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50 lines
1.6 KiB
Python
50 lines
1.6 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 os
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import torch
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import torch.distributed as dist
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from vllm.distributed.parallel_state import in_the_same_node_as
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from vllm.distributed.utils import StatelessProcessGroup
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from vllm.utils.network_utils import get_ip, get_open_port
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def _run_test(pg):
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test_result = all(in_the_same_node_as(pg, source_rank=0))
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expected = os.environ.get("VLLM_TEST_SAME_HOST", "1") == "1"
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assert test_result == expected, f"Expected {expected}, got {test_result}"
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if pg == dist.group.WORLD:
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print("Same node test passed! when using torch distributed!")
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else:
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print("Same node test passed! when using StatelessProcessGroup!")
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if __name__ == "__main__":
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dist.init_process_group(backend="gloo")
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rank = dist.get_rank()
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if rank == 0:
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port = get_open_port()
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ip = get_ip()
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dist.broadcast_object_list([ip, port], src=0)
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else:
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recv = [None, None]
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dist.broadcast_object_list(recv, src=0)
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ip, port = recv
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stateless_pg = StatelessProcessGroup.create(ip, port, rank, dist.get_world_size())
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for pg in [dist.group.WORLD, stateless_pg]:
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if os.environ.get("VLLM_TEST_WITH_DEFAULT_DEVICE_SET", "0") == "1":
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default_devices = ["cpu"]
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if torch.cuda.is_available():
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default_devices.append("cuda")
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for device in default_devices:
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torch.set_default_device(device)
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_run_test(pg)
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else:
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_run_test(pg)
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