60 lines
2.2 KiB
Python
60 lines
2.2 KiB
Python
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# Copyright 2023 The JAX Authors.
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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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# https://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 os
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import re
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from typing import Optional
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from jax._src import clusters
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# OMPI_MCA_orte_hnp_uri exists only when processes are launched via mpirun or mpiexec
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_ORTE_URI = 'OMPI_MCA_orte_hnp_uri'
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_PROCESS_COUNT = 'OMPI_COMM_WORLD_SIZE'
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_PROCESS_ID = 'OMPI_COMM_WORLD_RANK'
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_LOCAL_PROCESS_ID = 'OMPI_COMM_WORLD_LOCAL_RANK'
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class OmpiCluster(clusters.ClusterEnv):
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@classmethod
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def is_env_present(cls) -> bool:
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return _ORTE_URI in os.environ
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@classmethod
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def get_coordinator_address(cls) -> str:
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# Examples of orte_uri:
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# 1531576320.0;tcp://10.96.0.1,10.148.0.1,10.108.0.1:34911
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# 1314521088.0;tcp6://[fe80::b9b:ac5d:9cf0:b858,2620:10d:c083:150e::3000:2]:43370
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orte_uri = os.environ[_ORTE_URI]
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job_id_str = orte_uri.split('.', maxsplit=1)[0]
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# The jobid is always a multiple of 2^12, let's divide it by 2^12
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# to reduce likelihood of port conflict between jobs
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job_id = int(job_id_str) // 2**12
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# Pick port in ephemeral range [(65535 - 2^12 + 1), 65535]
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port = job_id % 2**12 + (65535 - 2**12 + 1)
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launcher_ip_match = re.search(r"tcp://(.+?)[,:]|tcp6://\[(.+?)[,\]]", orte_uri)
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if launcher_ip_match is None:
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raise RuntimeError('Could not parse coordinator IP address from Open MPI environment.')
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launcher_ip = next(i for i in launcher_ip_match.groups() if i is not None)
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return f'{launcher_ip}:{port}'
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@classmethod
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def get_process_count(cls) -> int:
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return int(os.environ[_PROCESS_COUNT])
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@classmethod
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def get_process_id(cls) -> int:
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return int(os.environ[_PROCESS_ID])
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@classmethod
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def get_local_process_id(cls) -> Optional[int]:
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return int(os.environ[_LOCAL_PROCESS_ID])
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