[Core][Distributed] code deduplication in tp&pp with coordinator(#5293)

[Core][Distributed] add coordinator to reduce code duplication in tp and pp (#5293)

tests/conftest.py

@@ -15,7 +15,8 @@ from transformers import (AutoModelForCausalLM, AutoModelForVision2Seq,
 
 from vllm import LLM, SamplingParams
 from vllm.config import TokenizerPoolConfig, VisionLanguageConfig
-from vllm.distributed import destroy_model_parallel
+from vllm.distributed import (destroy_distributed_environment,
+                              destroy_model_parallel)
 from vllm.inputs import TextPrompt
 from vllm.logger import init_logger
 from vllm.multimodal import MultiModalData
@@ -54,6 +55,7 @@ def _read_prompts(filename: str) -> List[str]:
 
 def cleanup():
     destroy_model_parallel()
+    destroy_distributed_environment()
     with contextlib.suppress(AssertionError):
         torch.distributed.destroy_process_group()
     gc.collect()

tests/distributed/test_custom_all_reduce.py

@@ -7,9 +7,9 @@ import torch
 import torch.distributed as dist
 
 from vllm.distributed.communication_op import (  # noqa
-    graph_capture, tensor_model_parallel_all_reduce)
+    tensor_model_parallel_all_reduce)
 from vllm.distributed.parallel_state import (get_tensor_model_parallel_group,
-                                             get_tp_ca_communicator)
+                                             get_tp_group, graph_capture)
 
 from ..utils import (init_test_distributed_environment,
                      multi_process_tensor_parallel)
@@ -91,7 +91,7 @@ def eager_allreduce(tp_size, pp_size, rank, distributed_init_port):
     # communicate independently
     num_communication = rank // tp_size + 1
     sz = 1024
-    fa = get_tp_ca_communicator()
+    fa = get_tp_group().ca_comm
     inp = torch.ones(sz, dtype=torch.float32, device=device)
     out = inp
     for _ in range(num_communication):

tests/distributed/test_pynccl.py

@@ -6,10 +6,11 @@ import torch
 import torch.distributed
 
 from vllm.distributed.communication_op import (  # noqa
-    graph_capture, tensor_model_parallel_all_reduce)
+    tensor_model_parallel_all_reduce)
 from vllm.distributed.device_communicators.pynccl import PyNcclCommunicator
 from vllm.distributed.device_communicators.pynccl_wrapper import NCCLLibrary
 from vllm.distributed.parallel_state import (ensure_model_parallel_initialized,
+                                             get_world_group, graph_capture,
                                              init_distributed_environment)
 from vllm.utils import update_environment_variables
 
@@ -53,7 +54,8 @@ def worker_fn_wrapper(fn):
 
 @worker_fn_wrapper
 def worker_fn():
-    pynccl_comm = PyNcclCommunicator()
+    pynccl_comm = PyNcclCommunicator(get_world_group().cpu_group,
+                                     device=get_world_group().device)
     tensor = torch.ones(16, 1024, 1024,
                         dtype=torch.float32).cuda(pynccl_comm.rank)
     with pynccl_comm.change_state(enable=True):
@@ -129,7 +131,8 @@ def test_pynccl_multiple_allreduce_with_vllm():
 def worker_fn_with_cudagraph():
     with torch.no_grad():
         graph = torch.cuda.CUDAGraph()
-        pynccl_comm = PyNcclCommunicator()
+        pynccl_comm = PyNcclCommunicator(get_world_group().cpu_group,
+                                         device=get_world_group().device)
         # run something in the default stream to initialize torch engine
         a = torch.ones((4, 4), device=f'cuda:{pynccl_comm.rank}')
         torch.cuda.synchronize()
@@ -154,7 +157,8 @@ def test_pynccl_with_cudagraph():
 
