[V0 Deprecation] Remove vllm.worker and update according imports (#25901)

tests/model_executor/model_loader/tensorizer_loader/conftest.py

@@ -10,7 +10,7 @@ from vllm.model_executor.model_loader import tensorizer as tensorizer_mod
 from vllm.model_executor.model_loader.tensorizer import TensorizerConfig
 from vllm.utils import get_distributed_init_method, get_ip, get_open_port
 from vllm.v1.executor.abstract import UniProcExecutor
-from vllm.worker.worker_base import WorkerWrapperBase
+from vllm.v1.worker.worker_base import WorkerWrapperBase
 
 MODEL_REF = "facebook/opt-125m"
 

tools/pre_commit/check_pickle_imports.py

@@ -36,7 +36,6 @@ ALLOWED_FILES = {
     'benchmarks/cutlass_benchmarks/w8a8_benchmarks.py',
     'benchmarks/cutlass_benchmarks/sparse_benchmarks.py',
     # cloudpickle
-    'vllm/worker/worker_base.py',
     'vllm/executor/mp_distributed_executor.py',
     'vllm/executor/ray_distributed_executor.py',
     'vllm/entrypoints/llm.py',

vllm/executor/executor_base.py

@@ -19,7 +19,7 @@ from vllm.sequence import ExecuteModelRequest
 from vllm.tasks import SupportedTask
 from vllm.utils import make_async
 from vllm.v1.outputs import PoolerOutput, SamplerOutput
-from vllm.worker.worker_base import WorkerBase
+from vllm.v1.worker.worker_base import WorkerBase
 
 logger = init_logger(__name__)
 

vllm/executor/ray_utils.py

@@ -16,7 +16,7 @@ from vllm.logger import init_logger
 from vllm.platforms import current_platform
 from vllm.sequence import ExecuteModelRequest, IntermediateTensors
 from vllm.utils import get_ip
-from vllm.worker.worker_base import WorkerWrapperBase
+from vllm.v1.worker.worker_base import WorkerWrapperBase
 
 if TYPE_CHECKING:
     from vllm.v1.core.sched.output import SchedulerOutput

vllm/executor/uniproc_executor.py

@@ -19,7 +19,7 @@ from vllm.utils import (get_distributed_init_method, get_ip, get_open_port,
 from vllm.v1.engine import ReconfigureDistributedRequest, ReconfigureRankType
 from vllm.v1.executor.utils import get_and_update_mm_cache
 from vllm.v1.outputs import AsyncModelRunnerOutput
-from vllm.worker.worker_base import WorkerWrapperBase
+from vllm.v1.worker.worker_base import WorkerWrapperBase
 
 logger = init_logger(__name__)
 

vllm/platforms/cuda.py

@@ -110,17 +110,7 @@ class CudaPlatformBase(Platform):
         model_config = vllm_config.model_config
 
         if parallel_config.worker_cls == "auto":
-            if vllm_config.speculative_config:
+            parallel_config.worker_cls = "vllm.v1.worker.gpu_worker.Worker"
-                if not envs.VLLM_USE_V1:
-                    raise NotImplementedError(
-                        "Speculative decoding is not supported on vLLM V0.")
-                parallel_config.worker_cls = "vllm.v1.worker.gpu_worker.Worker"
-            else:
-                if envs.VLLM_USE_V1:
-                    parallel_config.worker_cls = \
-                        "vllm.v1.worker.gpu_worker.Worker"
-                else:
-                    parallel_config.worker_cls = "vllm.worker.worker.Worker"
 
         cache_config = vllm_config.cache_config
         if cache_config and cache_config.block_size is None:

vllm/platforms/rocm.py

@@ -327,17 +327,7 @@ class RocmPlatform(Platform):
             cache_config.block_size = 16
 
