78 lines
2.7 KiB
Python
78 lines
2.7 KiB
Python
# Copyright 2024 Bytedance Ltd. and/or its affiliates
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import logging
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import time
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from cupy.cuda.nccl import NcclCommunicator, get_unique_id
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import ray
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from ray.util import list_named_actors
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@ray.remote
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class NCCLIDStore:
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def __init__(self, nccl_id):
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self._nccl_id = nccl_id
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def get(self):
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return self._nccl_id
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def get_nccl_id_store_by_name(name):
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all_actors = list_named_actors(all_namespaces=True)
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matched_actors = [actor for actor in all_actors if actor.get("name", None) == name]
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if len(matched_actors) == 1:
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actor = matched_actors[0]
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return ray.get_actor(**actor)
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elif len(matched_actors) > 1:
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logging.warning(f"multiple actors with same name found: {matched_actors}")
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elif len(matched_actors) == 0:
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logging.info(f"failed to get any actor named {name}")
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return None
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def create_nccl_communicator_in_ray(rank: int,
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world_size: int,
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group_name: str,
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max_retries: int = 100,
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interval_s: int = 5):
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if rank == 0:
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nccl_id = get_unique_id()
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nccl_id_store = NCCLIDStore.options(name=group_name).remote(nccl_id)
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assert ray.get(nccl_id_store.get.remote()) == nccl_id
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communicator = NcclCommunicator(
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ndev=world_size,
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commId=nccl_id,
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rank=0,
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)
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return communicator
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else:
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for i in range(max_retries):
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nccl_id_store = get_nccl_id_store_by_name(group_name)
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if nccl_id_store is not None:
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logging.info(f"nccl_id_store {group_name} got")
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nccl_id = ray.get(nccl_id_store.get.remote())
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logging.info(f"nccl id for {group_name} got: {nccl_id}")
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communicator = NcclCommunicator(
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ndev=world_size,
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commId=nccl_id,
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rank=rank,
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)
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return communicator
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logging.info(f"failed to get nccl_id for {i+1} time, sleep for {interval_s} seconds")
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time.sleep(interval_s)
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