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2026-07-13 13:18:33 +08:00

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Python

# Copyright (c) Microsoft Corporation.
# SPDX-License-Identifier: Apache-2.0
# DeepSpeed Team
from deepspeed.utils.groups import _get_expert_parallel_ranks
def test_get_expert_parallel_ranks():
"""
Example - E + M + D parallel
world_size = 16
model_degree = 2
expert_degree = 4 # number of experts in same group
mp_group = [0, 1], [2,3], [4,5] ...
data_parallel_group =[0,2,4,6,8,10, 12,14], [1,3,5,7,9,11,13,15]
expert_parallel_group = [0,2,4,6], [8,10,12,14] [1,3,5,7], [9,11,13,15]
expert_data_parallel_group = [0,8],[2,10],[4,12],[6,14], [1,9],[3,11],[5,13],[7,15]
"""
expert_parallel_groups, expert_data_parallel_groups = _get_expert_parallel_ranks(world_size=16,
tensor_parallel_size_=2,
expert_parallel_size_=4)
assert expert_parallel_groups == [
[0, 2, 4, 6],
[8, 10, 12, 14],
[1, 3, 5, 7],
[9, 11, 13, 15],
]
assert expert_data_parallel_groups == [
[0, 8],
[2, 10],
[4, 12],
[6, 14],
[1, 9],
[3, 11],
[5, 13],
[7, 15],
]