         if parallel_config.worker_cls == "auto":
-            if vllm_config.speculative_config:
+            parallel_config.worker_cls = "vllm.v1.worker.gpu_worker.Worker"
-                if not use_v1:
-                    raise NotImplementedError(
-                        "Speculative decoding is not supported on vLLM V0.")
-                parallel_config.worker_cls = "vllm.v1.worker.gpu_worker.Worker"
-            else:
-                if use_v1:
-                    parallel_config.worker_cls = \
-                        "vllm.v1.worker.gpu_worker.Worker"
-                else:
-                    parallel_config.worker_cls = "vllm.worker.worker.Worker"
         #  Aiter rms norm perform best when CUDA Graph capture is enabled.
         if (use_v1 and use_aiter_rms_norm and not is_eager_execution
                 and "-rms_norm" not in compilation_config.custom_ops):

vllm/v1/executor/multiproc_executor.py

@@ -41,7 +41,7 @@ from vllm.v1.executor.abstract import Executor, FailureCallback
 from vllm.v1.executor.utils import get_and_update_mm_cache
 from vllm.v1.outputs import (AsyncModelRunnerOutput, DraftTokenIds,
                              ModelRunnerOutput)
-from vllm.worker.worker_base import WorkerWrapperBase
+from vllm.v1.worker.worker_base import WorkerWrapperBase
 
 logger = init_logger(__name__)
 

vllm/v1/worker/worker_base.py

@@ -1,23 +1,35 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
 
-from typing import Optional
+from __future__ import annotations
+
+import os
+from typing import Any, Callable, Optional, TypeVar, Union
 
 import torch
 import torch.nn as nn
 
-from vllm.config import VllmConfig
+from vllm.config import VllmConfig, set_current_vllm_config
 from vllm.logger import init_logger
+from vllm.lora.request import LoRARequest
+from vllm.sequence import ExecuteModelRequest
+from vllm.utils import (enable_trace_function_call_for_thread,
+                        resolve_obj_by_qualname, run_method,
+                        update_environment_variables,
+                        warn_for_unimplemented_methods)
 from vllm.v1.kv_cache_interface import KVCacheSpec
-from vllm.worker.worker_base import WorkerBase as WorkerBaseV0
+from vllm.v1.outputs import SamplerOutput
 
 logger = init_logger(__name__)
 
+_R = TypeVar("_R")
 
-class WorkerBase(WorkerBaseV0):
+
-    """
+@warn_for_unimplemented_methods
-    Abstract class for v1 worker, mainly define some methods for v1.
+class WorkerBase:
-    For methods shared by v0 and v1, define them in v0 WorkerBase
+    """Worker interface that allows vLLM to cleanly separate implementations for
+    different hardware. Also abstracts control plane communication, e.g., to
+    communicate request metadata to other workers.
     """
 
     def __init__(
@@ -27,7 +39,7 @@ class WorkerBase(WorkerBaseV0):
         rank: int,
         distributed_init_method: str,
         is_driver_worker: bool = False,
-    ):
+    ) -> None:
         """
         Initialize common worker components.
 
@@ -39,8 +51,21 @@ class WorkerBase(WorkerBaseV0):
             is_driver_worker: Whether this worker handles driver
                 responsibilities
         """
-        # Configuration storage
+        self.vllm_config = vllm_config
-        super().__init__(vllm_config=vllm_config)
+        self.model_config = vllm_config.model_config
+        self.cache_config = vllm_config.cache_config
+        self.lora_config = vllm_config.lora_config
+        self.load_config = vllm_config.load_config
+        self.parallel_config = vllm_config.parallel_config
+        self.scheduler_config = vllm_config.scheduler_config
+        self.device_config = vllm_config.device_config
+        self.speculative_config = vllm_config.speculative_config
+        self.observability_config = vllm_config.observability_config
+        self.kv_transfer_config = vllm_config.kv_transfer_config
+        self.compilation_config = vllm_config.compilation_config
+
+        from vllm.platforms import current_platform
+        self.current_platform = current_platform
 