 @worker_fn_wrapper
 def send_recv_worker_fn():
-    pynccl_comm = PyNcclCommunicator()
+    pynccl_comm = PyNcclCommunicator(get_world_group().cpu_group,
+                                     device=get_world_group().device)
     if pynccl_comm.rank == 0:
         tensor = torch.ones(16, 1024, 1024,
                             dtype=torch.float32).cuda(pynccl_comm.rank)

tests/lora/conftest.py

@@ -12,7 +12,10 @@ from huggingface_hub import snapshot_download
 
 import vllm
 from vllm.config import LoRAConfig
-from vllm.distributed import destroy_model_parallel, initialize_model_parallel
+from vllm.distributed import (destroy_distributed_environment,
+                              destroy_model_parallel,
+                              init_distributed_environment,
+                              initialize_model_parallel)
 from vllm.model_executor.layers.linear import (ColumnParallelLinear,
                                                MergedColumnParallelLinear,
                                                RowParallelLinear)
@@ -35,6 +38,7 @@ LONG_LORA_INFOS = [{
 
 def cleanup():
     destroy_model_parallel()
+    destroy_distributed_environment()
     with contextlib.suppress(AssertionError):
         torch.distributed.destroy_process_group()
     gc.collect()
@@ -64,15 +68,14 @@ def cleanup_fixture(should_do_global_cleanup_after_test: bool):
 
 @pytest.fixture
 def dist_init():
-    if not torch.distributed.is_initialized():
-        temp_file = tempfile.mkstemp()[1]
-        torch.distributed.init_process_group(
-            backend="nccl",
-            world_size=1,
-            rank=0,
-            init_method=f"file://{temp_file}",
-        )
-        torch.distributed.all_reduce(torch.zeros(1).cuda())
+    temp_file = tempfile.mkstemp()[1]
+    init_distributed_environment(
+        world_size=1,
+        rank=0,
+        distributed_init_method=f"file://{temp_file}",
+        local_rank=0,
+        backend="nccl",
+    )
     initialize_model_parallel(1, 1)
     yield
     cleanup()

tests/worker/test_model_runner.py

 import pytest
 import torch
 
-from vllm.distributed.parallel_state import init_distributed_environment
+from vllm.distributed.parallel_state import (ensure_model_parallel_initialized,
+                                             init_distributed_environment)
 from vllm.engine.arg_utils import EngineArgs
 from vllm.model_executor.sampling_metadata import SamplingMetadata
 from vllm.sequence import SamplingParams, SequenceData, SequenceGroupMetadata
@@ -292,6 +293,7 @@ def distributed_init():
         rank=0,
         distributed_init_method=f"tcp://127.0.0.1:{get_open_port()}",
         local_rank=0)
+    ensure_model_parallel_initialized(1, 1)
 
 
 @pytest.mark.parametrize("batch_size", list(range(2, 128)))

vllm/attention/backends/pallas.py

@@ -110,7 +110,7 @@ class PallasAttentionBackendImpl(AttentionImpl):
             raise NotImplementedError("TPU version must be 4 or higher.")
 
         self.megacore_mode = None
-        tpu_type = torch_xla.tpu.get_tpu_env()["TYPE"].lower()
+        tpu_type = torch_xla.tpu.get_tp_groupu_env()["TYPE"].lower()
         if not tpu_type.endswith("lite"):
             if self.num_kv_heads % 2 == 0:
                 self.megacore_mode = "kv_head"

vllm/distributed/communication_op.py

-from collections import namedtuple
-from contextlib import contextmanager, nullcontext
-from dataclasses import dataclass
-from typing import Any, Dict, List, Optional, Tuple, Union
+from typing import Any, Dict, Optional, Union
 
 import torch
-from torch.distributed import ProcessGroup
+import torch.distributed
 
