False
|
|
for stage_id, stage in enumerate(self.stage_list):
|
|
if stage_id in self._stages_ready:
|
|
continue
|
|
result = stage.try_collect()
|
|
if result is None:
|
|
continue
|
|
progressed = True
|
|
if result.get("type") == "stage_ready":
|
|
self._stages_ready.add(stage_id)
|
|
# Store vllm_config received from worker process
|
|
vllm_config = result.get("vllm_config")
|
|
if vllm_config is not None:
|
|
stage.set_vllm_config(vllm_config)
|
|
tokenizer = result.get("tokenizer")
|
|
if tokenizer is not None:
|
|
stage.set_tokenizer(tokenizer)
|
|
# input_preprocessor = result.get("input_preprocessor")
|
|
# if input_preprocessor is not None:
|
|
# stage.set_input_preprocessor(input_preprocessor)
|
|
is_tracing_enabled = result.get("is_tracing_enabled")
|
|
if is_tracing_enabled is not None:
|
|
stage.set_is_tracing_enabled(is_tracing_enabled)
|
|
logger.debug("[Orchestrator] Stage-%s reported ready", stage_id)
|
|
else:
|
|
# No user data should arrive before seeding; ignore other messages
|
|
pass
|
|
if not progressed:
|
|
time.sleep(0.01)
|
|
if len(self._stages_ready) < num_stages:
|
|
not_ready = sorted(set(range(num_stages)) - set(self._stages_ready))
|
|
logger.warning(
|
|
"[Orchestrator] Initialization timeout: only %s/%s stages are \
|
|
ready; not ready: %s",
|
|
len(self._stages_ready),
|
|
num_stages,
|
|
not_ready,
|
|
)
|
|
# Provide actionable suggestions before shutdown
|
|
try:
|
|
suggestions = [
|
|
"Verify GPU/device assignment in config (runtime.devices) is \
|
|
correct.",
|
|
"Check GPU/host memory availability; reduce model or batch size if needed.", # noqa: E501
|
|
"Check model weights path and network reachability (if loading remotely).", # noqa: E501
|
|
"Increase initialization wait time (init_sleep_seconds or \
|
|
call-site timeout).",
|
|
]
|
|
logger.error(
|
|
"[Orchestrator] Stage initialization failed, shutting down. \
|
|
Suggestions:\n- %s",
|
|
"\n- ".join(suggestions),
|
|
)
|
|
except Exception:
|
|
# Best-effort logging of suggestions
|
|
logger.error(
|
|
"[Orchestrator] Stage initialization failed and an error \
|
|
occurred while logging suggestions",
|
|
)
|
|
|
|
def _run_output_handler(self) -> None:
|
|
if self.output_handler is not None:
|
|
return
|
|
|
|
stage_list = self.stage_list
|
|
request_states = self.request_states
|
|
|
|
async def output_handler():
|
|
try:
|
|
while True:
|
|
idle = True
|
|
for stage_id, stage in enumerate(stage_list):
|
|
result = stage.try_collect()
|
|
if result is None:
|
|
continue
|
|
idle = False
|
|
if result.get("type") == "stage_ready":
|
|
# Only happens when stage is initialized slower than expected,
|
|
# so we wait for a short time and try again
|
|
await asyncio.sleep(0.05)
|
|
continue
|
|
req_id = result.get("request_id")
|
|
req_state = request_states.get(req_id)
|
|
if req_state is None:
|
|
logger.debug(
|
|
"[Orchestrator] Request may have been aborted; \
|
|
dropping output for req %s at stage-%s ",
|
|
req_id,
|
|
stage_id,
|
|
)
|
|
continue
|
|
await req_state.queue.put(result)
|
|
req_state.stage_id = stage_id
|
|
if idle:
|
|
await asyncio.sleep(0.001) # Avoid CPU overload when idle
|
|
else:
|
|
await asyncio.sleep(0)
|
|
except Exception as e:
|
|
logger.exception("AsyncOmni output_handler failed.")