         self.parallel_config.rank = rank
         self.local_rank = local_rank
@@ -63,3 +88,227 @@ class WorkerBase(WorkerBaseV0):
     def check_health(self) -> None:
         """Basic health check (override for device-specific checks)."""
         return
+
+    def init_device(self) -> None:
+        """Initialize device state, such as loading the model or other on-device
+        memory allocations.
+        """
+        raise NotImplementedError
+
+    def initialize_cache(self, num_gpu_blocks: int,
+                         num_cpu_blocks: int) -> None:
+        """Initialize the KV cache with the given size in blocks.
+        """
+        raise NotImplementedError
+
+    def get_model(self) -> nn.Module:
+        raise NotImplementedError
+
+    def apply_model(self, fn: Callable[[nn.Module], _R]) -> _R:
+        """Apply a function on the model inside this worker."""
+        return fn(self.get_model())
+
+    def load_model(self) -> None:
+        """Load model onto target device."""
+        raise NotImplementedError
+
+    def execute_model(
+        self,
+        execute_model_req: Optional[ExecuteModelRequest] = None
+    ) -> Optional[list[SamplerOutput]]:
+        raise NotImplementedError
+
+    def start_worker_execution_loop(self) -> None:
+        """Execute model loop in parallel worker.
+
+        You can stop the loop by executing a driver worker with an empty output.
+        See `stop_remote_worker_execution_loop` for more details.
+        """
+        with self.current_platform.inference_mode():
+            while True:
+                output = self.execute_model(execute_model_req=None)
+                if output is None:
+                    return None
+
+    def determine_num_available_blocks(self) -> tuple[int, int]:
+        """Determine the number of available blocks for the GPU KV cache and
+        swappable CPU KV cache.
+
+        The implementation may run profiling or other heuristics to determine
+        the size of caches.
+
+        Returns a tuple[num_gpu_blocks, num_cpu_blocks], where num_gpu_blocks
+        are blocks that are "active" on the device and can be appended to.
+        num_cpu_blocks refers to "swapped" blocks in CPU memory and cannot be
+        appended to.
+        """
+        raise NotImplementedError
+
+    def get_cache_block_size_bytes(self) -> int:
+        """Return the size of a single cache block, in bytes. Used in
+        speculative decoding.
+        """
+        raise NotImplementedError
+
+    def add_lora(self, lora_request: LoRARequest) -> bool:
+        raise NotImplementedError
+
+    def remove_lora(self, lora_id: int) -> bool:
+        raise NotImplementedError
+
+    def pin_lora(self, lora_id: int) -> bool:
+        raise NotImplementedError
+
+    def list_loras(self) -> set[int]:
+        raise NotImplementedError
+
+    @property
+    def vocab_size(self) -> int:
+        """Get vocabulary size from model configuration."""
+        return self.model_config.get_vocab_size()
+
+    def shutdown(self) -> None:
+        """Clean up resources held by the worker."""
+        return
+
+
+class WorkerWrapperBase:
+    """
+    This class represents one process in an executor/engine. It is responsible
+    for lazily initializing the worker and handling the worker's lifecycle.
+    We first instantiate the WorkerWrapper, which remembers the worker module
+    and class name. Then, when we call `update_environment_variables`, and the
+    real initialization happens in `init_worker`.
+    """
+
+    def __init__(
+        self,
+        vllm_config: VllmConfig,
+        rpc_rank: int = 0,
+    ) -> None:
+        """
+        Initialize the worker wrapper with the given vllm_config and rpc_rank.
+        Note: rpc_rank is the rank of the worker in the executor. In most cases,
+        it is also the rank of the worker in the distributed group. However,
+        when multiple executors work together, they can be different.
+        e.g. in the case of SPMD-style offline inference with TP=2,
+        users can launch 2 engines/executors, each with only 1 worker.
+        All workers have rpc_rank=0, but they have different ranks in the TP
+        group.
+        """
+        self.rpc_rank = rpc_rank
+        self.worker: Optional[WorkerBase] = None
+        self.vllm_config: Optional[VllmConfig] = None
+        # do not store this `vllm_config`, `init_worker` will set the final
+        # one. TODO: investigate if we can remove this field in
+        # `WorkerWrapperBase`, `init_cached_hf_modules` should be
+        # unnecessary now.
+        if vllm_config.model_config is not None:
+            # it can be None in tests
+            trust_remote_code = vllm_config.model_config.trust_remote_code
+            if trust_remote_code:
+                # note: lazy import to avoid importing torch before initializing
+                from vllm.utils import init_cached_hf_modules
+                init_cached_hf_modules()
+