-from .parallel_state import (get_cpu_world_group, get_pp_pynccl_communicator,
-                             get_tensor_model_parallel_group,
-                             get_tensor_model_parallel_rank,
-                             get_tensor_model_parallel_world_size,
-                             get_tp_ca_communicator,
-                             get_tp_pynccl_communicator)
-
-
-@dataclass
-class GraphCaptureContext:
-    stream: torch.cuda.Stream
-
-
-@contextmanager
-def graph_capture():
-    """
-    `graph_capture` is a context manager which should surround the code that
-    is capturing the CUDA graph. Its main purpose is to ensure that the
-    some operations will be run after the graph is captured, before the graph
-    is replayed. It returns a `GraphCaptureContext` object which contains the
-    necessary data for the graph capture. Currently, it only contains the
-    stream that the graph capture is running on. This stream is set to the
-    current CUDA stream when the context manager is entered and reset to the
-    default stream when the context manager is exited. This is to ensure that
-    the graph capture is running on a separate stream from the default stream,
-    in order to explicitly distinguish the kernels to capture
-    from other kernels possibly launched on background in the default stream.
-    """
-    stream = torch.cuda.Stream()
-    graph_capture_context = GraphCaptureContext(stream)
-    ca_comm = get_tp_ca_communicator()
-    maybe_ca_context = nullcontext() if ca_comm is None else ca_comm.capture()
-    with torch.cuda.stream(stream), maybe_ca_context:
-        # In graph mode, we have to be very careful about the collective
-        # operations. The current status is:
-        #     allreduce \ Mode   |  Eager  |  Graph  |
-        # --------------------------------------------
-        # custom allreduce       | enabled | enabled |
-        # PyNccl                 | disabled| enabled |
-        # torch.distributed      | enabled | disabled|
-        #
-        # Note that custom allreduce will have a runtime check, if the tensor
-        #  size is too large, it will fallback to the next available option.
-        # In summary: When using CUDA graph, we use
-        # either custom all-reduce kernel or pynccl. When not using CUDA
-        # graph, we use either custom all-reduce kernel or PyTorch NCCL.
-        # We always prioritize using custom all-reduce kernel but fall back
-        # to PyTorch or pynccl if it is disabled or not supported.
-        tp_pynccl_comm = get_tp_pynccl_communicator()
-        pp_pynccl_comm = get_pp_pynccl_communicator()
-        if not tp_pynccl_comm:
-            maybe_tp_pynccl_context = nullcontext()
-        else:
-            maybe_tp_pynccl_context = tp_pynccl_comm.change_state(
-                enable=True, stream=torch.cuda.current_stream())
-        if not pp_pynccl_comm:
-            maybe_pp_pynccl_context = nullcontext()
-        else:
-            maybe_pp_pynccl_context = pp_pynccl_comm.change_state(
-                enable=True, stream=torch.cuda.current_stream())
-        with maybe_tp_pynccl_context, maybe_pp_pynccl_context:
-            yield graph_capture_context
+from .parallel_state import get_tp_group
 
 
 def tensor_model_parallel_all_reduce(input_: torch.Tensor) -> torch.Tensor:
-    """All-reduce the input tensor across model parallel group.
-
-    NOTE: This operation will be applied in-place on the input tensor if
-    disable_custom_all_reduce is set to True. Otherwise, this operation may or
-    may not be applied in place depending on whether custom all reduce is
-    invoked for a particular tensor, which further depends on the tensor size
-    and GPU topology.
-
-    TLDR: always assume this function modifies its input, but use the return
-    value as the output.
-    """
-    ca_comm = get_tp_ca_communicator()
-
-    # Bypass the function if we are using only 1 GPU.
-    if get_tensor_model_parallel_world_size() == 1:
-        return input_
-    if ca_comm is not None:
-        out = ca_comm.custom_all_reduce(input_)
-        if out is not None:
-            return out
-    pynccl_comm = get_tp_pynccl_communicator()
-    if (pynccl_comm is not None and not pynccl_comm.disabled):
-        pynccl_comm.all_reduce(input_)
-    else:
-        torch.distributed.all_reduce(input_,
-                                     group=get_tensor_model_parallel_group())
-    return input_
+    """All-reduce the input tensor across model parallel group."""
+    return get_tp_group().all_reduce(input_)
 
 
 def tensor_model_parallel_all_gather(input_: torch.Tensor,
                                      dim: int = -1) -> torch.Tensor:
     """All-gather the input tensor across model parallel group."""
-    world_size = get_tensor_model_parallel_world_size()
-    # Bypass the function if we are using only 1 GPU.
-    if world_size == 1:
-        return input_
-    assert -input_.dim() <= dim < input_.dim(), (
-        f"Invalid dim ({dim}) for input tensor with shape {input_.size()}")
-    if dim < 0:
-        # Convert negative dim to positive.
-        dim += input_.dim()
-    input_size = input_.size()
-    # Allocate output tensor.
-    output_tensor = torch.empty((world_size, ) + input_size,
-                                dtype=input_.dtype,
-                                device=input_.device)
-    # All-gather.
-    torch.distributed.all_gather_into_tensor(
-        output_tensor, input_, group=get_tensor_model_parallel_group())
-    # Reshape
-    output_tensor = output_tensor.movedim(0, dim)
-    output_tensor = output_tensor.reshape(input_size[:dim] +
-                                          (world_size * input_size[dim], ) +
-                                          input_size[dim + 1:])
-    return output_tensor
+    return get_tp_group().all_gather(input_, dim)
 