|
|
for req_state in request_states.values():
|
|
await req_state.queue.put({"request_id": req_id, "error": str(e)})
|
|
self.output_handler = None # Make possible for restart
|
|
|
|
self.output_handler = asyncio.create_task(output_handler())
|
|
|
|
@property
|
|
def is_running(self) -> bool:
|
|
# Is None before the loop is started.
|
|
return len(self._stage_in_queues) > 0
|
|
|
|
@property
|
|
def is_stopped(self) -> bool:
|
|
return self.errored
|
|
|
|
@property
|
|
def errored(self) -> bool:
|
|
return not self.is_running
|
|
|
|
@property
|
|
def dead_error(self) -> BaseException:
|
|
return EngineDeadError()
|
|
|
|
async def abort(self, request_id: str | Iterable[str]) -> None:
|
|
pass
|
|
|
|
async def get_vllm_config(self) -> VllmConfig:
|
|
for stage in self.stage_list:
|
|
if stage.is_comprehension:
|
|
# Use the vllm_config received from worker process
|
|
if stage.vllm_config is not None:
|
|
return stage.vllm_config
|
|
return None
|
|
|
|
async def get_model_config(self) -> OmniModelConfig:
|
|
for stage in self.stage_list:
|
|
if stage.is_comprehension:
|
|
# Use the vllm_config received from worker process
|
|
if stage.vllm_config is not None:
|
|
return stage.vllm_config.model_config
|
|
return None
|
|
|
|
async def get_input_preprocessor(self) -> InputPreprocessor:
|
|
return None
|
|
|
|
async def get_tokenizer(self) -> TokenizerLike:
|
|
for stage in self.stage_list:
|
|
if stage.is_comprehension:
|
|
return stage.tokenizer
|
|
return None
|
|
|
|
async def is_tracing_enabled(self) -> bool:
|
|
for stage in self.stage_list:
|
|
if stage.is_comprehension:
|
|
return stage.is_tracing_enabled
|
|
return False
|
|
|
|
async def do_log_stats(self) -> None:
|
|
pass
|
|
|
|
async def check_health(self) -> None:
|
|
pass
|
|
|
|
async def reset_mm_cache(self) -> None:
|
|
pass
|
|
|
|
async def reset_prefix_cache(self, reset_running_requests: bool = False) -> bool:
|
|
pass
|
|
|
|
async def sleep(self, level: int = 1) -> None:
|
|
pass
|
|
|
|
async def wake_up(self, tags: list[str] | None = None) -> None:
|
|
pass
|
|
|
|
async def is_sleeping(self) -> bool:
|
|
"""Check whether the engine is sleeping"""
|
|
return False
|
|
|
|
async def add_lora(self, lora_request: LoRARequest) -> bool:
|
|
"""Load a new LoRA adapter into the engine for future requests."""
|
|
return False
|
|
|
|
async def encode(
|
|
self,
|
|
*args,
|
|
**kwargs,
|
|
):
|
|
"""Generate outputs for a request from a pooling model."""
|
|
raise NotImplementedError("encode() is not implemented for AsyncOmni")
|
|
|
|
async def start_profile(self) -> None:
|
|
raise NotImplementedError("start_profile() is not implemented for AsyncOmni")
|
|
|
|
async def stop_profile(self) -> None:
|
|
raise NotImplementedError("stop_profile() is not implemented for AsyncOmni")
|
|
|
|
async def pause_generation(
|
|
self,
|
|
*,
|
|
wait_for_inflight_requests: bool = False,
|
|
clear_cache: bool = True,
|
|
) -> None:
|
|
"""
|
|
Pause generation to allow model weight updates.
|
|
|
|
New generation/encoding requests are blocked until resume.
|
|
|
|
Args:
|
|
wait_for_inflight_requests: When ``True`` waits for in-flight
|
|
requests to finish before pausing. When ``False`` (default),
|
|
immediately aborts any in-flight requests.
|
|
clear_cache: Whether to clear KV cache and prefix cache after
|
|
draining. Set to ``False`` to preserve cache for faster resume.
|
|
Default is ``True`` (clear caches).
|
|
"""
|
|
|
|
async with self._pause_cond:
|
|
if self._paused:
|
|
return
|
|
self._paused = True
|
|
|
|
# Note: AsyncOmni uses a stage-based architecture without a central
|
|
# output_processor. For now, we simply set the pause flag and let
|
|
# new requests wait. In-flight requests will complete naturally.
|
|
# TODO: Implement request abortion for stages if needed.
|
|
|
|
# Clear cache if requested
|
|
if clear_cache:
|
|
await self.reset_prefix_cache()
|
|
await self.reset_mm_cache()
|
|
|
|
async def resume_generation(self) -> None:
|
|
"""Resume generation after :meth:`pause_generation`."""
|
|
|
|
async with self._pause_cond:
|
|
self._paused = False
|
|
self._pause_cond.notify_all() # Wake up all waiting requests
|
|
|
|
async def is_paused(self) -> bool:
|
|
"""Return whether the engine is currently paused."""
|
|
|
|
async with self._pause_cond:
|
|
return self._paused
|