+    def shutdown(self) -> None:
+        if self.worker is not None:
+            self.worker.shutdown()
+
+    def adjust_rank(self, rank_mapping: dict[int, int]) -> None:
+        """
+        Adjust the rpc_rank based on the given mapping.
+        It is only used during the initialization of the executor,
+        to adjust the rpc_rank of workers after we create all workers.
+        """
+        if self.rpc_rank in rank_mapping:
+            self.rpc_rank = rank_mapping[self.rpc_rank]
+
+    def update_environment_variables(
+        self,
+        envs_list: list[dict[str, str]],
+    ) -> None:
+        envs = envs_list[self.rpc_rank]
+        key = 'CUDA_VISIBLE_DEVICES'
+        if key in envs and key in os.environ:
+            # overwriting CUDA_VISIBLE_DEVICES is desired behavior
+            # suppress the warning in `update_environment_variables`
+            del os.environ[key]
+        update_environment_variables(envs)
+
+    def init_worker(self, all_kwargs: list[dict[str, Any]]) -> None:
+        """
+        Here we inject some common logic before initializing the worker.
+        Arguments are passed to the worker class constructor.
+        """
+        kwargs = all_kwargs[self.rpc_rank]
+        self.vllm_config = kwargs.get("vllm_config")
+        assert self.vllm_config is not None, (
+            "vllm_config is required to initialize the worker")
+        enable_trace_function_call_for_thread(self.vllm_config)
+
+        from vllm.plugins import load_general_plugins
+        load_general_plugins()
+
+        if isinstance(self.vllm_config.parallel_config.worker_cls, str):
+            worker_class = resolve_obj_by_qualname(
+                self.vllm_config.parallel_config.worker_cls)
+        else:
+            raise ValueError(
+                "passing worker_cls is no longer supported. Please pass keep the class in a separate module and pass the qualified name of the class as a string."  # noqa: E501
+            )
+        if self.vllm_config.parallel_config.worker_extension_cls:
+            worker_extension_cls = resolve_obj_by_qualname(
+                self.vllm_config.parallel_config.worker_extension_cls)
+            extended_calls = []
+            if worker_extension_cls not in worker_class.__bases__:
+                # check any conflicts between worker and worker_extension_cls
+                for attr in dir(worker_extension_cls):
+                    if attr.startswith("__"):
+                        continue
+                    assert not hasattr(worker_class, attr), (
+                        f"Worker class {worker_class} already has an attribute"
+                        f" {attr}, which conflicts with the worker"
+                        f" extension class {worker_extension_cls}.")
+                    if callable(getattr(worker_extension_cls, attr)):
+                        extended_calls.append(attr)
+                # dynamically inherit the worker extension class
+                worker_class.__bases__ = worker_class.__bases__ + (
+                    worker_extension_cls, )
+                logger.info(
+                    "Injected %s into %s for extended collective_rpc calls %s",
+                    worker_extension_cls, worker_class, extended_calls)
+        with set_current_vllm_config(self.vllm_config):
+            # To make vLLM config available during worker initialization
+            self.worker = worker_class(**kwargs)
+            assert self.worker is not None
+
+    def initialize_from_config(self, kv_cache_configs: list[Any]) -> None:
+        kv_cache_config = kv_cache_configs[self.rpc_rank]
+        with set_current_vllm_config(self.vllm_config):
+            self.worker.initialize_from_config(kv_cache_config)  # type: ignore
+
+    def init_device(self):
+        with set_current_vllm_config(self.vllm_config):
+            # To make vLLM config available during device initialization
+            self.worker.init_device()  # type: ignore
+
+    def execute_method(self, method: Union[str, bytes], *args, **kwargs):
+        try:
+            # method resolution order:
+            # if a method is defined in this class, it will be called directly.
+            # otherwise, since we define `__getattr__` and redirect attribute
+            # query to `self.worker`, the method will be called on the worker.
+            return run_method(self, method, args, kwargs)
+        except Exception as e:
+            # if the driver worker also execute methods,
+            # exceptions in the rest worker may cause deadlock in rpc like ray
+            # see https://github.com/vllm-project/vllm/issues/3455
+            # print the error and inform the user to solve the error
+            msg = (f"Error executing method {method!r}. "
+                   "This might cause deadlock in distributed execution.")
+            logger.exception(msg)
+            raise e
+
+    def __getattr__(self, attr):
+        return getattr(self.worker, attr)