 
 def tensor_model_parallel_gather(input_: torch.Tensor,
                                  dst: int = 0,
                                  dim: int = -1) -> torch.Tensor:
-    """Gather the input tensor across model parallel group.
-
-    NOTE: We assume that the input tensor is on the same device across
-    all the ranks.
-    """
-    world_size = get_tensor_model_parallel_world_size()
-    # Bypass the function if we are using only 1 GPU.
-    if world_size == 1:
-        return input_
-    assert -input_.dim() <= dim < input_.dim(), (
-        f"Invalid dim ({dim}) for input tensor with shape {input_.size()}")
-    if dim < 0:
-        # Convert negative dim to positive.
-        dim += input_.dim()
-    # Allocate output tensor.
-    if get_tensor_model_parallel_rank() == dst:
-        gather_list = [torch.empty_like(input_) for _ in range(world_size)]
-    else:
-        gather_list = None
-    # Gather.
-    torch.distributed.gather(input_,
-                             gather_list,
-                             dst=dst,
-                             group=get_tensor_model_parallel_group())
-    if get_tensor_model_parallel_rank() == dst:
-        output_tensor = torch.cat(gather_list, dim=dim)
-    else:
-        output_tensor = None
-    return output_tensor
-
-
-def broadcast(input_: torch.Tensor,
-              src: int = 0,
-              group: Optional[ProcessGroup] = None):
-    """Broadcast the input tensor."""
-    group = group or torch.distributed.group.WORLD
-    ranks = torch.distributed.get_process_group_ranks(group)
-    assert src in ranks, f"Invalid src rank ({src})"
-
-    # Bypass the function if we are using only 1 GPU.
-    world_size = torch.distributed.get_world_size(group=group)
-    if world_size == 1:
-        return input_
-    # Broadcast.
-    torch.distributed.broadcast(input_, src=src, group=group)
-    return input_
+    """Gather the input tensor across model parallel group."""
+    return get_tp_group().gather(input_, dst, dim)
 