vllm/worker/worker_base.py

@@ -1,279 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
-
-import os
-from typing import (Any, Callable, Dict, List, Optional, Set, Tuple, TypeVar,
-                    Union)
-
-import cloudpickle
-import torch.nn as nn
-
-from vllm.config import VllmConfig, set_current_vllm_config
-from vllm.logger import init_logger
-from vllm.lora.request import LoRARequest
-from vllm.sequence import ExecuteModelRequest
-from vllm.utils import (enable_trace_function_call_for_thread,
-                        resolve_obj_by_qualname, run_method,
-                        update_environment_variables,
-                        warn_for_unimplemented_methods)
-from vllm.v1.outputs import SamplerOutput
-
-logger = init_logger(__name__)
-
-_R = TypeVar("_R")
-
-
-@warn_for_unimplemented_methods
-class WorkerBase:
-    """Worker interface that allows vLLM to cleanly separate implementations for
-    different hardware. Also abstracts control plane communication, e.g., to
-    communicate request metadata to other workers.
-    """
-
-    def __init__(
-        self,
-        vllm_config: VllmConfig,
-    ) -> None:
-        self.vllm_config = vllm_config
-        self.model_config = vllm_config.model_config
-        self.cache_config = vllm_config.cache_config
-        self.lora_config = vllm_config.lora_config
-        self.load_config = vllm_config.load_config
-        self.parallel_config = vllm_config.parallel_config
-        self.scheduler_config = vllm_config.scheduler_config
-        self.device_config = vllm_config.device_config
-        self.speculative_config = vllm_config.speculative_config
-        self.observability_config = vllm_config.observability_config
-        self.kv_transfer_config = vllm_config.kv_transfer_config
-        self.compilation_config = vllm_config.compilation_config
-        from vllm.platforms import current_platform
-        self.current_platform = current_platform
-
-    def init_device(self) -> None:
-        """Initialize device state, such as loading the model or other on-device
-        memory allocations.
-        """
-        raise NotImplementedError
-
-    def initialize_cache(self, num_gpu_blocks: int,
-                         num_cpu_blocks: int) -> None:
-        """Initialize the KV cache with the given size in blocks.
-        """
-        raise NotImplementedError
-
-    def get_model(self) -> nn.Module:
-        raise NotImplementedError
-
-    def apply_model(self, fn: Callable[[nn.Module], _R]) -> _R:
-        """Apply a function on the model inside this worker."""
-        return fn(self.get_model())
-
-    def load_model(self) -> None:
-        """Load model onto target device."""
-        raise NotImplementedError
-
-    def execute_model(
-        self,
-        execute_model_req: Optional[ExecuteModelRequest] = None
-    ) -> Optional[List[SamplerOutput]]:
-        raise NotImplementedError
-
-    def start_worker_execution_loop(self) -> None:
-        """Execute model loop in parallel worker.
-
-        You can stop the loop by executing a driver worker with an empty output.
-        See `stop_remote_worker_execution_loop` for more details.
-        """
-        with self.current_platform.inference_mode():
-            while True:
-                output = self.execute_model(execute_model_req=None)
-                if output is None:
-                    return None
-
-    def determine_num_available_blocks(self) -> Tuple[int, int]:
-        """Determine the number of available blocks for the GPU KV cache and
-        swappable CPU KV cache.
-
-        The implementation may run profiling or other heuristics to determine
-        the size of caches.
-
-        Returns a Tuple[num_gpu_blocks, num_cpu_blocks], where num_gpu_blocks
-        are blocks that are "active" on the device and can be appended to.
-        num_cpu_blocks refers to "swapped" blocks in CPU memory and cannot be
-        appended to.
-        """
-        raise NotImplementedError
-