 
-def broadcast_object_list(obj_list: List[Any],
-                          src: int = 0,
-                          group: Optional[ProcessGroup] = None):
-    """Broadcast the input object list."""
-    group = group or torch.distributed.group.WORLD
-    ranks = torch.distributed.get_process_group_ranks(group)
-    assert src in ranks, f"Invalid src rank ({src})"
-
-    # Bypass the function if we are using only 1 GPU.
-    world_size = torch.distributed.get_world_size(group=group)
-    if world_size == 1:
-        return obj_list
-    # Broadcast.
-    torch.distributed.broadcast_object_list(obj_list, src=src, group=group)
-    return obj_list
-
-
-TensorMetadata = namedtuple("TensorMetadata", ["device", "dtype", "size"])
-
-
-def _split_tensor_dict(
-    tensor_dict: Dict[Any, Union[torch.Tensor, Any]]
-) -> Tuple[List[Tuple[str, Any]], List[torch.Tensor]]:
-    """Split the tensor dictionary into two parts:
-    1. A list of (key, value) pairs. If the value is a tensor, it is replaced
-         by its metadata.
-    2. A list of tensors.
-    """
-    metadata_list = []
-    tensor_list = []
-    for key, value in tensor_dict.items():
-        if isinstance(value, torch.Tensor):
-            # Note: we cannot use `value.device` here,
-            # because it contains not only the device type but also the device
-            # index (e.g. "cuda:0"). We only need the device type.
-            # receiving side will set the device index.
-            device = "cpu" if value.is_cpu else "cuda"
-            metadata_list.append(
-                (key, TensorMetadata(device, value.dtype, value.size())))
-            tensor_list.append(value)
-        else:
-            metadata_list.append((key, value))
-    return metadata_list, tensor_list
-
-
-def broadcast_tensor_dict(
-    tensor_dict: Optional[Dict[Any, Union[torch.Tensor, Any]]] = None,
-    src: int = 0,
-    group: Optional[ProcessGroup] = None,
-    metadata_group: Optional[ProcessGroup] = None
-) -> Optional[Dict[Any, Union[torch.Tensor, Any]]]:
-    """Broadcast the input tensor dictionary.
-    `group` is used to broadcast the tensors, while `metadata_group` is used
-     to broadcast the metadata of the dict (e.g. dict structure, tensor sizes,
-     dtypes).
-    """
-    # Bypass the function if we are using only 1 GPU.
-    if (not torch.distributed.is_initialized()
-            or torch.distributed.get_world_size(group=group) == 1):
+def broadcast_tensor_dict(tensor_dict: Optional[Dict[Any, Union[torch.Tensor,
+                                                                Any]]] = None,
+                          src: int = 0):
+    if not torch.distributed.is_initialized():
         return tensor_dict
-
-    group = group or torch.distributed.group.WORLD
-    metadata_group = metadata_group or get_cpu_world_group()
-    ranks = torch.distributed.get_process_group_ranks(group)
-    assert src in ranks, f"Invalid src rank ({src})"
-
-    rank = torch.distributed.get_rank()
-    if rank == src:
-        metadata_list: List[Tuple[Any, Any]] = []
-        assert isinstance(
-            tensor_dict,
-            dict), (f"Expecting a dictionary, got {type(tensor_dict)}")
-        metadata_list, tensor_list = _split_tensor_dict(tensor_dict)
-        # `metadata_list` lives in CPU memory.
-        # `broadcast_object_list` involves serialization and deserialization,
-        # all happening on CPU. Therefore, we can use the CPU group.
-        torch.distributed.broadcast_object_list([metadata_list],
-                                                src=src,
-                                                group=metadata_group)
-        async_handles = []
-        for tensor in tensor_list:
-            if tensor.numel() == 0:
-                # Skip broadcasting empty tensors.
-                continue
-            if tensor.is_cpu:
-                # use metadata_group for CPU tensors
-                handle = torch.distributed.broadcast(tensor,
-                                                     src=src,
-                                                     group=metadata_group,
-                                                     async_op=True)
-            else:
-                # use group for GPU tensors
-                handle = torch.distributed.broadcast(tensor,
-                                                     src=src,
-                                                     group=group,
-                                                     async_op=True)
-            async_handles.append(handle)
-        for async_handle in async_handles:
-            async_handle.wait()
-
-    else:
-        recv_metadata_list = [None]
-        torch.distributed.broadcast_object_list(recv_metadata_list,
-                                                src=src,
-                                                group=metadata_group)
-        assert recv_metadata_list[0] is not None
-        tensor_dict = {}
-        async_handles = []
-        for key, value in recv_metadata_list[0]:
-            if isinstance(value, TensorMetadata):
-                tensor = torch.empty(value.size,
-                                     dtype=value.dtype,
-                                     device=value.device)
-                if tensor.numel() == 0:
-                    # Skip broadcasting empty tensors.
-                    tensor_dict[key] = tensor
-                    continue
-                if tensor.is_cpu:
-                    # use metadata_group for CPU tensors
-                    handle = torch.distributed.broadcast(tensor,
-                                                         src=src,
-                                                         group=metadata_group,
-                                                         async_op=True)
-                else:
-                    # use group for GPU tensors
-                    handle = torch.distributed.broadcast(tensor,
-                                                         src=src,
-                                                         group=group,
-                                                         async_op=True)
-                async_handles.append(handle)
-                tensor_dict[key] = tensor
-            else:
-                tensor_dict[key] = value
-        for async_handle in async_handles:
-            async_handle.wait()
-    return tensor_dict
+    return get_tp_group().broadcast_tensor_dict(tensor_dict, src)

vllm/distributed/device_communicators/custom_all_reduce.py

@@ -9,8 +9,7 @@ import vllm.envs as envs
 from vllm import _custom_ops as ops
 from vllm.distributed.device_communicators.custom_all_reduce_utils import (
     gpu_p2p_access_check)
-from vllm.distributed.parallel_state import (
-    get_local_rank, get_tensor_model_parallel_cpu_group, is_in_the_same_node)
+from vllm.distributed.parallel_state import is_in_the_same_node
 from vllm.logger import init_logger
 
 try:
@@ -86,8 +85,8 @@ class CustomAllreduce:
 
     # max_size: max supported allreduce size
     def __init__(self,
-                 group: Optional[ProcessGroup] = None,
-                 device: Optional[Union[int, str, torch.device]] = None,
+                 group: ProcessGroup,
+                 device: Union[int, str, torch.device],
                  max_size=8192 * 1024) -> None:
         """
         Args:
@@ -107,7 +106,6 @@ class CustomAllreduce:
             # e.g. in a non-cuda environment
             return
 