-    def get_cache_block_size_bytes(self) -> int:
-        """Return the size of a single cache block, in bytes. Used in
-        speculative decoding.
-        """
-        raise NotImplementedError
-
-    def add_lora(self, lora_request: LoRARequest) -> bool:
-        raise NotImplementedError
-
-    def remove_lora(self, lora_id: int) -> bool:
-        raise NotImplementedError
-
-    def pin_lora(self, lora_id: int) -> bool:
-        raise NotImplementedError
-
-    def list_loras(self) -> Set[int]:
-        raise NotImplementedError
-
-    @property
-    def vocab_size(self) -> int:
-        """Get vocabulary size from model configuration."""
-        return self.model_config.get_vocab_size()
-
-    def shutdown(self) -> None:
-        """Clean up resources held by the worker."""
-        return
-
-
-class WorkerWrapperBase:
-    """
-    This class represents one process in an executor/engine. It is responsible
-    for lazily initializing the worker and handling the worker's lifecycle.
-    We first instantiate the WorkerWrapper, which remembers the worker module
-    and class name. Then, when we call `update_environment_variables`, and the
-    real initialization happens in `init_worker`.
-    """
-
-    def __init__(
-        self,
-        vllm_config: VllmConfig,
-        rpc_rank: int = 0,
-    ) -> None:
-        """
-        Initialize the worker wrapper with the given vllm_config and rpc_rank.
-        Note: rpc_rank is the rank of the worker in the executor. In most cases,
-        it is also the rank of the worker in the distributed group. However,
-        when multiple executors work together, they can be different.
-        e.g. in the case of SPMD-style offline inference with TP=2,
-        users can launch 2 engines/executors, each with only 1 worker.
-        All workers have rpc_rank=0, but they have different ranks in the TP
-        group.
-        """
-        self.rpc_rank = rpc_rank
-        self.worker: Optional[WorkerBase] = None
-        self.vllm_config: Optional[VllmConfig] = None
-        # do not store this `vllm_config`, `init_worker` will set the final
-        # one. TODO: investigate if we can remove this field in
-        # `WorkerWrapperBase`, `init_cached_hf_modules` should be
-        # unnecessary now.
-        if vllm_config.model_config is not None:
-            # it can be None in tests
-            trust_remote_code = vllm_config.model_config.trust_remote_code
-            if trust_remote_code:
-                # note: lazy import to avoid importing torch before initializing
-                from vllm.utils import init_cached_hf_modules
-                init_cached_hf_modules()
-
-    def shutdown(self) -> None:
-        if self.worker is not None:
-            self.worker.shutdown()
-
-    def adjust_rank(self, rank_mapping: Dict[int, int]) -> None:
-        """
-        Adjust the rpc_rank based on the given mapping.
-        It is only used during the initialization of the executor,
-        to adjust the rpc_rank of workers after we create all workers.
-        """
-        if self.rpc_rank in rank_mapping:
-            self.rpc_rank = rank_mapping[self.rpc_rank]
-
-    def update_environment_variables(self, envs_list: List[Dict[str,
-                                                                str]]) -> None:
-        envs = envs_list[self.rpc_rank]
-        key = 'CUDA_VISIBLE_DEVICES'
-        if key in envs and key in os.environ:
-            # overwriting CUDA_VISIBLE_DEVICES is desired behavior
-            # suppress the warning in `update_environment_variables`
-            del os.environ[key]
-        update_environment_variables(envs)
-
-    def init_worker(self, all_kwargs: List[Dict[str, Any]]) -> None:
-        """
-        Here we inject some common logic before initializing the worker.
-        Arguments are passed to the worker class constructor.
-        """
-        kwargs = all_kwargs[self.rpc_rank]
-        self.vllm_config = kwargs.get("vllm_config")
-        assert self.vllm_config is not None, (