-        group = group or get_tensor_model_parallel_cpu_group()
         self.group = group
 
         assert dist.get_backend(group) != dist.Backend.NCCL, (
@@ -134,10 +132,7 @@ class CustomAllreduce:
                 world_size, str(CustomAllreduce._SUPPORTED_WORLD_SIZES))
             return
 
-        if device is None:
-            local_rank = get_local_rank()
-            device = torch.device(f"cuda:{local_rank}")
-        elif isinstance(device, int):
+        if isinstance(device, int):
             device = torch.device(f"cuda:{device}")
         elif isinstance(device, str):
             device = torch.device(device)

vllm/distributed/device_communicators/custom_all_reduce_utils.py

@@ -11,7 +11,6 @@ import torch.distributed as dist
 import torch.multiprocessing as mp
 
 import vllm.envs as envs
-from vllm.distributed.parallel_state import get_cpu_world_group, get_local_rank
 from vllm.logger import init_logger
 
 logger = init_logger(__name__)
@@ -162,7 +161,8 @@ def gpu_p2p_access_check(i: int, j: int) -> bool:
         f"{VLLM_CONFIG_ROOT}/vllm/gpu_p2p_access_cache_for_{cuda_visible_devices}.json"
     )
     os.makedirs(os.path.dirname(path), exist_ok=True)
-    if ((not is_distributed or get_local_rank() == 0)
+    from vllm.distributed.parallel_state import get_world_group
+    if ((not is_distributed or get_world_group().local_rank == 0)
             and (not os.path.exists(path))):
         # only the local master process (with local_rank == 0) can
         #  enter this block to calculate the cache
@@ -174,8 +174,7 @@ def gpu_p2p_access_check(i: int, j: int) -> bool:
         with open(path, "w") as f:
             json.dump(cache, f, indent=4)
     if is_distributed:
-        cpu_world_group = get_cpu_world_group()
-        dist.barrier(cpu_world_group)
+        get_world_group().barrier()
     logger.info("reading GPU P2P access cache from %s", path)
     with open(path, "r") as f:
         cache = json.load(f)

vllm/distributed/device_communicators/pynccl.py

@@ -9,7 +9,6 @@ from torch.distributed import ProcessGroup, ReduceOp
 from vllm.distributed.device_communicators.pynccl_wrapper import (
     NCCLLibrary, buffer_type, cudaStream_t, ncclComm_t, ncclDataTypeEnum,
     ncclRedOpTypeEnum, ncclUniqueId)
-from vllm.distributed.parallel_state import get_cpu_world_group, get_local_rank
 from vllm.logger import init_logger
 
 logger = init_logger(__name__)
@@ -19,8 +18,8 @@ class PyNcclCommunicator:
 
     def __init__(
         self,
-        group: Optional[ProcessGroup] = None,
-        device: Optional[Union[int, str, torch.device]] = None,
+        group: ProcessGroup,
+        device: Union[int, str, torch.device],
         library_path: Optional[str] = None,
     ):
         """
@@ -35,7 +34,6 @@ class PyNcclCommunicator:
         is bind to a unique device.
         """
         assert dist.is_initialized()
-        group = get_cpu_world_group() if group is None else group
         assert dist.get_backend(group) != dist.Backend.NCCL, (
             "PyNcclCommunicator should be attached to a non-NCCL group.")
         self.group = group
@@ -77,10 +75,7 @@ class PyNcclCommunicator:
         byte_list = tensor.tolist()
         for i, byte in enumerate(byte_list):
             self.unique_id.internal[i] = byte
-        if device is None:
-            local_rank = get_local_rank()
-            device = torch.device(f"cuda:{local_rank}")
-        elif isinstance(device, int):
+        if isinstance(device, int):
             device = torch.device(f"cuda:{device}")
         elif isinstance(device, str):
             device = torch.device(device)

vllm/worker/model_runner.py

@@ -13,7 +13,7 @@ from vllm.config import (CacheConfig, DeviceConfig, LoadConfig, LoRAConfig,
                          ModelConfig, ParallelConfig, SchedulerConfig,
                          VisionLanguageConfig)
 from vllm.distributed import broadcast_tensor_dict
-from vllm.distributed.communication_op import graph_capture
+from vllm.distributed.parallel_state import graph_capture
 from vllm.logger import init_logger
 from vllm.lora.layers import LoRAMapping
 from vllm.lora.request import LoRARequest