-            "vllm_config is required to initialize the worker")
-        enable_trace_function_call_for_thread(self.vllm_config)
-
-        from vllm.plugins import load_general_plugins
-        load_general_plugins()
-
-        if isinstance(self.vllm_config.parallel_config.worker_cls, str):
-            worker_class = resolve_obj_by_qualname(
-                self.vllm_config.parallel_config.worker_cls)
-        else:
-            logger.warning(
-                "passing worker_cls as a class object is strongly deprecated,"
-                " as the serialization of class objects can be tricky and"
-                " error-prone. To be safe, please keep the class in a separate"
-                " module and pass the qualified name of the class as a string."
-            )
-            assert isinstance(self.vllm_config.parallel_config.worker_cls,
-                              bytes)
-            worker_class = cloudpickle.loads(
-                self.vllm_config.parallel_config.worker_cls)
-        if self.vllm_config.parallel_config.worker_extension_cls:
-            worker_extension_cls = resolve_obj_by_qualname(
-                self.vllm_config.parallel_config.worker_extension_cls)
-            extended_calls = []
-            if worker_extension_cls not in worker_class.__bases__:
-                # check any conflicts between worker and worker_extension_cls
-                for attr in dir(worker_extension_cls):
-                    if attr.startswith("__"):
-                        continue
-                    assert not hasattr(worker_class, attr), (
-                        f"Worker class {worker_class} already has an attribute"
-                        f" {attr}, which conflicts with the worker"
-                        f" extension class {worker_extension_cls}.")
-                    if callable(getattr(worker_extension_cls, attr)):
-                        extended_calls.append(attr)
-                # dynamically inherit the worker extension class
-                worker_class.__bases__ = worker_class.__bases__ + (
-                    worker_extension_cls, )
-                logger.info(
-                    "Injected %s into %s for extended collective_rpc calls %s",
-                    worker_extension_cls, worker_class, extended_calls)
-        with set_current_vllm_config(self.vllm_config):
-            # To make vLLM config available during worker initialization
-            self.worker = worker_class(**kwargs)
-            assert self.worker is not None
-
-    def initialize_from_config(self, kv_cache_configs: List[Any]) -> None:
-        kv_cache_config = kv_cache_configs[self.rpc_rank]
-        with set_current_vllm_config(self.vllm_config):
-            self.worker.initialize_from_config(kv_cache_config)  # type: ignore
-
-    def init_device(self):
-        with set_current_vllm_config(self.vllm_config):
-            # To make vLLM config available during device initialization
-            self.worker.init_device()  # type: ignore
-
-    def execute_method(self, method: Union[str, bytes], *args, **kwargs):
-        try:
-            # method resolution order:
-            # if a method is defined in this class, it will be called directly.
-            # otherwise, since we define `__getattr__` and redirect attribute
-            # query to `self.worker`, the method will be called on the worker.
-            return run_method(self, method, args, kwargs)
-        except Exception as e:
-            # if the driver worker also execute methods,
-            # exceptions in the rest worker may cause deadlock in rpc like ray
-            # see https://github.com/vllm-project/vllm/issues/3455
-            # print the error and inform the user to solve the error
-            msg = (f"Error executing method {method!r}. "
-                   "This might cause deadlock in distributed execution.")
-            logger.exception(msg)
-            raise e
-
-    def __getattr__(self, attr):
-        return getattr(self.worker, attr)